eventespresso / event-espresso-core

admin_pages/venues/Venue_Categories_Admin_List_Table.class.php

Spacing +10 added lines, -10 removed lines

@@ -72,9 +72,9 @@ 
     public function column_id($item)
     {
         $content = $item->get('term_id');
-        $content .= '  <span class="show-on-mobile-view-only">' . $item->get_first_related('Term')->get(
+        $content .= '  <span class="show-on-mobile-view-only">'.$item->get_first_related('Term')->get(
             'name'
-        ) . '</span>';
+        ).'</span>';
         return $content;
     }
 
@@ -97,29 +97,29 @@ 
         $term_name = $item->get_first_related('Term')->get('name');
 
         $actions = array(
-            'edit' => '<a href="' . $edit_link . '" aria-label="' . sprintf(
+            'edit' => '<a href="'.$edit_link.'" aria-label="'.sprintf(
                 /* translators: The name of the venue category */
                 esc_attr__(
                     'Edit Category (%s)',
                     'event_espresso'
                 ),
                 $term_name
-            ) . '">' . esc_html__('Edit', 'event_espresso') . '</a>',
+            ).'">'.esc_html__('Edit', 'event_espresso').'</a>',
         );
 
 
-        $actions['delete'] = '<a href="' . $delete_link . '" aria-label="' . sprintf(
+        $actions['delete'] = '<a href="'.$delete_link.'" aria-label="'.sprintf(
             /* translators: The name of the venue category */
             esc_attr__(
                 'Delete Category (%s)',
                 'event_espresso'
             ),
             $term_name
-        ) . '">' . esc_html__('Delete', 'event_espresso') . '</a>';
+        ).'">'.esc_html__('Delete', 'event_espresso').'</a>';
 
-        $content = '<strong><a class="row-title" href="' . $edit_link . '">' . $item->get_first_related('Term')->get(
+        $content = '<strong><a class="row-title" href="'.$edit_link.'">'.$item->get_first_related('Term')->get(
             'name'
-        ) . '</a></strong>';
+        ).'</a></strong>';
         $content .= $this->row_actions($actions);
         return $content;
     }
@@ -127,7 +127,7 @@ 
 
     public function column_shortcode($item)
     {
-        $content = '[EVENT_ESPRESSO_CATEGORY category_id="' . $item->get_first_related('Term')->get('slug') . '"]';
+        $content = '[EVENT_ESPRESSO_CATEGORY category_id="'.$item->get_first_related('Term')->get('slug').'"]';
         return $content;
     }
 
@@ -139,7 +139,7 @@ 
             'category' => $item->get_first_related('Term')->ID(),
         );
         $e_link = EE_Admin_Page::add_query_args_and_nonce($e_args, EE_VENUES_ADMIN_URL);
-        $content = '<a href="' . $e_link . '">' . $item->get('term_count') . '</a>';
+        $content = '<a href="'.$e_link.'">'.$item->get('term_count').'</a>';
         return $content;
     }
 }

Indentation +125 added lines, -125 removed lines

@@ -15,129 +15,129 @@
  */
 class Venue_Categories_Admin_List_Table extends EE_Admin_List_Table
 {
-    protected function _setup_data()
-    {
-        $this->_data = $this->_admin_page->get_categories($this->_per_page, $this->_current_page);
-        $this->_all_data_count = $this->_admin_page->get_categories($this->_per_page, $this->_current_page, true);
-    }
-
-
-    protected function _set_properties()
-    {
-        $this->_wp_list_args = array(
-            'singular' => esc_html__('venue category', 'event_espresso'),
-            'plural'   => esc_html__('venue categories', 'event_espresso'),
-            'ajax'     => true, // for now,
-            'screen'   => $this->_admin_page->get_current_screen()->id,
-        );
-
-        $this->_columns = array(
-            'cb'    => '<input type="checkbox" />',
-            'id'    => esc_html__('ID', 'event_espresso'),
-            'name'  => esc_html__('Name', 'event_espresso'),
-            'count' => esc_html__('Venues', 'event_espresso'),
-        );
-
-        $this->_sortable_columns = array(
-            'id'    => array('Term.term_id' => true),
-            'name'  => array('Term.slug' => false),
-            'count' => array('term_count' => false),
-        );
-
-        $this->_hidden_columns = array();
-    }
-
-
-    // not needed
-    protected function _get_table_filters()
-    {
-        return array();
-    }
-
-
-    protected function _add_view_counts()
-    {
-        $this->_views['all']['count'] = $this->_all_data_count;
-    }
-
-
-    public function column_cb($item)
-    {
-        return sprintf('<input type="checkbox" name="VEN_CAT_ID[]" value="%s" />', $item->get('term_id'));
-    }
-
-
-    public function column_id($item)
-    {
-        $content = $item->get('term_id');
-        $content .= '  <span class="show-on-mobile-view-only">' . $item->get_first_related('Term')->get(
-            'name'
-        ) . '</span>';
-        return $content;
-    }
-
-
-    public function column_name($item)
-    {
-        $edit_query_args = array(
-            'action'     => 'edit_category',
-            'VEN_CAT_ID' => $item->get('term_id'),
-        );
-
-        $delete_query_args = array(
-            'action'     => 'delete_category',
-            'VEN_CAT_ID' => $item->get('term_id'),
-        );
-
-        $edit_link = EE_Admin_Page::add_query_args_and_nonce($edit_query_args, EE_VENUES_ADMIN_URL);
-        $delete_link = EE_Admin_Page::add_query_args_and_nonce($delete_query_args, EE_VENUES_ADMIN_URL);
-
-        $term_name = $item->get_first_related('Term')->get('name');
-
-        $actions = array(
-            'edit' => '<a href="' . $edit_link . '" aria-label="' . sprintf(
-                /* translators: The name of the venue category */
-                esc_attr__(
-                    'Edit Category (%s)',
-                    'event_espresso'
-                ),
-                $term_name
-            ) . '">' . esc_html__('Edit', 'event_espresso') . '</a>',
-        );
-
-
-        $actions['delete'] = '<a href="' . $delete_link . '" aria-label="' . sprintf(
-            /* translators: The name of the venue category */
-            esc_attr__(
-                'Delete Category (%s)',
-                'event_espresso'
-            ),
-            $term_name
-        ) . '">' . esc_html__('Delete', 'event_espresso') . '</a>';
-
-        $content = '<strong><a class="row-title" href="' . $edit_link . '">' . $item->get_first_related('Term')->get(
-            'name'
-        ) . '</a></strong>';
-        $content .= $this->row_actions($actions);
-        return $content;
-    }
-
-
-    public function column_shortcode($item)
-    {
-        $content = '[EVENT_ESPRESSO_CATEGORY category_id="' . $item->get_first_related('Term')->get('slug') . '"]';
-        return $content;
-    }
-
-
-    public function column_count($item)
-    {
-        $e_args = array(
-            'action'   => 'default',
-            'category' => $item->get_first_related('Term')->ID(),
-        );
-        $e_link = EE_Admin_Page::add_query_args_and_nonce($e_args, EE_VENUES_ADMIN_URL);
-        $content = '<a href="' . $e_link . '">' . $item->get('term_count') . '</a>';
-        return $content;
-    }
+	protected function _setup_data()
+	{
+		$this->_data = $this->_admin_page->get_categories($this->_per_page, $this->_current_page);
+		$this->_all_data_count = $this->_admin_page->get_categories($this->_per_page, $this->_current_page, true);
+	}
+
+
+	protected function _set_properties()
+	{
+		$this->_wp_list_args = array(
+			'singular' => esc_html__('venue category', 'event_espresso'),
+			'plural'   => esc_html__('venue categories', 'event_espresso'),
+			'ajax'     => true, // for now,
+			'screen'   => $this->_admin_page->get_current_screen()->id,
+		);
+
+		$this->_columns = array(
+			'cb'    => '<input type="checkbox" />',
+			'id'    => esc_html__('ID', 'event_espresso'),
+			'name'  => esc_html__('Name', 'event_espresso'),
+			'count' => esc_html__('Venues', 'event_espresso'),
+		);
+
+		$this->_sortable_columns = array(
+			'id'    => array('Term.term_id' => true),
+			'name'  => array('Term.slug' => false),
+			'count' => array('term_count' => false),
+		);
+
+		$this->_hidden_columns = array();
+	}
+
+
+	// not needed
+	protected function _get_table_filters()
+	{
+		return array();
+	}
+
+
+	protected function _add_view_counts()
+	{
+		$this->_views['all']['count'] = $this->_all_data_count;
+	}
+
+
+	public function column_cb($item)
+	{
+		return sprintf('<input type="checkbox" name="VEN_CAT_ID[]" value="%s" />', $item->get('term_id'));
+	}
+
+
+	public function column_id($item)
+	{
+		$content = $item->get('term_id');
+		$content .= '  <span class="show-on-mobile-view-only">' . $item->get_first_related('Term')->get(
+			'name'
+		) . '</span>';
+		return $content;
+	}
+
+
+	public function column_name($item)
+	{
+		$edit_query_args = array(
+			'action'     => 'edit_category',
+			'VEN_CAT_ID' => $item->get('term_id'),
+		);
+
+		$delete_query_args = array(
+			'action'     => 'delete_category',
+			'VEN_CAT_ID' => $item->get('term_id'),
+		);
+
+		$edit_link = EE_Admin_Page::add_query_args_and_nonce($edit_query_args, EE_VENUES_ADMIN_URL);
+		$delete_link = EE_Admin_Page::add_query_args_and_nonce($delete_query_args, EE_VENUES_ADMIN_URL);
+
+		$term_name = $item->get_first_related('Term')->get('name');
+
+		$actions = array(
+			'edit' => '<a href="' . $edit_link . '" aria-label="' . sprintf(
+				/* translators: The name of the venue category */
+				esc_attr__(
+					'Edit Category (%s)',
+					'event_espresso'
+				),
+				$term_name
+			) . '">' . esc_html__('Edit', 'event_espresso') . '</a>',
+		);
+
+
+		$actions['delete'] = '<a href="' . $delete_link . '" aria-label="' . sprintf(
+			/* translators: The name of the venue category */
+			esc_attr__(
+				'Delete Category (%s)',
+				'event_espresso'
+			),
+			$term_name
+		) . '">' . esc_html__('Delete', 'event_espresso') . '</a>';
+
+		$content = '<strong><a class="row-title" href="' . $edit_link . '">' . $item->get_first_related('Term')->get(
+			'name'
+		) . '</a></strong>';
+		$content .= $this->row_actions($actions);
+		return $content;
+	}
+
+
+	public function column_shortcode($item)
+	{
+		$content = '[EVENT_ESPRESSO_CATEGORY category_id="' . $item->get_first_related('Term')->get('slug') . '"]';
+		return $content;
+	}
+
+
+	public function column_count($item)
+	{
+		$e_args = array(
+			'action'   => 'default',
+			'category' => $item->get_first_related('Term')->ID(),
+		);
+		$e_link = EE_Admin_Page::add_query_args_and_nonce($e_args, EE_VENUES_ADMIN_URL);
+		$content = '<a href="' . $e_link . '">' . $item->get('term_count') . '</a>';
+		return $content;
+	}
 }

core/db_classes/EE_Registration.class.php

Spacing +15 added lines, -15 removed lines

@@ -148,7 +148,7 @@ 
     {
         switch ($field_name) {
             case 'REG_code':
-                if (! empty($field_value) && $this->reg_code() === null) {
+                if ( ! empty($field_value) && $this->reg_code() === null) {
                     $this->set_reg_code($field_value, $use_default);
                 }
                 break;
@@ -449,7 +449,7 @@ 
     public function event()
     {
         $event = $this->get_first_related('Event');
-        if (! $event instanceof \EE_Event) {
+        if ( ! $event instanceof \EE_Event) {
             throw new EntityNotFoundException('Event ID', $this->event_ID());
         }
         return $event;
@@ -496,7 +496,7 @@ 
     {
         // reserved ticket and datetime counts will be decremented as sold counts are incremented
         // so stop tracking that this reg has a ticket reserved
-        $this->release_reserved_ticket(false, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
+        $this->release_reserved_ticket(false, "REG: {$this->ID()} (ln:".__LINE__.')');
         $ticket = $this->ticket();
         $ticket->increaseSold();
         // possibly set event status to sold out
@@ -546,7 +546,7 @@ 
             $reserved = $this->update_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true);
             if ($reserved && $update_ticket) {
                 $ticket = $this->ticket();
-                $ticket->increaseReserved(1, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
+                $ticket->increaseReserved(1, "REG: {$this->ID()} (ln:".__LINE__.')');
                 $this->update_extra_meta('reserve_ticket', "{$this->ticket_ID()} from {$source}");
                 $ticket->save();
             }
@@ -574,7 +574,7 @@ 
             $reserved = $this->update_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, false);
             if ($reserved && $update_ticket) {
                 $ticket = $this->ticket();
-                $ticket->decreaseReserved(1, true, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
+                $ticket->decreaseReserved(1, true, "REG: {$this->ID()} (ln:".__LINE__.')');
                 $this->update_extra_meta('release_reserved_ticket', "{$this->ticket_ID()} from {$source}");
             }
         }
@@ -1460,7 +1460,7 @@ 
                     : '';
                 break;
         }
-        return $icon . $status[ $this->status_ID() ];
+        return $icon.$status[$this->status_ID()];
     }
 
 
@@ -1716,7 +1716,7 @@ 
     {
         $DTT_ID = EEM_Datetime::instance()->ensure_is_ID($DTT_OR_ID);
         // first check registration status
-        if (! $DTT_ID || ($check_approved && ! $this->is_approved())) {
+        if ( ! $DTT_ID || ($check_approved && ! $this->is_approved())) {
             return false;
         }
         // is there a datetime ticket that matches this dtt_ID?
@@ -1756,7 +1756,7 @@ 
     {
         $DTT_ID = EEM_Datetime::instance()->ensure_is_ID($DTT_OR_ID);
 
-        if (! $DTT_ID) {
+        if ( ! $DTT_ID) {
             return false;
         }
 
@@ -1764,7 +1764,7 @@ 
 
         // if max uses is not set or equals infinity then return true cause its not a factor for whether user can
         // check-in or not.
-        if (! $max_uses || $max_uses === EE_INF) {
+        if ( ! $max_uses || $max_uses === EE_INF) {
             return true;
         }
 
@@ -1828,7 +1828,7 @@ 
             $datetime = $this->get_latest_related_datetime();
             $DTT_ID = $datetime instanceof EE_Datetime ? $datetime->ID() : 0;
             // verify the registration can checkin for the given DTT_ID
-        } elseif (! $this->can_checkin($DTT_ID, $verify)) {
+        } elseif ( ! $this->can_checkin($DTT_ID, $verify)) {
             EE_Error::add_error(
                 sprintf(
                     esc_html__(
@@ -1851,7 +1851,7 @@ 
         );
         // start by getting the current status so we know what status we'll be changing to.
         $cur_status = $this->check_in_status_for_datetime($DTT_ID);
-        $status_to = $status_paths[ $cur_status ];
+        $status_to = $status_paths[$cur_status];
         // database only records true for checked IN or false for checked OUT
         // no record ( null ) means checked in NEVER, but we obviously don't save that
         $new_status = $status_to === EE_Checkin::status_checked_in;
@@ -2042,7 +2042,7 @@ 
     public function transaction()
     {
         $transaction = $this->get_first_related('Transaction');
-        if (! $transaction instanceof \EE_Transaction) {
+        if ( ! $transaction instanceof \EE_Transaction) {
             throw new EntityNotFoundException('Transaction ID', $this->transaction_ID());
         }
         return $transaction;
@@ -2115,11 +2115,11 @@ 
             );
             return;
         }
-        if (! $this->reg_code()) {
+        if ( ! $this->reg_code()) {
             parent::set('REG_code', $REG_code, $use_default);
         } else {
             EE_Error::doing_it_wrong(
-                __CLASS__ . '::' . __FUNCTION__,
+                __CLASS__.'::'.__FUNCTION__,
                 esc_html__('Can not change a registration REG_code once it has been set.', 'event_espresso'),
                 '4.6.0'
             );
@@ -2310,7 +2310,7 @@ 
                 break;
             }
         }
-        if (! ($line_item instanceof \EE_Line_Item && $line_item->OBJ_type() === 'Ticket')) {
+        if ( ! ($line_item instanceof \EE_Line_Item && $line_item->OBJ_type() === 'Ticket')) {
             throw new EntityNotFoundException('Line Item Ticket ID', $ticket->ID());
         }
         return $line_item;

Indentation +2499 added lines, -2499 removed lines

@@ -16,2503 +16,2503 @@
  */
 class EE_Registration extends EE_Soft_Delete_Base_Class implements EEI_Registration, EEI_Admin_Links
 {
-    /**
-     * Used to reference when a registration has never been checked in.
-     *
-     * @deprecated use \EE_Checkin::status_checked_never instead
-     * @type int
-     */
-    const checkin_status_never = 2;
-
-    /**
-     * Used to reference when a registration has been checked in.
-     *
-     * @deprecated use \EE_Checkin::status_checked_in instead
-     * @type int
-     */
-    const checkin_status_in = 1;
-
-    /**
-     * Used to reference when a registration has been checked out.
-     *
-     * @deprecated use \EE_Checkin::status_checked_out instead
-     * @type int
-     */
-    const checkin_status_out = 0;
-
-    /**
-     * extra meta key for tracking reg status os trashed registrations
-     *
-     * @type string
-     */
-    const PRE_TRASH_REG_STATUS_KEY = 'pre_trash_registration_status';
-
-    /**
-     * extra meta key for tracking if registration has reserved ticket
-     *
-     * @type string
-     */
-    const HAS_RESERVED_TICKET_KEY = 'has_reserved_ticket';
-
-
-    /**
-     * @param array  $props_n_values          incoming values
-     * @param string $timezone                incoming timezone (if not set the timezone set for the website will be
-     *                                        used.)
-     * @param array  $date_formats            incoming date_formats in an array where the first value is the
-     *                                        date_format and the second value is the time format
-     * @return EE_Registration
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public static function new_instance($props_n_values = array(), $timezone = null, $date_formats = array())
-    {
-        $has_object = parent::_check_for_object($props_n_values, __CLASS__, $timezone, $date_formats);
-        return $has_object ? $has_object : new self($props_n_values, false, $timezone, $date_formats);
-    }
-
-
-    /**
-     * @param array  $props_n_values  incoming values from the database
-     * @param string $timezone        incoming timezone as set by the model.  If not set the timezone for
-     *                                the website will be used.
-     * @return EE_Registration
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public static function new_instance_from_db($props_n_values = array(), $timezone = null)
-    {
-        return new self($props_n_values, true, $timezone);
-    }
-
-
-    /**
-     *        Set Event ID
-     *
-     * @param        int $EVT_ID Event ID
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_event($EVT_ID = 0)
-    {
-        $this->set('EVT_ID', $EVT_ID);
-    }
-
-
-    /**
-     * Overrides parent set() method so that all calls to set( 'REG_code', $REG_code ) OR set( 'STS_ID', $STS_ID ) can
-     * be routed to internal methods
-     *
-     * @param string $field_name
-     * @param mixed  $field_value
-     * @param bool   $use_default
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set($field_name, $field_value, $use_default = false)
-    {
-        switch ($field_name) {
-            case 'REG_code':
-                if (! empty($field_value) && $this->reg_code() === null) {
-                    $this->set_reg_code($field_value, $use_default);
-                }
-                break;
-            case 'STS_ID':
-                $this->set_status($field_value, $use_default);
-                break;
-            default:
-                parent::set($field_name, $field_value, $use_default);
-        }
-    }
-
-
-    /**
-     * Set Status ID
-     * updates the registration status and ALSO...
-     * calls reserve_registration_space() if the reg status changes TO approved from any other reg status
-     * calls release_registration_space() if the reg status changes FROM approved to any other reg status
-     *
-     * @param string                $new_STS_ID
-     * @param boolean               $use_default
-     * @param ContextInterface|null $context
-     * @return bool
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_status($new_STS_ID = null, $use_default = false, ContextInterface $context = null)
-    {
-        // get current REG_Status
-        $old_STS_ID = $this->status_ID();
-        // if status has changed
-        if (
-            $old_STS_ID !== $new_STS_ID // and that status has actually changed
-            && ! empty($old_STS_ID) // and that old status is actually set
-            && ! empty($new_STS_ID) // as well as the new status
-            && $this->ID() // ensure registration is in the db
-        ) {
-            // update internal status first
-            parent::set('STS_ID', $new_STS_ID, $use_default);
-            // THEN handle other changes that occur when reg status changes
-            // TO approved
-            if ($new_STS_ID === EEM_Registration::status_id_approved) {
-                // reserve a space by incrementing ticket and datetime sold values
-                $this->reserveRegistrationSpace();
-                do_action('AHEE__EE_Registration__set_status__to_approved', $this, $old_STS_ID, $new_STS_ID, $context);
-                // OR FROM  approved
-            } elseif ($old_STS_ID === EEM_Registration::status_id_approved) {
-                // release a space by decrementing ticket and datetime sold values
-                $this->releaseRegistrationSpace();
-                do_action(
-                    'AHEE__EE_Registration__set_status__from_approved',
-                    $this,
-                    $old_STS_ID,
-                    $new_STS_ID,
-                    $context
-                );
-            }
-            // update status
-            parent::set('STS_ID', $new_STS_ID, $use_default);
-            $this->updateIfCanceledOrReinstated($new_STS_ID, $old_STS_ID, $context);
-            if ($this->statusChangeUpdatesTransaction($context)) {
-                $this->updateTransactionAfterStatusChange();
-            }
-            do_action('AHEE__EE_Registration__set_status__after_update', $this, $old_STS_ID, $new_STS_ID, $context);
-            return true;
-        }
-        // even though the old value matches the new value, it's still good to
-        // allow the parent set method to have a say
-        parent::set('STS_ID', $new_STS_ID, $use_default);
-        return true;
-    }
-
-
-    /**
-     * update REGs and TXN when cancelled or declined registrations involved
-     *
-     * @param string                $new_STS_ID
-     * @param string                $old_STS_ID
-     * @param ContextInterface|null $context
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     */
-    private function updateIfCanceledOrReinstated($new_STS_ID, $old_STS_ID, ContextInterface $context = null)
-    {
-        // these reg statuses should not be considered in any calculations involving monies owing
-        $closed_reg_statuses = EEM_Registration::closed_reg_statuses();
-        // true if registration has been cancelled or declined
-        $this->updateIfCanceled(
-            $closed_reg_statuses,
-            $new_STS_ID,
-            $old_STS_ID,
-            $context
-        );
-        $this->updateIfReinstated(
-            $closed_reg_statuses,
-            $new_STS_ID,
-            $old_STS_ID,
-            $context
-        );
-    }
-
-
-    /**
-     * update REGs and TXN when cancelled or declined registrations involved
-     *
-     * @param array                 $closed_reg_statuses
-     * @param string                $new_STS_ID
-     * @param string                $old_STS_ID
-     * @param ContextInterface|null $context
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     */
-    private function updateIfCanceled(
-        array $closed_reg_statuses,
-        $new_STS_ID,
-        $old_STS_ID,
-        ContextInterface $context = null
-    ) {
-        // true if registration has been cancelled or declined
-        if (
-            in_array($new_STS_ID, $closed_reg_statuses, true)
-            && ! in_array($old_STS_ID, $closed_reg_statuses, true)
-        ) {
-            /** @type EE_Registration_Processor $registration_processor */
-            $registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
-            /** @type EE_Transaction_Processor $transaction_processor */
-            $transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
-            // cancelled or declined registration
-            $registration_processor->update_registration_after_being_canceled_or_declined(
-                $this,
-                $closed_reg_statuses
-            );
-            $transaction_processor->update_transaction_after_canceled_or_declined_registration(
-                $this,
-                $closed_reg_statuses,
-                false
-            );
-            do_action(
-                'AHEE__EE_Registration__set_status__canceled_or_declined',
-                $this,
-                $old_STS_ID,
-                $new_STS_ID,
-                $context
-            );
-            return;
-        }
-    }
-
-
-    /**
-     * update REGs and TXN when cancelled or declined registrations involved
-     *
-     * @param array                 $closed_reg_statuses
-     * @param string                $new_STS_ID
-     * @param string                $old_STS_ID
-     * @param ContextInterface|null $context
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     */
-    private function updateIfReinstated(
-        array $closed_reg_statuses,
-        $new_STS_ID,
-        $old_STS_ID,
-        ContextInterface $context = null
-    ) {
-        // true if reinstating cancelled or declined registration
-        if (
-            in_array($old_STS_ID, $closed_reg_statuses, true)
-            && ! in_array($new_STS_ID, $closed_reg_statuses, true)
-        ) {
-            /** @type EE_Registration_Processor $registration_processor */
-            $registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
-            /** @type EE_Transaction_Processor $transaction_processor */
-            $transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
-            // reinstating cancelled or declined registration
-            $registration_processor->update_canceled_or_declined_registration_after_being_reinstated(
-                $this,
-                $closed_reg_statuses
-            );
-            $transaction_processor->update_transaction_after_reinstating_canceled_registration(
-                $this,
-                $closed_reg_statuses,
-                false
-            );
-            do_action(
-                'AHEE__EE_Registration__set_status__after_reinstated',
-                $this,
-                $old_STS_ID,
-                $new_STS_ID,
-                $context
-            );
-        }
-    }
-
-
-    /**
-     * @param ContextInterface|null $context
-     * @return bool
-     */
-    private function statusChangeUpdatesTransaction(ContextInterface $context = null)
-    {
-        $contexts_that_do_not_update_transaction = (array) apply_filters(
-            'AHEE__EE_Registration__statusChangeUpdatesTransaction__contexts_that_do_not_update_transaction',
-            array('spco_reg_step_attendee_information_process_registrations'),
-            $context,
-            $this
-        );
-        return ! (
-            $context instanceof ContextInterface
-            && in_array($context->slug(), $contexts_that_do_not_update_transaction, true)
-        );
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     */
-    private function updateTransactionAfterStatusChange()
-    {
-        /** @type EE_Transaction_Payments $transaction_payments */
-        $transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
-        $transaction_payments->recalculate_transaction_total($this->transaction(), false);
-        $this->transaction()->update_status_based_on_total_paid();
-    }
-
-
-    /**
-     * get Status ID
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function status_ID()
-    {
-        return $this->get('STS_ID');
-    }
-
-
-    /**
-     * Gets the ticket this registration is for
-     *
-     * @param boolean $include_archived whether to include archived tickets or not.
-     * @return EE_Ticket|EE_Base_Class
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function ticket($include_archived = true)
-    {
-        $query_params = array();
-        if ($include_archived) {
-            $query_params['default_where_conditions'] = 'none';
-        }
-        return $this->get_first_related('Ticket', $query_params);
-    }
-
-
-    /**
-     * Gets the event this registration is for
-     *
-     * @return EE_Event
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function event()
-    {
-        $event = $this->get_first_related('Event');
-        if (! $event instanceof \EE_Event) {
-            throw new EntityNotFoundException('Event ID', $this->event_ID());
-        }
-        return $event;
-    }
-
-
-    /**
-     * Gets the "author" of the registration.  Note that for the purposes of registrations, the author will correspond
-     * with the author of the event this registration is for.
-     *
-     * @since 4.5.0
-     * @return int
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function wp_user()
-    {
-        $event = $this->event();
-        if ($event instanceof EE_Event) {
-            return $event->wp_user();
-        }
-        return 0;
-    }
-
-
-    /**
-     * increments this registration's related ticket sold and corresponding datetime sold values
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws UnexpectedEntityException
-     */
-    private function reserveRegistrationSpace()
-    {
-        // reserved ticket and datetime counts will be decremented as sold counts are incremented
-        // so stop tracking that this reg has a ticket reserved
-        $this->release_reserved_ticket(false, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
-        $ticket = $this->ticket();
-        $ticket->increaseSold();
-        // possibly set event status to sold out
-        $this->event()->perform_sold_out_status_check();
-    }
-
-
-    /**
-     * decrements (subtracts) this registration's related ticket sold and corresponding datetime sold values
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws UnexpectedEntityException
-     */
-    private function releaseRegistrationSpace()
-    {
-        $ticket = $this->ticket();
-        $ticket->decreaseSold();
-        // possibly change event status from sold out back to previous status
-        $this->event()->perform_sold_out_status_check();
-    }
-
-
-    /**
-     * tracks this registration's ticket reservation in extra meta
-     * and can increment related ticket reserved and corresponding datetime reserved values
-     *
-     * @param bool   $update_ticket if true, will increment ticket and datetime reserved count
-     * @param string $source
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function reserve_ticket($update_ticket = false, $source = 'unknown')
-    {
-        // only reserve ticket if space is not currently reserved
-        if ((bool) $this->get_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true) !== true) {
-            $reserved = $this->update_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true);
-            if ($reserved && $update_ticket) {
-                $ticket = $this->ticket();
-                $ticket->increaseReserved(1, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
-                $this->update_extra_meta('reserve_ticket', "{$this->ticket_ID()} from {$source}");
-                $ticket->save();
-            }
-        }
-    }
-
-
-    /**
-     * stops tracking this registration's ticket reservation in extra meta
-     * decrements (subtracts) related ticket reserved and corresponding datetime reserved values
-     *
-     * @param bool   $update_ticket if true, will decrement ticket and datetime reserved count
-     * @param string $source
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function release_reserved_ticket($update_ticket = false, $source = 'unknown')
-    {
-        // only release ticket if space is currently reserved
-        if ((bool) $this->get_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true) === true) {
-            $reserved = $this->update_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, false);
-            if ($reserved && $update_ticket) {
-                $ticket = $this->ticket();
-                $ticket->decreaseReserved(1, true, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
-                $this->update_extra_meta('release_reserved_ticket', "{$this->ticket_ID()} from {$source}");
-            }
-        }
-    }
-
-
-    /**
-     * Set Attendee ID
-     *
-     * @param        int $ATT_ID Attendee ID
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_attendee_id($ATT_ID = 0)
-    {
-        $this->set('ATT_ID', $ATT_ID);
-    }
-
-
-    /**
-     *        Set Transaction ID
-     *
-     * @param        int $TXN_ID Transaction ID
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_transaction_id($TXN_ID = 0)
-    {
-        $this->set('TXN_ID', $TXN_ID);
-    }
-
-
-    /**
-     *        Set Session
-     *
-     * @param    string $REG_session PHP Session ID
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_session($REG_session = '')
-    {
-        $this->set('REG_session', $REG_session);
-    }
-
-
-    /**
-     *        Set Registration URL Link
-     *
-     * @param    string $REG_url_link Registration URL Link
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_reg_url_link($REG_url_link = '')
-    {
-        $this->set('REG_url_link', $REG_url_link);
-    }
-
-
-    /**
-     *        Set Attendee Counter
-     *
-     * @param        int $REG_count Primary Attendee
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_count($REG_count = 1)
-    {
-        $this->set('REG_count', $REG_count);
-    }
-
-
-    /**
-     *        Set Group Size
-     *
-     * @param        boolean $REG_group_size Group Registration
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_group_size($REG_group_size = false)
-    {
-        $this->set('REG_group_size', $REG_group_size);
-    }
-
-
-    /**
-     *    is_not_approved -  convenience method that returns TRUE if REG status ID ==
-     *    EEM_Registration::status_id_not_approved
-     *
-     * @return        boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_not_approved()
-    {
-        return $this->status_ID() === EEM_Registration::status_id_not_approved;
-    }
-
-
-    /**
-     *    is_pending_payment -  convenience method that returns TRUE if REG status ID ==
-     *    EEM_Registration::status_id_pending_payment
-     *
-     * @return        boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_pending_payment()
-    {
-        return $this->status_ID() === EEM_Registration::status_id_pending_payment;
-    }
-
-
-    /**
-     *    is_approved -  convenience method that returns TRUE if REG status ID == EEM_Registration::status_id_approved
-     *
-     * @return        boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_approved()
-    {
-        return $this->status_ID() === EEM_Registration::status_id_approved;
-    }
-
-
-    /**
-     *    is_cancelled -  convenience method that returns TRUE if REG status ID == EEM_Registration::status_id_cancelled
-     *
-     * @return        boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_cancelled()
-    {
-        return $this->status_ID() === EEM_Registration::status_id_cancelled;
-    }
-
-
-    /**
-     *    is_declined -  convenience method that returns TRUE if REG status ID == EEM_Registration::status_id_declined
-     *
-     * @return        boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_declined()
-    {
-        return $this->status_ID() === EEM_Registration::status_id_declined;
-    }
-
-
-    /**
-     *    is_incomplete -  convenience method that returns TRUE if REG status ID ==
-     *    EEM_Registration::status_id_incomplete
-     *
-     * @return        boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_incomplete()
-    {
-        return $this->status_ID() === EEM_Registration::status_id_incomplete;
-    }
-
-
-    /**
-     *        Set Registration Date
-     *
-     * @param        mixed ( int or string ) $REG_date Registration Date - Unix timestamp or string representation of
-     *                                                 Date
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_reg_date($REG_date = false)
-    {
-        $this->set('REG_date', $REG_date);
-    }
-
-
-    /**
-     *    Set final price owing for this registration after all ticket/price modifications
-     *
-     * @param    float $REG_final_price
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_final_price($REG_final_price = 0.00)
-    {
-        $this->set('REG_final_price', $REG_final_price);
-    }
-
-
-    /**
-     *    Set amount paid towards this registration's final price
-     *
-     * @param    float $REG_paid
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_paid($REG_paid = 0.00)
-    {
-        $this->set('REG_paid', $REG_paid);
-    }
-
-
-    /**
-     *        Attendee Is Going
-     *
-     * @param        boolean $REG_att_is_going Attendee Is Going
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_att_is_going($REG_att_is_going = false)
-    {
-        $this->set('REG_att_is_going', $REG_att_is_going);
-    }
-
-
-    /**
-     * Gets the related attendee
-     *
-     * @return EE_Attendee|EE_Base_Class
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function attendee()
-    {
-        return $this->get_first_related('Attendee');
-    }
-
-    /**
-     * Gets the name of the attendee.
-     * @since 4.10.12.p
-     * @param bool $apply_html_entities set to true if you want to use HTML entities.
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function attendeeName($apply_html_entities = false)
-    {
-        $attendee = $this->get_first_related('Attendee');
-        if ($attendee instanceof EE_Attendee) {
-            $attendee_name = $attendee->full_name($apply_html_entities);
-        } else {
-            $attendee_name = esc_html__('Unknown', 'event_espresso');
-        }
-        return $attendee_name;
-    }
-
-
-    /**
-     *        get Event ID
-     */
-    public function event_ID()
-    {
-        return $this->get('EVT_ID');
-    }
-
-
-    /**
-     *        get Event ID
-     */
-    public function event_name()
-    {
-        $event = $this->event_obj();
-        if ($event) {
-            return $event->name();
-        } else {
-            return null;
-        }
-    }
-
-
-    /**
-     * Fetches the event this registration is for
-     *
-     * @return EE_Base_Class|EE_Event
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function event_obj()
-    {
-        return $this->get_first_related('Event');
-    }
-
-
-    /**
-     *        get Attendee ID
-     */
-    public function attendee_ID()
-    {
-        return $this->get('ATT_ID');
-    }
-
-
-    /**
-     *        get PHP Session ID
-     */
-    public function session_ID()
-    {
-        return $this->get('REG_session');
-    }
-
-
-    /**
-     * Gets the string which represents the URL trigger for the receipt template in the message template system.
-     *
-     * @param string $messenger 'pdf' or 'html'.  Default 'html'.
-     * @return string
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function receipt_url($messenger = 'html')
-    {
-
-        /**
-         * The below will be deprecated one version after this.  We check first if there is a custom receipt template
-         * already in use on old system.  If there is then we just return the standard url for it.
-         *
-         * @since 4.5.0
-         */
-        $template_relative_path = 'modules/gateways/Invoice/lib/templates/receipt_body.template.php';
-        $has_custom = EEH_Template::locate_template(
-            $template_relative_path,
-            array(),
-            true,
-            true,
-            true
-        );
-
-        if ($has_custom) {
-            return add_query_arg(array('receipt' => 'true'), $this->invoice_url('launch'));
-        }
-        return apply_filters('FHEE__EE_Registration__receipt_url__receipt_url', '', $this, $messenger, 'receipt');
-    }
-
-
-    /**
-     * Gets the string which represents the URL trigger for the invoice template in the message template system.
-     *
-     * @param string $messenger 'pdf' or 'html'.  Default 'html'.
-     * @return string
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function invoice_url($messenger = 'html')
-    {
-        /**
-         * The below will be deprecated one version after this.  We check first if there is a custom invoice template
-         * already in use on old system.  If there is then we just return the standard url for it.
-         *
-         * @since 4.5.0
-         */
-        $template_relative_path = 'modules/gateways/Invoice/lib/templates/invoice_body.template.php';
-        $has_custom = EEH_Template::locate_template(
-            $template_relative_path,
-            array(),
-            true,
-            true,
-            true
-        );
-
-        if ($has_custom) {
-            if ($messenger == 'html') {
-                return $this->invoice_url('launch');
-            }
-            $route = $messenger == 'download' || $messenger == 'pdf' ? 'download_invoice' : 'launch_invoice';
-
-            $query_args = array('ee' => $route, 'id' => $this->reg_url_link());
-            if ($messenger == 'html') {
-                $query_args['html'] = true;
-            }
-            return add_query_arg($query_args, get_permalink(EE_Registry::instance()->CFG->core->thank_you_page_id));
-        }
-        return apply_filters('FHEE__EE_Registration__invoice_url__invoice_url', '', $this, $messenger, 'invoice');
-    }
-
-
-    /**
-     * get Registration URL Link
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function reg_url_link()
-    {
-        return (string) $this->get('REG_url_link');
-    }
-
-
-    /**
-     * Echoes out invoice_url()
-     *
-     * @param string $type 'download','launch', or 'html' (default is 'launch')
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function e_invoice_url($type = 'launch')
-    {
-        echo esc_url_raw($this->invoice_url($type));
-    }
-
-
-    /**
-     * Echoes out payment_overview_url
-     */
-    public function e_payment_overview_url()
-    {
-        echo esc_url_raw($this->payment_overview_url());
-    }
-
-
-    /**
-     * Gets the URL for the checkout payment options reg step
-     * with this registration's REG_url_link added as a query parameter
-     *
-     * @param bool $clear_session Set to true when you want to clear the session on revisiting the
-     *                            payment overview url.
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function payment_overview_url($clear_session = false)
-    {
-        return add_query_arg(
-            (array) apply_filters(
-                'FHEE__EE_Registration__payment_overview_url__query_args',
-                array(
-                    'e_reg_url_link' => $this->reg_url_link(),
-                    'step'           => 'payment_options',
-                    'revisit'        => true,
-                    'clear_session'  => (bool) $clear_session,
-                ),
-                $this
-            ),
-            EE_Registry::instance()->CFG->core->reg_page_url()
-        );
-    }
-
-
-    /**
-     * Gets the URL for the checkout attendee information reg step
-     * with this registration's REG_url_link added as a query parameter
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function edit_attendee_information_url()
-    {
-        return add_query_arg(
-            (array) apply_filters(
-                'FHEE__EE_Registration__edit_attendee_information_url__query_args',
-                array(
-                    'e_reg_url_link' => $this->reg_url_link(),
-                    'step'           => 'attendee_information',
-                    'revisit'        => true,
-                ),
-                $this
-            ),
-            EE_Registry::instance()->CFG->core->reg_page_url()
-        );
-    }
-
-
-    /**
-     * Simply generates and returns the appropriate admin_url link to edit this registration
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_admin_edit_url()
-    {
-        return EEH_URL::add_query_args_and_nonce(
-            array(
-                'page'    => 'espresso_registrations',
-                'action'  => 'view_registration',
-                '_REG_ID' => $this->ID(),
-            ),
-            admin_url('admin.php')
-        );
-    }
-
-
-    /**
-     * is_primary_registrant?
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_primary_registrant()
-    {
-        return (int) $this->get('REG_count') === 1;
-    }
-
-
-    /**
-     * This returns the primary registration object for this registration group (which may be this object).
-     *
-     * @return EE_Registration
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_primary_registration()
-    {
-        if ($this->is_primary_registrant()) {
-            return $this;
-        }
-
-        // k reg_count !== 1 so let's get the EE_Registration object matching this txn_id and reg_count == 1
-        /** @var EE_Registration $primary_registrant */
-        $primary_registrant = EEM_Registration::instance()->get_one(
-            array(
-                array(
-                    'TXN_ID'    => $this->transaction_ID(),
-                    'REG_count' => 1,
-                ),
-            )
-        );
-        return $primary_registrant;
-    }
-
-
-    /**
-     * get  Attendee Number
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function count()
-    {
-        return $this->get('REG_count');
-    }
-
-
-    /**
-     * get Group Size
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function group_size()
-    {
-        return $this->get('REG_group_size');
-    }
-
-
-    /**
-     * get Registration Date
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function date()
-    {
-        return $this->get('REG_date');
-    }
-
-
-    /**
-     * gets a pretty date
-     *
-     * @param string $date_format
-     * @param string $time_format
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_date($date_format = null, $time_format = null)
-    {
-        return $this->get_datetime('REG_date', $date_format, $time_format);
-    }
-
-
-    /**
-     * final_price
-     * the registration's share of the transaction total, so that the
-     * sum of all the transaction's REG_final_prices equal the transaction's total
-     *
-     * @return float
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function final_price()
-    {
-        return $this->get('REG_final_price');
-    }
-
-
-    /**
-     * pretty_final_price
-     *  final price as formatted string, with correct decimal places and currency symbol
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_final_price()
-    {
-        return $this->get_pretty('REG_final_price');
-    }
-
-
-    /**
-     * get paid (yeah)
-     *
-     * @return float
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function paid()
-    {
-        return $this->get('REG_paid');
-    }
-
-
-    /**
-     * pretty_paid
-     *
-     * @return float
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_paid()
-    {
-        return $this->get_pretty('REG_paid');
-    }
-
-
-    /**
-     * owes_monies_and_can_pay
-     * whether or not this registration has monies owing and it's' status allows payment
-     *
-     * @param array $requires_payment
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function owes_monies_and_can_pay($requires_payment = array())
-    {
-        // these reg statuses require payment (if event is not free)
-        $requires_payment = ! empty($requires_payment)
-            ? $requires_payment
-            : EEM_Registration::reg_statuses_that_allow_payment();
-        if (
-            $this->final_price() !== 0 &&
-            $this->final_price() !== $this->paid() &&
-            in_array($this->status_ID(), $requires_payment)
-        ) {
-            return true;
-        }
-        return false;
-    }
-
-
-    /**
-     * Prints out the return value of $this->pretty_status()
-     *
-     * @param bool $show_icons
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function e_pretty_status($show_icons = false)
-    {
-        echo wp_kses($this->pretty_status($show_icons), AllowedTags::getAllowedTags());
-    }
-
-
-    /**
-     * Returns a nice version of the status for displaying to customers
-     *
-     * @param bool $show_icons
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_status($show_icons = false)
-    {
-        $status = EEM_Status::instance()->localized_status(
-            array($this->status_ID() => esc_html__('unknown', 'event_espresso')),
-            false,
-            'sentence'
-        );
-        $icon = '';
-        switch ($this->status_ID()) {
-            case EEM_Registration::status_id_approved:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-star-filled ee-icon-size-16 green-text"></span>'
-                    : '';
-                break;
-            case EEM_Registration::status_id_pending_payment:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-star-half ee-icon-size-16 orange-text"></span>'
-                    : '';
-                break;
-            case EEM_Registration::status_id_not_approved:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-marker ee-icon-size-16 orange-text"></span>'
-                    : '';
-                break;
-            case EEM_Registration::status_id_cancelled:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-no ee-icon-size-16 lt-grey-text"></span>'
-                    : '';
-                break;
-            case EEM_Registration::status_id_incomplete:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-no ee-icon-size-16 lt-orange-text"></span>'
-                    : '';
-                break;
-            case EEM_Registration::status_id_declined:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-no ee-icon-size-16 red-text"></span>'
-                    : '';
-                break;
-            case EEM_Registration::status_id_wait_list:
-                $icon = $show_icons
-                    ? '<span class="dashicons dashicons-clipboard ee-icon-size-16 purple-text"></span>'
-                    : '';
-                break;
-        }
-        return $icon . $status[ $this->status_ID() ];
-    }
-
-
-    /**
-     *        get Attendee Is Going
-     */
-    public function att_is_going()
-    {
-        return $this->get('REG_att_is_going');
-    }
-
-
-    /**
-     * Gets related answers
-     *
-     * @param array $query_params @see
-     *                            https://github.com/eventespresso/event-espresso-core/tree/master/docs/G--Model-System/model-query-params.md
-     * @return EE_Answer[]|EE_Base_Class[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function answers($query_params = null)
-    {
-        return $this->get_many_related('Answer', $query_params);
-    }
-
-
-    /**
-     * Gets the registration's answer value to the specified question
-     * (either the question's ID or a question object)
-     *
-     * @param EE_Question|int $question
-     * @param bool            $pretty_value
-     * @return array|string if pretty_value= true, the result will always be a string
-     * (because the answer might be an array of answer values, so passing pretty_value=true
-     * will convert it into some kind of string)
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function answer_value_to_question($question, $pretty_value = true)
-    {
-        $question_id = EEM_Question::instance()->ensure_is_ID($question);
-        return EEM_Answer::instance()->get_answer_value_to_question($this, $question_id, $pretty_value);
-    }
-
-
-    /**
-     * question_groups
-     * returns an array of EE_Question_Group objects for this registration
-     *
-     * @return EE_Question_Group[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function question_groups()
-    {
-        return EEM_Event::instance()->get_question_groups_for_event($this->event_ID(), $this);
-    }
-
-
-    /**
-     * count_question_groups
-     * returns a count of the number of EE_Question_Group objects for this registration
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function count_question_groups()
-    {
-        return EEM_Event::instance()->count_related(
-            $this->event_ID(),
-            'Question_Group',
-            [
-                [
-                    'Event_Question_Group.'
-                    . EEM_Event_Question_Group::instance()->fieldNameForContext($this->is_primary_registrant()) => true,
-                ]
-            ]
-        );
-    }
-
-
-    /**
-     * Returns the registration date in the 'standard' string format
-     * (function may be improved in the future to allow for different formats and timezones)
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function reg_date()
-    {
-        return $this->get_datetime('REG_date');
-    }
-
-
-    /**
-     * Gets the datetime-ticket for this registration (ie, it can be used to isolate
-     * the ticket this registration purchased, or the datetime they have registered
-     * to attend)
-     *
-     * @return EE_Base_Class|EE_Datetime_Ticket
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function datetime_ticket()
-    {
-        return $this->get_first_related('Datetime_Ticket');
-    }
-
-
-    /**
-     * Sets the registration's datetime_ticket.
-     *
-     * @param EE_Datetime_Ticket $datetime_ticket
-     * @return EE_Base_Class|EE_Datetime_Ticket
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_datetime_ticket($datetime_ticket)
-    {
-        return $this->_add_relation_to($datetime_ticket, 'Datetime_Ticket');
-    }
-
-
-    /**
-     * Gets deleted
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function deleted()
-    {
-        return $this->get('REG_deleted');
-    }
-
-
-    /**
-     * Sets deleted
-     *
-     * @param boolean $deleted
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function set_deleted($deleted)
-    {
-        if ($deleted) {
-            $this->delete();
-        } else {
-            $this->restore();
-        }
-    }
-
-
-    /**
-     * Get the status object of this object
-     *
-     * @return EE_Base_Class|EE_Status
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function status_obj()
-    {
-        return $this->get_first_related('Status');
-    }
-
-
-    /**
-     * Returns the number of times this registration has checked into any of the datetimes
-     * its available for
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function count_checkins()
-    {
-        return $this->get_model()->count_related($this, 'Checkin');
-    }
-
-
-    /**
-     * Returns the number of current Check-ins this registration is checked into for any of the datetimes the
-     * registration is for.  Note, this is ONLY checked in (does not include checkedout)
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function count_checkins_not_checkedout()
-    {
-        return $this->get_model()->count_related($this, 'Checkin', array(array('CHK_in' => 1)));
-    }
-
-
-    /**
-     * The purpose of this method is simply to check whether this registration can checkin to the given datetime.
-     *
-     * @param int | EE_Datetime $DTT_OR_ID      The datetime the registration is being checked against
-     * @param bool              $check_approved This is used to indicate whether the caller wants can_checkin to also
-     *                                          consider registration status as well as datetime access.
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function can_checkin($DTT_OR_ID, $check_approved = true)
-    {
-        $DTT_ID = EEM_Datetime::instance()->ensure_is_ID($DTT_OR_ID);
-        // first check registration status
-        if (! $DTT_ID || ($check_approved && ! $this->is_approved())) {
-            return false;
-        }
-        // is there a datetime ticket that matches this dtt_ID?
-        if (
-            ! (EEM_Datetime_Ticket::instance()->exists(
-                array(
-                    array(
-                        'TKT_ID' => $this->get('TKT_ID'),
-                        'DTT_ID' => $DTT_ID,
-                    ),
-                )
-            ))
-        ) {
-            return false;
-        }
-
-        // final check is against TKT_uses
-        return $this->verify_can_checkin_against_TKT_uses($DTT_ID);
-    }
-
-
-    /**
-     * This method verifies whether the user can checkin for the given datetime considering the max uses value set on
-     * the ticket. To do this,  a query is done to get the count of the datetime records already checked into.  If the
-     * datetime given does not have a check-in record and checking in for that datetime will exceed the allowed uses,
-     * then return false.  Otherwise return true.
-     *
-     * @param int | EE_Datetime $DTT_OR_ID The datetime the registration is being checked against
-     * @return bool true means can checkin.  false means cannot checkin.
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function verify_can_checkin_against_TKT_uses($DTT_OR_ID)
-    {
-        $DTT_ID = EEM_Datetime::instance()->ensure_is_ID($DTT_OR_ID);
-
-        if (! $DTT_ID) {
-            return false;
-        }
-
-        $max_uses = $this->ticket() instanceof EE_Ticket ? $this->ticket()->uses() : EE_INF;
-
-        // if max uses is not set or equals infinity then return true cause its not a factor for whether user can
-        // check-in or not.
-        if (! $max_uses || $max_uses === EE_INF) {
-            return true;
-        }
-
-        // does this datetime have a checkin record?  If so, then the dtt count has already been verified so we can just
-        // go ahead and toggle.
-        if (EEM_Checkin::instance()->exists(array(array('REG_ID' => $this->ID(), 'DTT_ID' => $DTT_ID)))) {
-            return true;
-        }
-
-        // made it here so the last check is whether the number of checkins per unique datetime on this registration
-        // disallows further check-ins.
-        $count_unique_dtt_checkins = EEM_Checkin::instance()->count(
-            array(
-                array(
-                    'REG_ID' => $this->ID(),
-                    'CHK_in' => true,
-                ),
-            ),
-            'DTT_ID',
-            true
-        );
-        // checkins have already reached their max number of uses
-        // so registrant can NOT checkin
-        if ($count_unique_dtt_checkins >= $max_uses) {
-            EE_Error::add_error(
-                esc_html__(
-                    'Check-in denied because number of datetime uses for the ticket has been reached or exceeded.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return false;
-        }
-        return true;
-    }
-
-
-    /**
-     * toggle Check-in status for this registration
-     * Check-ins are toggled in the following order:
-     * never checked in -> checked in
-     * checked in -> checked out
-     * checked out -> checked in
-     *
-     * @param  int $DTT_ID  include specific datetime to toggle Check-in for.
-     *                      If not included or null, then it is assumed latest datetime is being toggled.
-     * @param bool $verify  If true then can_checkin() is used to verify whether the person
-     *                      can be checked in or not.  Otherwise this forces change in checkin status.
-     * @return bool|int     the chk_in status toggled to OR false if nothing got changed.
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function toggle_checkin_status($DTT_ID = null, $verify = false)
-    {
-        if (empty($DTT_ID)) {
-            $datetime = $this->get_latest_related_datetime();
-            $DTT_ID = $datetime instanceof EE_Datetime ? $datetime->ID() : 0;
-            // verify the registration can checkin for the given DTT_ID
-        } elseif (! $this->can_checkin($DTT_ID, $verify)) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'The given registration (ID:%1$d) can not be checked in to the given DTT_ID (%2$d), because the registration does not have access',
-                        'event_espresso'
-                    ),
-                    $this->ID(),
-                    $DTT_ID
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return false;
-        }
-        $status_paths = array(
-            EE_Checkin::status_checked_never => EE_Checkin::status_checked_in,
-            EE_Checkin::status_checked_in    => EE_Checkin::status_checked_out,
-            EE_Checkin::status_checked_out   => EE_Checkin::status_checked_in,
-        );
-        // start by getting the current status so we know what status we'll be changing to.
-        $cur_status = $this->check_in_status_for_datetime($DTT_ID);
-        $status_to = $status_paths[ $cur_status ];
-        // database only records true for checked IN or false for checked OUT
-        // no record ( null ) means checked in NEVER, but we obviously don't save that
-        $new_status = $status_to === EE_Checkin::status_checked_in;
-        // add relation - note Check-ins are always creating new rows
-        // because we are keeping track of Check-ins over time.
-        // Eventually we'll probably want to show a list table
-        // for the individual Check-ins so that they can be managed.
-        $checkin = EE_Checkin::new_instance(
-            array(
-                'REG_ID' => $this->ID(),
-                'DTT_ID' => $DTT_ID,
-                'CHK_in' => $new_status,
-            )
-        );
-        // if the record could not be saved then return false
-        if ($checkin->save() === 0) {
-            if (WP_DEBUG) {
-                global $wpdb;
-                $error = sprintf(
-                    esc_html__(
-                        'Registration check in update failed because of the following database error: %1$s%2$s',
-                        'event_espresso'
-                    ),
-                    '<br />',
-                    $wpdb->last_error
-                );
-            } else {
-                $error = esc_html__(
-                    'Registration check in update failed because of an unknown database error',
-                    'event_espresso'
-                );
-            }
-            EE_Error::add_error($error, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-        // Fire a checked_in and checkout_out action.
-        $checked_status = $status_to === EE_Checkin::status_checked_in ? 'checked_in' : 'checked_out';
-        do_action("AHEE__EE_Registration__toggle_checkin_status__{$checked_status}", $this, $DTT_ID);
-        return $status_to;
-    }
-
-
-    /**
-     * Returns the latest datetime related to this registration (via the ticket attached to the registration).
-     * "Latest" is defined by the `DTT_EVT_start` column.
-     *
-     * @return EE_Datetime|null
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_latest_related_datetime()
-    {
-        return EEM_Datetime::instance()->get_one(
-            array(
-                array(
-                    'Ticket.Registration.REG_ID' => $this->ID(),
-                ),
-                'order_by' => array('DTT_EVT_start' => 'DESC'),
-            )
-        );
-    }
-
-
-    /**
-     * Returns the earliest datetime related to this registration (via the ticket attached to the registration).
-     * "Earliest" is defined by the `DTT_EVT_start` column.
-     *
-     * @return EE_Base_Class|EE_Soft_Delete_Base_Class|NULL
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_earliest_related_datetime()
-    {
-        return EEM_Datetime::instance()->get_one(
-            array(
-                array(
-                    'Ticket.Registration.REG_ID' => $this->ID(),
-                ),
-                'order_by' => array('DTT_EVT_start' => 'ASC'),
-            )
-        );
-    }
-
-
-    /**
-     * This method simply returns the check-in status for this registration and the given datetime.
-     * If neither the datetime nor the checkin values are provided as arguments,
-     * then this will return the LATEST check-in status for the registration across all datetimes it belongs to.
-     *
-     * @param  int       $DTT_ID  The ID of the datetime we're checking against
-     *                            (if empty we'll get the primary datetime for
-     *                            this registration (via event) and use it's ID);
-     * @param EE_Checkin $checkin If present, we use the given checkin object rather than the dtt_id.
-     * @return int                Integer representing Check-in status.
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function check_in_status_for_datetime($DTT_ID = 0, $checkin = null)
-    {
-        $checkin_query_params = array(
-            'order_by' => array('CHK_timestamp' => 'DESC'),
-        );
-
-        if ($DTT_ID > 0) {
-            $checkin_query_params[0] = array('DTT_ID' => $DTT_ID);
-        }
-
-        // get checkin object (if exists)
-        $checkin = $checkin instanceof EE_Checkin
-            ? $checkin
-            : $this->get_first_related('Checkin', $checkin_query_params);
-        if ($checkin instanceof EE_Checkin) {
-            if ($checkin->get('CHK_in')) {
-                return EE_Checkin::status_checked_in; // checked in
-            }
-            return EE_Checkin::status_checked_out; // had checked in but is now checked out.
-        }
-        return EE_Checkin::status_checked_never; // never been checked in
-    }
-
-
-    /**
-     * This method returns a localized message for the toggled Check-in message.
-     *
-     * @param  int $DTT_ID include specific datetime to get the correct Check-in message.  If not included or null,
-     *                     then it is assumed Check-in for primary datetime was toggled.
-     * @param bool $error  This just flags that you want an error message returned. This is put in so that the error
-     *                     message can be customized with the attendee name.
-     * @return string internationalized message
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_checkin_msg($DTT_ID, $error = false)
-    {
-        // let's get the attendee first so we can include the name of the attendee
-        $attendee = $this->get_first_related('Attendee');
-        if ($attendee instanceof EE_Attendee) {
-            if ($error) {
-                return sprintf(
-                    esc_html__("%s's check-in status was not changed.", "event_espresso"),
-                    $attendee->full_name()
-                );
-            }
-            $cur_status = $this->check_in_status_for_datetime($DTT_ID);
-            // what is the status message going to be?
-            switch ($cur_status) {
-                case EE_Checkin::status_checked_never:
-                    return sprintf(
-                        esc_html__('%s has been removed from Check-in records', 'event_espresso'),
-                        $attendee->full_name()
-                    );
-                    break;
-                case EE_Checkin::status_checked_in:
-                    return sprintf(esc_html__('%s has been checked in', 'event_espresso'), $attendee->full_name());
-                    break;
-                case EE_Checkin::status_checked_out:
-                    return sprintf(esc_html__('%s has been checked out', 'event_espresso'), $attendee->full_name());
-                    break;
-            }
-        }
-        return esc_html__('The check-in status could not be determined.', 'event_espresso');
-    }
-
-
-    /**
-     * Returns the related EE_Transaction to this registration
-     *
-     * @return EE_Transaction
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function transaction()
-    {
-        $transaction = $this->get_first_related('Transaction');
-        if (! $transaction instanceof \EE_Transaction) {
-            throw new EntityNotFoundException('Transaction ID', $this->transaction_ID());
-        }
-        return $transaction;
-    }
-
-
-    /**
-     * get Registration Code
-     *
-     * @return mixed
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function reg_code()
-    {
-        return $this->get('REG_code');
-    }
-
-
-    /**
-     * @return mixed
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function transaction_ID()
-    {
-        return $this->get('TXN_ID');
-    }
-
-
-    /**
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function ticket_ID()
-    {
-        return $this->get('TKT_ID');
-    }
-
-
-    /**
-     * Set Registration Code
-     *
-     * @param    string  $REG_code Registration Code
-     * @param    boolean $use_default
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_reg_code($REG_code, $use_default = false)
-    {
-        if (empty($REG_code)) {
-            EE_Error::add_error(
-                esc_html__('REG_code can not be empty.', 'event_espresso'),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return;
-        }
-        if (! $this->reg_code()) {
-            parent::set('REG_code', $REG_code, $use_default);
-        } else {
-            EE_Error::doing_it_wrong(
-                __CLASS__ . '::' . __FUNCTION__,
-                esc_html__('Can not change a registration REG_code once it has been set.', 'event_espresso'),
-                '4.6.0'
-            );
-        }
-    }
-
-
-    /**
-     * Returns all other registrations in the same group as this registrant who have the same ticket option.
-     * Note, if you want to just get all registrations in the same transaction (group), use:
-     *    $registration->transaction()->registrations();
-     *
-     * @since 4.5.0
-     * @return EE_Registration[] or empty array if this isn't a group registration.
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_all_other_registrations_in_group()
-    {
-        if ($this->group_size() < 2) {
-            return array();
-        }
-
-        $query[0] = array(
-            'TXN_ID' => $this->transaction_ID(),
-            'REG_ID' => array('!=', $this->ID()),
-            'TKT_ID' => $this->ticket_ID(),
-        );
-        /** @var EE_Registration[] $registrations */
-        $registrations = $this->get_model()->get_all($query);
-        return $registrations;
-    }
-
-
-    /**
-     * Return the link to the admin details for the object.
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_admin_details_link()
-    {
-        EE_Registry::instance()->load_helper('URL');
-        return EEH_URL::add_query_args_and_nonce(
-            array(
-                'page'    => 'espresso_registrations',
-                'action'  => 'view_registration',
-                '_REG_ID' => $this->ID(),
-            ),
-            admin_url('admin.php')
-        );
-    }
-
-
-    /**
-     * Returns the link to the editor for the object.  Sometimes this is the same as the details.
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_admin_edit_link()
-    {
-        return $this->get_admin_details_link();
-    }
-
-
-    /**
-     * Returns the link to a settings page for the object.
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_admin_settings_link()
-    {
-        return $this->get_admin_details_link();
-    }
-
-
-    /**
-     * Returns the link to the "overview" for the object (typically the "list table" view).
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_admin_overview_link()
-    {
-        EE_Registry::instance()->load_helper('URL');
-        return EEH_URL::add_query_args_and_nonce(
-            array(
-                'page' => 'espresso_registrations',
-            ),
-            admin_url('admin.php')
-        );
-    }
-
-
-    /**
-     * @param array $query_params
-     * @return EE_Base_Class[]|EE_Registration[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function payments($query_params = array())
-    {
-        return $this->get_many_related('Payment', $query_params);
-    }
-
-
-    /**
-     * @param array $query_params
-     * @return EE_Base_Class[]|EE_Registration_Payment[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function registration_payments($query_params = array())
-    {
-        return $this->get_many_related('Registration_Payment', $query_params);
-    }
-
-
-    /**
-     * This grabs the payment method corresponding to the last payment made for the amount owing on the registration.
-     * Note: if there are no payments on the registration there will be no payment method returned.
-     *
-     * @return EE_Payment|EE_Payment_Method|null
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function payment_method()
-    {
-        return EEM_Payment_Method::instance()->get_last_used_for_registration($this);
-    }
-
-
-    /**
-     * @return \EE_Line_Item
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function ticket_line_item()
-    {
-        $ticket = $this->ticket();
-        $transaction = $this->transaction();
-        $line_item = null;
-        $ticket_line_items = \EEH_Line_Item::get_line_items_by_object_type_and_IDs(
-            $transaction->total_line_item(),
-            'Ticket',
-            array($ticket->ID())
-        );
-        foreach ($ticket_line_items as $ticket_line_item) {
-            if (
-                $ticket_line_item instanceof \EE_Line_Item
-                && $ticket_line_item->OBJ_type() === 'Ticket'
-                && $ticket_line_item->OBJ_ID() === $ticket->ID()
-            ) {
-                $line_item = $ticket_line_item;
-                break;
-            }
-        }
-        if (! ($line_item instanceof \EE_Line_Item && $line_item->OBJ_type() === 'Ticket')) {
-            throw new EntityNotFoundException('Line Item Ticket ID', $ticket->ID());
-        }
-        return $line_item;
-    }
-
-
-    /**
-     * Soft Deletes this model object.
-     *
-     * @param string $source function name that called this method
-     * @return boolean | int
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function delete()
-    {
-        if ($this->update_extra_meta(EE_Registration::PRE_TRASH_REG_STATUS_KEY, $this->status_ID()) === true) {
-            $this->set_status(EEM_Registration::status_id_cancelled);
-        }
-        return parent::delete();
-    }
-
-
-    /**
-     * Restores whatever the previous status was on a registration before it was trashed (if possible)
-     *
-     * @param string $source function name that called this method
-     * @return bool|int
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function restore()
-    {
-        $previous_status = $this->get_extra_meta(
-            EE_Registration::PRE_TRASH_REG_STATUS_KEY,
-            true,
-            EEM_Registration::status_id_cancelled
-        );
-        if ($previous_status) {
-            $this->delete_extra_meta(EE_Registration::PRE_TRASH_REG_STATUS_KEY);
-            $this->set_status($previous_status);
-        }
-        return parent::restore();
-    }
-
-
-    /**
-     * possibly toggle Registration status based on comparison of REG_paid vs REG_final_price
-     *
-     * @param  boolean $trigger_set_status_logic EE_Registration::set_status() can trigger additional logic
-     *                                           depending on whether the reg status changes to or from "Approved"
-     * @return boolean whether the Registration status was updated
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws UnexpectedEntityException
-     */
-    public function updateStatusBasedOnTotalPaid($trigger_set_status_logic = true)
-    {
-        $paid = $this->paid();
-        $price = $this->final_price();
-        switch (true) {
-            // overpaid or paid
-            case EEH_Money::compare_floats($paid, $price, '>'):
-            case EEH_Money::compare_floats($paid, $price):
-                $new_status = EEM_Registration::status_id_approved;
-                break;
-            //  underpaid
-            case EEH_Money::compare_floats($paid, $price, '<'):
-                $new_status = EEM_Registration::status_id_pending_payment;
-                break;
-            // uhhh Houston...
-            default:
-                throw new RuntimeException(
-                    esc_html__('The total paid calculation for this registration is inaccurate.', 'event_espresso')
-                );
-        }
-        if ($new_status !== $this->status_ID()) {
-            if ($trigger_set_status_logic) {
-                return $this->set_status($new_status);
-            }
-            parent::set('STS_ID', $new_status);
-            return true;
-        }
-        return false;
-    }
-
-
-    /*************************** DEPRECATED ***************************/
-
-
-    /**
-     * @deprecated
-     * @since     4.7.0
-     */
-    public function price_paid()
-    {
-        EE_Error::doing_it_wrong(
-            'EE_Registration::price_paid()',
-            esc_html__(
-                'This method is deprecated, please use EE_Registration::final_price() instead.',
-                'event_espresso'
-            ),
-            '4.7.0'
-        );
-        return $this->final_price();
-    }
-
-
-    /**
-     * @deprecated
-     * @since     4.7.0
-     * @param    float $REG_final_price
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws DomainException
-     */
-    public function set_price_paid($REG_final_price = 0.00)
-    {
-        EE_Error::doing_it_wrong(
-            'EE_Registration::set_price_paid()',
-            esc_html__(
-                'This method is deprecated, please use EE_Registration::set_final_price() instead.',
-                'event_espresso'
-            ),
-            '4.7.0'
-        );
-        $this->set_final_price($REG_final_price);
-    }
-
-
-    /**
-     * @deprecated
-     * @since 4.7.0
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_price_paid()
-    {
-        EE_Error::doing_it_wrong(
-            'EE_Registration::pretty_price_paid()',
-            esc_html__(
-                'This method is deprecated, please use EE_Registration::pretty_final_price() instead.',
-                'event_espresso'
-            ),
-            '4.7.0'
-        );
-        return $this->pretty_final_price();
-    }
-
-
-    /**
-     * Gets the primary datetime related to this registration via the related Event to this registration
-     *
-     * @deprecated 4.9.17
-     * @return EE_Datetime
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_related_primary_datetime()
-    {
-        EE_Error::doing_it_wrong(
-            __METHOD__,
-            esc_html__(
-                'Use EE_Registration::get_latest_related_datetime() or EE_Registration::get_earliest_related_datetime()',
-                'event_espresso'
-            ),
-            '4.9.17',
-            '5.0.0'
-        );
-        return $this->event()->primary_datetime();
-    }
-
-    /**
-     * Returns the contact's name (or "Unknown" if there is no contact.)
-     * @since 4.10.12.p
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function name()
-    {
-        return $this->attendeeName();
-    }
+	/**
+	 * Used to reference when a registration has never been checked in.
+	 *
+	 * @deprecated use \EE_Checkin::status_checked_never instead
+	 * @type int
+	 */
+	const checkin_status_never = 2;
+
+	/**
+	 * Used to reference when a registration has been checked in.
+	 *
+	 * @deprecated use \EE_Checkin::status_checked_in instead
+	 * @type int
+	 */
+	const checkin_status_in = 1;
+
+	/**
+	 * Used to reference when a registration has been checked out.
+	 *
+	 * @deprecated use \EE_Checkin::status_checked_out instead
+	 * @type int
+	 */
+	const checkin_status_out = 0;
+
+	/**
+	 * extra meta key for tracking reg status os trashed registrations
+	 *
+	 * @type string
+	 */
+	const PRE_TRASH_REG_STATUS_KEY = 'pre_trash_registration_status';
+
+	/**
+	 * extra meta key for tracking if registration has reserved ticket
+	 *
+	 * @type string
+	 */
+	const HAS_RESERVED_TICKET_KEY = 'has_reserved_ticket';
+
+
+	/**
+	 * @param array  $props_n_values          incoming values
+	 * @param string $timezone                incoming timezone (if not set the timezone set for the website will be
+	 *                                        used.)
+	 * @param array  $date_formats            incoming date_formats in an array where the first value is the
+	 *                                        date_format and the second value is the time format
+	 * @return EE_Registration
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public static function new_instance($props_n_values = array(), $timezone = null, $date_formats = array())
+	{
+		$has_object = parent::_check_for_object($props_n_values, __CLASS__, $timezone, $date_formats);
+		return $has_object ? $has_object : new self($props_n_values, false, $timezone, $date_formats);
+	}
+
+
+	/**
+	 * @param array  $props_n_values  incoming values from the database
+	 * @param string $timezone        incoming timezone as set by the model.  If not set the timezone for
+	 *                                the website will be used.
+	 * @return EE_Registration
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public static function new_instance_from_db($props_n_values = array(), $timezone = null)
+	{
+		return new self($props_n_values, true, $timezone);
+	}
+
+
+	/**
+	 *        Set Event ID
+	 *
+	 * @param        int $EVT_ID Event ID
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_event($EVT_ID = 0)
+	{
+		$this->set('EVT_ID', $EVT_ID);
+	}
+
+
+	/**
+	 * Overrides parent set() method so that all calls to set( 'REG_code', $REG_code ) OR set( 'STS_ID', $STS_ID ) can
+	 * be routed to internal methods
+	 *
+	 * @param string $field_name
+	 * @param mixed  $field_value
+	 * @param bool   $use_default
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set($field_name, $field_value, $use_default = false)
+	{
+		switch ($field_name) {
+			case 'REG_code':
+				if (! empty($field_value) && $this->reg_code() === null) {
+					$this->set_reg_code($field_value, $use_default);
+				}
+				break;
+			case 'STS_ID':
+				$this->set_status($field_value, $use_default);
+				break;
+			default:
+				parent::set($field_name, $field_value, $use_default);
+		}
+	}
+
+
+	/**
+	 * Set Status ID
+	 * updates the registration status and ALSO...
+	 * calls reserve_registration_space() if the reg status changes TO approved from any other reg status
+	 * calls release_registration_space() if the reg status changes FROM approved to any other reg status
+	 *
+	 * @param string                $new_STS_ID
+	 * @param boolean               $use_default
+	 * @param ContextInterface|null $context
+	 * @return bool
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_status($new_STS_ID = null, $use_default = false, ContextInterface $context = null)
+	{
+		// get current REG_Status
+		$old_STS_ID = $this->status_ID();
+		// if status has changed
+		if (
+			$old_STS_ID !== $new_STS_ID // and that status has actually changed
+			&& ! empty($old_STS_ID) // and that old status is actually set
+			&& ! empty($new_STS_ID) // as well as the new status
+			&& $this->ID() // ensure registration is in the db
+		) {
+			// update internal status first
+			parent::set('STS_ID', $new_STS_ID, $use_default);
+			// THEN handle other changes that occur when reg status changes
+			// TO approved
+			if ($new_STS_ID === EEM_Registration::status_id_approved) {
+				// reserve a space by incrementing ticket and datetime sold values
+				$this->reserveRegistrationSpace();
+				do_action('AHEE__EE_Registration__set_status__to_approved', $this, $old_STS_ID, $new_STS_ID, $context);
+				// OR FROM  approved
+			} elseif ($old_STS_ID === EEM_Registration::status_id_approved) {
+				// release a space by decrementing ticket and datetime sold values
+				$this->releaseRegistrationSpace();
+				do_action(
+					'AHEE__EE_Registration__set_status__from_approved',
+					$this,
+					$old_STS_ID,
+					$new_STS_ID,
+					$context
+				);
+			}
+			// update status
+			parent::set('STS_ID', $new_STS_ID, $use_default);
+			$this->updateIfCanceledOrReinstated($new_STS_ID, $old_STS_ID, $context);
+			if ($this->statusChangeUpdatesTransaction($context)) {
+				$this->updateTransactionAfterStatusChange();
+			}
+			do_action('AHEE__EE_Registration__set_status__after_update', $this, $old_STS_ID, $new_STS_ID, $context);
+			return true;
+		}
+		// even though the old value matches the new value, it's still good to
+		// allow the parent set method to have a say
+		parent::set('STS_ID', $new_STS_ID, $use_default);
+		return true;
+	}
+
+
+	/**
+	 * update REGs and TXN when cancelled or declined registrations involved
+	 *
+	 * @param string                $new_STS_ID
+	 * @param string                $old_STS_ID
+	 * @param ContextInterface|null $context
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 */
+	private function updateIfCanceledOrReinstated($new_STS_ID, $old_STS_ID, ContextInterface $context = null)
+	{
+		// these reg statuses should not be considered in any calculations involving monies owing
+		$closed_reg_statuses = EEM_Registration::closed_reg_statuses();
+		// true if registration has been cancelled or declined
+		$this->updateIfCanceled(
+			$closed_reg_statuses,
+			$new_STS_ID,
+			$old_STS_ID,
+			$context
+		);
+		$this->updateIfReinstated(
+			$closed_reg_statuses,
+			$new_STS_ID,
+			$old_STS_ID,
+			$context
+		);
+	}
+
+
+	/**
+	 * update REGs and TXN when cancelled or declined registrations involved
+	 *
+	 * @param array                 $closed_reg_statuses
+	 * @param string                $new_STS_ID
+	 * @param string                $old_STS_ID
+	 * @param ContextInterface|null $context
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 */
+	private function updateIfCanceled(
+		array $closed_reg_statuses,
+		$new_STS_ID,
+		$old_STS_ID,
+		ContextInterface $context = null
+	) {
+		// true if registration has been cancelled or declined
+		if (
+			in_array($new_STS_ID, $closed_reg_statuses, true)
+			&& ! in_array($old_STS_ID, $closed_reg_statuses, true)
+		) {
+			/** @type EE_Registration_Processor $registration_processor */
+			$registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
+			/** @type EE_Transaction_Processor $transaction_processor */
+			$transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
+			// cancelled or declined registration
+			$registration_processor->update_registration_after_being_canceled_or_declined(
+				$this,
+				$closed_reg_statuses
+			);
+			$transaction_processor->update_transaction_after_canceled_or_declined_registration(
+				$this,
+				$closed_reg_statuses,
+				false
+			);
+			do_action(
+				'AHEE__EE_Registration__set_status__canceled_or_declined',
+				$this,
+				$old_STS_ID,
+				$new_STS_ID,
+				$context
+			);
+			return;
+		}
+	}
+
+
+	/**
+	 * update REGs and TXN when cancelled or declined registrations involved
+	 *
+	 * @param array                 $closed_reg_statuses
+	 * @param string                $new_STS_ID
+	 * @param string                $old_STS_ID
+	 * @param ContextInterface|null $context
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 */
+	private function updateIfReinstated(
+		array $closed_reg_statuses,
+		$new_STS_ID,
+		$old_STS_ID,
+		ContextInterface $context = null
+	) {
+		// true if reinstating cancelled or declined registration
+		if (
+			in_array($old_STS_ID, $closed_reg_statuses, true)
+			&& ! in_array($new_STS_ID, $closed_reg_statuses, true)
+		) {
+			/** @type EE_Registration_Processor $registration_processor */
+			$registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
+			/** @type EE_Transaction_Processor $transaction_processor */
+			$transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
+			// reinstating cancelled or declined registration
+			$registration_processor->update_canceled_or_declined_registration_after_being_reinstated(
+				$this,
+				$closed_reg_statuses
+			);
+			$transaction_processor->update_transaction_after_reinstating_canceled_registration(
+				$this,
+				$closed_reg_statuses,
+				false
+			);
+			do_action(
+				'AHEE__EE_Registration__set_status__after_reinstated',
+				$this,
+				$old_STS_ID,
+				$new_STS_ID,
+				$context
+			);
+		}
+	}
+
+
+	/**
+	 * @param ContextInterface|null $context
+	 * @return bool
+	 */
+	private function statusChangeUpdatesTransaction(ContextInterface $context = null)
+	{
+		$contexts_that_do_not_update_transaction = (array) apply_filters(
+			'AHEE__EE_Registration__statusChangeUpdatesTransaction__contexts_that_do_not_update_transaction',
+			array('spco_reg_step_attendee_information_process_registrations'),
+			$context,
+			$this
+		);
+		return ! (
+			$context instanceof ContextInterface
+			&& in_array($context->slug(), $contexts_that_do_not_update_transaction, true)
+		);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 */
+	private function updateTransactionAfterStatusChange()
+	{
+		/** @type EE_Transaction_Payments $transaction_payments */
+		$transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
+		$transaction_payments->recalculate_transaction_total($this->transaction(), false);
+		$this->transaction()->update_status_based_on_total_paid();
+	}
+
+
+	/**
+	 * get Status ID
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function status_ID()
+	{
+		return $this->get('STS_ID');
+	}
+
+
+	/**
+	 * Gets the ticket this registration is for
+	 *
+	 * @param boolean $include_archived whether to include archived tickets or not.
+	 * @return EE_Ticket|EE_Base_Class
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function ticket($include_archived = true)
+	{
+		$query_params = array();
+		if ($include_archived) {
+			$query_params['default_where_conditions'] = 'none';
+		}
+		return $this->get_first_related('Ticket', $query_params);
+	}
+
+
+	/**
+	 * Gets the event this registration is for
+	 *
+	 * @return EE_Event
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function event()
+	{
+		$event = $this->get_first_related('Event');
+		if (! $event instanceof \EE_Event) {
+			throw new EntityNotFoundException('Event ID', $this->event_ID());
+		}
+		return $event;
+	}
+
+
+	/**
+	 * Gets the "author" of the registration.  Note that for the purposes of registrations, the author will correspond
+	 * with the author of the event this registration is for.
+	 *
+	 * @since 4.5.0
+	 * @return int
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function wp_user()
+	{
+		$event = $this->event();
+		if ($event instanceof EE_Event) {
+			return $event->wp_user();
+		}
+		return 0;
+	}
+
+
+	/**
+	 * increments this registration's related ticket sold and corresponding datetime sold values
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws UnexpectedEntityException
+	 */
+	private function reserveRegistrationSpace()
+	{
+		// reserved ticket and datetime counts will be decremented as sold counts are incremented
+		// so stop tracking that this reg has a ticket reserved
+		$this->release_reserved_ticket(false, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
+		$ticket = $this->ticket();
+		$ticket->increaseSold();
+		// possibly set event status to sold out
+		$this->event()->perform_sold_out_status_check();
+	}
+
+
+	/**
+	 * decrements (subtracts) this registration's related ticket sold and corresponding datetime sold values
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws UnexpectedEntityException
+	 */
+	private function releaseRegistrationSpace()
+	{
+		$ticket = $this->ticket();
+		$ticket->decreaseSold();
+		// possibly change event status from sold out back to previous status
+		$this->event()->perform_sold_out_status_check();
+	}
+
+
+	/**
+	 * tracks this registration's ticket reservation in extra meta
+	 * and can increment related ticket reserved and corresponding datetime reserved values
+	 *
+	 * @param bool   $update_ticket if true, will increment ticket and datetime reserved count
+	 * @param string $source
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function reserve_ticket($update_ticket = false, $source = 'unknown')
+	{
+		// only reserve ticket if space is not currently reserved
+		if ((bool) $this->get_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true) !== true) {
+			$reserved = $this->update_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true);
+			if ($reserved && $update_ticket) {
+				$ticket = $this->ticket();
+				$ticket->increaseReserved(1, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
+				$this->update_extra_meta('reserve_ticket', "{$this->ticket_ID()} from {$source}");
+				$ticket->save();
+			}
+		}
+	}
+
+
+	/**
+	 * stops tracking this registration's ticket reservation in extra meta
+	 * decrements (subtracts) related ticket reserved and corresponding datetime reserved values
+	 *
+	 * @param bool   $update_ticket if true, will decrement ticket and datetime reserved count
+	 * @param string $source
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function release_reserved_ticket($update_ticket = false, $source = 'unknown')
+	{
+		// only release ticket if space is currently reserved
+		if ((bool) $this->get_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, true) === true) {
+			$reserved = $this->update_extra_meta(EE_Registration::HAS_RESERVED_TICKET_KEY, false);
+			if ($reserved && $update_ticket) {
+				$ticket = $this->ticket();
+				$ticket->decreaseReserved(1, true, "REG: {$this->ID()} (ln:" . __LINE__ . ')');
+				$this->update_extra_meta('release_reserved_ticket', "{$this->ticket_ID()} from {$source}");
+			}
+		}
+	}
+
+
+	/**
+	 * Set Attendee ID
+	 *
+	 * @param        int $ATT_ID Attendee ID
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_attendee_id($ATT_ID = 0)
+	{
+		$this->set('ATT_ID', $ATT_ID);
+	}
+
+
+	/**
+	 *        Set Transaction ID
+	 *
+	 * @param        int $TXN_ID Transaction ID
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_transaction_id($TXN_ID = 0)
+	{
+		$this->set('TXN_ID', $TXN_ID);
+	}
+
+
+	/**
+	 *        Set Session
+	 *
+	 * @param    string $REG_session PHP Session ID
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_session($REG_session = '')
+	{
+		$this->set('REG_session', $REG_session);
+	}
+
+
+	/**
+	 *        Set Registration URL Link
+	 *
+	 * @param    string $REG_url_link Registration URL Link
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_reg_url_link($REG_url_link = '')
+	{
+		$this->set('REG_url_link', $REG_url_link);
+	}
+
+
+	/**
+	 *        Set Attendee Counter
+	 *
+	 * @param        int $REG_count Primary Attendee
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_count($REG_count = 1)
+	{
+		$this->set('REG_count', $REG_count);
+	}
+
+
+	/**
+	 *        Set Group Size
+	 *
+	 * @param        boolean $REG_group_size Group Registration
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_group_size($REG_group_size = false)
+	{
+		$this->set('REG_group_size', $REG_group_size);
+	}
+
+
+	/**
+	 *    is_not_approved -  convenience method that returns TRUE if REG status ID ==
+	 *    EEM_Registration::status_id_not_approved
+	 *
+	 * @return        boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_not_approved()
+	{
+		return $this->status_ID() === EEM_Registration::status_id_not_approved;
+	}
+
+
+	/**
+	 *    is_pending_payment -  convenience method that returns TRUE if REG status ID ==
+	 *    EEM_Registration::status_id_pending_payment
+	 *
+	 * @return        boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_pending_payment()
+	{
+		return $this->status_ID() === EEM_Registration::status_id_pending_payment;
+	}
+
+
+	/**
+	 *    is_approved -  convenience method that returns TRUE if REG status ID == EEM_Registration::status_id_approved
+	 *
+	 * @return        boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_approved()
+	{
+		return $this->status_ID() === EEM_Registration::status_id_approved;
+	}
+
+
+	/**
+	 *    is_cancelled -  convenience method that returns TRUE if REG status ID == EEM_Registration::status_id_cancelled
+	 *
+	 * @return        boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_cancelled()
+	{
+		return $this->status_ID() === EEM_Registration::status_id_cancelled;
+	}
+
+
+	/**
+	 *    is_declined -  convenience method that returns TRUE if REG status ID == EEM_Registration::status_id_declined
+	 *
+	 * @return        boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_declined()
+	{
+		return $this->status_ID() === EEM_Registration::status_id_declined;
+	}
+
+
+	/**
+	 *    is_incomplete -  convenience method that returns TRUE if REG status ID ==
+	 *    EEM_Registration::status_id_incomplete
+	 *
+	 * @return        boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_incomplete()
+	{
+		return $this->status_ID() === EEM_Registration::status_id_incomplete;
+	}
+
+
+	/**
+	 *        Set Registration Date
+	 *
+	 * @param        mixed ( int or string ) $REG_date Registration Date - Unix timestamp or string representation of
+	 *                                                 Date
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_reg_date($REG_date = false)
+	{
+		$this->set('REG_date', $REG_date);
+	}
+
+
+	/**
+	 *    Set final price owing for this registration after all ticket/price modifications
+	 *
+	 * @param    float $REG_final_price
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_final_price($REG_final_price = 0.00)
+	{
+		$this->set('REG_final_price', $REG_final_price);
+	}
+
+
+	/**
+	 *    Set amount paid towards this registration's final price
+	 *
+	 * @param    float $REG_paid
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_paid($REG_paid = 0.00)
+	{
+		$this->set('REG_paid', $REG_paid);
+	}
+
+
+	/**
+	 *        Attendee Is Going
+	 *
+	 * @param        boolean $REG_att_is_going Attendee Is Going
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_att_is_going($REG_att_is_going = false)
+	{
+		$this->set('REG_att_is_going', $REG_att_is_going);
+	}
+
+
+	/**
+	 * Gets the related attendee
+	 *
+	 * @return EE_Attendee|EE_Base_Class
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function attendee()
+	{
+		return $this->get_first_related('Attendee');
+	}
+
+	/**
+	 * Gets the name of the attendee.
+	 * @since 4.10.12.p
+	 * @param bool $apply_html_entities set to true if you want to use HTML entities.
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function attendeeName($apply_html_entities = false)
+	{
+		$attendee = $this->get_first_related('Attendee');
+		if ($attendee instanceof EE_Attendee) {
+			$attendee_name = $attendee->full_name($apply_html_entities);
+		} else {
+			$attendee_name = esc_html__('Unknown', 'event_espresso');
+		}
+		return $attendee_name;
+	}
+
+
+	/**
+	 *        get Event ID
+	 */
+	public function event_ID()
+	{
+		return $this->get('EVT_ID');
+	}
+
+
+	/**
+	 *        get Event ID
+	 */
+	public function event_name()
+	{
+		$event = $this->event_obj();
+		if ($event) {
+			return $event->name();
+		} else {
+			return null;
+		}
+	}
+
+
+	/**
+	 * Fetches the event this registration is for
+	 *
+	 * @return EE_Base_Class|EE_Event
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function event_obj()
+	{
+		return $this->get_first_related('Event');
+	}
+
+
+	/**
+	 *        get Attendee ID
+	 */
+	public function attendee_ID()
+	{
+		return $this->get('ATT_ID');
+	}
+
+
+	/**
+	 *        get PHP Session ID
+	 */
+	public function session_ID()
+	{
+		return $this->get('REG_session');
+	}
+
+
+	/**
+	 * Gets the string which represents the URL trigger for the receipt template in the message template system.
+	 *
+	 * @param string $messenger 'pdf' or 'html'.  Default 'html'.
+	 * @return string
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function receipt_url($messenger = 'html')
+	{
+
+		/**
+		 * The below will be deprecated one version after this.  We check first if there is a custom receipt template
+		 * already in use on old system.  If there is then we just return the standard url for it.
+		 *
+		 * @since 4.5.0
+		 */
+		$template_relative_path = 'modules/gateways/Invoice/lib/templates/receipt_body.template.php';
+		$has_custom = EEH_Template::locate_template(
+			$template_relative_path,
+			array(),
+			true,
+			true,
+			true
+		);
+
+		if ($has_custom) {
+			return add_query_arg(array('receipt' => 'true'), $this->invoice_url('launch'));
+		}
+		return apply_filters('FHEE__EE_Registration__receipt_url__receipt_url', '', $this, $messenger, 'receipt');
+	}
+
+
+	/**
+	 * Gets the string which represents the URL trigger for the invoice template in the message template system.
+	 *
+	 * @param string $messenger 'pdf' or 'html'.  Default 'html'.
+	 * @return string
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function invoice_url($messenger = 'html')
+	{
+		/**
+		 * The below will be deprecated one version after this.  We check first if there is a custom invoice template
+		 * already in use on old system.  If there is then we just return the standard url for it.
+		 *
+		 * @since 4.5.0
+		 */
+		$template_relative_path = 'modules/gateways/Invoice/lib/templates/invoice_body.template.php';
+		$has_custom = EEH_Template::locate_template(
+			$template_relative_path,
+			array(),
+			true,
+			true,
+			true
+		);
+
+		if ($has_custom) {
+			if ($messenger == 'html') {
+				return $this->invoice_url('launch');
+			}
+			$route = $messenger == 'download' || $messenger == 'pdf' ? 'download_invoice' : 'launch_invoice';
+
+			$query_args = array('ee' => $route, 'id' => $this->reg_url_link());
+			if ($messenger == 'html') {
+				$query_args['html'] = true;
+			}
+			return add_query_arg($query_args, get_permalink(EE_Registry::instance()->CFG->core->thank_you_page_id));
+		}
+		return apply_filters('FHEE__EE_Registration__invoice_url__invoice_url', '', $this, $messenger, 'invoice');
+	}
+
+
+	/**
+	 * get Registration URL Link
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function reg_url_link()
+	{
+		return (string) $this->get('REG_url_link');
+	}
+
+
+	/**
+	 * Echoes out invoice_url()
+	 *
+	 * @param string $type 'download','launch', or 'html' (default is 'launch')
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function e_invoice_url($type = 'launch')
+	{
+		echo esc_url_raw($this->invoice_url($type));
+	}
+
+
+	/**
+	 * Echoes out payment_overview_url
+	 */
+	public function e_payment_overview_url()
+	{
+		echo esc_url_raw($this->payment_overview_url());
+	}
+
+
+	/**
+	 * Gets the URL for the checkout payment options reg step
+	 * with this registration's REG_url_link added as a query parameter
+	 *
+	 * @param bool $clear_session Set to true when you want to clear the session on revisiting the
+	 *                            payment overview url.
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function payment_overview_url($clear_session = false)
+	{
+		return add_query_arg(
+			(array) apply_filters(
+				'FHEE__EE_Registration__payment_overview_url__query_args',
+				array(
+					'e_reg_url_link' => $this->reg_url_link(),
+					'step'           => 'payment_options',
+					'revisit'        => true,
+					'clear_session'  => (bool) $clear_session,
+				),
+				$this
+			),
+			EE_Registry::instance()->CFG->core->reg_page_url()
+		);
+	}
+
+
+	/**
+	 * Gets the URL for the checkout attendee information reg step
+	 * with this registration's REG_url_link added as a query parameter
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function edit_attendee_information_url()
+	{
+		return add_query_arg(
+			(array) apply_filters(
+				'FHEE__EE_Registration__edit_attendee_information_url__query_args',
+				array(
+					'e_reg_url_link' => $this->reg_url_link(),
+					'step'           => 'attendee_information',
+					'revisit'        => true,
+				),
+				$this
+			),
+			EE_Registry::instance()->CFG->core->reg_page_url()
+		);
+	}
+
+
+	/**
+	 * Simply generates and returns the appropriate admin_url link to edit this registration
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_admin_edit_url()
+	{
+		return EEH_URL::add_query_args_and_nonce(
+			array(
+				'page'    => 'espresso_registrations',
+				'action'  => 'view_registration',
+				'_REG_ID' => $this->ID(),
+			),
+			admin_url('admin.php')
+		);
+	}
+
+
+	/**
+	 * is_primary_registrant?
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_primary_registrant()
+	{
+		return (int) $this->get('REG_count') === 1;
+	}
+
+
+	/**
+	 * This returns the primary registration object for this registration group (which may be this object).
+	 *
+	 * @return EE_Registration
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_primary_registration()
+	{
+		if ($this->is_primary_registrant()) {
+			return $this;
+		}
+
+		// k reg_count !== 1 so let's get the EE_Registration object matching this txn_id and reg_count == 1
+		/** @var EE_Registration $primary_registrant */
+		$primary_registrant = EEM_Registration::instance()->get_one(
+			array(
+				array(
+					'TXN_ID'    => $this->transaction_ID(),
+					'REG_count' => 1,
+				),
+			)
+		);
+		return $primary_registrant;
+	}
+
+
+	/**
+	 * get  Attendee Number
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function count()
+	{
+		return $this->get('REG_count');
+	}
+
+
+	/**
+	 * get Group Size
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function group_size()
+	{
+		return $this->get('REG_group_size');
+	}
+
+
+	/**
+	 * get Registration Date
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function date()
+	{
+		return $this->get('REG_date');
+	}
+
+
+	/**
+	 * gets a pretty date
+	 *
+	 * @param string $date_format
+	 * @param string $time_format
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_date($date_format = null, $time_format = null)
+	{
+		return $this->get_datetime('REG_date', $date_format, $time_format);
+	}
+
+
+	/**
+	 * final_price
+	 * the registration's share of the transaction total, so that the
+	 * sum of all the transaction's REG_final_prices equal the transaction's total
+	 *
+	 * @return float
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function final_price()
+	{
+		return $this->get('REG_final_price');
+	}
+
+
+	/**
+	 * pretty_final_price
+	 *  final price as formatted string, with correct decimal places and currency symbol
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_final_price()
+	{
+		return $this->get_pretty('REG_final_price');
+	}
+
+
+	/**
+	 * get paid (yeah)
+	 *
+	 * @return float
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function paid()
+	{
+		return $this->get('REG_paid');
+	}
+
+
+	/**
+	 * pretty_paid
+	 *
+	 * @return float
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_paid()
+	{
+		return $this->get_pretty('REG_paid');
+	}
+
+
+	/**
+	 * owes_monies_and_can_pay
+	 * whether or not this registration has monies owing and it's' status allows payment
+	 *
+	 * @param array $requires_payment
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function owes_monies_and_can_pay($requires_payment = array())
+	{
+		// these reg statuses require payment (if event is not free)
+		$requires_payment = ! empty($requires_payment)
+			? $requires_payment
+			: EEM_Registration::reg_statuses_that_allow_payment();
+		if (
+			$this->final_price() !== 0 &&
+			$this->final_price() !== $this->paid() &&
+			in_array($this->status_ID(), $requires_payment)
+		) {
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * Prints out the return value of $this->pretty_status()
+	 *
+	 * @param bool $show_icons
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function e_pretty_status($show_icons = false)
+	{
+		echo wp_kses($this->pretty_status($show_icons), AllowedTags::getAllowedTags());
+	}
+
+
+	/**
+	 * Returns a nice version of the status for displaying to customers
+	 *
+	 * @param bool $show_icons
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_status($show_icons = false)
+	{
+		$status = EEM_Status::instance()->localized_status(
+			array($this->status_ID() => esc_html__('unknown', 'event_espresso')),
+			false,
+			'sentence'
+		);
+		$icon = '';
+		switch ($this->status_ID()) {
+			case EEM_Registration::status_id_approved:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-star-filled ee-icon-size-16 green-text"></span>'
+					: '';
+				break;
+			case EEM_Registration::status_id_pending_payment:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-star-half ee-icon-size-16 orange-text"></span>'
+					: '';
+				break;
+			case EEM_Registration::status_id_not_approved:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-marker ee-icon-size-16 orange-text"></span>'
+					: '';
+				break;
+			case EEM_Registration::status_id_cancelled:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-no ee-icon-size-16 lt-grey-text"></span>'
+					: '';
+				break;
+			case EEM_Registration::status_id_incomplete:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-no ee-icon-size-16 lt-orange-text"></span>'
+					: '';
+				break;
+			case EEM_Registration::status_id_declined:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-no ee-icon-size-16 red-text"></span>'
+					: '';
+				break;
+			case EEM_Registration::status_id_wait_list:
+				$icon = $show_icons
+					? '<span class="dashicons dashicons-clipboard ee-icon-size-16 purple-text"></span>'
+					: '';
+				break;
+		}
+		return $icon . $status[ $this->status_ID() ];
+	}
+
+
+	/**
+	 *        get Attendee Is Going
+	 */
+	public function att_is_going()
+	{
+		return $this->get('REG_att_is_going');
+	}
+
+
+	/**
+	 * Gets related answers
+	 *
+	 * @param array $query_params @see
+	 *                            https://github.com/eventespresso/event-espresso-core/tree/master/docs/G--Model-System/model-query-params.md
+	 * @return EE_Answer[]|EE_Base_Class[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function answers($query_params = null)
+	{
+		return $this->get_many_related('Answer', $query_params);
+	}
+
+
+	/**
+	 * Gets the registration's answer value to the specified question
+	 * (either the question's ID or a question object)
+	 *
+	 * @param EE_Question|int $question
+	 * @param bool            $pretty_value
+	 * @return array|string if pretty_value= true, the result will always be a string
+	 * (because the answer might be an array of answer values, so passing pretty_value=true
+	 * will convert it into some kind of string)
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function answer_value_to_question($question, $pretty_value = true)
+	{
+		$question_id = EEM_Question::instance()->ensure_is_ID($question);
+		return EEM_Answer::instance()->get_answer_value_to_question($this, $question_id, $pretty_value);
+	}
+
+
+	/**
+	 * question_groups
+	 * returns an array of EE_Question_Group objects for this registration
+	 *
+	 * @return EE_Question_Group[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function question_groups()
+	{
+		return EEM_Event::instance()->get_question_groups_for_event($this->event_ID(), $this);
+	}
+
+
+	/**
+	 * count_question_groups
+	 * returns a count of the number of EE_Question_Group objects for this registration
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function count_question_groups()
+	{
+		return EEM_Event::instance()->count_related(
+			$this->event_ID(),
+			'Question_Group',
+			[
+				[
+					'Event_Question_Group.'
+					. EEM_Event_Question_Group::instance()->fieldNameForContext($this->is_primary_registrant()) => true,
+				]
+			]
+		);
+	}
+
+
+	/**
+	 * Returns the registration date in the 'standard' string format
+	 * (function may be improved in the future to allow for different formats and timezones)
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function reg_date()
+	{
+		return $this->get_datetime('REG_date');
+	}
+
+
+	/**
+	 * Gets the datetime-ticket for this registration (ie, it can be used to isolate
+	 * the ticket this registration purchased, or the datetime they have registered
+	 * to attend)
+	 *
+	 * @return EE_Base_Class|EE_Datetime_Ticket
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function datetime_ticket()
+	{
+		return $this->get_first_related('Datetime_Ticket');
+	}
+
+
+	/**
+	 * Sets the registration's datetime_ticket.
+	 *
+	 * @param EE_Datetime_Ticket $datetime_ticket
+	 * @return EE_Base_Class|EE_Datetime_Ticket
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_datetime_ticket($datetime_ticket)
+	{
+		return $this->_add_relation_to($datetime_ticket, 'Datetime_Ticket');
+	}
+
+
+	/**
+	 * Gets deleted
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function deleted()
+	{
+		return $this->get('REG_deleted');
+	}
+
+
+	/**
+	 * Sets deleted
+	 *
+	 * @param boolean $deleted
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function set_deleted($deleted)
+	{
+		if ($deleted) {
+			$this->delete();
+		} else {
+			$this->restore();
+		}
+	}
+
+
+	/**
+	 * Get the status object of this object
+	 *
+	 * @return EE_Base_Class|EE_Status
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function status_obj()
+	{
+		return $this->get_first_related('Status');
+	}
+
+
+	/**
+	 * Returns the number of times this registration has checked into any of the datetimes
+	 * its available for
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function count_checkins()
+	{
+		return $this->get_model()->count_related($this, 'Checkin');
+	}
+
+
+	/**
+	 * Returns the number of current Check-ins this registration is checked into for any of the datetimes the
+	 * registration is for.  Note, this is ONLY checked in (does not include checkedout)
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function count_checkins_not_checkedout()
+	{
+		return $this->get_model()->count_related($this, 'Checkin', array(array('CHK_in' => 1)));
+	}
+
+
+	/**
+	 * The purpose of this method is simply to check whether this registration can checkin to the given datetime.
+	 *
+	 * @param int | EE_Datetime $DTT_OR_ID      The datetime the registration is being checked against
+	 * @param bool              $check_approved This is used to indicate whether the caller wants can_checkin to also
+	 *                                          consider registration status as well as datetime access.
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function can_checkin($DTT_OR_ID, $check_approved = true)
+	{
+		$DTT_ID = EEM_Datetime::instance()->ensure_is_ID($DTT_OR_ID);
+		// first check registration status
+		if (! $DTT_ID || ($check_approved && ! $this->is_approved())) {
+			return false;
+		}
+		// is there a datetime ticket that matches this dtt_ID?
+		if (
+			! (EEM_Datetime_Ticket::instance()->exists(
+				array(
+					array(
+						'TKT_ID' => $this->get('TKT_ID'),
+						'DTT_ID' => $DTT_ID,
+					),
+				)
+			))
+		) {
+			return false;
+		}
+
+		// final check is against TKT_uses
+		return $this->verify_can_checkin_against_TKT_uses($DTT_ID);
+	}
+
+
+	/**
+	 * This method verifies whether the user can checkin for the given datetime considering the max uses value set on
+	 * the ticket. To do this,  a query is done to get the count of the datetime records already checked into.  If the
+	 * datetime given does not have a check-in record and checking in for that datetime will exceed the allowed uses,
+	 * then return false.  Otherwise return true.
+	 *
+	 * @param int | EE_Datetime $DTT_OR_ID The datetime the registration is being checked against
+	 * @return bool true means can checkin.  false means cannot checkin.
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function verify_can_checkin_against_TKT_uses($DTT_OR_ID)
+	{
+		$DTT_ID = EEM_Datetime::instance()->ensure_is_ID($DTT_OR_ID);
+
+		if (! $DTT_ID) {
+			return false;
+		}
+
+		$max_uses = $this->ticket() instanceof EE_Ticket ? $this->ticket()->uses() : EE_INF;
+
+		// if max uses is not set or equals infinity then return true cause its not a factor for whether user can
+		// check-in or not.
+		if (! $max_uses || $max_uses === EE_INF) {
+			return true;
+		}
+
+		// does this datetime have a checkin record?  If so, then the dtt count has already been verified so we can just
+		// go ahead and toggle.
+		if (EEM_Checkin::instance()->exists(array(array('REG_ID' => $this->ID(), 'DTT_ID' => $DTT_ID)))) {
+			return true;
+		}
+
+		// made it here so the last check is whether the number of checkins per unique datetime on this registration
+		// disallows further check-ins.
+		$count_unique_dtt_checkins = EEM_Checkin::instance()->count(
+			array(
+				array(
+					'REG_ID' => $this->ID(),
+					'CHK_in' => true,
+				),
+			),
+			'DTT_ID',
+			true
+		);
+		// checkins have already reached their max number of uses
+		// so registrant can NOT checkin
+		if ($count_unique_dtt_checkins >= $max_uses) {
+			EE_Error::add_error(
+				esc_html__(
+					'Check-in denied because number of datetime uses for the ticket has been reached or exceeded.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return false;
+		}
+		return true;
+	}
+
+
+	/**
+	 * toggle Check-in status for this registration
+	 * Check-ins are toggled in the following order:
+	 * never checked in -> checked in
+	 * checked in -> checked out
+	 * checked out -> checked in
+	 *
+	 * @param  int $DTT_ID  include specific datetime to toggle Check-in for.
+	 *                      If not included or null, then it is assumed latest datetime is being toggled.
+	 * @param bool $verify  If true then can_checkin() is used to verify whether the person
+	 *                      can be checked in or not.  Otherwise this forces change in checkin status.
+	 * @return bool|int     the chk_in status toggled to OR false if nothing got changed.
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function toggle_checkin_status($DTT_ID = null, $verify = false)
+	{
+		if (empty($DTT_ID)) {
+			$datetime = $this->get_latest_related_datetime();
+			$DTT_ID = $datetime instanceof EE_Datetime ? $datetime->ID() : 0;
+			// verify the registration can checkin for the given DTT_ID
+		} elseif (! $this->can_checkin($DTT_ID, $verify)) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'The given registration (ID:%1$d) can not be checked in to the given DTT_ID (%2$d), because the registration does not have access',
+						'event_espresso'
+					),
+					$this->ID(),
+					$DTT_ID
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return false;
+		}
+		$status_paths = array(
+			EE_Checkin::status_checked_never => EE_Checkin::status_checked_in,
+			EE_Checkin::status_checked_in    => EE_Checkin::status_checked_out,
+			EE_Checkin::status_checked_out   => EE_Checkin::status_checked_in,
+		);
+		// start by getting the current status so we know what status we'll be changing to.
+		$cur_status = $this->check_in_status_for_datetime($DTT_ID);
+		$status_to = $status_paths[ $cur_status ];
+		// database only records true for checked IN or false for checked OUT
+		// no record ( null ) means checked in NEVER, but we obviously don't save that
+		$new_status = $status_to === EE_Checkin::status_checked_in;
+		// add relation - note Check-ins are always creating new rows
+		// because we are keeping track of Check-ins over time.
+		// Eventually we'll probably want to show a list table
+		// for the individual Check-ins so that they can be managed.
+		$checkin = EE_Checkin::new_instance(
+			array(
+				'REG_ID' => $this->ID(),
+				'DTT_ID' => $DTT_ID,
+				'CHK_in' => $new_status,
+			)
+		);
+		// if the record could not be saved then return false
+		if ($checkin->save() === 0) {
+			if (WP_DEBUG) {
+				global $wpdb;
+				$error = sprintf(
+					esc_html__(
+						'Registration check in update failed because of the following database error: %1$s%2$s',
+						'event_espresso'
+					),
+					'<br />',
+					$wpdb->last_error
+				);
+			} else {
+				$error = esc_html__(
+					'Registration check in update failed because of an unknown database error',
+					'event_espresso'
+				);
+			}
+			EE_Error::add_error($error, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+		// Fire a checked_in and checkout_out action.
+		$checked_status = $status_to === EE_Checkin::status_checked_in ? 'checked_in' : 'checked_out';
+		do_action("AHEE__EE_Registration__toggle_checkin_status__{$checked_status}", $this, $DTT_ID);
+		return $status_to;
+	}
+
+
+	/**
+	 * Returns the latest datetime related to this registration (via the ticket attached to the registration).
+	 * "Latest" is defined by the `DTT_EVT_start` column.
+	 *
+	 * @return EE_Datetime|null
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_latest_related_datetime()
+	{
+		return EEM_Datetime::instance()->get_one(
+			array(
+				array(
+					'Ticket.Registration.REG_ID' => $this->ID(),
+				),
+				'order_by' => array('DTT_EVT_start' => 'DESC'),
+			)
+		);
+	}
+
+
+	/**
+	 * Returns the earliest datetime related to this registration (via the ticket attached to the registration).
+	 * "Earliest" is defined by the `DTT_EVT_start` column.
+	 *
+	 * @return EE_Base_Class|EE_Soft_Delete_Base_Class|NULL
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_earliest_related_datetime()
+	{
+		return EEM_Datetime::instance()->get_one(
+			array(
+				array(
+					'Ticket.Registration.REG_ID' => $this->ID(),
+				),
+				'order_by' => array('DTT_EVT_start' => 'ASC'),
+			)
+		);
+	}
+
+
+	/**
+	 * This method simply returns the check-in status for this registration and the given datetime.
+	 * If neither the datetime nor the checkin values are provided as arguments,
+	 * then this will return the LATEST check-in status for the registration across all datetimes it belongs to.
+	 *
+	 * @param  int       $DTT_ID  The ID of the datetime we're checking against
+	 *                            (if empty we'll get the primary datetime for
+	 *                            this registration (via event) and use it's ID);
+	 * @param EE_Checkin $checkin If present, we use the given checkin object rather than the dtt_id.
+	 * @return int                Integer representing Check-in status.
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function check_in_status_for_datetime($DTT_ID = 0, $checkin = null)
+	{
+		$checkin_query_params = array(
+			'order_by' => array('CHK_timestamp' => 'DESC'),
+		);
+
+		if ($DTT_ID > 0) {
+			$checkin_query_params[0] = array('DTT_ID' => $DTT_ID);
+		}
+
+		// get checkin object (if exists)
+		$checkin = $checkin instanceof EE_Checkin
+			? $checkin
+			: $this->get_first_related('Checkin', $checkin_query_params);
+		if ($checkin instanceof EE_Checkin) {
+			if ($checkin->get('CHK_in')) {
+				return EE_Checkin::status_checked_in; // checked in
+			}
+			return EE_Checkin::status_checked_out; // had checked in but is now checked out.
+		}
+		return EE_Checkin::status_checked_never; // never been checked in
+	}
+
+
+	/**
+	 * This method returns a localized message for the toggled Check-in message.
+	 *
+	 * @param  int $DTT_ID include specific datetime to get the correct Check-in message.  If not included or null,
+	 *                     then it is assumed Check-in for primary datetime was toggled.
+	 * @param bool $error  This just flags that you want an error message returned. This is put in so that the error
+	 *                     message can be customized with the attendee name.
+	 * @return string internationalized message
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_checkin_msg($DTT_ID, $error = false)
+	{
+		// let's get the attendee first so we can include the name of the attendee
+		$attendee = $this->get_first_related('Attendee');
+		if ($attendee instanceof EE_Attendee) {
+			if ($error) {
+				return sprintf(
+					esc_html__("%s's check-in status was not changed.", "event_espresso"),
+					$attendee->full_name()
+				);
+			}
+			$cur_status = $this->check_in_status_for_datetime($DTT_ID);
+			// what is the status message going to be?
+			switch ($cur_status) {
+				case EE_Checkin::status_checked_never:
+					return sprintf(
+						esc_html__('%s has been removed from Check-in records', 'event_espresso'),
+						$attendee->full_name()
+					);
+					break;
+				case EE_Checkin::status_checked_in:
+					return sprintf(esc_html__('%s has been checked in', 'event_espresso'), $attendee->full_name());
+					break;
+				case EE_Checkin::status_checked_out:
+					return sprintf(esc_html__('%s has been checked out', 'event_espresso'), $attendee->full_name());
+					break;
+			}
+		}
+		return esc_html__('The check-in status could not be determined.', 'event_espresso');
+	}
+
+
+	/**
+	 * Returns the related EE_Transaction to this registration
+	 *
+	 * @return EE_Transaction
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function transaction()
+	{
+		$transaction = $this->get_first_related('Transaction');
+		if (! $transaction instanceof \EE_Transaction) {
+			throw new EntityNotFoundException('Transaction ID', $this->transaction_ID());
+		}
+		return $transaction;
+	}
+
+
+	/**
+	 * get Registration Code
+	 *
+	 * @return mixed
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function reg_code()
+	{
+		return $this->get('REG_code');
+	}
+
+
+	/**
+	 * @return mixed
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function transaction_ID()
+	{
+		return $this->get('TXN_ID');
+	}
+
+
+	/**
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function ticket_ID()
+	{
+		return $this->get('TKT_ID');
+	}
+
+
+	/**
+	 * Set Registration Code
+	 *
+	 * @param    string  $REG_code Registration Code
+	 * @param    boolean $use_default
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_reg_code($REG_code, $use_default = false)
+	{
+		if (empty($REG_code)) {
+			EE_Error::add_error(
+				esc_html__('REG_code can not be empty.', 'event_espresso'),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return;
+		}
+		if (! $this->reg_code()) {
+			parent::set('REG_code', $REG_code, $use_default);
+		} else {
+			EE_Error::doing_it_wrong(
+				__CLASS__ . '::' . __FUNCTION__,
+				esc_html__('Can not change a registration REG_code once it has been set.', 'event_espresso'),
+				'4.6.0'
+			);
+		}
+	}
+
+
+	/**
+	 * Returns all other registrations in the same group as this registrant who have the same ticket option.
+	 * Note, if you want to just get all registrations in the same transaction (group), use:
+	 *    $registration->transaction()->registrations();
+	 *
+	 * @since 4.5.0
+	 * @return EE_Registration[] or empty array if this isn't a group registration.
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_all_other_registrations_in_group()
+	{
+		if ($this->group_size() < 2) {
+			return array();
+		}
+
+		$query[0] = array(
+			'TXN_ID' => $this->transaction_ID(),
+			'REG_ID' => array('!=', $this->ID()),
+			'TKT_ID' => $this->ticket_ID(),
+		);
+		/** @var EE_Registration[] $registrations */
+		$registrations = $this->get_model()->get_all($query);
+		return $registrations;
+	}
+
+
+	/**
+	 * Return the link to the admin details for the object.
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_admin_details_link()
+	{
+		EE_Registry::instance()->load_helper('URL');
+		return EEH_URL::add_query_args_and_nonce(
+			array(
+				'page'    => 'espresso_registrations',
+				'action'  => 'view_registration',
+				'_REG_ID' => $this->ID(),
+			),
+			admin_url('admin.php')
+		);
+	}
+
+
+	/**
+	 * Returns the link to the editor for the object.  Sometimes this is the same as the details.
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_admin_edit_link()
+	{
+		return $this->get_admin_details_link();
+	}
+
+
+	/**
+	 * Returns the link to a settings page for the object.
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_admin_settings_link()
+	{
+		return $this->get_admin_details_link();
+	}
+
+
+	/**
+	 * Returns the link to the "overview" for the object (typically the "list table" view).
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_admin_overview_link()
+	{
+		EE_Registry::instance()->load_helper('URL');
+		return EEH_URL::add_query_args_and_nonce(
+			array(
+				'page' => 'espresso_registrations',
+			),
+			admin_url('admin.php')
+		);
+	}
+
+
+	/**
+	 * @param array $query_params
+	 * @return EE_Base_Class[]|EE_Registration[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function payments($query_params = array())
+	{
+		return $this->get_many_related('Payment', $query_params);
+	}
+
+
+	/**
+	 * @param array $query_params
+	 * @return EE_Base_Class[]|EE_Registration_Payment[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function registration_payments($query_params = array())
+	{
+		return $this->get_many_related('Registration_Payment', $query_params);
+	}
+
+
+	/**
+	 * This grabs the payment method corresponding to the last payment made for the amount owing on the registration.
+	 * Note: if there are no payments on the registration there will be no payment method returned.
+	 *
+	 * @return EE_Payment|EE_Payment_Method|null
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function payment_method()
+	{
+		return EEM_Payment_Method::instance()->get_last_used_for_registration($this);
+	}
+
+
+	/**
+	 * @return \EE_Line_Item
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function ticket_line_item()
+	{
+		$ticket = $this->ticket();
+		$transaction = $this->transaction();
+		$line_item = null;
+		$ticket_line_items = \EEH_Line_Item::get_line_items_by_object_type_and_IDs(
+			$transaction->total_line_item(),
+			'Ticket',
+			array($ticket->ID())
+		);
+		foreach ($ticket_line_items as $ticket_line_item) {
+			if (
+				$ticket_line_item instanceof \EE_Line_Item
+				&& $ticket_line_item->OBJ_type() === 'Ticket'
+				&& $ticket_line_item->OBJ_ID() === $ticket->ID()
+			) {
+				$line_item = $ticket_line_item;
+				break;
+			}
+		}
+		if (! ($line_item instanceof \EE_Line_Item && $line_item->OBJ_type() === 'Ticket')) {
+			throw new EntityNotFoundException('Line Item Ticket ID', $ticket->ID());
+		}
+		return $line_item;
+	}
+
+
+	/**
+	 * Soft Deletes this model object.
+	 *
+	 * @param string $source function name that called this method
+	 * @return boolean | int
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function delete()
+	{
+		if ($this->update_extra_meta(EE_Registration::PRE_TRASH_REG_STATUS_KEY, $this->status_ID()) === true) {
+			$this->set_status(EEM_Registration::status_id_cancelled);
+		}
+		return parent::delete();
+	}
+
+
+	/**
+	 * Restores whatever the previous status was on a registration before it was trashed (if possible)
+	 *
+	 * @param string $source function name that called this method
+	 * @return bool|int
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function restore()
+	{
+		$previous_status = $this->get_extra_meta(
+			EE_Registration::PRE_TRASH_REG_STATUS_KEY,
+			true,
+			EEM_Registration::status_id_cancelled
+		);
+		if ($previous_status) {
+			$this->delete_extra_meta(EE_Registration::PRE_TRASH_REG_STATUS_KEY);
+			$this->set_status($previous_status);
+		}
+		return parent::restore();
+	}
+
+
+	/**
+	 * possibly toggle Registration status based on comparison of REG_paid vs REG_final_price
+	 *
+	 * @param  boolean $trigger_set_status_logic EE_Registration::set_status() can trigger additional logic
+	 *                                           depending on whether the reg status changes to or from "Approved"
+	 * @return boolean whether the Registration status was updated
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws UnexpectedEntityException
+	 */
+	public function updateStatusBasedOnTotalPaid($trigger_set_status_logic = true)
+	{
+		$paid = $this->paid();
+		$price = $this->final_price();
+		switch (true) {
+			// overpaid or paid
+			case EEH_Money::compare_floats($paid, $price, '>'):
+			case EEH_Money::compare_floats($paid, $price):
+				$new_status = EEM_Registration::status_id_approved;
+				break;
+			//  underpaid
+			case EEH_Money::compare_floats($paid, $price, '<'):
+				$new_status = EEM_Registration::status_id_pending_payment;
+				break;
+			// uhhh Houston...
+			default:
+				throw new RuntimeException(
+					esc_html__('The total paid calculation for this registration is inaccurate.', 'event_espresso')
+				);
+		}
+		if ($new_status !== $this->status_ID()) {
+			if ($trigger_set_status_logic) {
+				return $this->set_status($new_status);
+			}
+			parent::set('STS_ID', $new_status);
+			return true;
+		}
+		return false;
+	}
+
+
+	/*************************** DEPRECATED ***************************/
+
+
+	/**
+	 * @deprecated
+	 * @since     4.7.0
+	 */
+	public function price_paid()
+	{
+		EE_Error::doing_it_wrong(
+			'EE_Registration::price_paid()',
+			esc_html__(
+				'This method is deprecated, please use EE_Registration::final_price() instead.',
+				'event_espresso'
+			),
+			'4.7.0'
+		);
+		return $this->final_price();
+	}
+
+
+	/**
+	 * @deprecated
+	 * @since     4.7.0
+	 * @param    float $REG_final_price
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws DomainException
+	 */
+	public function set_price_paid($REG_final_price = 0.00)
+	{
+		EE_Error::doing_it_wrong(
+			'EE_Registration::set_price_paid()',
+			esc_html__(
+				'This method is deprecated, please use EE_Registration::set_final_price() instead.',
+				'event_espresso'
+			),
+			'4.7.0'
+		);
+		$this->set_final_price($REG_final_price);
+	}
+
+
+	/**
+	 * @deprecated
+	 * @since 4.7.0
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_price_paid()
+	{
+		EE_Error::doing_it_wrong(
+			'EE_Registration::pretty_price_paid()',
+			esc_html__(
+				'This method is deprecated, please use EE_Registration::pretty_final_price() instead.',
+				'event_espresso'
+			),
+			'4.7.0'
+		);
+		return $this->pretty_final_price();
+	}
+
+
+	/**
+	 * Gets the primary datetime related to this registration via the related Event to this registration
+	 *
+	 * @deprecated 4.9.17
+	 * @return EE_Datetime
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_related_primary_datetime()
+	{
+		EE_Error::doing_it_wrong(
+			__METHOD__,
+			esc_html__(
+				'Use EE_Registration::get_latest_related_datetime() or EE_Registration::get_earliest_related_datetime()',
+				'event_espresso'
+			),
+			'4.9.17',
+			'5.0.0'
+		);
+		return $this->event()->primary_datetime();
+	}
+
+	/**
+	 * Returns the contact's name (or "Unknown" if there is no contact.)
+	 * @since 4.10.12.p
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function name()
+	{
+		return $this->attendeeName();
+	}
 }

