eventespresso / event-espresso-core

admin_pages/transactions/Transactions_Admin_Page.core.php

Indentation +2521 added lines, -2521 removed lines

@@ -13,2525 +13,2525 @@
 class Transactions_Admin_Page extends EE_Admin_Page
 {
 
-    /**
-     * @var EE_Transaction
-     */
-    private $_transaction;
-
-    /**
-     * @var EE_Session
-     */
-    private $_session;
-
-    /**
-     * @var array $_txn_status
-     */
-    private static $_txn_status;
-
-    /**
-     * @var array $_pay_status
-     */
-    private static $_pay_status;
-
-    /**
-     * @var array $_existing_reg_payment_REG_IDs
-     */
-    protected $_existing_reg_payment_REG_IDs;
-
-
-    /**
-     *    _init_page_props
-     *
-     * @return void
-     */
-    protected function _init_page_props()
-    {
-        $this->page_slug        = TXN_PG_SLUG;
-        $this->page_label       = esc_html__('Transactions', 'event_espresso');
-        $this->_admin_base_url  = TXN_ADMIN_URL;
-        $this->_admin_base_path = TXN_ADMIN;
-    }
-
-
-    /**
-     *    _ajax_hooks
-     *
-     * @return void
-     */
-    protected function _ajax_hooks()
-    {
-        add_action('wp_ajax_espresso_apply_payment', [$this, 'apply_payments_or_refunds']);
-        add_action('wp_ajax_espresso_apply_refund', [$this, 'apply_payments_or_refunds']);
-        add_action('wp_ajax_espresso_delete_payment', [$this, 'delete_payment']);
-    }
-
-
-    /**
-     *    _define_page_props
-     *
-     * @return void
-     */
-    protected function _define_page_props()
-    {
-        $this->_admin_page_title = $this->page_label;
-        $this->_labels           = [
-            'buttons' => [
-                'add'    => esc_html__('Add New Transaction', 'event_espresso'),
-                'edit'   => esc_html__('Edit Transaction', 'event_espresso'),
-                'delete' => esc_html__('Delete Transaction', 'event_espresso'),
-            ],
-        ];
-    }
-
-
-    /**
-     *        grab url requests and route them
-     *
-     * @access private
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function _set_page_routes()
-    {
-
-        $this->_set_transaction_status_array();
-        $TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
-
-        $this->_page_routes = [
-
-            'default' => [
-                'func'       => '_transactions_overview_list_table',
-                'capability' => 'ee_read_transactions',
-            ],
-
-            'view_transaction' => [
-                'func'       => '_transaction_details',
-                'capability' => 'ee_read_transaction',
-                'obj_id'     => $TXN_ID,
-            ],
-
-            'send_payment_reminder' => [
-                'func'       => '_send_payment_reminder',
-                'noheader'   => true,
-                'capability' => 'ee_send_message',
-            ],
-
-            'espresso_apply_payment' => [
-                'func'       => 'apply_payments_or_refunds',
-                'noheader'   => true,
-                'capability' => 'ee_edit_payments',
-            ],
-
-            'espresso_apply_refund' => [
-                'func'       => 'apply_payments_or_refunds',
-                'noheader'   => true,
-                'capability' => 'ee_edit_payments',
-            ],
-
-            'espresso_delete_payment' => [
-                'func'       => 'delete_payment',
-                'noheader'   => true,
-                'capability' => 'ee_delete_payments',
-            ],
-
-            'espresso_recalculate_line_items' => [
-                'func'       => 'recalculateLineItems',
-                'noheader'   => true,
-                'capability' => 'ee_edit_payments',
-            ],
-
-        ];
-    }
-
-
-    protected function _set_page_config()
-    {
-        $TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
-        $this->_page_config = [
-            'default'          => [
-                'nav'           => [
-                    'label' => esc_html__('Overview', 'event_espresso'),
-                    'order' => 10,
-                ],
-                'list_table'    => 'EE_Admin_Transactions_List_Table',
-                'help_tabs'     => [
-                    'transactions_overview_help_tab'                       => [
-                        'title'    => esc_html__('Transactions Overview', 'event_espresso'),
-                        'filename' => 'transactions_overview',
-                    ],
-                    'transactions_overview_table_column_headings_help_tab' => [
-                        'title'    => esc_html__('Transactions Table Column Headings', 'event_espresso'),
-                        'filename' => 'transactions_overview_table_column_headings',
-                    ],
-                    'transactions_overview_views_filters_help_tab'         => [
-                        'title'    => esc_html__('Transaction Views & Filters & Search', 'event_espresso'),
-                        'filename' => 'transactions_overview_views_filters_search',
-                    ],
-                ],
-                /**
-                 * commented out because currently we are not displaying tips for transaction list table status but this
-                 * may change in a later iteration so want to keep the code for then.