admin_pages/venues/Venues_Admin_List_Table.class.php

Spacing +6 added lines, -6 removed lines

@@ -116,7 +116,7 @@ 
      */
     public function column_id(EE_Venue $venue): string
     {
-        return $venue->ID() . '  <span class="show-on-mobile-view-only">' . $venue->name() . '</span>';
+        return $venue->ID().'  <span class="show-on-mobile-view-only">'.$venue->name().'</span>';
     }
 
 
@@ -141,10 +141,10 @@ 
         $content = EE_Registry::instance()->CAP->current_user_can('ee_edit_venue', 'espresso_venues_edit', $venue->ID())
             ? '
             <strong>
-                <a class="row-title" href="' . $edit_link . '">' . stripslashes_deep($venue->name()) . '</a>
+                <a class="row-title" href="' . $edit_link.'">'.stripslashes_deep($venue->name()).'</a>
             </strong>'
             : $venue->name();
-        $content .= $venue->status() == 'draft' ? ' - <span class="post-state">' . $statuses['draft'] . '</span>' : '';
+        $content .= $venue->status() == 'draft' ? ' - <span class="post-state">'.$statuses['draft'].'</span>' : '';
         $content .= $this->row_actions(array_filter($actions));
         return $content;
     }
@@ -183,7 +183,7 @@ 
                 );
             }
         } else {
-            $actions['view']        = $this->getVenueActionLink(
+            $actions['view'] = $this->getVenueActionLink(
                 $venue,
                 'view',
                 esc_html__('View', 'event_espresso'),
@@ -193,7 +193,7 @@ 
                 '',
                 get_permalink($venue->ID())
             );
-            $actions['edit']        = $this->getVenueActionLink(
+            $actions['edit'] = $this->getVenueActionLink(
                 $venue,
                 'edit',
                 esc_html__('Edit', 'event_espresso'),
@@ -254,7 +254,7 @@ 
      */
     public function column_shortcode(EE_Venue $venue): string
     {
-        return '[ESPRESSO_VENUE id=' . $venue->ID() . ']';
+        return '[ESPRESSO_VENUE id='.$venue->ID().']';
     }
 
 

Indentation +281 added lines, -281 removed lines

@@ -13,289 +13,289 @@
  */
 class Venues_Admin_List_Table extends EE_Admin_List_Table
 {
-    /**
-     * @var   int
-     */
-    private $related_event_count = 0;
-
-
-    /**
-     * @param $admin_page
-     */
-    public function __construct($admin_page)
-    {
-        parent::__construct($admin_page);
-    }
-
-
-    protected function _setup_data()
-    {
-        $this->_data = $this->_admin_page->get_venues($this->_per_page);
-        $this->_all_data_count = $this->_admin_page->get_venues($this->_per_page, true);
-    }
-
-
-    protected function _set_properties()
-    {
-        $this->_wp_list_args = array(
-            'singular' => esc_html__('Event Venue', 'event_espresso'),
-            'plural'   => esc_html__('Event Venues', 'event_espresso'),
-            'ajax'     => true, // for now,
-            'screen'   => $this->_admin_page->get_current_screen()->id,
-        );
-
-        $this->_columns = array(
-            'cb'       => '<input type="checkbox" />',
-            'id'       => esc_html__('ID', 'event_espresso'),
-            'name'     => esc_html__('Name', 'event_espresso'),
-            'address'  => esc_html__('Address', 'event_espresso'),
-            'city'     => esc_html__('City', 'event_espresso'),
-            'capacity' => esc_html__('Capacity', 'event_espresso'),
-            // 'shortcode' => esc_html__('Shortcode', 'event_espresso'),
-        );
-
-        $this->_sortable_columns = array(
-            'id'       => array('id' => true),
-            'name'     => array('name' => false),
-            'city'     => array('city' => false),
-            'capacity' => array('capacity' => false),
-        );
-
-        $this->_hidden_columns = array();
-    }
-
-
-    // todo... add _venue_status in here (which we'll define a EE_Admin_CPT_List_Table for common properties)
-
-
-    /**
-     * @return array
-     */
-    protected function _get_table_filters(): array
-    {
-        return array();
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _add_view_counts()
-    {
-        $this->_views['all']['count'] = EEM_Venue::instance()->count();
-        if (EE_Registry::instance()->CAP->current_user_can('ee_delete_venues', 'espresso_venues_trash_venues')) {
-            $this->_views['trash']['count'] = EEM_Venue::instance()->count_deleted();
-        }
-    }
-
-
-    /**
-     * @param EE_Venue|null $venue
-     * @return string
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function column_cb($venue): string
-    {
-        $this->related_event_count = $venue->count_related('Event');
-        return $this->related_event_count > 0 && $venue->status() === 'trash'
-            ? '<span class="ee-lock-icon"></span>'
-            : sprintf(
-                '<input type="checkbox" name="venue_id[]" value="%s" />',
-                $venue->ID()
-            );
-    }
-
-
-    /**
-     * @param EE_Venue $venue
-     * @return string
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function column_id(EE_Venue $venue): string
-    {
-        return $venue->ID() . '  <span class="show-on-mobile-view-only">' . $venue->name() . '</span>';
-    }
-
-
-    /**
-     * @param EE_Venue $venue
-     * @return string
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function column_name(EE_Venue $venue): string
-    {
-        $edit_link = EE_Admin_Page::add_query_args_and_nonce(
-            [
-                'action' => 'edit',
-                'post'   => $venue->ID(),
-            ],
-            EE_VENUES_ADMIN_URL
-        );
-
-        $statuses = EEM_Venue::instance()->get_status_array();
-        $actions = $this->_column_name_action_setup($venue);
-        $content = EE_Registry::instance()->CAP->current_user_can('ee_edit_venue', 'espresso_venues_edit', $venue->ID())
-            ? '
+	/**
+	 * @var   int
+	 */
+	private $related_event_count = 0;
+
+
+	/**
+	 * @param $admin_page
+	 */
+	public function __construct($admin_page)
+	{
+		parent::__construct($admin_page);
+	}
+
+
+	protected function _setup_data()
+	{
+		$this->_data = $this->_admin_page->get_venues($this->_per_page);
+		$this->_all_data_count = $this->_admin_page->get_venues($this->_per_page, true);
+	}
+
+
+	protected function _set_properties()
+	{
+		$this->_wp_list_args = array(
+			'singular' => esc_html__('Event Venue', 'event_espresso'),
+			'plural'   => esc_html__('Event Venues', 'event_espresso'),
+			'ajax'     => true, // for now,
+			'screen'   => $this->_admin_page->get_current_screen()->id,
+		);
+
+		$this->_columns = array(
+			'cb'       => '<input type="checkbox" />',
+			'id'       => esc_html__('ID', 'event_espresso'),
+			'name'     => esc_html__('Name', 'event_espresso'),
+			'address'  => esc_html__('Address', 'event_espresso'),
+			'city'     => esc_html__('City', 'event_espresso'),
+			'capacity' => esc_html__('Capacity', 'event_espresso'),
+			// 'shortcode' => esc_html__('Shortcode', 'event_espresso'),
+		);
+
+		$this->_sortable_columns = array(
+			'id'       => array('id' => true),
+			'name'     => array('name' => false),
+			'city'     => array('city' => false),
+			'capacity' => array('capacity' => false),
+		);
+
+		$this->_hidden_columns = array();
+	}
+
+
+	// todo... add _venue_status in here (which we'll define a EE_Admin_CPT_List_Table for common properties)
+
+
+	/**
+	 * @return array
+	 */
+	protected function _get_table_filters(): array
+	{
+		return array();
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _add_view_counts()
+	{
+		$this->_views['all']['count'] = EEM_Venue::instance()->count();
+		if (EE_Registry::instance()->CAP->current_user_can('ee_delete_venues', 'espresso_venues_trash_venues')) {
+			$this->_views['trash']['count'] = EEM_Venue::instance()->count_deleted();
+		}
+	}
+
+
+	/**
+	 * @param EE_Venue|null $venue
+	 * @return string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function column_cb($venue): string
+	{
+		$this->related_event_count = $venue->count_related('Event');
+		return $this->related_event_count > 0 && $venue->status() === 'trash'
+			? '<span class="ee-lock-icon"></span>'
+			: sprintf(
+				'<input type="checkbox" name="venue_id[]" value="%s" />',
+				$venue->ID()
+			);
+	}
+
+
+	/**
+	 * @param EE_Venue $venue
+	 * @return string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function column_id(EE_Venue $venue): string
+	{
+		return $venue->ID() . '  <span class="show-on-mobile-view-only">' . $venue->name() . '</span>';
+	}
+
+
+	/**
+	 * @param EE_Venue $venue
+	 * @return string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function column_name(EE_Venue $venue): string
+	{
+		$edit_link = EE_Admin_Page::add_query_args_and_nonce(
+			[
+				'action' => 'edit',
+				'post'   => $venue->ID(),
+			],
+			EE_VENUES_ADMIN_URL
+		);
+
+		$statuses = EEM_Venue::instance()->get_status_array();
+		$actions = $this->_column_name_action_setup($venue);
+		$content = EE_Registry::instance()->CAP->current_user_can('ee_edit_venue', 'espresso_venues_edit', $venue->ID())
+			? '
             <strong>
                 <a class="row-title" href="' . $edit_link . '">' . stripslashes_deep($venue->name()) . '</a>
             </strong>'
-            : $venue->name();
-        $content .= $venue->status() == 'draft' ? ' - <span class="post-state">' . $statuses['draft'] . '</span>' : '';
-        $content .= $this->row_actions(array_filter($actions));
-        return $content;
-    }
-
-
-    /**
-     * Used to setup the actions for the Venue name column
-     *
-     * @param EE_Venue $venue
-     * @return array()
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _column_name_action_setup(EE_Venue $venue): array
-    {
-        $actions = [];
-        if ($venue->status() === 'trash') {
-            $actions['restore_venue'] = $this->getVenueActionLink(
-                $venue,
-                'restore_venue',
-                esc_html__('Restore from Trash', 'event_espresso'),
-                /* Translators: The name of the venue */
-                esc_attr__('Restore Venue (%s) from Trash', 'event_espresso'),
-                'ee_delete_venue',
-                'espresso_venues_restore_venue'
-            );
-            if ($this->related_event_count === 0) {
-                $actions['delete_venue'] = $this->getVenueActionLink(
-                    $venue,
-                    'delete_venue',
-                    esc_html__('Delete Permanently', 'event_espresso'),
-                    /* Translators: The name of the venue */
-                    esc_attr__('Permanently Delete Venue (%s)', 'event_espresso'),
-                    'ee_delete_venue',
-                    'espresso_venues_delete_venue'
-                );
-            }
-        } else {
-            $actions['view']        = $this->getVenueActionLink(
-                $venue,
-                'view',
-                esc_html__('View', 'event_espresso'),
-                /* Translators: The name of the venue */
-                esc_attr__('View Venue (%s)', 'event_espresso'),
-                '',
-                '',
-                get_permalink($venue->ID())
-            );
-            $actions['edit']        = $this->getVenueActionLink(
-                $venue,
-                'edit',
-                esc_html__('Edit', 'event_espresso'),
-                /* Translators: The name of the venue */
-                esc_attr__('Edit Venue (%s)', 'event_espresso'),
-                'ee_edit_venue',
-                'espresso_venues_edit'
-            );
-            $actions['trash_venue'] = $this->getVenueActionLink(
-                $venue,
-                'trash_venue',
-                esc_html__('Trash', 'event_espresso'),
-                /* Translators: The name of the venue */
-                esc_attr__('Trash Venue (%s)', 'event_espresso'),
-                'ee_delete_venue',
-                'espresso_venues_trash_venue'
-            );
-        }
-        return $actions;
-    }
-
-
-    /**
-     * @param EE_Venue $venue
-     * @return string
-     */
-    public function column_address(EE_Venue $venue): string
-    {
-        return $venue->address();
-    }
-
-
-    /**
-     * @param EE_Venue $venue
-     * @return string
-     */
-    public function column_city(EE_Venue $venue): string
-    {
-        return $venue->city();
-    }
-
-
-    /**
-     * @param EE_Venue $venue
-     * @return int|string
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function column_capacity(EE_Venue $venue)
-    {
-        return $venue->capacity();
-    }
-
-
-    /**
-     * @param EE_Venue $venue
-     * @return string
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function column_shortcode(EE_Venue $venue): string
-    {
-        return '[ESPRESSO_VENUE id=' . $venue->ID() . ']';
-    }
-
-
-    /**
-     * @param EE_Venue    $venue
-     * @param string      $action
-     * @param string      $link_text
-     * @param string      $aria_label
-     * @param string      $cap
-     * @param string      $context
-     * @param string|null $action_url
-     * @return string
-     * @throws EE_Error
-     * @throws ReflectionException
-     * @since 4.10.38.p
-     */
-    public function getVenueActionLink(
-        EE_Venue $venue,
-        string $action,
-        string $link_text,
-        string $aria_label,
-        string $cap,
-        string $context,
-        ?string $action_url = null
-    ): string {
-        if ($cap && ! EE_Registry::instance()->CAP->current_user_can($cap, $context, $venue->ID())) {
-            return '';
-        }
-        $key = $action === 'edit' ? 'post' : 'VNU_ID';
-        // if supplied an $action_url, then use that, otherwise build one using the $action param
-        $action_url = $action_url
-            ?: EE_Admin_Page::add_query_args_and_nonce(
-                [
-                    'action' => $action,
-                    $key     => $venue->ID(),
-                ],
-                EE_VENUES_ADMIN_URL
-            );
-        $aria_label = sprintf($aria_label, $venue->name());
-        return "
+			: $venue->name();
+		$content .= $venue->status() == 'draft' ? ' - <span class="post-state">' . $statuses['draft'] . '</span>' : '';
+		$content .= $this->row_actions(array_filter($actions));
+		return $content;
+	}
+
+
+	/**
+	 * Used to setup the actions for the Venue name column
+	 *
+	 * @param EE_Venue $venue
+	 * @return array()
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _column_name_action_setup(EE_Venue $venue): array
+	{
+		$actions = [];
+		if ($venue->status() === 'trash') {
+			$actions['restore_venue'] = $this->getVenueActionLink(
+				$venue,
+				'restore_venue',
+				esc_html__('Restore from Trash', 'event_espresso'),
+				/* Translators: The name of the venue */
+				esc_attr__('Restore Venue (%s) from Trash', 'event_espresso'),
+				'ee_delete_venue',
+				'espresso_venues_restore_venue'
+			);
+			if ($this->related_event_count === 0) {
+				$actions['delete_venue'] = $this->getVenueActionLink(
+					$venue,
+					'delete_venue',
+					esc_html__('Delete Permanently', 'event_espresso'),
+					/* Translators: The name of the venue */
+					esc_attr__('Permanently Delete Venue (%s)', 'event_espresso'),
+					'ee_delete_venue',
+					'espresso_venues_delete_venue'
+				);
+			}
+		} else {
+			$actions['view']        = $this->getVenueActionLink(
+				$venue,
+				'view',
+				esc_html__('View', 'event_espresso'),
+				/* Translators: The name of the venue */
+				esc_attr__('View Venue (%s)', 'event_espresso'),
+				'',
+				'',
+				get_permalink($venue->ID())
+			);
+			$actions['edit']        = $this->getVenueActionLink(
+				$venue,
+				'edit',
+				esc_html__('Edit', 'event_espresso'),
+				/* Translators: The name of the venue */
+				esc_attr__('Edit Venue (%s)', 'event_espresso'),
+				'ee_edit_venue',
+				'espresso_venues_edit'
+			);
+			$actions['trash_venue'] = $this->getVenueActionLink(
+				$venue,
+				'trash_venue',
+				esc_html__('Trash', 'event_espresso'),
+				/* Translators: The name of the venue */
+				esc_attr__('Trash Venue (%s)', 'event_espresso'),
+				'ee_delete_venue',
+				'espresso_venues_trash_venue'
+			);
+		}
+		return $actions;
+	}
+
+
+	/**
+	 * @param EE_Venue $venue
+	 * @return string
+	 */
+	public function column_address(EE_Venue $venue): string
+	{
+		return $venue->address();
+	}
+
+
+	/**
+	 * @param EE_Venue $venue
+	 * @return string
+	 */
+	public function column_city(EE_Venue $venue): string
+	{
+		return $venue->city();
+	}
+
+
+	/**
+	 * @param EE_Venue $venue
+	 * @return int|string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function column_capacity(EE_Venue $venue)
+	{
+		return $venue->capacity();
+	}
+
+
+	/**
+	 * @param EE_Venue $venue
+	 * @return string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function column_shortcode(EE_Venue $venue): string
+	{
+		return '[ESPRESSO_VENUE id=' . $venue->ID() . ']';
+	}
+
+
+	/**
+	 * @param EE_Venue    $venue
+	 * @param string      $action
+	 * @param string      $link_text
+	 * @param string      $aria_label
+	 * @param string      $cap
+	 * @param string      $context
+	 * @param string|null $action_url
+	 * @return string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 * @since 4.10.38.p
+	 */
+	public function getVenueActionLink(
+		EE_Venue $venue,
+		string $action,
+		string $link_text,
+		string $aria_label,
+		string $cap,
+		string $context,
+		?string $action_url = null
+	): string {
+		if ($cap && ! EE_Registry::instance()->CAP->current_user_can($cap, $context, $venue->ID())) {
+			return '';
+		}
+		$key = $action === 'edit' ? 'post' : 'VNU_ID';
+		// if supplied an $action_url, then use that, otherwise build one using the $action param
+		$action_url = $action_url
+			?: EE_Admin_Page::add_query_args_and_nonce(
+				[
+					'action' => $action,
+					$key     => $venue->ID(),
+				],
+				EE_VENUES_ADMIN_URL
+			);
+		$aria_label = sprintf($aria_label, $venue->name());
+		return "
         <a href='$action_url' aria-label='$aria_label'>$link_text</a>";
-    }
+	}
 }

modules/single_page_checkout/reg_steps/payment_options/EE_SPCO_Reg_Step_Payment_Options.class.php