-                 */
-                // 'qtips' => array( 'Transactions_List_Table_Tips' ),
-                'require_nonce' => false,
-            ],
-            'view_transaction' => [
-                'nav'       => [
-                    'label'      => esc_html__('View Transaction', 'event_espresso'),
-                    'order'      => 5,
-                    'url'        => $TXN_ID
-                        ? add_query_arg(['TXN_ID' => $TXN_ID], $this->_current_page_view_url)
-                        : $this->_admin_base_url,
-                    'persistent' => false,
-                ],
-                'help_tabs' => [
-                    'transactions_view_transaction_help_tab'                                              => [
-                        'title'    => esc_html__('View Transaction', 'event_espresso'),
-                        'filename' => 'transactions_view_transaction',
-                    ],
-                    'transactions_view_transaction_transaction_details_table_help_tab'                    => [
-                        'title'    => esc_html__('Transaction Details Table', 'event_espresso'),
-                        'filename' => 'transactions_view_transaction_transaction_details_table',
-                    ],
-                    'transactions_view_transaction_attendees_registered_help_tab'                         => [
-                        'title'    => esc_html__('Attendees Registered', 'event_espresso'),
-                        'filename' => 'transactions_view_transaction_attendees_registered',
-                    ],
-                    'transactions_view_transaction_views_primary_registrant_billing_information_help_tab' => [
-                        'title'    => esc_html__('Primary Registrant & Billing Information', 'event_espresso'),
-                        'filename' => 'transactions_view_transaction_primary_registrant_billing_information',
-                    ],
-                ],
-                'qtips'     => ['Transaction_Details_Tips'],
-                'metaboxes' => ['_transaction_details_metaboxes'],
-
-                'require_nonce' => false,
-            ],
-        ];
-    }
-
-
-    /**
-     * The below methods aren't used by this class currently
-     */
-    protected function _add_screen_options()
-    {
-        // noop
-    }
-
-
-    protected function _add_feature_pointers()
-    {
-        // noop
-    }
-
-
-    public function admin_init()
-    {
-        $EVT_ID = $this->request->getRequestParam('EVT_ID', 0, 'int');
-        $event_name = $this->request->getRequestParam('event_name');
-        $redirect_from = $this->request->getRequestParam('redirect_from', '', 'url');
-        // IF a registration was JUST added via the admin...
-        if ($EVT_ID && $event_name && $redirect_from) {
-            // then set a cookie so that we can block any attempts to use
-            // the back button as a way to enter another registration.