Indentation +2828 added lines, -2828 removed lines

@@ -19,2832 +19,2832 @@
  */
 class EE_SPCO_Reg_Step_Payment_Options extends EE_SPCO_Reg_Step
 {
-    /**
-     * @var EE_Line_Item_Display $Line_Item_Display
-     */
-    protected $line_item_display;
-
-    /**
-     * @var boolean $handle_IPN_in_this_request
-     */
-    protected $handle_IPN_in_this_request = false;
-
-
-    /**
-     *    set_hooks - for hooking into EE Core, other modules, etc
-     *
-     * @access    public
-     * @return    void
-     */
-    public static function set_hooks()
-    {
-        add_filter(
-            'FHEE__SPCO__EE_Line_Item_Filter_Collection',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'add_spco_line_item_filters']
-        );
-        add_action(
-            'wp_ajax_switch_spco_billing_form',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'switch_spco_billing_form']
-        );
-        add_action(
-            'wp_ajax_nopriv_switch_spco_billing_form',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'switch_spco_billing_form']
-        );
-        add_action('wp_ajax_save_payer_details', ['EE_SPCO_Reg_Step_Payment_Options', 'save_payer_details']);
-        add_action(
-            'wp_ajax_nopriv_save_payer_details',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'save_payer_details']
-        );
-        add_action(
-            'wp_ajax_get_transaction_details_for_gateways',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'get_transaction_details']
-        );
-        add_action(
-            'wp_ajax_nopriv_get_transaction_details_for_gateways',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'get_transaction_details']
-        );
-        add_filter(
-            'FHEE__EED_Recaptcha___bypass_recaptcha__bypass_request_params_array',
-            ['EE_SPCO_Reg_Step_Payment_Options', 'bypass_recaptcha_for_load_payment_method'],
-            10,
-            1
-        );
-    }
-
-
-    /**
-     *    ajax switch_spco_billing_form
-     *
-     */
-    public static function switch_spco_billing_form()
-    {
-        EED_Single_Page_Checkout::process_ajax_request('switch_payment_method');
-    }
-
-
-    /**
-     *    ajax save_payer_details
-     *
-     */
-    public static function save_payer_details()
-    {
-        EED_Single_Page_Checkout::process_ajax_request('save_payer_details_via_ajax');
-    }
-
-
-    /**
-     *    ajax get_transaction_details
-     *
-     */
-    public static function get_transaction_details()
-    {
-        EED_Single_Page_Checkout::process_ajax_request('get_transaction_details_for_gateways');
-    }
-
-
-    /**
-     * bypass_recaptcha_for_load_payment_method
-     *
-     * @access public
-     * @return array
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public static function bypass_recaptcha_for_load_payment_method()
-    {
-        return [
-            'EESID'  => EE_Registry::instance()->SSN->id(),
-            'step'   => 'payment_options',
-            'action' => 'spco_billing_form',
-        ];
-    }
-
-
-    /**
-     *    class constructor
-     *
-     * @access    public
-     * @param EE_Checkout $checkout
-     */
-    public function __construct(EE_Checkout $checkout)
-    {
-        $this->request   = EED_Single_Page_Checkout::getRequest();
-        $this->_slug     = 'payment_options';
-        $this->_name     = esc_html__('Payment Options', 'event_espresso');
-        $this->_template = SPCO_REG_STEPS_PATH . $this->_slug . '/payment_options_main.template.php';
-        $this->checkout  = $checkout;
-        $this->_reset_success_message();
-        $this->set_instructions(
-            esc_html__(
-                'Please select a method of payment and provide any necessary billing information before proceeding.',
-                'event_espresso'
-            )
-        );
-    }
-
-
-    /**
-     * @return null
-     */
-    public function line_item_display()
-    {
-        return $this->line_item_display;
-    }
-
-
-    /**
-     * @param null $line_item_display
-     */
-    public function set_line_item_display($line_item_display)
-    {
-        $this->line_item_display = $line_item_display;
-    }
-
-
-    /**
-     * @return boolean
-     */
-    public function handle_IPN_in_this_request()
-    {
-        return $this->handle_IPN_in_this_request;
-    }
-
-
-    /**
-     * @param boolean $handle_IPN_in_this_request
-     */
-    public function set_handle_IPN_in_this_request($handle_IPN_in_this_request)
-    {
-        $this->handle_IPN_in_this_request = filter_var($handle_IPN_in_this_request, FILTER_VALIDATE_BOOLEAN);
-    }
-
-
-    /**
-     * translate_js_strings
-     *
-     * @return void
-     */
-    public function translate_js_strings()
-    {
-        EE_Registry::$i18n_js_strings['no_payment_method']      = esc_html__(
-            'Please select a method of payment in order to continue.',
-            'event_espresso'
-        );
-        EE_Registry::$i18n_js_strings['invalid_payment_method'] = esc_html__(
-            'A valid method of payment could not be determined. Please refresh the page and try again.',
-            'event_espresso'
-        );
-        EE_Registry::$i18n_js_strings['forwarding_to_offsite']  = esc_html__(
-            'Forwarding to Secure Payment Provider.',
-            'event_espresso'
-        );
-    }
-
-
-    /**
-     * enqueue_styles_and_scripts
-     *
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function enqueue_styles_and_scripts()
-    {
-        $transaction = $this->checkout->transaction;
-        // if the transaction isn't set or nothing is owed on it, don't enqueue any JS
-        if (! $transaction instanceof EE_Transaction || EEH_Money::compare_floats($transaction->remaining(), 0)) {
-            return;
-        }
-        foreach (
-            EEM_Payment_Method::instance()->get_all_for_transaction(
-                $transaction,
-                EEM_Payment_Method::scope_cart
-            ) as $payment_method
-        ) {
-            $type_obj = $payment_method->type_obj();
-            if ($type_obj instanceof EE_PMT_Base) {
-                $billing_form = $type_obj->generate_new_billing_form($transaction);
-                if ($billing_form instanceof EE_Form_Section_Proper) {
-                    $billing_form->enqueue_js();
-                }
-            }
-        }
-    }
-
-
-    /**
-     * initialize_reg_step
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function initialize_reg_step()
-    {
-        // TODO: if /when we implement donations, then this will need overriding
-        if (
-            // don't need payment options for:
-            // registrations made via the admin
-            // completed transactions
-            // overpaid transactions
-            // $ 0.00 transactions(no payment required)
-            ! $this->checkout->payment_required()
-            // but do NOT remove if current action being called belongs to this reg step
-            && ! is_callable([$this, $this->checkout->action])
-            && ! $this->completed()
-        ) {
-            // and if so, then we no longer need the Payment Options step
-            if ($this->is_current_step()) {
-                $this->checkout->generate_reg_form = false;
-            }
-            $this->checkout->remove_reg_step($this->_slug);
-            // DEBUG LOG
-            // $this->checkout->log( __CLASS__, __FUNCTION__, __LINE__ );
-            return false;
-        }
-        // load EEM_Payment_Method
-        EE_Registry::instance()->load_model('Payment_Method');
-        // get all active payment methods
-        $this->checkout->available_payment_methods = EEM_Payment_Method::instance()->get_all_for_transaction(
-            $this->checkout->transaction,
-            EEM_Payment_Method::scope_cart
-        );
-        return true;
-    }
-
-
-    /**
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws EntityNotFoundException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidStatusException
-     */
-    public function generate_reg_form()
-    {
-        // reset in case someone changes their mind
-        $this->_reset_selected_method_of_payment();
-        // set some defaults
-        $this->checkout->selected_method_of_payment = 'payments_closed';
-        $registrations_requiring_payment            = [];
-        $registrations_for_free_events              = [];
-        $registrations_requiring_pre_approval       = [];
-        $sold_out_events                            = [];
-        $insufficient_spaces_available              = [];
-        $no_payment_required                        = true;
-        // loop thru registrations to gather info
-        $registrations         = $this->checkout->transaction->registrations($this->checkout->reg_cache_where_params);
-        $ejected_registrations = EE_SPCO_Reg_Step_Payment_Options::find_registrations_that_lost_their_space(
-            $registrations,
-            $this->checkout->revisit
-        );
-        foreach ($registrations as $REG_ID => $registration) {
-            /** @var $registration EE_Registration */
-            // has this registration lost it's space ?
-            if (isset($ejected_registrations[ $REG_ID ])) {
-                if ($registration->event()->is_sold_out() || $registration->event()->is_sold_out(true)) {
-                    $sold_out_events[ $registration->event()->ID() ] = $registration->event();
-                } else {
-                    $insufficient_spaces_available[ $registration->event()->ID() ] = $registration->event();
-                }
-                continue;
-            }
-            // event requires admin approval
-            if ($registration->status_ID() === EEM_Registration::status_id_not_approved) {
-                // add event to list of events with pre-approval reg status
-                $registrations_requiring_pre_approval[ $REG_ID ] = $registration;
-                do_action(
-                    'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__event_requires_pre_approval',
-                    $registration->event(),
-                    $this
-                );
-                continue;
-            }
-            if (
-                $this->checkout->revisit
-                && $registration->status_ID() !== EEM_Registration::status_id_approved
-                && (
-                    $registration->event()->is_sold_out()
-                    || $registration->event()->is_sold_out(true)
-                )
-            ) {
-                // add event to list of events that are sold out
-                $sold_out_events[ $registration->event()->ID() ] = $registration->event();
-                do_action(
-                    'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__sold_out_event',
-                    $registration->event(),
-                    $this
-                );
-                continue;
-            }
-            // are they allowed to pay now and is there monies owing?
-            if ($registration->owes_monies_and_can_pay()) {
-                $registrations_requiring_payment[ $REG_ID ] = $registration;
-                do_action(
-                    'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__event_requires_payment',
-                    $registration->event(),
-                    $this
-                );
-            } elseif (
-                ! $this->checkout->revisit
-                      && $registration->status_ID() !== EEM_Registration::status_id_not_approved
-                      && $registration->ticket()->is_free()
-            ) {
-                $registrations_for_free_events[ $registration->ticket()->ID() ] = $registration;
-            }
-        }
-        $subsections = [];
-        // now decide which template to load
-        if (! empty($sold_out_events)) {
-            $subsections['sold_out_events'] = $this->_sold_out_events($sold_out_events);
-        }
-        if (! empty($insufficient_spaces_available)) {
-            $subsections['insufficient_space'] = $this->_insufficient_spaces_available(
-                $insufficient_spaces_available
-            );
-        }
-        if (! empty($registrations_requiring_pre_approval)) {
-            $subsections['registrations_requiring_pre_approval'] = $this->_registrations_requiring_pre_approval(
-                $registrations_requiring_pre_approval
-            );
-        }
-        if (! empty($registrations_for_free_events)) {
-            $subsections['no_payment_required'] = $this->_no_payment_required($registrations_for_free_events);
-        }
-        if (! empty($registrations_requiring_payment)) {
-            if ($this->checkout->amount_owing > 0) {
-                // autoload Line_Item_Display classes
-                EEH_Autoloader::register_line_item_filter_autoloaders();
-                $line_item_filter_processor = new EE_Line_Item_Filter_Processor(
-                    apply_filters(
-                        'FHEE__SPCO__EE_Line_Item_Filter_Collection',
-                        new EE_Line_Item_Filter_Collection()
-                    ),
-                    $this->checkout->cart->get_grand_total()
-                );
-                /** @var EE_Line_Item $filtered_line_item_tree */
-                $filtered_line_item_tree = $line_item_filter_processor->process();
-                EEH_Autoloader::register_line_item_display_autoloaders();
-                $this->set_line_item_display(new EE_Line_Item_Display('spco'));
-                $subsections['payment_options'] = $this->_display_payment_options(
-                    $this->line_item_display->display_line_item(
-                        $filtered_line_item_tree,
-                        ['registrations' => $registrations]
-                    )
-                );
-                $this->checkout->amount_owing   = $filtered_line_item_tree->total();
-                $this->_apply_registration_payments_to_amount_owing($registrations);
-            }
-            $no_payment_required = false;
-        } else {
-            $this->_hide_reg_step_submit_button_if_revisit();
-        }
-        $this->_save_selected_method_of_payment();
-
-        $subsections['default_hidden_inputs'] = $this->reg_step_hidden_inputs();
-        $subsections['extra_hidden_inputs']   = $this->_extra_hidden_inputs($no_payment_required);
-
-        return new EE_Form_Section_Proper(
-            [
-                'name'            => $this->reg_form_name(),
-                'html_id'         => $this->reg_form_name(),
-                'subsections'     => $subsections,
-                'layout_strategy' => new EE_No_Layout(),
-            ]
-        );
-    }
-
-
-    /**
-     * add line item filters required for this reg step
-     * these filters are applied via this line in EE_SPCO_Reg_Step_Payment_Options::set_hooks():
-     *        add_filter( 'FHEE__SPCO__EE_Line_Item_Filter_Collection', array( 'EE_SPCO_Reg_Step_Payment_Options',
-     *        'add_spco_line_item_filters' ) ); so any code that wants to use the same set of filters during the
-     *        payment options reg step, can apply these filters via the following: apply_filters(
-     *        'FHEE__SPCO__EE_Line_Item_Filter_Collection', new EE_Line_Item_Filter_Collection() ) or to an existing
-     *        filter collection by passing that instead of instantiating a new collection
-     *
-     * @param EE_Line_Item_Filter_Collection $line_item_filter_collection
-     * @return EE_Line_Item_Filter_Collection
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws EntityNotFoundException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidStatusException
-     */
-    public static function add_spco_line_item_filters(EE_Line_Item_Filter_Collection $line_item_filter_collection)
-    {
-        if (! EE_Registry::instance()->SSN instanceof EE_Session) {
-            return $line_item_filter_collection;
-        }
-        if (! EE_Registry::instance()->SSN->checkout() instanceof EE_Checkout) {
-            return $line_item_filter_collection;
-        }
-        if (! EE_Registry::instance()->SSN->checkout()->transaction instanceof EE_Transaction) {
-            return $line_item_filter_collection;
-        }
-        $line_item_filter_collection->add(
-            new EE_Billable_Line_Item_Filter(
-                EE_SPCO_Reg_Step_Payment_Options::remove_ejected_registrations(
-                    EE_Registry::instance()->SSN->checkout()->transaction->registrations(
-                        EE_Registry::instance()->SSN->checkout()->reg_cache_where_params
-                    )
-                )
-            )
-        );
-        $line_item_filter_collection->add(new EE_Non_Zero_Line_Item_Filter());
-        return $line_item_filter_collection;
-    }
-
-
-    /**
-     * remove_ejected_registrations
-     * if a registrant has lost their potential space at an event due to lack of payment,
-     * then this method removes them from the list of registrations being paid for during this request
-     *
-     * @param EE_Registration[] $registrations
-     * @return EE_Registration[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws EntityNotFoundException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidStatusException
-     */
-    public static function remove_ejected_registrations(array $registrations)
-    {
-        $ejected_registrations = EE_SPCO_Reg_Step_Payment_Options::find_registrations_that_lost_their_space(
-            $registrations,
-            EE_Registry::instance()->SSN->checkout()->revisit
-        );
-        foreach ($registrations as $REG_ID => $registration) {
-            // has this registration lost it's space ?
-            if (isset($ejected_registrations[ $REG_ID ])) {
-                unset($registrations[ $REG_ID ]);
-            }
-        }
-        return $registrations;
-    }
-
-
-    /**
-     * find_registrations_that_lost_their_space
-     * If a registrant chooses an offline payment method like Invoice,
-     * then no space is reserved for them at the event until they fully pay fo that site
-     * (unless the event's default reg status is set to APPROVED)
-     * if a registrant then later returns to pay, but the number of spaces available has been reduced due to sales,
-     * then this method will determine which registrations have lost the ability to complete the reg process.
-     *
-     * @param EE_Registration[] $registrations
-     * @param bool              $revisit
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws EntityNotFoundException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidStatusException
-     */
-    public static function find_registrations_that_lost_their_space(array $registrations, $revisit = false)
-    {
-        // registrations per event
-        $event_reg_count = [];
-        // spaces left per event
-        $event_spaces_remaining = [];
-        // tickets left sorted by ID
-        $tickets_remaining = [];
-        // registrations that have lost their space
-        $ejected_registrations = [];
-        foreach ($registrations as $REG_ID => $registration) {
-            if (
-                $registration->status_ID() === EEM_Registration::status_id_approved
-                || apply_filters(
-                    'FHEE__EE_SPCO_Reg_Step_Payment_Options__find_registrations_that_lost_their_space__allow_reg_payment',
-                    false,
-                    $registration,
-                    $revisit
-                )
-            ) {
-                continue;
-            }
-            $EVT_ID = $registration->event_ID();
-            $ticket = $registration->ticket();
-            if (! isset($tickets_remaining[ $ticket->ID() ])) {
-                $tickets_remaining[ $ticket->ID() ] = $ticket->remaining();
-            }
-            if ($tickets_remaining[ $ticket->ID() ] > 0) {
-                if (! isset($event_reg_count[ $EVT_ID ])) {
-                    $event_reg_count[ $EVT_ID ] = 0;
-                }
-                $event_reg_count[ $EVT_ID ]++;
-                if (! isset($event_spaces_remaining[ $EVT_ID ])) {
-                    $event_spaces_remaining[ $EVT_ID ] = $registration->event()->spaces_remaining_for_sale();
-                }
-            }
-            if (
-                $revisit
-                && ($tickets_remaining[ $ticket->ID() ] === 0
-                    || $event_reg_count[ $EVT_ID ] > $event_spaces_remaining[ $EVT_ID ]
-                )
-            ) {
-                $ejected_registrations[ $REG_ID ] = $registration->event();
-                if ($registration->status_ID() !== EEM_Registration::status_id_wait_list) {
-                    /** @type EE_Registration_Processor $registration_processor */
-                    $registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
-                    // at this point, we should have enough details about the registrant to consider the registration
-                    // NOT incomplete
-                    $registration_processor->manually_update_registration_status(
-                        $registration,
-                        EEM_Registration::status_id_wait_list
-                    );
-                }
-            }
-        }
-        return $ejected_registrations;
-    }
-
-
-    /**
-     * _hide_reg_step_submit_button
-     * removes the html for the reg step submit button
-     * by replacing it with an empty string via filter callback
-     *
-     * @return void
-     */
-    protected function _adjust_registration_status_if_event_old_sold()
-    {
-    }
-
-
-    /**
-     * _hide_reg_step_submit_button
-     * removes the html for the reg step submit button
-     * by replacing it with an empty string via filter callback
-     *
-     * @return void
-     */
-    protected function _hide_reg_step_submit_button_if_revisit()
-    {
-        if ($this->checkout->revisit) {
-            add_filter('FHEE__EE_SPCO_Reg_Step__reg_step_submit_button__sbmt_btn_html', '__return_empty_string');
-        }
-    }
-
-
-    /**
-     * sold_out_events
-     * displays notices regarding events that have sold out since hte registrant first signed up
-     *
-     * @param EE_Event[] $sold_out_events_array
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     */
-    private function _sold_out_events($sold_out_events_array = [])
-    {
-        // set some defaults
-        $this->checkout->selected_method_of_payment = 'events_sold_out';
-        $sold_out_events                            = '';
-        foreach ($sold_out_events_array as $sold_out_event) {
-            $sold_out_events .= EEH_HTML::li(
-                EEH_HTML::span(
-                    '  ' . $sold_out_event->name(),
-                    '',
-                    'dashicons dashicons-marker ee-icon-size-16 pink-text'
-                )
-            );
-        }
-        return new EE_Form_Section_Proper(
-            [
-                'layout_strategy' => new EE_Template_Layout(
-                    [
-                        'layout_template_file' => SPCO_REG_STEPS_PATH
-                                                  . $this->_slug
-                                                  . '/sold_out_events.template.php',
-                        'template_args'        => apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___sold_out_events__template_args',
-                            [
-                                'sold_out_events'     => $sold_out_events,
-                                'sold_out_events_msg' => apply_filters(
-                                    'FHEE__EE_SPCO_Reg_Step_Payment_Options___sold_out_events__sold_out_events_msg',
-                                    sprintf(
-                                        esc_html__(
-                                            'It appears that the event you were about to make a payment for has sold out since you first registered. If you have already made a partial payment towards this event, please contact the event administrator for a refund.%3$s%3$s%1$sPlease note that availability can change at any time due to cancellations, so please check back again later if registration for this event(s) is important to you.%2$s',
-                                            'event_espresso'
-                                        ),
-                                        '<strong>',
-                                        '</strong>',
-                                        '<br />'
-                                    )
-                                ),
-                            ]
-                        ),
-                    ]
-                ),
-            ]
-        );
-    }
-
-
-    /**
-     * _insufficient_spaces_available
-     * displays notices regarding events that do not have enough remaining spaces
-     * to satisfy the current number of registrations looking to pay
-     *
-     * @param EE_Event[] $insufficient_spaces_events_array
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    private function _insufficient_spaces_available($insufficient_spaces_events_array = [])
-    {
-        // set some defaults
-        $this->checkout->selected_method_of_payment = 'invoice';
-        $insufficient_space_events                  = '';
-        foreach ($insufficient_spaces_events_array as $event) {
-            if ($event instanceof EE_Event) {
-                $insufficient_space_events .= EEH_HTML::li(
-                    EEH_HTML::span(' ' . $event->name(), '', 'dashicons dashicons-marker ee-icon-size-16 pink-text')
-                );
-            }
-        }
-        return new EE_Form_Section_Proper(
-            [
-                'subsections'     => [
-                    'default_hidden_inputs' => $this->reg_step_hidden_inputs(),
-                    'extra_hidden_inputs'   => $this->_extra_hidden_inputs(),
-                ],
-                'layout_strategy' => new EE_Template_Layout(
-                    [
-                        'layout_template_file' => SPCO_REG_STEPS_PATH
-                                                  . $this->_slug
-                                                  . '/sold_out_events.template.php',
-                        'template_args'        => apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___insufficient_spaces_available__template_args',
-                            [
-                                'sold_out_events'     => $insufficient_space_events,
-                                'sold_out_events_msg' => apply_filters(
-                                    'FHEE__EE_SPCO_Reg_Step_Payment_Options___insufficient_spaces_available__insufficient_space_msg',
-                                    esc_html__(
-                                        'It appears that the event you were about to make a payment for has sold additional tickets since you first registered, and there are no longer enough spaces left to accommodate your selections. You may continue to pay and secure the available space(s) remaining, or simply cancel if you no longer wish to purchase. If you have already made a partial payment towards this event, please contact the event administrator for a refund.',
-                                        'event_espresso'
-                                    )
-                                ),
-                            ]
-                        ),
-                    ]
-                ),
-            ]
-        );
-    }
-
-
-    /**
-     * registrations_requiring_pre_approval
-     *
-     * @param array $registrations_requiring_pre_approval
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws EntityNotFoundException
-     * @throws ReflectionException
-     */
-    private function _registrations_requiring_pre_approval($registrations_requiring_pre_approval = [])
-    {
-        $events_requiring_pre_approval = [];
-        foreach ($registrations_requiring_pre_approval as $registration) {
-            if ($registration instanceof EE_Registration && $registration->event() instanceof EE_Event) {
-                $events_requiring_pre_approval[ $registration->event()->ID() ] = EEH_HTML::li(
-                    EEH_HTML::span(
-                        '',
-                        '',
-                        'dashicons dashicons-marker ee-icon-size-16 orange-text'
-                    )
-                    . EEH_HTML::span($registration->event()->name(), '', 'orange-text')
-                );
-            }
-        }
-        return new EE_Form_Section_Proper(
-            [
-                'layout_strategy' => new EE_Template_Layout(
-                    [
-                        'layout_template_file' => SPCO_REG_STEPS_PATH
-                                                  . $this->_slug
-                                                  . '/events_requiring_pre_approval.template.php', // layout_template
-                        'template_args'        => apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___sold_out_events__template_args',
-                            [
-                                'events_requiring_pre_approval'     => implode('', $events_requiring_pre_approval),
-                                'events_requiring_pre_approval_msg' => apply_filters(
-                                    'FHEE__EE_SPCO_Reg_Step_Payment_Options___events_requiring_pre_approval__events_requiring_pre_approval_msg',
-                                    esc_html__(
-                                        'The following events do not require payment at this time and will not be billed during this transaction. Billing will only occur after the attendee has been approved by the event organizer. You will be notified when your registration has been processed. If this is a free event, then no billing will occur.',
-                                        'event_espresso'
-                                    )
-                                ),
-                            ]
-                        ),
-                    ]
-                ),
-            ]
-        );
-    }
-
-
-    /**
-     * _no_payment_required
-     *
-     * @param EE_Event[] $registrations_for_free_events
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     */
-    private function _no_payment_required($registrations_for_free_events = [])
-    {
-        // set some defaults
-        $this->checkout->selected_method_of_payment = 'no_payment_required';
-        // generate no_payment_required form
-        return new EE_Form_Section_Proper(
-            [
-                'layout_strategy' => new EE_Template_Layout(
-                    [
-                        'layout_template_file' => SPCO_REG_STEPS_PATH
-                                                  . $this->_slug
-                                                  . '/no_payment_required.template.php', // layout_template
-                        'template_args'        => apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___no_payment_required__template_args',
-                            [
-                                'revisit'                       => $this->checkout->revisit,
-                                'registrations'                 => [],
-                                'ticket_count'                  => [],
-                                'registrations_for_free_events' => $registrations_for_free_events,
-                                'no_payment_required_msg'       => EEH_HTML::p(
-                                    esc_html__('This is a free event, so no billing will occur.', 'event_espresso')
-                                ),
-                            ]
-                        ),
-                    ]
-                ),
-            ]
-        );
-    }
-
-
-    /**
-     * _display_payment_options
-     *
-     * @param string $transaction_details
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _display_payment_options($transaction_details = '')
-    {
-        // has method_of_payment been set by no-js user?
-        $this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment();
-        // build payment options form
-        return apply_filters(
-            'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__payment_options_form',
-            new EE_Form_Section_Proper(
-                [
-                    'subsections'     => [
-                        'before_payment_options' => apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__before_payment_options',
-                            new EE_Form_Section_Proper(
-                                ['layout_strategy' => new EE_Div_Per_Section_Layout()]
-                            )
-                        ),
-                        'payment_options'        => $this->_setup_payment_options(),
-                        'after_payment_options'  => apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__after_payment_options',
-                            new EE_Form_Section_Proper(
-                                ['layout_strategy' => new EE_Div_Per_Section_Layout()]
-                            )
-                        ),
-                    ],
-                    'layout_strategy' => new EE_Template_Layout(
-                        [
-                            'layout_template_file' => $this->_template,
-                            'template_args'        => apply_filters(
-                                'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__template_args',
-                                [
-                                    'reg_count'                 => $this->line_item_display->total_items(),
-                                    'transaction_details'       => $transaction_details,
-                                    'available_payment_methods' => [],
-                                ]
-                            ),
-                        ]
-                    ),
-                ]
-            )
-        );
-    }
-
-
-    /**
-     * _extra_hidden_inputs
-     *
-     * @param bool $no_payment_required
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    private function _extra_hidden_inputs($no_payment_required = true)
-    {
-        return new EE_Form_Section_Proper(
-            [
-                'html_id'         => 'ee-' . $this->slug() . '-extra-hidden-inputs',
-                'layout_strategy' => new EE_Div_Per_Section_Layout(),
-                'subsections'     => [
-                    'spco_no_payment_required' => new EE_Hidden_Input(
-                        [
-                            'normalization_strategy' => new EE_Boolean_Normalization(),
-                            'html_name'              => 'spco_no_payment_required',
-                            'html_id'                => 'spco-no-payment-required-payment_options',
-                            'default'                => $no_payment_required,
-                        ]
-                    ),
-                    'spco_transaction_id'      => new EE_Fixed_Hidden_Input(
-                        [
-                            'normalization_strategy' => new EE_Int_Normalization(),
-                            'html_name'              => 'spco_transaction_id',
-                            'html_id'                => 'spco-transaction-id',
-                            'default'                => $this->checkout->transaction->ID(),
-                        ]
-                    ),
-                ],
-            ]
-        );
-    }
-
-
-    /**
-     *    _apply_registration_payments_to_amount_owing
-     *
-     * @param array $registrations
-     * @throws EE_Error
-     */
-    protected function _apply_registration_payments_to_amount_owing(array $registrations)
-    {
-        $payments = [];
-        foreach ($registrations as $registration) {
-            if ($registration instanceof EE_Registration && $registration->owes_monies_and_can_pay()) {
-                $payments += $registration->registration_payments();
-            }
-        }
-        if (! empty($payments)) {
-            foreach ($payments as $payment) {
-                if ($payment instanceof EE_Registration_Payment) {
-                    $this->checkout->amount_owing -= $payment->amount();
-                }
-            }
-        }
-    }
-
-
-    /**
-     *    _reset_selected_method_of_payment
-     *
-     * @access    private
-     * @param bool $force_reset
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _reset_selected_method_of_payment($force_reset = false)
-    {
-        /** @var RequestInterface $request */
-        $request              = LoaderFactory::getLoader()->getShared(RequestInterface::class);
-        $reset_payment_method = $request->getRequestParam('reset_payment_method', $force_reset, 'bool');
-        if ($reset_payment_method) {
-            $this->checkout->selected_method_of_payment = null;
-            $this->checkout->payment_method             = null;
-            $this->checkout->billing_form               = null;
-            $this->_save_selected_method_of_payment();
-        }
-    }
-
-
-    /**
-     * _save_selected_method_of_payment
-     * stores the selected_method_of_payment in the session
-     * so that it's available for all subsequent requests including AJAX
-     *
-     * @access        private
-     * @param string $selected_method_of_payment
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _save_selected_method_of_payment($selected_method_of_payment = '')
-    {
-        $selected_method_of_payment = ! empty($selected_method_of_payment)
-            ? $selected_method_of_payment
-            : $this->checkout->selected_method_of_payment;
-        EE_Registry::instance()->SSN->set_session_data(
-            ['selected_method_of_payment' => $selected_method_of_payment]
-        );
-    }
-
-
-    /**
-     * _setup_payment_options
-     *
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function _setup_payment_options()
-    {
-        // load payment method classes
-        $this->checkout->available_payment_methods = $this->_get_available_payment_methods();
-        if (empty($this->checkout->available_payment_methods)) {
-            EE_Error::add_error(
-                apply_filters(
-                    'FHEE__EE_SPCO_Reg_Step_Payment_Options___setup_payment_options__error_message_no_payment_methods',
-                    sprintf(
-                        esc_html__(
-                            'Sorry, you cannot complete your purchase because a payment method is not active.%1$s Please contact %2$s for assistance and provide a description of the problem.',
-                            'event_espresso'
-                        ),
-                        '<br>',
-                        EE_Registry::instance()->CFG->organization->get_pretty('email')
-                    )
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-        // switch up header depending on number of available payment methods
-        $payment_method_header     = count($this->checkout->available_payment_methods) > 1
-            ? apply_filters(
-                'FHEE__registration_page_payment_options__method_of_payment_hdr',
-                esc_html__('Please Select Your Method of Payment', 'event_espresso')
-            )
-            : apply_filters(
-                'FHEE__registration_page_payment_options__method_of_payment_hdr',
-                esc_html__('Method of Payment', 'event_espresso')
-            );
-        $available_payment_methods = [
-            // display the "Payment Method" header
-            'payment_method_header' => new EE_Form_Section_HTML(
-                apply_filters(
-                    'FHEE__EE_SPCO_Reg_Step_Payment_Options___setup_payment_options__payment_method_header',
-                    EEH_HTML::h4($payment_method_header, 'method-of-payment-hdr'),
-                    $payment_method_header
-                )
-            ),
-        ];
-        // the list of actual payment methods ( invoice, paypal, etc ) in a  ( slug => HTML )  format
-        $available_payment_method_options = [];
-        $default_payment_method_option    = [];
-        // additional instructions to be displayed and hidden below payment methods (adding a clearing div to start)
-        $payment_methods_billing_info = [
-            new EE_Form_Section_HTML(
-                EEH_HTML::div('<br />', '', '', 'clear:both;')
-            ),
-        ];
-        // loop through payment methods
-        foreach ($this->checkout->available_payment_methods as $payment_method) {
-            if ($payment_method instanceof EE_Payment_Method) {
-                $payment_method_button = EEH_HTML::img(
-                    $payment_method->button_url(),
-                    $payment_method->name(),
-                    'spco-payment-method-' . $payment_method->slug() . '-btn-img',
-                    'spco-payment-method-btn-img'
-                );
-                // check if any payment methods are set as default
-                // if payment method is already selected OR nothing is selected and this payment method should be
-                // open_by_default
-                if (
-                    ($this->checkout->selected_method_of_payment === $payment_method->slug())
-                    || (! $this->checkout->selected_method_of_payment && $payment_method->open_by_default())
-                ) {
-                    $this->checkout->selected_method_of_payment = $payment_method->slug();
-                    $this->_save_selected_method_of_payment();
-                    $default_payment_method_option[ $payment_method->slug() ] = $payment_method_button;
-                } else {
-                    $available_payment_method_options[ $payment_method->slug() ] = $payment_method_button;
-                }
-                $payment_methods_billing_info[ $payment_method->slug() . '-info' ] =
-                    $this->_payment_method_billing_info(
-                        $payment_method
-                    );
-            }
-        }
-        // prepend available_payment_method_options with default_payment_method_option so that it appears first in list
-        // of PMs
-        $available_payment_method_options = $default_payment_method_option + $available_payment_method_options;
-        // now generate the actual form  inputs
-        $available_payment_methods['available_payment_methods'] = $this->_available_payment_method_inputs(
-            $available_payment_method_options
-        );
-        $available_payment_methods                              += $payment_methods_billing_info;
-        // build the available payment methods form
-        return new EE_Form_Section_Proper(
-            [
-                'html_id'         => 'spco-available-methods-of-payment-dv',
-                'subsections'     => $available_payment_methods,
-                'layout_strategy' => new EE_Div_Per_Section_Layout(),
-            ]
-        );
-    }
-
-
-    /**
-     * _get_available_payment_methods
-     *
-     * @return EE_Payment_Method[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _get_available_payment_methods()
-    {
-        if (! empty($this->checkout->available_payment_methods)) {
-            return $this->checkout->available_payment_methods;
-        }
-        $available_payment_methods = [];
-        $EEM_Payment_Method        = EEM_Payment_Method::instance();
-        // get all active payment methods
-        $payment_methods = $EEM_Payment_Method->get_all_for_transaction(
-            $this->checkout->transaction,
-            EEM_Payment_Method::scope_cart
-        );
-        foreach ($payment_methods as $payment_method) {
-            if ($payment_method instanceof EE_Payment_Method) {
-                $available_payment_methods[ $payment_method->slug() ] = $payment_method;
-            }
-        }
-        return $available_payment_methods;
-    }
-
-
-    /**
-     *    _available_payment_method_inputs
-     *
-     * @access    private
-     * @param array $available_payment_method_options
-     * @return    EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws EE_Error
-     */
-    private function _available_payment_method_inputs($available_payment_method_options = [])
-    {
-        // generate inputs
-        return new EE_Form_Section_Proper(
-            [
-                'html_id'         => 'ee-available-payment-method-inputs',
-                'layout_strategy' => new EE_Div_Per_Section_Layout(),
-                'subsections'     => [
-                    '' => new EE_Radio_Button_Input(
-                        $available_payment_method_options,
-                        [
-                            'html_name'          => 'selected_method_of_payment',
-                            'html_class'         => 'spco-payment-method',
-                            'default'            => $this->checkout->selected_method_of_payment,
-                            'label_size'         => 11,
-                            'enforce_label_size' => true,
-                        ]
-                    ),
-                ],
-            ]
-        );
-    }
-
-
-    /**
-     *    _payment_method_billing_info
-     *
-     * @access    private
-     * @param EE_Payment_Method $payment_method
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _payment_method_billing_info(EE_Payment_Method $payment_method)
-    {
-        $currently_selected = $this->checkout->selected_method_of_payment === $payment_method->slug();
-        // generate the billing form for payment method
-        $billing_form                 = $currently_selected
-            ? $this->_get_billing_form_for_payment_method($payment_method)
-            : new EE_Form_Section_HTML();
-        $this->checkout->billing_form = $currently_selected
-            ? $billing_form
-            : $this->checkout->billing_form;
-        // it's all in the details
-        $info_html = EEH_HTML::h3(
-            esc_html__('Important information regarding your payment', 'event_espresso'),
-            '',
-            'spco-payment-method-hdr'
-        );
-        // add some info regarding the step, either from what's saved in the admin,
-        // or a default string depending on whether the PM has a billing form or not
-        if ($payment_method->description()) {
-            $payment_method_info = $payment_method->description();
-        } elseif ($billing_form instanceof EE_Billing_Info_Form) {
-            $payment_method_info = sprintf(
-                esc_html__(
-                    'Please provide the following billing information, then click the "%1$s" button below in order to proceed.',
-                    'event_espresso'
-                ),
-                $this->submit_button_text()
-            );
-        } else {
-            $payment_method_info = sprintf(
-                esc_html__('Please click the "%1$s" button below in order to proceed.', 'event_espresso'),
-                $this->submit_button_text()
-            );
-        }
-        $info_html .= EEH_HTML::div(
-            apply_filters(
-                'FHEE__EE_SPCO_Reg_Step_Payment_Options___payment_method_billing_info__payment_method_info',
-                $payment_method_info
-            ),
-            '',
-            'spco-payment-method-desc ee-attention'
-        );
-        return new EE_Form_Section_Proper(
-            [
-                'html_id'         => 'spco-payment-method-info-' . $payment_method->slug(),
-                'html_class'      => 'spco-payment-method-info-dv',
-                // only display the selected or default PM
-                'html_style'      => $currently_selected ? '' : 'display:none;',
-                'layout_strategy' => new EE_Div_Per_Section_Layout(),
-                'subsections'     => [
-                    'info'         => new EE_Form_Section_HTML($info_html),
-                    'billing_form' => $currently_selected ? $billing_form : new EE_Form_Section_HTML(),
-                ],
-            ]
-        );
-    }
-
-
-    /**
-     * get_billing_form_html_for_payment_method
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function get_billing_form_html_for_payment_method()
-    {
-        // how have they chosen to pay?
-        $this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
-        $this->checkout->payment_method             = $this->_get_payment_method_for_selected_method_of_payment();
-        if (! $this->checkout->payment_method instanceof EE_Payment_Method) {
-            return false;
-        }
-        if (
-            apply_filters(
-                'FHEE__EE_SPCO_Reg_Step_Payment_Options__registration_checkout__selected_payment_method__display_success',
-                false
-            )
-        ) {
-            EE_Error::add_success(
-                apply_filters(
-                    'FHEE__Single_Page_Checkout__registration_checkout__selected_payment_method',
-                    sprintf(
-                        esc_html__(
-                            'You have selected "%s" as your method of payment. Please note the important payment information below.',
-                            'event_espresso'
-                        ),
-                        $this->checkout->payment_method->name()
-                    )
-                )
-            );
-        }
-        // now generate billing form for selected method of payment
-        $payment_method_billing_form = $this->_get_billing_form_for_payment_method($this->checkout->payment_method);
-        // fill form with attendee info if applicable
-        if (
-            $payment_method_billing_form instanceof EE_Billing_Attendee_Info_Form
-            && $this->checkout->transaction_has_primary_registrant()
-        ) {
-            $payment_method_billing_form->populate_from_attendee(
-                $this->checkout->transaction->primary_registration()->attendee()
-            );
-        }
-        // and debug content
-        if (
-            $payment_method_billing_form instanceof EE_Billing_Info_Form
-            && $this->checkout->payment_method->type_obj() instanceof EE_PMT_Base
-        ) {
-            $payment_method_billing_form =
-                $this->checkout->payment_method->type_obj()->apply_billing_form_debug_settings(
-                    $payment_method_billing_form
-                );
-        }
-        $billing_info = $payment_method_billing_form instanceof EE_Form_Section_Proper
-            ? $payment_method_billing_form->get_html()
-            : '';
-        $this->checkout->json_response->set_return_data(['payment_method_info' => $billing_info]);
-        // localize validation rules for main form
-        $this->checkout->current_step->reg_form->localize_validation_rules();
-        $this->checkout->json_response->add_validation_rules(EE_Form_Section_Proper::js_localization());
-        return true;
-    }
-
-
-    /**
-     * _get_billing_form_for_payment_method
-     *
-     * @param EE_Payment_Method $payment_method
-     * @return EE_Billing_Info_Form|EE_Form_Section_HTML
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _get_billing_form_for_payment_method(EE_Payment_Method $payment_method)
-    {
-        $billing_form = $payment_method->type_obj()->billing_form(
-            $this->checkout->transaction,
-            ['amount_owing' => $this->checkout->amount_owing]
-        );
-        if ($billing_form instanceof EE_Billing_Info_Form) {
-            if (
-                apply_filters(
-                    'FHEE__EE_SPCO_Reg_Step_Payment_Options__registration_checkout__selected_payment_method__display_success',
-                    false
-                )
-                && $this->request->requestParamIsSet('payment_method')
-            ) {
-                EE_Error::add_success(
-                    apply_filters(
-                        'FHEE__Single_Page_Checkout__registration_checkout__selected_payment_method',
-                        sprintf(
-                            esc_html__(
-                                'You have selected "%s" as your method of payment. Please note the important payment information below.',
-                                'event_espresso'
-                            ),
-                            $payment_method->name()
-                        )
-                    )
-                );
-            }
-            return apply_filters(
-                'FHEE__EE_SPCO_Reg_Step_Payment_Options___get_billing_form_for_payment_method__billing_form',
-                $billing_form,
-                $payment_method
-            );
-        }
-        // no actual billing form, so return empty HTML form section
-        return new EE_Form_Section_HTML();
-    }
-
-
-    /**
-     * _get_selected_method_of_payment
-     *
-     * @param boolean $required whether to throw an error if the "selected_method_of_payment"
-     *                          is not found in the incoming request
-     * @param string  $request_param
-     * @return NULL|string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _get_selected_method_of_payment(
-        $required = false,
-        $request_param = 'selected_method_of_payment'
-    ) {
-        // is selected_method_of_payment set in the request ?
-        $selected_method_of_payment = $this->request->getRequestParam($request_param);
-        if ($selected_method_of_payment) {
-            // sanitize it
-            $selected_method_of_payment = is_array($selected_method_of_payment)
-                ? array_shift($selected_method_of_payment)
-                : $selected_method_of_payment;
-            $selected_method_of_payment = sanitize_text_field($selected_method_of_payment);
-            // store it in the session so that it's available for all subsequent requests including AJAX
-            $this->_save_selected_method_of_payment($selected_method_of_payment);
-        } else {
-            // or is is set in the session ?
-            $selected_method_of_payment = EE_Registry::instance()->SSN->get_session_data(
-                'selected_method_of_payment'
-            );
-        }
-        // do ya really really gotta have it?
-        if (empty($selected_method_of_payment) && $required) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'The selected method of payment could not be determined.%sPlease ensure that you have selected one before proceeding.%sIf you continue to experience difficulties, then refresh your browser and try again, or contact %s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return null;
-        }
-        return $selected_method_of_payment;
-    }
-
-
-
-
-
-
-    /********************************************************************************************************/
-    /***********************************  SWITCH PAYMENT METHOD  ************************************/
-    /********************************************************************************************************/
-    /**
-     * switch_payment_method
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function switch_payment_method()
-    {
-        if (! $this->_verify_payment_method_is_set()) {
-            return false;
-        }
-        if (
-            apply_filters(
-                'FHEE__EE_SPCO_Reg_Step_Payment_Options__registration_checkout__selected_payment_method__display_success',
-                false
-            )
-        ) {
-            EE_Error::add_success(
-                apply_filters(
-                    'FHEE__Single_Page_Checkout__registration_checkout__selected_payment_method',
-                    sprintf(
-                        esc_html__(
-                            'You have selected "%s" as your method of payment. Please note the important payment information below.',
-                            'event_espresso'
-                        ),
-                        $this->checkout->payment_method->name()
-                    )
-                )
-            );
-        }
-        // generate billing form for selected method of payment if it hasn't been done already
-        if ($this->checkout->payment_method->type_obj()->has_billing_form()) {
-            $this->checkout->billing_form = $this->_get_billing_form_for_payment_method(
-                $this->checkout->payment_method
-            );
-        }
-        // fill form with attendee info if applicable
-        if (
-            apply_filters(
-                'FHEE__populate_billing_form_fields_from_attendee',
-                (
-                $this->checkout->billing_form instanceof EE_Billing_Attendee_Info_Form
-                && $this->checkout->transaction_has_primary_registrant()
-                ),
-                $this->checkout->billing_form,
-                $this->checkout->transaction
-            )
-        ) {
-            $this->checkout->billing_form->populate_from_attendee(
-                $this->checkout->transaction->primary_registration()->attendee()
-            );
-        }
-        // and debug content
-        if (
-            $this->checkout->billing_form instanceof EE_Billing_Info_Form
-            && $this->checkout->payment_method->type_obj() instanceof EE_PMT_Base
-        ) {
-            $this->checkout->billing_form =
-                $this->checkout->payment_method->type_obj()->apply_billing_form_debug_settings(
-                    $this->checkout->billing_form
-                );
-        }
-        // get html and validation rules for form
-        if ($this->checkout->billing_form instanceof EE_Form_Section_Proper) {
-            $this->checkout->json_response->set_return_data(
-                ['payment_method_info' => $this->checkout->billing_form->get_html()]
-            );
-            // localize validation rules for main form
-            $this->checkout->billing_form->localize_validation_rules(true);
-            $this->checkout->json_response->add_validation_rules(EE_Form_Section_Proper::js_localization());
-        } else {
-            $this->checkout->json_response->set_return_data(['payment_method_info' => '']);
-        }
-        // prevents advancement to next step
-        $this->checkout->continue_reg = false;
-        return true;
-    }
-
-
-    /**
-     * _verify_payment_method_is_set
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _verify_payment_method_is_set()
-    {
-        // generate billing form for selected method of payment if it hasn't been done already
-        if (empty($this->checkout->selected_method_of_payment)) {
-            // how have they chosen to pay?
-            $this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
-        } else {
-            // choose your own adventure based on method_of_payment
-            switch ($this->checkout->selected_method_of_payment) {
-                case 'events_sold_out':
-                    EE_Error::add_attention(
-                        apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___verify_payment_method_is_set__sold_out_events_msg',
-                            esc_html__(
-                                'It appears that the event you were about to make a payment for has sold out since this form first loaded. Please contact the event administrator if you believe this is an error.',
-                                'event_espresso'
-                            )
-                        ),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return false;
-                case 'payments_closed':
-                    EE_Error::add_attention(
-                        apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___verify_payment_method_is_set__payments_closed_msg',
-                            esc_html__(
-                                'It appears that the event you were about to make a payment for is not accepting payments at this time. Please contact the event administrator if you believe this is an error.',
-                                'event_espresso'
-                            )
-                        ),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return false;
-                case 'no_payment_required':
-                    EE_Error::add_attention(
-                        apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___verify_payment_method_is_set__no_payment_required_msg',
-                            esc_html__(
-                                'It appears that the event you were about to make a payment for does not require payment. Please contact the event administrator if you believe this is an error.',
-                                'event_espresso'
-                            )
-                        ),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return false;
-                default:
-            }
-        }
-        // verify payment method
-        if (! $this->checkout->payment_method instanceof EE_Payment_Method) {
-            // get payment method for selected method of payment
-            $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment();
-        }
-        return $this->checkout->payment_method instanceof EE_Payment_Method;
-    }
-
-
-
-    /********************************************************************************************************/
-    /***************************************  SAVE PAYER DETAILS  ****************************************/
-    /********************************************************************************************************/
-    /**
-     * save_payer_details_via_ajax
-     *
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function save_payer_details_via_ajax()
-    {
-        if (! $this->_verify_payment_method_is_set()) {
-            return;
-        }
-        // generate billing form for selected method of payment if it hasn't been done already
-        if ($this->checkout->payment_method->type_obj()->has_billing_form()) {
-            $this->checkout->billing_form = $this->_get_billing_form_for_payment_method(
-                $this->checkout->payment_method
-            );
-        }
-        // generate primary attendee from payer info if applicable
-        if (! $this->checkout->transaction_has_primary_registrant()) {
-            $attendee = $this->_create_attendee_from_request_data();
-            if ($attendee instanceof EE_Attendee) {
-                foreach ($this->checkout->transaction->registrations() as $registration) {
-                    if ($registration->is_primary_registrant()) {
-                        $this->checkout->primary_attendee_obj = $attendee;
-                        $registration->_add_relation_to($attendee, 'Attendee');
-                        $registration->set_attendee_id($attendee->ID());
-                        $registration->update_cache_after_object_save('Attendee', $attendee);
-                    }
-                }
-            }
-        }
-    }
-
-
-    /**
-     * create_attendee_from_request_data
-     * uses info from alternate GET or POST data (such as AJAX) to create a new attendee
-     *
-     * @return EE_Attendee
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _create_attendee_from_request_data()
-    {
-        // get State ID
-        $STA_ID = $this->request->getRequestParam('state');
-        if (! empty($STA_ID)) {
-            // can we get state object from name ?
-            EE_Registry::instance()->load_model('State');
-            $state  = EEM_State::instance()->get_col([['STA_name' => $STA_ID], 'limit' => 1], 'STA_ID');
-            $STA_ID = is_array($state) && ! empty($state) ? reset($state) : $STA_ID;
-        }
-        // get Country ISO
-        $CNT_ISO = $this->request->getRequestParam('country');
-        if (! empty($CNT_ISO)) {
-            // can we get country object from name ?
-            EE_Registry::instance()->load_model('Country');
-            $country = EEM_Country::instance()->get_col(
-                [['CNT_name' => $CNT_ISO], 'limit' => 1],
-                'CNT_ISO'
-            );
-            $CNT_ISO = is_array($country) && ! empty($country) ? reset($country) : $CNT_ISO;
-        }
-        // grab attendee data
-        $attendee_data = [
-            'ATT_fname'    => $this->request->getRequestParam('first_name'),
-            'ATT_lname'    => $this->request->getRequestParam('last_name'),
-            'ATT_email'    => $this->request->getRequestParam('email'),
-            'ATT_address'  => $this->request->getRequestParam('address'),
-            'ATT_address2' => $this->request->getRequestParam('address2'),
-            'ATT_city'     => $this->request->getRequestParam('city'),
-            'STA_ID'       => $STA_ID,
-            'CNT_ISO'      => $CNT_ISO,
-            'ATT_zip'      => $this->request->getRequestParam('zip'),
-            'ATT_phone'    => $this->request->getRequestParam('phone'),
-        ];
-        // validate the email address since it is the most important piece of info
-        if (empty($attendee_data['ATT_email'])) {
-            EE_Error::add_error(
-                esc_html__('An invalid email address was submitted.', 'event_espresso'),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-        // does this attendee already exist in the db ? we're searching using a combination of first name, last name,
-        // AND email address
-        if (
-            ! empty($attendee_data['ATT_fname'])
-            && ! empty($attendee_data['ATT_lname'])
-            && ! empty($attendee_data['ATT_email'])
-        ) {
-            $existing_attendee = EEM_Attendee::instance()->find_existing_attendee(
-                [
-                    'ATT_fname' => $attendee_data['ATT_fname'],
-                    'ATT_lname' => $attendee_data['ATT_lname'],
-                    'ATT_email' => $attendee_data['ATT_email'],
-                ]
-            );
-            if ($existing_attendee instanceof EE_Attendee) {
-                return $existing_attendee;
-            }
-        }
-        // no existing attendee? kk let's create a new one
-        // kinda lame, but we need a first and last name to create an attendee, so use the email address if those
-        // don't exist
-        $attendee_data['ATT_fname'] = ! empty($attendee_data['ATT_fname'])
-            ? $attendee_data['ATT_fname']
-            : $attendee_data['ATT_email'];
-        $attendee_data['ATT_lname'] = ! empty($attendee_data['ATT_lname'])
-            ? $attendee_data['ATT_lname']
-            : $attendee_data['ATT_email'];
-        return EE_Attendee::new_instance($attendee_data);
-    }
-
-
-
-    /********************************************************************************************************/
-    /****************************************  PROCESS REG STEP  *****************************************/
-    /********************************************************************************************************/
-    /**
-     * process_reg_step
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws EntityNotFoundException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidStatusException
-     */
-    public function process_reg_step()
-    {
-        // how have they chosen to pay?
-        $this->checkout->selected_method_of_payment = $this->checkout->transaction->is_free()
-            ? 'no_payment_required'
-            : $this->_get_selected_method_of_payment(true);
-        // choose your own adventure based on method_of_payment
-        switch ($this->checkout->selected_method_of_payment) {
-            case 'events_sold_out':
-                $this->checkout->redirect     = true;
-                $this->checkout->redirect_url = $this->checkout->cancel_page_url;
-                $this->checkout->json_response->set_redirect_url($this->checkout->redirect_url);
-                // mark this reg step as completed
-                $this->set_completed();
-                return false;
-
-            case 'payments_closed':
-                if (
-                    apply_filters(
-                        'FHEE__EE_SPCO_Reg_Step_Payment_Options__process_reg_step__payments_closed__display_success',
-                        false
-                    )
-                ) {
-                    EE_Error::add_success(
-                        esc_html__('no payment required at this time.', 'event_espresso'),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                }
-                // mark this reg step as completed
-                $this->set_completed();
-                return true;
-
-            case 'no_payment_required':
-                if (
-                    apply_filters(
-                        'FHEE__EE_SPCO_Reg_Step_Payment_Options__process_reg_step__no_payment_required__display_success',
-                        false
-                    )
-                ) {
-                    EE_Error::add_success(
-                        esc_html__('no payment required.', 'event_espresso'),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                }
-                // mark this reg step as completed
-                $this->set_completed();
-                return true;
-
-            default:
-                $registrations         = EE_Registry::instance()->SSN->checkout()->transaction->registrations(
-                    EE_Registry::instance()->SSN->checkout()->reg_cache_where_params
-                );
-                $ejected_registrations = EE_SPCO_Reg_Step_Payment_Options::find_registrations_that_lost_their_space(
-                    $registrations,
-                    EE_Registry::instance()->SSN->checkout()->revisit
-                );
-                // calculate difference between the two arrays
-                $registrations = array_diff($registrations, $ejected_registrations);
-                if (empty($registrations)) {
-                    $this->_redirect_because_event_sold_out();
-                    return false;
-                }
-                $payment = $this->_process_payment();
-                if ($payment instanceof EE_Payment) {
-                    $this->checkout->continue_reg = true;
-                    $this->_maybe_set_completed($payment);
-                } else {
-                    $this->checkout->continue_reg = false;
-                }
-                return $payment instanceof EE_Payment;
-        }
-    }
-
-
-    /**
-     * _redirect_because_event_sold_out
-     *
-     * @return void
-     */
-    protected function _redirect_because_event_sold_out()
-    {
-        $this->checkout->continue_reg = false;
-        // set redirect URL
-        $this->checkout->redirect_url = add_query_arg(
-            ['e_reg_url_link' => $this->checkout->reg_url_link],
-            $this->checkout->current_step->reg_step_url()
-        );
-        $this->checkout->json_response->set_redirect_url($this->checkout->redirect_url);
-    }
-
-
-    /**
-     * @param EE_Payment $payment
-     * @return void
-     * @throws EE_Error
-     */
-    protected function _maybe_set_completed(EE_Payment $payment)
-    {
-        // Do we need to redirect them? If so, there's more work to be done.
-        if (! $payment->redirect_url()) {
-            $this->set_completed();
-        }
-    }
-
-
-    /**
-     *    update_reg_step
-     *    this is the final step after a user  revisits the site to retry a payment
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws EntityNotFoundException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidStatusException
-     */
-    public function update_reg_step()
-    {
-        $success = true;
-        // if payment required
-        if ($this->checkout->transaction->total() > 0) {
-            do_action(
-                'AHEE__EE_Single_Page_Checkout__process_finalize_registration__before_gateway',
-                $this->checkout->transaction
-            );
-            // attempt payment via payment method
-            $success = $this->process_reg_step();
-        }
-        if ($success && ! $this->checkout->redirect) {
-            $this->checkout->cart->get_grand_total()->save_this_and_descendants_to_txn(
-                $this->checkout->transaction->ID()
-            );
-            // set return URL
-            $this->checkout->redirect_url = add_query_arg(
-                ['e_reg_url_link' => $this->checkout->reg_url_link],
-                $this->checkout->thank_you_page_url
-            );
-        }
-        return $success;
-    }
-
-
-    /**
-     * @return EE_Payment|null
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _process_payment()
-    {
-        // basically confirm that the event hasn't sold out since they hit the page
-        if (! $this->_last_second_ticket_verifications()) {
-            return null;
-        }
-        // ya gotta make a choice man
-        if (empty($this->checkout->selected_method_of_payment)) {
-            $this->checkout->json_response->set_plz_select_method_of_payment(
-                esc_html__('Please select a method of payment before proceeding.', 'event_espresso')
-            );
-            return null;
-        }
-        // get EE_Payment_Method object
-        if (! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
-            return null;
-        }
-        // setup billing form
-        if ($this->checkout->payment_method->type_obj()->has_billing_form()) {
-            $this->checkout->billing_form = $this->_get_billing_form_for_payment_method(
-                $this->checkout->payment_method
-            );
-            // bad billing form ?
-            if (! $this->_billing_form_is_valid()) {
-                return null;
-            }
-        }
-        // ensure primary registrant has been fully processed
-        if (! $this->_setup_primary_registrant_prior_to_payment()) {
-            return null;
-        }
-        // if session is close to expiring (under 10 minutes by default)
-        if ((time() - EE_Registry::instance()->SSN->expiration()) < EE_Registry::instance()->SSN->extension()) {
-            // add some time to session expiration so that payment can be completed
-            EE_Registry::instance()->SSN->extend_expiration();
-        }
-        /** @type EE_Transaction_Processor $transaction_processor */
-        // $transaction_processor = EE_Registry::instance()->load_class( 'Transaction_Processor' );
-        // in case a registrant leaves to an Off-Site Gateway and never returns, we want to approve any registrations
-        // for events with a default reg status of Approved
-        // $transaction_processor->toggle_registration_statuses_for_default_approved_events(
-        //      $this->checkout->transaction, $this->checkout->reg_cache_where_params
-        // );
-        // attempt payment
-        $payment = $this->_attempt_payment($this->checkout->payment_method);
-        // process results
-        $payment = $this->_validate_payment($payment);
-        $payment = $this->_post_payment_processing($payment);
-        // verify payment
-        if ($payment instanceof EE_Payment) {
-            // store that for later
-            $this->checkout->payment = $payment;
-            // we can also consider the TXN to not have been failed, so temporarily upgrade it's status to abandoned
-            $this->checkout->transaction->toggle_failed_transaction_status();
-            $payment_status = $payment->status();
-            if (
-                $payment_status === EEM_Payment::status_id_approved
-                || $payment_status === EEM_Payment::status_id_pending
-            ) {
-                return $payment;
-            }
-            return null;
-        }
-        if ($payment === true) {
-            // please note that offline payment methods will NOT make a payment,
-            // but instead just mark themselves as the PMD_ID on the transaction, and return true
-            $this->checkout->payment = $payment;
-            return $payment;
-        }
-        // where's my money?
-        return null;
-    }
-
-
-    /**
-     * _last_second_ticket_verifications
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _last_second_ticket_verifications()
-    {
-        // don't bother re-validating if not a return visit
-        if (! $this->checkout->revisit) {
-            return true;
-        }
-        $registrations = $this->checkout->transaction->registrations();
-        if (empty($registrations)) {
-            return false;
-        }
-        foreach ($registrations as $registration) {
-            if ($registration instanceof EE_Registration && ! $registration->is_approved()) {
-                $event = $registration->event_obj();
-                if ($event instanceof EE_Event && $event->is_sold_out(true)) {
-                    EE_Error::add_error(
-                        apply_filters(
-                            'FHEE__EE_SPCO_Reg_Step_Payment_Options___last_second_ticket_verifications__sold_out_events_msg',
-                            sprintf(
-                                esc_html__(
-                                    'It appears that the %1$s event that you were about to make a payment for has sold out since you first registered and/or arrived at this page. Please refresh the page and try again. If you have already made a partial payment towards this event, please contact the event administrator for a refund.',
-                                    'event_espresso'
-                                ),
-                                $event->name()
-                            )
-                        ),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-
-
-    /**
-     * redirect_form
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function redirect_form()
-    {
-        $payment_method_billing_info = $this->_payment_method_billing_info(
-            $this->_get_payment_method_for_selected_method_of_payment()
-        );
-        $html                        = $payment_method_billing_info->get_html();
-        $html                        .= $this->checkout->redirect_form;
-        /** @var ResponseInterface $response */
-        $response = LoaderFactory::getLoader()->getShared(ResponseInterface::class);
-        $response->addOutput($html);
-        return true;
-    }
-
-
-    /**
-     * _billing_form_is_valid
-     *
-     * @return bool
-     * @throws EE_Error
-     */
-    private function _billing_form_is_valid()
-    {
-        if (! $this->checkout->payment_method->type_obj()->has_billing_form()) {
-            return true;
-        }
-        if ($this->checkout->billing_form instanceof EE_Billing_Info_Form) {
-            if ($this->checkout->billing_form->was_submitted()) {
-                $this->checkout->billing_form->receive_form_submission();
-                if ($this->checkout->billing_form->is_valid()) {
-                    return true;
-                }
-                $validation_errors = $this->checkout->billing_form->get_validation_errors_accumulated();
-                $error_strings     = [];
-                foreach ($validation_errors as $validation_error) {
-                    if ($validation_error instanceof EE_Validation_Error) {
-                        $form_section = $validation_error->get_form_section();
-                        if ($form_section instanceof EE_Form_Input_Base) {
-                            $label = $form_section->html_label_text();
-                        } elseif ($form_section instanceof EE_Form_Section_Base) {
-                            $label = $form_section->name();
-                        } else {
-                            $label = esc_html__('Validation Error', 'event_espresso');
-                        }
-                        $error_strings[] = sprintf('%1$s: %2$s', $label, $validation_error->getMessage());
-                    }
-                }
-                EE_Error::add_error(
-                    sprintf(
-                        esc_html__(
-                            'One or more billing form inputs are invalid and require correction before proceeding. %1$s %2$s',
-                            'event_espresso'
-                        ),
-                        '<br/>',
-                        implode('<br/>', $error_strings)
-                    ),
-                    __FILE__,
-                    __FUNCTION__,
-                    __LINE__
-                );
-            } else {
-                EE_Error::add_error(
-                    esc_html__(
-                        'The billing form was not submitted or something prevented it\'s submission.',
-                        'event_espresso'
-                    ),
-                    __FILE__,
-                    __FUNCTION__,
-                    __LINE__
-                );
-            }
-        } else {
-            EE_Error::add_error(
-                esc_html__(
-                    'The submitted billing form is invalid possibly due to a technical reason.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-        return false;
-    }
-
-
-    /**
-     * _setup_primary_registrant_prior_to_payment
-     * ensures that the primary registrant has a valid attendee object created with the critical details populated
-     * (first & last name & email) and that both the transaction object and primary registration object have been saved
-     * plz note that any other registrations will NOT be saved at this point (because they may not have any details
-     * yet)
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _setup_primary_registrant_prior_to_payment()
-    {
-        // check if transaction has a primary registrant and that it has a related Attendee object
-        // if not, then we need to at least gather some primary registrant data before attempting payment
-        if (
-            $this->checkout->billing_form instanceof EE_Billing_Attendee_Info_Form
-            && ! $this->checkout->transaction_has_primary_registrant()
-            && ! $this->_capture_primary_registration_data_from_billing_form()
-        ) {
-            return false;
-        }
-        // because saving an object clears it's cache, we need to do the chevy shuffle
-        // grab the primary_registration object
-        $primary_registration = $this->checkout->transaction->primary_registration();
-        // at this point we'll consider a TXN to not have been failed
-        $this->checkout->transaction->toggle_failed_transaction_status();
-        // save the TXN ( which clears cached copy of primary_registration)
-        $this->checkout->transaction->save();
-        // grab TXN ID and save it to the primary_registration
-        $primary_registration->set_transaction_id($this->checkout->transaction->ID());
-        // save what we have so far
-        $primary_registration->save();
-        return true;
-    }
-
-
-    /**
-     * _capture_primary_registration_data_from_billing_form
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _capture_primary_registration_data_from_billing_form()
-    {
-        // convert billing form data into an attendee
-        $this->checkout->primary_attendee_obj = $this->checkout->billing_form->create_attendee_from_billing_form_data();
-        if (! $this->checkout->primary_attendee_obj instanceof EE_Attendee) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'The billing form details could not be used for attendee details due to a technical issue.%sPlease try again or contact %s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return false;
-        }
-        $primary_registration = $this->checkout->transaction->primary_registration();
-        if (! $primary_registration instanceof EE_Registration) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'The primary registrant for this transaction could not be determined due to a technical issue.%sPlease try again or contact %s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return false;
-        }
-        if (
-            ! $primary_registration->_add_relation_to($this->checkout->primary_attendee_obj, 'Attendee')
-              instanceof
-              EE_Attendee
-        ) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'The primary registrant could not be associated with this transaction due to a technical issue.%sPlease try again or contact %s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return false;
-        }
-        /** @type EE_Registration_Processor $registration_processor */
-        $registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
-        // at this point, we should have enough details about the registrant to consider the registration NOT incomplete
-        $registration_processor->toggle_incomplete_registration_status_to_default($primary_registration);
-        return true;
-    }
-
-
-    /**
-     * _get_payment_method_for_selected_method_of_payment
-     * retrieves a valid payment method
-     *
-     * @return EE_Payment_Method
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _get_payment_method_for_selected_method_of_payment()
-    {
-        if ($this->checkout->selected_method_of_payment === 'events_sold_out') {
-            $this->_redirect_because_event_sold_out();
-            return null;
-        }
-        // get EE_Payment_Method object
-        if (isset($this->checkout->available_payment_methods[ $this->checkout->selected_method_of_payment ])) {
-            $payment_method = $this->checkout->available_payment_methods[ $this->checkout->selected_method_of_payment ];
-        } else {
-            // load EEM_Payment_Method
-            EE_Registry::instance()->load_model('Payment_Method');
-            $EEM_Payment_Method = EEM_Payment_Method::instance();
-            $payment_method     = $EEM_Payment_Method->get_one_by_slug($this->checkout->selected_method_of_payment);
-        }
-        // verify $payment_method
-        if (! $payment_method instanceof EE_Payment_Method) {
-            // not a payment
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'The selected method of payment could not be determined due to a technical issue.%sPlease try again or contact %s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return null;
-        }
-        // and verify it has a valid Payment_Method Type object
-        if (! $payment_method->type_obj() instanceof EE_PMT_Base) {
-            // not a payment
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'A valid payment method could not be determined due to a technical issue.%sPlease try again or contact %s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return null;
-        }
-        return $payment_method;
-    }
-
-
-    /**
-     *    _attempt_payment
-     *
-     * @access    private
-     * @type    EE_Payment_Method $payment_method
-     * @return mixed EE_Payment | boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _attempt_payment(EE_Payment_Method $payment_method)
-    {
-        $payment = null;
-        $this->checkout->transaction->save();
-        $payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
-        if (! $payment_processor instanceof EE_Payment_Processor) {
-            return false;
-        }
-        try {
-            $payment_processor->set_revisit($this->checkout->revisit);
-            // generate payment object
-            $payment = $payment_processor->process_payment(
-                $payment_method,
-                $this->checkout->transaction,
-                $this->checkout->amount_owing,
-                $this->checkout->billing_form,
-                $this->_get_return_url($payment_method),
-                'CART',
-                $this->checkout->admin_request,
-                true,
-                $this->reg_step_url()
-            );
-        } catch (Exception $e) {
-            $this->_handle_payment_processor_exception($e);
-        }
-        return $payment;
-    }
-
-
-    /**
-     * _handle_payment_processor_exception
-     *
-     * @param Exception $e
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _handle_payment_processor_exception(Exception $e)
-    {
-        EE_Error::add_error(
-            sprintf(
-                esc_html__(
-                    'The payment could not br processed due to a technical issue.%1$sPlease try again or contact %2$s for assistance.||The following Exception was thrown in %4$s on line %5$s:%1$s%3$s',
-                    'event_espresso'
-                ),
-                '<br/>',
-                EE_Registry::instance()->CFG->organization->get_pretty('email'),
-                $e->getMessage(),
-                $e->getFile(),
-                $e->getLine()
-            ),
-            __FILE__,
-            __FUNCTION__,
-            __LINE__
-        );
-    }
-
-
-    /**
-     * _get_return_url
-     *
-     * @param EE_Payment_Method $payment_method
-     * @return string
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _get_return_url(EE_Payment_Method $payment_method)
-    {
-        $return_url = '';
-        switch ($payment_method->type_obj()->payment_occurs()) {
-            case EE_PMT_Base::offsite:
-                $return_url = add_query_arg(
-                    [
-                        'action'                     => 'process_gateway_response',
-                        'selected_method_of_payment' => $this->checkout->selected_method_of_payment,
-                        'spco_txn'                   => $this->checkout->transaction->ID(),
-                    ],
-                    $this->reg_step_url()
-                );
-                break;
-            case EE_PMT_Base::onsite:
-            case EE_PMT_Base::offline:
-                $return_url = $this->checkout->next_step->reg_step_url();
-                break;
-        }
-        return $return_url;
-    }
-
-
-    /**
-     * _validate_payment
-     *
-     * @param EE_Payment $payment
-     * @return EE_Payment|FALSE
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _validate_payment($payment = null)
-    {
-        if ($this->checkout->payment_method->is_off_line()) {
-            return true;
-        }
-        // verify payment object
-        if (! $payment instanceof EE_Payment) {
-            // not a payment
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'A valid payment was not generated due to a technical issue.%1$sPlease try again or contact %2$s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return false;
-        }
-        return $payment;
-    }
-
-
-    /**
-     * _post_payment_processing
-     *
-     * @param EE_Payment|bool $payment
-     * @return bool|EE_Payment
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _post_payment_processing($payment = null)
-    {
-        // Off-Line payment?
-        if ($payment === true) {
-            return true;
-        }
-        if ($payment instanceof EE_Payment) {
-            // Should the user be redirected?
-            if ($payment->redirect_url()) {
-                do_action('AHEE_log', __CLASS__, __FUNCTION__, $payment->redirect_url(), '$payment->redirect_url()');
-                $this->checkout->redirect      = true;
-                $this->checkout->redirect_form = $payment->redirect_form();
-                $this->checkout->redirect_url  = $this->reg_step_url('redirect_form');
-                // set JSON response
-                $this->checkout->json_response->set_redirect_form($this->checkout->redirect_form);
-                // and lastly, let's bump the payment status to pending
-                $payment->set_status(EEM_Payment::status_id_pending);
-                $payment->save();
-            } elseif (! $this->_process_payment_status($payment, EE_PMT_Base::onsite)) {
-                // User shouldn't be redirected. So let's process it here.
-                // $this->_setup_redirect_for_next_step();
-                $this->checkout->continue_reg = false;
-            }
-            return $payment;
-        }
-        // ummm ya... not Off-Line, not On-Site, not off-Site ????
-        $this->checkout->continue_reg = false;
-        return false;
-    }
-
-
-    /**
-     *    _process_payment_status
-     *
-     * @type    EE_Payment $payment
-     * @param string       $payment_occurs
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _process_payment_status($payment, $payment_occurs = EE_PMT_Base::offline)
-    {
-        // off-line payment? carry on
-        if ($payment_occurs === EE_PMT_Base::offline) {
-            return true;
-        }
-        // verify payment validity
-        if ($payment instanceof EE_Payment) {
-            do_action('AHEE_log', __CLASS__, __FUNCTION__, $payment->status(), '$payment->status()');
-            $msg = $payment->gateway_response();
-            // check results
-            switch ($payment->status()) {
-                // good payment
-                case EEM_Payment::status_id_approved:
-                    EE_Error::add_success(
-                        esc_html__('Your payment was processed successfully.', 'event_espresso'),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return true;
-                // slow payment
-                case EEM_Payment::status_id_pending:
-                    if (empty($msg)) {
-                        $msg = esc_html__(
-                            'Your payment appears to have been processed successfully, but the Instant Payment Notification has not yet been received. It should arrive shortly.',
-                            'event_espresso'
-                        );
-                    }
-                    EE_Error::add_success($msg, __FILE__, __FUNCTION__, __LINE__);
-                    return true;
-                // don't wanna payment
-                case EEM_Payment::status_id_cancelled:
-                    if (empty($msg)) {
-                        $msg = _n(
-                            'Payment cancelled. Please try again.',
-                            'Payment cancelled. Please try again or select another method of payment.',
-                            count($this->checkout->available_payment_methods),
-                            'event_espresso'
-                        );
-                    }
-                    EE_Error::add_attention($msg, __FILE__, __FUNCTION__, __LINE__);
-                    return false;
-                // not enough payment
-                case EEM_Payment::status_id_declined:
-                    if (empty($msg)) {
-                        $msg = _n(
-                            'We\'re sorry but your payment was declined. Please try again.',
-                            'We\'re sorry but your payment was declined. Please try again or select another method of payment.',
-                            count($this->checkout->available_payment_methods),
-                            'event_espresso'
-                        );
-                    }
-                    EE_Error::add_attention($msg, __FILE__, __FUNCTION__, __LINE__);
-                    return false;
-                // bad payment
-                case EEM_Payment::status_id_failed:
-                    if (! empty($msg)) {
-                        EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-                        return false;
-                    }
-                    // default to error below
-                    break;
-            }
-        }
-        // off-site payment gateway responses are too unreliable, so let's just assume that
-        // the payment processing is just running slower than the registrant's request
-        if ($payment_occurs === EE_PMT_Base::offsite) {
-            return true;
-        }
-        EE_Error::add_error(
-            sprintf(
-                esc_html__(
-                    'Your payment could not be processed successfully due to a technical issue.%sPlease try again or contact %s for assistance.',
-                    'event_espresso'
-                ),
-                '<br/>',
-                EE_Registry::instance()->CFG->organization->get_pretty('email')
-            ),
-            __FILE__,
-            __FUNCTION__,
-            __LINE__
-        );
-        return false;
-    }
-
-
-
-
-
-
-    /********************************************************************************************************/
-    /**********************************  PROCESS GATEWAY RESPONSE  **********************************/
-    /********************************************************************************************************/
-    /**
-     * process_gateway_response
-     * this is the return point for Off-Site Payment Methods
-     * It will attempt to "handle the IPN" if it appears that this has not already occurred,
-     * otherwise, it will load up the last payment made for the TXN.
-     * If the payment retrieved looks good, it will then either:
-     *    complete the current step and allow advancement to the next reg step
-     *        or present the payment options again
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function process_gateway_response()
-    {
-        // how have they chosen to pay?
-        $this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
-        // get EE_Payment_Method object
-        if (! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
-            $this->checkout->continue_reg = false;
-            return false;
-        }
-        if (! $this->checkout->payment_method->is_off_site()) {
-            return false;
-        }
-        $this->_validate_offsite_return();
-        // verify TXN
-        if ($this->checkout->transaction instanceof EE_Transaction) {
-            $gateway = $this->checkout->payment_method->type_obj()->get_gateway();
-            if (! $gateway instanceof EE_Offsite_Gateway) {
-                $this->checkout->continue_reg = false;
-                return false;
-            }
-            $payment = $this->_process_off_site_payment($gateway);
-            $payment = $this->_process_cancelled_payments($payment);
-            $payment = $this->_validate_payment($payment);
-            // if payment was not declined by the payment gateway or cancelled by the registrant
-            if ($this->_process_payment_status($payment, EE_PMT_Base::offsite)) {
-                // $this->_setup_redirect_for_next_step();
-                // store that for later
-                $this->checkout->payment = $payment;
-                // mark this reg step as completed, as long as gateway doesn't use a separate IPN request,
-                // because we will complete this step during the IPN processing then
-                if (! $this->handle_IPN_in_this_request()) {
-                    $this->set_completed();
-                }
-                return true;
-            }
-        }
-        // DEBUG LOG
-        // $this->checkout->log(
-        //     __CLASS__,
-        //     __FUNCTION__,
-        //     __LINE__,
-        //     array('payment' => $payment)
-        // );
-        $this->checkout->continue_reg = false;
-        return false;
-    }
-
-
-    /**
-     * _validate_return
-     *
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _validate_offsite_return()
-    {
-        $TXN_ID = $this->request->getRequestParam('spco_txn', 0, 'int');