-            setcookie('ee_registration_added', $EVT_ID, time() + WEEK_IN_SECONDS, '/');
-            // and update the global
-            $_COOKIE['ee_registration_added'] = $EVT_ID;
-        }
-        EE_Registry::$i18n_js_strings['invalid_server_response'] = esc_html__(
-            'An error occurred! Your request may have been processed, but a valid response from the server was not received. Please refresh the page and try again.',
-            'event_espresso'
-        );
-        EE_Registry::$i18n_js_strings['error_occurred']          = esc_html__(
-            'An error occurred! Please refresh the page and try again.',
-            'event_espresso'
-        );
-        EE_Registry::$i18n_js_strings['txn_status_array']        = self::$_txn_status;
-        EE_Registry::$i18n_js_strings['pay_status_array']        = self::$_pay_status;
-        EE_Registry::$i18n_js_strings['payments_total']          = esc_html__('Payments Total', 'event_espresso');
-        EE_Registry::$i18n_js_strings['transaction_overpaid']    = esc_html__(
-            'This transaction has been overpaid ! Payments Total',
-            'event_espresso'
-        );
-    }
-
-
-    public function admin_notices()
-    {
-        // noop
-    }
-
-
-    public function admin_footer_scripts()
-    {
-        // noop
-    }
-
-
-    /**
-     * _set_transaction_status_array
-     * sets list of transaction statuses
-     *
-     * @access private
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _set_transaction_status_array()
-    {
-        self::$_txn_status = EEM_Transaction::instance()->status_array(true);
-    }
-
-
-    /**
-     * get_transaction_status_array
-     * return the transaction status array for wp_list_table
-     *
-     * @access public
-     * @return array
-     */
-    public function get_transaction_status_array()
-    {
-        return self::$_txn_status;
-    }
-
-
-    /**
-     *    get list of payment statuses
-     *
-     * @access private
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    private function _get_payment_status_array()
-    {
-        self::$_pay_status                      = EEM_Payment::instance()->status_array(true);
-        $this->_template_args['payment_status'] = self::$_pay_status;
-    }
-
-
-    /**
-     *    _add_screen_options_default
-     *
-     * @access protected
-     * @return void
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _add_screen_options_default()
-    {
-        $this->_per_page_screen_option();
-    }
-
-
-    /**
-     * load_scripts_styles
-     *
-     * @access public
-     * @return void
-     */
-    public function load_scripts_styles()
-    {
-        // enqueue style
-        wp_register_style(
-            'espresso_txn',
-            TXN_ASSETS_URL . 'espresso_transactions_admin.css',
-            [],
-            EVENT_ESPRESSO_VERSION
-        );
-        wp_enqueue_style('espresso_txn');
-        // scripts
-        wp_register_script(
-            'espresso_txn',
-            TXN_ASSETS_URL . 'espresso_transactions_admin.js',
-            [
-                'ee_admin_js',
-                'ee-datepicker',
-                'jquery-ui-datepicker',
-                'jquery-ui-draggable',
-                'ee-dialog',
-                'ee-accounting',
-                'ee-serialize-full-array',
-            ],
-            EVENT_ESPRESSO_VERSION,
-            true
-        );
-        wp_enqueue_script('espresso_txn');
-    }
-
-
-    /**
-     *    load_scripts_styles_view_transaction
-     *
-     * @access public
-     * @return void
-     */
-    public function load_scripts_styles_view_transaction()
-    {
-        // styles
-        wp_enqueue_style('espresso-ui-theme');
-    }
-
-
-    /**
-     *    load_scripts_styles_default
-     *
-     * @access public
-     * @return void
-     */
-    public function load_scripts_styles_default()
-    {
-        // styles
-        wp_enqueue_style('espresso-ui-theme');
-    }
-
-
-    /**
-     *    _set_list_table_views_default
-     *
-     * @access protected
-     * @return void
-     */
-    protected function _set_list_table_views_default()
-    {
-        $this->_views = [
-            'all'        => [
-                'slug'  => 'all',
-                'label' => esc_html__('View All Transactions', 'event_espresso'),
-                'count' => 0,
-            ],
-            'abandoned'  => [
-                'slug'  => 'abandoned',
-                'label' => esc_html__('Abandoned Transactions', 'event_espresso'),
-                'count' => 0,
-            ],
-            'incomplete' => [
-                'slug'  => 'incomplete',
-                'label' => esc_html__('Incomplete Transactions', 'event_espresso'),
-                'count' => 0,
-            ],
-        ];
-        if (
-            /**
-             * Filters whether a link to the "Failed Transactions" list table
-             * appears on the Transactions Admin Page list table.