-        if ($TXN_ID !== $this->checkout->transaction->ID()) {
-            // Houston... we might have a problem
-            $invalid_TXN = false;
-            // first gather some info
-            $valid_TXN          = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
-            $primary_registrant = $valid_TXN instanceof EE_Transaction
-                ? $valid_TXN->primary_registration()
-                : null;
-            // let's start by retrieving the cart for this TXN
-            $cart = $this->checkout->get_cart_for_transaction($this->checkout->transaction);
-            if ($cart instanceof EE_Cart) {
-                // verify that the current cart has tickets
-                $tickets = $cart->get_tickets();
-                if (empty($tickets)) {
-                    $invalid_TXN = true;
-                }
-            } else {
-                $invalid_TXN = true;
-            }
-            $valid_TXN_SID = $primary_registrant instanceof EE_Registration
-                ? $primary_registrant->session_ID()
-                : null;
-            // validate current Session ID and compare against valid TXN session ID
-            if (
-                $invalid_TXN // if this is already true, then skip other checks
-                || EE_Session::instance()->id() === null
-                || (
-                    // WARNING !!!
-                    // this could be PayPal sending back duplicate requests (ya they do that)
-                    // or it **could** mean someone is simply registering AGAIN after having just done so
-                    // so now we need to determine if this current TXN looks valid or not
-                    // and whether this reg step has even been started ?
-                    EE_Session::instance()->id() === $valid_TXN_SID
-                    // really? you're half way through this reg step, but you never started it ?
-                    && $this->checkout->transaction->reg_step_completed($this->slug()) === false
-                )
-            ) {
-                $invalid_TXN = true;
-            }
-            if ($invalid_TXN) {
-                // is the valid TXN completed ?
-                if ($valid_TXN instanceof EE_Transaction) {
-                    // has this step even been started ?
-                    $reg_step_completed = $valid_TXN->reg_step_completed($this->slug());
-                    if ($reg_step_completed !== false && $reg_step_completed !== true) {
-                        // so it **looks** like this is a double request from PayPal
-                        // so let's try to pick up where we left off
-                        $this->checkout->transaction = $valid_TXN;
-                        $this->checkout->refresh_all_entities(true);
-                        return;
-                    }
-                }
-                // you appear to be lost?
-                $this->_redirect_wayward_request($primary_registrant);
-            }
-        }
-    }
-
-
-    /**
-     * _redirect_wayward_request
-     *
-     * @param EE_Registration|null $primary_registrant
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _redirect_wayward_request(EE_Registration $primary_registrant)
-    {
-        if (! $primary_registrant instanceof EE_Registration) {
-            // try redirecting based on the current TXN
-            $primary_registrant = $this->checkout->transaction instanceof EE_Transaction
-                ? $this->checkout->transaction->primary_registration()
-                : null;
-        }
-        if (! $primary_registrant instanceof EE_Registration) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'Invalid information was received from the Off-Site Payment Processor and your Transaction details could not be retrieved from the database.%1$sPlease try again or contact %2$s for assistance.',
-                        'event_espresso'
-                    ),
-                    '<br/>',
-                    EE_Registry::instance()->CFG->organization->get_pretty('email')
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return;
-        }
-        // make sure transaction is not locked
-        $this->checkout->transaction->unlock();
-        wp_safe_redirect(
-            add_query_arg(
-                [
-                    'e_reg_url_link' => $primary_registrant->reg_url_link(),
-                ],
-                $this->checkout->thank_you_page_url
-            )
-        );
-        exit();
-    }
-
-
-    /**
-     * _process_off_site_payment
-     *
-     * @param EE_Offsite_Gateway $gateway
-     * @return EE_Payment
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _process_off_site_payment(EE_Offsite_Gateway $gateway)
-    {
-        try {
-            $request      = LoaderFactory::getLoader()->getShared(RequestInterface::class);
-            $request_data = $request->requestParams();
-            // if gateway uses_separate_IPN_request, then we don't have to process the IPN manually
-            $this->set_handle_IPN_in_this_request(
-                $gateway->handle_IPN_in_this_request($request_data, false)
-            );
-            if ($this->handle_IPN_in_this_request()) {
-                // get payment details and process results
-                /** @type EE_Payment_Processor $payment_processor */
-                $payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
-                $payment           = $payment_processor->process_ipn(
-                    $request_data,
-                    $this->checkout->transaction,
-                    $this->checkout->payment_method,
-                    true,
-                    false
-                );
-                // $payment_source = 'process_ipn';
-            } else {
-                $payment = $this->checkout->transaction->last_payment();
-                // $payment_source = 'last_payment';
-            }
-        } catch (Exception $e) {
-            // let's just eat the exception and try to move on using any previously set payment info
-            $payment = $this->checkout->transaction->last_payment();
-            // $payment_source = 'last_payment after Exception';
-            // but if we STILL don't have a payment object
-            if (! $payment instanceof EE_Payment) {
-                // then we'll object ! ( not object like a thing... but object like what a lawyer says ! )
-                $this->_handle_payment_processor_exception($e);
-            }
-        }
-        return $payment;
-    }
-
-
-    /**
-     * _process_cancelled_payments
-     * just makes sure that the payment status gets updated correctly
-     * so tha tan error isn't generated during payment validation
-     *
-     * @param EE_Payment $payment
-     * @return EE_Payment|null
-     * @throws EE_Error
-     */
-    private function _process_cancelled_payments($payment = null)
-    {
-        if (
-            $payment instanceof EE_Payment
-            && $this->request->requestParamIsSet('ee_cancel_payment')
-            && $payment->status() === EEM_Payment::status_id_failed
-        ) {
-            $payment->set_status(EEM_Payment::status_id_cancelled);
-        }
-        return $payment;
-    }
-
-
-    /**
-     *    get_transaction_details_for_gateways
-     *
-     * @access    public
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function get_transaction_details_for_gateways()
-    {
-        $txn_details = [];
-        // ya gotta make a choice man
-        if (empty($this->checkout->selected_method_of_payment)) {
-            $txn_details = [
-                'error' => esc_html__('Please select a method of payment before proceeding.', 'event_espresso'),
-            ];
-        }
-        // get EE_Payment_Method object
-        if (
-            empty($txn_details)
-            && ! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()
-        ) {
-            $txn_details = [
-                'selected_method_of_payment' => $this->checkout->selected_method_of_payment,
-                'error'                      => esc_html__(
-                    'A valid Payment Method could not be determined.',
-                    'event_espresso'
-                ),
-            ];
-        }
-        if (empty($txn_details) && $this->checkout->transaction instanceof EE_Transaction) {
-            $return_url  = $this->_get_return_url($this->checkout->payment_method);
-            $txn_details = [
-                'TXN_ID'         => $this->checkout->transaction->ID(),
-                'TXN_timestamp'  => $this->checkout->transaction->datetime(),
-                'TXN_total'      => $this->checkout->transaction->total(),
-                'TXN_paid'       => $this->checkout->transaction->paid(),
-                'TXN_reg_steps'  => $this->checkout->transaction->reg_steps(),
-                'STS_ID'         => $this->checkout->transaction->status_ID(),
-                'PMD_ID'         => $this->checkout->transaction->payment_method_ID(),
-                'payment_amount' => $this->checkout->amount_owing,
-                'return_url'     => $return_url,
-                'cancel_url'     => add_query_arg(['ee_cancel_payment' => true], $return_url),
-                'notify_url'     => EE_Config::instance()->core->txn_page_url(
-                    [
-                        'e_reg_url_link'    => $this->checkout->transaction->primary_registration()->reg_url_link(),
-                        'ee_payment_method' => $this->checkout->payment_method->slug(),
-                    ]
-                ),
-            ];
-        }
-        echo wp_json_encode($txn_details);
-        exit();
-    }
-
-
-    /**
-     *    __sleep
-     * to conserve db space, let's remove the reg_form and the EE_Checkout object from EE_SPCO_Reg_Step objects upon
-     * serialization EE_Checkout will handle the reimplementation of itself upon waking, but we won't bother with the
-     * reg form, because if needed, it will be regenerated anyways
-     *
-     * @return array
-     */
-    public function __sleep()
-    {
-        // remove the reg form and the checkout
-        return array_diff(array_keys(get_object_vars($this)), ['reg_form', 'checkout', 'line_item_display']);
-    }
+	/**
+	 * @var EE_Line_Item_Display $Line_Item_Display
+	 */
+	protected $line_item_display;
+
+	/**
+	 * @var boolean $handle_IPN_in_this_request
+	 */
+	protected $handle_IPN_in_this_request = false;
+
+
+	/**
+	 *    set_hooks - for hooking into EE Core, other modules, etc
+	 *
+	 * @access    public
+	 * @return    void
+	 */
+	public static function set_hooks()
+	{
+		add_filter(
+			'FHEE__SPCO__EE_Line_Item_Filter_Collection',
+			['EE_SPCO_Reg_Step_Payment_Options', 'add_spco_line_item_filters']
+		);
+		add_action(
+			'wp_ajax_switch_spco_billing_form',
+			['EE_SPCO_Reg_Step_Payment_Options', 'switch_spco_billing_form']
+		);
+		add_action(
+			'wp_ajax_nopriv_switch_spco_billing_form',
+			['EE_SPCO_Reg_Step_Payment_Options', 'switch_spco_billing_form']
+		);
+		add_action('wp_ajax_save_payer_details', ['EE_SPCO_Reg_Step_Payment_Options', 'save_payer_details']);
+		add_action(
+			'wp_ajax_nopriv_save_payer_details',
+			['EE_SPCO_Reg_Step_Payment_Options', 'save_payer_details']
+		);
+		add_action(
+			'wp_ajax_get_transaction_details_for_gateways',
+			['EE_SPCO_Reg_Step_Payment_Options', 'get_transaction_details']
+		);
+		add_action(
+			'wp_ajax_nopriv_get_transaction_details_for_gateways',
+			['EE_SPCO_Reg_Step_Payment_Options', 'get_transaction_details']
+		);
+		add_filter(
+			'FHEE__EED_Recaptcha___bypass_recaptcha__bypass_request_params_array',
+			['EE_SPCO_Reg_Step_Payment_Options', 'bypass_recaptcha_for_load_payment_method'],
+			10,
+			1
+		);
+	}
+
+
+	/**
+	 *    ajax switch_spco_billing_form
+	 *
+	 */
+	public static function switch_spco_billing_form()
+	{
+		EED_Single_Page_Checkout::process_ajax_request('switch_payment_method');
+	}
+
+
+	/**
+	 *    ajax save_payer_details
+	 *
+	 */
+	public static function save_payer_details()
+	{
+		EED_Single_Page_Checkout::process_ajax_request('save_payer_details_via_ajax');
+	}
+
+
+	/**
+	 *    ajax get_transaction_details
+	 *
+	 */
+	public static function get_transaction_details()
+	{
+		EED_Single_Page_Checkout::process_ajax_request('get_transaction_details_for_gateways');
+	}
+
+
+	/**
+	 * bypass_recaptcha_for_load_payment_method
+	 *
+	 * @access public
+	 * @return array
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public static function bypass_recaptcha_for_load_payment_method()
+	{
+		return [
+			'EESID'  => EE_Registry::instance()->SSN->id(),
+			'step'   => 'payment_options',
+			'action' => 'spco_billing_form',
+		];
+	}
+
+
+	/**
+	 *    class constructor
+	 *
+	 * @access    public
+	 * @param EE_Checkout $checkout
+	 */
+	public function __construct(EE_Checkout $checkout)
+	{
+		$this->request   = EED_Single_Page_Checkout::getRequest();
+		$this->_slug     = 'payment_options';
+		$this->_name     = esc_html__('Payment Options', 'event_espresso');
+		$this->_template = SPCO_REG_STEPS_PATH . $this->_slug . '/payment_options_main.template.php';
+		$this->checkout  = $checkout;
+		$this->_reset_success_message();
+		$this->set_instructions(
+			esc_html__(
+				'Please select a method of payment and provide any necessary billing information before proceeding.',
+				'event_espresso'
+			)
+		);
+	}
+
+
+	/**
+	 * @return null
+	 */
+	public function line_item_display()
+	{
+		return $this->line_item_display;
+	}
+
+
+	/**
+	 * @param null $line_item_display
+	 */
+	public function set_line_item_display($line_item_display)
+	{
+		$this->line_item_display = $line_item_display;
+	}
+
+
+	/**
+	 * @return boolean
+	 */
+	public function handle_IPN_in_this_request()
+	{
+		return $this->handle_IPN_in_this_request;
+	}
+
+
+	/**
+	 * @param boolean $handle_IPN_in_this_request
+	 */
+	public function set_handle_IPN_in_this_request($handle_IPN_in_this_request)
+	{
+		$this->handle_IPN_in_this_request = filter_var($handle_IPN_in_this_request, FILTER_VALIDATE_BOOLEAN);
+	}
+
+
+	/**
+	 * translate_js_strings
+	 *
+	 * @return void
+	 */
+	public function translate_js_strings()
+	{
+		EE_Registry::$i18n_js_strings['no_payment_method']      = esc_html__(
+			'Please select a method of payment in order to continue.',
+			'event_espresso'
+		);
+		EE_Registry::$i18n_js_strings['invalid_payment_method'] = esc_html__(
+			'A valid method of payment could not be determined. Please refresh the page and try again.',
+			'event_espresso'
+		);
+		EE_Registry::$i18n_js_strings['forwarding_to_offsite']  = esc_html__(
+			'Forwarding to Secure Payment Provider.',
+			'event_espresso'
+		);
+	}
+
+
+	/**
+	 * enqueue_styles_and_scripts
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function enqueue_styles_and_scripts()
+	{
+		$transaction = $this->checkout->transaction;
+		// if the transaction isn't set or nothing is owed on it, don't enqueue any JS
+		if (! $transaction instanceof EE_Transaction || EEH_Money::compare_floats($transaction->remaining(), 0)) {
+			return;
+		}
+		foreach (
+			EEM_Payment_Method::instance()->get_all_for_transaction(
+				$transaction,
+				EEM_Payment_Method::scope_cart
+			) as $payment_method
+		) {
+			$type_obj = $payment_method->type_obj();
+			if ($type_obj instanceof EE_PMT_Base) {
+				$billing_form = $type_obj->generate_new_billing_form($transaction);
+				if ($billing_form instanceof EE_Form_Section_Proper) {
+					$billing_form->enqueue_js();
+				}
+			}
+		}
+	}
+
+
+	/**
+	 * initialize_reg_step
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function initialize_reg_step()
+	{
+		// TODO: if /when we implement donations, then this will need overriding
+		if (
+			// don't need payment options for:
+			// registrations made via the admin
+			// completed transactions
+			// overpaid transactions
+			// $ 0.00 transactions(no payment required)
+			! $this->checkout->payment_required()
+			// but do NOT remove if current action being called belongs to this reg step
+			&& ! is_callable([$this, $this->checkout->action])
+			&& ! $this->completed()
+		) {
+			// and if so, then we no longer need the Payment Options step
+			if ($this->is_current_step()) {
+				$this->checkout->generate_reg_form = false;
+			}
+			$this->checkout->remove_reg_step($this->_slug);
+			// DEBUG LOG
+			// $this->checkout->log( __CLASS__, __FUNCTION__, __LINE__ );
+			return false;
+		}
+		// load EEM_Payment_Method
+		EE_Registry::instance()->load_model('Payment_Method');
+		// get all active payment methods
+		$this->checkout->available_payment_methods = EEM_Payment_Method::instance()->get_all_for_transaction(
+			$this->checkout->transaction,
+			EEM_Payment_Method::scope_cart
+		);
+		return true;
+	}
+
+
+	/**
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws EntityNotFoundException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidStatusException
+	 */
+	public function generate_reg_form()
+	{
+		// reset in case someone changes their mind
+		$this->_reset_selected_method_of_payment();
+		// set some defaults
+		$this->checkout->selected_method_of_payment = 'payments_closed';
+		$registrations_requiring_payment            = [];
+		$registrations_for_free_events              = [];
+		$registrations_requiring_pre_approval       = [];
+		$sold_out_events                            = [];
+		$insufficient_spaces_available              = [];
+		$no_payment_required                        = true;
+		// loop thru registrations to gather info
+		$registrations         = $this->checkout->transaction->registrations($this->checkout->reg_cache_where_params);
+		$ejected_registrations = EE_SPCO_Reg_Step_Payment_Options::find_registrations_that_lost_their_space(
+			$registrations,
+			$this->checkout->revisit
+		);
+		foreach ($registrations as $REG_ID => $registration) {
+			/** @var $registration EE_Registration */
+			// has this registration lost it's space ?
+			if (isset($ejected_registrations[ $REG_ID ])) {
+				if ($registration->event()->is_sold_out() || $registration->event()->is_sold_out(true)) {
+					$sold_out_events[ $registration->event()->ID() ] = $registration->event();
+				} else {
+					$insufficient_spaces_available[ $registration->event()->ID() ] = $registration->event();
+				}
+				continue;
+			}
+			// event requires admin approval
+			if ($registration->status_ID() === EEM_Registration::status_id_not_approved) {
+				// add event to list of events with pre-approval reg status
+				$registrations_requiring_pre_approval[ $REG_ID ] = $registration;
+				do_action(
+					'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__event_requires_pre_approval',
+					$registration->event(),
+					$this
+				);
+				continue;
+			}
+			if (
+				$this->checkout->revisit
+				&& $registration->status_ID() !== EEM_Registration::status_id_approved
+				&& (
+					$registration->event()->is_sold_out()
+					|| $registration->event()->is_sold_out(true)
+				)
+			) {
+				// add event to list of events that are sold out
+				$sold_out_events[ $registration->event()->ID() ] = $registration->event();
+				do_action(
+					'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__sold_out_event',
+					$registration->event(),
+					$this
+				);
+				continue;
+			}
+			// are they allowed to pay now and is there monies owing?
+			if ($registration->owes_monies_and_can_pay()) {
+				$registrations_requiring_payment[ $REG_ID ] = $registration;
+				do_action(
+					'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__event_requires_payment',
+					$registration->event(),
+					$this
+				);
+			} elseif (
+				! $this->checkout->revisit
+					  && $registration->status_ID() !== EEM_Registration::status_id_not_approved
+					  && $registration->ticket()->is_free()
+			) {
+				$registrations_for_free_events[ $registration->ticket()->ID() ] = $registration;
+			}
+		}
+		$subsections = [];
+		// now decide which template to load
+		if (! empty($sold_out_events)) {
+			$subsections['sold_out_events'] = $this->_sold_out_events($sold_out_events);
+		}
+		if (! empty($insufficient_spaces_available)) {
+			$subsections['insufficient_space'] = $this->_insufficient_spaces_available(
+				$insufficient_spaces_available
+			);
+		}
+		if (! empty($registrations_requiring_pre_approval)) {
+			$subsections['registrations_requiring_pre_approval'] = $this->_registrations_requiring_pre_approval(
+				$registrations_requiring_pre_approval
+			);
+		}
+		if (! empty($registrations_for_free_events)) {
+			$subsections['no_payment_required'] = $this->_no_payment_required($registrations_for_free_events);
+		}
+		if (! empty($registrations_requiring_payment)) {
+			if ($this->checkout->amount_owing > 0) {
+				// autoload Line_Item_Display classes
+				EEH_Autoloader::register_line_item_filter_autoloaders();
+				$line_item_filter_processor = new EE_Line_Item_Filter_Processor(
+					apply_filters(
+						'FHEE__SPCO__EE_Line_Item_Filter_Collection',
+						new EE_Line_Item_Filter_Collection()
+					),
+					$this->checkout->cart->get_grand_total()
+				);
+				/** @var EE_Line_Item $filtered_line_item_tree */
+				$filtered_line_item_tree = $line_item_filter_processor->process();
+				EEH_Autoloader::register_line_item_display_autoloaders();
+				$this->set_line_item_display(new EE_Line_Item_Display('spco'));
+				$subsections['payment_options'] = $this->_display_payment_options(
+					$this->line_item_display->display_line_item(
+						$filtered_line_item_tree,
+						['registrations' => $registrations]
+					)
+				);
+				$this->checkout->amount_owing   = $filtered_line_item_tree->total();
+				$this->_apply_registration_payments_to_amount_owing($registrations);
+			}
+			$no_payment_required = false;
+		} else {
+			$this->_hide_reg_step_submit_button_if_revisit();
+		}
+		$this->_save_selected_method_of_payment();
+
+		$subsections['default_hidden_inputs'] = $this->reg_step_hidden_inputs();
+		$subsections['extra_hidden_inputs']   = $this->_extra_hidden_inputs($no_payment_required);
+
+		return new EE_Form_Section_Proper(
+			[
+				'name'            => $this->reg_form_name(),
+				'html_id'         => $this->reg_form_name(),
+				'subsections'     => $subsections,
+				'layout_strategy' => new EE_No_Layout(),
+			]
+		);
+	}
+
+
+	/**
+	 * add line item filters required for this reg step
+	 * these filters are applied via this line in EE_SPCO_Reg_Step_Payment_Options::set_hooks():
+	 *        add_filter( 'FHEE__SPCO__EE_Line_Item_Filter_Collection', array( 'EE_SPCO_Reg_Step_Payment_Options',
+	 *        'add_spco_line_item_filters' ) ); so any code that wants to use the same set of filters during the
+	 *        payment options reg step, can apply these filters via the following: apply_filters(
+	 *        'FHEE__SPCO__EE_Line_Item_Filter_Collection', new EE_Line_Item_Filter_Collection() ) or to an existing
+	 *        filter collection by passing that instead of instantiating a new collection
+	 *
+	 * @param EE_Line_Item_Filter_Collection $line_item_filter_collection
+	 * @return EE_Line_Item_Filter_Collection
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws EntityNotFoundException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidStatusException
+	 */
+	public static function add_spco_line_item_filters(EE_Line_Item_Filter_Collection $line_item_filter_collection)
+	{
+		if (! EE_Registry::instance()->SSN instanceof EE_Session) {
+			return $line_item_filter_collection;
+		}
+		if (! EE_Registry::instance()->SSN->checkout() instanceof EE_Checkout) {
+			return $line_item_filter_collection;
+		}
+		if (! EE_Registry::instance()->SSN->checkout()->transaction instanceof EE_Transaction) {
+			return $line_item_filter_collection;
+		}
+		$line_item_filter_collection->add(
+			new EE_Billable_Line_Item_Filter(
+				EE_SPCO_Reg_Step_Payment_Options::remove_ejected_registrations(
+					EE_Registry::instance()->SSN->checkout()->transaction->registrations(
+						EE_Registry::instance()->SSN->checkout()->reg_cache_where_params
+					)
+				)
+			)
+		);
+		$line_item_filter_collection->add(new EE_Non_Zero_Line_Item_Filter());
+		return $line_item_filter_collection;
+	}
+
+
+	/**
+	 * remove_ejected_registrations
+	 * if a registrant has lost their potential space at an event due to lack of payment,
+	 * then this method removes them from the list of registrations being paid for during this request
+	 *
+	 * @param EE_Registration[] $registrations
+	 * @return EE_Registration[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws EntityNotFoundException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidStatusException
+	 */
+	public static function remove_ejected_registrations(array $registrations)
+	{
+		$ejected_registrations = EE_SPCO_Reg_Step_Payment_Options::find_registrations_that_lost_their_space(
+			$registrations,
+			EE_Registry::instance()->SSN->checkout()->revisit
+		);
+		foreach ($registrations as $REG_ID => $registration) {
+			// has this registration lost it's space ?
+			if (isset($ejected_registrations[ $REG_ID ])) {
+				unset($registrations[ $REG_ID ]);
+			}
+		}
+		return $registrations;
+	}
+
+
+	/**
+	 * find_registrations_that_lost_their_space
+	 * If a registrant chooses an offline payment method like Invoice,
+	 * then no space is reserved for them at the event until they fully pay fo that site
+	 * (unless the event's default reg status is set to APPROVED)
+	 * if a registrant then later returns to pay, but the number of spaces available has been reduced due to sales,
+	 * then this method will determine which registrations have lost the ability to complete the reg process.
+	 *
+	 * @param EE_Registration[] $registrations
+	 * @param bool              $revisit
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws EntityNotFoundException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidStatusException
+	 */
+	public static function find_registrations_that_lost_their_space(array $registrations, $revisit = false)
+	{
+		// registrations per event
+		$event_reg_count = [];
+		// spaces left per event
+		$event_spaces_remaining = [];
+		// tickets left sorted by ID
+		$tickets_remaining = [];
+		// registrations that have lost their space
+		$ejected_registrations = [];
+		foreach ($registrations as $REG_ID => $registration) {
+			if (
+				$registration->status_ID() === EEM_Registration::status_id_approved
+				|| apply_filters(
+					'FHEE__EE_SPCO_Reg_Step_Payment_Options__find_registrations_that_lost_their_space__allow_reg_payment',
+					false,
+					$registration,
+					$revisit
+				)
+			) {
+				continue;
+			}
+			$EVT_ID = $registration->event_ID();
+			$ticket = $registration->ticket();
+			if (! isset($tickets_remaining[ $ticket->ID() ])) {
+				$tickets_remaining[ $ticket->ID() ] = $ticket->remaining();
+			}
+			if ($tickets_remaining[ $ticket->ID() ] > 0) {
+				if (! isset($event_reg_count[ $EVT_ID ])) {
+					$event_reg_count[ $EVT_ID ] = 0;
+				}
+				$event_reg_count[ $EVT_ID ]++;
+				if (! isset($event_spaces_remaining[ $EVT_ID ])) {
+					$event_spaces_remaining[ $EVT_ID ] = $registration->event()->spaces_remaining_for_sale();
+				}
+			}
+			if (
+				$revisit
+				&& ($tickets_remaining[ $ticket->ID() ] === 0
+					|| $event_reg_count[ $EVT_ID ] > $event_spaces_remaining[ $EVT_ID ]
+				)
+			) {
+				$ejected_registrations[ $REG_ID ] = $registration->event();
+				if ($registration->status_ID() !== EEM_Registration::status_id_wait_list) {
+					/** @type EE_Registration_Processor $registration_processor */
+					$registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
+					// at this point, we should have enough details about the registrant to consider the registration
+					// NOT incomplete
+					$registration_processor->manually_update_registration_status(
+						$registration,
+						EEM_Registration::status_id_wait_list
+					);
+				}
+			}
+		}
+		return $ejected_registrations;
+	}
+
+
+	/**
+	 * _hide_reg_step_submit_button
+	 * removes the html for the reg step submit button
+	 * by replacing it with an empty string via filter callback
+	 *
+	 * @return void
+	 */
+	protected function _adjust_registration_status_if_event_old_sold()
+	{
+	}
+
+
+	/**
+	 * _hide_reg_step_submit_button
+	 * removes the html for the reg step submit button
+	 * by replacing it with an empty string via filter callback
+	 *
+	 * @return void
+	 */
+	protected function _hide_reg_step_submit_button_if_revisit()
+	{
+		if ($this->checkout->revisit) {
+			add_filter('FHEE__EE_SPCO_Reg_Step__reg_step_submit_button__sbmt_btn_html', '__return_empty_string');
+		}
+	}
+
+
+	/**
+	 * sold_out_events
+	 * displays notices regarding events that have sold out since hte registrant first signed up
+	 *
+	 * @param EE_Event[] $sold_out_events_array
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 */
+	private function _sold_out_events($sold_out_events_array = [])
+	{
+		// set some defaults
+		$this->checkout->selected_method_of_payment = 'events_sold_out';
+		$sold_out_events                            = '';
+		foreach ($sold_out_events_array as $sold_out_event) {
+			$sold_out_events .= EEH_HTML::li(
+				EEH_HTML::span(
+					'  ' . $sold_out_event->name(),
+					'',
+					'dashicons dashicons-marker ee-icon-size-16 pink-text'
+				)
+			);
+		}
+		return new EE_Form_Section_Proper(
+			[
+				'layout_strategy' => new EE_Template_Layout(
+					[
+						'layout_template_file' => SPCO_REG_STEPS_PATH
+												  . $this->_slug
+												  . '/sold_out_events.template.php',
+						'template_args'        => apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___sold_out_events__template_args',
+							[
+								'sold_out_events'     => $sold_out_events,
+								'sold_out_events_msg' => apply_filters(
+									'FHEE__EE_SPCO_Reg_Step_Payment_Options___sold_out_events__sold_out_events_msg',
+									sprintf(
+										esc_html__(
+											'It appears that the event you were about to make a payment for has sold out since you first registered. If you have already made a partial payment towards this event, please contact the event administrator for a refund.%3$s%3$s%1$sPlease note that availability can change at any time due to cancellations, so please check back again later if registration for this event(s) is important to you.%2$s',
+											'event_espresso'
+										),
+										'<strong>',
+										'</strong>',
+										'<br />'
+									)
+								),
+							]
+						),
+					]
+				),
+			]
+		);
+	}
+
+
+	/**
+	 * _insufficient_spaces_available
+	 * displays notices regarding events that do not have enough remaining spaces
+	 * to satisfy the current number of registrations looking to pay
+	 *
+	 * @param EE_Event[] $insufficient_spaces_events_array
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	private function _insufficient_spaces_available($insufficient_spaces_events_array = [])
+	{
+		// set some defaults
+		$this->checkout->selected_method_of_payment = 'invoice';
+		$insufficient_space_events                  = '';
+		foreach ($insufficient_spaces_events_array as $event) {
+			if ($event instanceof EE_Event) {
+				$insufficient_space_events .= EEH_HTML::li(
+					EEH_HTML::span(' ' . $event->name(), '', 'dashicons dashicons-marker ee-icon-size-16 pink-text')
+				);
+			}
+		}
+		return new EE_Form_Section_Proper(
+			[
+				'subsections'     => [
+					'default_hidden_inputs' => $this->reg_step_hidden_inputs(),
+					'extra_hidden_inputs'   => $this->_extra_hidden_inputs(),
+				],
+				'layout_strategy' => new EE_Template_Layout(
+					[
+						'layout_template_file' => SPCO_REG_STEPS_PATH
+												  . $this->_slug
+												  . '/sold_out_events.template.php',
+						'template_args'        => apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___insufficient_spaces_available__template_args',
+							[
+								'sold_out_events'     => $insufficient_space_events,
+								'sold_out_events_msg' => apply_filters(
+									'FHEE__EE_SPCO_Reg_Step_Payment_Options___insufficient_spaces_available__insufficient_space_msg',
+									esc_html__(
+										'It appears that the event you were about to make a payment for has sold additional tickets since you first registered, and there are no longer enough spaces left to accommodate your selections. You may continue to pay and secure the available space(s) remaining, or simply cancel if you no longer wish to purchase. If you have already made a partial payment towards this event, please contact the event administrator for a refund.',
+										'event_espresso'
+									)
+								),
+							]
+						),
+					]
+				),
+			]
+		);
+	}
+
+
+	/**
+	 * registrations_requiring_pre_approval
+	 *
+	 * @param array $registrations_requiring_pre_approval
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws EntityNotFoundException
+	 * @throws ReflectionException
+	 */
+	private function _registrations_requiring_pre_approval($registrations_requiring_pre_approval = [])
+	{
+		$events_requiring_pre_approval = [];
+		foreach ($registrations_requiring_pre_approval as $registration) {
+			if ($registration instanceof EE_Registration && $registration->event() instanceof EE_Event) {
+				$events_requiring_pre_approval[ $registration->event()->ID() ] = EEH_HTML::li(
+					EEH_HTML::span(
+						'',
+						'',
+						'dashicons dashicons-marker ee-icon-size-16 orange-text'
+					)
+					. EEH_HTML::span($registration->event()->name(), '', 'orange-text')
+				);
+			}
+		}
+		return new EE_Form_Section_Proper(
+			[
+				'layout_strategy' => new EE_Template_Layout(
+					[
+						'layout_template_file' => SPCO_REG_STEPS_PATH
+												  . $this->_slug
+												  . '/events_requiring_pre_approval.template.php', // layout_template
+						'template_args'        => apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___sold_out_events__template_args',
+							[
+								'events_requiring_pre_approval'     => implode('', $events_requiring_pre_approval),
+								'events_requiring_pre_approval_msg' => apply_filters(
+									'FHEE__EE_SPCO_Reg_Step_Payment_Options___events_requiring_pre_approval__events_requiring_pre_approval_msg',
+									esc_html__(
+										'The following events do not require payment at this time and will not be billed during this transaction. Billing will only occur after the attendee has been approved by the event organizer. You will be notified when your registration has been processed. If this is a free event, then no billing will occur.',
+										'event_espresso'
+									)
+								),
+							]
+						),
+					]
+				),
+			]
+		);
+	}
+
+
+	/**
+	 * _no_payment_required
+	 *
+	 * @param EE_Event[] $registrations_for_free_events
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 */
+	private function _no_payment_required($registrations_for_free_events = [])
+	{
+		// set some defaults
+		$this->checkout->selected_method_of_payment = 'no_payment_required';
+		// generate no_payment_required form
+		return new EE_Form_Section_Proper(
+			[
+				'layout_strategy' => new EE_Template_Layout(
+					[
+						'layout_template_file' => SPCO_REG_STEPS_PATH
+												  . $this->_slug
+												  . '/no_payment_required.template.php', // layout_template
+						'template_args'        => apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___no_payment_required__template_args',
+							[
+								'revisit'                       => $this->checkout->revisit,
+								'registrations'                 => [],
+								'ticket_count'                  => [],
+								'registrations_for_free_events' => $registrations_for_free_events,
+								'no_payment_required_msg'       => EEH_HTML::p(
+									esc_html__('This is a free event, so no billing will occur.', 'event_espresso')
+								),
+							]
+						),
+					]
+				),
+			]
+		);
+	}
+
+
+	/**
+	 * _display_payment_options
+	 *
+	 * @param string $transaction_details
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _display_payment_options($transaction_details = '')
+	{
+		// has method_of_payment been set by no-js user?
+		$this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment();
+		// build payment options form
+		return apply_filters(
+			'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__payment_options_form',
+			new EE_Form_Section_Proper(
+				[
+					'subsections'     => [
+						'before_payment_options' => apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__before_payment_options',
+							new EE_Form_Section_Proper(
+								['layout_strategy' => new EE_Div_Per_Section_Layout()]
+							)
+						),
+						'payment_options'        => $this->_setup_payment_options(),
+						'after_payment_options'  => apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__after_payment_options',
+							new EE_Form_Section_Proper(
+								['layout_strategy' => new EE_Div_Per_Section_Layout()]
+							)
+						),
+					],
+					'layout_strategy' => new EE_Template_Layout(
+						[
+							'layout_template_file' => $this->_template,
+							'template_args'        => apply_filters(
+								'FHEE__EE_SPCO_Reg_Step_Payment_Options___display_payment_options__template_args',
+								[
+									'reg_count'                 => $this->line_item_display->total_items(),
+									'transaction_details'       => $transaction_details,
+									'available_payment_methods' => [],
+								]
+							),
+						]
+					),
+				]
+			)
+		);
+	}
+
+
+	/**
+	 * _extra_hidden_inputs
+	 *
+	 * @param bool $no_payment_required
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	private function _extra_hidden_inputs($no_payment_required = true)
+	{
+		return new EE_Form_Section_Proper(
+			[
+				'html_id'         => 'ee-' . $this->slug() . '-extra-hidden-inputs',
+				'layout_strategy' => new EE_Div_Per_Section_Layout(),
+				'subsections'     => [
+					'spco_no_payment_required' => new EE_Hidden_Input(
+						[
+							'normalization_strategy' => new EE_Boolean_Normalization(),
+							'html_name'              => 'spco_no_payment_required',
+							'html_id'                => 'spco-no-payment-required-payment_options',
+							'default'                => $no_payment_required,
+						]
+					),
+					'spco_transaction_id'      => new EE_Fixed_Hidden_Input(
+						[
+							'normalization_strategy' => new EE_Int_Normalization(),
+							'html_name'              => 'spco_transaction_id',
+							'html_id'                => 'spco-transaction-id',
+							'default'                => $this->checkout->transaction->ID(),
+						]
+					),
+				],
+			]
+		);
+	}
+
+
+	/**
+	 *    _apply_registration_payments_to_amount_owing
+	 *
+	 * @param array $registrations
+	 * @throws EE_Error
+	 */
+	protected function _apply_registration_payments_to_amount_owing(array $registrations)
+	{
+		$payments = [];
+		foreach ($registrations as $registration) {
+			if ($registration instanceof EE_Registration && $registration->owes_monies_and_can_pay()) {
+				$payments += $registration->registration_payments();
+			}
+		}
+		if (! empty($payments)) {
+			foreach ($payments as $payment) {
+				if ($payment instanceof EE_Registration_Payment) {
+					$this->checkout->amount_owing -= $payment->amount();
+				}
+			}
+		}
+	}
+
+
+	/**
+	 *    _reset_selected_method_of_payment
+	 *
+	 * @access    private
+	 * @param bool $force_reset
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _reset_selected_method_of_payment($force_reset = false)
+	{
+		/** @var RequestInterface $request */
+		$request              = LoaderFactory::getLoader()->getShared(RequestInterface::class);
+		$reset_payment_method = $request->getRequestParam('reset_payment_method', $force_reset, 'bool');
+		if ($reset_payment_method) {
+			$this->checkout->selected_method_of_payment = null;
+			$this->checkout->payment_method             = null;
+			$this->checkout->billing_form               = null;
+			$this->_save_selected_method_of_payment();
+		}
+	}
+
+
+	/**
+	 * _save_selected_method_of_payment
+	 * stores the selected_method_of_payment in the session
+	 * so that it's available for all subsequent requests including AJAX
+	 *
+	 * @access        private
+	 * @param string $selected_method_of_payment
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _save_selected_method_of_payment($selected_method_of_payment = '')
+	{
+		$selected_method_of_payment = ! empty($selected_method_of_payment)
+			? $selected_method_of_payment
+			: $this->checkout->selected_method_of_payment;
+		EE_Registry::instance()->SSN->set_session_data(
+			['selected_method_of_payment' => $selected_method_of_payment]
+		);
+	}
+
+
+	/**
+	 * _setup_payment_options
+	 *
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function _setup_payment_options()
+	{
+		// load payment method classes
+		$this->checkout->available_payment_methods = $this->_get_available_payment_methods();
+		if (empty($this->checkout->available_payment_methods)) {
+			EE_Error::add_error(
+				apply_filters(
+					'FHEE__EE_SPCO_Reg_Step_Payment_Options___setup_payment_options__error_message_no_payment_methods',
+					sprintf(
+						esc_html__(
+							'Sorry, you cannot complete your purchase because a payment method is not active.%1$s Please contact %2$s for assistance and provide a description of the problem.',
+							'event_espresso'
+						),
+						'<br>',
+						EE_Registry::instance()->CFG->organization->get_pretty('email')
+					)
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+		// switch up header depending on number of available payment methods
+		$payment_method_header     = count($this->checkout->available_payment_methods) > 1
+			? apply_filters(
+				'FHEE__registration_page_payment_options__method_of_payment_hdr',
+				esc_html__('Please Select Your Method of Payment', 'event_espresso')
+			)
+			: apply_filters(
+				'FHEE__registration_page_payment_options__method_of_payment_hdr',
+				esc_html__('Method of Payment', 'event_espresso')
+			);
+		$available_payment_methods = [
+			// display the "Payment Method" header
+			'payment_method_header' => new EE_Form_Section_HTML(
+				apply_filters(
+					'FHEE__EE_SPCO_Reg_Step_Payment_Options___setup_payment_options__payment_method_header',
+					EEH_HTML::h4($payment_method_header, 'method-of-payment-hdr'),
+					$payment_method_header
+				)
+			),
+		];
+		// the list of actual payment methods ( invoice, paypal, etc ) in a  ( slug => HTML )  format
+		$available_payment_method_options = [];
+		$default_payment_method_option    = [];
+		// additional instructions to be displayed and hidden below payment methods (adding a clearing div to start)
+		$payment_methods_billing_info = [
+			new EE_Form_Section_HTML(
+				EEH_HTML::div('<br />', '', '', 'clear:both;')
+			),
+		];
+		// loop through payment methods
+		foreach ($this->checkout->available_payment_methods as $payment_method) {
+			if ($payment_method instanceof EE_Payment_Method) {
+				$payment_method_button = EEH_HTML::img(
+					$payment_method->button_url(),
+					$payment_method->name(),
+					'spco-payment-method-' . $payment_method->slug() . '-btn-img',
+					'spco-payment-method-btn-img'
+				);
+				// check if any payment methods are set as default
+				// if payment method is already selected OR nothing is selected and this payment method should be
+				// open_by_default
+				if (
+					($this->checkout->selected_method_of_payment === $payment_method->slug())
+					|| (! $this->checkout->selected_method_of_payment && $payment_method->open_by_default())
+				) {
+					$this->checkout->selected_method_of_payment = $payment_method->slug();
+					$this->_save_selected_method_of_payment();
+					$default_payment_method_option[ $payment_method->slug() ] = $payment_method_button;
+				} else {
+					$available_payment_method_options[ $payment_method->slug() ] = $payment_method_button;
+				}
+				$payment_methods_billing_info[ $payment_method->slug() . '-info' ] =
+					$this->_payment_method_billing_info(
+						$payment_method
+					);
+			}
+		}
+		// prepend available_payment_method_options with default_payment_method_option so that it appears first in list
+		// of PMs
+		$available_payment_method_options = $default_payment_method_option + $available_payment_method_options;
+		// now generate the actual form  inputs
+		$available_payment_methods['available_payment_methods'] = $this->_available_payment_method_inputs(
+			$available_payment_method_options
+		);
+		$available_payment_methods                              += $payment_methods_billing_info;
+		// build the available payment methods form
+		return new EE_Form_Section_Proper(
+			[
+				'html_id'         => 'spco-available-methods-of-payment-dv',
+				'subsections'     => $available_payment_methods,
+				'layout_strategy' => new EE_Div_Per_Section_Layout(),
+			]
+		);
+	}
+
+
+	/**
+	 * _get_available_payment_methods
+	 *
+	 * @return EE_Payment_Method[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _get_available_payment_methods()
+	{
+		if (! empty($this->checkout->available_payment_methods)) {
+			return $this->checkout->available_payment_methods;
+		}
+		$available_payment_methods = [];
+		$EEM_Payment_Method        = EEM_Payment_Method::instance();
+		// get all active payment methods
+		$payment_methods = $EEM_Payment_Method->get_all_for_transaction(
+			$this->checkout->transaction,
+			EEM_Payment_Method::scope_cart
+		);
+		foreach ($payment_methods as $payment_method) {
+			if ($payment_method instanceof EE_Payment_Method) {
+				$available_payment_methods[ $payment_method->slug() ] = $payment_method;
+			}
+		}
+		return $available_payment_methods;
+	}
+
+
+	/**
+	 *    _available_payment_method_inputs
+	 *
+	 * @access    private
+	 * @param array $available_payment_method_options
+	 * @return    EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws EE_Error
+	 */
+	private function _available_payment_method_inputs($available_payment_method_options = [])
+	{
+		// generate inputs
+		return new EE_Form_Section_Proper(
+			[
+				'html_id'         => 'ee-available-payment-method-inputs',
+				'layout_strategy' => new EE_Div_Per_Section_Layout(),
+				'subsections'     => [
+					'' => new EE_Radio_Button_Input(
+						$available_payment_method_options,
+						[
+							'html_name'          => 'selected_method_of_payment',
+							'html_class'         => 'spco-payment-method',
+							'default'            => $this->checkout->selected_method_of_payment,
+							'label_size'         => 11,
+							'enforce_label_size' => true,
+						]
+					),
+				],
+			]
+		);
+	}
+
+
+	/**
+	 *    _payment_method_billing_info
+	 *
+	 * @access    private
+	 * @param EE_Payment_Method $payment_method
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _payment_method_billing_info(EE_Payment_Method $payment_method)
+	{
+		$currently_selected = $this->checkout->selected_method_of_payment === $payment_method->slug();
+		// generate the billing form for payment method
+		$billing_form                 = $currently_selected
+			? $this->_get_billing_form_for_payment_method($payment_method)
+			: new EE_Form_Section_HTML();
+		$this->checkout->billing_form = $currently_selected
+			? $billing_form
+			: $this->checkout->billing_form;
+		// it's all in the details
+		$info_html = EEH_HTML::h3(
+			esc_html__('Important information regarding your payment', 'event_espresso'),
+			'',
+			'spco-payment-method-hdr'
+		);
+		// add some info regarding the step, either from what's saved in the admin,
+		// or a default string depending on whether the PM has a billing form or not
+		if ($payment_method->description()) {
+			$payment_method_info = $payment_method->description();
+		} elseif ($billing_form instanceof EE_Billing_Info_Form) {
+			$payment_method_info = sprintf(
+				esc_html__(
+					'Please provide the following billing information, then click the "%1$s" button below in order to proceed.',
+					'event_espresso'
+				),
+				$this->submit_button_text()
+			);
+		} else {
+			$payment_method_info = sprintf(
+				esc_html__('Please click the "%1$s" button below in order to proceed.', 'event_espresso'),
+				$this->submit_button_text()
+			);
+		}
+		$info_html .= EEH_HTML::div(
+			apply_filters(
+				'FHEE__EE_SPCO_Reg_Step_Payment_Options___payment_method_billing_info__payment_method_info',
+				$payment_method_info
+			),
+			'',
+			'spco-payment-method-desc ee-attention'
+		);
+		return new EE_Form_Section_Proper(
+			[
+				'html_id'         => 'spco-payment-method-info-' . $payment_method->slug(),
+				'html_class'      => 'spco-payment-method-info-dv',
+				// only display the selected or default PM
+				'html_style'      => $currently_selected ? '' : 'display:none;',
+				'layout_strategy' => new EE_Div_Per_Section_Layout(),
+				'subsections'     => [
+					'info'         => new EE_Form_Section_HTML($info_html),
+					'billing_form' => $currently_selected ? $billing_form : new EE_Form_Section_HTML(),
+				],
+			]
+		);
+	}
+
+
+	/**
+	 * get_billing_form_html_for_payment_method
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function get_billing_form_html_for_payment_method()
+	{
+		// how have they chosen to pay?
+		$this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
+		$this->checkout->payment_method             = $this->_get_payment_method_for_selected_method_of_payment();
+		if (! $this->checkout->payment_method instanceof EE_Payment_Method) {
+			return false;
+		}
+		if (
+			apply_filters(
+				'FHEE__EE_SPCO_Reg_Step_Payment_Options__registration_checkout__selected_payment_method__display_success',
+				false
+			)
+		) {
+			EE_Error::add_success(
+				apply_filters(
+					'FHEE__Single_Page_Checkout__registration_checkout__selected_payment_method',
+					sprintf(
+						esc_html__(
+							'You have selected "%s" as your method of payment. Please note the important payment information below.',
+							'event_espresso'
+						),
+						$this->checkout->payment_method->name()
+					)
+				)
+			);
+		}
+		// now generate billing form for selected method of payment
+		$payment_method_billing_form = $this->_get_billing_form_for_payment_method($this->checkout->payment_method);
+		// fill form with attendee info if applicable
+		if (
+			$payment_method_billing_form instanceof EE_Billing_Attendee_Info_Form
+			&& $this->checkout->transaction_has_primary_registrant()
+		) {
+			$payment_method_billing_form->populate_from_attendee(
+				$this->checkout->transaction->primary_registration()->attendee()
+			);
+		}
+		// and debug content
+		if (
+			$payment_method_billing_form instanceof EE_Billing_Info_Form
+			&& $this->checkout->payment_method->type_obj() instanceof EE_PMT_Base
+		) {
+			$payment_method_billing_form =
+				$this->checkout->payment_method->type_obj()->apply_billing_form_debug_settings(
+					$payment_method_billing_form
+				);
+		}
+		$billing_info = $payment_method_billing_form instanceof EE_Form_Section_Proper
+			? $payment_method_billing_form->get_html()
+			: '';
+		$this->checkout->json_response->set_return_data(['payment_method_info' => $billing_info]);
+		// localize validation rules for main form
+		$this->checkout->current_step->reg_form->localize_validation_rules();
+		$this->checkout->json_response->add_validation_rules(EE_Form_Section_Proper::js_localization());
+		return true;
+	}
+
+
+	/**
+	 * _get_billing_form_for_payment_method
+	 *
+	 * @param EE_Payment_Method $payment_method
+	 * @return EE_Billing_Info_Form|EE_Form_Section_HTML
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _get_billing_form_for_payment_method(EE_Payment_Method $payment_method)
+	{
+		$billing_form = $payment_method->type_obj()->billing_form(
+			$this->checkout->transaction,
+			['amount_owing' => $this->checkout->amount_owing]
+		);
+		if ($billing_form instanceof EE_Billing_Info_Form) {
+			if (
+				apply_filters(
+					'FHEE__EE_SPCO_Reg_Step_Payment_Options__registration_checkout__selected_payment_method__display_success',
+					false
+				)
+				&& $this->request->requestParamIsSet('payment_method')
+			) {
+				EE_Error::add_success(
+					apply_filters(
+						'FHEE__Single_Page_Checkout__registration_checkout__selected_payment_method',
+						sprintf(
+							esc_html__(
+								'You have selected "%s" as your method of payment. Please note the important payment information below.',
+								'event_espresso'
+							),
+							$payment_method->name()
+						)
+					)
+				);
+			}
+			return apply_filters(
+				'FHEE__EE_SPCO_Reg_Step_Payment_Options___get_billing_form_for_payment_method__billing_form',
+				$billing_form,
+				$payment_method
+			);
+		}
+		// no actual billing form, so return empty HTML form section
+		return new EE_Form_Section_HTML();
+	}
+
+
+	/**
+	 * _get_selected_method_of_payment
+	 *
+	 * @param boolean $required whether to throw an error if the "selected_method_of_payment"
+	 *                          is not found in the incoming request
+	 * @param string  $request_param
+	 * @return NULL|string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _get_selected_method_of_payment(
+		$required = false,
+		$request_param = 'selected_method_of_payment'
+	) {
+		// is selected_method_of_payment set in the request ?
+		$selected_method_of_payment = $this->request->getRequestParam($request_param);
+		if ($selected_method_of_payment) {
+			// sanitize it
+			$selected_method_of_payment = is_array($selected_method_of_payment)
+				? array_shift($selected_method_of_payment)
+				: $selected_method_of_payment;
+			$selected_method_of_payment = sanitize_text_field($selected_method_of_payment);
+			// store it in the session so that it's available for all subsequent requests including AJAX
+			$this->_save_selected_method_of_payment($selected_method_of_payment);
+		} else {
+			// or is is set in the session ?
+			$selected_method_of_payment = EE_Registry::instance()->SSN->get_session_data(
+				'selected_method_of_payment'
+			);
+		}
+		// do ya really really gotta have it?
+		if (empty($selected_method_of_payment) && $required) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'The selected method of payment could not be determined.%sPlease ensure that you have selected one before proceeding.%sIf you continue to experience difficulties, then refresh your browser and try again, or contact %s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return null;
+		}
+		return $selected_method_of_payment;
+	}
+
+
+
+
+
+
+	/********************************************************************************************************/
+	/***********************************  SWITCH PAYMENT METHOD  ************************************/
+	/********************************************************************************************************/
+	/**
+	 * switch_payment_method
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function switch_payment_method()
+	{
+		if (! $this->_verify_payment_method_is_set()) {
+			return false;
+		}
+		if (
+			apply_filters(
+				'FHEE__EE_SPCO_Reg_Step_Payment_Options__registration_checkout__selected_payment_method__display_success',
+				false
+			)
+		) {
+			EE_Error::add_success(
+				apply_filters(
+					'FHEE__Single_Page_Checkout__registration_checkout__selected_payment_method',
+					sprintf(
+						esc_html__(
+							'You have selected "%s" as your method of payment. Please note the important payment information below.',
+							'event_espresso'
+						),
+						$this->checkout->payment_method->name()
+					)
+				)
+			);
+		}
+		// generate billing form for selected method of payment if it hasn't been done already
+		if ($this->checkout->payment_method->type_obj()->has_billing_form()) {
+			$this->checkout->billing_form = $this->_get_billing_form_for_payment_method(
+				$this->checkout->payment_method
+			);
+		}
+		// fill form with attendee info if applicable
+		if (
+			apply_filters(
+				'FHEE__populate_billing_form_fields_from_attendee',
+				(
+				$this->checkout->billing_form instanceof EE_Billing_Attendee_Info_Form
+				&& $this->checkout->transaction_has_primary_registrant()
+				),
+				$this->checkout->billing_form,
+				$this->checkout->transaction
+			)
+		) {
+			$this->checkout->billing_form->populate_from_attendee(
+				$this->checkout->transaction->primary_registration()->attendee()
+			);
+		}
+		// and debug content
+		if (
+			$this->checkout->billing_form instanceof EE_Billing_Info_Form
+			&& $this->checkout->payment_method->type_obj() instanceof EE_PMT_Base
+		) {
+			$this->checkout->billing_form =
+				$this->checkout->payment_method->type_obj()->apply_billing_form_debug_settings(
+					$this->checkout->billing_form
+				);
+		}
+		// get html and validation rules for form
+		if ($this->checkout->billing_form instanceof EE_Form_Section_Proper) {
+			$this->checkout->json_response->set_return_data(
+				['payment_method_info' => $this->checkout->billing_form->get_html()]
+			);
+			// localize validation rules for main form
+			$this->checkout->billing_form->localize_validation_rules(true);
+			$this->checkout->json_response->add_validation_rules(EE_Form_Section_Proper::js_localization());
+		} else {
+			$this->checkout->json_response->set_return_data(['payment_method_info' => '']);
+		}
+		// prevents advancement to next step
+		$this->checkout->continue_reg = false;
+		return true;
+	}
+
+
+	/**
+	 * _verify_payment_method_is_set
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _verify_payment_method_is_set()
+	{
+		// generate billing form for selected method of payment if it hasn't been done already
+		if (empty($this->checkout->selected_method_of_payment)) {
+			// how have they chosen to pay?
+			$this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
+		} else {
+			// choose your own adventure based on method_of_payment
+			switch ($this->checkout->selected_method_of_payment) {
+				case 'events_sold_out':
+					EE_Error::add_attention(
+						apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___verify_payment_method_is_set__sold_out_events_msg',
+							esc_html__(
+								'It appears that the event you were about to make a payment for has sold out since this form first loaded. Please contact the event administrator if you believe this is an error.',
+								'event_espresso'
+							)
+						),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return false;
+				case 'payments_closed':
+					EE_Error::add_attention(
+						apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___verify_payment_method_is_set__payments_closed_msg',
+							esc_html__(
+								'It appears that the event you were about to make a payment for is not accepting payments at this time. Please contact the event administrator if you believe this is an error.',
+								'event_espresso'
+							)
+						),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return false;
+				case 'no_payment_required':
+					EE_Error::add_attention(
+						apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___verify_payment_method_is_set__no_payment_required_msg',
+							esc_html__(
+								'It appears that the event you were about to make a payment for does not require payment. Please contact the event administrator if you believe this is an error.',
+								'event_espresso'
+							)
+						),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return false;
+				default:
+			}
+		}
+		// verify payment method
+		if (! $this->checkout->payment_method instanceof EE_Payment_Method) {
+			// get payment method for selected method of payment
+			$this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment();
+		}
+		return $this->checkout->payment_method instanceof EE_Payment_Method;
+	}
+
+
+
+	/********************************************************************************************************/
+	/***************************************  SAVE PAYER DETAILS  ****************************************/
+	/********************************************************************************************************/
+	/**
+	 * save_payer_details_via_ajax
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function save_payer_details_via_ajax()
+	{
+		if (! $this->_verify_payment_method_is_set()) {
+			return;
+		}
+		// generate billing form for selected method of payment if it hasn't been done already
+		if ($this->checkout->payment_method->type_obj()->has_billing_form()) {
+			$this->checkout->billing_form = $this->_get_billing_form_for_payment_method(
+				$this->checkout->payment_method
+			);
+		}
+		// generate primary attendee from payer info if applicable
+		if (! $this->checkout->transaction_has_primary_registrant()) {
+			$attendee = $this->_create_attendee_from_request_data();
+			if ($attendee instanceof EE_Attendee) {
+				foreach ($this->checkout->transaction->registrations() as $registration) {
+					if ($registration->is_primary_registrant()) {
+						$this->checkout->primary_attendee_obj = $attendee;
+						$registration->_add_relation_to($attendee, 'Attendee');
+						$registration->set_attendee_id($attendee->ID());
+						$registration->update_cache_after_object_save('Attendee', $attendee);
+					}
+				}
+			}
+		}
+	}
+
+
+	/**
+	 * create_attendee_from_request_data
+	 * uses info from alternate GET or POST data (such as AJAX) to create a new attendee
+	 *
+	 * @return EE_Attendee
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _create_attendee_from_request_data()
+	{
+		// get State ID
+		$STA_ID = $this->request->getRequestParam('state');
+		if (! empty($STA_ID)) {
+			// can we get state object from name ?
+			EE_Registry::instance()->load_model('State');
+			$state  = EEM_State::instance()->get_col([['STA_name' => $STA_ID], 'limit' => 1], 'STA_ID');
+			$STA_ID = is_array($state) && ! empty($state) ? reset($state) : $STA_ID;
+		}
+		// get Country ISO
+		$CNT_ISO = $this->request->getRequestParam('country');
+		if (! empty($CNT_ISO)) {
+			// can we get country object from name ?
+			EE_Registry::instance()->load_model('Country');
+			$country = EEM_Country::instance()->get_col(
+				[['CNT_name' => $CNT_ISO], 'limit' => 1],
+				'CNT_ISO'
+			);
+			$CNT_ISO = is_array($country) && ! empty($country) ? reset($country) : $CNT_ISO;
+		}
+		// grab attendee data
+		$attendee_data = [
+			'ATT_fname'    => $this->request->getRequestParam('first_name'),
+			'ATT_lname'    => $this->request->getRequestParam('last_name'),
+			'ATT_email'    => $this->request->getRequestParam('email'),
+			'ATT_address'  => $this->request->getRequestParam('address'),
+			'ATT_address2' => $this->request->getRequestParam('address2'),
+			'ATT_city'     => $this->request->getRequestParam('city'),
+			'STA_ID'       => $STA_ID,
+			'CNT_ISO'      => $CNT_ISO,
+			'ATT_zip'      => $this->request->getRequestParam('zip'),
+			'ATT_phone'    => $this->request->getRequestParam('phone'),
+		];
+		// validate the email address since it is the most important piece of info
+		if (empty($attendee_data['ATT_email'])) {
+			EE_Error::add_error(
+				esc_html__('An invalid email address was submitted.', 'event_espresso'),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+		// does this attendee already exist in the db ? we're searching using a combination of first name, last name,
+		// AND email address
+		if (
+			! empty($attendee_data['ATT_fname'])
+			&& ! empty($attendee_data['ATT_lname'])
+			&& ! empty($attendee_data['ATT_email'])
+		) {
+			$existing_attendee = EEM_Attendee::instance()->find_existing_attendee(
+				[
+					'ATT_fname' => $attendee_data['ATT_fname'],
+					'ATT_lname' => $attendee_data['ATT_lname'],
+					'ATT_email' => $attendee_data['ATT_email'],
+				]
+			);
+			if ($existing_attendee instanceof EE_Attendee) {
+				return $existing_attendee;
+			}
+		}
+		// no existing attendee? kk let's create a new one
+		// kinda lame, but we need a first and last name to create an attendee, so use the email address if those
+		// don't exist
+		$attendee_data['ATT_fname'] = ! empty($attendee_data['ATT_fname'])
+			? $attendee_data['ATT_fname']
+			: $attendee_data['ATT_email'];
+		$attendee_data['ATT_lname'] = ! empty($attendee_data['ATT_lname'])
+			? $attendee_data['ATT_lname']
+			: $attendee_data['ATT_email'];
+		return EE_Attendee::new_instance($attendee_data);
+	}
+
+
+
+	/********************************************************************************************************/
+	/****************************************  PROCESS REG STEP  *****************************************/
+	/********************************************************************************************************/
+	/**
+	 * process_reg_step
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws EntityNotFoundException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidStatusException
+	 */
+	public function process_reg_step()
+	{
+		// how have they chosen to pay?
+		$this->checkout->selected_method_of_payment = $this->checkout->transaction->is_free()
+			? 'no_payment_required'
+			: $this->_get_selected_method_of_payment(true);
+		// choose your own adventure based on method_of_payment
+		switch ($this->checkout->selected_method_of_payment) {
+			case 'events_sold_out':
+				$this->checkout->redirect     = true;
+				$this->checkout->redirect_url = $this->checkout->cancel_page_url;
+				$this->checkout->json_response->set_redirect_url($this->checkout->redirect_url);
+				// mark this reg step as completed
+				$this->set_completed();
+				return false;
+
+			case 'payments_closed':
+				if (
+					apply_filters(
+						'FHEE__EE_SPCO_Reg_Step_Payment_Options__process_reg_step__payments_closed__display_success',
+						false
+					)
+				) {
+					EE_Error::add_success(
+						esc_html__('no payment required at this time.', 'event_espresso'),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+				}
+				// mark this reg step as completed
+				$this->set_completed();
+				return true;
+
+			case 'no_payment_required':
+				if (
+					apply_filters(
+						'FHEE__EE_SPCO_Reg_Step_Payment_Options__process_reg_step__no_payment_required__display_success',
+						false
+					)
+				) {
+					EE_Error::add_success(
+						esc_html__('no payment required.', 'event_espresso'),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+				}
+				// mark this reg step as completed
+				$this->set_completed();
+				return true;
+
+			default:
+				$registrations         = EE_Registry::instance()->SSN->checkout()->transaction->registrations(
+					EE_Registry::instance()->SSN->checkout()->reg_cache_where_params
+				);
+				$ejected_registrations = EE_SPCO_Reg_Step_Payment_Options::find_registrations_that_lost_their_space(
+					$registrations,
+					EE_Registry::instance()->SSN->checkout()->revisit
+				);
+				// calculate difference between the two arrays
+				$registrations = array_diff($registrations, $ejected_registrations);
+				if (empty($registrations)) {
+					$this->_redirect_because_event_sold_out();
+					return false;
+				}
+				$payment = $this->_process_payment();
+				if ($payment instanceof EE_Payment) {
+					$this->checkout->continue_reg = true;
+					$this->_maybe_set_completed($payment);
+				} else {
+					$this->checkout->continue_reg = false;
+				}
+				return $payment instanceof EE_Payment;
+		}
+	}
+
+
+	/**
+	 * _redirect_because_event_sold_out
+	 *
+	 * @return void
+	 */
+	protected function _redirect_because_event_sold_out()
+	{
+		$this->checkout->continue_reg = false;
+		// set redirect URL
+		$this->checkout->redirect_url = add_query_arg(
+			['e_reg_url_link' => $this->checkout->reg_url_link],
+			$this->checkout->current_step->reg_step_url()
+		);
+		$this->checkout->json_response->set_redirect_url($this->checkout->redirect_url);
+	}
+
+
+	/**
+	 * @param EE_Payment $payment
+	 * @return void
+	 * @throws EE_Error
+	 */
+	protected function _maybe_set_completed(EE_Payment $payment)
+	{
+		// Do we need to redirect them? If so, there's more work to be done.
+		if (! $payment->redirect_url()) {
+			$this->set_completed();
+		}
+	}
+
+
+	/**
+	 *    update_reg_step
+	 *    this is the final step after a user  revisits the site to retry a payment
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws EntityNotFoundException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidStatusException
+	 */
+	public function update_reg_step()
+	{
+		$success = true;
+		// if payment required
+		if ($this->checkout->transaction->total() > 0) {
+			do_action(
+				'AHEE__EE_Single_Page_Checkout__process_finalize_registration__before_gateway',
+				$this->checkout->transaction
+			);
+			// attempt payment via payment method
+			$success = $this->process_reg_step();
+		}
+		if ($success && ! $this->checkout->redirect) {
+			$this->checkout->cart->get_grand_total()->save_this_and_descendants_to_txn(
+				$this->checkout->transaction->ID()
+			);
+			// set return URL
+			$this->checkout->redirect_url = add_query_arg(
+				['e_reg_url_link' => $this->checkout->reg_url_link],
+				$this->checkout->thank_you_page_url
+			);
+		}
+		return $success;
+	}
+
+
+	/**
+	 * @return EE_Payment|null
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _process_payment()
+	{
+		// basically confirm that the event hasn't sold out since they hit the page
+		if (! $this->_last_second_ticket_verifications()) {
+			return null;
+		}
+		// ya gotta make a choice man
+		if (empty($this->checkout->selected_method_of_payment)) {
+			$this->checkout->json_response->set_plz_select_method_of_payment(
+				esc_html__('Please select a method of payment before proceeding.', 'event_espresso')
+			);
+			return null;
+		}
+		// get EE_Payment_Method object
+		if (! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
+			return null;
+		}
+		// setup billing form
+		if ($this->checkout->payment_method->type_obj()->has_billing_form()) {
+			$this->checkout->billing_form = $this->_get_billing_form_for_payment_method(
+				$this->checkout->payment_method
+			);
+			// bad billing form ?
+			if (! $this->_billing_form_is_valid()) {
+				return null;
+			}
+		}
+		// ensure primary registrant has been fully processed
+		if (! $this->_setup_primary_registrant_prior_to_payment()) {
+			return null;
+		}
+		// if session is close to expiring (under 10 minutes by default)
+		if ((time() - EE_Registry::instance()->SSN->expiration()) < EE_Registry::instance()->SSN->extension()) {
+			// add some time to session expiration so that payment can be completed
+			EE_Registry::instance()->SSN->extend_expiration();
+		}
+		/** @type EE_Transaction_Processor $transaction_processor */
+		// $transaction_processor = EE_Registry::instance()->load_class( 'Transaction_Processor' );
+		// in case a registrant leaves to an Off-Site Gateway and never returns, we want to approve any registrations
+		// for events with a default reg status of Approved
+		// $transaction_processor->toggle_registration_statuses_for_default_approved_events(
+		//      $this->checkout->transaction, $this->checkout->reg_cache_where_params
+		// );
+		// attempt payment
+		$payment = $this->_attempt_payment($this->checkout->payment_method);
+		// process results
+		$payment = $this->_validate_payment($payment);
+		$payment = $this->_post_payment_processing($payment);
+		// verify payment
+		if ($payment instanceof EE_Payment) {
+			// store that for later
+			$this->checkout->payment = $payment;
+			// we can also consider the TXN to not have been failed, so temporarily upgrade it's status to abandoned
+			$this->checkout->transaction->toggle_failed_transaction_status();
+			$payment_status = $payment->status();
+			if (
+				$payment_status === EEM_Payment::status_id_approved
+				|| $payment_status === EEM_Payment::status_id_pending
+			) {
+				return $payment;
+			}
+			return null;
+		}
+		if ($payment === true) {
+			// please note that offline payment methods will NOT make a payment,
+			// but instead just mark themselves as the PMD_ID on the transaction, and return true
+			$this->checkout->payment = $payment;
+			return $payment;
+		}
+		// where's my money?
+		return null;
+	}
+
+
+	/**
+	 * _last_second_ticket_verifications
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _last_second_ticket_verifications()
+	{
+		// don't bother re-validating if not a return visit
+		if (! $this->checkout->revisit) {
+			return true;
+		}
+		$registrations = $this->checkout->transaction->registrations();
+		if (empty($registrations)) {
+			return false;
+		}
+		foreach ($registrations as $registration) {
+			if ($registration instanceof EE_Registration && ! $registration->is_approved()) {
+				$event = $registration->event_obj();
+				if ($event instanceof EE_Event && $event->is_sold_out(true)) {
+					EE_Error::add_error(
+						apply_filters(
+							'FHEE__EE_SPCO_Reg_Step_Payment_Options___last_second_ticket_verifications__sold_out_events_msg',
+							sprintf(
+								esc_html__(
+									'It appears that the %1$s event that you were about to make a payment for has sold out since you first registered and/or arrived at this page. Please refresh the page and try again. If you have already made a partial payment towards this event, please contact the event administrator for a refund.',
+									'event_espresso'
+								),
+								$event->name()
+							)
+						),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return false;
+				}
+			}
+		}
+		return true;
+	}
+
+
+	/**
+	 * redirect_form
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function redirect_form()
+	{
+		$payment_method_billing_info = $this->_payment_method_billing_info(
+			$this->_get_payment_method_for_selected_method_of_payment()
+		);
+		$html                        = $payment_method_billing_info->get_html();
+		$html                        .= $this->checkout->redirect_form;
+		/** @var ResponseInterface $response */
+		$response = LoaderFactory::getLoader()->getShared(ResponseInterface::class);
+		$response->addOutput($html);
+		return true;
+	}
+
+
+	/**
+	 * _billing_form_is_valid
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 */
+	private function _billing_form_is_valid()
+	{
+		if (! $this->checkout->payment_method->type_obj()->has_billing_form()) {
+			return true;
+		}
+		if ($this->checkout->billing_form instanceof EE_Billing_Info_Form) {
+			if ($this->checkout->billing_form->was_submitted()) {
+				$this->checkout->billing_form->receive_form_submission();
+				if ($this->checkout->billing_form->is_valid()) {
+					return true;
+				}
+				$validation_errors = $this->checkout->billing_form->get_validation_errors_accumulated();
+				$error_strings     = [];
+				foreach ($validation_errors as $validation_error) {
+					if ($validation_error instanceof EE_Validation_Error) {
+						$form_section = $validation_error->get_form_section();
+						if ($form_section instanceof EE_Form_Input_Base) {
+							$label = $form_section->html_label_text();
+						} elseif ($form_section instanceof EE_Form_Section_Base) {
+							$label = $form_section->name();
+						} else {
+							$label = esc_html__('Validation Error', 'event_espresso');
+						}
+						$error_strings[] = sprintf('%1$s: %2$s', $label, $validation_error->getMessage());
+					}
+				}
+				EE_Error::add_error(
+					sprintf(
+						esc_html__(
+							'One or more billing form inputs are invalid and require correction before proceeding. %1$s %2$s',
+							'event_espresso'
+						),
+						'<br/>',
+						implode('<br/>', $error_strings)
+					),
+					__FILE__,
+					__FUNCTION__,
+					__LINE__
+				);
+			} else {
+				EE_Error::add_error(
+					esc_html__(
+						'The billing form was not submitted or something prevented it\'s submission.',
+						'event_espresso'
+					),
+					__FILE__,
+					__FUNCTION__,
+					__LINE__
+				);
+			}
+		} else {
+			EE_Error::add_error(
+				esc_html__(
+					'The submitted billing form is invalid possibly due to a technical reason.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+		return false;
+	}
+
+
+	/**
+	 * _setup_primary_registrant_prior_to_payment
+	 * ensures that the primary registrant has a valid attendee object created with the critical details populated
+	 * (first & last name & email) and that both the transaction object and primary registration object have been saved
+	 * plz note that any other registrations will NOT be saved at this point (because they may not have any details
+	 * yet)
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _setup_primary_registrant_prior_to_payment()
+	{
+		// check if transaction has a primary registrant and that it has a related Attendee object
+		// if not, then we need to at least gather some primary registrant data before attempting payment
+		if (
+			$this->checkout->billing_form instanceof EE_Billing_Attendee_Info_Form
+			&& ! $this->checkout->transaction_has_primary_registrant()
+			&& ! $this->_capture_primary_registration_data_from_billing_form()
+		) {
+			return false;
+		}
+		// because saving an object clears it's cache, we need to do the chevy shuffle
+		// grab the primary_registration object
+		$primary_registration = $this->checkout->transaction->primary_registration();
+		// at this point we'll consider a TXN to not have been failed
+		$this->checkout->transaction->toggle_failed_transaction_status();
+		// save the TXN ( which clears cached copy of primary_registration)
+		$this->checkout->transaction->save();
+		// grab TXN ID and save it to the primary_registration
+		$primary_registration->set_transaction_id($this->checkout->transaction->ID());
+		// save what we have so far
+		$primary_registration->save();
+		return true;
+	}
+
+
+	/**
+	 * _capture_primary_registration_data_from_billing_form
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _capture_primary_registration_data_from_billing_form()
+	{
+		// convert billing form data into an attendee
+		$this->checkout->primary_attendee_obj = $this->checkout->billing_form->create_attendee_from_billing_form_data();
+		if (! $this->checkout->primary_attendee_obj instanceof EE_Attendee) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'The billing form details could not be used for attendee details due to a technical issue.%sPlease try again or contact %s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return false;
+		}
+		$primary_registration = $this->checkout->transaction->primary_registration();
+		if (! $primary_registration instanceof EE_Registration) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'The primary registrant for this transaction could not be determined due to a technical issue.%sPlease try again or contact %s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return false;
+		}
+		if (
+			! $primary_registration->_add_relation_to($this->checkout->primary_attendee_obj, 'Attendee')
+			  instanceof
+			  EE_Attendee
+		) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'The primary registrant could not be associated with this transaction due to a technical issue.%sPlease try again or contact %s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return false;
+		}
+		/** @type EE_Registration_Processor $registration_processor */
+		$registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
+		// at this point, we should have enough details about the registrant to consider the registration NOT incomplete
+		$registration_processor->toggle_incomplete_registration_status_to_default($primary_registration);
+		return true;
+	}
+
+
+	/**
+	 * _get_payment_method_for_selected_method_of_payment
+	 * retrieves a valid payment method
+	 *
+	 * @return EE_Payment_Method
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _get_payment_method_for_selected_method_of_payment()
+	{
+		if ($this->checkout->selected_method_of_payment === 'events_sold_out') {
+			$this->_redirect_because_event_sold_out();
+			return null;
+		}
+		// get EE_Payment_Method object
+		if (isset($this->checkout->available_payment_methods[ $this->checkout->selected_method_of_payment ])) {
+			$payment_method = $this->checkout->available_payment_methods[ $this->checkout->selected_method_of_payment ];
+		} else {
+			// load EEM_Payment_Method
+			EE_Registry::instance()->load_model('Payment_Method');
+			$EEM_Payment_Method = EEM_Payment_Method::instance();
+			$payment_method     = $EEM_Payment_Method->get_one_by_slug($this->checkout->selected_method_of_payment);
+		}
+		// verify $payment_method
+		if (! $payment_method instanceof EE_Payment_Method) {
+			// not a payment
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'The selected method of payment could not be determined due to a technical issue.%sPlease try again or contact %s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return null;
+		}
+		// and verify it has a valid Payment_Method Type object
+		if (! $payment_method->type_obj() instanceof EE_PMT_Base) {
+			// not a payment
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'A valid payment method could not be determined due to a technical issue.%sPlease try again or contact %s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return null;
+		}
+		return $payment_method;
+	}
+
+
+	/**
+	 *    _attempt_payment
+	 *
+	 * @access    private
+	 * @type    EE_Payment_Method $payment_method
+	 * @return mixed EE_Payment | boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _attempt_payment(EE_Payment_Method $payment_method)
+	{
+		$payment = null;
+		$this->checkout->transaction->save();
+		$payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
+		if (! $payment_processor instanceof EE_Payment_Processor) {
+			return false;
+		}
+		try {
+			$payment_processor->set_revisit($this->checkout->revisit);
+			// generate payment object
+			$payment = $payment_processor->process_payment(
+				$payment_method,
+				$this->checkout->transaction,
+				$this->checkout->amount_owing,
+				$this->checkout->billing_form,
+				$this->_get_return_url($payment_method),
+				'CART',
+				$this->checkout->admin_request,
+				true,
+				$this->reg_step_url()
+			);
+		} catch (Exception $e) {
+			$this->_handle_payment_processor_exception($e);
+		}
+		return $payment;
+	}
+
+
+	/**
+	 * _handle_payment_processor_exception
+	 *
+	 * @param Exception $e
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _handle_payment_processor_exception(Exception $e)
+	{
+		EE_Error::add_error(
+			sprintf(
+				esc_html__(
+					'The payment could not br processed due to a technical issue.%1$sPlease try again or contact %2$s for assistance.||The following Exception was thrown in %4$s on line %5$s:%1$s%3$s',
+					'event_espresso'
+				),
+				'<br/>',
+				EE_Registry::instance()->CFG->organization->get_pretty('email'),
+				$e->getMessage(),
+				$e->getFile(),
+				$e->getLine()
+			),
+			__FILE__,
+			__FUNCTION__,
+			__LINE__
+		);
+	}
+
+
+	/**
+	 * _get_return_url
+	 *
+	 * @param EE_Payment_Method $payment_method
+	 * @return string
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _get_return_url(EE_Payment_Method $payment_method)
+	{
+		$return_url = '';
+		switch ($payment_method->type_obj()->payment_occurs()) {
+			case EE_PMT_Base::offsite:
+				$return_url = add_query_arg(
+					[
+						'action'                     => 'process_gateway_response',
+						'selected_method_of_payment' => $this->checkout->selected_method_of_payment,
+						'spco_txn'                   => $this->checkout->transaction->ID(),
+					],
+					$this->reg_step_url()
+				);
+				break;
+			case EE_PMT_Base::onsite:
+			case EE_PMT_Base::offline:
+				$return_url = $this->checkout->next_step->reg_step_url();
+				break;
+		}
+		return $return_url;
+	}
+
+
+	/**
+	 * _validate_payment
+	 *
+	 * @param EE_Payment $payment
+	 * @return EE_Payment|FALSE
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _validate_payment($payment = null)
+	{
+		if ($this->checkout->payment_method->is_off_line()) {
+			return true;
+		}
+		// verify payment object
+		if (! $payment instanceof EE_Payment) {
+			// not a payment
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'A valid payment was not generated due to a technical issue.%1$sPlease try again or contact %2$s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return false;
+		}
+		return $payment;
+	}
+
+
+	/**
+	 * _post_payment_processing
+	 *
+	 * @param EE_Payment|bool $payment
+	 * @return bool|EE_Payment
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _post_payment_processing($payment = null)
+	{
+		// Off-Line payment?
+		if ($payment === true) {
+			return true;
+		}
+		if ($payment instanceof EE_Payment) {
+			// Should the user be redirected?
+			if ($payment->redirect_url()) {
+				do_action('AHEE_log', __CLASS__, __FUNCTION__, $payment->redirect_url(), '$payment->redirect_url()');
+				$this->checkout->redirect      = true;
+				$this->checkout->redirect_form = $payment->redirect_form();
+				$this->checkout->redirect_url  = $this->reg_step_url('redirect_form');
+				// set JSON response
+				$this->checkout->json_response->set_redirect_form($this->checkout->redirect_form);
+				// and lastly, let's bump the payment status to pending
+				$payment->set_status(EEM_Payment::status_id_pending);
+				$payment->save();
+			} elseif (! $this->_process_payment_status($payment, EE_PMT_Base::onsite)) {
+				// User shouldn't be redirected. So let's process it here.
+				// $this->_setup_redirect_for_next_step();
+				$this->checkout->continue_reg = false;
+			}
+			return $payment;
+		}
+		// ummm ya... not Off-Line, not On-Site, not off-Site ????
+		$this->checkout->continue_reg = false;
+		return false;
+	}
+
+
+	/**
+	 *    _process_payment_status
+	 *
+	 * @type    EE_Payment $payment
+	 * @param string       $payment_occurs
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _process_payment_status($payment, $payment_occurs = EE_PMT_Base::offline)
+	{
+		// off-line payment? carry on
+		if ($payment_occurs === EE_PMT_Base::offline) {
+			return true;
+		}
+		// verify payment validity
+		if ($payment instanceof EE_Payment) {
+			do_action('AHEE_log', __CLASS__, __FUNCTION__, $payment->status(), '$payment->status()');
+			$msg = $payment->gateway_response();
+			// check results
+			switch ($payment->status()) {
+				// good payment
+				case EEM_Payment::status_id_approved:
+					EE_Error::add_success(
+						esc_html__('Your payment was processed successfully.', 'event_espresso'),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return true;
+				// slow payment
+				case EEM_Payment::status_id_pending:
+					if (empty($msg)) {
+						$msg = esc_html__(
+							'Your payment appears to have been processed successfully, but the Instant Payment Notification has not yet been received. It should arrive shortly.',
+							'event_espresso'
+						);
+					}
+					EE_Error::add_success($msg, __FILE__, __FUNCTION__, __LINE__);
+					return true;
+				// don't wanna payment
+				case EEM_Payment::status_id_cancelled:
+					if (empty($msg)) {
+						$msg = _n(
+							'Payment cancelled. Please try again.',
+							'Payment cancelled. Please try again or select another method of payment.',
+							count($this->checkout->available_payment_methods),
+							'event_espresso'
+						);
+					}
+					EE_Error::add_attention($msg, __FILE__, __FUNCTION__, __LINE__);
+					return false;
+				// not enough payment
+				case EEM_Payment::status_id_declined:
+					if (empty($msg)) {
+						$msg = _n(
+							'We\'re sorry but your payment was declined. Please try again.',
+							'We\'re sorry but your payment was declined. Please try again or select another method of payment.',
+							count($this->checkout->available_payment_methods),
+							'event_espresso'
+						);
+					}
+					EE_Error::add_attention($msg, __FILE__, __FUNCTION__, __LINE__);
+					return false;
+				// bad payment
+				case EEM_Payment::status_id_failed:
+					if (! empty($msg)) {
+						EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+						return false;
+					}
+					// default to error below
+					break;
+			}
+		}
+		// off-site payment gateway responses are too unreliable, so let's just assume that
+		// the payment processing is just running slower than the registrant's request
+		if ($payment_occurs === EE_PMT_Base::offsite) {
+			return true;
+		}
+		EE_Error::add_error(
+			sprintf(
+				esc_html__(
+					'Your payment could not be processed successfully due to a technical issue.%sPlease try again or contact %s for assistance.',
+					'event_espresso'
+				),
+				'<br/>',
+				EE_Registry::instance()->CFG->organization->get_pretty('email')
+			),
+			__FILE__,
+			__FUNCTION__,
+			__LINE__
+		);
+		return false;
+	}
+
+
+
+
+
+
+	/********************************************************************************************************/
+	/**********************************  PROCESS GATEWAY RESPONSE  **********************************/
+	/********************************************************************************************************/
+	/**
+	 * process_gateway_response
+	 * this is the return point for Off-Site Payment Methods
+	 * It will attempt to "handle the IPN" if it appears that this has not already occurred,
+	 * otherwise, it will load up the last payment made for the TXN.
+	 * If the payment retrieved looks good, it will then either:
+	 *    complete the current step and allow advancement to the next reg step
+	 *        or present the payment options again
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function process_gateway_response()
+	{
+		// how have they chosen to pay?
+		$this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
+		// get EE_Payment_Method object
+		if (! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
+			$this->checkout->continue_reg = false;
+			return false;
+		}
+		if (! $this->checkout->payment_method->is_off_site()) {
+			return false;
+		}
+		$this->_validate_offsite_return();
+		// verify TXN
+		if ($this->checkout->transaction instanceof EE_Transaction) {
+			$gateway = $this->checkout->payment_method->type_obj()->get_gateway();
+			if (! $gateway instanceof EE_Offsite_Gateway) {
+				$this->checkout->continue_reg = false;
+				return false;
+			}
+			$payment = $this->_process_off_site_payment($gateway);
+			$payment = $this->_process_cancelled_payments($payment);
+			$payment = $this->_validate_payment($payment);
+			// if payment was not declined by the payment gateway or cancelled by the registrant
+			if ($this->_process_payment_status($payment, EE_PMT_Base::offsite)) {
+				// $this->_setup_redirect_for_next_step();
+				// store that for later
+				$this->checkout->payment = $payment;
+				// mark this reg step as completed, as long as gateway doesn't use a separate IPN request,
+				// because we will complete this step during the IPN processing then
+				if (! $this->handle_IPN_in_this_request()) {
+					$this->set_completed();
+				}
+				return true;
+			}
+		}
+		// DEBUG LOG
+		// $this->checkout->log(
+		//     __CLASS__,
+		//     __FUNCTION__,
+		//     __LINE__,
+		//     array('payment' => $payment)
+		// );
+		$this->checkout->continue_reg = false;
+		return false;
+	}
+
+
+	/**
+	 * _validate_return
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _validate_offsite_return()
+	{
+		$TXN_ID = $this->request->getRequestParam('spco_txn', 0, 'int');
+		if ($TXN_ID !== $this->checkout->transaction->ID()) {
+			// Houston... we might have a problem
+			$invalid_TXN = false;
+			// first gather some info
+			$valid_TXN          = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
+			$primary_registrant = $valid_TXN instanceof EE_Transaction
+				? $valid_TXN->primary_registration()
+				: null;
+			// let's start by retrieving the cart for this TXN
+			$cart = $this->checkout->get_cart_for_transaction($this->checkout->transaction);
+			if ($cart instanceof EE_Cart) {
+				// verify that the current cart has tickets
+				$tickets = $cart->get_tickets();
+				if (empty($tickets)) {
+					$invalid_TXN = true;
+				}
+			} else {
+				$invalid_TXN = true;
+			}
+			$valid_TXN_SID = $primary_registrant instanceof EE_Registration
+				? $primary_registrant->session_ID()
+				: null;
+			// validate current Session ID and compare against valid TXN session ID
+			if (
+				$invalid_TXN // if this is already true, then skip other checks
+				|| EE_Session::instance()->id() === null
+				|| (
+					// WARNING !!!
+					// this could be PayPal sending back duplicate requests (ya they do that)
+					// or it **could** mean someone is simply registering AGAIN after having just done so
+					// so now we need to determine if this current TXN looks valid or not
+					// and whether this reg step has even been started ?
+					EE_Session::instance()->id() === $valid_TXN_SID
+					// really? you're half way through this reg step, but you never started it ?
+					&& $this->checkout->transaction->reg_step_completed($this->slug()) === false
+				)
+			) {
+				$invalid_TXN = true;
+			}
+			if ($invalid_TXN) {
+				// is the valid TXN completed ?
+				if ($valid_TXN instanceof EE_Transaction) {
+					// has this step even been started ?
+					$reg_step_completed = $valid_TXN->reg_step_completed($this->slug());
+					if ($reg_step_completed !== false && $reg_step_completed !== true) {
+						// so it **looks** like this is a double request from PayPal
+						// so let's try to pick up where we left off
+						$this->checkout->transaction = $valid_TXN;
+						$this->checkout->refresh_all_entities(true);
+						return;
+					}
+				}
+				// you appear to be lost?
+				$this->_redirect_wayward_request($primary_registrant);
+			}
+		}
+	}
+
+
+	/**
+	 * _redirect_wayward_request
+	 *
+	 * @param EE_Registration|null $primary_registrant
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _redirect_wayward_request(EE_Registration $primary_registrant)
+	{
+		if (! $primary_registrant instanceof EE_Registration) {
+			// try redirecting based on the current TXN
+			$primary_registrant = $this->checkout->transaction instanceof EE_Transaction
+				? $this->checkout->transaction->primary_registration()
+				: null;
+		}
+		if (! $primary_registrant instanceof EE_Registration) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'Invalid information was received from the Off-Site Payment Processor and your Transaction details could not be retrieved from the database.%1$sPlease try again or contact %2$s for assistance.',
+						'event_espresso'
+					),
+					'<br/>',
+					EE_Registry::instance()->CFG->organization->get_pretty('email')
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return;
+		}
+		// make sure transaction is not locked
+		$this->checkout->transaction->unlock();
+		wp_safe_redirect(
+			add_query_arg(
+				[
+					'e_reg_url_link' => $primary_registrant->reg_url_link(),
+				],
+				$this->checkout->thank_you_page_url
+			)
+		);
+		exit();
+	}
+
+
+	/**
+	 * _process_off_site_payment
+	 *
+	 * @param EE_Offsite_Gateway $gateway
+	 * @return EE_Payment
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _process_off_site_payment(EE_Offsite_Gateway $gateway)
+	{
+		try {
+			$request      = LoaderFactory::getLoader()->getShared(RequestInterface::class);
+			$request_data = $request->requestParams();
+			// if gateway uses_separate_IPN_request, then we don't have to process the IPN manually
+			$this->set_handle_IPN_in_this_request(
+				$gateway->handle_IPN_in_this_request($request_data, false)
+			);
+			if ($this->handle_IPN_in_this_request()) {
+				// get payment details and process results
+				/** @type EE_Payment_Processor $payment_processor */
+				$payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
+				$payment           = $payment_processor->process_ipn(
+					$request_data,
+					$this->checkout->transaction,
+					$this->checkout->payment_method,
+					true,
+					false
+				);
+				// $payment_source = 'process_ipn';
+			} else {
+				$payment = $this->checkout->transaction->last_payment();
+				// $payment_source = 'last_payment';
+			}
+		} catch (Exception $e) {
+			// let's just eat the exception and try to move on using any previously set payment info
+			$payment = $this->checkout->transaction->last_payment();
+			// $payment_source = 'last_payment after Exception';
+			// but if we STILL don't have a payment object
+			if (! $payment instanceof EE_Payment) {
+				// then we'll object ! ( not object like a thing... but object like what a lawyer says ! )
+				$this->_handle_payment_processor_exception($e);
+			}
+		}
+		return $payment;
+	}
+
+
+	/**
+	 * _process_cancelled_payments
+	 * just makes sure that the payment status gets updated correctly
+	 * so tha tan error isn't generated during payment validation
+	 *
+	 * @param EE_Payment $payment
+	 * @return EE_Payment|null
+	 * @throws EE_Error
+	 */
+	private function _process_cancelled_payments($payment = null)
+	{
+		if (
+			$payment instanceof EE_Payment
+			&& $this->request->requestParamIsSet('ee_cancel_payment')
+			&& $payment->status() === EEM_Payment::status_id_failed
+		) {
+			$payment->set_status(EEM_Payment::status_id_cancelled);
+		}
+		return $payment;
+	}
+
+
+	/**
+	 *    get_transaction_details_for_gateways
+	 *
+	 * @access    public
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function get_transaction_details_for_gateways()
+	{
+		$txn_details = [];
+		// ya gotta make a choice man
+		if (empty($this->checkout->selected_method_of_payment)) {
+			$txn_details = [
+				'error' => esc_html__('Please select a method of payment before proceeding.', 'event_espresso'),
+			];
+		}
+		// get EE_Payment_Method object
+		if (
+			empty($txn_details)
+			&& ! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()
+		) {
+			$txn_details = [
+				'selected_method_of_payment' => $this->checkout->selected_method_of_payment,
+				'error'                      => esc_html__(
+					'A valid Payment Method could not be determined.',
+					'event_espresso'
+				),
+			];
+		}
+		if (empty($txn_details) && $this->checkout->transaction instanceof EE_Transaction) {
+			$return_url  = $this->_get_return_url($this->checkout->payment_method);
+			$txn_details = [
+				'TXN_ID'         => $this->checkout->transaction->ID(),
+				'TXN_timestamp'  => $this->checkout->transaction->datetime(),
+				'TXN_total'      => $this->checkout->transaction->total(),
+				'TXN_paid'       => $this->checkout->transaction->paid(),
+				'TXN_reg_steps'  => $this->checkout->transaction->reg_steps(),
+				'STS_ID'         => $this->checkout->transaction->status_ID(),
+				'PMD_ID'         => $this->checkout->transaction->payment_method_ID(),
+				'payment_amount' => $this->checkout->amount_owing,
+				'return_url'     => $return_url,
+				'cancel_url'     => add_query_arg(['ee_cancel_payment' => true], $return_url),
+				'notify_url'     => EE_Config::instance()->core->txn_page_url(
+					[
+						'e_reg_url_link'    => $this->checkout->transaction->primary_registration()->reg_url_link(),
+						'ee_payment_method' => $this->checkout->payment_method->slug(),
+					]
+				),
+			];
+		}
+		echo wp_json_encode($txn_details);
+		exit();
+	}
+
+
+	/**
+	 *    __sleep
+	 * to conserve db space, let's remove the reg_form and the EE_Checkout object from EE_SPCO_Reg_Step objects upon
+	 * serialization EE_Checkout will handle the reimplementation of itself upon waking, but we won't bother with the
+	 * reg form, because if needed, it will be regenerated anyways
+	 *
+	 * @return array
+	 */
+	public function __sleep()
+	{
+		// remove the reg form and the checkout
+		return array_diff(array_keys(get_object_vars($this)), ['reg_form', 'checkout', 'line_item_display']);
+	}
 }

Spacing +80 added lines, -80 removed lines

@@ -132,7 +132,7 @@ 
         $this->request   = EED_Single_Page_Checkout::getRequest();
         $this->_slug     = 'payment_options';
         $this->_name     = esc_html__('Payment Options', 'event_espresso');
-        $this->_template = SPCO_REG_STEPS_PATH . $this->_slug . '/payment_options_main.template.php';
+        $this->_template = SPCO_REG_STEPS_PATH.$this->_slug.'/payment_options_main.template.php';
         $this->checkout  = $checkout;
         $this->_reset_success_message();
         $this->set_instructions(
@@ -187,7 +187,7 @@ 
      */
     public function translate_js_strings()
     {
-        EE_Registry::$i18n_js_strings['no_payment_method']      = esc_html__(
+        EE_Registry::$i18n_js_strings['no_payment_method'] = esc_html__(
             'Please select a method of payment in order to continue.',
             'event_espresso'
         );
@@ -195,7 +195,7 @@ 
             'A valid method of payment could not be determined. Please refresh the page and try again.',
             'event_espresso'
         );
-        EE_Registry::$i18n_js_strings['forwarding_to_offsite']  = esc_html__(
+        EE_Registry::$i18n_js_strings['forwarding_to_offsite'] = esc_html__(
             'Forwarding to Secure Payment Provider.',
             'event_espresso'
         );
@@ -216,7 +216,7 @@ 
     {
         $transaction = $this->checkout->transaction;
         // if the transaction isn't set or nothing is owed on it, don't enqueue any JS
-        if (! $transaction instanceof EE_Transaction || EEH_Money::compare_floats($transaction->remaining(), 0)) {
+        if ( ! $transaction instanceof EE_Transaction || EEH_Money::compare_floats($transaction->remaining(), 0)) {
             return;
         }
         foreach (
@@ -311,18 +311,18 @@ 
         foreach ($registrations as $REG_ID => $registration) {
             /** @var $registration EE_Registration */
             // has this registration lost it's space ?
-            if (isset($ejected_registrations[ $REG_ID ])) {
+            if (isset($ejected_registrations[$REG_ID])) {
                 if ($registration->event()->is_sold_out() || $registration->event()->is_sold_out(true)) {
-                    $sold_out_events[ $registration->event()->ID() ] = $registration->event();
+                    $sold_out_events[$registration->event()->ID()] = $registration->event();
                 } else {
-                    $insufficient_spaces_available[ $registration->event()->ID() ] = $registration->event();
+                    $insufficient_spaces_available[$registration->event()->ID()] = $registration->event();
                 }
                 continue;
             }
             // event requires admin approval
             if ($registration->status_ID() === EEM_Registration::status_id_not_approved) {
                 // add event to list of events with pre-approval reg status
-                $registrations_requiring_pre_approval[ $REG_ID ] = $registration;
+                $registrations_requiring_pre_approval[$REG_ID] = $registration;
                 do_action(
                     'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__event_requires_pre_approval',
                     $registration->event(),
@@ -339,7 +339,7 @@ 
                 )
             ) {
                 // add event to list of events that are sold out
-                $sold_out_events[ $registration->event()->ID() ] = $registration->event();
+                $sold_out_events[$registration->event()->ID()] = $registration->event();
                 do_action(
                     'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__sold_out_event',
                     $registration->event(),
@@ -349,7 +349,7 @@ 
             }
             // are they allowed to pay now and is there monies owing?
             if ($registration->owes_monies_and_can_pay()) {
-                $registrations_requiring_payment[ $REG_ID ] = $registration;
+                $registrations_requiring_payment[$REG_ID] = $registration;
                 do_action(
                     'AHEE__EE_SPCO_Reg_Step_Payment_Options__generate_reg_form__event_requires_payment',
                     $registration->event(),
@@ -360,28 +360,28 @@ 
                       && $registration->status_ID() !== EEM_Registration::status_id_not_approved
                       && $registration->ticket()->is_free()
             ) {
-                $registrations_for_free_events[ $registration->ticket()->ID() ] = $registration;
+                $registrations_for_free_events[$registration->ticket()->ID()] = $registration;
             }
         }
         $subsections = [];
         // now decide which template to load
-        if (! empty($sold_out_events)) {
+        if ( ! empty($sold_out_events)) {
             $subsections['sold_out_events'] = $this->_sold_out_events($sold_out_events);
         }
-        if (! empty($insufficient_spaces_available)) {
+        if ( ! empty($insufficient_spaces_available)) {
             $subsections['insufficient_space'] = $this->_insufficient_spaces_available(
                 $insufficient_spaces_available
             );
         }
-        if (! empty($registrations_requiring_pre_approval)) {
+        if ( ! empty($registrations_requiring_pre_approval)) {
             $subsections['registrations_requiring_pre_approval'] = $this->_registrations_requiring_pre_approval(
                 $registrations_requiring_pre_approval
             );
         }
-        if (! empty($registrations_for_free_events)) {
+        if ( ! empty($registrations_for_free_events)) {
             $subsections['no_payment_required'] = $this->_no_payment_required($registrations_for_free_events);
         }
-        if (! empty($registrations_requiring_payment)) {
+        if ( ! empty($registrations_requiring_payment)) {
             if ($this->checkout->amount_owing > 0) {
                 // autoload Line_Item_Display classes
                 EEH_Autoloader::register_line_item_filter_autoloaders();
@@ -402,7 +402,7 @@ 
                         ['registrations' => $registrations]
                     )
                 );
-                $this->checkout->amount_owing   = $filtered_line_item_tree->total();
+                $this->checkout->amount_owing = $filtered_line_item_tree->total();
                 $this->_apply_registration_payments_to_amount_owing($registrations);
             }
             $no_payment_required = false;
@@ -446,13 +446,13 @@ 
      */
     public static function add_spco_line_item_filters(EE_Line_Item_Filter_Collection $line_item_filter_collection)
     {
-        if (! EE_Registry::instance()->SSN instanceof EE_Session) {
+        if ( ! EE_Registry::instance()->SSN instanceof EE_Session) {
             return $line_item_filter_collection;
         }
-        if (! EE_Registry::instance()->SSN->checkout() instanceof EE_Checkout) {
+        if ( ! EE_Registry::instance()->SSN->checkout() instanceof EE_Checkout) {
             return $line_item_filter_collection;
         }
-        if (! EE_Registry::instance()->SSN->checkout()->transaction instanceof EE_Transaction) {
+        if ( ! EE_Registry::instance()->SSN->checkout()->transaction instanceof EE_Transaction) {
             return $line_item_filter_collection;
         }
         $line_item_filter_collection->add(
@@ -492,8 +492,8 @@ 
         );
         foreach ($registrations as $REG_ID => $registration) {
             // has this registration lost it's space ?
-            if (isset($ejected_registrations[ $REG_ID ])) {
-                unset($registrations[ $REG_ID ]);
+            if (isset($ejected_registrations[$REG_ID])) {
+                unset($registrations[$REG_ID]);
             }
         }
         return $registrations;
@@ -543,25 +543,25 @@ 
             }
             $EVT_ID = $registration->event_ID();
             $ticket = $registration->ticket();
-            if (! isset($tickets_remaining[ $ticket->ID() ])) {
-                $tickets_remaining[ $ticket->ID() ] = $ticket->remaining();
+            if ( ! isset($tickets_remaining[$ticket->ID()])) {
+                $tickets_remaining[$ticket->ID()] = $ticket->remaining();
             }
-            if ($tickets_remaining[ $ticket->ID() ] > 0) {
-                if (! isset($event_reg_count[ $EVT_ID ])) {
-                    $event_reg_count[ $EVT_ID ] = 0;
+            if ($tickets_remaining[$ticket->ID()] > 0) {
+                if ( ! isset($event_reg_count[$EVT_ID])) {
+                    $event_reg_count[$EVT_ID] = 0;
                 }
-                $event_reg_count[ $EVT_ID ]++;
-                if (! isset($event_spaces_remaining[ $EVT_ID ])) {
-                    $event_spaces_remaining[ $EVT_ID ] = $registration->event()->spaces_remaining_for_sale();
+                $event_reg_count[$EVT_ID]++;
+                if ( ! isset($event_spaces_remaining[$EVT_ID])) {
+                    $event_spaces_remaining[$EVT_ID] = $registration->event()->spaces_remaining_for_sale();
                 }
             }
             if (
                 $revisit
-                && ($tickets_remaining[ $ticket->ID() ] === 0
-                    || $event_reg_count[ $EVT_ID ] > $event_spaces_remaining[ $EVT_ID ]
+                && ($tickets_remaining[$ticket->ID()] === 0
+                    || $event_reg_count[$EVT_ID] > $event_spaces_remaining[$EVT_ID]
                 )
             ) {
-                $ejected_registrations[ $REG_ID ] = $registration->event();
+                $ejected_registrations[$REG_ID] = $registration->event();
                 if ($registration->status_ID() !== EEM_Registration::status_id_wait_list) {
                     /** @type EE_Registration_Processor $registration_processor */
                     $registration_processor = EE_Registry::instance()->load_class('Registration_Processor');
@@ -621,7 +621,7 @@ 
         foreach ($sold_out_events_array as $sold_out_event) {
             $sold_out_events .= EEH_HTML::li(
                 EEH_HTML::span(
-                    '  ' . $sold_out_event->name(),
+                    '  '.$sold_out_event->name(),
                     '',
                     'dashicons dashicons-marker ee-icon-size-16 pink-text'
                 )
@@ -677,7 +677,7 @@ 
         foreach ($insufficient_spaces_events_array as $event) {
             if ($event instanceof EE_Event) {
                 $insufficient_space_events .= EEH_HTML::li(
-                    EEH_HTML::span(' ' . $event->name(), '', 'dashicons dashicons-marker ee-icon-size-16 pink-text')
+                    EEH_HTML::span(' '.$event->name(), '', 'dashicons dashicons-marker ee-icon-size-16 pink-text')
                 );
             }
         }
@@ -726,7 +726,7 @@ 
         $events_requiring_pre_approval = [];
         foreach ($registrations_requiring_pre_approval as $registration) {
             if ($registration instanceof EE_Registration && $registration->event() instanceof EE_Event) {
-                $events_requiring_pre_approval[ $registration->event()->ID() ] = EEH_HTML::li(
+                $events_requiring_pre_approval[$registration->event()->ID()] = EEH_HTML::li(
                     EEH_HTML::span(
                         '',
                         '',
@@ -866,7 +866,7 @@ 
     {
         return new EE_Form_Section_Proper(
             [
-                'html_id'         => 'ee-' . $this->slug() . '-extra-hidden-inputs',
+                'html_id'         => 'ee-'.$this->slug().'-extra-hidden-inputs',
                 'layout_strategy' => new EE_Div_Per_Section_Layout(),
                 'subsections'     => [
                     'spco_no_payment_required' => new EE_Hidden_Input(
@@ -905,7 +905,7 @@ 
                 $payments += $registration->registration_payments();
             }
         }
-        if (! empty($payments)) {
+        if ( ! empty($payments)) {
             foreach ($payments as $payment) {
                 if ($payment instanceof EE_Registration_Payment) {
                     $this->checkout->amount_owing -= $payment->amount();
@@ -994,7 +994,7 @@ 
             );
         }
         // switch up header depending on number of available payment methods
-        $payment_method_header     = count($this->checkout->available_payment_methods) > 1
+        $payment_method_header = count($this->checkout->available_payment_methods) > 1
             ? apply_filters(
                 'FHEE__registration_page_payment_options__method_of_payment_hdr',
                 esc_html__('Please Select Your Method of Payment', 'event_espresso')
@@ -1028,7 +1028,7 @@ 
                 $payment_method_button = EEH_HTML::img(
                     $payment_method->button_url(),
                     $payment_method->name(),
-                    'spco-payment-method-' . $payment_method->slug() . '-btn-img',
+                    'spco-payment-method-'.$payment_method->slug().'-btn-img',
                     'spco-payment-method-btn-img'
                 );
                 // check if any payment methods are set as default
@@ -1036,15 +1036,15 @@ 
                 // open_by_default
                 if (
                     ($this->checkout->selected_method_of_payment === $payment_method->slug())
-                    || (! $this->checkout->selected_method_of_payment && $payment_method->open_by_default())
+                    || ( ! $this->checkout->selected_method_of_payment && $payment_method->open_by_default())
                 ) {
                     $this->checkout->selected_method_of_payment = $payment_method->slug();
                     $this->_save_selected_method_of_payment();
-                    $default_payment_method_option[ $payment_method->slug() ] = $payment_method_button;
+                    $default_payment_method_option[$payment_method->slug()] = $payment_method_button;
                 } else {
-                    $available_payment_method_options[ $payment_method->slug() ] = $payment_method_button;
+                    $available_payment_method_options[$payment_method->slug()] = $payment_method_button;
                 }
-                $payment_methods_billing_info[ $payment_method->slug() . '-info' ] =
+                $payment_methods_billing_info[$payment_method->slug().'-info'] =
                     $this->_payment_method_billing_info(
                         $payment_method
                     );
@@ -1057,7 +1057,7 @@ 
         $available_payment_methods['available_payment_methods'] = $this->_available_payment_method_inputs(
             $available_payment_method_options
         );
-        $available_payment_methods                              += $payment_methods_billing_info;
+        $available_payment_methods += $payment_methods_billing_info;
         // build the available payment methods form
         return new EE_Form_Section_Proper(
             [
@@ -1080,7 +1080,7 @@ 
      */
     protected function _get_available_payment_methods()
     {
-        if (! empty($this->checkout->available_payment_methods)) {
+        if ( ! empty($this->checkout->available_payment_methods)) {
             return $this->checkout->available_payment_methods;
         }
         $available_payment_methods = [];
@@ -1092,7 +1092,7 @@ 
         );
         foreach ($payment_methods as $payment_method) {
             if ($payment_method instanceof EE_Payment_Method) {
-                $available_payment_methods[ $payment_method->slug() ] = $payment_method;
+                $available_payment_methods[$payment_method->slug()] = $payment_method;
             }
         }
         return $available_payment_methods;
@@ -1187,7 +1187,7 @@ 
         );
         return new EE_Form_Section_Proper(
             [
-                'html_id'         => 'spco-payment-method-info-' . $payment_method->slug(),
+                'html_id'         => 'spco-payment-method-info-'.$payment_method->slug(),
                 'html_class'      => 'spco-payment-method-info-dv',
                 // only display the selected or default PM
                 'html_style'      => $currently_selected ? '' : 'display:none;',
@@ -1216,7 +1216,7 @@ 
         // how have they chosen to pay?
         $this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
         $this->checkout->payment_method             = $this->_get_payment_method_for_selected_method_of_payment();
-        if (! $this->checkout->payment_method instanceof EE_Payment_Method) {
+        if ( ! $this->checkout->payment_method instanceof EE_Payment_Method) {
             return false;
         }
         if (
@@ -1391,7 +1391,7 @@ 
      */
     public function switch_payment_method()
     {
-        if (! $this->_verify_payment_method_is_set()) {
+        if ( ! $this->_verify_payment_method_is_set()) {
             return false;
         }
         if (
@@ -1527,7 +1527,7 @@ 
             }
         }
         // verify payment method
-        if (! $this->checkout->payment_method instanceof EE_Payment_Method) {
+        if ( ! $this->checkout->payment_method instanceof EE_Payment_Method) {
             // get payment method for selected method of payment
             $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment();
         }
@@ -1552,7 +1552,7 @@ 
      */
     public function save_payer_details_via_ajax()
     {
-        if (! $this->_verify_payment_method_is_set()) {
+        if ( ! $this->_verify_payment_method_is_set()) {
             return;
         }
         // generate billing form for selected method of payment if it hasn't been done already
@@ -1562,7 +1562,7 @@ 
             );
         }
         // generate primary attendee from payer info if applicable
-        if (! $this->checkout->transaction_has_primary_registrant()) {
+        if ( ! $this->checkout->transaction_has_primary_registrant()) {
             $attendee = $this->_create_attendee_from_request_data();
             if ($attendee instanceof EE_Attendee) {
                 foreach ($this->checkout->transaction->registrations() as $registration) {
@@ -1593,7 +1593,7 @@ 
     {
         // get State ID
         $STA_ID = $this->request->getRequestParam('state');
-        if (! empty($STA_ID)) {
+        if ( ! empty($STA_ID)) {
             // can we get state object from name ?
             EE_Registry::instance()->load_model('State');
             $state  = EEM_State::instance()->get_col([['STA_name' => $STA_ID], 'limit' => 1], 'STA_ID');
@@ -1601,7 +1601,7 @@ 
         }
         // get Country ISO
         $CNT_ISO = $this->request->getRequestParam('country');
-        if (! empty($CNT_ISO)) {
+        if ( ! empty($CNT_ISO)) {
             // can we get country object from name ?
             EE_Registry::instance()->load_model('Country');
             $country = EEM_Country::instance()->get_col(
@@ -1782,7 +1782,7 @@ 
     protected function _maybe_set_completed(EE_Payment $payment)
     {
         // Do we need to redirect them? If so, there's more work to be done.
-        if (! $payment->redirect_url()) {
+        if ( ! $payment->redirect_url()) {
             $this->set_completed();
         }
     }
@@ -1839,7 +1839,7 @@ 
     private function _process_payment()
     {
         // basically confirm that the event hasn't sold out since they hit the page
-        if (! $this->_last_second_ticket_verifications()) {
+        if ( ! $this->_last_second_ticket_verifications()) {
             return null;
         }
         // ya gotta make a choice man
@@ -1850,7 +1850,7 @@ 
             return null;
         }
         // get EE_Payment_Method object
-        if (! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
+        if ( ! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
             return null;
         }
         // setup billing form
@@ -1859,12 +1859,12 @@ 
                 $this->checkout->payment_method
             );
             // bad billing form ?
-            if (! $this->_billing_form_is_valid()) {
+            if ( ! $this->_billing_form_is_valid()) {
                 return null;
             }
         }
         // ensure primary registrant has been fully processed
-        if (! $this->_setup_primary_registrant_prior_to_payment()) {
+        if ( ! $this->_setup_primary_registrant_prior_to_payment()) {
             return null;
         }
         // if session is close to expiring (under 10 minutes by default)
@@ -1920,7 +1920,7 @@ 
     protected function _last_second_ticket_verifications()
     {
         // don't bother re-validating if not a return visit
-        if (! $this->checkout->revisit) {
+        if ( ! $this->checkout->revisit) {
             return true;
         }
         $registrations = $this->checkout->transaction->registrations();
@@ -1970,7 +1970,7 @@ 
             $this->_get_payment_method_for_selected_method_of_payment()
         );
         $html                        = $payment_method_billing_info->get_html();
-        $html                        .= $this->checkout->redirect_form;
+        $html .= $this->checkout->redirect_form;
         /** @var ResponseInterface $response */
         $response = LoaderFactory::getLoader()->getShared(ResponseInterface::class);
         $response->addOutput($html);
@@ -1986,7 +1986,7 @@ 
      */
     private function _billing_form_is_valid()
     {
-        if (! $this->checkout->payment_method->type_obj()->has_billing_form()) {
+        if ( ! $this->checkout->payment_method->type_obj()->has_billing_form()) {
             return true;
         }
         if ($this->checkout->billing_form instanceof EE_Billing_Info_Form) {
@@ -2104,7 +2104,7 @@ 
     {
         // convert billing form data into an attendee
         $this->checkout->primary_attendee_obj = $this->checkout->billing_form->create_attendee_from_billing_form_data();
-        if (! $this->checkout->primary_attendee_obj instanceof EE_Attendee) {
+        if ( ! $this->checkout->primary_attendee_obj instanceof EE_Attendee) {
             EE_Error::add_error(
                 sprintf(
                     esc_html__(
@@ -2121,7 +2121,7 @@ 
             return false;
         }
         $primary_registration = $this->checkout->transaction->primary_registration();
-        if (! $primary_registration instanceof EE_Registration) {
+        if ( ! $primary_registration instanceof EE_Registration) {
             EE_Error::add_error(
                 sprintf(
                     esc_html__(
@@ -2183,8 +2183,8 @@ 
             return null;
         }
         // get EE_Payment_Method object
-        if (isset($this->checkout->available_payment_methods[ $this->checkout->selected_method_of_payment ])) {
-            $payment_method = $this->checkout->available_payment_methods[ $this->checkout->selected_method_of_payment ];
+        if (isset($this->checkout->available_payment_methods[$this->checkout->selected_method_of_payment])) {
+            $payment_method = $this->checkout->available_payment_methods[$this->checkout->selected_method_of_payment];
         } else {
             // load EEM_Payment_Method
             EE_Registry::instance()->load_model('Payment_Method');
@@ -2192,7 +2192,7 @@ 
             $payment_method     = $EEM_Payment_Method->get_one_by_slug($this->checkout->selected_method_of_payment);
         }
         // verify $payment_method
-        if (! $payment_method instanceof EE_Payment_Method) {
+        if ( ! $payment_method instanceof EE_Payment_Method) {
             // not a payment
             EE_Error::add_error(
                 sprintf(
@@ -2210,7 +2210,7 @@ 
             return null;
         }
         // and verify it has a valid Payment_Method Type object
-        if (! $payment_method->type_obj() instanceof EE_PMT_Base) {
+        if ( ! $payment_method->type_obj() instanceof EE_PMT_Base) {
             // not a payment
             EE_Error::add_error(
                 sprintf(
@@ -2248,7 +2248,7 @@ 
         $payment = null;
         $this->checkout->transaction->save();
         $payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
-        if (! $payment_processor instanceof EE_Payment_Processor) {
+        if ( ! $payment_processor instanceof EE_Payment_Processor) {
             return false;
         }
         try {
@@ -2350,7 +2350,7 @@ 
             return true;
         }
         // verify payment object
-        if (! $payment instanceof EE_Payment) {
+        if ( ! $payment instanceof EE_Payment) {
             // not a payment
             EE_Error::add_error(
                 sprintf(
@@ -2400,7 +2400,7 @@ 
                 // and lastly, let's bump the payment status to pending
                 $payment->set_status(EEM_Payment::status_id_pending);
                 $payment->save();
-            } elseif (! $this->_process_payment_status($payment, EE_PMT_Base::onsite)) {
+            } elseif ( ! $this->_process_payment_status($payment, EE_PMT_Base::onsite)) {
                 // User shouldn't be redirected. So let's process it here.
                 // $this->_setup_redirect_for_next_step();
                 $this->checkout->continue_reg = false;
@@ -2481,7 +2481,7 @@ 
                     return false;
                 // bad payment
                 case EEM_Payment::status_id_failed:
-                    if (! empty($msg)) {
+                    if ( ! empty($msg)) {
                         EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
                         return false;
                     }
@@ -2539,18 +2539,18 @@ 
         // how have they chosen to pay?
         $this->checkout->selected_method_of_payment = $this->_get_selected_method_of_payment(true);
         // get EE_Payment_Method object
-        if (! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
+        if ( ! $this->checkout->payment_method = $this->_get_payment_method_for_selected_method_of_payment()) {
             $this->checkout->continue_reg = false;
             return false;
         }
-        if (! $this->checkout->payment_method->is_off_site()) {
+        if ( ! $this->checkout->payment_method->is_off_site()) {
             return false;
         }
         $this->_validate_offsite_return();
         // verify TXN
         if ($this->checkout->transaction instanceof EE_Transaction) {
             $gateway = $this->checkout->payment_method->type_obj()->get_gateway();
-            if (! $gateway instanceof EE_Offsite_Gateway) {
+            if ( ! $gateway instanceof EE_Offsite_Gateway) {
                 $this->checkout->continue_reg = false;
                 return false;
             }
@@ -2564,7 +2564,7 @@ 
                 $this->checkout->payment = $payment;
                 // mark this reg step as completed, as long as gateway doesn't use a separate IPN request,
                 // because we will complete this step during the IPN processing then
-                if (! $this->handle_IPN_in_this_request()) {
+                if ( ! $this->handle_IPN_in_this_request()) {
                     $this->set_completed();
                 }
                 return true;
@@ -2667,13 +2667,13 @@ 
      */
     private function _redirect_wayward_request(EE_Registration $primary_registrant)
     {
-        if (! $primary_registrant instanceof EE_Registration) {
+        if ( ! $primary_registrant instanceof EE_Registration) {
             // try redirecting based on the current TXN
             $primary_registrant = $this->checkout->transaction instanceof EE_Transaction
                 ? $this->checkout->transaction->primary_registration()
                 : null;
         }
-        if (! $primary_registrant instanceof EE_Registration) {
+        if ( ! $primary_registrant instanceof EE_Registration) {
             EE_Error::add_error(
                 sprintf(
                     esc_html__(
@@ -2744,7 +2744,7 @@ 
             $payment = $this->checkout->transaction->last_payment();
             // $payment_source = 'last_payment after Exception';
             // but if we STILL don't have a payment object
-            if (! $payment instanceof EE_Payment) {
+            if ( ! $payment instanceof EE_Payment) {
                 // then we'll object ! ( not object like a thing... but object like what a lawyer says ! )
                 $this->_handle_payment_processor_exception($e);
             }

admin_pages/venues/Venues_Admin_Page.core.php

Indentation +1555 added lines, -1555 removed lines

@@ -13,1565 +13,1565 @@
  */
 class Venues_Admin_Page extends EE_Admin_Page_CPT
 {
-    /**
-     * _venue
-     * This will hold the venue object for venue_details screen.
-     *
-     * @access protected
-     * @var object
-     */
-    protected $_venue;
-
-
-    /**
-     * This will hold the category object for category_details screen.
-     *
-     * @var object
-     */
-    protected $_category;
-
-
-    /**
-     * This property will hold the venue model instance
-     *
-     * @var object
-     */
-    protected $_venue_model;
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _init_page_props()
-    {
-        require_once(EE_MODELS . 'EEM_Venue.model.php');
-        $this->page_slug        = EE_VENUES_PG_SLUG;
-        $this->_admin_base_url  = EE_VENUES_ADMIN_URL;
-        $this->_admin_base_path = EE_ADMIN_PAGES . 'venues';
-        $this->page_label       = esc_html__('Event Venues', 'event_espresso');
-        $this->_cpt_model_names = [
-            'create_new' => 'EEM_Venue',
-            'edit'       => 'EEM_Venue',
-        ];
-        $this->_cpt_edit_routes = [
-            'espresso_venues' => 'edit',
-        ];
-        $this->_venue_model     = EEM_Venue::instance();
-    }
-
-
-    protected function _ajax_hooks()
-    {
-        // todo: all hooks for ee_venues ajax goes in here.
-    }
-
-
-    protected function _define_page_props()
-    {
-        $this->_admin_page_title = $this->page_label;
-        $this->_labels           = [
-            'buttons'      => [
-                'add'             => esc_html__('Add New Venue', 'event_espresso'),
-                'edit'            => esc_html__('Edit Venue', 'event_espresso'),
-                'delete'          => esc_html__('Delete Venue', 'event_espresso'),
-                'add_category'    => esc_html__('Add New Category', 'event_espresso'),
-                'edit_category'   => esc_html__('Edit Category', 'event_espresso'),
-                'delete_category' => esc_html__('Delete Category', 'event_espresso'),
-            ],
-            'editor_title' => [
-                'espresso_venues' => esc_html__('Enter Venue name here', 'event_espresso'),
-            ],
-            'publishbox'   => [
-                'create_new'          => esc_html__('Save New Venue', 'event_espresso'),
-                'edit'                => esc_html__('Update Venue', 'event_espresso'),
-                'add_category'        => esc_html__('Save New Category', 'event_espresso'),
-                'edit_category'       => esc_html__('Update Category', 'event_espresso'),
-                'google_map_settings' => esc_html__('Update Settings', 'event_espresso'),
-            ],
-        ];
-    }
-
-
-    protected function _set_page_routes()
-    {
-
-        // load formatter helper
-        // load field generator helper
-
-        // is there a vnu_id in the request?
-        $VNU_ID = $this->request->getRequestParam('VNU_ID', 0, 'int');
-        $VNU_ID = $this->request->getRequestParam('post', $VNU_ID, 'int');
-
-        $this->_page_routes = [
-            'default'                    => [
-                'func'       => [$this, '_overview_list_table'],
-                'capability' => 'ee_read_venues',
-            ],
-            'create_new'                 => [
-                'func'       => [$this, '_create_new_cpt_item'],
-                'capability' => 'ee_edit_venues',
-            ],
-            'edit'                       => [
-                'func'       => [$this, '_edit_cpt_item'],
-                'capability' => 'ee_edit_venue',
-                'obj_id'     => $VNU_ID,
-            ],
-            'trash_venue'                => [
-                'func'       => [$this, '_trash_or_restore_venue'],
-                'args'       => ['venue_status' => 'trash'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venue',
-                'obj_id'     => $VNU_ID,
-            ],
-            'trash_venues'               => [
-                'func'       => [$this, '_trash_or_restore_venues'],
-                'args'       => ['venue_status' => 'trash'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venues',
-            ],
-            'restore_venue'              => [
-                'func'       => [$this, '_trash_or_restore_venue'],
-                'args'       => ['venue_status' => 'draft'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venue',
-                'obj_id'     => $VNU_ID,
-            ],
-            'restore_venues'             => [
-                'func'       => [$this, '_trash_or_restore_venues'],
-                'args'       => ['venue_status' => 'draft'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venues',
-            ],
-            'delete_venues'              => [
-                'func'       => [$this, '_delete_venues'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venues',
-            ],
-            'delete_venue'               => [
-                'func'       => [$this, '_delete_venue'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venue',
-                'obj_id'     => $VNU_ID,
-            ],
-            // settings related
-            'google_map_settings'        => [
-                'func'       => [$this, '_google_map_settings'],
-                'capability' => 'manage_options',
-            ],
-            'update_google_map_settings' => [
-                'func'       => [$this, '_update_google_map_settings'],
-                'capability' => 'manage_options',
-                'noheader'   => true,
-            ],
-            // venue category tab related
-            'add_category'               => [
-                'func'       => [$this, '_category_details'],
-                'args'       => ['add'],
-                'capability' => 'ee_edit_venue_category',
-            ],
-            'edit_category'              => [
-                'func'       => [$this, '_category_details'],
-                'args'       => ['edit'],
-                'capability' => 'ee_edit_venue_category',
-            ],
-            'delete_categories'          => [
-                'func'       => [$this, '_delete_categories'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venue_category',
-            ],
-
-            'delete_category' => [
-                'func'       => [$this, '_delete_categories'],
-                'noheader'   => true,
-                'capability' => 'ee_delete_venue_category',
-            ],
-
-            'insert_category' => [
-                'func'       => [$this, '_insert_or_update_category'],
-                'args'       => ['new_category' => true],
-                'noheader'   => true,
-                'capability' => 'ee_edit_venue_category',
-            ],
-
-            'update_category'   => [
-                'func'       => [$this, '_insert_or_update_category'],
-                'args'       => ['new_category' => false],
-                'noheader'   => true,
-                'capability' => 'ee_edit_venue_category',
-            ],
-            'export_categories' => [
-                'func'       => [$this, '_categories_export'],
-                'noheader'   => true,
-                'capability' => 'export',
-            ],
-            'import_categories' => [
-                'func'       => [$this, '_import_categories'],
-                'capability' => 'import',
-            ],
-            'category_list'     => [
-                'func'       => [$this, '_category_list_table'],
-                'capability' => 'ee_manage_venue_categories',
-            ],
-        ];
-    }
-
-
-    protected function _set_page_config()
-    {
-        $VNU_ID     = $this->request->getRequestParam('post', 0, 'int');
-        $EVT_CAT_ID = $this->request->getRequestParam('EVT_CAT_ID', 0, 'int');
-
-        $this->_page_config = [
-            'default'             => [
-                'nav'           => [
-                    'label' => esc_html__('Overview', 'event_espresso'),
-                    'order' => 10,
-                ],
-                'list_table'    => 'Venues_Admin_List_Table',
-                'help_tabs'     => [
-                    'venues_overview_help_tab'                           => [
-                        'title'    => esc_html__('Venues Overview', 'event_espresso'),
-                        'filename' => 'venues_overview',
-                    ],
-                    'venues_overview_table_column_headings_help_tab'     => [
-                        'title'    => esc_html__('Venues Overview Table Column Headings', 'event_espresso'),
-                        'filename' => 'venues_overview_table_column_headings',
-                    ],
-                    'venues_overview_views_bulk_actions_search_help_tab' => [
-                        'title'    => esc_html__('Venues Overview Views & Bulk Actions & Search', 'event_espresso'),
-                        'filename' => 'venues_overview_views_bulk_actions_search',
-                    ],
-                ],
-                'metaboxes'     => ['_espresso_news_post_box', '_espresso_links_post_box'],
-                'require_nonce' => false,
-            ],
-            'create_new'          => [
-                'nav'           => [
-                    'label'      => esc_html__('Add Venue', 'event_espresso'),
-                    'order'      => 5,
-                    'persistent' => false,
-                ],
-                'help_tabs'     => [
-                    'venues_editor_help_tab'                                               => [
-                        'title'    => esc_html__('Venue Editor', 'event_espresso'),
-                        'filename' => 'venues_editor',
-                    ],
-                    'venues_editor_title_richtexteditor_help_tab'                          => [
-                        'title'    => esc_html__('Venue Title & Rich Text Editor', 'event_espresso'),
-                        'filename' => 'venues_editor_title_richtexteditor',
-                    ],
-                    'venues_editor_tags_categories_help_tab'                               => [
-                        'title'    => esc_html__('Venue Tags & Categories', 'event_espresso'),
-                        'filename' => 'venues_editor_tags_categories',
-                    ],
-                    'venues_editor_physical_location_google_map_virtual_location_help_tab' => [
-                        'title'    => esc_html__(
-                            'Venue Editor Physical Location & Google Map & Virtual Location',
-                            'event_espresso'
-                        ),
-                        'filename' => 'venues_editor_physical_location_google_map_virtual_location',
-                    ],
-                    'venues_editor_save_new_venue_help_tab'                                => [
-                        'title'    => esc_html__('Save New Venue', 'event_espresso'),
-                        'filename' => 'venues_editor_save_new_venue',
-                    ],
-                    'venues_editor_other_help_tab'                                         => [
-                        'title'    => esc_html__('Venue Editor Other', 'event_espresso'),
-                        'filename' => 'venues_editor_other',
-                    ],
-                ],
-                'metaboxes'     => ['_venue_editor_metaboxes'],
-                'require_nonce' => false,
-            ],
-            'edit'                => [
-                'nav'           => [
-                    'label'      => esc_html__('Edit Venue', 'event_espresso'),
-                    'order'      => 5,
-                    'persistent' => false,
-                    'url'        => $VNU_ID
-                        ? add_query_arg(['post' => $VNU_ID], $this->_current_page_view_url)
-                        : $this->_admin_base_url,
-                ],
-                'help_tabs'     => [
-                    'venues_editor_help_tab'                                               => [
-                        'title'    => esc_html__('Venue Editor', 'event_espresso'),
-                        'filename' => 'venues_editor',
-                    ],
-                    'venues_editor_title_richtexteditor_help_tab'                          => [
-                        'title'    => esc_html__('Venue Title & Rich Text Editor', 'event_espresso'),
-                        'filename' => 'venues_editor_title_richtexteditor',
-                    ],
-                    'venues_editor_tags_categories_help_tab'                               => [
-                        'title'    => esc_html__('Venue Tags & Categories', 'event_espresso'),
-                        'filename' => 'venues_editor_tags_categories',
-                    ],
-                    'venues_editor_physical_location_google_map_virtual_location_help_tab' => [
-                        'title'    => esc_html__(
-                            'Venue Editor Physical Location & Google Map & Virtual Location',
-                            'event_espresso'
-                        ),
-                        'filename' => 'venues_editor_physical_location_google_map_virtual_location',
-                    ],
-                    'venues_editor_save_new_venue_help_tab'                                => [
-                        'title'    => esc_html__('Save New Venue', 'event_espresso'),
-                        'filename' => 'venues_editor_save_new_venue',
-                    ],
-                    'venues_editor_other_help_tab'                                         => [
-                        'title'    => esc_html__('Venue Editor Other', 'event_espresso'),
-                        'filename' => 'venues_editor_other',
-                    ],
-                ],
-                'metaboxes'     => ['_venue_editor_metaboxes'],
-                'require_nonce' => false,
-            ],
-            'google_map_settings' => [
-                'nav'           => [
-                    'label' => esc_html__('Google Maps', 'event_espresso'),
-                    'order' => 40,
-                ],
-                'metaboxes'     => array_merge($this->_default_espresso_metaboxes, ['_publish_post_box']),
-                'help_tabs'     => [
-                    'general_settings_google_maps_help_tab' => [
-                        'title'    => esc_html__('Google Maps', 'event_espresso'),
-                        'filename' => 'general_settings_google_maps',
-                    ],
-                ],
-                'require_nonce' => false,
-            ],
-            // venue category stuff
-            'add_category'        => [
-                'nav'           => [
-                    'label'      => esc_html__('Add Category', 'event_espresso'),
-                    'order'      => 15,
-                    'persistent' => false,
-                ],
-                'metaboxes'     => ['_publish_post_box'],
-                'help_tabs'     => [
-                    'venues_add_category_help_tab' => [
-                        'title'    => esc_html__('Add New Venue Category', 'event_espresso'),
-                        'filename' => 'venues_add_category',
-                    ],
-                ],
-                'require_nonce' => false,
-            ],
-            'edit_category'       => [
-                'nav'           => [
-                    'label'      => esc_html__('Edit Category', 'event_espresso'),
-                    'order'      => 15,
-                    'persistent' => false,
-                    'url'        => $EVT_CAT_ID
-                        ? add_query_arg(['EVT_CAT_ID' => $EVT_CAT_ID], $this->_current_page_view_url)
-                        : $this->_admin_base_url,
-                ],
-                'metaboxes'     => ['_publish_post_box'],
-                'help_tabs'     => [
-                    'venues_edit_category_help_tab' => [
-                        'title'    => esc_html__('Edit Venue Category', 'event_espresso'),
-                        'filename' => 'venues_edit_category',
-                    ],
-                ],
-                'require_nonce' => false,
-            ],
-            'category_list'       => [
-                'nav'           => [
-                    'label' => esc_html__('Categories', 'event_espresso'),
-                    'order' => 20,
-                ],
-                'list_table'    => 'Venue_Categories_Admin_List_Table',
-                'help_tabs'     => [
-                    'venues_categories_help_tab'                       => [
-                        'title'    => esc_html__('Venue Categories', 'event_espresso'),
-                        'filename' => 'venues_categories',
-                    ],
-                    'venues_categories_table_column_headings_help_tab' => [
-                        'title'    => esc_html__('Venue Categories Table Column Headings', 'event_espresso'),
-                        'filename' => 'venues_categories_table_column_headings',
-                    ],
-                    'venues_categories_views_help_tab'                 => [
-                        'title'    => esc_html__('Venue Categories Views', 'event_espresso'),
-                        'filename' => 'venues_categories_views',
-                    ],
-                    'venues_categories_other_help_tab'                 => [
-                        'title'    => esc_html__('Venue Categories Other', 'event_espresso'),
-                        'filename' => 'venues_categories_other',
-                    ],
-                ],
-                'metaboxes'     => $this->_default_espresso_metaboxes,
-                'require_nonce' => false,
-            ],
-        ];
-    }
-
-
-    protected function _add_screen_options()
-    {
-        // todo
-    }
-
-
-    protected function _add_screen_options_default()
-    {
-        $this->_per_page_screen_option();
-    }
-
-
-    protected function _add_screen_options_category_list()
-    {
-        $page_title              = $this->_admin_page_title;
-        $this->_admin_page_title = esc_html__('Venue Categories', 'event_espresso');
-        $this->_per_page_screen_option();
-        $this->_admin_page_title = $page_title;
-    }
-
-
-    // none of the below group are currently used for Event Venues
-    protected function _add_feature_pointers()
-    {
-    }
-
-
-    public function admin_init()
-    {
-    }
-
-
-    public function admin_notices()
-    {
-    }
-
-
-    public function admin_footer_scripts()
-    {
-    }
-
-
-    public function load_scripts_styles_create_new()
-    {
-        $this->load_scripts_styles_edit();
-    }
-
-
-    public function load_scripts_styles()
-    {
-        wp_register_style('ee-cat-admin', EVENTS_ASSETS_URL . 'ee-cat-admin.css', [], EVENT_ESPRESSO_VERSION);
-        wp_enqueue_style('ee-cat-admin');
-    }
-
-
-    public function load_scripts_styles_add_category()
-    {
-        $this->load_scripts_styles_edit_category();
-    }
-
-
-    public function load_scripts_styles_edit_category()
-    {
-    }
-
-
-    public function load_scripts_styles_edit()
-    {
-        // styles
-        wp_enqueue_style('espresso-ui-theme');
-        wp_register_style(
-            'espresso_venues',
-            EE_VENUES_ASSETS_URL . 'ee-venues-admin.css',
-            [],
-            EVENT_ESPRESSO_VERSION
-        );
-        wp_enqueue_style('espresso_venues');
-    }
-
-
-    protected function _set_list_table_views_default()
-    {
-        $this->_views = [
-            'all' => [
-                'slug'        => 'all',
-                'label'       => esc_html__('View All Venues', 'event_espresso'),
-                'count'       => 0,
-                'bulk_action' => [],
-            ],
-        ];
-
-        if (EE_Registry::instance()->CAP->current_user_can('ee_delete_venues', 'espresso_venues_trash_venues')) {
-            $this->_views['all']['bulk_action'] = [
-                'trash_venues' => esc_html__('Move to Trash', 'event_espresso'),
-            ];
-            $this->_views['trash']              = [
-                'slug'        => 'trash',
-                'label'       => esc_html__('Trash', 'event_espresso'),
-                'count'       => 0,
-                'bulk_action' => [
-                    'restore_venues' => esc_html__('Restore from Trash', 'event_espresso'),
-                    'delete_venues'  => esc_html__('Delete', 'event_espresso'),
-                ],
-            ];
-        }
-    }
-
-
-    protected function _set_list_table_views_category_list()
-    {
-        $this->_views = [
-            'all' => [
-                'slug'        => 'all',
-                'label'       => esc_html__('All', 'event_espresso'),
-                'count'       => 0,
-                'bulk_action' => [
-                    'delete_categories' => esc_html__('Delete Permanently', 'event_espresso'),
-                ],
-            ],
-        ];
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _overview_list_table()
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        $this->_template_args['after_list_table'] = EEH_Template::get_button_or_link(
-            get_post_type_archive_link('espresso_venues'),
-            esc_html__("View Venue Archive Page", "event_espresso"),
-            'button'
-        );
-
-        $this->_admin_page_title .= ' ' . $this->get_action_link_or_button(
-            'create_new',
-            'add',
-            [],
-            'add-new-h2'
-        );
-
-        $this->_search_btn_label  = esc_html__('Venues', 'event_espresso');
-        $this->display_admin_list_table_page_with_sidebar();
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function extra_misc_actions_publish_box()
-    {
-        $extra_rows = [
-            'vnu_capacity' => $this->_cpt_model_obj->get_f('VNU_capacity'),
-            'vnu_url'      => $this->_cpt_model_obj->get_f('VNU_url'),
-            'vnu_phone'    => $this->_cpt_model_obj->get_f('VNU_phone'),
-        ];
-        $template   = EE_VENUES_TEMPLATE_PATH . 'venue_publish_box_extras.template.php';
-        EEH_Template::display_template($template, $extra_rows);
-    }
-
-
-    /*************        Google Maps        *************
+	/**
+	 * _venue
+	 * This will hold the venue object for venue_details screen.
+	 *
+	 * @access protected
+	 * @var object
+	 */
+	protected $_venue;
+
+
+	/**
+	 * This will hold the category object for category_details screen.
+	 *
+	 * @var object
+	 */
+	protected $_category;
+
+
+	/**
+	 * This property will hold the venue model instance
+	 *
+	 * @var object
+	 */
+	protected $_venue_model;
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _init_page_props()
+	{
+		require_once(EE_MODELS . 'EEM_Venue.model.php');
+		$this->page_slug        = EE_VENUES_PG_SLUG;
+		$this->_admin_base_url  = EE_VENUES_ADMIN_URL;
+		$this->_admin_base_path = EE_ADMIN_PAGES . 'venues';
+		$this->page_label       = esc_html__('Event Venues', 'event_espresso');
+		$this->_cpt_model_names = [
+			'create_new' => 'EEM_Venue',
+			'edit'       => 'EEM_Venue',
+		];
+		$this->_cpt_edit_routes = [
+			'espresso_venues' => 'edit',
+		];
+		$this->_venue_model     = EEM_Venue::instance();
+	}
+
+
+	protected function _ajax_hooks()
+	{
+		// todo: all hooks for ee_venues ajax goes in here.
+	}
+
+
+	protected function _define_page_props()
+	{
+		$this->_admin_page_title = $this->page_label;
+		$this->_labels           = [
+			'buttons'      => [
+				'add'             => esc_html__('Add New Venue', 'event_espresso'),
+				'edit'            => esc_html__('Edit Venue', 'event_espresso'),
+				'delete'          => esc_html__('Delete Venue', 'event_espresso'),
+				'add_category'    => esc_html__('Add New Category', 'event_espresso'),
+				'edit_category'   => esc_html__('Edit Category', 'event_espresso'),
+				'delete_category' => esc_html__('Delete Category', 'event_espresso'),
+			],
+			'editor_title' => [
+				'espresso_venues' => esc_html__('Enter Venue name here', 'event_espresso'),
+			],
+			'publishbox'   => [
+				'create_new'          => esc_html__('Save New Venue', 'event_espresso'),
+				'edit'                => esc_html__('Update Venue', 'event_espresso'),
+				'add_category'        => esc_html__('Save New Category', 'event_espresso'),
+				'edit_category'       => esc_html__('Update Category', 'event_espresso'),
+				'google_map_settings' => esc_html__('Update Settings', 'event_espresso'),
+			],
+		];
+	}
+
+
+	protected function _set_page_routes()
+	{
+
+		// load formatter helper
+		// load field generator helper
+
+		// is there a vnu_id in the request?
+		$VNU_ID = $this->request->getRequestParam('VNU_ID', 0, 'int');
+		$VNU_ID = $this->request->getRequestParam('post', $VNU_ID, 'int');
+
+		$this->_page_routes = [
+			'default'                    => [
+				'func'       => [$this, '_overview_list_table'],
+				'capability' => 'ee_read_venues',
+			],
+			'create_new'                 => [
+				'func'       => [$this, '_create_new_cpt_item'],
+				'capability' => 'ee_edit_venues',
+			],
+			'edit'                       => [
+				'func'       => [$this, '_edit_cpt_item'],
+				'capability' => 'ee_edit_venue',
+				'obj_id'     => $VNU_ID,
+			],
+			'trash_venue'                => [
+				'func'       => [$this, '_trash_or_restore_venue'],
+				'args'       => ['venue_status' => 'trash'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venue',
+				'obj_id'     => $VNU_ID,
+			],
+			'trash_venues'               => [
+				'func'       => [$this, '_trash_or_restore_venues'],
+				'args'       => ['venue_status' => 'trash'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venues',
+			],
+			'restore_venue'              => [
+				'func'       => [$this, '_trash_or_restore_venue'],
+				'args'       => ['venue_status' => 'draft'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venue',
+				'obj_id'     => $VNU_ID,
+			],
+			'restore_venues'             => [
+				'func'       => [$this, '_trash_or_restore_venues'],
+				'args'       => ['venue_status' => 'draft'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venues',
+			],
+			'delete_venues'              => [
+				'func'       => [$this, '_delete_venues'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venues',
+			],
+			'delete_venue'               => [
+				'func'       => [$this, '_delete_venue'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venue',
+				'obj_id'     => $VNU_ID,
+			],
+			// settings related
+			'google_map_settings'        => [
+				'func'       => [$this, '_google_map_settings'],
+				'capability' => 'manage_options',
+			],
+			'update_google_map_settings' => [
+				'func'       => [$this, '_update_google_map_settings'],
+				'capability' => 'manage_options',
+				'noheader'   => true,
+			],
+			// venue category tab related
+			'add_category'               => [
+				'func'       => [$this, '_category_details'],
+				'args'       => ['add'],
+				'capability' => 'ee_edit_venue_category',
+			],
+			'edit_category'              => [
+				'func'       => [$this, '_category_details'],
+				'args'       => ['edit'],
+				'capability' => 'ee_edit_venue_category',
+			],
+			'delete_categories'          => [
+				'func'       => [$this, '_delete_categories'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venue_category',
+			],
+
+			'delete_category' => [
+				'func'       => [$this, '_delete_categories'],
+				'noheader'   => true,
+				'capability' => 'ee_delete_venue_category',
+			],
+
+			'insert_category' => [
+				'func'       => [$this, '_insert_or_update_category'],
+				'args'       => ['new_category' => true],
+				'noheader'   => true,
+				'capability' => 'ee_edit_venue_category',
+			],
+
+			'update_category'   => [
+				'func'       => [$this, '_insert_or_update_category'],
+				'args'       => ['new_category' => false],
+				'noheader'   => true,
+				'capability' => 'ee_edit_venue_category',
+			],
+			'export_categories' => [
+				'func'       => [$this, '_categories_export'],
+				'noheader'   => true,
+				'capability' => 'export',
+			],
+			'import_categories' => [
+				'func'       => [$this, '_import_categories'],
+				'capability' => 'import',
+			],
+			'category_list'     => [
+				'func'       => [$this, '_category_list_table'],
+				'capability' => 'ee_manage_venue_categories',
+			],
+		];
+	}
+
+
+	protected function _set_page_config()
+	{
+		$VNU_ID     = $this->request->getRequestParam('post', 0, 'int');
+		$EVT_CAT_ID = $this->request->getRequestParam('EVT_CAT_ID', 0, 'int');
+
+		$this->_page_config = [
+			'default'             => [
+				'nav'           => [
+					'label' => esc_html__('Overview', 'event_espresso'),
+					'order' => 10,
+				],
+				'list_table'    => 'Venues_Admin_List_Table',
+				'help_tabs'     => [
+					'venues_overview_help_tab'                           => [
+						'title'    => esc_html__('Venues Overview', 'event_espresso'),
+						'filename' => 'venues_overview',
+					],
+					'venues_overview_table_column_headings_help_tab'     => [
+						'title'    => esc_html__('Venues Overview Table Column Headings', 'event_espresso'),
+						'filename' => 'venues_overview_table_column_headings',
+					],
+					'venues_overview_views_bulk_actions_search_help_tab' => [
+						'title'    => esc_html__('Venues Overview Views & Bulk Actions & Search', 'event_espresso'),
+						'filename' => 'venues_overview_views_bulk_actions_search',
+					],
+				],
+				'metaboxes'     => ['_espresso_news_post_box', '_espresso_links_post_box'],
+				'require_nonce' => false,
+			],
+			'create_new'          => [
+				'nav'           => [
+					'label'      => esc_html__('Add Venue', 'event_espresso'),
+					'order'      => 5,
+					'persistent' => false,
+				],
+				'help_tabs'     => [
+					'venues_editor_help_tab'                                               => [
+						'title'    => esc_html__('Venue Editor', 'event_espresso'),
+						'filename' => 'venues_editor',
+					],
+					'venues_editor_title_richtexteditor_help_tab'                          => [
+						'title'    => esc_html__('Venue Title & Rich Text Editor', 'event_espresso'),
+						'filename' => 'venues_editor_title_richtexteditor',
+					],
+					'venues_editor_tags_categories_help_tab'                               => [
+						'title'    => esc_html__('Venue Tags & Categories', 'event_espresso'),
+						'filename' => 'venues_editor_tags_categories',
+					],
+					'venues_editor_physical_location_google_map_virtual_location_help_tab' => [
+						'title'    => esc_html__(
+							'Venue Editor Physical Location & Google Map & Virtual Location',
+							'event_espresso'
+						),
+						'filename' => 'venues_editor_physical_location_google_map_virtual_location',
+					],
+					'venues_editor_save_new_venue_help_tab'                                => [
+						'title'    => esc_html__('Save New Venue', 'event_espresso'),
+						'filename' => 'venues_editor_save_new_venue',
+					],
+					'venues_editor_other_help_tab'                                         => [
+						'title'    => esc_html__('Venue Editor Other', 'event_espresso'),
+						'filename' => 'venues_editor_other',
+					],
+				],
+				'metaboxes'     => ['_venue_editor_metaboxes'],
+				'require_nonce' => false,
+			],
+			'edit'                => [
+				'nav'           => [
+					'label'      => esc_html__('Edit Venue', 'event_espresso'),
+					'order'      => 5,
+					'persistent' => false,
+					'url'        => $VNU_ID
+						? add_query_arg(['post' => $VNU_ID], $this->_current_page_view_url)
+						: $this->_admin_base_url,
+				],
+				'help_tabs'     => [
+					'venues_editor_help_tab'                                               => [
+						'title'    => esc_html__('Venue Editor', 'event_espresso'),
+						'filename' => 'venues_editor',
+					],
+					'venues_editor_title_richtexteditor_help_tab'                          => [
+						'title'    => esc_html__('Venue Title & Rich Text Editor', 'event_espresso'),
+						'filename' => 'venues_editor_title_richtexteditor',
+					],
+					'venues_editor_tags_categories_help_tab'                               => [
+						'title'    => esc_html__('Venue Tags & Categories', 'event_espresso'),
+						'filename' => 'venues_editor_tags_categories',
+					],
+					'venues_editor_physical_location_google_map_virtual_location_help_tab' => [
+						'title'    => esc_html__(
+							'Venue Editor Physical Location & Google Map & Virtual Location',
+							'event_espresso'
+						),
+						'filename' => 'venues_editor_physical_location_google_map_virtual_location',
+					],
+					'venues_editor_save_new_venue_help_tab'                                => [
+						'title'    => esc_html__('Save New Venue', 'event_espresso'),
+						'filename' => 'venues_editor_save_new_venue',
+					],
+					'venues_editor_other_help_tab'                                         => [
+						'title'    => esc_html__('Venue Editor Other', 'event_espresso'),
+						'filename' => 'venues_editor_other',
+					],
+				],
+				'metaboxes'     => ['_venue_editor_metaboxes'],
+				'require_nonce' => false,
+			],
+			'google_map_settings' => [
+				'nav'           => [
+					'label' => esc_html__('Google Maps', 'event_espresso'),
+					'order' => 40,
+				],
+				'metaboxes'     => array_merge($this->_default_espresso_metaboxes, ['_publish_post_box']),
+				'help_tabs'     => [
+					'general_settings_google_maps_help_tab' => [
+						'title'    => esc_html__('Google Maps', 'event_espresso'),
+						'filename' => 'general_settings_google_maps',
+					],
+				],
+				'require_nonce' => false,
+			],
+			// venue category stuff
+			'add_category'        => [
+				'nav'           => [
+					'label'      => esc_html__('Add Category', 'event_espresso'),
+					'order'      => 15,
+					'persistent' => false,
+				],
+				'metaboxes'     => ['_publish_post_box'],
+				'help_tabs'     => [
+					'venues_add_category_help_tab' => [
+						'title'    => esc_html__('Add New Venue Category', 'event_espresso'),
+						'filename' => 'venues_add_category',
+					],
+				],
+				'require_nonce' => false,
+			],
+			'edit_category'       => [
+				'nav'           => [
+					'label'      => esc_html__('Edit Category', 'event_espresso'),
+					'order'      => 15,
+					'persistent' => false,
+					'url'        => $EVT_CAT_ID
+						? add_query_arg(['EVT_CAT_ID' => $EVT_CAT_ID], $this->_current_page_view_url)
+						: $this->_admin_base_url,
+				],
+				'metaboxes'     => ['_publish_post_box'],
+				'help_tabs'     => [
+					'venues_edit_category_help_tab' => [
+						'title'    => esc_html__('Edit Venue Category', 'event_espresso'),
+						'filename' => 'venues_edit_category',
+					],
+				],
+				'require_nonce' => false,
+			],
+			'category_list'       => [
+				'nav'           => [
+					'label' => esc_html__('Categories', 'event_espresso'),
+					'order' => 20,
+				],
+				'list_table'    => 'Venue_Categories_Admin_List_Table',
+				'help_tabs'     => [
+					'venues_categories_help_tab'                       => [
+						'title'    => esc_html__('Venue Categories', 'event_espresso'),
+						'filename' => 'venues_categories',
+					],
+					'venues_categories_table_column_headings_help_tab' => [
+						'title'    => esc_html__('Venue Categories Table Column Headings', 'event_espresso'),
+						'filename' => 'venues_categories_table_column_headings',
+					],
+					'venues_categories_views_help_tab'                 => [
+						'title'    => esc_html__('Venue Categories Views', 'event_espresso'),
+						'filename' => 'venues_categories_views',
+					],
+					'venues_categories_other_help_tab'                 => [
+						'title'    => esc_html__('Venue Categories Other', 'event_espresso'),
+						'filename' => 'venues_categories_other',
+					],
+				],
+				'metaboxes'     => $this->_default_espresso_metaboxes,
+				'require_nonce' => false,
+			],
+		];
+	}
+
+
+	protected function _add_screen_options()
+	{
+		// todo
+	}
+
+
+	protected function _add_screen_options_default()
+	{
+		$this->_per_page_screen_option();
+	}
+
+
+	protected function _add_screen_options_category_list()
+	{
+		$page_title              = $this->_admin_page_title;
+		$this->_admin_page_title = esc_html__('Venue Categories', 'event_espresso');
+		$this->_per_page_screen_option();
+		$this->_admin_page_title = $page_title;
+	}
+
+
+	// none of the below group are currently used for Event Venues
+	protected function _add_feature_pointers()
+	{
+	}
+
+
+	public function admin_init()
+	{
+	}
+
+
+	public function admin_notices()
+	{
+	}
+
+
+	public function admin_footer_scripts()
+	{
+	}
+
+
+	public function load_scripts_styles_create_new()
+	{
+		$this->load_scripts_styles_edit();
+	}
+
+
+	public function load_scripts_styles()
+	{
+		wp_register_style('ee-cat-admin', EVENTS_ASSETS_URL . 'ee-cat-admin.css', [], EVENT_ESPRESSO_VERSION);
+		wp_enqueue_style('ee-cat-admin');
+	}
+
+
+	public function load_scripts_styles_add_category()
+	{
+		$this->load_scripts_styles_edit_category();
+	}
+
+
+	public function load_scripts_styles_edit_category()
+	{
+	}
+
+
+	public function load_scripts_styles_edit()
+	{
+		// styles
+		wp_enqueue_style('espresso-ui-theme');
+		wp_register_style(
+			'espresso_venues',
+			EE_VENUES_ASSETS_URL . 'ee-venues-admin.css',
+			[],
+			EVENT_ESPRESSO_VERSION
+		);
+		wp_enqueue_style('espresso_venues');
+	}
+
+
+	protected function _set_list_table_views_default()
+	{
+		$this->_views = [
+			'all' => [
+				'slug'        => 'all',
+				'label'       => esc_html__('View All Venues', 'event_espresso'),
+				'count'       => 0,
+				'bulk_action' => [],
+			],
+		];
+
+		if (EE_Registry::instance()->CAP->current_user_can('ee_delete_venues', 'espresso_venues_trash_venues')) {
+			$this->_views['all']['bulk_action'] = [
+				'trash_venues' => esc_html__('Move to Trash', 'event_espresso'),
+			];
+			$this->_views['trash']              = [
+				'slug'        => 'trash',
+				'label'       => esc_html__('Trash', 'event_espresso'),
+				'count'       => 0,
+				'bulk_action' => [
+					'restore_venues' => esc_html__('Restore from Trash', 'event_espresso'),
+					'delete_venues'  => esc_html__('Delete', 'event_espresso'),
+				],
+			];
+		}
+	}
+
+
+	protected function _set_list_table_views_category_list()
+	{
+		$this->_views = [
+			'all' => [
+				'slug'        => 'all',
+				'label'       => esc_html__('All', 'event_espresso'),
+				'count'       => 0,
+				'bulk_action' => [
+					'delete_categories' => esc_html__('Delete Permanently', 'event_espresso'),
+				],
+			],
+		];
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _overview_list_table()
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		$this->_template_args['after_list_table'] = EEH_Template::get_button_or_link(
+			get_post_type_archive_link('espresso_venues'),
+			esc_html__("View Venue Archive Page", "event_espresso"),
+			'button'
+		);
+
+		$this->_admin_page_title .= ' ' . $this->get_action_link_or_button(
+			'create_new',
+			'add',
+			[],
+			'add-new-h2'
+		);
+
+		$this->_search_btn_label  = esc_html__('Venues', 'event_espresso');
+		$this->display_admin_list_table_page_with_sidebar();
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function extra_misc_actions_publish_box()
+	{
+		$extra_rows = [
+			'vnu_capacity' => $this->_cpt_model_obj->get_f('VNU_capacity'),
+			'vnu_url'      => $this->_cpt_model_obj->get_f('VNU_url'),
+			'vnu_phone'    => $this->_cpt_model_obj->get_f('VNU_phone'),
+		];
+		$template   = EE_VENUES_TEMPLATE_PATH . 'venue_publish_box_extras.template.php';
+		EEH_Template::display_template($template, $extra_rows);
+	}
+
+
+	/*************        Google Maps        *************
      *
      * @throws EE_Error
      * @throws EE_Error
      */
 