-             * List display can be turned back on via the following:
-             * add_filter(
-             *     'FHEE__Transactions_Admin_Page___set_list_table_views_default__display_failed_txns_list',
-             *     '__return_true'
-             * );
-             *
-             * @param boolean                 $display_failed_txns_list
-             * @param Transactions_Admin_Page $this
-             * @since 4.9.70.p
-             */
-            apply_filters(
-                'FHEE__Transactions_Admin_Page___set_list_table_views_default__display_failed_txns_list',
-                false,
-                $this
-            )
-        ) {
-            $this->_views['failed'] = [
-                'slug'  => 'failed',
-                'label' => esc_html__('Failed Transactions', 'event_espresso'),
-                'count' => 0,
-            ];
-        }
-    }
-
-
-    /**
-     * _set_transaction_object
-     * This sets the _transaction property for the transaction details screen
-     *
-     * @access private
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws RuntimeException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _set_transaction_object()
-    {
-        if ($this->_transaction instanceof EE_Transaction) {
-            return;
-        } //get out we've already set the object
-
-        $TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
-
-        // get transaction object
-        $this->_transaction = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
-        $this->_session     = $this->_transaction instanceof EE_Transaction
-            ? $this->_transaction->session_data()
-            : null;
-        if ($this->_transaction instanceof EE_Transaction) {
-            $this->_transaction->verify_abandoned_transaction_status();
-        }
-
-        if (! $this->_transaction instanceof EE_Transaction) {
-            $error_msg = sprintf(
-                esc_html__(
-                    'An error occurred and the details for the transaction with the ID # %d could not be retrieved.',
-                    'event_espresso'
-                ),
-                $TXN_ID
-            );
-            EE_Error::add_error($error_msg, __FILE__, __FUNCTION__, __LINE__);
-        }
-    }
-
-
-    /**
-     *    _transaction_legend_items
-     *
-     * @access protected
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _transaction_legend_items()
-    {
-        EE_Registry::instance()->load_helper('MSG_Template');
-        $items = [];
-
-        if (
-            EE_Registry::instance()->CAP->current_user_can(
-                'ee_read_global_messages',
-                'view_filtered_messages'
-            )
-        ) {
-            $related_for_icon = EEH_MSG_Template::get_message_action_icon('see_notifications_for');
-            if (
-                is_array($related_for_icon)
-                && isset($related_for_icon['css_class'], $related_for_icon['label'])
-            ) {
-                $items['view_related_messages'] = [
-                    'class' => $related_for_icon['css_class'],
-                    'desc'  => $related_for_icon['label'],
-                ];
-            }
-        }
-
-        $items = apply_filters(
-            'FHEE__Transactions_Admin_Page___transaction_legend_items__items',
-            array_merge(
-                $items,
-                [
-                    'view_details'          => [
-                        'class' => 'dashicons dashicons-cart',
-                        'desc'  => esc_html__('View Transaction Details', 'event_espresso'),
-                    ],
-                    'view_invoice'          => [
-                        'class' => 'dashicons dashicons-media-spreadsheet',
-                        'desc'  => esc_html__('View Transaction Invoice', 'event_espresso'),
-                    ],
-                    'view_receipt'          => [
-                        'class' => 'dashicons dashicons-media-default',
-                        'desc'  => esc_html__('View Transaction Receipt', 'event_espresso'),
-                    ],
-                    'view_registration'     => [
-                        'class' => 'dashicons dashicons-clipboard',
-                        'desc'  => esc_html__('View Registration Details', 'event_espresso'),
-                    ],
-                    'payment_overview_link' => [
-                        'class' => 'dashicons dashicons-money',
-                        'desc'  => esc_html__('Make Payment on Frontend', 'event_espresso'),
-                    ],
-                ]
-            )
-        );
-
-        if (
-            EEH_MSG_Template::is_mt_active('payment_reminder')
-            && EE_Registry::instance()->CAP->current_user_can(
-                'ee_send_message',
-                'espresso_transactions_send_payment_reminder'
-            )
-        ) {
-            $items['send_payment_reminder'] = [
-                'class' => 'dashicons dashicons-email-alt',
-                'desc'  => esc_html__('Send Payment Reminder', 'event_espresso'),
-            ];
-        } else {
-            $items['blank*'] = [
-                'class' => '',
-                'desc'  => '',
-            ];
-        }
-        $more_items = apply_filters(
-            'FHEE__Transactions_Admin_Page___transaction_legend_items__more_items',
-            [
-                'overpaid'   => [
-                    'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::overpaid_status_code,
-                    'desc'  => EEH_Template::pretty_status(
-                        EEM_Transaction::overpaid_status_code,
-                        false,
-                        'sentence'
-                    ),
-                ],
-                'complete'   => [
-                    'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::complete_status_code,
-                    'desc'  => EEH_Template::pretty_status(
-                        EEM_Transaction::complete_status_code,
-                        false,
-                        'sentence'
-                    ),
-                ],
-                'incomplete' => [
-                    'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::incomplete_status_code,
-                    'desc'  => EEH_Template::pretty_status(
-                        EEM_Transaction::incomplete_status_code,
-                        false,
-                        'sentence'
-                    ),
-                ],
-                'abandoned'  => [
-                    'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::abandoned_status_code,
-                    'desc'  => EEH_Template::pretty_status(
-                        EEM_Transaction::abandoned_status_code,
-                        false,
-                        'sentence'
-                    ),
-                ],
-                'failed'     => [
-                    'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::failed_status_code,
-                    'desc'  => EEH_Template::pretty_status(
-                        EEM_Transaction::failed_status_code,
-                        false,
-                        'sentence'
-                    ),
-                ],
-            ]
-        );
-
-        return array_merge($items, $more_items);
-    }
-
-
-    /**
-     *    _transactions_overview_list_table
-     *
-     * @access protected
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _transactions_overview_list_table()
-    {
-        $this->_admin_page_title = esc_html__('Transactions', 'event_espresso');
-
-        $EVT_ID = $this->request->getRequestParam('EVT_ID', 0, 'int');
-        $event = EEM_Event::instance()->get_one_by_ID($EVT_ID);
-        $this->_template_args['admin_page_header'] = $event instanceof EE_Event
-            ? sprintf(
-                esc_html__('%sViewing Transactions for the Event: %s%s', 'event_espresso'),
-                '<h3>',
-                '<a href="'
-                . EE_Admin_Page::add_query_args_and_nonce(
-                    ['action' => 'edit', 'post' => $event->ID()],
-                    EVENTS_ADMIN_URL
-                )
-                . '" title="'
-                . esc_attr__('Click to Edit event', 'event_espresso')
-                . '">' . $event->name() . '</a>',
-                '</h3>'
-            )
-            : '';
-        $this->_template_args['after_list_table']  = $this->_display_legend($this->_transaction_legend_items());
-        $this->display_admin_list_table_page_with_no_sidebar();
-    }
-
-
-    /**
-     *    _transaction_details
-     * generates HTML for the View Transaction Details Admin page
-     *
-     * @access protected
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws RuntimeException
-     * @throws ReflectionException
-     */
-    protected function _transaction_details()
-    {
-        do_action('AHEE__Transactions_Admin_Page__transaction_details__start', $this->_transaction);
-
-        $this->_set_transaction_status_array();
-
-        $this->_template_args                      = [];
-        $this->_template_args['transactions_page'] = $this->_wp_page_slug;
-
-        $this->_set_transaction_object();
-
-        if (! $this->_transaction instanceof EE_Transaction) {
-            return;
-        }
-