 
-    protected function _google_map_settings()
-    {
-
-
-        $this->_template_args['values']           = $this->_yes_no_values;
-        $default_map_settings                     = new stdClass();
-        $default_map_settings->use_google_maps    = true;
-        $default_map_settings->google_map_api_key = '';
-        // for event details pages (reg page)
-        $default_map_settings->event_details_map_width    = 585;
-        // ee_map_width_single
-        $default_map_settings->event_details_map_height   = 362;
-        // ee_map_height_single
-        $default_map_settings->event_details_map_zoom     = 14;
-        // ee_map_zoom_single
-        $default_map_settings->event_details_display_nav  = true;
-        // ee_map_nav_display_single
-        $default_map_settings->event_details_nav_size     = false;
-        // ee_map_nav_size_single
-        $default_map_settings->event_details_control_type = 'default';
-        // ee_map_type_control_single
-        $default_map_settings->event_details_map_align    = 'center';
-        // ee_map_align_single
-
-        // for event list pages
-        $default_map_settings->event_list_map_width    = 300;
-        // ee_map_width
-        $default_map_settings->event_list_map_height   = 185;
-        // ee_map_height
-        $default_map_settings->event_list_map_zoom     = 12;
-        // ee_map_zoom
-        $default_map_settings->event_list_display_nav  = false;
-        // ee_map_nav_display
-        $default_map_settings->event_list_nav_size     = true;
-        // ee_map_nav_size
-        $default_map_settings->event_list_control_type = 'dropdown';
-        // ee_map_type_control
-        $default_map_settings->event_list_map_align    = 'center';
-        // ee_map_align
-
-        $this->_template_args['map_settings'] =
-            isset(EE_Registry::instance()->CFG->map_settings)
-            && ! empty(EE_Registry::instance()->CFG->map_settings)
-                ? (object) array_merge(
-                    (array) $default_map_settings,
-                    (array) EE_Registry::instance()->CFG->map_settings
-                )
-                : $default_map_settings;
-
-        $this->_set_add_edit_form_tags('update_google_map_settings');
-        $this->_set_publish_post_box_vars(null, false, false, null, false);
-        $this->_template_args['admin_page_content'] = EEH_Template::display_template(
-            EE_VENUES_TEMPLATE_PATH . 'google_map.template.php',
-            $this->_template_args,
-            true
-        );
-        $this->display_admin_page_with_sidebar();
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _update_google_map_settings()
-    {
-        $map_settings = EE_Registry::instance()->CFG->map_settings;
-
-        $settings = [
-            'use_google_maps'            => 'int',
-            'google_map_api_key'         => 'string',
-            'event_details_map_width'    => 'int',
-            'event_details_map_zoom'     => 'int',
-            'event_details_display_nav'  => 'int',
-            'event_details_nav_size'     => 'int',
-            'event_details_control_type' => 'string',
-            'event_details_map_align'    => 'string',
-            'event_list_map_width'       => 'int',
-            'event_list_map_height'      => 'int',
-            'event_list_map_zoom'        => 'int',
-            'event_list_display_nav'     => 'int',
-            'event_list_nav_size'        => 'int',
-            'event_list_control_type'    => 'string',
-            'event_list_map_align'       => 'string',
-        ];
-
-        foreach ($settings as $setting => $type) {
-            $map_settings->{$setting} = $this->request->getRequestParam($setting, $map_settings->{$setting}, $type);
-        }
-
-        EE_Registry::instance()->CFG->map_settings = apply_filters(
-            'FHEE__Extend_General_Settings_Admin_Page___update_google_map_settings__CFG_map_settings',
-            $map_settings
-        );
-
-        $what    = 'Google Map Settings';
-        $success = $this->_update_espresso_configuration(
-            $what,
-            EE_Registry::instance()->CFG->map_settings,
-            __FILE__,
-            __FUNCTION__,
-            __LINE__
-        );
-        $this->_redirect_after_action($success, $what, 'updated', ['action' => 'google_map_settings']);
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _venue_editor_metaboxes()
-    {
-        $this->verify_cpt_object();
-
-        add_meta_box(
-            'espresso_venue_address_options',
-            esc_html__('Physical Location', 'event_espresso'),
-            [$this, 'venue_address_metabox'],
-            $this->page_slug,
-            'side'
-        );
-        add_meta_box(
-            'espresso_venue_gmap_options',
-            esc_html__('Google Map', 'event_espresso'),
-            [$this, 'venue_gmap_metabox'],
-            $this->page_slug,
-            'side'
-        );
-        add_meta_box(
-            'espresso_venue_virtual_loc_options',
-            esc_html__('Virtual Location', 'event_espresso'),
-            [$this, 'venue_virtual_loc_metabox'],
-            $this->page_slug,
-            'side'
-        );
-    }
-
-
-    public function venue_gmap_metabox()
-    {
-        $template_args = [
-            'vnu_enable_for_gmap' => EEH_Form_Fields::select_input(
-                'vnu_enable_for_gmap',
-                $this->get_yes_no_values(),
-                $this->_cpt_model_obj instanceof EE_Venue ? $this->_cpt_model_obj->enable_for_gmap() : false
-            ),
-            'vnu_google_map_link' => $this->_cpt_model_obj->google_map_link(),
-        ];
-        $template      = EE_VENUES_TEMPLATE_PATH . 'venue_gmap_metabox_content.template.php';
-        EEH_Template::display_template($template, $template_args);
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function venue_address_metabox()
-    {
-        $template_args['_venue'] = $this->_cpt_model_obj;
-
-        $template_args['states_dropdown']    = EEH_Form_Fields::generate_form_input(
-            new EE_Question_Form_Input(
-                EE_Question::new_instance(
-                    ['QST_display_text' => esc_html__('State', 'event_espresso'), 'QST_system' => 'state']
-                ),
-                EE_Answer::new_instance(
-                    [
-                        'ANS_value' => $this->_cpt_model_obj instanceof EE_Venue
-                            ? $this->_cpt_model_obj->state_ID()
-                            : 0,
-                    ]
-                ),
-                [
-                    'input_name'     => 'sta_id',
-                    'input_id'       => 'sta_id',
-                    'input_class'    => '',
-                    'input_prefix'   => '',
-                    'append_qstn_id' => false,
-                ]
-            )
-        );
-        $template_args['countries_dropdown'] = EEH_Form_Fields::generate_form_input(
-            new EE_Question_Form_Input(
-                EE_Question::new_instance(
-                    ['QST_display_text' => esc_html__('Country', 'event_espresso'), 'QST_system' => 'country']
-                ),
-                EE_Answer::new_instance(
-                    [
-                        'ANS_value' => $this->_cpt_model_obj instanceof EE_Venue
-                            ? $this->_cpt_model_obj->country_ID()
-                            : 0,
-                    ]
-                ),
-                [
-                    'input_name'     => 'cnt_iso',
-                    'input_id'       => 'cnt_iso',
-                    'input_class'    => '',
-                    'input_prefix'   => '',
-                    'append_qstn_id' => false,
-                ]
-            )
-        );
-
-        $template = EE_VENUES_TEMPLATE_PATH . 'venue_address_metabox_content.template.php';
-        EEH_Template::display_template($template, $template_args);
-    }
-
-
-    public function venue_virtual_loc_metabox()
-    {
-        $template_args = [
-            '_venue' => $this->_cpt_model_obj,
-        ];
-        $template      = EE_VENUES_TEMPLATE_PATH . 'venue_virtual_location_metabox_content.template.php';
-        EEH_Template::display_template($template, $template_args);
-    }
-
-
-    protected function _restore_cpt_item($post_id, $revision_id)
-    {
-        $venue_obj = $this->_venue_model->get_one_by_ID($post_id);
-
-        // meta revision restore
-        $venue_obj->restore_revision($revision_id);
-    }
-
-
-    /**
-     * Handles updates for venue cpts
-     *
-     * @param int    $post_id ID of Venue CPT
-     * @param WP_Post $post    Post object (with "blessed" WP properties)
-     * @return void
-     */
-    protected function _insert_update_cpt_item($post_id, $post)
-    {
-
-        if ($post instanceof WP_Post && $post->post_type !== 'espresso_venues') {
-            return;// get out we're not processing the saving of venues.
-        }
-
-        $wheres = [$this->_venue_model->primary_key_name() => $post_id];
-
-        $venue_values = [
-            'VNU_address'         => $this->request->getRequestParam('vnu_address'),
-            'VNU_address2'        => $this->request->getRequestParam('vnu_address2'),
-            'VNU_city'            => $this->request->getRequestParam('vnu_city'),
-            'STA_ID'              => $this->request->getRequestParam('sta_id'),
-            'CNT_ISO'             => $this->request->getRequestParam('cnt_iso'),
-            'VNU_zip'             => $this->request->getRequestParam('vnu_zip'),
-            'VNU_phone'           => $this->request->getRequestParam('vnu_phone'),
-            'VNU_capacity'        => $this->request->requestParamIsSet('vnu_capacity')
-                ? str_replace(',', '', $this->request->getRequestParam('vnu_capacity'))
-                : EE_INF,
-            'VNU_url'             => $this->request->getRequestParam('vnu_url'),
-            'VNU_virtual_phone'   => $this->request->getRequestParam('vnu_virtual_phone'),
-            'VNU_virtual_url'     => $this->request->getRequestParam('vnu_virtual_url'),
-            'VNU_enable_for_gmap' => $this->request->getRequestParam('vnu_enable_for_gmap', false, 'bool'),
-            'VNU_google_map_link' => $this->request->getRequestParam('vnu_google_map_link'),
-        ];
-
-        // update venue
-        $success = $this->_venue_model->update($venue_values, [$wheres]);
-
-        // get venue_object for other metaboxes that might be added via the filter... though it would seem to make sense to just use $this->_venue_model->get_one_by_ID( $post_id ).. i have to setup where conditions to override the filters in the model that filter out autodraft and inherit statuses so we GET the inherit id!
-        $get_one_where = [$this->_venue_model->primary_key_name() => $post_id, 'status' => $post->post_status];
-        $venue         = $this->_venue_model->get_one([$get_one_where]);
-
-        // notice we've applied a filter for venue metabox callbacks but we don't actually have any default venue metaboxes in use.  So this is just here for addons to more easily hook into venue saves.
-        $venue_update_callbacks = apply_filters(
-            'FHEE__Venues_Admin_Page___insert_update_cpt_item__venue_update_callbacks',
-            []
-        );
-        $att_success            = true;
-        foreach ($venue_update_callbacks as $v_callback) {
-            // if ANY of these updates fail then we want the appropriate global error message
-            $att_success = call_user_func_array($v_callback, [$venue, $this->request->requestParams()])
-                ? $att_success
-                : false;
-        }
-
-        // any errors?
-        if ($success && ! $att_success) {
-            EE_Error::add_error(
-                esc_html__(
-                    'Venue Details saved successfully but something went wrong with saving attachments.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        } elseif ($success === false) {
-            EE_Error::add_error(
-                esc_html__('Venue Details did not save successfully.', 'event_espresso'),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-    }
-
-
-    /**
-     * @param int $post_id
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function trash_cpt_item($post_id)
-    {
-        $this->request->setRequestParam('VNU_ID', $post_id);
-        $this->_trash_or_restore_venue('trash', false);
-    }
-
-
-    /**
-     * @param int $post_id
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function restore_cpt_item($post_id)
-    {
-        $this->request->setRequestParam('VNU_ID', $post_id);
-        $this->_trash_or_restore_venue('draft', false);
-    }
-
-
-    /**
-     * @param int $post_id
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function delete_cpt_item($post_id)
-    {
-        $this->request->setRequestParam('VNU_ID', $post_id);
-        $this->_delete_venue(false);
-    }
-
-
-    public function get_venue_object()
-    {
-        return $this->_cpt_model_obj;
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _trash_or_restore_venue($venue_status = 'trash', $redirect_after = true)
-    {
-        $VNU_ID = $this->request->getRequestParam('VNU_ID', 0, 'int');
-        // loop thru venues
-        if ($VNU_ID) {
-            // clean status
-            $venue_status = sanitize_key($venue_status);
-            // grab status
-            if (! empty($venue_status)) {
-                $success = $this->_change_venue_status($VNU_ID, $venue_status);
-            } else {
-                $success = false;
-                $msg     = esc_html__(
-                    'An error occurred. The venue could not be moved to the trash because a valid venue status was not not supplied.',
-                    'event_espresso'
-                );
-                EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            }
-        } else {
-            $success = false;
-            $msg     = esc_html__(
-                'An error occurred. The venue could not be moved to the trash because a valid venue ID was not not supplied.',
-                'event_espresso'
-            );
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-        }
-        $action = $venue_status == 'trash' ? 'moved to the trash' : 'restored from the trash';
-
-        if ($redirect_after) {
-            $this->_redirect_after_action($success, 'Venue', $action, ['action' => 'default']);
-        }
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _trash_or_restore_venues($venue_status = 'trash')
-    {
-        // clean status
-        $venue_status = sanitize_key($venue_status);
-        // grab status
-        if (! empty($venue_status)) {
-            $success = true;
-            // determine the event id and set to array.
-            $VNU_IDs = $this->request->getRequestParam('venue_id', [], 'int', true);
-            // loop thru events
-            foreach ($VNU_IDs as $VNU_ID) {
-                if ($VNU_ID = absint($VNU_ID)) {
-                    $results = $this->_change_venue_status($VNU_ID, $venue_status);
-                    $success = $results !== false ? $success : false;
-                } else {
-                    $msg = sprintf(
-                        esc_html__(
-                            'An error occurred. Venue #%d could not be moved to the trash because a valid venue ID was not not supplied.',
-                            'event_espresso'
-                        ),
-                        $VNU_ID
-                    );
-                    EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-                    $success = false;
-                }
-            }
-        } else {
-            $success = false;
-            $msg     = esc_html__(
-                'An error occurred. The venue could not be moved to the trash because a valid venue status was not not supplied.',
-                'event_espresso'
-            );
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-        }
-        // in order to force a pluralized result message we need to send back a success status greater than 1
-        $success = $success ? 2 : false;
-        $action  = $venue_status == 'trash' ? 'moved to the trash' : 'restored from the trash';
-        $this->_redirect_after_action($success, 'Venues', $action, ['action' => 'default']);
-    }
-
-
-    /**
-     * _trash_or_restore_venues
-     *
-     * //todo this is pretty much the same as the corresponding change_event_status method in Events_Admin_Page.  We
-     * should probably abstract this up to the EE_Admin_Page_CPT (or even EE_Admin_Page) and make this a common method
-     * accepting a certain number of params.
-     *
-     * @access  private
-     * @param int    $VNU_ID
-     * @param string $venue_status
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    private function _change_venue_status($VNU_ID = 0, $venue_status = '')
-    {
-        // grab venue id
-        if (! $VNU_ID) {
-            $msg = esc_html__('An error occurred. No Venue ID or an invalid Venue ID was received.', 'event_espresso');
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-
-        $this->_cpt_model_obj = EEM_Venue::instance()->get_one_by_ID($VNU_ID);
-
-        // clean status
-        $venue_status = sanitize_key($venue_status);
-        // grab status
-        if (! $venue_status) {
-            $msg = esc_html__(
-                'An error occurred. No Venue Status or an invalid Venue Status was received.',
-                'event_espresso'
-            );
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-
-        // was event trashed or restored ?
-        switch ($venue_status) {
-            case 'draft':
-                $action = 'restored from the trash';
-                $hook   = 'AHEE_venue_restored_from_trash';
-                break;
-            case 'trash':
-                $action = 'moved to the trash';
-                $hook   = 'AHEE_venue_moved_to_trash';
-                break;
-            default:
-                $action = 'updated';
-                $hook   = false;
-        }
-        // use class to change status
-        $this->_cpt_model_obj->set_status($venue_status);
-        $success = $this->_cpt_model_obj->save();
-
-        if ($success === false) {
-            $msg = sprintf(esc_html__('An error occurred. The venue could not be %s.', 'event_espresso'), $action);
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-        if ($hook) {
-            do_action($hook);
-        }
-        return true;
-    }
-
-
-    /**
-     * @param bool $redirect_after
-     * @return void
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _delete_venue($redirect_after = true)
-    {
-        // determine the venue id and set to array.
-        $VNU_ID = $this->request->getRequestParam('VNU_ID', 0, 'int');
-        $VNU_ID = $this->request->getRequestParam('post', $VNU_ID, 'int');
-
-        // loop thru venues
-        if ($VNU_ID) {
-            $success = $this->_delete_or_trash_venue($VNU_ID);
-        } else {
-            $success = false;
-            $msg     = esc_html__(
-                'An error occurred. An venue could not be deleted because a valid venue ID was not not supplied.',
-                'event_espresso'
-            );
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-        }
-        if ($redirect_after) {
-            $this->_redirect_after_action($success, 'Venue', 'deleted', ['action' => 'default']);
-        }
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _delete_venues()
-    {
-        $success = true;
-        // determine the event id and set to array.
-        $VNU_IDs = $this->request->getRequestParam('venue_id', [], 'int', true);
-        // loop thru events
-        foreach ($VNU_IDs as $VNU_ID) {
-            if ($VNU_ID = absint($VNU_ID)) {
-                $results = $this->_delete_or_trash_venue($VNU_ID);
-                $success = $results !== false ? $success : false;
-            } else {
-                $success = false;
-                $msg     = esc_html__(
-                    'An error occurred. An venue could not be deleted because a valid venue ID was not not supplied.',
-                    'event_espresso'
-                );
-                EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            }
-        }
-        // in order to force a pluralized result message we need to send back a success status greater than 1
-        $success = $success ? 2 : false;
-        $this->_redirect_after_action(
-            $success,
-            esc_html__('Venues', 'event_espresso'),
-            esc_html__('deleted', 'event_espresso'),
-            ['action' => 'default']
-        );
-    }
-
-
-    // todo: put in parent
-
-
-    /**
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    private function _delete_or_trash_venue($VNU_ID = false)
-    {
-        // grab event id
-        if (! $VNU_ID = absint($VNU_ID)) {
-            $msg = esc_html__('An error occurred. No Venue ID or an invalid Venue ID was received.', 'event_espresso');
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-
-
-        $venue = EEM_Venue::instance()->get_one_by_ID($VNU_ID);
-        // first need to remove all term relationships
-        $venue->_remove_relations('Term_Taxonomy');
-        $success = $venue->delete_permanently();
-        // did it all go as planned ?
-        if ($success) {
-            $msg = sprintf(esc_html__('Venue ID # %d has been deleted.', 'event_espresso'), $VNU_ID);
-            EE_Error::add_success($msg);
-        } else {
-            $msg =
-                sprintf(
-                    esc_html__('An error occurred. Venue ID # %d could not be deleted.', 'event_espresso'),
-                    $VNU_ID
-                );
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-        do_action('AHEE__Venues_Admin_Page___delete_or_trash_venue__after_venue_deleted');
-        return true;
-    }
-
-
-
-
-    /***********/
-    /* QUERIES */
-
-
-    public function get_venues($per_page = 10, $count = false)
-    {
-
-        $orderby = $this->request->getRequestParam('orderby', '');
-
-        switch ($orderby) {
-            case 'id':
-                $orderby = 'VNU_ID';
-                break;
-
-            case 'capacity':
-                $orderby = 'VNU_capacity';
-                break;
-
-            case 'city':
-                $orderby = 'VNU_city';
-                break;
-
-            default:
-                $orderby = 'VNU_name';
-        }
-
-        $sort         = $this->request->getRequestParam('order', 'ASC');
-        $current_page = $this->request->getRequestParam('paged', 1, 'int');
-        $per_page     = ! empty($per_page) ? $per_page : 10;
-        $per_page     = $this->request->getRequestParam('perpage', $per_page, 'int');
-
-        $offset = ($current_page - 1) * $per_page;
-        $limit  = [$offset, $per_page];
-
-        $category = $this->request->getRequestParam('category');
-        $category = $category > 0 ? $category : null;
-
-        $where = [];
-
-        // only set initial status if it is in the incoming request.  Otherwise the "all" view display's all statuses.
-        $status = $this->request->getRequestParam('status');
-        if ($status && $status !== 'all') {
-            $where['status'] = $status;
-        }
-
-        $venue_status = $this->request->getRequestParam('venue_status');
-        if ($venue_status) {
-            $where['status'] = $venue_status;
-        }
-
-
-        if ($category) {
-            $where['Term_Taxonomy.taxonomy'] = 'espresso_venue_categories';
-            $where['Term_Taxonomy.term_id']  = $category;
-        }
-
-
-        if (! EE_Registry::instance()->CAP->current_user_can('ee_read_others_venues', 'get_venues')) {
-            $where['VNU_wp_user'] = get_current_user_id();
-        } else {
-            if (! EE_Registry::instance()->CAP->current_user_can('ee_read_private_venues', 'get_venues')) {
-                $where['OR'] = [
-                    'status*restrict_private' => ['!=', 'private'],
-                    'AND'                     => [
-                        'status*inclusive' => ['=', 'private'],
-                        'VNU_wp_user'      => get_current_user_id(),
-                    ],
-                ];
-            }
-        }
-
-        $search_term = $this->request->getRequestParam('s');
-        if ($search_term) {
-            $search_term = '%' . $search_term . '%';
-            $where['OR'] = [
-                'VNU_name'               => ['LIKE', $search_term],
-                'VNU_desc'               => ['LIKE', $search_term],
-                'VNU_short_desc'         => ['LIKE', $search_term],
-                'VNU_address'            => ['LIKE', $search_term],
-                'VNU_address2'           => ['LIKE', $search_term],
-                'VNU_city'               => ['LIKE', $search_term],
-                'VNU_zip'                => ['LIKE', $search_term],
-                'VNU_phone'              => ['LIKE', $search_term],
-                'VNU_url'                => ['LIKE', $search_term],
-                'VNU_virtual_phone'      => ['LIKE', $search_term],
-                'VNU_virtual_url'        => ['LIKE', $search_term],
-                'VNU_google_map_link'    => ['LIKE', $search_term],
-                'Event.EVT_name'         => ['LIKE', $search_term],
-                'Event.EVT_desc'         => ['LIKE', $search_term],
-                'Event.EVT_phone'        => ['LIKE', $search_term],
-                'Event.EVT_external_URL' => ['LIKE', $search_term],
-            ];
-        }
-
-
-        return $count
-            ? $this->_venue_model->count([$where], 'VNU_ID')
-            : $this->_venue_model->get_all(
-                [$where, 'limit' => $limit, 'order_by' => $orderby, 'order' => $sort]
-            );
-    }
-
-
-
-
-    /** Venue Category Stuff **/
-
-    /**
-     * set the _category property with the category object for the loaded page.
-     *
-     * @access private
-     * @return void
-     */
-    private function _set_category_object()
-    {
-        if (isset($this->_category->id) && ! empty($this->_category->id)) {
-            return;
-        } // already have the category object so get out.
-
-        // set default category object
-        $this->_set_empty_category_object();
-
-        // only set if we've got an id
-        $category_ID = $this->request->getRequestParam('VEN_CAT_ID', 0, 'int');
-        if (! $category_ID) {
-            return;
-        }
-
-        $term = get_term($category_ID, 'espresso_venue_categories');
-
-
-        if (! empty($term)) {
-            $this->_category->category_name       = $term->name;
-            $this->_category->category_identifier = $term->slug;
-            $this->_category->category_desc       = $term->description;
-            $this->_category->id                  = $term->term_id;
-            $this->_category->parent              = $term->parent;
-        }
-    }
-
-
-    private function _set_empty_category_object()
-    {
-        $this->_category                = new stdClass();
-        $this->_category->category_name = $this->_category->category_identifier = $this->_category->category_desc = '';
-        $this->_category->id            = $this->_category->parent = 0;
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _category_list_table()
-    {
-        do_action('AHEE_log', __FILE__, __FUNCTION__, '');
-        $this->_admin_page_title .= ' ' . $this->get_action_link_or_button(
-            'add_category',
-            'add_category',
-            [],
-            'add-new-h2'
-        );
-        $this->_search_btn_label = esc_html__('Venue Categories', 'event_espresso');
-        $this->display_admin_list_table_page_with_sidebar();
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _category_details($view)
-    {
-
-        // load formatter helper
-        // load field generator helper
-
-        $route = $view == 'edit' ? 'update_category' : 'insert_category';
-        $this->_set_add_edit_form_tags($route);
-
-        $this->_set_category_object();
-        $id = ! empty($this->_category->id) ? $this->_category->id : '';
-
-        $delete_action = 'delete_category';
-
-        $redirect = EE_Admin_Page::add_query_args_and_nonce(['action' => 'category_list'], $this->_admin_base_url);
-
-        $this->_set_publish_post_box_vars('VEN_CAT_ID', $id, $delete_action, $redirect);
-
-        // take care of contents
-        $this->_template_args['admin_page_content'] = $this->_category_details_content();
-        $this->display_admin_page_with_sidebar();
-    }
-
-
-    protected function _category_details_content()
-    {
-        $editor_args['category_desc'] = [
-            'type'          => 'wp_editor',
-            'value'         => EEH_Formatter::admin_format_content($this->_category->category_desc),
-            'class'         => 'my_editor_custom',
-            'wpeditor_args' => ['media_buttons' => false],
-        ];
-        $_wp_editor                   = $this->_generate_admin_form_fields($editor_args, 'array');
-
-        $all_terms = get_terms(
-            ['espresso_venue_categories'],
-            ['hide_empty' => 0, 'exclude' => [$this->_category->id]]
-        );
-
-        // setup category select for term parents.
-        $category_select_values[] = [
-            'text' => esc_html__('No Parent', 'event_espresso'),
-            'id'   => 0,
-        ];
-        foreach ($all_terms as $term) {
-            $category_select_values[] = [
-                'text' => $term->name,
-                'id'   => $term->term_id,
-            ];
-        }
-
-        $category_select = EEH_Form_Fields::select_input(
-            'category_parent',
-            $category_select_values,
-            $this->_category->parent
-        );
-        $template_args   = [
-            'category'                 => $this->_category,
-            'category_select'          => $category_select,
-            'unique_id_info_help_link' => $this->_get_help_tab_link('unique_id_info'),
-            'category_desc_editor'     => $_wp_editor['category_desc']['field'],
-            'disable'                  => '',
-            'disabled_message'         => false,
-        ];
-        $template        = EVENTS_TEMPLATE_PATH . 'event_category_details.template.php';
-        return EEH_Template::display_template($template, $template_args, true);
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _delete_categories()
-    {
-        $category_ID  = $this->request->getRequestParam('category_id', 0, 'int');
-        $category_IDs = $this->request->getRequestParam('VEN_CAT_ID', [$category_ID], 'int', true);
-
-        foreach ($category_IDs as $cat_id) {
-            $this->_delete_category($cat_id);
-        }
-
-        // doesn't matter what page we're coming from... we're going to the same place after delete.
-        $query_args = [
-            'action' => 'category_list',
-        ];
-        $this->_redirect_after_action(0, '', '', $query_args);
-    }
-
-
-    protected function _delete_category($cat_id)
-    {
-        $cat_id = absint($cat_id);
-        wp_delete_term($cat_id, 'espresso_venue_categories');
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    protected function _insert_or_update_category($new_category)
-    {
-
-        $cat_id  = $new_category ? $this->_insert_category() : $this->_insert_category(true);
-        $success = 0; // we already have a success message so lets not send another.
-        if ($cat_id) {
-            $query_args = [
-                'action'     => 'edit_category',
-                'VEN_CAT_ID' => $cat_id,
-            ];
-        } else {
-            $query_args = ['action' => 'add_category'];
-        }
-        $this->_redirect_after_action($success, '', '', $query_args, true);
-    }
-
-
-    private function _insert_category($update = false)
-    {
-        $category_ID     = $update ? $this->request->getRequestParam('VEN_CAT_ID', '', 'int') : '';
-        $category_name   = $this->request->getRequestParam('category_name', '');
-        $category_desc   = $this->request->getRequestParam('category_desc', '', 'html');
-        $category_parent = $this->request->getRequestParam('category_parent', 0, 'int');
-
-        if (empty($category_name)) {
-            $msg = esc_html__('You must add a name for the category.', 'event_espresso');
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
-
-
-        $term_args = [
-            'name'        => $category_name,
-            'description' => $category_desc,
-            'parent'      => $category_parent,
-        ];
-
-        $insert_ids = $update
-            ? wp_update_term($category_ID, 'espresso_venue_categories', $term_args)
-            : wp_insert_term(
-                $category_name,
-                'espresso_venue_categories',
-                $term_args
-            );
-
-        if (! is_array($insert_ids)) {
-            EE_Error::add_error(
-                esc_html__('An error occurred and the category has not been saved to the database.', 'event_espresso'),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        } else {
-            $category_ID = $insert_ids['term_id'];
-            EE_Error::add_success(
-                sprintf(
-                    esc_html__('The category %s was successfully created', 'event_espresso'),
-                    $category_name
-                )
-            );
-        }
-
-        return $category_ID;
-    }
-
-
-    /**
-     * TODO handle category exports()
-     *
-     * @return void
-     */
-    protected function _categories_export()
-    {
-        // todo: I don't like doing this but it'll do until we modify EE_Export Class.
-        $this->request->mergeRequestParams(
-            [
-                'export'       => 'report',
-                'action'       => 'categories',
-                'category_ids' => $this->request->getRequestParam('VEN_CAT_ID', 0, 'int'),
-            ]
-        );
-
-        if (is_readable(EE_CLASSES . 'EE_Export.class.php')) {
-            require_once(EE_CLASSES . 'EE_Export.class.php');
-            $EE_Export = EE_Export::instance($this->request->requestParams());
-            $EE_Export->export();
-        }
-    }
-
-
-    protected function _import_categories()
-    {
-
-        require_once(EE_CLASSES . 'EE_Import.class.php');
-        EE_Import::instance()->import();
-    }
-
-
-    /**
-     * @throws EE_Error
-     */
-    public function get_categories($per_page = 10, $current_page = 1, $count = false)
-    {
-
-        // testing term stuff
-        $orderby     = $this->request->getRequestParam('orderby', 'Term.term_id');
-        $order       = $this->request->getRequestParam('order', 'DESC');
-        $limit       = ($current_page - 1) * $per_page;
-        $where       = ['taxonomy' => 'espresso_venue_categories'];
-        $search_term = $this->request->getRequestParam('s');
-        if ($search_term) {
-            $search_term = '%' . $search_term . '%';
-            $where['OR'] = [
-                'Term.name'   => ['LIKE', $search_term],
-                'description' => ['LIKE', $search_term],
-            ];
-        }
-
-        $query_params = [
-            $where,
-            'order_by'   => [$orderby => $order],
-            'limit'      => $limit . ',' . $per_page,
-            'force_join' => ['Term'],
-        ];
-
-        return $count
-            ? EEM_Term_Taxonomy::instance()->count($query_params, 'term_id')
-            : EEM_Term_Taxonomy::instance()->get_all($query_params);
-    }
-
-
-    /* end category stuff */
-    /**************/
+	protected function _google_map_settings()
+	{
+
+
+		$this->_template_args['values']           = $this->_yes_no_values;
+		$default_map_settings                     = new stdClass();
+		$default_map_settings->use_google_maps    = true;
+		$default_map_settings->google_map_api_key = '';
+		// for event details pages (reg page)
+		$default_map_settings->event_details_map_width    = 585;
+		// ee_map_width_single
+		$default_map_settings->event_details_map_height   = 362;
+		// ee_map_height_single
+		$default_map_settings->event_details_map_zoom     = 14;
+		// ee_map_zoom_single
+		$default_map_settings->event_details_display_nav  = true;
+		// ee_map_nav_display_single
+		$default_map_settings->event_details_nav_size     = false;
+		// ee_map_nav_size_single
+		$default_map_settings->event_details_control_type = 'default';
+		// ee_map_type_control_single
+		$default_map_settings->event_details_map_align    = 'center';
+		// ee_map_align_single
+
+		// for event list pages
+		$default_map_settings->event_list_map_width    = 300;
+		// ee_map_width
+		$default_map_settings->event_list_map_height   = 185;
+		// ee_map_height
+		$default_map_settings->event_list_map_zoom     = 12;
+		// ee_map_zoom
+		$default_map_settings->event_list_display_nav  = false;
+		// ee_map_nav_display
+		$default_map_settings->event_list_nav_size     = true;
+		// ee_map_nav_size
+		$default_map_settings->event_list_control_type = 'dropdown';
+		// ee_map_type_control
+		$default_map_settings->event_list_map_align    = 'center';
+		// ee_map_align
+
+		$this->_template_args['map_settings'] =
+			isset(EE_Registry::instance()->CFG->map_settings)
+			&& ! empty(EE_Registry::instance()->CFG->map_settings)
+				? (object) array_merge(
+					(array) $default_map_settings,
+					(array) EE_Registry::instance()->CFG->map_settings
+				)
+				: $default_map_settings;
+
+		$this->_set_add_edit_form_tags('update_google_map_settings');
+		$this->_set_publish_post_box_vars(null, false, false, null, false);
+		$this->_template_args['admin_page_content'] = EEH_Template::display_template(
+			EE_VENUES_TEMPLATE_PATH . 'google_map.template.php',
+			$this->_template_args,
+			true
+		);
+		$this->display_admin_page_with_sidebar();
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _update_google_map_settings()
+	{
+		$map_settings = EE_Registry::instance()->CFG->map_settings;
+
+		$settings = [
+			'use_google_maps'            => 'int',
+			'google_map_api_key'         => 'string',
+			'event_details_map_width'    => 'int',
+			'event_details_map_zoom'     => 'int',
+			'event_details_display_nav'  => 'int',
+			'event_details_nav_size'     => 'int',
+			'event_details_control_type' => 'string',
+			'event_details_map_align'    => 'string',
+			'event_list_map_width'       => 'int',
+			'event_list_map_height'      => 'int',
+			'event_list_map_zoom'        => 'int',
+			'event_list_display_nav'     => 'int',
+			'event_list_nav_size'        => 'int',
+			'event_list_control_type'    => 'string',
+			'event_list_map_align'       => 'string',
+		];
+
+		foreach ($settings as $setting => $type) {
+			$map_settings->{$setting} = $this->request->getRequestParam($setting, $map_settings->{$setting}, $type);
+		}
+
+		EE_Registry::instance()->CFG->map_settings = apply_filters(
+			'FHEE__Extend_General_Settings_Admin_Page___update_google_map_settings__CFG_map_settings',
+			$map_settings
+		);
+
+		$what    = 'Google Map Settings';
+		$success = $this->_update_espresso_configuration(
+			$what,
+			EE_Registry::instance()->CFG->map_settings,
+			__FILE__,
+			__FUNCTION__,
+			__LINE__
+		);
+		$this->_redirect_after_action($success, $what, 'updated', ['action' => 'google_map_settings']);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _venue_editor_metaboxes()
+	{
+		$this->verify_cpt_object();
+
+		add_meta_box(
+			'espresso_venue_address_options',
+			esc_html__('Physical Location', 'event_espresso'),
+			[$this, 'venue_address_metabox'],
+			$this->page_slug,
+			'side'
+		);
+		add_meta_box(
+			'espresso_venue_gmap_options',
+			esc_html__('Google Map', 'event_espresso'),
+			[$this, 'venue_gmap_metabox'],
+			$this->page_slug,
+			'side'
+		);
+		add_meta_box(
+			'espresso_venue_virtual_loc_options',
+			esc_html__('Virtual Location', 'event_espresso'),
+			[$this, 'venue_virtual_loc_metabox'],
+			$this->page_slug,
+			'side'
+		);
+	}
+
+
+	public function venue_gmap_metabox()
+	{
+		$template_args = [
+			'vnu_enable_for_gmap' => EEH_Form_Fields::select_input(
+				'vnu_enable_for_gmap',
+				$this->get_yes_no_values(),
+				$this->_cpt_model_obj instanceof EE_Venue ? $this->_cpt_model_obj->enable_for_gmap() : false
+			),
+			'vnu_google_map_link' => $this->_cpt_model_obj->google_map_link(),
+		];
+		$template      = EE_VENUES_TEMPLATE_PATH . 'venue_gmap_metabox_content.template.php';
+		EEH_Template::display_template($template, $template_args);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function venue_address_metabox()
+	{
+		$template_args['_venue'] = $this->_cpt_model_obj;
+
+		$template_args['states_dropdown']    = EEH_Form_Fields::generate_form_input(
+			new EE_Question_Form_Input(
+				EE_Question::new_instance(
+					['QST_display_text' => esc_html__('State', 'event_espresso'), 'QST_system' => 'state']
+				),
+				EE_Answer::new_instance(
+					[
+						'ANS_value' => $this->_cpt_model_obj instanceof EE_Venue
+							? $this->_cpt_model_obj->state_ID()
+							: 0,
+					]
+				),
+				[
+					'input_name'     => 'sta_id',
+					'input_id'       => 'sta_id',
+					'input_class'    => '',
+					'input_prefix'   => '',
+					'append_qstn_id' => false,
+				]
+			)
+		);
+		$template_args['countries_dropdown'] = EEH_Form_Fields::generate_form_input(
+			new EE_Question_Form_Input(
+				EE_Question::new_instance(
+					['QST_display_text' => esc_html__('Country', 'event_espresso'), 'QST_system' => 'country']
+				),
+				EE_Answer::new_instance(
+					[
+						'ANS_value' => $this->_cpt_model_obj instanceof EE_Venue
+							? $this->_cpt_model_obj->country_ID()
+							: 0,
+					]
+				),
+				[
+					'input_name'     => 'cnt_iso',
+					'input_id'       => 'cnt_iso',
+					'input_class'    => '',
+					'input_prefix'   => '',
+					'append_qstn_id' => false,
+				]
+			)
+		);
+
+		$template = EE_VENUES_TEMPLATE_PATH . 'venue_address_metabox_content.template.php';
+		EEH_Template::display_template($template, $template_args);
+	}
+
+
+	public function venue_virtual_loc_metabox()
+	{
+		$template_args = [
+			'_venue' => $this->_cpt_model_obj,
+		];
+		$template      = EE_VENUES_TEMPLATE_PATH . 'venue_virtual_location_metabox_content.template.php';
+		EEH_Template::display_template($template, $template_args);
+	}
+
+
+	protected function _restore_cpt_item($post_id, $revision_id)
+	{
+		$venue_obj = $this->_venue_model->get_one_by_ID($post_id);
+
+		// meta revision restore
+		$venue_obj->restore_revision($revision_id);
+	}
+
+
+	/**
+	 * Handles updates for venue cpts
+	 *
+	 * @param int    $post_id ID of Venue CPT
+	 * @param WP_Post $post    Post object (with "blessed" WP properties)
+	 * @return void
+	 */
+	protected function _insert_update_cpt_item($post_id, $post)
+	{
+
+		if ($post instanceof WP_Post && $post->post_type !== 'espresso_venues') {
+			return;// get out we're not processing the saving of venues.
+		}
+
+		$wheres = [$this->_venue_model->primary_key_name() => $post_id];
+
+		$venue_values = [
+			'VNU_address'         => $this->request->getRequestParam('vnu_address'),
+			'VNU_address2'        => $this->request->getRequestParam('vnu_address2'),
+			'VNU_city'            => $this->request->getRequestParam('vnu_city'),
+			'STA_ID'              => $this->request->getRequestParam('sta_id'),
+			'CNT_ISO'             => $this->request->getRequestParam('cnt_iso'),
+			'VNU_zip'             => $this->request->getRequestParam('vnu_zip'),
+			'VNU_phone'           => $this->request->getRequestParam('vnu_phone'),
+			'VNU_capacity'        => $this->request->requestParamIsSet('vnu_capacity')
+				? str_replace(',', '', $this->request->getRequestParam('vnu_capacity'))
+				: EE_INF,
+			'VNU_url'             => $this->request->getRequestParam('vnu_url'),
+			'VNU_virtual_phone'   => $this->request->getRequestParam('vnu_virtual_phone'),
+			'VNU_virtual_url'     => $this->request->getRequestParam('vnu_virtual_url'),
+			'VNU_enable_for_gmap' => $this->request->getRequestParam('vnu_enable_for_gmap', false, 'bool'),
+			'VNU_google_map_link' => $this->request->getRequestParam('vnu_google_map_link'),
+		];
+
+		// update venue
+		$success = $this->_venue_model->update($venue_values, [$wheres]);
+
+		// get venue_object for other metaboxes that might be added via the filter... though it would seem to make sense to just use $this->_venue_model->get_one_by_ID( $post_id ).. i have to setup where conditions to override the filters in the model that filter out autodraft and inherit statuses so we GET the inherit id!
+		$get_one_where = [$this->_venue_model->primary_key_name() => $post_id, 'status' => $post->post_status];
+		$venue         = $this->_venue_model->get_one([$get_one_where]);
+
+		// notice we've applied a filter for venue metabox callbacks but we don't actually have any default venue metaboxes in use.  So this is just here for addons to more easily hook into venue saves.
+		$venue_update_callbacks = apply_filters(
+			'FHEE__Venues_Admin_Page___insert_update_cpt_item__venue_update_callbacks',
+			[]
+		);
+		$att_success            = true;
+		foreach ($venue_update_callbacks as $v_callback) {
+			// if ANY of these updates fail then we want the appropriate global error message
+			$att_success = call_user_func_array($v_callback, [$venue, $this->request->requestParams()])
+				? $att_success
+				: false;
+		}
+
+		// any errors?
+		if ($success && ! $att_success) {
+			EE_Error::add_error(
+				esc_html__(
+					'Venue Details saved successfully but something went wrong with saving attachments.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		} elseif ($success === false) {
+			EE_Error::add_error(
+				esc_html__('Venue Details did not save successfully.', 'event_espresso'),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+	}
+
+
+	/**
+	 * @param int $post_id
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function trash_cpt_item($post_id)
+	{
+		$this->request->setRequestParam('VNU_ID', $post_id);
+		$this->_trash_or_restore_venue('trash', false);
+	}
+
+
+	/**
+	 * @param int $post_id
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function restore_cpt_item($post_id)
+	{
+		$this->request->setRequestParam('VNU_ID', $post_id);
+		$this->_trash_or_restore_venue('draft', false);
+	}
+
+
+	/**
+	 * @param int $post_id
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function delete_cpt_item($post_id)
+	{
+		$this->request->setRequestParam('VNU_ID', $post_id);
+		$this->_delete_venue(false);
+	}
+
+
+	public function get_venue_object()
+	{
+		return $this->_cpt_model_obj;
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _trash_or_restore_venue($venue_status = 'trash', $redirect_after = true)
+	{
+		$VNU_ID = $this->request->getRequestParam('VNU_ID', 0, 'int');
+		// loop thru venues
+		if ($VNU_ID) {
+			// clean status
+			$venue_status = sanitize_key($venue_status);
+			// grab status
+			if (! empty($venue_status)) {
+				$success = $this->_change_venue_status($VNU_ID, $venue_status);
+			} else {
+				$success = false;
+				$msg     = esc_html__(
+					'An error occurred. The venue could not be moved to the trash because a valid venue status was not not supplied.',
+					'event_espresso'
+				);
+				EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			}
+		} else {
+			$success = false;
+			$msg     = esc_html__(
+				'An error occurred. The venue could not be moved to the trash because a valid venue ID was not not supplied.',
+				'event_espresso'
+			);
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+		}
+		$action = $venue_status == 'trash' ? 'moved to the trash' : 'restored from the trash';
+
+		if ($redirect_after) {
+			$this->_redirect_after_action($success, 'Venue', $action, ['action' => 'default']);
+		}
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _trash_or_restore_venues($venue_status = 'trash')
+	{
+		// clean status
+		$venue_status = sanitize_key($venue_status);
+		// grab status
+		if (! empty($venue_status)) {
+			$success = true;
+			// determine the event id and set to array.
+			$VNU_IDs = $this->request->getRequestParam('venue_id', [], 'int', true);
+			// loop thru events
+			foreach ($VNU_IDs as $VNU_ID) {
+				if ($VNU_ID = absint($VNU_ID)) {
+					$results = $this->_change_venue_status($VNU_ID, $venue_status);
+					$success = $results !== false ? $success : false;
+				} else {
+					$msg = sprintf(
+						esc_html__(
+							'An error occurred. Venue #%d could not be moved to the trash because a valid venue ID was not not supplied.',
+							'event_espresso'
+						),
+						$VNU_ID
+					);
+					EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+					$success = false;
+				}
+			}
+		} else {
+			$success = false;
+			$msg     = esc_html__(
+				'An error occurred. The venue could not be moved to the trash because a valid venue status was not not supplied.',
+				'event_espresso'
+			);
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+		}
+		// in order to force a pluralized result message we need to send back a success status greater than 1
+		$success = $success ? 2 : false;
+		$action  = $venue_status == 'trash' ? 'moved to the trash' : 'restored from the trash';
+		$this->_redirect_after_action($success, 'Venues', $action, ['action' => 'default']);
+	}
+
+
+	/**
+	 * _trash_or_restore_venues
+	 *
+	 * //todo this is pretty much the same as the corresponding change_event_status method in Events_Admin_Page.  We
+	 * should probably abstract this up to the EE_Admin_Page_CPT (or even EE_Admin_Page) and make this a common method
+	 * accepting a certain number of params.
+	 *
+	 * @access  private
+	 * @param int    $VNU_ID
+	 * @param string $venue_status
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	private function _change_venue_status($VNU_ID = 0, $venue_status = '')
+	{
+		// grab venue id
+		if (! $VNU_ID) {
+			$msg = esc_html__('An error occurred. No Venue ID or an invalid Venue ID was received.', 'event_espresso');
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+
+		$this->_cpt_model_obj = EEM_Venue::instance()->get_one_by_ID($VNU_ID);
+
+		// clean status
+		$venue_status = sanitize_key($venue_status);
+		// grab status
+		if (! $venue_status) {
+			$msg = esc_html__(
+				'An error occurred. No Venue Status or an invalid Venue Status was received.',
+				'event_espresso'
+			);
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+
+		// was event trashed or restored ?
+		switch ($venue_status) {
+			case 'draft':
+				$action = 'restored from the trash';
+				$hook   = 'AHEE_venue_restored_from_trash';
+				break;
+			case 'trash':
+				$action = 'moved to the trash';
+				$hook   = 'AHEE_venue_moved_to_trash';
+				break;
+			default:
+				$action = 'updated';
+				$hook   = false;
+		}
+		// use class to change status
+		$this->_cpt_model_obj->set_status($venue_status);
+		$success = $this->_cpt_model_obj->save();
+
+		if ($success === false) {
+			$msg = sprintf(esc_html__('An error occurred. The venue could not be %s.', 'event_espresso'), $action);
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+		if ($hook) {
+			do_action($hook);
+		}
+		return true;
+	}
+
+
+	/**
+	 * @param bool $redirect_after
+	 * @return void
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _delete_venue($redirect_after = true)
+	{
+		// determine the venue id and set to array.
+		$VNU_ID = $this->request->getRequestParam('VNU_ID', 0, 'int');
+		$VNU_ID = $this->request->getRequestParam('post', $VNU_ID, 'int');
+
+		// loop thru venues
+		if ($VNU_ID) {
+			$success = $this->_delete_or_trash_venue($VNU_ID);
+		} else {
+			$success = false;
+			$msg     = esc_html__(
+				'An error occurred. An venue could not be deleted because a valid venue ID was not not supplied.',
+				'event_espresso'
+			);
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+		}
+		if ($redirect_after) {
+			$this->_redirect_after_action($success, 'Venue', 'deleted', ['action' => 'default']);
+		}
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _delete_venues()
+	{
+		$success = true;
+		// determine the event id and set to array.
+		$VNU_IDs = $this->request->getRequestParam('venue_id', [], 'int', true);
+		// loop thru events
+		foreach ($VNU_IDs as $VNU_ID) {
+			if ($VNU_ID = absint($VNU_ID)) {
+				$results = $this->_delete_or_trash_venue($VNU_ID);
+				$success = $results !== false ? $success : false;
+			} else {
+				$success = false;
+				$msg     = esc_html__(
+					'An error occurred. An venue could not be deleted because a valid venue ID was not not supplied.',
+					'event_espresso'
+				);
+				EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			}
+		}
+		// in order to force a pluralized result message we need to send back a success status greater than 1
+		$success = $success ? 2 : false;
+		$this->_redirect_after_action(
+			$success,
+			esc_html__('Venues', 'event_espresso'),
+			esc_html__('deleted', 'event_espresso'),
+			['action' => 'default']
+		);
+	}
+
+
+	// todo: put in parent
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	private function _delete_or_trash_venue($VNU_ID = false)
+	{
+		// grab event id
+		if (! $VNU_ID = absint($VNU_ID)) {
+			$msg = esc_html__('An error occurred. No Venue ID or an invalid Venue ID was received.', 'event_espresso');
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+
+
+		$venue = EEM_Venue::instance()->get_one_by_ID($VNU_ID);
+		// first need to remove all term relationships
+		$venue->_remove_relations('Term_Taxonomy');
+		$success = $venue->delete_permanently();
+		// did it all go as planned ?
+		if ($success) {
+			$msg = sprintf(esc_html__('Venue ID # %d has been deleted.', 'event_espresso'), $VNU_ID);
+			EE_Error::add_success($msg);
+		} else {
+			$msg =
+				sprintf(
+					esc_html__('An error occurred. Venue ID # %d could not be deleted.', 'event_espresso'),
+					$VNU_ID
+				);
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+		do_action('AHEE__Venues_Admin_Page___delete_or_trash_venue__after_venue_deleted');
+		return true;
+	}
+
+
+
+
+	/***********/
+	/* QUERIES */
+
+
+	public function get_venues($per_page = 10, $count = false)
+	{
+
+		$orderby = $this->request->getRequestParam('orderby', '');
+
+		switch ($orderby) {
+			case 'id':
+				$orderby = 'VNU_ID';
+				break;
+
+			case 'capacity':
+				$orderby = 'VNU_capacity';
+				break;
+
+			case 'city':
+				$orderby = 'VNU_city';
+				break;
+
+			default:
+				$orderby = 'VNU_name';
+		}
+
+		$sort         = $this->request->getRequestParam('order', 'ASC');
+		$current_page = $this->request->getRequestParam('paged', 1, 'int');
+		$per_page     = ! empty($per_page) ? $per_page : 10;
+		$per_page     = $this->request->getRequestParam('perpage', $per_page, 'int');
+
+		$offset = ($current_page - 1) * $per_page;
+		$limit  = [$offset, $per_page];
+
+		$category = $this->request->getRequestParam('category');
+		$category = $category > 0 ? $category : null;
+
+		$where = [];
+
+		// only set initial status if it is in the incoming request.  Otherwise the "all" view display's all statuses.
+		$status = $this->request->getRequestParam('status');
+		if ($status && $status !== 'all') {
+			$where['status'] = $status;
+		}
+
+		$venue_status = $this->request->getRequestParam('venue_status');
+		if ($venue_status) {
+			$where['status'] = $venue_status;
+		}
+
+
+		if ($category) {
+			$where['Term_Taxonomy.taxonomy'] = 'espresso_venue_categories';
+			$where['Term_Taxonomy.term_id']  = $category;
+		}
+
+
+		if (! EE_Registry::instance()->CAP->current_user_can('ee_read_others_venues', 'get_venues')) {
+			$where['VNU_wp_user'] = get_current_user_id();
+		} else {
+			if (! EE_Registry::instance()->CAP->current_user_can('ee_read_private_venues', 'get_venues')) {
+				$where['OR'] = [
+					'status*restrict_private' => ['!=', 'private'],
+					'AND'                     => [
+						'status*inclusive' => ['=', 'private'],
+						'VNU_wp_user'      => get_current_user_id(),
+					],
+				];
+			}
+		}
+
+		$search_term = $this->request->getRequestParam('s');
+		if ($search_term) {
+			$search_term = '%' . $search_term . '%';
+			$where['OR'] = [
+				'VNU_name'               => ['LIKE', $search_term],
+				'VNU_desc'               => ['LIKE', $search_term],
+				'VNU_short_desc'         => ['LIKE', $search_term],
+				'VNU_address'            => ['LIKE', $search_term],
+				'VNU_address2'           => ['LIKE', $search_term],
+				'VNU_city'               => ['LIKE', $search_term],
+				'VNU_zip'                => ['LIKE', $search_term],
+				'VNU_phone'              => ['LIKE', $search_term],
+				'VNU_url'                => ['LIKE', $search_term],
+				'VNU_virtual_phone'      => ['LIKE', $search_term],
+				'VNU_virtual_url'        => ['LIKE', $search_term],
+				'VNU_google_map_link'    => ['LIKE', $search_term],
+				'Event.EVT_name'         => ['LIKE', $search_term],
+				'Event.EVT_desc'         => ['LIKE', $search_term],
+				'Event.EVT_phone'        => ['LIKE', $search_term],
+				'Event.EVT_external_URL' => ['LIKE', $search_term],
+			];
+		}
+
+
+		return $count
+			? $this->_venue_model->count([$where], 'VNU_ID')
+			: $this->_venue_model->get_all(
+				[$where, 'limit' => $limit, 'order_by' => $orderby, 'order' => $sort]
+			);
+	}
+
+
+
+
+	/** Venue Category Stuff **/
+
+	/**
+	 * set the _category property with the category object for the loaded page.
+	 *
+	 * @access private
+	 * @return void
+	 */
+	private function _set_category_object()
+	{
+		if (isset($this->_category->id) && ! empty($this->_category->id)) {
+			return;
+		} // already have the category object so get out.
+
+		// set default category object
+		$this->_set_empty_category_object();
+
+		// only set if we've got an id
+		$category_ID = $this->request->getRequestParam('VEN_CAT_ID', 0, 'int');
+		if (! $category_ID) {
+			return;
+		}
+
+		$term = get_term($category_ID, 'espresso_venue_categories');
+
+
+		if (! empty($term)) {
+			$this->_category->category_name       = $term->name;
+			$this->_category->category_identifier = $term->slug;
+			$this->_category->category_desc       = $term->description;
+			$this->_category->id                  = $term->term_id;
+			$this->_category->parent              = $term->parent;
+		}
+	}
+
+
+	private function _set_empty_category_object()
+	{
+		$this->_category                = new stdClass();
+		$this->_category->category_name = $this->_category->category_identifier = $this->_category->category_desc = '';
+		$this->_category->id            = $this->_category->parent = 0;
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _category_list_table()
+	{
+		do_action('AHEE_log', __FILE__, __FUNCTION__, '');
+		$this->_admin_page_title .= ' ' . $this->get_action_link_or_button(
+			'add_category',
+			'add_category',
+			[],
+			'add-new-h2'
+		);
+		$this->_search_btn_label = esc_html__('Venue Categories', 'event_espresso');
+		$this->display_admin_list_table_page_with_sidebar();
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _category_details($view)
+	{
+
+		// load formatter helper
+		// load field generator helper
+
+		$route = $view == 'edit' ? 'update_category' : 'insert_category';
+		$this->_set_add_edit_form_tags($route);
+
+		$this->_set_category_object();
+		$id = ! empty($this->_category->id) ? $this->_category->id : '';
+
+		$delete_action = 'delete_category';
+
+		$redirect = EE_Admin_Page::add_query_args_and_nonce(['action' => 'category_list'], $this->_admin_base_url);
+
+		$this->_set_publish_post_box_vars('VEN_CAT_ID', $id, $delete_action, $redirect);
+
+		// take care of contents
+		$this->_template_args['admin_page_content'] = $this->_category_details_content();
+		$this->display_admin_page_with_sidebar();
+	}
+
+
+	protected function _category_details_content()
+	{
+		$editor_args['category_desc'] = [
+			'type'          => 'wp_editor',
+			'value'         => EEH_Formatter::admin_format_content($this->_category->category_desc),
+			'class'         => 'my_editor_custom',
+			'wpeditor_args' => ['media_buttons' => false],
+		];
+		$_wp_editor                   = $this->_generate_admin_form_fields($editor_args, 'array');
+
+		$all_terms = get_terms(
+			['espresso_venue_categories'],
+			['hide_empty' => 0, 'exclude' => [$this->_category->id]]
+		);
+
+		// setup category select for term parents.
+		$category_select_values[] = [
+			'text' => esc_html__('No Parent', 'event_espresso'),
+			'id'   => 0,
+		];
+		foreach ($all_terms as $term) {
+			$category_select_values[] = [
+				'text' => $term->name,
+				'id'   => $term->term_id,
+			];
+		}
+
+		$category_select = EEH_Form_Fields::select_input(
+			'category_parent',
+			$category_select_values,
+			$this->_category->parent
+		);
+		$template_args   = [
+			'category'                 => $this->_category,
+			'category_select'          => $category_select,
+			'unique_id_info_help_link' => $this->_get_help_tab_link('unique_id_info'),
+			'category_desc_editor'     => $_wp_editor['category_desc']['field'],
+			'disable'                  => '',
+			'disabled_message'         => false,
+		];
+		$template        = EVENTS_TEMPLATE_PATH . 'event_category_details.template.php';
+		return EEH_Template::display_template($template, $template_args, true);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _delete_categories()
+	{
+		$category_ID  = $this->request->getRequestParam('category_id', 0, 'int');
+		$category_IDs = $this->request->getRequestParam('VEN_CAT_ID', [$category_ID], 'int', true);
+
+		foreach ($category_IDs as $cat_id) {
+			$this->_delete_category($cat_id);
+		}
+
+		// doesn't matter what page we're coming from... we're going to the same place after delete.
+		$query_args = [
+			'action' => 'category_list',
+		];
+		$this->_redirect_after_action(0, '', '', $query_args);
+	}
+
+
+	protected function _delete_category($cat_id)
+	{
+		$cat_id = absint($cat_id);
+		wp_delete_term($cat_id, 'espresso_venue_categories');
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	protected function _insert_or_update_category($new_category)
+	{
+
+		$cat_id  = $new_category ? $this->_insert_category() : $this->_insert_category(true);
+		$success = 0; // we already have a success message so lets not send another.
+		if ($cat_id) {
+			$query_args = [
+				'action'     => 'edit_category',
+				'VEN_CAT_ID' => $cat_id,
+			];
+		} else {
+			$query_args = ['action' => 'add_category'];
+		}
+		$this->_redirect_after_action($success, '', '', $query_args, true);
+	}
+
+
+	private function _insert_category($update = false)
+	{
+		$category_ID     = $update ? $this->request->getRequestParam('VEN_CAT_ID', '', 'int') : '';
+		$category_name   = $this->request->getRequestParam('category_name', '');
+		$category_desc   = $this->request->getRequestParam('category_desc', '', 'html');
+		$category_parent = $this->request->getRequestParam('category_parent', 0, 'int');
+
+		if (empty($category_name)) {
+			$msg = esc_html__('You must add a name for the category.', 'event_espresso');
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
+
+
+		$term_args = [
+			'name'        => $category_name,
+			'description' => $category_desc,
+			'parent'      => $category_parent,
+		];
+
+		$insert_ids = $update
+			? wp_update_term($category_ID, 'espresso_venue_categories', $term_args)
+			: wp_insert_term(
+				$category_name,
+				'espresso_venue_categories',
+				$term_args
+			);
+
+		if (! is_array($insert_ids)) {
+			EE_Error::add_error(
+				esc_html__('An error occurred and the category has not been saved to the database.', 'event_espresso'),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		} else {
+			$category_ID = $insert_ids['term_id'];
+			EE_Error::add_success(
+				sprintf(
+					esc_html__('The category %s was successfully created', 'event_espresso'),
+					$category_name
+				)
+			);
+		}
+
+		return $category_ID;
+	}
+
+
+	/**
+	 * TODO handle category exports()
+	 *
+	 * @return void
+	 */
+	protected function _categories_export()
+	{
+		// todo: I don't like doing this but it'll do until we modify EE_Export Class.
+		$this->request->mergeRequestParams(
+			[
+				'export'       => 'report',
+				'action'       => 'categories',
+				'category_ids' => $this->request->getRequestParam('VEN_CAT_ID', 0, 'int'),
+			]
+		);
+
+		if (is_readable(EE_CLASSES . 'EE_Export.class.php')) {
+			require_once(EE_CLASSES . 'EE_Export.class.php');
+			$EE_Export = EE_Export::instance($this->request->requestParams());
+			$EE_Export->export();
+		}
+	}
+
+
+	protected function _import_categories()
+	{
+
+		require_once(EE_CLASSES . 'EE_Import.class.php');
+		EE_Import::instance()->import();
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 */
+	public function get_categories($per_page = 10, $current_page = 1, $count = false)
+	{
+
+		// testing term stuff
+		$orderby     = $this->request->getRequestParam('orderby', 'Term.term_id');
+		$order       = $this->request->getRequestParam('order', 'DESC');
+		$limit       = ($current_page - 1) * $per_page;
+		$where       = ['taxonomy' => 'espresso_venue_categories'];
+		$search_term = $this->request->getRequestParam('s');
+		if ($search_term) {
+			$search_term = '%' . $search_term . '%';
+			$where['OR'] = [
+				'Term.name'   => ['LIKE', $search_term],
+				'description' => ['LIKE', $search_term],
+			];
+		}
+
+		$query_params = [
+			$where,
+			'order_by'   => [$orderby => $order],
+			'limit'      => $limit . ',' . $per_page,
+			'force_join' => ['Term'],
+		];
+
+		return $count
+			? EEM_Term_Taxonomy::instance()->count($query_params, 'term_id')
+			: EEM_Term_Taxonomy::instance()->get_all($query_params);
+	}
+
+
+	/* end category stuff */
+	/**************/
 }

core/EE_System.core.php

Indentation +1358 added lines, -1358 removed lines

@@ -26,1362 +26,1362 @@
  */
 final class EE_System implements ResettableInterface
 {
-    /**
-     * indicates this is a 'normal' request. Ie, not activation, nor upgrade, nor activation.
-     * So examples of this would be a normal GET request on the frontend or backend, or a POST, etc
-     */
-    const req_type_normal = 0;
-
-    /**
-     * Indicates this is a brand new installation of EE so we should install
-     * tables and default data etc
-     */
-    const req_type_new_activation = 1;
-
-    /**
-     * we've detected that EE has been reactivated (or EE was activated during maintenance mode,
-     * and we just exited maintenance mode). We MUST check the database is setup properly
-     * and that default data is setup too
-     */
-    const req_type_reactivation = 2;
-
-    /**
-     * indicates that EE has been upgraded since its previous request.
-     * We may have data migration scripts to call and will want to trigger maintenance mode
-     */
-    const req_type_upgrade = 3;
-
-    /**
-     * TODO  will detect that EE has been DOWNGRADED. We probably don't want to run in this case...
-     */
-    const req_type_downgrade = 4;
-
-    /**
-     * @deprecated since version 4.6.0.dev.006
-     * Now whenever a new_activation is detected the request type is still just
-     * new_activation (same for reactivation, upgrade, downgrade etc), but if we'r ein maintenance mode
-     * EE_System::initialize_db_if_no_migrations_required and EE_Addon::initialize_db_if_no_migrations_required
-     * will instead enqueue that EE plugin's db initialization for when we're taken out of maintenance mode.
-     * (Specifically, when the migration manager indicates migrations are finished
-     * EE_Data_Migration_Manager::initialize_db_for_enqueued_ee_plugins() will be called)
-     */
-    const req_type_activation_but_not_installed = 5;
-
-    /**
-     * option prefix for recording the activation history (like core's "espresso_db_update") of addons
-     */
-    const addon_activation_history_option_prefix = 'ee_addon_activation_history_';
-
-    /**
-     * @var EE_System $_instance
-     */
-    private static $_instance;
-
-    /**
-     * @var EE_Registry $registry
-     */
-    private $registry;
-
-    /**
-     * @var LoaderInterface $loader
-     */
-    private $loader;
-
-    /**
-     * @var EE_Capabilities $capabilities
-     */
-    private $capabilities;
-
-    /**
-     * @var RequestInterface $request
-     */
-    private $request;
-
-    /**
-     * @var EE_Maintenance_Mode $maintenance_mode
-     */
-    private $maintenance_mode;
-
-    /**
-     * Stores which type of request this is, options being one of the constants on EE_System starting with req_type_*.
-     * It can be a brand-new activation, a reactivation, an upgrade, a downgrade, or a normal request.
-     *
-     * @var int $_req_type
-     */
-    private $_req_type;
-
-    /**
-     * Whether or not there was a non-micro version change in EE core version during this request
-     *
-     * @var boolean $_major_version_change
-     */
-    private $_major_version_change = false;
-
-    /**
-     * A Context DTO dedicated solely to identifying the current request type.
-     *
-     * @var RequestTypeContextCheckerInterface $request_type
-     */
-    private $request_type;
-
-    /**
-     * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes
-     */
-    private $register_custom_post_types;
-
-    /**
-     * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies
-     */
-    private $register_custom_taxonomies;
-
-    /**
-     * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms
-     */
-    private $register_custom_taxonomy_terms;
-
-    /**
-     * @singleton method used to instantiate class object
-     * @param EE_Registry|null         $registry
-     * @param LoaderInterface|null     $loader
-     * @param RequestInterface|null    $request
-     * @param EE_Maintenance_Mode|null $maintenance_mode
-     * @return EE_System
-     */
-    public static function instance(
-        EE_Registry $registry = null,
-        LoaderInterface $loader = null,
-        RequestInterface $request = null,
-        EE_Maintenance_Mode $maintenance_mode = null
-    ) {
-        // check if class object is instantiated
-        if (! self::$_instance instanceof EE_System) {
-            self::$_instance = new self($registry, $loader, $request, $maintenance_mode);
-        }
-        return self::$_instance;
-    }
-
-
-    /**
-     * resets the instance and returns it
-     *
-     * @return EE_System
-     */
-    public static function reset()
-    {
-        self::$_instance->_req_type = null;
-        // make sure none of the old hooks are left hanging around
-        remove_all_actions('AHEE__EE_System__perform_activations_upgrades_and_migrations');
-        // we need to reset the migration manager in order for it to detect DMSs properly
-        EE_Data_Migration_Manager::reset();
-        self::instance()->detect_activations_or_upgrades();
-        self::instance()->perform_activations_upgrades_and_migrations();
-        return self::instance();
-    }
-
-
-    /**
-     * sets hooks for running rest of system
-     * provides "AHEE__EE_System__construct__complete" hook for EE Addons to use as their starting point
-     * starting EE Addons from any other point may lead to problems
-     *
-     * @param EE_Registry         $registry
-     * @param LoaderInterface     $loader
-     * @param RequestInterface    $request
-     * @param EE_Maintenance_Mode $maintenance_mode
-     */
-    private function __construct(
-        EE_Registry $registry,
-        LoaderInterface $loader,
-        RequestInterface $request,
-        EE_Maintenance_Mode $maintenance_mode
-    ) {
-        $this->registry = $registry;
-        $this->loader = $loader;
-        $this->request = $request;
-        $this->maintenance_mode = $maintenance_mode;
-        do_action('AHEE__EE_System__construct__begin', $this);
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            array($this, 'loadCapabilities'),
-            5
-        );
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            array($this, 'loadCommandBus'),
-            7
-        );
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            array($this, 'loadPluginApi'),
-            9
-        );
-        // allow addons to load first so that they can register autoloaders, set hooks for running DMS's, etc
-        add_action(
-            'AHEE__EE_Bootstrap__load_espresso_addons',
-            array($this, 'load_espresso_addons')
-        );
-        // when an ee addon is activated, we want to call the core hook(s) again
-        // because the newly-activated addon didn't get a chance to run at all
-        add_action('activate_plugin', array($this, 'load_espresso_addons'), 1);
-        // detect whether install or upgrade
-        add_action(
-            'AHEE__EE_Bootstrap__detect_activations_or_upgrades',
-            array($this, 'detect_activations_or_upgrades'),
-            3
-        );
-        // load EE_Config, EE_Textdomain, etc
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            array($this, 'load_core_configuration'),
-            5
-        );
-        // load specifications for matching routes to current request
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            array($this, 'loadRouteMatchSpecifications')
-        );
-        // load specifications for custom post types
-        add_action(
-            'AHEE__EE_Bootstrap__load_core_configuration',
-            array($this, 'loadCustomPostTypes')
-        );
-        // load EE_Config, EE_Textdomain, etc
-        add_action(
-            'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets',
-            array($this, 'register_shortcodes_modules_and_widgets'),
-            7
-        );
-        // you wanna get going? I wanna get going... let's get going!
-        add_action(
-            'AHEE__EE_Bootstrap__brew_espresso',
-            array($this, 'brew_espresso'),
-            9
-        );
-        // other housekeeping
-        // exclude EE critical pages from wp_list_pages
-        add_filter(
-            'wp_list_pages_excludes',
-            array($this, 'remove_pages_from_wp_list_pages'),
-            10
-        );
-        // ALL EE Addons should use the following hook point to attach their initial setup too
-        // it's extremely important for EE Addons to register any class autoloaders so that they can be available when the EE_Config loads
-        do_action('AHEE__EE_System__construct__complete', $this);
-    }
-
-
-    /**
-     * load and setup EE_Capabilities
-     *
-     * @return void
-     * @throws EE_Error
-     */
-    public function loadCapabilities()
-    {
-        $this->capabilities = $this->loader->getShared('EE_Capabilities');
-        add_action(
-            'AHEE__EE_Capabilities__init_caps__before_initialization',
-            function () {
-                LoaderFactory::getLoader()->getShared('EE_Payment_Method_Manager');
-            }
-        );
-    }
-
-
-    /**
-     * create and cache the CommandBus, and also add middleware
-     * The CapChecker middleware requires the use of EE_Capabilities
-     * which is why we need to load the CommandBus after Caps are set up
-     * CommandBus middleware operate FIFO - First In First Out
-     * so LocateMovedCommands will run first in order to return any new commands
-     *
-     * @return void
-     * @throws EE_Error
-     */
-    public function loadCommandBus()
-    {
-        $this->loader->getShared(
-            'CommandBusInterface',
-            array(
-                null,
-                apply_filters(
-                    'FHEE__EE_Load_Espresso_Core__handle_request__CommandBus_middleware',
-                    array(
-                        $this->loader->getShared('EventEspresso\core\services\commands\middleware\LocateMovedCommands'),
-                        $this->loader->getShared('EventEspresso\core\services\commands\middleware\CapChecker'),
-                        $this->loader->getShared('EventEspresso\core\services\commands\middleware\AddActionHook'),
-                    )
-                ),
-            )
-        );
-    }
-
-
-    /**
-     * @return void
-     * @throws EE_Error
-     */
-    public function loadPluginApi()
-    {
-        // set autoloaders for all of the classes implementing EEI_Plugin_API
-        // which provide helpers for EE plugin authors to more easily register certain components with EE.
-        EEH_Autoloader::instance()->register_autoloaders_for_each_file_in_folder(EE_LIBRARIES . 'plugin_api');
-    }
-
-
-    /**
-     * @param string $addon_name
-     * @param string $version_constant
-     * @param string $min_version_required
-     * @param string $load_callback
-     * @param string $plugin_file_constant
-     * @return void
-     */
-    private function deactivateIncompatibleAddon(
-        $addon_name,
-        $version_constant,
-        $min_version_required,
-        $load_callback,
-        $plugin_file_constant
-    ) {
-        if (! defined($version_constant)) {
-            return;
-        }
-        $addon_version = constant($version_constant);
-        if ($addon_version && version_compare($addon_version, $min_version_required, '<')) {
-            remove_action('AHEE__EE_System__load_espresso_addons', $load_callback);
-            if (! function_exists('deactivate_plugins')) {
-                require_once ABSPATH . 'wp-admin/includes/plugin.php';
-            }
-            deactivate_plugins(plugin_basename(constant($plugin_file_constant)));
-            $this->request->unSetRequestParams(['activate', 'activate-multi'], true);
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__(
-                        'We\'re sorry, but the Event Espresso %1$s addon was deactivated because version %2$s or higher is required with this version of Event Espresso core.',
-                        'event_espresso'
-                    ),
-                    $addon_name,
-                    $min_version_required
-                ),
-                __FILE__,
-                __FUNCTION__ . "({$addon_name})",
-                __LINE__
-            );
-            EE_Error::get_notices(false, true);
-        }
-    }
-
-
-    /**
-     * load_espresso_addons
-     * allow addons to load first so that they can set hooks for running DMS's, etc
-     * this is hooked into both:
-     *    'AHEE__EE_Bootstrap__load_core_configuration'
-     *        which runs during the WP 'plugins_loaded' action at priority 5
-     *    and the WP 'activate_plugin' hook point
-     *
-     * @access public
-     * @return void
-     */
-    public function load_espresso_addons()
-    {
-        $this->deactivateIncompatibleAddon(
-            'Wait Lists',
-            'EE_WAIT_LISTS_VERSION',
-            '1.0.0.beta.074',
-            'load_espresso_wait_lists',
-            'EE_WAIT_LISTS_PLUGIN_FILE'
-        );
-        $this->deactivateIncompatibleAddon(
-            'Automated Upcoming Event Notifications',
-            'EE_AUTOMATED_UPCOMING_EVENT_NOTIFICATION_VERSION',
-            '1.0.0.beta.091',
-            'load_espresso_automated_upcoming_event_notification',
-            'EE_AUTOMATED_UPCOMING_EVENT_NOTIFICATION_PLUGIN_FILE'
-        );
-        do_action('AHEE__EE_System__load_espresso_addons');
-        // if the WP API basic auth plugin isn't already loaded, load it now.
-        // We want it for mobile apps. Just include the entire plugin
-        // also, don't load the basic auth when a plugin is getting activated, because
-        // it could be the basic auth plugin, and it doesn't check if its methods are already defined
-        // and causes a fatal error
-        if (
-            ($this->request->isWordPressApi() || $this->request->isApi())
-            && $this->request->getRequestParam('activate') !== 'true'
-            && ! function_exists('json_basic_auth_handler')
-            && ! function_exists('json_basic_auth_error')
-            && ! in_array(
-                $this->request->getRequestParam('action'),
-                array('activate', 'activate-selected'),
-                true
-            )
-        ) {
-            include_once EE_THIRD_PARTY . 'wp-api-basic-auth/basic-auth.php';
-        }
-        do_action('AHEE__EE_System__load_espresso_addons__complete');
-    }
-
-
-    /**
-     * detect_activations_or_upgrades
-     * Checks for activation or upgrade of core first;
-     * then also checks if any registered addons have been activated or upgraded
-     * This is hooked into 'AHEE__EE_Bootstrap__detect_activations_or_upgrades'
-     * which runs during the WP 'plugins_loaded' action at priority 3
-     *
-     * @access public
-     * @return void
-     */
-    public function detect_activations_or_upgrades()
-    {
-        // first off: let's make sure to handle core
-        $this->detect_if_activation_or_upgrade();
-        foreach ($this->registry->addons as $addon) {
-            if ($addon instanceof EE_Addon) {
-                // detect teh request type for that addon
-                $addon->detect_req_type();
-            }
-        }
-    }
-
-
-    /**
-     * detect_if_activation_or_upgrade
-     * Takes care of detecting whether this is a brand new install or code upgrade,
-     * and either setting up the DB or setting up maintenance mode etc.
-     *
-     * @access public
-     * @return void
-     */
-    public function detect_if_activation_or_upgrade()
-    {
-        do_action('AHEE__EE_System___detect_if_activation_or_upgrade__begin');
-        // check if db has been updated, or if its a brand-new installation
-        $espresso_db_update = $this->fix_espresso_db_upgrade_option();
-        $request_type = $this->detect_req_type($espresso_db_update);
-        // EEH_Debug_Tools::printr( $request_type, '$request_type', __FILE__, __LINE__ );
-        switch ($request_type) {
-            case EE_System::req_type_new_activation:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__new_activation');
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_reactivation:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__reactivation');
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_upgrade:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__upgrade');
-                // migrations may be required now that we've upgraded
-                $this->maintenance_mode->set_maintenance_mode_if_db_old();
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_downgrade:
-                do_action('AHEE__EE_System__detect_if_activation_or_upgrade__downgrade');
-                // its possible migrations are no longer required
-                $this->maintenance_mode->set_maintenance_mode_if_db_old();
-                $this->_handle_core_version_change($espresso_db_update);
-                break;
-            case EE_System::req_type_normal:
-            default:
-                break;
-        }
-        do_action('AHEE__EE_System__detect_if_activation_or_upgrade__complete');
-    }
-
-
-    /**
-     * Updates the list of installed versions and sets hooks for
-     * initializing the database later during the request
-     *
-     * @param array $espresso_db_update
-     */
-    private function _handle_core_version_change($espresso_db_update)
-    {
-        $this->update_list_of_installed_versions($espresso_db_update);
-        // get ready to verify the DB is ok (provided we aren't in maintenance mode, of course)
-        add_action(
-            'AHEE__EE_System__perform_activations_upgrades_and_migrations',
-            array($this, 'initialize_db_if_no_migrations_required')
-        );
-    }
-
-
-    /**
-     * standardizes the wp option 'espresso_db_upgrade' which actually stores
-     * information about what versions of EE have been installed and activated,
-     * NOT necessarily the state of the database
-     *
-     * @param mixed $espresso_db_update           the value of the WordPress option.
-     *                                            If not supplied, fetches it from the options table
-     * @return array the correct value of 'espresso_db_upgrade', after saving it, if it needed correction
-     */
-    private function fix_espresso_db_upgrade_option($espresso_db_update = null)
-    {
-        do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__begin', $espresso_db_update);
-        if (! $espresso_db_update) {
-            $espresso_db_update = get_option('espresso_db_update');
-        }
-        // check that option is an array
-        if (! is_array($espresso_db_update)) {
-            // if option is FALSE, then it never existed
-            if ($espresso_db_update === false) {
-                // make $espresso_db_update an array and save option with autoload OFF
-                $espresso_db_update = array();
-                add_option('espresso_db_update', $espresso_db_update, '', 'no');
-            } else {
-                // option is NOT FALSE but also is NOT an array, so make it an array and save it
-                $espresso_db_update = array($espresso_db_update => array());
-                update_option('espresso_db_update', $espresso_db_update);
-            }
-        } else {
-            $corrected_db_update = array();
-            // if IS an array, but is it an array where KEYS are version numbers, and values are arrays?
-            foreach ($espresso_db_update as $should_be_version_string => $should_be_array) {
-                if (is_int($should_be_version_string) && ! is_array($should_be_array)) {
-                    // the key is an int, and the value IS NOT an array
-                    // so it must be numerically-indexed, where values are versions installed...
-                    // fix it!
-                    $version_string = $should_be_array;
-                    $corrected_db_update[ $version_string ] = array('unknown-date');
-                } else {
-                    // ok it checks out
-                    $corrected_db_update[ $should_be_version_string ] = $should_be_array;
-                }
-            }
-            $espresso_db_update = $corrected_db_update;
-            update_option('espresso_db_update', $espresso_db_update);
-        }
-        do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__complete', $espresso_db_update);
-        return $espresso_db_update;
-    }
-
-
-    /**
-     * Does the traditional work of setting up the plugin's database and adding default data.
-     * If migration script/process did not exist, this is what would happen on every activation/reactivation/upgrade.
-     * NOTE: if we're in maintenance mode (which would be the case if we detect there are data
-     * migration scripts that need to be run and a version change happens), enqueues core for database initialization,
-     * so that it will be done when migrations are finished
-     *
-     * @param boolean $initialize_addons_too if true, we double-check addons' database tables etc too;
-     * @param boolean $verify_schema         if true will re-check the database tables have the correct schema.
-     *                                       This is a resource-intensive job
-     *                                       so we prefer to only do it when necessary
-     * @return void
-     * @throws EE_Error
-     */
-    public function initialize_db_if_no_migrations_required($initialize_addons_too = false, $verify_schema = true)
-    {
-        $request_type = $this->detect_req_type();
-        // only initialize system if we're not in maintenance mode.
-        if ($this->maintenance_mode->level() !== EE_Maintenance_Mode::level_2_complete_maintenance) {
-            /** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
-            $rewrite_rules = $this->loader->getShared(
-                'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
-            );
-            $rewrite_rules->flush();
-            if ($verify_schema) {
-                EEH_Activation::initialize_db_and_folders();
-            }
-            EEH_Activation::initialize_db_content();
-            EEH_Activation::system_initialization();
-            if ($initialize_addons_too) {
-                $this->initialize_addons();
-            }
-        } else {
-            EE_Data_Migration_Manager::instance()->enqueue_db_initialization_for('Core');
-        }
-        if (
-            $request_type === EE_System::req_type_new_activation
-            || $request_type === EE_System::req_type_reactivation
-            || (
-                $request_type === EE_System::req_type_upgrade
-                && $this->is_major_version_change()
-            )
-        ) {
-            add_action('AHEE__EE_System__initialize_last', array($this, 'redirect_to_about_ee'), 9);
-        }
-    }
-
-
-    /**
-     * Initializes the db for all registered addons
-     *
-     * @throws EE_Error
-     */
-    public function initialize_addons()
-    {
-        // foreach registered addon, make sure its db is up-to-date too
-        foreach ($this->registry->addons as $addon) {
-            if ($addon instanceof EE_Addon) {
-                $addon->initialize_db_if_no_migrations_required();
-            }
-        }
-    }
-
-
-    /**
-     * Adds the current code version to the saved wp option which stores a list of all ee versions ever installed.
-     *
-     * @param    array  $version_history
-     * @param    string $current_version_to_add version to be added to the version history
-     * @return    boolean success as to whether or not this option was changed
-     */
-    public function update_list_of_installed_versions($version_history = null, $current_version_to_add = null)
-    {
-        if (! $version_history) {
-            $version_history = $this->fix_espresso_db_upgrade_option($version_history);
-        }
-        if ($current_version_to_add === null) {
-            $current_version_to_add = espresso_version();
-        }
-        $version_history[ $current_version_to_add ][] = date('Y-m-d H:i:s', time());
-        // re-save
-        return update_option('espresso_db_update', $version_history);
-    }
-
-
-    /**
-     * Detects if the current version indicated in the has existed in the list of
-     * previously-installed versions of EE (espresso_db_update). Does NOT modify it (ie, no side-effect)
-     *
-     * @param array $espresso_db_update array from the wp option stored under the name 'espresso_db_update'.
-     *                                  If not supplied, fetches it from the options table.
-     *                                  Also, caches its result so later parts of the code can also know whether
-     *                                  there's been an update or not. This way we can add the current version to
-     *                                  espresso_db_update, but still know if this is a new install or not
-     * @return int one of the constants on EE_System::req_type_
-     */
-    public function detect_req_type($espresso_db_update = null)
-    {
-        if ($this->_req_type === null) {
-            $espresso_db_update = ! empty($espresso_db_update)
-                ? $espresso_db_update
-                : $this->fix_espresso_db_upgrade_option();
-            $this->_req_type = EE_System::detect_req_type_given_activation_history(
-                $espresso_db_update,
-                'ee_espresso_activation',
-                espresso_version()
-            );
-            $this->_major_version_change = $this->_detect_major_version_change($espresso_db_update);
-            $this->request->setIsActivation($this->_req_type !== EE_System::req_type_normal);
-        }
-        return $this->_req_type;
-    }
-
-
-    /**
-     * Returns whether or not there was a non-micro version change (ie, change in either
-     * the first or second number in the version. Eg 4.9.0.rc.001 to 4.10.0.rc.000,
-     * but not 4.9.0.rc.0001 to 4.9.1.rc.0001
-     *
-     * @param $activation_history
-     * @return bool
-     */
-    private function _detect_major_version_change($activation_history)
-    {
-        $previous_version = EE_System::_get_most_recently_active_version_from_activation_history($activation_history);
-        $previous_version_parts = explode('.', $previous_version);
-        $current_version_parts = explode('.', espresso_version());
-        return isset($previous_version_parts[0], $previous_version_parts[1], $current_version_parts[0], $current_version_parts[1])
-               && ($previous_version_parts[0] !== $current_version_parts[0]
-                   || $previous_version_parts[1] !== $current_version_parts[1]
-               );
-    }
-
-
-    /**
-     * Returns true if either the major or minor version of EE changed during this request.
-     * Eg 4.9.0.rc.001 to 4.10.0.rc.000, but not 4.9.0.rc.0001 to 4.9.1.rc.0001
-     *
-     * @return bool
-     */
-    public function is_major_version_change()
-    {
-        return $this->_major_version_change;
-    }
-
-
-    /**
-     * Determines the request type for any ee addon, given three piece of info: the current array of activation
-     * histories (for core that' 'espresso_db_update' wp option); the name of the WordPress option which is temporarily
-     * set upon activation of the plugin (for core it's 'ee_espresso_activation'); and the version that this plugin was
-     * just activated to (for core that will always be espresso_version())
-     *
-     * @param array  $activation_history_for_addon     the option's value which stores the activation history for this
-     *                                                 ee plugin. for core that's 'espresso_db_update'
-     * @param string $activation_indicator_option_name the name of the WordPress option that is temporarily set to
-     *                                                 indicate that this plugin was just activated
-     * @param string $version_to_upgrade_to            the version that was just upgraded to (for core that will be
-     *                                                 espresso_version())
-     * @return int one of the constants on EE_System::req_type_*
-     */
-    public static function detect_req_type_given_activation_history(
-        $activation_history_for_addon,
-        $activation_indicator_option_name,
-        $version_to_upgrade_to
-    ) {
-        $version_is_higher = self::_new_version_is_higher($activation_history_for_addon, $version_to_upgrade_to);
-        if ($activation_history_for_addon) {
-            // it exists, so this isn't a completely new install
-            // check if this version already in that list of previously installed versions
-            if (! isset($activation_history_for_addon[ $version_to_upgrade_to ])) {
-                // it a version we haven't seen before
-                if ($version_is_higher === 1) {
-                    $req_type = EE_System::req_type_upgrade;
-                } else {
-                    $req_type = EE_System::req_type_downgrade;
-                }
-                delete_option($activation_indicator_option_name);
-            } else {
-                // its not an update. maybe a reactivation?
-                if (get_option($activation_indicator_option_name, false)) {
-                    if ($version_is_higher === -1) {
-                        $req_type = EE_System::req_type_downgrade;
-                    } elseif ($version_is_higher === 0) {
-                        // we've seen this version before, but it's an activation. must be a reactivation
-                        $req_type = EE_System::req_type_reactivation;
-                    } else {// $version_is_higher === 1
-                        $req_type = EE_System::req_type_upgrade;
-                    }
-                    delete_option($activation_indicator_option_name);
-                } else {
-                    // we've seen this version before and the activation indicate doesn't show it was just activated
-                    if ($version_is_higher === -1) {
-                        $req_type = EE_System::req_type_downgrade;
-                    } elseif ($version_is_higher === 0) {
-                        // we've seen this version before and it's not an activation. its normal request
-                        $req_type = EE_System::req_type_normal;
-                    } else {// $version_is_higher === 1
-                        $req_type = EE_System::req_type_upgrade;
-                    }
-                }
-            }
-        } else {
-            // brand new install
-            $req_type = EE_System::req_type_new_activation;
-            delete_option($activation_indicator_option_name);
-        }
-        return $req_type;
-    }
-
-
-    /**
-     * Detects if the $version_to_upgrade_to is higher than the most recent version in
-     * the $activation_history_for_addon
-     *
-     * @param array  $activation_history_for_addon (keys are versions, values are arrays of times activated,
-     *                                             sometimes containing 'unknown-date'
-     * @param string $version_to_upgrade_to        (current version)
-     * @return int results of version_compare( $version_to_upgrade_to, $most_recently_active_version ).
-     *                                             ie, -1 if $version_to_upgrade_to is LOWER (downgrade);
-     *                                             0 if $version_to_upgrade_to MATCHES (reactivation or normal request);
-     *                                             1 if $version_to_upgrade_to is HIGHER (upgrade) ;
-     */
-    private static function _new_version_is_higher($activation_history_for_addon, $version_to_upgrade_to)
-    {
-        // find the most recently-activated version
-        $most_recently_active_version =
-            EE_System::_get_most_recently_active_version_from_activation_history($activation_history_for_addon);
-        return version_compare($version_to_upgrade_to, $most_recently_active_version);
-    }
-
-
-    /**
-     * Gets the most recently active version listed in the activation history,
-     * and if none are found (ie, it's a brand new install) returns '0.0.0.dev.000'.
-     *
-     * @param array $activation_history  (keys are versions, values are arrays of times activated,
-     *                                   sometimes containing 'unknown-date'
-     * @return string
-     */
-    private static function _get_most_recently_active_version_from_activation_history($activation_history)
-    {
-        $most_recently_active_version_activation = '1970-01-01 00:00:00';
-        $most_recently_active_version = '0.0.0.dev.000';
-        if (is_array($activation_history)) {
-            foreach ($activation_history as $version => $times_activated) {
-                // check there is a record of when this version was activated. Otherwise,
-                // mark it as unknown
-                if (! $times_activated) {
-                    $times_activated = array('unknown-date');
-                }
-                if (is_string($times_activated)) {
-                    $times_activated = array($times_activated);
-                }
-                foreach ($times_activated as $an_activation) {
-                    if (
-                        $an_activation !== 'unknown-date'
-                        && $an_activation
-                           > $most_recently_active_version_activation
-                    ) {
-                        $most_recently_active_version = $version;
-                        $most_recently_active_version_activation = $an_activation === 'unknown-date'
-                            ? '1970-01-01 00:00:00'
-                            : $an_activation;
-                    }
-                }
-            }
-        }
-        return $most_recently_active_version;
-    }
-
-
-    /**
-     * This redirects to the about EE page after activation
-     *
-     * @return void
-     */
-    public function redirect_to_about_ee()
-    {
-        $notices = EE_Error::get_notices(false);
-        // if current user is an admin and it's not an ajax or rest request
-        if (
-            ! isset($notices['errors'])
-            && $this->request->isAdmin()
-            && apply_filters(
-                'FHEE__EE_System__redirect_to_about_ee__do_redirect',
-                $this->capabilities->current_user_can('manage_options', 'espresso_about_default')
-            )
-        ) {
-            $query_params = array('page' => 'espresso_about');
-            if (EE_System::instance()->detect_req_type() === EE_System::req_type_new_activation) {
-                $query_params['new_activation'] = true;
-            }
-            if (EE_System::instance()->detect_req_type() === EE_System::req_type_reactivation) {
-                $query_params['reactivation'] = true;
-            }
-            $url = add_query_arg($query_params, admin_url('admin.php'));
-            wp_safe_redirect($url);
-            exit();
-        }
-    }
-
-
-    /**
-     * load_core_configuration
-     * this is hooked into 'AHEE__EE_Bootstrap__load_core_configuration'
-     * which runs during the WP 'plugins_loaded' action at priority 5
-     *
-     * @return void
-     * @throws ReflectionException
-     * @throws Exception
-     */
-    public function load_core_configuration()
-    {
-        do_action('AHEE__EE_System__load_core_configuration__begin', $this);
-        $this->loader->getShared('EE_Load_Textdomain');
-        // load textdomain
-        EE_Load_Textdomain::load_textdomain();
-        // load caf stuff a chance to play during the activation process too.
-        $this->_maybe_brew_regular();
-        // load and setup EE_Config and EE_Network_Config
-        $config = $this->loader->getShared('EE_Config');
-        $this->loader->getShared('EE_Network_Config');
-        // setup autoloaders
-        // enable logging?
-        $this->loader->getShared('EventEspresso\core\services\orm\TrashLogger');
-        if ($config->admin->use_remote_logging) {
-            $this->loader->getShared('EE_Log');
-        }
-        // check for activation errors
-        $activation_errors = get_option('ee_plugin_activation_errors', false);
-        if ($activation_errors) {
-            EE_Error::add_error($activation_errors, __FILE__, __FUNCTION__, __LINE__);
-            update_option('ee_plugin_activation_errors', false);
-        }
-        // get model names
-        $this->_parse_model_names();
-        // configure custom post type definitions
-        $this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions');
-        $this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions');
-        do_action('AHEE__EE_System__load_core_configuration__complete', $this);
-    }
-
-
-    /**
-     * cycles through all of the models/*.model.php files, and assembles an array of model names
-     *
-     * @return void
-     * @throws ReflectionException
-     */
-    private function _parse_model_names()
-    {
-        // get all the files in the EE_MODELS folder that end in .model.php
-        $models = glob(EE_MODELS . '*.model.php');
-        $model_names = array();
-        $non_abstract_db_models = array();
-        foreach ($models as $model) {
-            // get model classname
-            $classname = EEH_File::get_classname_from_filepath_with_standard_filename($model);
-            $short_name = str_replace('EEM_', '', $classname);
-            $reflectionClass = new ReflectionClass($classname);
-            if ($reflectionClass->isSubclassOf('EEM_Base') && ! $reflectionClass->isAbstract()) {
-                $non_abstract_db_models[ $short_name ] = $classname;
-            }
-            $model_names[ $short_name ] = $classname;
-        }
-        $this->registry->models = apply_filters('FHEE__EE_System__parse_model_names', $model_names);
-        $this->registry->non_abstract_db_models = apply_filters(
-            'FHEE__EE_System__parse_implemented_model_names',
-            $non_abstract_db_models
-        );
-    }
-
-
-    /**
-     * The purpose of this method is to simply check for a file named "caffeinated/brewing_regular.php" for any hooks
-     * that need to be setup before our EE_System launches.
-     *
-     * @return void
-     * @throws DomainException
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws InvalidClassException
-     * @throws InvalidFilePathException
-     */
-    private function _maybe_brew_regular()
-    {
-        /** @var Domain $domain */
-        $domain = DomainFactory::getShared(
-            new FullyQualifiedName(
-                'EventEspresso\core\domain\Domain'
-            ),
-            array(
-                new FilePath(EVENT_ESPRESSO_MAIN_FILE),
-                Version::fromString(espresso_version()),
-            )
-        );
-        if ($domain->isCaffeinated()) {
-            require_once EE_CAFF_PATH . 'brewing_regular.php';
-        }
-    }
-
-
-    /**
-     * @since 4.9.71.p
-     * @throws Exception
-     */
-    public function loadRouteMatchSpecifications()
-    {
-        try {
-            $this->loader->getShared(
-                'EventEspresso\core\services\route_match\RouteMatchSpecificationManager'
-            );
-        } catch (Exception $exception) {
-            new ExceptionStackTraceDisplay($exception);
-        }
-        do_action('AHEE__EE_System__loadRouteMatchSpecifications');
-    }
-
-
-    /**
-     * loading CPT related classes earlier so that their definitions are available
-     * but not performing any actual registration with WP core until load_CPTs_and_session() is called
-     *
-     * @since   4.10.21.p
-     */
-    public function loadCustomPostTypes()
-    {
-        $this->register_custom_taxonomies = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies'
-        );
-        $this->register_custom_post_types = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes'
-        );
-        $this->register_custom_taxonomy_terms = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms'
-        );
-        // integrate WP_Query with the EE models
-        $this->loader->getShared('EE_CPT_Strategy');
-        // load legacy EE_Request_Handler in case add-ons still need it
-        $this->loader->getShared('EE_Request_Handler');
-    }
-
-
-    /**
-     * register_shortcodes_modules_and_widgets
-     * generate lists of shortcodes and modules, then verify paths and classes
-     * This is hooked into 'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets'
-     * which runs during the WP 'plugins_loaded' action at priority 7
-     *
-     * @access public
-     * @return void
-     * @throws Exception
-     */
-    public function register_shortcodes_modules_and_widgets()
-    {
-        if ($this->request->isFrontend() || $this->request->isIframe() || $this->request->isAjax()) {
-            // load, register, and add shortcodes the new way
-            $this->loader->getShared('EventEspresso\core\services\shortcodes\ShortcodesManager');
-        }
-        do_action('AHEE__EE_System__register_shortcodes_modules_and_widgets');
-        // check for addons using old hook point
-        if (has_action('AHEE__EE_System__register_shortcodes_modules_and_addons')) {
-            $this->_incompatible_addon_error();
-        }
-    }
-
-
-    /**
-     * _incompatible_addon_error
-     *
-     * @access public
-     * @return void
-     */
-    private function _incompatible_addon_error()
-    {
-        // get array of classes hooking into here
-        $class_names = EEH_Class_Tools::get_class_names_for_all_callbacks_on_hook(
-            'AHEE__EE_System__register_shortcodes_modules_and_addons'
-        );
-        if (! empty($class_names)) {
-            $msg = esc_html__(
-                'The following plugins, addons, or modules appear to be incompatible with this version of Event Espresso and were automatically deactivated to avoid fatal errors:',
-                'event_espresso'
-            );
-            $msg .= '<ul>';
-            foreach ($class_names as $class_name) {
-                $msg .= '<li><b>Event Espresso - '
-                        . str_replace(
-                            array('EE_', 'EEM_', 'EED_', 'EES_', 'EEW_'),
-                            '',
-                            $class_name
-                        ) . '</b></li>';
-            }
-            $msg .= '</ul>';
-            $msg .= esc_html__(
-                'Compatibility issues can be avoided and/or resolved by keeping addons and plugins updated to the latest version.',
-                'event_espresso'
-            );
-            // save list of incompatible addons to wp-options for later use
-            add_option('ee_incompatible_addons', $class_names, '', 'no');
-            if (is_admin()) {
-                EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            }
-        }
-    }
-
-
-    /**
-     * brew_espresso
-     * begins the process of setting hooks for initializing EE in the correct order
-     * This is happening on the 'AHEE__EE_Bootstrap__brew_espresso' hook point
-     * which runs during the WP 'plugins_loaded' action at priority 9
-     *
-     * @return void
-     */
-    public function brew_espresso()
-    {
-        do_action('AHEE__EE_System__brew_espresso__begin', $this);
-        // load some final core systems
-        add_action('init', array($this, 'set_hooks_for_core'), 1);
-        add_action('init', array($this, 'perform_activations_upgrades_and_migrations'), 3);
-        add_action('init', array($this, 'load_CPTs_and_session'), 5);
-        add_action('init', array($this, 'load_controllers'), 7);
-        add_action('init', array($this, 'core_loaded_and_ready'), 9);
-        add_action('init', array($this, 'initialize'), 10);
-        add_action('init', array($this, 'initialize_last'), 100);
-        if (is_admin() && apply_filters('FHEE__EE_System__brew_espresso__load_pue', true)) {
-            // pew pew pew
-            $this->loader->getShared('EventEspresso\core\services\licensing\LicenseService');
-            do_action('AHEE__EE_System__brew_espresso__after_pue_init');
-        }
-        do_action('AHEE__EE_System__brew_espresso__complete', $this);
-    }
-
-
-    /**
-     *    set_hooks_for_core
-     *
-     * @access public
-     * @return    void
-     * @throws EE_Error
-     */
-    public function set_hooks_for_core()
-    {
-        $this->_deactivate_incompatible_addons();
-        do_action('AHEE__EE_System__set_hooks_for_core');
-        $this->loader->getShared('EventEspresso\core\domain\values\session\SessionLifespan');
-        // caps need to be initialized on every request so that capability maps are set.
-        // @see https://events.codebasehq.com/projects/event-espresso/tickets/8674
-        $this->registry->CAP->init_caps();
-    }
-
-
-    /**
-     * Using the information gathered in EE_System::_incompatible_addon_error,
-     * deactivates any addons considered incompatible with the current version of EE
-     */
-    private function _deactivate_incompatible_addons()
-    {
-        $incompatible_addons = get_option('ee_incompatible_addons', array());
-        if (! empty($incompatible_addons)) {
-            $active_plugins = get_option('active_plugins', array());
-            foreach ($active_plugins as $active_plugin) {
-                foreach ($incompatible_addons as $incompatible_addon) {
-                    if (strpos($active_plugin, $incompatible_addon) !== false) {
-                        $this->request->unSetRequestParams(['activate'], true);
-                        espresso_deactivate_plugin($active_plugin);
-                    }
-                }
-            }
-        }
-    }
-
-
-    /**
-     *    perform_activations_upgrades_and_migrations
-     *
-     * @access public
-     * @return    void
-     */
-    public function perform_activations_upgrades_and_migrations()
-    {
-        do_action('AHEE__EE_System__perform_activations_upgrades_and_migrations');
-    }
-
-
-    /**
-     * @return void
-     * @throws DomainException
-     */
-    public function load_CPTs_and_session()
-    {
-        do_action('AHEE__EE_System__load_CPTs_and_session__start');
-        $this->register_custom_taxonomies->registerCustomTaxonomies();
-        $this->register_custom_post_types->registerCustomPostTypes();
-        $this->register_custom_taxonomy_terms->registerCustomTaxonomyTerms();
-        // load legacy Custom Post Types and Taxonomies
-        $this->loader->getShared('EE_Register_CPTs');
-        do_action('AHEE__EE_System__load_CPTs_and_session__complete');
-    }
-
-
-    /**
-     * load_controllers
-     * this is the best place to load any additional controllers that needs access to EE core.
-     * it is expected that all basic core EE systems, that are not dependant on the current request are loaded at this
-     * time
-     *
-     * @access public
-     * @return void
-     */
-    public function load_controllers()
-    {
-        do_action('AHEE__EE_System__load_controllers__start');
-        // let's get it started
-        if (
-            ! $this->maintenance_mode->level()
-            && ($this->request->isFrontend() || $this->request->isFrontAjax())
-        ) {
-            do_action('AHEE__EE_System__load_controllers__load_front_controllers');
-            $this->loader->getShared('EE_Front_Controller');
-        } elseif ($this->request->isAdmin() || $this->request->isAdminAjax()) {
-            do_action('AHEE__EE_System__load_controllers__load_admin_controllers');
-            $this->loader->getShared('EE_Admin');
-        } elseif ($this->request->isWordPressHeartbeat()) {
-            $this->loader->getShared('EventEspresso\core\domain\services\admin\ajax\WordpressHeartbeat');
-        }
-        do_action('AHEE__EE_System__load_controllers__complete');
-    }
-
-
-    /**
-     * core_loaded_and_ready
-     * all of the basic EE core should be loaded at this point and available regardless of M-Mode
-     *
-     * @access public
-     * @return void
-     * @throws Exception
-     */
-    public function core_loaded_and_ready()
-    {
-        if (
-            $this->request->isAdmin()
-            || $this->request->isFrontend()
-            || $this->request->isIframe()
-            || $this->request->isWordPressApi()
-        ) {
-            try {
-                $this->loader->getShared('EventEspresso\core\services\assets\I18nRegistry', [[]]);
-                $this->loader->getShared('EventEspresso\core\services\assets\Registry');
-                $this->loader->getShared('EventEspresso\core\domain\services\assets\CoreAssetManager');
-                if ($this->canLoadBlocks()) {
-                    $this->loader->getShared(
-                        'EventEspresso\core\services\editor\BlockRegistrationManager'
-                    );
-                }
-            } catch (Exception $exception) {
-                new ExceptionStackTraceDisplay($exception);
-            }
-        }
-        if (
-            $this->request->isAdmin()
-            || $this->request->isEeAjax()
-            || $this->request->isFrontend()
-        ) {
-            $this->loader->getShared('EE_Session');
-        }
-        do_action('AHEE__EE_System__core_loaded_and_ready');
-        // always load template tags, because it's faster than checking if it's a front-end request, and many page
-        // builders require these even on the front-end
-        require_once EE_PUBLIC . 'template_tags.php';
-        do_action('AHEE__EE_System__set_hooks_for_shortcodes_modules_and_addons');
-    }
-
-
-    /**
-     * initialize
-     * this is the best place to begin initializing client code
-     *
-     * @access public
-     * @return void
-     */
-    public function initialize()
-    {
-        do_action('AHEE__EE_System__initialize');
-        add_filter(
-            'safe_style_css',
-            function ($styles) {
-                $styles[] = 'display';
-                $styles[] = 'visibility';
-                $styles[] = 'position';
-                $styles[] = 'top';
-                $styles[] = 'right';
-                $styles[] = 'bottom';
-                $styles[] = 'left';
-                $styles[] = 'resize';
-                $styles[] = 'max-width';
-                $styles[] = 'max-height';
-                return $styles;
-            }
-        );
-    }
-
-
-    /**
-     * initialize_last
-     * this is run really late during the WP init hook point, and ensures that mostly everything else that needs to
-     * initialize has done so
-     *
-     * @access public
-     * @return void
-     */
-    public function initialize_last()
-    {
-        do_action('AHEE__EE_System__initialize_last');
-        /** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
-        $rewrite_rules = $this->loader->getShared(
-            'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
-        );
-        $rewrite_rules->flushRewriteRules();
-        add_action('admin_bar_init', array($this, 'addEspressoToolbar'));
-        if (
-            ($this->request->isAjax() || $this->request->isAdmin())
-            && $this->maintenance_mode->models_can_query()
-        ) {
-            $this->loader->getShared('EventEspresso\core\services\privacy\export\PersonalDataExporterManager');
-            $this->loader->getShared('EventEspresso\core\services\privacy\erasure\PersonalDataEraserManager');
-        }
-    }
-
-
-    /**
-     * @return void
-     * @throws EE_Error
-     */
-    public function addEspressoToolbar()
-    {
-        $this->loader->getShared(
-            'EventEspresso\core\domain\services\admin\AdminToolBar',
-            array($this->registry->CAP)
-        );
-    }
-
-
-    /**
-     * do_not_cache
-     * sets no cache headers and defines no cache constants for WP plugins
-     *
-     * @access public
-     * @return void
-     */
-    public static function do_not_cache()
-    {
-        // set no cache constants
-        if (! defined('DONOTCACHEPAGE')) {
-            define('DONOTCACHEPAGE', true);
-        }
-        if (! defined('DONOTCACHCEOBJECT')) {
-            define('DONOTCACHCEOBJECT', true);
-        }
-        if (! defined('DONOTCACHEDB')) {
-            define('DONOTCACHEDB', true);
-        }
-        // add no cache headers
-        add_action('send_headers', array('EE_System', 'nocache_headers'), 10);
-        // plus a little extra for nginx and Google Chrome
-        add_filter('nocache_headers', array('EE_System', 'extra_nocache_headers'), 10, 1);
-        // prevent browsers from prefetching of the rel='next' link, because it may contain content that interferes with the registration process
-        remove_action('wp_head', 'adjacent_posts_rel_link_wp_head');
-    }
-
-
-    /**
-     *    extra_nocache_headers
-     *
-     * @access    public
-     * @param $headers
-     * @return    array
-     */
-    public static function extra_nocache_headers($headers)
-    {
-        // for NGINX
-        $headers['X-Accel-Expires'] = 0;
-        // plus extra for Google Chrome since it doesn't seem to respect "no-cache", but WILL respect "no-store"
-        $headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, max-age=0';
-        return $headers;
-    }
-
-
-    /**
-     *    nocache_headers
-     *
-     * @access    public
-     * @return    void
-     */
-    public static function nocache_headers()
-    {
-        nocache_headers();
-    }
-
-
-    /**
-     * simply hooks into "wp_list_pages_exclude" filter (for wp_list_pages method) and makes sure EE critical pages are
-     * never returned with the function.
-     *
-     * @param  array $exclude_array any existing pages being excluded are in this array.
-     * @return array
-     */
-    public function remove_pages_from_wp_list_pages($exclude_array)
-    {
-        return array_merge($exclude_array, $this->registry->CFG->core->get_critical_pages_array());
-    }
-
-
-    /**
-     * Return whether blocks can be registered/loaded or not.
-     * @return bool
-     */
-    private function canLoadBlocks()
-    {
-        return apply_filters('FHEE__EE_System__canLoadBlocks', true)
-               && function_exists('register_block_type')
-               // don't load blocks if in the Divi page builder editor context
-               // @see https://github.com/eventespresso/event-espresso-core/issues/814
-               && ! $this->request->getRequestParam('et_fb', false);
-    }
+	/**
+	 * indicates this is a 'normal' request. Ie, not activation, nor upgrade, nor activation.
+	 * So examples of this would be a normal GET request on the frontend or backend, or a POST, etc
+	 */
+	const req_type_normal = 0;
+
+	/**
+	 * Indicates this is a brand new installation of EE so we should install
+	 * tables and default data etc
+	 */
+	const req_type_new_activation = 1;
+
+	/**
+	 * we've detected that EE has been reactivated (or EE was activated during maintenance mode,
+	 * and we just exited maintenance mode). We MUST check the database is setup properly
+	 * and that default data is setup too
+	 */
+	const req_type_reactivation = 2;
+
+	/**
+	 * indicates that EE has been upgraded since its previous request.
+	 * We may have data migration scripts to call and will want to trigger maintenance mode
+	 */
+	const req_type_upgrade = 3;
+
+	/**
+	 * TODO  will detect that EE has been DOWNGRADED. We probably don't want to run in this case...
+	 */
+	const req_type_downgrade = 4;
+
+	/**
+	 * @deprecated since version 4.6.0.dev.006
+	 * Now whenever a new_activation is detected the request type is still just
+	 * new_activation (same for reactivation, upgrade, downgrade etc), but if we'r ein maintenance mode
+	 * EE_System::initialize_db_if_no_migrations_required and EE_Addon::initialize_db_if_no_migrations_required
+	 * will instead enqueue that EE plugin's db initialization for when we're taken out of maintenance mode.
+	 * (Specifically, when the migration manager indicates migrations are finished
+	 * EE_Data_Migration_Manager::initialize_db_for_enqueued_ee_plugins() will be called)
+	 */
+	const req_type_activation_but_not_installed = 5;
+
+	/**
+	 * option prefix for recording the activation history (like core's "espresso_db_update") of addons
+	 */
+	const addon_activation_history_option_prefix = 'ee_addon_activation_history_';
+
+	/**
+	 * @var EE_System $_instance
+	 */
+	private static $_instance;
+
+	/**
+	 * @var EE_Registry $registry
+	 */
+	private $registry;
+
+	/**
+	 * @var LoaderInterface $loader
+	 */
+	private $loader;
+
+	/**
+	 * @var EE_Capabilities $capabilities
+	 */
+	private $capabilities;
+
+	/**
+	 * @var RequestInterface $request
+	 */
+	private $request;
+
+	/**
+	 * @var EE_Maintenance_Mode $maintenance_mode
+	 */
+	private $maintenance_mode;
+
+	/**
+	 * Stores which type of request this is, options being one of the constants on EE_System starting with req_type_*.
+	 * It can be a brand-new activation, a reactivation, an upgrade, a downgrade, or a normal request.
+	 *
+	 * @var int $_req_type
+	 */
+	private $_req_type;
+
+	/**
+	 * Whether or not there was a non-micro version change in EE core version during this request
+	 *
+	 * @var boolean $_major_version_change
+	 */
+	private $_major_version_change = false;
+
+	/**
+	 * A Context DTO dedicated solely to identifying the current request type.
+	 *
+	 * @var RequestTypeContextCheckerInterface $request_type
+	 */
+	private $request_type;
+
+	/**
+	 * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes
+	 */
+	private $register_custom_post_types;
+
+	/**
+	 * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies
+	 */
+	private $register_custom_taxonomies;
+
+	/**
+	 * @param EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms
+	 */
+	private $register_custom_taxonomy_terms;
+
+	/**
+	 * @singleton method used to instantiate class object
+	 * @param EE_Registry|null         $registry
+	 * @param LoaderInterface|null     $loader
+	 * @param RequestInterface|null    $request
+	 * @param EE_Maintenance_Mode|null $maintenance_mode
+	 * @return EE_System
+	 */
+	public static function instance(
+		EE_Registry $registry = null,
+		LoaderInterface $loader = null,
+		RequestInterface $request = null,
+		EE_Maintenance_Mode $maintenance_mode = null
+	) {
+		// check if class object is instantiated
+		if (! self::$_instance instanceof EE_System) {
+			self::$_instance = new self($registry, $loader, $request, $maintenance_mode);
+		}
+		return self::$_instance;
+	}
+
+
+	/**
+	 * resets the instance and returns it
+	 *
+	 * @return EE_System
+	 */
+	public static function reset()
+	{
+		self::$_instance->_req_type = null;
+		// make sure none of the old hooks are left hanging around
+		remove_all_actions('AHEE__EE_System__perform_activations_upgrades_and_migrations');
+		// we need to reset the migration manager in order for it to detect DMSs properly
+		EE_Data_Migration_Manager::reset();
+		self::instance()->detect_activations_or_upgrades();
+		self::instance()->perform_activations_upgrades_and_migrations();
+		return self::instance();
+	}
+
+
+	/**
+	 * sets hooks for running rest of system
+	 * provides "AHEE__EE_System__construct__complete" hook for EE Addons to use as their starting point
+	 * starting EE Addons from any other point may lead to problems
+	 *
+	 * @param EE_Registry         $registry
+	 * @param LoaderInterface     $loader
+	 * @param RequestInterface    $request
+	 * @param EE_Maintenance_Mode $maintenance_mode
+	 */
+	private function __construct(
+		EE_Registry $registry,
+		LoaderInterface $loader,
+		RequestInterface $request,
+		EE_Maintenance_Mode $maintenance_mode
+	) {
+		$this->registry = $registry;
+		$this->loader = $loader;
+		$this->request = $request;
+		$this->maintenance_mode = $maintenance_mode;
+		do_action('AHEE__EE_System__construct__begin', $this);
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			array($this, 'loadCapabilities'),
+			5
+		);
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			array($this, 'loadCommandBus'),
+			7
+		);
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			array($this, 'loadPluginApi'),
+			9
+		);
+		// allow addons to load first so that they can register autoloaders, set hooks for running DMS's, etc
+		add_action(
+			'AHEE__EE_Bootstrap__load_espresso_addons',
+			array($this, 'load_espresso_addons')
+		);
+		// when an ee addon is activated, we want to call the core hook(s) again
+		// because the newly-activated addon didn't get a chance to run at all
+		add_action('activate_plugin', array($this, 'load_espresso_addons'), 1);
+		// detect whether install or upgrade
+		add_action(
+			'AHEE__EE_Bootstrap__detect_activations_or_upgrades',
+			array($this, 'detect_activations_or_upgrades'),
+			3
+		);
+		// load EE_Config, EE_Textdomain, etc
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			array($this, 'load_core_configuration'),
+			5
+		);
+		// load specifications for matching routes to current request
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			array($this, 'loadRouteMatchSpecifications')
+		);
+		// load specifications for custom post types
+		add_action(
+			'AHEE__EE_Bootstrap__load_core_configuration',
+			array($this, 'loadCustomPostTypes')
+		);
+		// load EE_Config, EE_Textdomain, etc
+		add_action(
+			'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets',
+			array($this, 'register_shortcodes_modules_and_widgets'),
+			7
+		);
+		// you wanna get going? I wanna get going... let's get going!
+		add_action(
+			'AHEE__EE_Bootstrap__brew_espresso',
+			array($this, 'brew_espresso'),
+			9
+		);
+		// other housekeeping
+		// exclude EE critical pages from wp_list_pages
+		add_filter(
+			'wp_list_pages_excludes',
+			array($this, 'remove_pages_from_wp_list_pages'),
+			10
+		);
+		// ALL EE Addons should use the following hook point to attach their initial setup too
+		// it's extremely important for EE Addons to register any class autoloaders so that they can be available when the EE_Config loads
+		do_action('AHEE__EE_System__construct__complete', $this);
+	}
+
+
+	/**
+	 * load and setup EE_Capabilities
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 */
+	public function loadCapabilities()
+	{
+		$this->capabilities = $this->loader->getShared('EE_Capabilities');
+		add_action(
+			'AHEE__EE_Capabilities__init_caps__before_initialization',
+			function () {
+				LoaderFactory::getLoader()->getShared('EE_Payment_Method_Manager');
+			}
+		);
+	}
+
+
+	/**
+	 * create and cache the CommandBus, and also add middleware
+	 * The CapChecker middleware requires the use of EE_Capabilities
+	 * which is why we need to load the CommandBus after Caps are set up
+	 * CommandBus middleware operate FIFO - First In First Out
+	 * so LocateMovedCommands will run first in order to return any new commands
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 */
+	public function loadCommandBus()
+	{
+		$this->loader->getShared(
+			'CommandBusInterface',
+			array(
+				null,
+				apply_filters(
+					'FHEE__EE_Load_Espresso_Core__handle_request__CommandBus_middleware',
+					array(
+						$this->loader->getShared('EventEspresso\core\services\commands\middleware\LocateMovedCommands'),
+						$this->loader->getShared('EventEspresso\core\services\commands\middleware\CapChecker'),
+						$this->loader->getShared('EventEspresso\core\services\commands\middleware\AddActionHook'),
+					)
+				),
+			)
+		);
+	}
+
+
+	/**
+	 * @return void
+	 * @throws EE_Error
+	 */
+	public function loadPluginApi()
+	{
+		// set autoloaders for all of the classes implementing EEI_Plugin_API
+		// which provide helpers for EE plugin authors to more easily register certain components with EE.
+		EEH_Autoloader::instance()->register_autoloaders_for_each_file_in_folder(EE_LIBRARIES . 'plugin_api');
+	}
+
+
+	/**
+	 * @param string $addon_name
+	 * @param string $version_constant
+	 * @param string $min_version_required
+	 * @param string $load_callback
+	 * @param string $plugin_file_constant
+	 * @return void
+	 */
+	private function deactivateIncompatibleAddon(
+		$addon_name,
+		$version_constant,
+		$min_version_required,
+		$load_callback,
+		$plugin_file_constant
+	) {
+		if (! defined($version_constant)) {
+			return;
+		}
+		$addon_version = constant($version_constant);
+		if ($addon_version && version_compare($addon_version, $min_version_required, '<')) {
+			remove_action('AHEE__EE_System__load_espresso_addons', $load_callback);
+			if (! function_exists('deactivate_plugins')) {
+				require_once ABSPATH . 'wp-admin/includes/plugin.php';
+			}
+			deactivate_plugins(plugin_basename(constant($plugin_file_constant)));
+			$this->request->unSetRequestParams(['activate', 'activate-multi'], true);
+			EE_Error::add_error(
+				sprintf(
+					esc_html__(
+						'We\'re sorry, but the Event Espresso %1$s addon was deactivated because version %2$s or higher is required with this version of Event Espresso core.',
+						'event_espresso'
+					),
+					$addon_name,
+					$min_version_required
+				),
+				__FILE__,
+				__FUNCTION__ . "({$addon_name})",
+				__LINE__
+			);
+			EE_Error::get_notices(false, true);
+		}
+	}
+
+
+	/**
+	 * load_espresso_addons
+	 * allow addons to load first so that they can set hooks for running DMS's, etc
+	 * this is hooked into both:
+	 *    'AHEE__EE_Bootstrap__load_core_configuration'
+	 *        which runs during the WP 'plugins_loaded' action at priority 5
+	 *    and the WP 'activate_plugin' hook point
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function load_espresso_addons()
+	{
+		$this->deactivateIncompatibleAddon(
+			'Wait Lists',
+			'EE_WAIT_LISTS_VERSION',
+			'1.0.0.beta.074',
+			'load_espresso_wait_lists',
+			'EE_WAIT_LISTS_PLUGIN_FILE'
+		);
+		$this->deactivateIncompatibleAddon(
+			'Automated Upcoming Event Notifications',
+			'EE_AUTOMATED_UPCOMING_EVENT_NOTIFICATION_VERSION',
+			'1.0.0.beta.091',
+			'load_espresso_automated_upcoming_event_notification',
+			'EE_AUTOMATED_UPCOMING_EVENT_NOTIFICATION_PLUGIN_FILE'
+		);
+		do_action('AHEE__EE_System__load_espresso_addons');
+		// if the WP API basic auth plugin isn't already loaded, load it now.
+		// We want it for mobile apps. Just include the entire plugin
+		// also, don't load the basic auth when a plugin is getting activated, because
+		// it could be the basic auth plugin, and it doesn't check if its methods are already defined
+		// and causes a fatal error
+		if (
+			($this->request->isWordPressApi() || $this->request->isApi())
+			&& $this->request->getRequestParam('activate') !== 'true'
+			&& ! function_exists('json_basic_auth_handler')
+			&& ! function_exists('json_basic_auth_error')
+			&& ! in_array(
+				$this->request->getRequestParam('action'),
+				array('activate', 'activate-selected'),
+				true
+			)
+		) {
+			include_once EE_THIRD_PARTY . 'wp-api-basic-auth/basic-auth.php';
+		}
+		do_action('AHEE__EE_System__load_espresso_addons__complete');
+	}
+
+
+	/**
+	 * detect_activations_or_upgrades
+	 * Checks for activation or upgrade of core first;
+	 * then also checks if any registered addons have been activated or upgraded
+	 * This is hooked into 'AHEE__EE_Bootstrap__detect_activations_or_upgrades'
+	 * which runs during the WP 'plugins_loaded' action at priority 3
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function detect_activations_or_upgrades()
+	{
+		// first off: let's make sure to handle core
+		$this->detect_if_activation_or_upgrade();
+		foreach ($this->registry->addons as $addon) {
+			if ($addon instanceof EE_Addon) {
+				// detect teh request type for that addon
+				$addon->detect_req_type();
+			}
+		}
+	}
+
+
+	/**
+	 * detect_if_activation_or_upgrade
+	 * Takes care of detecting whether this is a brand new install or code upgrade,
+	 * and either setting up the DB or setting up maintenance mode etc.
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function detect_if_activation_or_upgrade()
+	{
+		do_action('AHEE__EE_System___detect_if_activation_or_upgrade__begin');
+		// check if db has been updated, or if its a brand-new installation
+		$espresso_db_update = $this->fix_espresso_db_upgrade_option();
+		$request_type = $this->detect_req_type($espresso_db_update);
+		// EEH_Debug_Tools::printr( $request_type, '$request_type', __FILE__, __LINE__ );
+		switch ($request_type) {
+			case EE_System::req_type_new_activation:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__new_activation');
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_reactivation:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__reactivation');
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_upgrade:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__upgrade');
+				// migrations may be required now that we've upgraded
+				$this->maintenance_mode->set_maintenance_mode_if_db_old();
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_downgrade:
+				do_action('AHEE__EE_System__detect_if_activation_or_upgrade__downgrade');
+				// its possible migrations are no longer required
+				$this->maintenance_mode->set_maintenance_mode_if_db_old();
+				$this->_handle_core_version_change($espresso_db_update);
+				break;
+			case EE_System::req_type_normal:
+			default:
+				break;
+		}
+		do_action('AHEE__EE_System__detect_if_activation_or_upgrade__complete');
+	}
+
+
+	/**
+	 * Updates the list of installed versions and sets hooks for
+	 * initializing the database later during the request
+	 *
+	 * @param array $espresso_db_update
+	 */
+	private function _handle_core_version_change($espresso_db_update)
+	{
+		$this->update_list_of_installed_versions($espresso_db_update);
+		// get ready to verify the DB is ok (provided we aren't in maintenance mode, of course)
+		add_action(
+			'AHEE__EE_System__perform_activations_upgrades_and_migrations',
+			array($this, 'initialize_db_if_no_migrations_required')
+		);
+	}
+
+
+	/**
+	 * standardizes the wp option 'espresso_db_upgrade' which actually stores
+	 * information about what versions of EE have been installed and activated,
+	 * NOT necessarily the state of the database
+	 *
+	 * @param mixed $espresso_db_update           the value of the WordPress option.
+	 *                                            If not supplied, fetches it from the options table
+	 * @return array the correct value of 'espresso_db_upgrade', after saving it, if it needed correction
+	 */
+	private function fix_espresso_db_upgrade_option($espresso_db_update = null)
+	{
+		do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__begin', $espresso_db_update);
+		if (! $espresso_db_update) {
+			$espresso_db_update = get_option('espresso_db_update');
+		}
+		// check that option is an array
+		if (! is_array($espresso_db_update)) {
+			// if option is FALSE, then it never existed
+			if ($espresso_db_update === false) {
+				// make $espresso_db_update an array and save option with autoload OFF
+				$espresso_db_update = array();
+				add_option('espresso_db_update', $espresso_db_update, '', 'no');
+			} else {
+				// option is NOT FALSE but also is NOT an array, so make it an array and save it
+				$espresso_db_update = array($espresso_db_update => array());
+				update_option('espresso_db_update', $espresso_db_update);
+			}
+		} else {
+			$corrected_db_update = array();
+			// if IS an array, but is it an array where KEYS are version numbers, and values are arrays?
+			foreach ($espresso_db_update as $should_be_version_string => $should_be_array) {
+				if (is_int($should_be_version_string) && ! is_array($should_be_array)) {
+					// the key is an int, and the value IS NOT an array
+					// so it must be numerically-indexed, where values are versions installed...
+					// fix it!
+					$version_string = $should_be_array;
+					$corrected_db_update[ $version_string ] = array('unknown-date');
+				} else {
+					// ok it checks out
+					$corrected_db_update[ $should_be_version_string ] = $should_be_array;
+				}
+			}
+			$espresso_db_update = $corrected_db_update;
+			update_option('espresso_db_update', $espresso_db_update);
+		}
+		do_action('FHEE__EE_System__manage_fix_espresso_db_upgrade_option__complete', $espresso_db_update);
+		return $espresso_db_update;
+	}
+
+
+	/**
+	 * Does the traditional work of setting up the plugin's database and adding default data.
+	 * If migration script/process did not exist, this is what would happen on every activation/reactivation/upgrade.
+	 * NOTE: if we're in maintenance mode (which would be the case if we detect there are data
+	 * migration scripts that need to be run and a version change happens), enqueues core for database initialization,
+	 * so that it will be done when migrations are finished
+	 *
+	 * @param boolean $initialize_addons_too if true, we double-check addons' database tables etc too;
+	 * @param boolean $verify_schema         if true will re-check the database tables have the correct schema.
+	 *                                       This is a resource-intensive job
+	 *                                       so we prefer to only do it when necessary
+	 * @return void
+	 * @throws EE_Error
+	 */
+	public function initialize_db_if_no_migrations_required($initialize_addons_too = false, $verify_schema = true)
+	{
+		$request_type = $this->detect_req_type();
+		// only initialize system if we're not in maintenance mode.
+		if ($this->maintenance_mode->level() !== EE_Maintenance_Mode::level_2_complete_maintenance) {
+			/** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
+			$rewrite_rules = $this->loader->getShared(
+				'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
+			);
+			$rewrite_rules->flush();
+			if ($verify_schema) {
+				EEH_Activation::initialize_db_and_folders();
+			}
+			EEH_Activation::initialize_db_content();
+			EEH_Activation::system_initialization();
+			if ($initialize_addons_too) {
+				$this->initialize_addons();
+			}
+		} else {
+			EE_Data_Migration_Manager::instance()->enqueue_db_initialization_for('Core');
+		}
+		if (
+			$request_type === EE_System::req_type_new_activation
+			|| $request_type === EE_System::req_type_reactivation
+			|| (
+				$request_type === EE_System::req_type_upgrade
+				&& $this->is_major_version_change()
+			)
+		) {
+			add_action('AHEE__EE_System__initialize_last', array($this, 'redirect_to_about_ee'), 9);
+		}
+	}
+
+
+	/**
+	 * Initializes the db for all registered addons
+	 *
+	 * @throws EE_Error
+	 */
+	public function initialize_addons()
+	{
+		// foreach registered addon, make sure its db is up-to-date too
+		foreach ($this->registry->addons as $addon) {
+			if ($addon instanceof EE_Addon) {
+				$addon->initialize_db_if_no_migrations_required();
+			}
+		}
+	}
+
+
+	/**
+	 * Adds the current code version to the saved wp option which stores a list of all ee versions ever installed.
+	 *
+	 * @param    array  $version_history
+	 * @param    string $current_version_to_add version to be added to the version history
+	 * @return    boolean success as to whether or not this option was changed
+	 */
+	public function update_list_of_installed_versions($version_history = null, $current_version_to_add = null)
+	{
+		if (! $version_history) {
+			$version_history = $this->fix_espresso_db_upgrade_option($version_history);
+		}
+		if ($current_version_to_add === null) {
+			$current_version_to_add = espresso_version();
+		}
+		$version_history[ $current_version_to_add ][] = date('Y-m-d H:i:s', time());
+		// re-save
+		return update_option('espresso_db_update', $version_history);
+	}
+
+
+	/**
+	 * Detects if the current version indicated in the has existed in the list of
+	 * previously-installed versions of EE (espresso_db_update). Does NOT modify it (ie, no side-effect)
+	 *
+	 * @param array $espresso_db_update array from the wp option stored under the name 'espresso_db_update'.
+	 *                                  If not supplied, fetches it from the options table.
+	 *                                  Also, caches its result so later parts of the code can also know whether
+	 *                                  there's been an update or not. This way we can add the current version to
+	 *                                  espresso_db_update, but still know if this is a new install or not
+	 * @return int one of the constants on EE_System::req_type_
+	 */
+	public function detect_req_type($espresso_db_update = null)
+	{
+		if ($this->_req_type === null) {
+			$espresso_db_update = ! empty($espresso_db_update)
+				? $espresso_db_update
+				: $this->fix_espresso_db_upgrade_option();
+			$this->_req_type = EE_System::detect_req_type_given_activation_history(
+				$espresso_db_update,
+				'ee_espresso_activation',
+				espresso_version()
+			);
+			$this->_major_version_change = $this->_detect_major_version_change($espresso_db_update);
+			$this->request->setIsActivation($this->_req_type !== EE_System::req_type_normal);
+		}
+		return $this->_req_type;
+	}
+
+
+	/**
+	 * Returns whether or not there was a non-micro version change (ie, change in either
+	 * the first or second number in the version. Eg 4.9.0.rc.001 to 4.10.0.rc.000,
+	 * but not 4.9.0.rc.0001 to 4.9.1.rc.0001
+	 *
+	 * @param $activation_history
+	 * @return bool
+	 */
+	private function _detect_major_version_change($activation_history)
+	{
+		$previous_version = EE_System::_get_most_recently_active_version_from_activation_history($activation_history);
+		$previous_version_parts = explode('.', $previous_version);
+		$current_version_parts = explode('.', espresso_version());
+		return isset($previous_version_parts[0], $previous_version_parts[1], $current_version_parts[0], $current_version_parts[1])
+			   && ($previous_version_parts[0] !== $current_version_parts[0]
+				   || $previous_version_parts[1] !== $current_version_parts[1]
+			   );
+	}
+
+
+	/**
+	 * Returns true if either the major or minor version of EE changed during this request.
+	 * Eg 4.9.0.rc.001 to 4.10.0.rc.000, but not 4.9.0.rc.0001 to 4.9.1.rc.0001
+	 *
+	 * @return bool
+	 */
+	public function is_major_version_change()
+	{
+		return $this->_major_version_change;
+	}
+
+
+	/**
+	 * Determines the request type for any ee addon, given three piece of info: the current array of activation
+	 * histories (for core that' 'espresso_db_update' wp option); the name of the WordPress option which is temporarily
+	 * set upon activation of the plugin (for core it's 'ee_espresso_activation'); and the version that this plugin was
+	 * just activated to (for core that will always be espresso_version())
+	 *
+	 * @param array  $activation_history_for_addon     the option's value which stores the activation history for this
+	 *                                                 ee plugin. for core that's 'espresso_db_update'
+	 * @param string $activation_indicator_option_name the name of the WordPress option that is temporarily set to
+	 *                                                 indicate that this plugin was just activated
+	 * @param string $version_to_upgrade_to            the version that was just upgraded to (for core that will be
+	 *                                                 espresso_version())
+	 * @return int one of the constants on EE_System::req_type_*
+	 */
+	public static function detect_req_type_given_activation_history(
+		$activation_history_for_addon,
+		$activation_indicator_option_name,
+		$version_to_upgrade_to
+	) {
+		$version_is_higher = self::_new_version_is_higher($activation_history_for_addon, $version_to_upgrade_to);
+		if ($activation_history_for_addon) {
+			// it exists, so this isn't a completely new install
+			// check if this version already in that list of previously installed versions
+			if (! isset($activation_history_for_addon[ $version_to_upgrade_to ])) {
+				// it a version we haven't seen before
+				if ($version_is_higher === 1) {
+					$req_type = EE_System::req_type_upgrade;
+				} else {
+					$req_type = EE_System::req_type_downgrade;
+				}
+				delete_option($activation_indicator_option_name);
+			} else {
+				// its not an update. maybe a reactivation?
+				if (get_option($activation_indicator_option_name, false)) {
+					if ($version_is_higher === -1) {
+						$req_type = EE_System::req_type_downgrade;
+					} elseif ($version_is_higher === 0) {
+						// we've seen this version before, but it's an activation. must be a reactivation
+						$req_type = EE_System::req_type_reactivation;
+					} else {// $version_is_higher === 1
+						$req_type = EE_System::req_type_upgrade;
+					}
+					delete_option($activation_indicator_option_name);
+				} else {
+					// we've seen this version before and the activation indicate doesn't show it was just activated
+					if ($version_is_higher === -1) {
+						$req_type = EE_System::req_type_downgrade;
+					} elseif ($version_is_higher === 0) {
+						// we've seen this version before and it's not an activation. its normal request
+						$req_type = EE_System::req_type_normal;
+					} else {// $version_is_higher === 1
+						$req_type = EE_System::req_type_upgrade;
+					}
+				}
+			}
+		} else {
+			// brand new install
+			$req_type = EE_System::req_type_new_activation;
+			delete_option($activation_indicator_option_name);
+		}
+		return $req_type;
+	}
+
+
+	/**
+	 * Detects if the $version_to_upgrade_to is higher than the most recent version in
+	 * the $activation_history_for_addon
+	 *
+	 * @param array  $activation_history_for_addon (keys are versions, values are arrays of times activated,
+	 *                                             sometimes containing 'unknown-date'
+	 * @param string $version_to_upgrade_to        (current version)
+	 * @return int results of version_compare( $version_to_upgrade_to, $most_recently_active_version ).
+	 *                                             ie, -1 if $version_to_upgrade_to is LOWER (downgrade);
+	 *                                             0 if $version_to_upgrade_to MATCHES (reactivation or normal request);
+	 *                                             1 if $version_to_upgrade_to is HIGHER (upgrade) ;
+	 */
+	private static function _new_version_is_higher($activation_history_for_addon, $version_to_upgrade_to)
+	{
+		// find the most recently-activated version
+		$most_recently_active_version =
+			EE_System::_get_most_recently_active_version_from_activation_history($activation_history_for_addon);
+		return version_compare($version_to_upgrade_to, $most_recently_active_version);
+	}
+
+
+	/**
+	 * Gets the most recently active version listed in the activation history,
+	 * and if none are found (ie, it's a brand new install) returns '0.0.0.dev.000'.
+	 *
+	 * @param array $activation_history  (keys are versions, values are arrays of times activated,
+	 *                                   sometimes containing 'unknown-date'
+	 * @return string
+	 */
+	private static function _get_most_recently_active_version_from_activation_history($activation_history)
+	{
+		$most_recently_active_version_activation = '1970-01-01 00:00:00';
+		$most_recently_active_version = '0.0.0.dev.000';
+		if (is_array($activation_history)) {
+			foreach ($activation_history as $version => $times_activated) {
+				// check there is a record of when this version was activated. Otherwise,
+				// mark it as unknown
+				if (! $times_activated) {
+					$times_activated = array('unknown-date');
+				}
+				if (is_string($times_activated)) {
+					$times_activated = array($times_activated);
+				}
+				foreach ($times_activated as $an_activation) {
+					if (
+						$an_activation !== 'unknown-date'
+						&& $an_activation
+						   > $most_recently_active_version_activation
+					) {
+						$most_recently_active_version = $version;
+						$most_recently_active_version_activation = $an_activation === 'unknown-date'
+							? '1970-01-01 00:00:00'
+							: $an_activation;
+					}
+				}
+			}
+		}
+		return $most_recently_active_version;
+	}
+
+
+	/**
+	 * This redirects to the about EE page after activation
+	 *
+	 * @return void
+	 */
+	public function redirect_to_about_ee()
+	{
+		$notices = EE_Error::get_notices(false);
+		// if current user is an admin and it's not an ajax or rest request
+		if (
+			! isset($notices['errors'])
+			&& $this->request->isAdmin()
+			&& apply_filters(
+				'FHEE__EE_System__redirect_to_about_ee__do_redirect',
+				$this->capabilities->current_user_can('manage_options', 'espresso_about_default')
+			)
+		) {
+			$query_params = array('page' => 'espresso_about');
+			if (EE_System::instance()->detect_req_type() === EE_System::req_type_new_activation) {
+				$query_params['new_activation'] = true;
+			}
+			if (EE_System::instance()->detect_req_type() === EE_System::req_type_reactivation) {
+				$query_params['reactivation'] = true;
+			}
+			$url = add_query_arg($query_params, admin_url('admin.php'));
+			wp_safe_redirect($url);
+			exit();
+		}
+	}
+
+
+	/**
+	 * load_core_configuration
+	 * this is hooked into 'AHEE__EE_Bootstrap__load_core_configuration'
+	 * which runs during the WP 'plugins_loaded' action at priority 5
+	 *
+	 * @return void
+	 * @throws ReflectionException
+	 * @throws Exception
+	 */
+	public function load_core_configuration()
+	{
+		do_action('AHEE__EE_System__load_core_configuration__begin', $this);
+		$this->loader->getShared('EE_Load_Textdomain');
+		// load textdomain
+		EE_Load_Textdomain::load_textdomain();
+		// load caf stuff a chance to play during the activation process too.
+		$this->_maybe_brew_regular();
+		// load and setup EE_Config and EE_Network_Config
+		$config = $this->loader->getShared('EE_Config');
+		$this->loader->getShared('EE_Network_Config');
+		// setup autoloaders
+		// enable logging?
+		$this->loader->getShared('EventEspresso\core\services\orm\TrashLogger');
+		if ($config->admin->use_remote_logging) {
+			$this->loader->getShared('EE_Log');
+		}
+		// check for activation errors
+		$activation_errors = get_option('ee_plugin_activation_errors', false);
+		if ($activation_errors) {
+			EE_Error::add_error($activation_errors, __FILE__, __FUNCTION__, __LINE__);
+			update_option('ee_plugin_activation_errors', false);
+		}
+		// get model names
+		$this->_parse_model_names();
+		// configure custom post type definitions
+		$this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomTaxonomyDefinitions');
+		$this->loader->getShared('EventEspresso\core\domain\entities\custom_post_types\CustomPostTypeDefinitions');
+		do_action('AHEE__EE_System__load_core_configuration__complete', $this);
+	}
+
+
+	/**
+	 * cycles through all of the models/*.model.php files, and assembles an array of model names
+	 *
+	 * @return void
+	 * @throws ReflectionException
+	 */
+	private function _parse_model_names()
+	{
+		// get all the files in the EE_MODELS folder that end in .model.php
+		$models = glob(EE_MODELS . '*.model.php');
+		$model_names = array();
+		$non_abstract_db_models = array();
+		foreach ($models as $model) {
+			// get model classname
+			$classname = EEH_File::get_classname_from_filepath_with_standard_filename($model);
+			$short_name = str_replace('EEM_', '', $classname);
+			$reflectionClass = new ReflectionClass($classname);
+			if ($reflectionClass->isSubclassOf('EEM_Base') && ! $reflectionClass->isAbstract()) {
+				$non_abstract_db_models[ $short_name ] = $classname;
+			}
+			$model_names[ $short_name ] = $classname;
+		}
+		$this->registry->models = apply_filters('FHEE__EE_System__parse_model_names', $model_names);
+		$this->registry->non_abstract_db_models = apply_filters(
+			'FHEE__EE_System__parse_implemented_model_names',
+			$non_abstract_db_models
+		);
+	}
+
+
+	/**
+	 * The purpose of this method is to simply check for a file named "caffeinated/brewing_regular.php" for any hooks
+	 * that need to be setup before our EE_System launches.
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws InvalidClassException
+	 * @throws InvalidFilePathException
+	 */
+	private function _maybe_brew_regular()
+	{
+		/** @var Domain $domain */
+		$domain = DomainFactory::getShared(
+			new FullyQualifiedName(
+				'EventEspresso\core\domain\Domain'
+			),
+			array(
+				new FilePath(EVENT_ESPRESSO_MAIN_FILE),
+				Version::fromString(espresso_version()),
+			)
+		);
+		if ($domain->isCaffeinated()) {
+			require_once EE_CAFF_PATH . 'brewing_regular.php';
+		}
+	}
+
+
+	/**
+	 * @since 4.9.71.p
+	 * @throws Exception
+	 */
+	public function loadRouteMatchSpecifications()
+	{
+		try {
+			$this->loader->getShared(
+				'EventEspresso\core\services\route_match\RouteMatchSpecificationManager'
+			);
+		} catch (Exception $exception) {
+			new ExceptionStackTraceDisplay($exception);
+		}
+		do_action('AHEE__EE_System__loadRouteMatchSpecifications');
+	}
+
+
+	/**
+	 * loading CPT related classes earlier so that their definitions are available
+	 * but not performing any actual registration with WP core until load_CPTs_and_session() is called
+	 *
+	 * @since   4.10.21.p
+	 */
+	public function loadCustomPostTypes()
+	{
+		$this->register_custom_taxonomies = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomies'
+		);
+		$this->register_custom_post_types = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomPostTypes'
+		);
+		$this->register_custom_taxonomy_terms = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RegisterCustomTaxonomyTerms'
+		);
+		// integrate WP_Query with the EE models
+		$this->loader->getShared('EE_CPT_Strategy');
+		// load legacy EE_Request_Handler in case add-ons still need it
+		$this->loader->getShared('EE_Request_Handler');
+	}
+
+
+	/**
+	 * register_shortcodes_modules_and_widgets
+	 * generate lists of shortcodes and modules, then verify paths and classes
+	 * This is hooked into 'AHEE__EE_Bootstrap__register_shortcodes_modules_and_widgets'
+	 * which runs during the WP 'plugins_loaded' action at priority 7
+	 *
+	 * @access public
+	 * @return void
+	 * @throws Exception
+	 */
+	public function register_shortcodes_modules_and_widgets()
+	{
+		if ($this->request->isFrontend() || $this->request->isIframe() || $this->request->isAjax()) {
+			// load, register, and add shortcodes the new way
+			$this->loader->getShared('EventEspresso\core\services\shortcodes\ShortcodesManager');
+		}
+		do_action('AHEE__EE_System__register_shortcodes_modules_and_widgets');
+		// check for addons using old hook point
+		if (has_action('AHEE__EE_System__register_shortcodes_modules_and_addons')) {
+			$this->_incompatible_addon_error();
+		}
+	}
+
+
+	/**
+	 * _incompatible_addon_error
+	 *
+	 * @access public
+	 * @return void
+	 */
+	private function _incompatible_addon_error()
+	{
+		// get array of classes hooking into here
+		$class_names = EEH_Class_Tools::get_class_names_for_all_callbacks_on_hook(
+			'AHEE__EE_System__register_shortcodes_modules_and_addons'
+		);
+		if (! empty($class_names)) {
+			$msg = esc_html__(
+				'The following plugins, addons, or modules appear to be incompatible with this version of Event Espresso and were automatically deactivated to avoid fatal errors:',
+				'event_espresso'
+			);
+			$msg .= '<ul>';
+			foreach ($class_names as $class_name) {
+				$msg .= '<li><b>Event Espresso - '
+						. str_replace(
+							array('EE_', 'EEM_', 'EED_', 'EES_', 'EEW_'),
+							'',
+							$class_name
+						) . '</b></li>';
+			}
+			$msg .= '</ul>';
+			$msg .= esc_html__(
+				'Compatibility issues can be avoided and/or resolved by keeping addons and plugins updated to the latest version.',
+				'event_espresso'
+			);
+			// save list of incompatible addons to wp-options for later use
+			add_option('ee_incompatible_addons', $class_names, '', 'no');
+			if (is_admin()) {
+				EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			}
+		}
+	}
+
+
+	/**
+	 * brew_espresso
+	 * begins the process of setting hooks for initializing EE in the correct order
+	 * This is happening on the 'AHEE__EE_Bootstrap__brew_espresso' hook point
+	 * which runs during the WP 'plugins_loaded' action at priority 9
+	 *
+	 * @return void
+	 */
+	public function brew_espresso()
+	{
+		do_action('AHEE__EE_System__brew_espresso__begin', $this);
+		// load some final core systems
+		add_action('init', array($this, 'set_hooks_for_core'), 1);
+		add_action('init', array($this, 'perform_activations_upgrades_and_migrations'), 3);
+		add_action('init', array($this, 'load_CPTs_and_session'), 5);
+		add_action('init', array($this, 'load_controllers'), 7);
+		add_action('init', array($this, 'core_loaded_and_ready'), 9);
+		add_action('init', array($this, 'initialize'), 10);
+		add_action('init', array($this, 'initialize_last'), 100);
+		if (is_admin() && apply_filters('FHEE__EE_System__brew_espresso__load_pue', true)) {
+			// pew pew pew
+			$this->loader->getShared('EventEspresso\core\services\licensing\LicenseService');
+			do_action('AHEE__EE_System__brew_espresso__after_pue_init');
+		}
+		do_action('AHEE__EE_System__brew_espresso__complete', $this);
+	}
+
+
+	/**
+	 *    set_hooks_for_core
+	 *
+	 * @access public
+	 * @return    void
+	 * @throws EE_Error
+	 */
+	public function set_hooks_for_core()
+	{
+		$this->_deactivate_incompatible_addons();
+		do_action('AHEE__EE_System__set_hooks_for_core');
+		$this->loader->getShared('EventEspresso\core\domain\values\session\SessionLifespan');
+		// caps need to be initialized on every request so that capability maps are set.
+		// @see https://events.codebasehq.com/projects/event-espresso/tickets/8674
+		$this->registry->CAP->init_caps();
+	}
+
+
+	/**
+	 * Using the information gathered in EE_System::_incompatible_addon_error,
+	 * deactivates any addons considered incompatible with the current version of EE
+	 */
+	private function _deactivate_incompatible_addons()
+	{
+		$incompatible_addons = get_option('ee_incompatible_addons', array());
+		if (! empty($incompatible_addons)) {
+			$active_plugins = get_option('active_plugins', array());
+			foreach ($active_plugins as $active_plugin) {
+				foreach ($incompatible_addons as $incompatible_addon) {
+					if (strpos($active_plugin, $incompatible_addon) !== false) {
+						$this->request->unSetRequestParams(['activate'], true);
+						espresso_deactivate_plugin($active_plugin);
+					}
+				}
+			}
+		}
+	}
+
+
+	/**
+	 *    perform_activations_upgrades_and_migrations
+	 *
+	 * @access public
+	 * @return    void
+	 */
+	public function perform_activations_upgrades_and_migrations()
+	{
+		do_action('AHEE__EE_System__perform_activations_upgrades_and_migrations');
+	}
+
+
+	/**
+	 * @return void
+	 * @throws DomainException
+	 */
+	public function load_CPTs_and_session()
+	{
+		do_action('AHEE__EE_System__load_CPTs_and_session__start');
+		$this->register_custom_taxonomies->registerCustomTaxonomies();
+		$this->register_custom_post_types->registerCustomPostTypes();
+		$this->register_custom_taxonomy_terms->registerCustomTaxonomyTerms();
+		// load legacy Custom Post Types and Taxonomies
+		$this->loader->getShared('EE_Register_CPTs');
+		do_action('AHEE__EE_System__load_CPTs_and_session__complete');
+	}
+
+
+	/**
+	 * load_controllers
+	 * this is the best place to load any additional controllers that needs access to EE core.
+	 * it is expected that all basic core EE systems, that are not dependant on the current request are loaded at this
+	 * time
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function load_controllers()
+	{
+		do_action('AHEE__EE_System__load_controllers__start');
+		// let's get it started
+		if (
+			! $this->maintenance_mode->level()
+			&& ($this->request->isFrontend() || $this->request->isFrontAjax())
+		) {
+			do_action('AHEE__EE_System__load_controllers__load_front_controllers');
+			$this->loader->getShared('EE_Front_Controller');
+		} elseif ($this->request->isAdmin() || $this->request->isAdminAjax()) {
+			do_action('AHEE__EE_System__load_controllers__load_admin_controllers');
+			$this->loader->getShared('EE_Admin');
+		} elseif ($this->request->isWordPressHeartbeat()) {
+			$this->loader->getShared('EventEspresso\core\domain\services\admin\ajax\WordpressHeartbeat');
+		}
+		do_action('AHEE__EE_System__load_controllers__complete');
+	}
+
+
+	/**
+	 * core_loaded_and_ready
+	 * all of the basic EE core should be loaded at this point and available regardless of M-Mode
+	 *
+	 * @access public
+	 * @return void
+	 * @throws Exception
+	 */
+	public function core_loaded_and_ready()
+	{
+		if (
+			$this->request->isAdmin()
+			|| $this->request->isFrontend()
+			|| $this->request->isIframe()
+			|| $this->request->isWordPressApi()
+		) {
+			try {
+				$this->loader->getShared('EventEspresso\core\services\assets\I18nRegistry', [[]]);
+				$this->loader->getShared('EventEspresso\core\services\assets\Registry');
+				$this->loader->getShared('EventEspresso\core\domain\services\assets\CoreAssetManager');
+				if ($this->canLoadBlocks()) {
+					$this->loader->getShared(
+						'EventEspresso\core\services\editor\BlockRegistrationManager'
+					);
+				}
+			} catch (Exception $exception) {
+				new ExceptionStackTraceDisplay($exception);
+			}
+		}
+		if (
+			$this->request->isAdmin()
+			|| $this->request->isEeAjax()
+			|| $this->request->isFrontend()
+		) {
+			$this->loader->getShared('EE_Session');
+		}
+		do_action('AHEE__EE_System__core_loaded_and_ready');
+		// always load template tags, because it's faster than checking if it's a front-end request, and many page
+		// builders require these even on the front-end
+		require_once EE_PUBLIC . 'template_tags.php';
+		do_action('AHEE__EE_System__set_hooks_for_shortcodes_modules_and_addons');
+	}
+
+
+	/**
+	 * initialize
+	 * this is the best place to begin initializing client code
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function initialize()
+	{
+		do_action('AHEE__EE_System__initialize');
+		add_filter(
+			'safe_style_css',
+			function ($styles) {
+				$styles[] = 'display';
+				$styles[] = 'visibility';
+				$styles[] = 'position';
+				$styles[] = 'top';
+				$styles[] = 'right';
+				$styles[] = 'bottom';
+				$styles[] = 'left';
+				$styles[] = 'resize';
+				$styles[] = 'max-width';
+				$styles[] = 'max-height';
+				return $styles;
+			}
+		);
+	}
+
+
+	/**
+	 * initialize_last
+	 * this is run really late during the WP init hook point, and ensures that mostly everything else that needs to
+	 * initialize has done so
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function initialize_last()
+	{
+		do_action('AHEE__EE_System__initialize_last');
+		/** @var EventEspresso\core\domain\services\custom_post_types\RewriteRules $rewrite_rules */
+		$rewrite_rules = $this->loader->getShared(
+			'EventEspresso\core\domain\services\custom_post_types\RewriteRules'
+		);
+		$rewrite_rules->flushRewriteRules();
+		add_action('admin_bar_init', array($this, 'addEspressoToolbar'));
+		if (
+			($this->request->isAjax() || $this->request->isAdmin())
+			&& $this->maintenance_mode->models_can_query()
+		) {
+			$this->loader->getShared('EventEspresso\core\services\privacy\export\PersonalDataExporterManager');
+			$this->loader->getShared('EventEspresso\core\services\privacy\erasure\PersonalDataEraserManager');
+		}
+	}
+
+
+	/**
+	 * @return void
+	 * @throws EE_Error
+	 */
+	public function addEspressoToolbar()
+	{
+		$this->loader->getShared(
+			'EventEspresso\core\domain\services\admin\AdminToolBar',
+			array($this->registry->CAP)
+		);
+	}
+
+
+	/**
+	 * do_not_cache
+	 * sets no cache headers and defines no cache constants for WP plugins
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public static function do_not_cache()
+	{
+		// set no cache constants
+		if (! defined('DONOTCACHEPAGE')) {
+			define('DONOTCACHEPAGE', true);
+		}
+		if (! defined('DONOTCACHCEOBJECT')) {
+			define('DONOTCACHCEOBJECT', true);
+		}
+		if (! defined('DONOTCACHEDB')) {
+			define('DONOTCACHEDB', true);
+		}
+		// add no cache headers
+		add_action('send_headers', array('EE_System', 'nocache_headers'), 10);
+		// plus a little extra for nginx and Google Chrome
+		add_filter('nocache_headers', array('EE_System', 'extra_nocache_headers'), 10, 1);
+		// prevent browsers from prefetching of the rel='next' link, because it may contain content that interferes with the registration process
+		remove_action('wp_head', 'adjacent_posts_rel_link_wp_head');
+	}
+
+
+	/**
+	 *    extra_nocache_headers
+	 *
+	 * @access    public
+	 * @param $headers
+	 * @return    array
+	 */
+	public static function extra_nocache_headers($headers)
+	{
+		// for NGINX
+		$headers['X-Accel-Expires'] = 0;
+		// plus extra for Google Chrome since it doesn't seem to respect "no-cache", but WILL respect "no-store"
+		$headers['Cache-Control'] = 'no-store, no-cache, must-revalidate, max-age=0';
+		return $headers;
+	}
+
+
+	/**
+	 *    nocache_headers
+	 *
+	 * @access    public
+	 * @return    void
+	 */
+	public static function nocache_headers()
+	{
+		nocache_headers();
+	}
+
+
+	/**
+	 * simply hooks into "wp_list_pages_exclude" filter (for wp_list_pages method) and makes sure EE critical pages are
+	 * never returned with the function.
+	 *
+	 * @param  array $exclude_array any existing pages being excluded are in this array.
+	 * @return array
+	 */
+	public function remove_pages_from_wp_list_pages($exclude_array)
+	{
+		return array_merge($exclude_array, $this->registry->CFG->core->get_critical_pages_array());
+	}
+
+
+	/**
+	 * Return whether blocks can be registered/loaded or not.
+	 * @return bool
+	 */
+	private function canLoadBlocks()
+	{
+		return apply_filters('FHEE__EE_System__canLoadBlocks', true)
+			   && function_exists('register_block_type')
+			   // don't load blocks if in the Divi page builder editor context
+			   // @see https://github.com/eventespresso/event-espresso-core/issues/814
+			   && ! $this->request->getRequestParam('et_fb', false);
+	}
 }