-        $this->_template_args['txn_nmbr']['value'] = $this->_transaction->ID();
-        $this->_template_args['txn_nmbr']['label'] = esc_html__('Transaction Number', 'event_espresso');
-
-        $this->_template_args['txn_datetime']['value'] = $this->_transaction->get_i18n_datetime('TXN_timestamp');
-        $this->_template_args['txn_datetime']['label'] = esc_html__('Date', 'event_espresso');
-
-        $this->_template_args['txn_status']['value'] = self::$_txn_status[ $this->_transaction->status_ID() ];
-        $this->_template_args['txn_status']['label'] = esc_html__('Transaction Status', 'event_espresso');
-        $this->_template_args['txn_status']['class'] = 'status-' . $this->_transaction->status_ID();
-
-        $this->_template_args['grand_total'] = $this->_transaction->total();
-        $this->_template_args['total_paid']  = $this->_transaction->paid();
-
-        $amount_due                         = $this->_transaction->total() - $this->_transaction->paid();
-        $this->_template_args['amount_due'] = EEH_Template::format_currency(
-            $amount_due,
-            true
-        );
-        if (EE_Registry::instance()->CFG->currency->sign_b4) {
-            $this->_template_args['amount_due'] = EE_Registry::instance()->CFG->currency->sign
-                                                  . $this->_template_args['amount_due'];
-        } else {
-            $this->_template_args['amount_due'] .= EE_Registry::instance()->CFG->currency->sign;
-        }
-        $this->_template_args['amount_due_class'] = '';
-
-        if ($this->_transaction->paid() === $this->_transaction->total()) {
-            // paid in full
-            $this->_template_args['amount_due'] = false;
-        } elseif ($this->_transaction->paid() > $this->_transaction->total()) {
-            // overpaid
-            $this->_template_args['amount_due_class'] = 'txn-overview-no-payment-spn';
-        } elseif ($this->_transaction->total() > (float) 0) {
-            if ($this->_transaction->paid() > (float) 0) {
-                // monies owing
-                $this->_template_args['amount_due_class'] = 'txn-overview-part-payment-spn';
-            } elseif ($this->_transaction->paid() === (float) 0) {
-                // no payments made yet
-                $this->_template_args['amount_due_class'] = 'txn-overview-no-payment-spn';
-            }
-        } elseif ($this->_transaction->total() === (float) 0) {
-            // free event
-            $this->_template_args['amount_due'] = false;
-        }
-
-        $payment_method = $this->_transaction->payment_method();
-
-        $this->_template_args['method_of_payment_name'] = $payment_method instanceof EE_Payment_Method
-            ? $payment_method->admin_name()
-            : esc_html__('Unknown', 'event_espresso');
-
-        $this->_template_args['currency_sign'] = EE_Registry::instance()->CFG->currency->sign;
-        // link back to overview
-        $this->_template_args['txn_overview_url'] = $this->request->getServerParam(
-            'HTTP_REFERER',
-            TXN_ADMIN_URL
-        );
-
-
-        // next link
-        $next_txn                                 = $this->_transaction->next(
-            null,
-            [['STS_ID' => ['!=', EEM_Transaction::failed_status_code]]],
-            'TXN_ID'
-        );
-        $this->_template_args['next_transaction'] = $next_txn
-            ? $this->_next_link(
-                EE_Admin_Page::add_query_args_and_nonce(
-                    ['action' => 'view_transaction', 'TXN_ID' => $next_txn['TXN_ID']],
-                    TXN_ADMIN_URL
-                ),
-                'dashicons dashicons-arrow-right ee-icon-size-22'
-            )
-            : '';
-        // previous link
-        $previous_txn                                 = $this->_transaction->previous(
-            null,
-            [['STS_ID' => ['!=', EEM_Transaction::failed_status_code]]],
-            'TXN_ID'
-        );
-        $this->_template_args['previous_transaction'] = $previous_txn
-            ? $this->_previous_link(
-                EE_Admin_Page::add_query_args_and_nonce(
-                    ['action' => 'view_transaction', 'TXN_ID' => $previous_txn['TXN_ID']],
-                    TXN_ADMIN_URL
-                ),
-                'dashicons dashicons-arrow-left ee-icon-size-22'
-            )
-            : '';
-
-        $EVT_ID        = $this->request->getRequestParam('EVT_ID', 0, 'int');
-        $event_name    = $this->request->getRequestParam('event_name');
-        $redirect_from = $this->request->getRequestParam('redirect_from', '', 'url');
-
-        // were we just redirected here after adding a new registration ???