core/db_classes/EE_Transaction.class.php

Indentation +1706 added lines, -1706 removed lines

@@ -13,1710 +13,1710 @@
  */
 class EE_Transaction extends EE_Base_Class implements EEI_Transaction
 {
-    /**
-     * The length of time in seconds that a lock is applied before being considered expired.
-     * It is not long because a transaction should only be locked for the duration of the request that locked it
-     */
-    const LOCK_EXPIRATION = 2;
-
-    /**
-     * txn status upon initial construction.
-     *
-     * @var string
-     */
-    protected $_old_txn_status;
-
-
-    /**
-     * @param array  $props_n_values          incoming values
-     * @param string $timezone                incoming timezone
-     *                                        (if not set the timezone set for the website will be used.)
-     * @param array  $date_formats            incoming date_formats in an array where the first value is the
-     *                                        date_format and the second value is the time format
-     * @return EE_Transaction
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public static function new_instance($props_n_values = [], $timezone = null, $date_formats = [])
-    {
-        $has_object = parent::_check_for_object($props_n_values, __CLASS__, $timezone, $date_formats);
-        $txn        = $has_object
-            ? $has_object
-            : new self($props_n_values, false, $timezone, $date_formats);
-        if (! $has_object) {
-            $txn->set_old_txn_status($txn->status_ID());
-        }
-        return $txn;
-    }
-
-
-    /**
-     * @param array  $props_n_values  incoming values from the database
-     * @param string $timezone        incoming timezone as set by the model.  If not set the timezone for
-     *                                the website will be used.
-     * @return EE_Transaction
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public static function new_instance_from_db($props_n_values = [], $timezone = null)
-    {
-        $txn = new self($props_n_values, true, $timezone);
-        $txn->set_old_txn_status($txn->status_ID());
-        return $txn;
-    }
-
-
-    /**
-     * Sets a meta field indicating that this TXN is locked and should not be updated in the db.
-     * If a lock has already been set, then we will attempt to remove it in case it has expired.
-     * If that also fails, then an exception is thrown.
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function lock()
-    {
-        // attempt to set lock, but if that fails...
-        if (! $this->add_extra_meta('lock', time(), true)) {
-            // then attempt to remove the lock in case it is expired
-            if ($this->_remove_expired_lock()) {
-                // if removal was successful, then try setting lock again
-                $this->lock();
-            } else {
-                // but if the lock can not be removed, then throw an exception
-                throw new EE_Error(
-                    sprintf(
-                        esc_html__(
-                            'Could not lock Transaction %1$d because it is already locked, meaning another part of the system is currently editing it. It should already be unlocked by the time you read this, so please refresh the page and try again.',
-                            'event_espresso'
-                        ),
-                        $this->ID()
-                    )
-                );
-            }
-        }
-    }
-
-
-    /**
-     * removes transaction lock applied in EE_Transaction::lock()
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function unlock()
-    {
-        return $this->delete_extra_meta('lock');
-    }
-
-
-    /**
-     * Decides whether or not now is the right time to update the transaction.
-     * This is useful because we don't always know if it is safe to update the transaction
-     * and its related data. why?
-     * because it's possible that the transaction is being used in another
-     * request and could overwrite anything we save.
-     * So we want to only update the txn once we know that won't happen.
-     * We also check that the lock isn't expired, and remove it if it is
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_locked()
-    {
-        // if TXN is not locked, then return false immediately
-        if (! $this->_get_lock()) {
-            return false;
-        }
-        // if not, then let's try and remove the lock in case it's expired...
-        // _remove_expired_lock() returns 0 when lock is valid (ie: removed = false)
-        // and a positive number if the lock was removed (ie: number of locks deleted),
-        // so we need to return the opposite
-        return ! $this->_remove_expired_lock() ? true : false;
-    }
-
-
-    /**
-     * Gets the meta field indicating that this TXN is locked
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _get_lock()
-    {
-        return (int) $this->get_extra_meta('lock', true, 0);
-    }
-
-
-    /**
-     * If the lock on this transaction is expired, then we want to remove it so that the transaction can be updated
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _remove_expired_lock()
-    {
-        $locked = $this->_get_lock();
-        if ($locked && time() - EE_Transaction::LOCK_EXPIRATION > $locked) {
-            return $this->unlock();
-        }
-        return 0;
-    }
-
-
-    /**
-     * Set transaction total
-     *
-     * @param float $total total value of transaction
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_total($total = 0.00)
-    {
-        $this->set('TXN_total', (float) $total);
-    }
-
-
-    /**
-     * Set Total Amount Paid to Date
-     *
-     * @param float $total_paid total amount paid to date (sum of all payments)
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_paid($total_paid = 0.00)
-    {
-        $this->set('TXN_paid', (float) $total_paid);
-    }
-
-
-    /**
-     * Set transaction status
-     *
-     * @param string $status        whether the transaction is open, declined, accepted,
-     *                              or any number of custom values that can be set
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_status($status = '')
-    {
-        $this->set('STS_ID', $status);
-    }
-
-
-    /**
-     * Set hash salt
-     *
-     * @param string $hash_salt required for some payment gateways
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_hash_salt($hash_salt = '')
-    {
-        $this->set('TXN_hash_salt', $hash_salt);
-    }
-
-
-    /**
-     * Sets TXN_reg_steps array
-     *
-     * @param array $txn_reg_steps
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_reg_steps(array $txn_reg_steps)
-    {
-        $this->set('TXN_reg_steps', $txn_reg_steps);
-    }
-
-
-    /**
-     * Gets TXN_reg_steps
-     *
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function reg_steps()
-    {
-        $TXN_reg_steps = $this->get('TXN_reg_steps');
-        return is_array($TXN_reg_steps) ? $TXN_reg_steps : [];
-    }
-
-
-    /**
-     * @return string of transaction's total cost, with currency symbol and decimal
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_total()
-    {
-        return $this->get_pretty('TXN_total');
-    }
-
-
-    /**
-     * Gets the amount paid in a pretty string (formatted and with currency symbol)
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_paid()
-    {
-        return $this->get_pretty('TXN_paid');
-    }
-
-
-    /**
-     * calculate the amount remaining for this transaction and return;
-     *
-     * @return float amount remaining
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function remaining()
-    {
-        return $this->total() - $this->paid();
-    }
-
-
-    /**
-     * get Transaction Total
-     *
-     * @return float
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function total()
-    {
-        return (float) $this->get('TXN_total');
-    }
-
-
-    /**
-     * get Total Amount Paid to Date
-     *
-     * @return float
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function paid()
-    {
-        return (float) $this->get('TXN_paid');
-    }
-
-
-    /**
-     * @return mixed|null
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function get_cart_session()
-    {
-        $session_data = (array) $this->get('TXN_session_data');
-        return isset($session_data['cart']) && $session_data['cart'] instanceof EE_Cart
-            ? $session_data['cart']
-            : null;
-    }
-
-
-    /**
-     * get Transaction session data
-     *
-     * @return array|mixed
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function session_data()
-    {
-        $session_data = $this->get('TXN_session_data');
-        if (empty($session_data)) {
-            $session_data = [
-                'id'            => null,
-                'user_id'       => null,
-                'ip_address'    => null,
-                'user_agent'    => null,
-                'init_access'   => null,
-                'last_access'   => null,
-                'pages_visited' => [],
-            ];
-        }
-        return $session_data;
-    }
-
-
-    /**
-     * Set session data within the TXN object
-     *
-     * @param EE_Session|array $session_data
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_txn_session_data($session_data)
-    {
-        if ($session_data instanceof EE_Session) {
-            $this->set('TXN_session_data', $session_data->get_session_data(null, true));
-        } else {
-            $this->set('TXN_session_data', $session_data);
-        }
-    }
-
-
-    /**
-     * get Transaction hash salt
-     *
-     * @return mixed
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function hash_salt_()
-    {
-        return $this->get('TXN_hash_salt');
-    }
-
-
-    /**
-     * Returns the transaction datetime as either:
-     *            - unix timestamp format ($format = false, $gmt = true)
-     *            - formatted date string including the UTC (timezone) offset ($format = true ($gmt
-     *              has no affect with this option)), this also may include a timezone abbreviation if the
-     *              set timezone in this class differs from what the timezone is on the blog.
-     *            - formatted date string including the UTC (timezone) offset (default).
-     *
-     * @param boolean $format   - whether to return a unix timestamp (default) or formatted date string
-     * @param boolean $gmt      - whether to return a unix timestamp with UTC offset applied (default)
-     *                          or no UTC offset applied
-     * @return string | int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function datetime($format = false, $gmt = false)
-    {
-        if ($format) {
-            return $this->get_pretty('TXN_timestamp');
-        }
-        if ($gmt) {
-            return $this->get_raw('TXN_timestamp');
-        }
-        return $this->get('TXN_timestamp');
-    }
-
-
-    /**
-     * Gets registrations on this transaction
-     *
-     * @param array   $query_params array of query parameters
-     * @param boolean $get_cached   TRUE to retrieve cached registrations or FALSE to pull from the db
-     * @return EE_Base_Class[]|EE_Registration[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function registrations($query_params = [], $get_cached = false)
-    {
-        $query_params = (empty($query_params) || ! is_array($query_params))
-            ? [
-                'order_by' => [
-                    'Event.EVT_name'     => 'ASC',
-                    'Attendee.ATT_lname' => 'ASC',
-                    'Attendee.ATT_fname' => 'ASC',
-                ],
-            ]
-            : $query_params;
-        $query_params = $get_cached ? [] : $query_params;
-        return $this->get_many_related('Registration', $query_params);
-    }
-
-
-    /**
-     * Gets all the attendees for this transaction (handy for use with EE_Attendee's get_registrations_for_event
-     * function for getting attendees and how many registrations they each have for an event)
-     *
-     * @return mixed EE_Attendee[] by default, int if $output is set to 'COUNT'
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function attendees()
-    {
-        return $this->get_many_related('Attendee', [['Registration.Transaction.TXN_ID' => $this->ID()]]);
-    }
-
-
-    /**
-     * Gets payments for this transaction. Unlike other such functions, order by 'DESC' by default
-     *
-     * @param array $query_params @see
-     *                            https://github.com/eventespresso/event-espresso-core/tree/master/docs/G--Model-System/model-query-params.md
-     * @return EE_Base_Class[]|EE_Payment[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function payments($query_params = [])
-    {
-        return $this->get_many_related('Payment', $query_params);
-    }
-
-
-    /**
-     * gets only approved payments for this transaction
-     *
-     * @return EE_Base_Class[]|EE_Payment[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function approved_payments()
-    {
-        EE_Registry::instance()->load_model('Payment');
-        return $this->get_many_related(
-            'Payment',
-            [
-                ['STS_ID' => EEM_Payment::status_id_approved],
-                'order_by' => ['PAY_timestamp' => 'DESC'],
-            ]
-        );
-    }
-
-
-    /**
-     * Gets all payments which have not been approved
-     *
-     * @return EE_Base_Class[]|EEI_Payment[]
-     * @throws EE_Error if a model is misconfigured somehow
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pending_payments()
-    {
-        return $this->get_many_related(
-            'Payment',
-            [
-                [
-                    'STS_ID' => EEM_Payment::status_id_pending,
-                ],
-                'order_by' => [
-                    'PAY_timestamp' => 'DESC',
-                ],
-            ]
-        );
-    }
-
-
-    /**
-     * echoes $this->pretty_status()
-     *
-     * @param bool $show_icons
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function e_pretty_status($show_icons = false)
-    {
-        echo wp_kses($this->pretty_status($show_icons), AllowedTags::getAllowedTags());
-    }
-
-
-    /**
-     * returns a pretty version of the status, good for displaying to users
-     *
-     * @param bool $show_icons
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function pretty_status($show_icons = false)
-    {
-        $status = EEM_Status::instance()->localized_status(
-            [$this->status_ID() => esc_html__('unknown', 'event_espresso')],
-            false,
-            'sentence'
-        );
-        $icon   = '';
-        switch ($this->status_ID()) {
-            case EEM_Transaction::complete_status_code:
-                $icon = $show_icons ? '<span class="dashicons dashicons-yes ee-icon-size-24 green-text"></span>' : '';
-                break;
-            case EEM_Transaction::incomplete_status_code:
-                $icon = $show_icons ? '<span class="dashicons dashicons-marker ee-icon-size-16 lt-blue-text"></span>'
-                    : '';
-                break;
-            case EEM_Transaction::abandoned_status_code:
-                $icon = $show_icons ? '<span class="dashicons dashicons-marker ee-icon-size-16 red-text"></span>' : '';
-                break;
-            case EEM_Transaction::failed_status_code:
-                $icon = $show_icons ? '<span class="dashicons dashicons-no ee-icon-size-16 red-text"></span>' : '';
-                break;
-            case EEM_Transaction::overpaid_status_code:
-                $icon = $show_icons ? '<span class="dashicons dashicons-plus ee-icon-size-16 orange-text"></span>' : '';
-                break;
-        }
-        return $icon . $status[ $this->status_ID() ];
-    }
-
-
-    /**
-     * get Transaction Status
-     *
-     * @return mixed
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function status_ID()
-    {
-        return $this->get('STS_ID');
-    }
-
-
-    /**
-     * Returns TRUE or FALSE for whether or not this transaction cost any money
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_free()
-    {
-        return EEH_Money::compare_floats($this->get('TXN_total'), 0, '==');
-    }
-
-
-    /**
-     * Returns whether this transaction is complete
-     * Useful in templates and other logic for deciding if we should ask for another payment...
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_completed()
-    {
-        return $this->status_ID() === EEM_Transaction::complete_status_code;
-    }
-
-
-    /**
-     * Returns whether this transaction is incomplete
-     * Useful in templates and other logic for deciding if we should ask for another payment...
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_incomplete()
-    {
-        return $this->status_ID() === EEM_Transaction::incomplete_status_code;
-    }
-
-
-    /**
-     * Returns whether this transaction is overpaid
-     * Useful in templates and other logic for deciding if monies need to be refunded
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_overpaid()
-    {
-        return $this->status_ID() === EEM_Transaction::overpaid_status_code;
-    }
-
-
-    /**
-     * Returns whether this transaction was abandoned
-     * meaning that the transaction/registration process was somehow interrupted and never completed
-     * but that contact information exists for at least one registrant
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function is_abandoned()
-    {
-        return $this->status_ID() === EEM_Transaction::abandoned_status_code;
-    }
-
-
-    /**
-     * Returns whether this transaction failed
-     * meaning that the transaction/registration process was somehow interrupted and never completed
-     * and that NO contact information exists for any registrants
-     *
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function failed()
-    {
-        return $this->status_ID() === EEM_Transaction::failed_status_code;
-    }
-
-
-    /**
-     * This returns the url for the invoice of this transaction
-     *
-     * @param string $type 'html' or 'pdf' (default is pdf)
-     * @return string
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function invoice_url($type = 'html')
-    {
-        $REG = $this->primary_registration();
-        if (! $REG instanceof EE_Registration) {
-            return '';
-        }
-        return $REG->invoice_url($type);
-    }
-
-
-    /**
-     * Gets the primary registration only
-     *
-     * @return EE_Base_Class|EE_Registration
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function primary_registration()
-    {
-        $registrations = (array) $this->get_many_related(
-            'Registration',
-            [['REG_count' => EEM_Registration::PRIMARY_REGISTRANT_COUNT]]
-        );
-        foreach ($registrations as $registration) {
-            // valid registration that is NOT cancelled or declined ?
-            if (
-                $registration instanceof EE_Registration
-                && ! in_array($registration->status_ID(), EEM_Registration::closed_reg_statuses(), true)
-            ) {
-                return $registration;
-            }
-        }
-        // nothing valid found, so just return first thing from array of results
-        return reset($registrations);
-    }
-
-
-    /**
-     * Gets the URL for viewing the receipt
-     *
-     * @param string $type 'pdf' or 'html' (default is 'html')
-     * @return string
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function receipt_url($type = 'html')
-    {
-        $REG = $this->primary_registration();
-        if (! $REG instanceof EE_Registration) {
-            return '';
-        }
-        return $REG->receipt_url($type);
-    }
-
-
-    /**
-     * Gets the URL of the thank you page with this registration REG_url_link added as
-     * a query parameter
-     *
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function payment_overview_url()
-    {
-        $primary_registration = $this->primary_registration();
-        return $primary_registration instanceof EE_Registration ? $primary_registration->payment_overview_url() : false;
-    }
-
-
-    /**
-     * @return string
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function gateway_response_on_transaction()
-    {
-        $payment = $this->get_first_related('Payment');
-        return $payment instanceof EE_Payment ? $payment->gateway_response() : '';
-    }
-
-
-    /**
-     * Get the status object of this object
-     *
-     * @return EE_Base_Class|EE_Status
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function status_obj()
-    {
-        return $this->get_first_related('Status');
-    }
-
-
-    /**
-     * Gets all the extra meta info on this payment
-     *
-     * @param array $query_params
-     * @return EE_Base_Class[]|EE_Extra_Meta
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @see https://github.com/eventespresso/event-espresso-core/tree/master/docs/G--Model-System/model-query-params.md
-     */
-    public function extra_meta($query_params = [])
-    {
-        return $this->get_many_related('Extra_Meta', $query_params);
-    }
-
-
-    /**
-     * Wrapper for _add_relation_to
-     *
-     * @param EE_Registration $registration
-     * @return EE_Base_Class the relation was added to
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function add_registration(EE_Registration $registration)
-    {
-        return $this->_add_relation_to($registration, 'Registration');
-    }
-
-
-    /**
-     * Removes the given registration from being related (even before saving this transaction).
-     * If an ID/index is provided and this transaction isn't saved yet, removes it from list of cached relations
-     *
-     * @param int $registration_or_id
-     * @return EE_Base_Class that was removed from being related
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function remove_registration_with_id($registration_or_id)
-    {
-        return $this->_remove_relation_to($registration_or_id, 'Registration');
-    }
-
-
-    /**
-     * Gets all the line items which are for ACTUAL items
-     *
-     * @return EE_Line_Item[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function items_purchased()
-    {
-        return $this->line_items([['LIN_type' => EEM_Line_Item::type_line_item]]);
-    }
-
-
-    /**
-     * Wrapper for _add_relation_to
-     *
-     * @param EE_Line_Item $line_item
-     * @return EE_Base_Class the relation was added to
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function add_line_item(EE_Line_Item $line_item)
-    {
-        return $this->_add_relation_to($line_item, 'Line_Item');
-    }
-
-
-    /**
-     * Gets ALL the line items related to this transaction (unstructured)
-     *
-     * @param array $query_params
-     * @return EE_Base_Class[]|EE_Line_Item[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function line_items($query_params = [])
-    {
-        return $this->get_many_related('Line_Item', $query_params);
-    }
-
-
-    /**
-     * Gets all the line items which are taxes on the total
-     *
-     * @return EE_Line_Item[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function tax_items()
-    {
-        return $this->line_items([['LIN_type' => EEM_Line_Item::type_tax]]);
-    }
-
-
-    /**
-     * Gets the total line item (which is a parent of all other related line items,
-     * meaning it takes them all into account on its total)
-     *
-     * @param bool $create_if_not_found
-     * @return \EE_Line_Item
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function total_line_item($create_if_not_found = true)
-    {
-        $item = $this->get_first_related('Line_Item', [['LIN_type' => EEM_Line_Item::type_total]]);
-        if (! $item && $create_if_not_found) {
-            $item = EEH_Line_Item::create_total_line_item($this);
-        }
-        return $item;
-    }
-
-
-    /**
-     * Returns the total amount of tax on this transaction
-     * (assumes there's only one tax subtotal line item)
-     *
-     * @return float
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function tax_total()
-    {
-        $tax_line_item = $this->tax_total_line_item();
-        if ($tax_line_item) {
-            return (float) $tax_line_item->total();
-        }
-        return (float) 0;
-    }
-
-
-    /**
-     * Gets the tax subtotal line item (assumes there's only one)
-     *
-     * @return EE_Line_Item
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function tax_total_line_item()
-    {
-        return EEH_Line_Item::get_taxes_subtotal($this->total_line_item());
-    }
-
-
-    /**
-     * Gets the array of billing info for the gateway and for this transaction's primary registration's attendee.
-     *
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function billing_info()
-    {
-        $payment_method = $this->payment_method();
-        if (! $payment_method) {
-            EE_Error::add_error(
-                esc_html__(
-                    'Could not find billing info for transaction because no gateway has been used for it yet',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return null;
-        }
-        $primary_reg = $this->primary_registration();
-        if (! $primary_reg) {
-            EE_Error::add_error(
-                esc_html__(
-                    'Cannot get billing info for gateway %s on transaction because no primary registration exists',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return null;
-        }
-        $attendee = $primary_reg->attendee();
-        if (! $attendee) {
-            EE_Error::add_error(
-                esc_html__(
-                    'Cannot get billing info for gateway %s on transaction because the primary registration has no attendee exists',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-            return null;
-        }
-        return $attendee->billing_info_for_payment_method($payment_method);
-    }
-
-
-    /**
-     * Gets PMD_ID
-     *
-     * @return int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function payment_method_ID()
-    {
-        return $this->get('PMD_ID');
-    }
-
-
-    /**
-     * Sets PMD_ID
-     *
-     * @param int $PMD_ID
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_payment_method_ID($PMD_ID)
-    {
-        $this->set('PMD_ID', $PMD_ID);
-    }
-
-
-    /**
-     * Gets the last-used payment method on this transaction
-     * (we COULD just use the last-made payment, but some payment methods, namely
-     * offline ones, dont' create payments)
-     *
-     * @return EE_Payment_Method
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function payment_method()
-    {
-        $pm = $this->get_first_related('Payment_Method');
-        if ($pm instanceof EE_Payment_Method) {
-            return $pm;
-        }
-        $last_payment = $this->last_payment();
-        if ($last_payment instanceof EE_Payment && $last_payment->payment_method()) {
-            return $last_payment->payment_method();
-        }
-        return null;
-    }
-
-
-    /**
-     * Gets the last payment made
-     *
-     * @return EE_Base_Class|EE_Payment
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function last_payment()
-    {
-        return $this->get_first_related('Payment', ['order_by' => ['PAY_ID' => 'desc']]);
-    }
-
-
-    /**
-     * Gets all the line items which are unrelated to tickets on this transaction
-     *
-     * @return EE_Line_Item[]
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function non_ticket_line_items()
-    {
-        return EEM_Line_Item::instance()->get_all_non_ticket_line_items_for_transaction($this->ID());
-    }
-
-
-    /**
-     * possibly toggles TXN status
-     *
-     * @param boolean $update whether to save the TXN
-     * @return bool whether the TXN was saved
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     */
-    public function update_status_based_on_total_paid($update = true)
-    {
-        // set transaction status based on comparison of TXN_paid vs TXN_total
-        if (EEH_Money::compare_floats($this->paid(), $this->total(), '>')) {
-            $new_txn_status = EEM_Transaction::overpaid_status_code;
-        } elseif (EEH_Money::compare_floats($this->paid(), $this->total())) {
-            $new_txn_status = EEM_Transaction::complete_status_code;
-        } elseif (EEH_Money::compare_floats($this->paid(), $this->total(), '<')) {
-            $new_txn_status = EEM_Transaction::incomplete_status_code;
-        } else {
-            throw new RuntimeException(
-                esc_html__('The total paid calculation for this transaction is inaccurate.', 'event_espresso')
-            );
-        }
-        if ($new_txn_status !== $this->status_ID()) {
-            $this->set_status($new_txn_status);
-            if ($update) {
-                return (bool) $this->save();
-            }
-        }
-        return false;
-    }
-
-
-    /**
-     * Updates the transaction's status and total_paid based on all the payments
-     * that apply to it
-     *
-     * @return array|bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @deprecated
-     */
-    public function update_based_on_payments()
-    {
-        EE_Error::doing_it_wrong(
-            __CLASS__ . '::' . __FUNCTION__,
-            sprintf(
-                esc_html__('This method is deprecated. Please use "%s" instead', 'event_espresso'),
-                'EE_Transaction_Processor::update_transaction_and_registrations_after_checkout_or_payment()'
-            ),
-            '4.6.0'
-        );
-        /** @type EE_Transaction_Processor $transaction_processor */
-        $transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
-        return $transaction_processor->update_transaction_and_registrations_after_checkout_or_payment($this);
-    }
-
-
-    /**
-     * @return string
-     */
-    public function old_txn_status()
-    {
-        return $this->_old_txn_status;
-    }
-
-
-    /**
-     * @param string $old_txn_status
-     */
-    public function set_old_txn_status($old_txn_status)
-    {
-        // only set the first time
-        if ($this->_old_txn_status === null) {
-            $this->_old_txn_status = $old_txn_status;
-        }
-    }
-
-
-    /**
-     * reg_status_updated
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function txn_status_updated()
-    {
-        return $this->status_ID() !== $this->_old_txn_status && $this->_old_txn_status !== null;
-    }
-
-
-    /**
-     * _reg_steps_completed
-     * if $check_all is TRUE, then returns TRUE if ALL reg steps have been marked as completed,
-     * if a $reg_step_slug is provided, then this step will be skipped when testing for completion
-     * if $check_all is FALSE and a $reg_step_slug is provided, then ONLY that reg step will be tested for completion
-     *
-     * @param string $reg_step_slug
-     * @param bool   $check_all
-     * @return bool|int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _reg_steps_completed($reg_step_slug = '', $check_all = true)
-    {
-        $reg_steps = $this->reg_steps();
-        if (! is_array($reg_steps) || empty($reg_steps)) {
-            return false;
-        }
-        // loop thru reg steps array)
-        foreach ($reg_steps as $slug => $reg_step_completed) {
-            // if NOT checking ALL steps (only checking one step)
-            if (! $check_all) {
-                // and this is the one
-                if ($slug === $reg_step_slug) {
-                    return $reg_step_completed;
-                }
-                // skip to next reg step in loop
-                continue;
-            }
-            // $check_all must be true, else we would never have gotten to this point
-            if ($slug === $reg_step_slug) {
-                // if we reach this point, then we are testing either:
-                // all_reg_steps_completed_except() or
-                // all_reg_steps_completed_except_final_step(),
-                // and since this is the reg step EXCEPTION being tested
-                // we want to return true (yes true) if this reg step is NOT completed
-                // ie: "is everything completed except the final step?"
-                // "that is correct... the final step is not completed, but all others are."
-                return $reg_step_completed !== true;
-            }
-            if ($reg_step_completed !== true) {
-                // if any reg step is NOT completed, then ALL steps are not completed
-                return false;
-            }
-        }
-        return true;
-    }
-
-
-    /**
-     * all_reg_steps_completed
-     * returns:
-     *    true if ALL reg steps have been marked as completed
-     *        or false if any step is not completed
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function all_reg_steps_completed()
-    {
-        return $this->_reg_steps_completed();
-    }
-
-
-    /**
-     * all_reg_steps_completed_except
-     * returns:
-     *        true if ALL reg steps, except a particular step that you wish to skip over, have been marked as completed
-     *        or false if any other step is not completed
-     *        or false if ALL steps are completed including the exception you are testing !!!
-     *
-     * @param string $exception
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function all_reg_steps_completed_except($exception = '')
-    {
-        return $this->_reg_steps_completed($exception);
-    }
-
-
-    /**
-     * all_reg_steps_completed_except
-     * returns:
-     *        true if ALL reg steps, except the final step, have been marked as completed
-     *        or false if any step is not completed
-     *    or false if ALL steps are completed including the final step !!!
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function all_reg_steps_completed_except_final_step()
-    {
-        return $this->_reg_steps_completed('finalize_registration');
-    }
-
-
-    /**
-     * reg_step_completed
-     * returns:
-     *    true if a specific reg step has been marked as completed
-     *    a Unix timestamp if it has been initialized but not yet completed,
-     *    or false if it has not yet been initialized
-     *
-     * @param string $reg_step_slug
-     * @return bool|int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function reg_step_completed($reg_step_slug)
-    {
-        return $this->_reg_steps_completed($reg_step_slug, false);
-    }
-
-
-    /**
-     * completed_final_reg_step
-     * returns:
-     *    true if the finalize_registration reg step has been marked as completed
-     *    a Unix timestamp if it has been initialized but not yet completed,
-     *    or false if it has not yet been initialized
-     *
-     * @return bool|int
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function final_reg_step_completed()
-    {
-        return $this->_reg_steps_completed('finalize_registration', false);
-    }
-
-
-    /**
-     * set_reg_step_initiated
-     * given a valid TXN_reg_step, this sets it's value to a unix timestamp
-     *
-     * @param string $reg_step_slug
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_reg_step_initiated($reg_step_slug)
-    {
-        return $this->_set_reg_step_completed_status($reg_step_slug, time());
-    }
-
-
-    /**
-     * set_reg_step_completed
-     * given a valid TXN_reg_step, this sets the step as completed
-     *
-     * @param string $reg_step_slug
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_reg_step_completed($reg_step_slug)
-    {
-        return $this->_set_reg_step_completed_status($reg_step_slug, true);
-    }
-
-
-    /**
-     * set_reg_step_completed
-     * given a valid TXN_reg_step slug, this sets the step as NOT completed
-     *
-     * @param string $reg_step_slug
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function set_reg_step_not_completed($reg_step_slug)
-    {
-        return $this->_set_reg_step_completed_status($reg_step_slug, false);
-    }
-
-
-    /**
-     * set_reg_step_completed
-     * given a valid reg step slug, this sets the TXN_reg_step completed status which is either:
-     *
-     * @param string      $reg_step_slug
-     * @param boolean|int $status
-     * @return boolean
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _set_reg_step_completed_status($reg_step_slug, $status)
-    {
-        // validate status
-        $status = is_bool($status) || is_int($status) ? $status : false;
-        // get reg steps array
-        $txn_reg_steps = $this->reg_steps();
-        // if reg step does NOT exist
-        if (! isset($txn_reg_steps[ $reg_step_slug ])) {
-            return false;
-        }
-        // if  we're trying to complete a step that is already completed
-        if ($txn_reg_steps[ $reg_step_slug ] === true) {
-            return true;
-        }
-        // if  we're trying to complete a step that hasn't even started
-        if ($status === true && $txn_reg_steps[ $reg_step_slug ] === false) {
-            return false;
-        }
-        // if current status value matches the incoming value (no change)
-        // type casting as int means values should collapse to either 0, 1, or a timestamp like 1234567890
-        if ((int) $txn_reg_steps[ $reg_step_slug ] === (int) $status) {
-            // this will happen in cases where multiple AJAX requests occur during the same step
-            return true;
-        }
-        // if we're trying to set a start time, but it has already been set...
-        if (is_numeric($status) && is_numeric($txn_reg_steps[ $reg_step_slug ])) {
-            // skip the update below, but don't return FALSE so that errors won't be displayed
-            return true;
-        }
-        // update completed status
-        $txn_reg_steps[ $reg_step_slug ] = $status;
-        $this->set_reg_steps($txn_reg_steps);
-        $this->save();
-        return true;
-    }
-
-
-    /**
-     * remove_reg_step
-     * given a valid TXN_reg_step slug, this will remove (unset)
-     * the reg step from the TXN reg step array
-     *
-     * @param string $reg_step_slug
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function remove_reg_step($reg_step_slug)
-    {
-        // get reg steps array
-        $txn_reg_steps = $this->reg_steps();
-        unset($txn_reg_steps[ $reg_step_slug ]);
-        $this->set_reg_steps($txn_reg_steps);
-    }
-
-
-    /**
-     * toggle_failed_transaction_status
-     * upgrades a TXNs status from failed to abandoned,
-     * meaning that contact information has been captured for at least one registrant
-     *
-     * @param bool $save
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function toggle_failed_transaction_status($save = true)
-    {
-        // if TXN status is still set as "failed"...
-        if ($this->status_ID() === EEM_Transaction::failed_status_code) {
-            $this->set_status(EEM_Transaction::abandoned_status_code);
-            if ($save) {
-                $this->save();
-            }
-            return true;
-        }
-        return false;
-    }
-
-
-    /**
-     * toggle_abandoned_transaction_status
-     * upgrades a TXNs status from failed or abandoned to incomplete
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function toggle_abandoned_transaction_status()
-    {
-        // if TXN status has not been updated already due to a payment, and is still set as "failed" or "abandoned"...
-        $txn_status = $this->status_ID();
-        if (
-            $txn_status === EEM_Transaction::failed_status_code
-            || $txn_status === EEM_Transaction::abandoned_status_code
-        ) {
-            // if a contact record for the primary registrant has been created
-            if (
-                $this->primary_registration() instanceof EE_Registration
-                && $this->primary_registration()->attendee() instanceof EE_Attendee
-            ) {
-                $this->set_status(EEM_Transaction::incomplete_status_code);
-            } else {
-                // no contact record? yer abandoned!
-                $this->set_status(EEM_Transaction::abandoned_status_code);
-            }
-            return true;
-        }
-        return false;
-    }
-
-
-    /**
-     * checks if an Abandoned TXN has any related payments, and if so,
-     * updates the TXN status based on the amount paid
-     *
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws ReflectionException
-     */
-    public function verify_abandoned_transaction_status()
-    {
-        if ($this->status_ID() !== EEM_Transaction::abandoned_status_code) {
-            return;
-        }
-        $payments = $this->get_many_related('Payment');
-        if (! empty($payments)) {
-            foreach ($payments as $payment) {
-                if ($payment instanceof EE_Payment) {
-                    // kk this TXN should NOT be abandoned
-                    $this->update_status_based_on_total_paid();
-                    if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
-                        EE_Error::add_attention(
-                            sprintf(
-                                esc_html__(
-                                    'The status for Transaction #%1$d has been updated from "Abandoned" to "%2$s", because at least one payment has been made towards it. If the payment appears in the "Payment Details" table below, you may need to edit its status and/or other details as well.',
-                                    'event_espresso'
-                                ),
-                                $this->ID(),
-                                $this->pretty_status()
-                            )
-                        );
-                    }
-                    // get final reg step status
-                    $finalized = $this->final_reg_step_completed();
-                    // if the 'finalize_registration' step has been initiated (has a timestamp)
-                    // but has not yet been fully completed (TRUE)
-                    if (is_int($finalized) && $finalized !== false && $finalized !== true) {
-                        $this->set_reg_step_completed('finalize_registration');
-                        $this->save();
-                    }
-                }
-            }
-        }
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @since 4.10.4.p
-     */
-    public function recalculateLineItems()
-    {
-        $total_line_item = $this->total_line_item(false);
-        if ($total_line_item instanceof EE_Line_Item) {
-            EEH_Line_Item::resetIsTaxableForTickets($total_line_item);
-            return EEH_Line_Item::apply_taxes($total_line_item, true);
-        }
-        return false;
-    }
+	/**
+	 * The length of time in seconds that a lock is applied before being considered expired.
+	 * It is not long because a transaction should only be locked for the duration of the request that locked it
+	 */
+	const LOCK_EXPIRATION = 2;
+
+	/**
+	 * txn status upon initial construction.
+	 *
+	 * @var string
+	 */
+	protected $_old_txn_status;
+
+
+	/**
+	 * @param array  $props_n_values          incoming values
+	 * @param string $timezone                incoming timezone
+	 *                                        (if not set the timezone set for the website will be used.)
+	 * @param array  $date_formats            incoming date_formats in an array where the first value is the
+	 *                                        date_format and the second value is the time format
+	 * @return EE_Transaction
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public static function new_instance($props_n_values = [], $timezone = null, $date_formats = [])
+	{
+		$has_object = parent::_check_for_object($props_n_values, __CLASS__, $timezone, $date_formats);
+		$txn        = $has_object
+			? $has_object
+			: new self($props_n_values, false, $timezone, $date_formats);
+		if (! $has_object) {
+			$txn->set_old_txn_status($txn->status_ID());
+		}
+		return $txn;
+	}
+
+
+	/**
+	 * @param array  $props_n_values  incoming values from the database
+	 * @param string $timezone        incoming timezone as set by the model.  If not set the timezone for
+	 *                                the website will be used.
+	 * @return EE_Transaction
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public static function new_instance_from_db($props_n_values = [], $timezone = null)
+	{
+		$txn = new self($props_n_values, true, $timezone);
+		$txn->set_old_txn_status($txn->status_ID());
+		return $txn;
+	}
+
+
+	/**
+	 * Sets a meta field indicating that this TXN is locked and should not be updated in the db.
+	 * If a lock has already been set, then we will attempt to remove it in case it has expired.
+	 * If that also fails, then an exception is thrown.
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function lock()
+	{
+		// attempt to set lock, but if that fails...
+		if (! $this->add_extra_meta('lock', time(), true)) {
+			// then attempt to remove the lock in case it is expired
+			if ($this->_remove_expired_lock()) {
+				// if removal was successful, then try setting lock again
+				$this->lock();
+			} else {
+				// but if the lock can not be removed, then throw an exception
+				throw new EE_Error(
+					sprintf(
+						esc_html__(
+							'Could not lock Transaction %1$d because it is already locked, meaning another part of the system is currently editing it. It should already be unlocked by the time you read this, so please refresh the page and try again.',
+							'event_espresso'
+						),
+						$this->ID()
+					)
+				);
+			}
+		}
+	}
+
+
+	/**
+	 * removes transaction lock applied in EE_Transaction::lock()
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function unlock()
+	{
+		return $this->delete_extra_meta('lock');
+	}
+
+
+	/**
+	 * Decides whether or not now is the right time to update the transaction.
+	 * This is useful because we don't always know if it is safe to update the transaction
+	 * and its related data. why?
+	 * because it's possible that the transaction is being used in another
+	 * request and could overwrite anything we save.
+	 * So we want to only update the txn once we know that won't happen.
+	 * We also check that the lock isn't expired, and remove it if it is
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_locked()
+	{
+		// if TXN is not locked, then return false immediately
+		if (! $this->_get_lock()) {
+			return false;
+		}
+		// if not, then let's try and remove the lock in case it's expired...
+		// _remove_expired_lock() returns 0 when lock is valid (ie: removed = false)
+		// and a positive number if the lock was removed (ie: number of locks deleted),
+		// so we need to return the opposite
+		return ! $this->_remove_expired_lock() ? true : false;
+	}
+
+
+	/**
+	 * Gets the meta field indicating that this TXN is locked
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _get_lock()
+	{
+		return (int) $this->get_extra_meta('lock', true, 0);
+	}
+
+
+	/**
+	 * If the lock on this transaction is expired, then we want to remove it so that the transaction can be updated
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _remove_expired_lock()
+	{
+		$locked = $this->_get_lock();
+		if ($locked && time() - EE_Transaction::LOCK_EXPIRATION > $locked) {
+			return $this->unlock();
+		}
+		return 0;
+	}
+
+
+	/**
+	 * Set transaction total
+	 *
+	 * @param float $total total value of transaction
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_total($total = 0.00)
+	{
+		$this->set('TXN_total', (float) $total);
+	}
+
+
+	/**
+	 * Set Total Amount Paid to Date
+	 *
+	 * @param float $total_paid total amount paid to date (sum of all payments)
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_paid($total_paid = 0.00)
+	{
+		$this->set('TXN_paid', (float) $total_paid);
+	}
+
+
+	/**
+	 * Set transaction status
+	 *
+	 * @param string $status        whether the transaction is open, declined, accepted,
+	 *                              or any number of custom values that can be set
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_status($status = '')
+	{
+		$this->set('STS_ID', $status);
+	}
+
+
+	/**
+	 * Set hash salt
+	 *
+	 * @param string $hash_salt required for some payment gateways
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_hash_salt($hash_salt = '')
+	{
+		$this->set('TXN_hash_salt', $hash_salt);
+	}
+
+
+	/**
+	 * Sets TXN_reg_steps array
+	 *
+	 * @param array $txn_reg_steps
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_reg_steps(array $txn_reg_steps)
+	{
+		$this->set('TXN_reg_steps', $txn_reg_steps);
+	}
+
+
+	/**
+	 * Gets TXN_reg_steps
+	 *
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function reg_steps()
+	{
+		$TXN_reg_steps = $this->get('TXN_reg_steps');
+		return is_array($TXN_reg_steps) ? $TXN_reg_steps : [];
+	}
+
+
+	/**
+	 * @return string of transaction's total cost, with currency symbol and decimal
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_total()
+	{
+		return $this->get_pretty('TXN_total');
+	}
+
+
+	/**
+	 * Gets the amount paid in a pretty string (formatted and with currency symbol)
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_paid()
+	{
+		return $this->get_pretty('TXN_paid');
+	}
+
+
+	/**
+	 * calculate the amount remaining for this transaction and return;
+	 *
+	 * @return float amount remaining
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function remaining()
+	{
+		return $this->total() - $this->paid();
+	}
+
+
+	/**
+	 * get Transaction Total
+	 *
+	 * @return float
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function total()
+	{
+		return (float) $this->get('TXN_total');
+	}
+
+
+	/**
+	 * get Total Amount Paid to Date
+	 *
+	 * @return float
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function paid()
+	{
+		return (float) $this->get('TXN_paid');
+	}
+
+
+	/**
+	 * @return mixed|null
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function get_cart_session()
+	{
+		$session_data = (array) $this->get('TXN_session_data');
+		return isset($session_data['cart']) && $session_data['cart'] instanceof EE_Cart
+			? $session_data['cart']
+			: null;
+	}
+
+
+	/**
+	 * get Transaction session data
+	 *
+	 * @return array|mixed
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function session_data()
+	{
+		$session_data = $this->get('TXN_session_data');
+		if (empty($session_data)) {
+			$session_data = [
+				'id'            => null,
+				'user_id'       => null,
+				'ip_address'    => null,
+				'user_agent'    => null,
+				'init_access'   => null,
+				'last_access'   => null,
+				'pages_visited' => [],
+			];
+		}
+		return $session_data;
+	}
+
+
+	/**
+	 * Set session data within the TXN object
+	 *
+	 * @param EE_Session|array $session_data
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_txn_session_data($session_data)
+	{
+		if ($session_data instanceof EE_Session) {
+			$this->set('TXN_session_data', $session_data->get_session_data(null, true));
+		} else {
+			$this->set('TXN_session_data', $session_data);
+		}
+	}
+
+
+	/**
+	 * get Transaction hash salt
+	 *
+	 * @return mixed
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function hash_salt_()
+	{
+		return $this->get('TXN_hash_salt');
+	}
+
+
+	/**
+	 * Returns the transaction datetime as either:
+	 *            - unix timestamp format ($format = false, $gmt = true)
+	 *            - formatted date string including the UTC (timezone) offset ($format = true ($gmt
+	 *              has no affect with this option)), this also may include a timezone abbreviation if the
+	 *              set timezone in this class differs from what the timezone is on the blog.
+	 *            - formatted date string including the UTC (timezone) offset (default).
+	 *
+	 * @param boolean $format   - whether to return a unix timestamp (default) or formatted date string
+	 * @param boolean $gmt      - whether to return a unix timestamp with UTC offset applied (default)
+	 *                          or no UTC offset applied
+	 * @return string | int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function datetime($format = false, $gmt = false)
+	{
+		if ($format) {
+			return $this->get_pretty('TXN_timestamp');
+		}
+		if ($gmt) {
+			return $this->get_raw('TXN_timestamp');
+		}
+		return $this->get('TXN_timestamp');
+	}
+
+
+	/**
+	 * Gets registrations on this transaction
+	 *
+	 * @param array   $query_params array of query parameters
+	 * @param boolean $get_cached   TRUE to retrieve cached registrations or FALSE to pull from the db
+	 * @return EE_Base_Class[]|EE_Registration[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function registrations($query_params = [], $get_cached = false)
+	{
+		$query_params = (empty($query_params) || ! is_array($query_params))
+			? [
+				'order_by' => [
+					'Event.EVT_name'     => 'ASC',
+					'Attendee.ATT_lname' => 'ASC',
+					'Attendee.ATT_fname' => 'ASC',
+				],
+			]
+			: $query_params;
+		$query_params = $get_cached ? [] : $query_params;
+		return $this->get_many_related('Registration', $query_params);
+	}
+
+
+	/**
+	 * Gets all the attendees for this transaction (handy for use with EE_Attendee's get_registrations_for_event
+	 * function for getting attendees and how many registrations they each have for an event)
+	 *
+	 * @return mixed EE_Attendee[] by default, int if $output is set to 'COUNT'
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function attendees()
+	{
+		return $this->get_many_related('Attendee', [['Registration.Transaction.TXN_ID' => $this->ID()]]);
+	}
+
+
+	/**
+	 * Gets payments for this transaction. Unlike other such functions, order by 'DESC' by default
+	 *
+	 * @param array $query_params @see
+	 *                            https://github.com/eventespresso/event-espresso-core/tree/master/docs/G--Model-System/model-query-params.md
+	 * @return EE_Base_Class[]|EE_Payment[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function payments($query_params = [])
+	{
+		return $this->get_many_related('Payment', $query_params);
+	}
+
+
+	/**
+	 * gets only approved payments for this transaction
+	 *
+	 * @return EE_Base_Class[]|EE_Payment[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function approved_payments()
+	{
+		EE_Registry::instance()->load_model('Payment');
+		return $this->get_many_related(
+			'Payment',
+			[
+				['STS_ID' => EEM_Payment::status_id_approved],
+				'order_by' => ['PAY_timestamp' => 'DESC'],
+			]
+		);
+	}
+
+
+	/**
+	 * Gets all payments which have not been approved
+	 *
+	 * @return EE_Base_Class[]|EEI_Payment[]
+	 * @throws EE_Error if a model is misconfigured somehow
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pending_payments()
+	{
+		return $this->get_many_related(
+			'Payment',
+			[
+				[
+					'STS_ID' => EEM_Payment::status_id_pending,
+				],
+				'order_by' => [
+					'PAY_timestamp' => 'DESC',
+				],
+			]
+		);
+	}
+
+
+	/**
+	 * echoes $this->pretty_status()
+	 *
+	 * @param bool $show_icons
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function e_pretty_status($show_icons = false)
+	{
+		echo wp_kses($this->pretty_status($show_icons), AllowedTags::getAllowedTags());
+	}
+
+
+	/**
+	 * returns a pretty version of the status, good for displaying to users
+	 *
+	 * @param bool $show_icons
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function pretty_status($show_icons = false)
+	{
+		$status = EEM_Status::instance()->localized_status(
+			[$this->status_ID() => esc_html__('unknown', 'event_espresso')],
+			false,
+			'sentence'
+		);
+		$icon   = '';
+		switch ($this->status_ID()) {
+			case EEM_Transaction::complete_status_code:
+				$icon = $show_icons ? '<span class="dashicons dashicons-yes ee-icon-size-24 green-text"></span>' : '';
+				break;
+			case EEM_Transaction::incomplete_status_code:
+				$icon = $show_icons ? '<span class="dashicons dashicons-marker ee-icon-size-16 lt-blue-text"></span>'
+					: '';
+				break;
+			case EEM_Transaction::abandoned_status_code:
+				$icon = $show_icons ? '<span class="dashicons dashicons-marker ee-icon-size-16 red-text"></span>' : '';
+				break;
+			case EEM_Transaction::failed_status_code:
+				$icon = $show_icons ? '<span class="dashicons dashicons-no ee-icon-size-16 red-text"></span>' : '';
+				break;
+			case EEM_Transaction::overpaid_status_code:
+				$icon = $show_icons ? '<span class="dashicons dashicons-plus ee-icon-size-16 orange-text"></span>' : '';
+				break;
+		}
+		return $icon . $status[ $this->status_ID() ];
+	}
+
+
+	/**
+	 * get Transaction Status
+	 *
+	 * @return mixed
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function status_ID()
+	{
+		return $this->get('STS_ID');
+	}
+
+
+	/**
+	 * Returns TRUE or FALSE for whether or not this transaction cost any money
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_free()
+	{
+		return EEH_Money::compare_floats($this->get('TXN_total'), 0, '==');
+	}
+
+
+	/**
+	 * Returns whether this transaction is complete
+	 * Useful in templates and other logic for deciding if we should ask for another payment...
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_completed()
+	{
+		return $this->status_ID() === EEM_Transaction::complete_status_code;
+	}
+
+
+	/**
+	 * Returns whether this transaction is incomplete
+	 * Useful in templates and other logic for deciding if we should ask for another payment...
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_incomplete()
+	{
+		return $this->status_ID() === EEM_Transaction::incomplete_status_code;
+	}
+
+
+	/**
+	 * Returns whether this transaction is overpaid
+	 * Useful in templates and other logic for deciding if monies need to be refunded
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_overpaid()
+	{
+		return $this->status_ID() === EEM_Transaction::overpaid_status_code;
+	}
+
+
+	/**
+	 * Returns whether this transaction was abandoned
+	 * meaning that the transaction/registration process was somehow interrupted and never completed
+	 * but that contact information exists for at least one registrant
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function is_abandoned()
+	{
+		return $this->status_ID() === EEM_Transaction::abandoned_status_code;
+	}
+
+
+	/**
+	 * Returns whether this transaction failed
+	 * meaning that the transaction/registration process was somehow interrupted and never completed
+	 * and that NO contact information exists for any registrants
+	 *
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function failed()
+	{
+		return $this->status_ID() === EEM_Transaction::failed_status_code;
+	}
+
+
+	/**
+	 * This returns the url for the invoice of this transaction
+	 *
+	 * @param string $type 'html' or 'pdf' (default is pdf)
+	 * @return string
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function invoice_url($type = 'html')
+	{
+		$REG = $this->primary_registration();
+		if (! $REG instanceof EE_Registration) {
+			return '';
+		}
+		return $REG->invoice_url($type);
+	}
+
+
+	/**
+	 * Gets the primary registration only
+	 *
+	 * @return EE_Base_Class|EE_Registration
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function primary_registration()
+	{
+		$registrations = (array) $this->get_many_related(
+			'Registration',
+			[['REG_count' => EEM_Registration::PRIMARY_REGISTRANT_COUNT]]
+		);
+		foreach ($registrations as $registration) {
+			// valid registration that is NOT cancelled or declined ?
+			if (
+				$registration instanceof EE_Registration
+				&& ! in_array($registration->status_ID(), EEM_Registration::closed_reg_statuses(), true)
+			) {
+				return $registration;
+			}
+		}
+		// nothing valid found, so just return first thing from array of results
+		return reset($registrations);
+	}
+
+
+	/**
+	 * Gets the URL for viewing the receipt
+	 *
+	 * @param string $type 'pdf' or 'html' (default is 'html')
+	 * @return string
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function receipt_url($type = 'html')
+	{
+		$REG = $this->primary_registration();
+		if (! $REG instanceof EE_Registration) {
+			return '';
+		}
+		return $REG->receipt_url($type);
+	}
+
+
+	/**
+	 * Gets the URL of the thank you page with this registration REG_url_link added as
+	 * a query parameter
+	 *
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function payment_overview_url()
+	{
+		$primary_registration = $this->primary_registration();
+		return $primary_registration instanceof EE_Registration ? $primary_registration->payment_overview_url() : false;
+	}
+
+
+	/**
+	 * @return string
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function gateway_response_on_transaction()
+	{
+		$payment = $this->get_first_related('Payment');
+		return $payment instanceof EE_Payment ? $payment->gateway_response() : '';
+	}
+
+
+	/**
+	 * Get the status object of this object
+	 *
+	 * @return EE_Base_Class|EE_Status
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function status_obj()
+	{
+		return $this->get_first_related('Status');
+	}
+
+
+	/**
+	 * Gets all the extra meta info on this payment
+	 *
+	 * @param array $query_params
+	 * @return EE_Base_Class[]|EE_Extra_Meta
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @see https://github.com/eventespresso/event-espresso-core/tree/master/docs/G--Model-System/model-query-params.md
+	 */
+	public function extra_meta($query_params = [])
+	{
+		return $this->get_many_related('Extra_Meta', $query_params);
+	}
+
+
+	/**
+	 * Wrapper for _add_relation_to
+	 *
+	 * @param EE_Registration $registration
+	 * @return EE_Base_Class the relation was added to
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function add_registration(EE_Registration $registration)
+	{
+		return $this->_add_relation_to($registration, 'Registration');
+	}
+
+
+	/**
+	 * Removes the given registration from being related (even before saving this transaction).
+	 * If an ID/index is provided and this transaction isn't saved yet, removes it from list of cached relations
+	 *
+	 * @param int $registration_or_id
+	 * @return EE_Base_Class that was removed from being related
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function remove_registration_with_id($registration_or_id)
+	{
+		return $this->_remove_relation_to($registration_or_id, 'Registration');
+	}
+
+
+	/**
+	 * Gets all the line items which are for ACTUAL items
+	 *
+	 * @return EE_Line_Item[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function items_purchased()
+	{
+		return $this->line_items([['LIN_type' => EEM_Line_Item::type_line_item]]);
+	}
+
+
+	/**
+	 * Wrapper for _add_relation_to
+	 *
+	 * @param EE_Line_Item $line_item
+	 * @return EE_Base_Class the relation was added to
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function add_line_item(EE_Line_Item $line_item)
+	{
+		return $this->_add_relation_to($line_item, 'Line_Item');
+	}
+
+
+	/**
+	 * Gets ALL the line items related to this transaction (unstructured)
+	 *
+	 * @param array $query_params
+	 * @return EE_Base_Class[]|EE_Line_Item[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function line_items($query_params = [])
+	{
+		return $this->get_many_related('Line_Item', $query_params);
+	}
+
+
+	/**
+	 * Gets all the line items which are taxes on the total
+	 *
+	 * @return EE_Line_Item[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function tax_items()
+	{
+		return $this->line_items([['LIN_type' => EEM_Line_Item::type_tax]]);
+	}
+
+
+	/**
+	 * Gets the total line item (which is a parent of all other related line items,
+	 * meaning it takes them all into account on its total)
+	 *
+	 * @param bool $create_if_not_found
+	 * @return \EE_Line_Item
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function total_line_item($create_if_not_found = true)
+	{
+		$item = $this->get_first_related('Line_Item', [['LIN_type' => EEM_Line_Item::type_total]]);
+		if (! $item && $create_if_not_found) {
+			$item = EEH_Line_Item::create_total_line_item($this);
+		}
+		return $item;
+	}
+
+
+	/**
+	 * Returns the total amount of tax on this transaction
+	 * (assumes there's only one tax subtotal line item)
+	 *
+	 * @return float
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function tax_total()
+	{
+		$tax_line_item = $this->tax_total_line_item();
+		if ($tax_line_item) {
+			return (float) $tax_line_item->total();
+		}
+		return (float) 0;
+	}
+
+
+	/**
+	 * Gets the tax subtotal line item (assumes there's only one)
+	 *
+	 * @return EE_Line_Item
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function tax_total_line_item()
+	{
+		return EEH_Line_Item::get_taxes_subtotal($this->total_line_item());
+	}
+
+
+	/**
+	 * Gets the array of billing info for the gateway and for this transaction's primary registration's attendee.
+	 *
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function billing_info()
+	{
+		$payment_method = $this->payment_method();
+		if (! $payment_method) {
+			EE_Error::add_error(
+				esc_html__(
+					'Could not find billing info for transaction because no gateway has been used for it yet',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return null;
+		}
+		$primary_reg = $this->primary_registration();
+		if (! $primary_reg) {
+			EE_Error::add_error(
+				esc_html__(
+					'Cannot get billing info for gateway %s on transaction because no primary registration exists',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return null;
+		}
+		$attendee = $primary_reg->attendee();
+		if (! $attendee) {
+			EE_Error::add_error(
+				esc_html__(
+					'Cannot get billing info for gateway %s on transaction because the primary registration has no attendee exists',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+			return null;
+		}
+		return $attendee->billing_info_for_payment_method($payment_method);
+	}
+
+
+	/**
+	 * Gets PMD_ID
+	 *
+	 * @return int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function payment_method_ID()
+	{
+		return $this->get('PMD_ID');
+	}
+
+
+	/**
+	 * Sets PMD_ID
+	 *
+	 * @param int $PMD_ID
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_payment_method_ID($PMD_ID)
+	{
+		$this->set('PMD_ID', $PMD_ID);
+	}
+
+
+	/**
+	 * Gets the last-used payment method on this transaction
+	 * (we COULD just use the last-made payment, but some payment methods, namely
+	 * offline ones, dont' create payments)
+	 *
+	 * @return EE_Payment_Method
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function payment_method()
+	{
+		$pm = $this->get_first_related('Payment_Method');
+		if ($pm instanceof EE_Payment_Method) {
+			return $pm;
+		}
+		$last_payment = $this->last_payment();
+		if ($last_payment instanceof EE_Payment && $last_payment->payment_method()) {
+			return $last_payment->payment_method();
+		}
+		return null;
+	}
+
+
+	/**
+	 * Gets the last payment made
+	 *
+	 * @return EE_Base_Class|EE_Payment
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function last_payment()
+	{
+		return $this->get_first_related('Payment', ['order_by' => ['PAY_ID' => 'desc']]);
+	}
+
+
+	/**
+	 * Gets all the line items which are unrelated to tickets on this transaction
+	 *
+	 * @return EE_Line_Item[]
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function non_ticket_line_items()
+	{
+		return EEM_Line_Item::instance()->get_all_non_ticket_line_items_for_transaction($this->ID());
+	}
+
+
+	/**
+	 * possibly toggles TXN status
+	 *
+	 * @param boolean $update whether to save the TXN
+	 * @return bool whether the TXN was saved
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 */
+	public function update_status_based_on_total_paid($update = true)
+	{
+		// set transaction status based on comparison of TXN_paid vs TXN_total
+		if (EEH_Money::compare_floats($this->paid(), $this->total(), '>')) {
+			$new_txn_status = EEM_Transaction::overpaid_status_code;
+		} elseif (EEH_Money::compare_floats($this->paid(), $this->total())) {
+			$new_txn_status = EEM_Transaction::complete_status_code;
+		} elseif (EEH_Money::compare_floats($this->paid(), $this->total(), '<')) {
+			$new_txn_status = EEM_Transaction::incomplete_status_code;
+		} else {
+			throw new RuntimeException(
+				esc_html__('The total paid calculation for this transaction is inaccurate.', 'event_espresso')
+			);
+		}
+		if ($new_txn_status !== $this->status_ID()) {
+			$this->set_status($new_txn_status);
+			if ($update) {
+				return (bool) $this->save();
+			}
+		}
+		return false;
+	}
+
+
+	/**
+	 * Updates the transaction's status and total_paid based on all the payments
+	 * that apply to it
+	 *
+	 * @return array|bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @deprecated
+	 */
+	public function update_based_on_payments()
+	{
+		EE_Error::doing_it_wrong(
+			__CLASS__ . '::' . __FUNCTION__,
+			sprintf(
+				esc_html__('This method is deprecated. Please use "%s" instead', 'event_espresso'),
+				'EE_Transaction_Processor::update_transaction_and_registrations_after_checkout_or_payment()'
+			),
+			'4.6.0'
+		);
+		/** @type EE_Transaction_Processor $transaction_processor */
+		$transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
+		return $transaction_processor->update_transaction_and_registrations_after_checkout_or_payment($this);
+	}
+
+
+	/**
+	 * @return string
+	 */
+	public function old_txn_status()
+	{
+		return $this->_old_txn_status;
+	}
+
+
+	/**
+	 * @param string $old_txn_status
+	 */
+	public function set_old_txn_status($old_txn_status)
+	{
+		// only set the first time
+		if ($this->_old_txn_status === null) {
+			$this->_old_txn_status = $old_txn_status;
+		}
+	}
+
+
+	/**
+	 * reg_status_updated
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function txn_status_updated()
+	{
+		return $this->status_ID() !== $this->_old_txn_status && $this->_old_txn_status !== null;
+	}
+
+
+	/**
+	 * _reg_steps_completed
+	 * if $check_all is TRUE, then returns TRUE if ALL reg steps have been marked as completed,
+	 * if a $reg_step_slug is provided, then this step will be skipped when testing for completion
+	 * if $check_all is FALSE and a $reg_step_slug is provided, then ONLY that reg step will be tested for completion
+	 *
+	 * @param string $reg_step_slug
+	 * @param bool   $check_all
+	 * @return bool|int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _reg_steps_completed($reg_step_slug = '', $check_all = true)
+	{
+		$reg_steps = $this->reg_steps();
+		if (! is_array($reg_steps) || empty($reg_steps)) {
+			return false;
+		}
+		// loop thru reg steps array)
+		foreach ($reg_steps as $slug => $reg_step_completed) {
+			// if NOT checking ALL steps (only checking one step)
+			if (! $check_all) {
+				// and this is the one
+				if ($slug === $reg_step_slug) {
+					return $reg_step_completed;
+				}
+				// skip to next reg step in loop
+				continue;
+			}
+			// $check_all must be true, else we would never have gotten to this point
+			if ($slug === $reg_step_slug) {
+				// if we reach this point, then we are testing either:
+				// all_reg_steps_completed_except() or
+				// all_reg_steps_completed_except_final_step(),
+				// and since this is the reg step EXCEPTION being tested
+				// we want to return true (yes true) if this reg step is NOT completed
+				// ie: "is everything completed except the final step?"
+				// "that is correct... the final step is not completed, but all others are."
+				return $reg_step_completed !== true;
+			}
+			if ($reg_step_completed !== true) {
+				// if any reg step is NOT completed, then ALL steps are not completed
+				return false;
+			}
+		}
+		return true;
+	}
+
+
+	/**
+	 * all_reg_steps_completed
+	 * returns:
+	 *    true if ALL reg steps have been marked as completed
+	 *        or false if any step is not completed
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function all_reg_steps_completed()
+	{
+		return $this->_reg_steps_completed();
+	}
+
+
+	/**
+	 * all_reg_steps_completed_except
+	 * returns:
+	 *        true if ALL reg steps, except a particular step that you wish to skip over, have been marked as completed
+	 *        or false if any other step is not completed
+	 *        or false if ALL steps are completed including the exception you are testing !!!
+	 *
+	 * @param string $exception
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function all_reg_steps_completed_except($exception = '')
+	{
+		return $this->_reg_steps_completed($exception);
+	}
+
+
+	/**
+	 * all_reg_steps_completed_except
+	 * returns:
+	 *        true if ALL reg steps, except the final step, have been marked as completed
+	 *        or false if any step is not completed
+	 *    or false if ALL steps are completed including the final step !!!
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function all_reg_steps_completed_except_final_step()
+	{
+		return $this->_reg_steps_completed('finalize_registration');
+	}
+
+
+	/**
+	 * reg_step_completed
+	 * returns:
+	 *    true if a specific reg step has been marked as completed
+	 *    a Unix timestamp if it has been initialized but not yet completed,
+	 *    or false if it has not yet been initialized
+	 *
+	 * @param string $reg_step_slug
+	 * @return bool|int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function reg_step_completed($reg_step_slug)
+	{
+		return $this->_reg_steps_completed($reg_step_slug, false);
+	}
+
+
+	/**
+	 * completed_final_reg_step
+	 * returns:
+	 *    true if the finalize_registration reg step has been marked as completed
+	 *    a Unix timestamp if it has been initialized but not yet completed,
+	 *    or false if it has not yet been initialized
+	 *
+	 * @return bool|int
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function final_reg_step_completed()
+	{
+		return $this->_reg_steps_completed('finalize_registration', false);
+	}
+
+
+	/**
+	 * set_reg_step_initiated
+	 * given a valid TXN_reg_step, this sets it's value to a unix timestamp
+	 *
+	 * @param string $reg_step_slug
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_reg_step_initiated($reg_step_slug)
+	{
+		return $this->_set_reg_step_completed_status($reg_step_slug, time());
+	}
+
+
+	/**
+	 * set_reg_step_completed
+	 * given a valid TXN_reg_step, this sets the step as completed
+	 *
+	 * @param string $reg_step_slug
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_reg_step_completed($reg_step_slug)
+	{
+		return $this->_set_reg_step_completed_status($reg_step_slug, true);
+	}
+
+
+	/**
+	 * set_reg_step_completed
+	 * given a valid TXN_reg_step slug, this sets the step as NOT completed
+	 *
+	 * @param string $reg_step_slug
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function set_reg_step_not_completed($reg_step_slug)
+	{
+		return $this->_set_reg_step_completed_status($reg_step_slug, false);
+	}
+
+
+	/**
+	 * set_reg_step_completed
+	 * given a valid reg step slug, this sets the TXN_reg_step completed status which is either:
+	 *
+	 * @param string      $reg_step_slug
+	 * @param boolean|int $status
+	 * @return boolean
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _set_reg_step_completed_status($reg_step_slug, $status)
+	{
+		// validate status
+		$status = is_bool($status) || is_int($status) ? $status : false;
+		// get reg steps array
+		$txn_reg_steps = $this->reg_steps();
+		// if reg step does NOT exist
+		if (! isset($txn_reg_steps[ $reg_step_slug ])) {
+			return false;
+		}
+		// if  we're trying to complete a step that is already completed
+		if ($txn_reg_steps[ $reg_step_slug ] === true) {
+			return true;
+		}
+		// if  we're trying to complete a step that hasn't even started
+		if ($status === true && $txn_reg_steps[ $reg_step_slug ] === false) {
+			return false;
+		}
+		// if current status value matches the incoming value (no change)
+		// type casting as int means values should collapse to either 0, 1, or a timestamp like 1234567890
+		if ((int) $txn_reg_steps[ $reg_step_slug ] === (int) $status) {
+			// this will happen in cases where multiple AJAX requests occur during the same step
+			return true;
+		}
+		// if we're trying to set a start time, but it has already been set...
+		if (is_numeric($status) && is_numeric($txn_reg_steps[ $reg_step_slug ])) {
+			// skip the update below, but don't return FALSE so that errors won't be displayed
+			return true;
+		}
+		// update completed status
+		$txn_reg_steps[ $reg_step_slug ] = $status;
+		$this->set_reg_steps($txn_reg_steps);
+		$this->save();
+		return true;
+	}
+
+
+	/**
+	 * remove_reg_step
+	 * given a valid TXN_reg_step slug, this will remove (unset)
+	 * the reg step from the TXN reg step array
+	 *
+	 * @param string $reg_step_slug
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function remove_reg_step($reg_step_slug)
+	{
+		// get reg steps array
+		$txn_reg_steps = $this->reg_steps();
+		unset($txn_reg_steps[ $reg_step_slug ]);
+		$this->set_reg_steps($txn_reg_steps);
+	}
+
+
+	/**
+	 * toggle_failed_transaction_status
+	 * upgrades a TXNs status from failed to abandoned,
+	 * meaning that contact information has been captured for at least one registrant
+	 *
+	 * @param bool $save
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function toggle_failed_transaction_status($save = true)
+	{
+		// if TXN status is still set as "failed"...
+		if ($this->status_ID() === EEM_Transaction::failed_status_code) {
+			$this->set_status(EEM_Transaction::abandoned_status_code);
+			if ($save) {
+				$this->save();
+			}
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * toggle_abandoned_transaction_status
+	 * upgrades a TXNs status from failed or abandoned to incomplete
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function toggle_abandoned_transaction_status()
+	{
+		// if TXN status has not been updated already due to a payment, and is still set as "failed" or "abandoned"...
+		$txn_status = $this->status_ID();
+		if (
+			$txn_status === EEM_Transaction::failed_status_code
+			|| $txn_status === EEM_Transaction::abandoned_status_code
+		) {
+			// if a contact record for the primary registrant has been created
+			if (
+				$this->primary_registration() instanceof EE_Registration
+				&& $this->primary_registration()->attendee() instanceof EE_Attendee
+			) {
+				$this->set_status(EEM_Transaction::incomplete_status_code);
+			} else {
+				// no contact record? yer abandoned!
+				$this->set_status(EEM_Transaction::abandoned_status_code);
+			}
+			return true;
+		}
+		return false;
+	}
+
+
+	/**
+	 * checks if an Abandoned TXN has any related payments, and if so,
+	 * updates the TXN status based on the amount paid
+	 *
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws ReflectionException
+	 */
+	public function verify_abandoned_transaction_status()
+	{
+		if ($this->status_ID() !== EEM_Transaction::abandoned_status_code) {
+			return;
+		}
+		$payments = $this->get_many_related('Payment');
+		if (! empty($payments)) {
+			foreach ($payments as $payment) {
+				if ($payment instanceof EE_Payment) {
+					// kk this TXN should NOT be abandoned
+					$this->update_status_based_on_total_paid();
+					if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
+						EE_Error::add_attention(
+							sprintf(
+								esc_html__(
+									'The status for Transaction #%1$d has been updated from "Abandoned" to "%2$s", because at least one payment has been made towards it. If the payment appears in the "Payment Details" table below, you may need to edit its status and/or other details as well.',
+									'event_espresso'
+								),
+								$this->ID(),
+								$this->pretty_status()
+							)
+						);
+					}
+					// get final reg step status
+					$finalized = $this->final_reg_step_completed();
+					// if the 'finalize_registration' step has been initiated (has a timestamp)
+					// but has not yet been fully completed (TRUE)
+					if (is_int($finalized) && $finalized !== false && $finalized !== true) {
+						$this->set_reg_step_completed('finalize_registration');
+						$this->save();
+					}
+				}
+			}
+		}
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @since 4.10.4.p
+	 */
+	public function recalculateLineItems()
+	{
+		$total_line_item = $this->total_line_item(false);
+		if ($total_line_item instanceof EE_Line_Item) {
+			EEH_Line_Item::resetIsTaxableForTickets($total_line_item);
+			return EEH_Line_Item::apply_taxes($total_line_item, true);
+		}
+		return false;
+	}
 }

Spacing +23 added lines, -23 removed lines

@@ -46,7 +46,7 @@ 
         $txn        = $has_object
             ? $has_object
             : new self($props_n_values, false, $timezone, $date_formats);
-        if (! $has_object) {
+        if ( ! $has_object) {
             $txn->set_old_txn_status($txn->status_ID());
         }
         return $txn;
@@ -86,7 +86,7 @@ 
     public function lock()
     {
         // attempt to set lock, but if that fails...
-        if (! $this->add_extra_meta('lock', time(), true)) {
+        if ( ! $this->add_extra_meta('lock', time(), true)) {
             // then attempt to remove the lock in case it is expired
             if ($this->_remove_expired_lock()) {
                 // if removal was successful, then try setting lock again
@@ -142,7 +142,7 @@ 
     public function is_locked()
     {
         // if TXN is not locked, then return false immediately
-        if (! $this->_get_lock()) {
+        if ( ! $this->_get_lock()) {
             return false;
         }
         // if not, then let's try and remove the lock in case it's expired...
@@ -622,7 +622,7 @@ 
             false,
             'sentence'
         );
-        $icon   = '';
+        $icon = '';
         switch ($this->status_ID()) {
             case EEM_Transaction::complete_status_code:
                 $icon = $show_icons ? '<span class="dashicons dashicons-yes ee-icon-size-24 green-text"></span>' : '';
@@ -641,7 +641,7 @@ 
                 $icon = $show_icons ? '<span class="dashicons dashicons-plus ee-icon-size-16 orange-text"></span>' : '';
                 break;
         }
-        return $icon . $status[ $this->status_ID() ];
+        return $icon.$status[$this->status_ID()];
     }
 
 
@@ -779,7 +779,7 @@ 
     public function invoice_url($type = 'html')
     {
         $REG = $this->primary_registration();
-        if (! $REG instanceof EE_Registration) {
+        if ( ! $REG instanceof EE_Registration) {
             return '';
         }
         return $REG->invoice_url($type);
@@ -831,7 +831,7 @@ 
     public function receipt_url($type = 'html')
     {
         $REG = $this->primary_registration();
-        if (! $REG instanceof EE_Registration) {
+        if ( ! $REG instanceof EE_Registration) {
             return '';
         }
         return $REG->receipt_url($type);
@@ -1021,7 +1021,7 @@ 
     public function total_line_item($create_if_not_found = true)
     {
         $item = $this->get_first_related('Line_Item', [['LIN_type' => EEM_Line_Item::type_total]]);
-        if (! $item && $create_if_not_found) {
+        if ( ! $item && $create_if_not_found) {
             $item = EEH_Line_Item::create_total_line_item($this);
         }
         return $item;
@@ -1078,7 +1078,7 @@ 
     public function billing_info()
     {
         $payment_method = $this->payment_method();
-        if (! $payment_method) {
+        if ( ! $payment_method) {
             EE_Error::add_error(
                 esc_html__(
                     'Could not find billing info for transaction because no gateway has been used for it yet',
@@ -1091,7 +1091,7 @@ 
             return null;
         }
         $primary_reg = $this->primary_registration();
-        if (! $primary_reg) {
+        if ( ! $primary_reg) {
             EE_Error::add_error(
                 esc_html__(
                     'Cannot get billing info for gateway %s on transaction because no primary registration exists',
@@ -1104,7 +1104,7 @@ 
             return null;
         }
         $attendee = $primary_reg->attendee();
-        if (! $attendee) {
+        if ( ! $attendee) {
             EE_Error::add_error(
                 esc_html__(
                     'Cannot get billing info for gateway %s on transaction because the primary registration has no attendee exists',
@@ -1261,7 +1261,7 @@ 
     public function update_based_on_payments()
     {
         EE_Error::doing_it_wrong(
-            __CLASS__ . '::' . __FUNCTION__,
+            __CLASS__.'::'.__FUNCTION__,
             sprintf(
                 esc_html__('This method is deprecated. Please use "%s" instead', 'event_espresso'),
                 'EE_Transaction_Processor::update_transaction_and_registrations_after_checkout_or_payment()'
@@ -1329,13 +1329,13 @@ 
     private function _reg_steps_completed($reg_step_slug = '', $check_all = true)
     {
         $reg_steps = $this->reg_steps();
-        if (! is_array($reg_steps) || empty($reg_steps)) {
+        if ( ! is_array($reg_steps) || empty($reg_steps)) {
             return false;
         }
         // loop thru reg steps array)
         foreach ($reg_steps as $slug => $reg_step_completed) {
             // if NOT checking ALL steps (only checking one step)
-            if (! $check_all) {
+            if ( ! $check_all) {
                 // and this is the one
                 if ($slug === $reg_step_slug) {
                     return $reg_step_completed;
@@ -1538,30 +1538,30 @@ 
         // get reg steps array
         $txn_reg_steps = $this->reg_steps();
         // if reg step does NOT exist
-        if (! isset($txn_reg_steps[ $reg_step_slug ])) {
+        if ( ! isset($txn_reg_steps[$reg_step_slug])) {
             return false;
         }
         // if  we're trying to complete a step that is already completed
-        if ($txn_reg_steps[ $reg_step_slug ] === true) {
+        if ($txn_reg_steps[$reg_step_slug] === true) {
             return true;
         }
         // if  we're trying to complete a step that hasn't even started
-        if ($status === true && $txn_reg_steps[ $reg_step_slug ] === false) {
+        if ($status === true && $txn_reg_steps[$reg_step_slug] === false) {
             return false;
         }
         // if current status value matches the incoming value (no change)
         // type casting as int means values should collapse to either 0, 1, or a timestamp like 1234567890
-        if ((int) $txn_reg_steps[ $reg_step_slug ] === (int) $status) {
+        if ((int) $txn_reg_steps[$reg_step_slug] === (int) $status) {
             // this will happen in cases where multiple AJAX requests occur during the same step
             return true;
         }
         // if we're trying to set a start time, but it has already been set...
-        if (is_numeric($status) && is_numeric($txn_reg_steps[ $reg_step_slug ])) {
+        if (is_numeric($status) && is_numeric($txn_reg_steps[$reg_step_slug])) {
             // skip the update below, but don't return FALSE so that errors won't be displayed
             return true;
         }
         // update completed status
-        $txn_reg_steps[ $reg_step_slug ] = $status;
+        $txn_reg_steps[$reg_step_slug] = $status;
         $this->set_reg_steps($txn_reg_steps);
         $this->save();
         return true;
@@ -1585,7 +1585,7 @@ 
     {
         // get reg steps array
         $txn_reg_steps = $this->reg_steps();
-        unset($txn_reg_steps[ $reg_step_slug ]);
+        unset($txn_reg_steps[$reg_step_slug]);
         $this->set_reg_steps($txn_reg_steps);
     }
 
@@ -1670,12 +1670,12 @@ 
             return;
         }
         $payments = $this->get_many_related('Payment');
-        if (! empty($payments)) {
+        if ( ! empty($payments)) {
             foreach ($payments as $payment) {
                 if ($payment instanceof EE_Payment) {
                     // kk this TXN should NOT be abandoned
                     $this->update_status_based_on_total_paid();
-                    if (! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
+                    if ( ! (defined('DOING_AJAX') && DOING_AJAX) && is_admin()) {
                         EE_Error::add_attention(
                             sprintf(
                                 esc_html__(

core/db_classes/EE_Soft_Delete_Base_Class.class.php

Indentation +51 added lines, -51 removed lines

@@ -11,59 +11,59 @@
  */
 abstract class EE_Soft_Delete_Base_Class extends EE_Base_Class
 {
-    /**
-     * Overrides parent _delete() so that we do soft deletes.
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    protected function _delete()
-    {
-        return $this->delete_or_restore();
-    }
+	/**
+	 * Overrides parent _delete() so that we do soft deletes.
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	protected function _delete()
+	{
+		return $this->delete_or_restore();
+	}
 
 
-    /**
-     * Deletes or restores this object.
-     *
-     * @param bool $delete true=>delete, false=>restore
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function delete_or_restore($delete = true)
-    {
-        /**
-         * Called just before trashing (soft delete) or restoring a trashed item.
-         *
-         * @param EE_Base_Class $model_object about to be trashed or restored
-         * @param bool          $delete       true the item is being trashed, false the item is being restored.
-         */
-        do_action('AHEE__EE_Soft_Delete_Base_Class__delete_or_restore__before', $this, $delete);
-        $model = $this->get_model();
-        $result = $model->delete_or_restore_by_ID($delete, $this->ID());
-        /**
-         * Called just after trashing (soft delete) or restoring a trashed item.
-         *
-         * @param EE_Base_Class $model_object that was just trashed or restored.
-         * @param bool          $delete       true the item is being trashed, false the item is being restored.
-         * @param bool|int      $result
-         */
-        do_action('AHEE__EE_Soft_Delete_Base_Class__delete_or_restore__after', $this, $delete, $result);
-        return $result;
-    }
+	/**
+	 * Deletes or restores this object.
+	 *
+	 * @param bool $delete true=>delete, false=>restore
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function delete_or_restore($delete = true)
+	{
+		/**
+		 * Called just before trashing (soft delete) or restoring a trashed item.
+		 *
+		 * @param EE_Base_Class $model_object about to be trashed or restored
+		 * @param bool          $delete       true the item is being trashed, false the item is being restored.
+		 */
+		do_action('AHEE__EE_Soft_Delete_Base_Class__delete_or_restore__before', $this, $delete);
+		$model = $this->get_model();
+		$result = $model->delete_or_restore_by_ID($delete, $this->ID());
+		/**
+		 * Called just after trashing (soft delete) or restoring a trashed item.
+		 *
+		 * @param EE_Base_Class $model_object that was just trashed or restored.
+		 * @param bool          $delete       true the item is being trashed, false the item is being restored.
+		 * @param bool|int      $result
+		 */
+		do_action('AHEE__EE_Soft_Delete_Base_Class__delete_or_restore__after', $this, $delete, $result);
+		return $result;
+	}
 
 
-    /**
-     * Performs a restoration (un-deletes) this object
-     *
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function restore()
-    {
-        return $this->delete_or_restore(false);
-    }
+	/**
+	 * Performs a restoration (un-deletes) this object
+	 *
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function restore()
+	{
+		return $this->delete_or_restore(false);
+	}
 }

core/db_models/EEM_Price_Type.model.php

Indentation +124 added lines, -124 removed lines

@@ -11,142 +11,142 @@
  */
 class EEM_Price_Type extends EEM_Soft_Delete_Base
 {
-    // private instance of the Price Type object
-    protected static $_instance = null;
-    // An array of the price type objects
-    public $type = null;
+	// private instance of the Price Type object
+	protected static $_instance = null;
+	// An array of the price type objects
+	public $type = null;
 
-    /**
-    *   Price Base types
-    *
-    *   @access private
-    *   @var int
-    */
-    public $base_types = null;
+	/**
+	 *   Price Base types
+	 *
+	 *   @access private
+	 *   @var int
+	 */
+	public $base_types = null;
 
-    /**
-     * return an array of Base types. Keys are INTs which are used in the database,
-     * values are text-representations of the base type.
-     * @return array
-     */
-    public function get_base_types()
-    {
-        return $this->base_types;
-    }
+	/**
+	 * return an array of Base types. Keys are INTs which are used in the database,
+	 * values are text-representations of the base type.
+	 * @return array
+	 */
+	public function get_base_types()
+	{
+		return $this->base_types;
+	}
 
-    /**
-     * Gets the name of the base
-     * @param type $base_type_int
-     * @return type
-     */
-    public function get_base_type_name($base_type_int)
-    {
-        return $this->base_types[ $base_type_int ];
-    }
+	/**
+	 * Gets the name of the base
+	 * @param type $base_type_int
+	 * @return type
+	 */
+	public function get_base_type_name($base_type_int)
+	{
+		return $this->base_types[ $base_type_int ];
+	}
 
-    /**
-     * constants for price base types. In the DB, we decided to store the price base type
-     * as an integer. So, to avoid just having magic numbers everwhere (eg, querying for
-     * all price types with PBT_ID = 2), we define these constants, to make code more understandable.
-     * So, as an example, to query for all price types that are a tax, we'd do
-     * EEM_PRice_Type::instance()->get_all(array(array('PBT_ID'=>EEM_Price_Type::base_type_tax)))
-     * instead of
-     * EEM_Price_Type::instance()->get_all(array(array('PBT_ID'=>2)))
-     * Although the 2nd is shorter, it's much less obvious what it's doing. Also, should these magic IDs ever
-     * change, we can continue to use the constant, by simply change its value.
-     */
-    const base_type_base_price = 1;
-    const base_type_discount = 2;
-    const base_type_surcharge = 3;
-    const base_type_tax = 4;
-    /**
-     *      private constructor to prevent direct creation
-     *      @Constructor
-     *      @access protected
-     *      @return void
-     */
-    protected function __construct($timezone = null)
-    {
-        $this->base_types = array(
-            EEM_Price_Type::base_type_base_price => esc_html__('Price', 'event_espresso'),
-            EEM_Price_Type::base_type_discount => esc_html__('Discount', 'event_espresso'),
-            EEM_Price_Type::base_type_surcharge => esc_html__('Surcharge', 'event_espresso'),
-            EEM_Price_Type::base_type_tax => esc_html__('Tax', 'event_espresso') );
-        $this->singular_item = esc_html__('Price Type', 'event_espresso');
-        $this->plural_item = esc_html__('Price Types', 'event_espresso');
+	/**
+	 * constants for price base types. In the DB, we decided to store the price base type
+	 * as an integer. So, to avoid just having magic numbers everwhere (eg, querying for
+	 * all price types with PBT_ID = 2), we define these constants, to make code more understandable.
+	 * So, as an example, to query for all price types that are a tax, we'd do
+	 * EEM_PRice_Type::instance()->get_all(array(array('PBT_ID'=>EEM_Price_Type::base_type_tax)))
+	 * instead of
+	 * EEM_Price_Type::instance()->get_all(array(array('PBT_ID'=>2)))
+	 * Although the 2nd is shorter, it's much less obvious what it's doing. Also, should these magic IDs ever
+	 * change, we can continue to use the constant, by simply change its value.
+	 */
+	const base_type_base_price = 1;
+	const base_type_discount = 2;
+	const base_type_surcharge = 3;
+	const base_type_tax = 4;
+	/**
+	 *      private constructor to prevent direct creation
+	 *      @Constructor
+	 *      @access protected
+	 *      @return void
+	 */
+	protected function __construct($timezone = null)
+	{
+		$this->base_types = array(
+			EEM_Price_Type::base_type_base_price => esc_html__('Price', 'event_espresso'),
+			EEM_Price_Type::base_type_discount => esc_html__('Discount', 'event_espresso'),
+			EEM_Price_Type::base_type_surcharge => esc_html__('Surcharge', 'event_espresso'),
+			EEM_Price_Type::base_type_tax => esc_html__('Tax', 'event_espresso') );
+		$this->singular_item = esc_html__('Price Type', 'event_espresso');
+		$this->plural_item = esc_html__('Price Types', 'event_espresso');
 
-        $this->_tables = array(
-            'Price_Type' => new EE_Primary_Table('esp_price_type', 'PRT_ID')
-        );
-        $this->_fields = array(
-            'Price_Type' => array(
-                'PRT_ID' => new EE_Primary_Key_Int_Field('PRT_ID', esc_html__('Price Type ID', 'event_espresso')),
-                'PRT_name' => new EE_Plain_Text_Field('PRT_name', esc_html__('Price Type Name', 'event_espresso'), false, ''),
-                'PBT_ID' => new EE_Enum_Integer_Field('PBT_ID', esc_html__('Price Base type ID, 1 = Price , 2 = Discount , 3 = Surcharge , 4 = Tax', 'event_espresso'), false, EEM_Price_Type::base_type_base_price, $this->base_types),
-                'PRT_is_percent' => new EE_Boolean_Field('PRT_is_percent', esc_html__('Flag indicating price is a percentage', 'event_espresso'), false, false),
-                'PRT_order' => new EE_Integer_Field('PRT_order', esc_html__('Order in which price should be applied. ', 'event_espresso'), false, 0),
-                'PRT_deleted' => new EE_Trashed_Flag_Field('PRT_deleted', esc_html__('Flag indicating price type has been trashed', 'event_espresso'), false, false),
-                'PRT_wp_user' => new EE_WP_User_Field('PRT_wp_user', esc_html__('Price Type Creator ID', 'event_espresso'), false),
-            )
-        );
-        $this->_model_relations = array(
-            'Price' => new EE_Has_Many_Relation(),
-            'WP_User' => new EE_Belongs_To_Relation(),
-        );
-        // this model is generally available for reading
-        $this->_cap_restriction_generators[ EEM_Base::caps_read ] = new EE_Restriction_Generator_Public();
-        // all price types are "default" in terms of capability names
-        $this->_caps_slug = 'default_price_types';
-        parent::__construct($timezone);
-    }
+		$this->_tables = array(
+			'Price_Type' => new EE_Primary_Table('esp_price_type', 'PRT_ID')
+		);
+		$this->_fields = array(
+			'Price_Type' => array(
+				'PRT_ID' => new EE_Primary_Key_Int_Field('PRT_ID', esc_html__('Price Type ID', 'event_espresso')),
+				'PRT_name' => new EE_Plain_Text_Field('PRT_name', esc_html__('Price Type Name', 'event_espresso'), false, ''),
+				'PBT_ID' => new EE_Enum_Integer_Field('PBT_ID', esc_html__('Price Base type ID, 1 = Price , 2 = Discount , 3 = Surcharge , 4 = Tax', 'event_espresso'), false, EEM_Price_Type::base_type_base_price, $this->base_types),
+				'PRT_is_percent' => new EE_Boolean_Field('PRT_is_percent', esc_html__('Flag indicating price is a percentage', 'event_espresso'), false, false),
+				'PRT_order' => new EE_Integer_Field('PRT_order', esc_html__('Order in which price should be applied. ', 'event_espresso'), false, 0),
+				'PRT_deleted' => new EE_Trashed_Flag_Field('PRT_deleted', esc_html__('Flag indicating price type has been trashed', 'event_espresso'), false, false),
+				'PRT_wp_user' => new EE_WP_User_Field('PRT_wp_user', esc_html__('Price Type Creator ID', 'event_espresso'), false),
+			)
+		);
+		$this->_model_relations = array(
+			'Price' => new EE_Has_Many_Relation(),
+			'WP_User' => new EE_Belongs_To_Relation(),
+		);
+		// this model is generally available for reading
+		$this->_cap_restriction_generators[ EEM_Base::caps_read ] = new EE_Restriction_Generator_Public();
+		// all price types are "default" in terms of capability names
+		$this->_caps_slug = 'default_price_types';
+		parent::__construct($timezone);
+	}
 
 
 
 
-    /**
-     *      instantiate a new price type object with blank/empty properties
-     *
-     *      @access     public
-     *      @return     mixed       array on success, FALSE on fail
-     */
-    public function get_new_price_type()
-    {
-        return EE_Price_Type::new_instance();
-    }
+	/**
+	 *      instantiate a new price type object with blank/empty properties
+	 *
+	 *      @access     public
+	 *      @return     mixed       array on success, FALSE on fail
+	 */
+	public function get_new_price_type()
+	{
+		return EE_Price_Type::new_instance();
+	}
 
 
-    /**
-     *
-     * @param array   $query_params
-     * @param bool    $allow_blocking if TRUE, matched objects will only be deleted if there is no related model info
-     *                                that blocks it (ie, there' sno other data that depends on this data);
-     *                                if false, deletes regardless of other objects which may depend on it.
-     *                                Its generally advisable to always leave this as TRUE,
-     *                                otherwise you could easily corrupt your DB
-     * @return bool
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function delete_permanently($query_params = array(), $allow_blocking = true)
-    {
-        $would_be_deleted_price_types = $this->get_all_deleted_and_undeleted($query_params);
-        $would_be_deleted_price_type_ids = array_keys($would_be_deleted_price_types);
+	/**
+	 *
+	 * @param array   $query_params
+	 * @param bool    $allow_blocking if TRUE, matched objects will only be deleted if there is no related model info
+	 *                                that blocks it (ie, there' sno other data that depends on this data);
+	 *                                if false, deletes regardless of other objects which may depend on it.
+	 *                                Its generally advisable to always leave this as TRUE,
+	 *                                otherwise you could easily corrupt your DB
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function delete_permanently($query_params = array(), $allow_blocking = true)
+	{
+		$would_be_deleted_price_types = $this->get_all_deleted_and_undeleted($query_params);
+		$would_be_deleted_price_type_ids = array_keys($would_be_deleted_price_types);
 
-        $ID = $query_params[0][ $this->get_primary_key_field()->get_name() ];
+		$ID = $query_params[0][ $this->get_primary_key_field()->get_name() ];
 
-        // check if any prices use this price type
-        $prc_query_params = array(array('PRT_ID' => array('IN',$would_be_deleted_price_type_ids)));
-        if ($prices = $this->get_all_related($ID, 'Price', $prc_query_params)) {
-            $prices_names_and_ids = array();
-            foreach ($prices as $price) {
-                /* @var $price EE_Price */
-                $prices_names_and_ids[] = $price->name() . "(" . $price->ID() . ")";
-            }
-            $msg = sprintf(esc_html__('The Price Type(s) could not be deleted because there are existing Prices that currently use this Price Type.  If you still wish to delete this Price Type, then either delete those Prices or change them to use other Price Types.The prices are: %s', 'event_espresso'), implode(",", $prices_names_and_ids));
-            EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
-            return false;
-        }
+		// check if any prices use this price type
+		$prc_query_params = array(array('PRT_ID' => array('IN',$would_be_deleted_price_type_ids)));
+		if ($prices = $this->get_all_related($ID, 'Price', $prc_query_params)) {
+			$prices_names_and_ids = array();
+			foreach ($prices as $price) {
+				/* @var $price EE_Price */
+				$prices_names_and_ids[] = $price->name() . "(" . $price->ID() . ")";
+			}
+			$msg = sprintf(esc_html__('The Price Type(s) could not be deleted because there are existing Prices that currently use this Price Type.  If you still wish to delete this Price Type, then either delete those Prices or change them to use other Price Types.The prices are: %s', 'event_espresso'), implode(",", $prices_names_and_ids));
+			EE_Error::add_error($msg, __FILE__, __FUNCTION__, __LINE__);
+			return false;
+		}
 
-        return parent::delete_permanently($query_params);
-    }
+		return parent::delete_permanently($query_params);
+	}
 }