-        if ($EVT_ID && $event_name && $redirect_from) {
-            if (
-                EE_Registry::instance()->CAP->current_user_can(
-                    'ee_edit_registrations',
-                    'espresso_registrations_new_registration',
-                    $EVT_ID
-                )
-            ) {
-                $this->_admin_page_title .= '<a id="add-new-registration" class="add-new-h2 button-primary" href="';
-                $this->_admin_page_title .= EE_Admin_Page::add_query_args_and_nonce(
-                    [
-                        'page'     => 'espresso_registrations',
-                        'action'   => 'new_registration',
-                        'return'   => 'default',
-                        'TXN_ID'   => $this->_transaction->ID(),
-                        'event_id' => $EVT_ID,
-                    ],
-                    REG_ADMIN_URL
-                );
-                $this->_admin_page_title .= '">';
-
-                $this->_admin_page_title .= sprintf(
-                    esc_html__('Add Another New Registration to Event: "%1$s" ?', 'event_espresso'),
-                    htmlentities(urldecode($event_name), ENT_QUOTES, 'UTF-8')
-                );
-                $this->_admin_page_title .= '</a>';
-            }
-            EE_Registry::instance()->SSN->clear_session(__CLASS__, __FUNCTION__);
-        }
-        // grab messages at the last second
-        $this->_template_args['notices'] = EE_Error::get_notices();
-        // path to template
-        $template_path                             = TXN_TEMPLATE_PATH . 'txn_admin_details_header.template.php';
-        $this->_template_args['admin_page_header'] = EEH_Template::display_template(
-            $template_path,
-            $this->_template_args,
-            true
-        );
-
-        // the details template wrapper
-        $this->display_admin_page_with_sidebar();
-    }
-
-
-    /**
-     *        _transaction_details_metaboxes
-     *
-     * @access protected
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws RuntimeException
-     * @throws ReflectionException
-     */
-    protected function _transaction_details_metaboxes()
-    {
-
-        $this->_set_transaction_object();
-
-        if (! $this->_transaction instanceof EE_Transaction) {
-            return;
-        }
-        add_meta_box(
-            'edit-txn-details-mbox',
-            esc_html__('Transaction Details', 'event_espresso'),
-            [$this, 'txn_details_meta_box'],
-            $this->_wp_page_slug,
-            'normal',
-            'high'
-        );
-        add_meta_box(
-            'edit-txn-attendees-mbox',
-            esc_html__('Attendees Registered in this Transaction', 'event_espresso'),
-            [$this, 'txn_attendees_meta_box'],
-            $this->_wp_page_slug,
-            'normal',
-            'high',
-            ['TXN_ID' => $this->_transaction->ID()]
-        );
-        add_meta_box(
-            'edit-txn-registrant-mbox',
-            esc_html__('Primary Contact', 'event_espresso'),
-            [$this, 'txn_registrant_side_meta_box'],
-            $this->_wp_page_slug,
-            'side',
-            'high'
-        );
-        add_meta_box(
-            'edit-txn-billing-info-mbox',
-            esc_html__('Billing Information', 'event_espresso'),
-            [$this, 'txn_billing_info_side_meta_box'],
-            $this->_wp_page_slug,
-            'side',
-            'high'
-        );
-    }
-
-
-    /**
-     * Callback for transaction actions metabox.
-     *
-     * @param EE_Transaction|null $transaction
-     * @return string
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     */
-    public function getActionButtons(EE_Transaction $transaction = null)
-    {
-        $content = '';
-        $actions = [];
-        if (! $transaction instanceof EE_Transaction) {
-            return $content;
-        }
-        /** @var EE_Registration $primary_registration */
-        $primary_registration = $transaction->primary_registration();
-        $attendee             = $primary_registration instanceof EE_Registration
-            ? $primary_registration->attendee()
-            : null;
-
-        if (
-            $attendee instanceof EE_Attendee
-            && EE_Registry::instance()->CAP->current_user_can(
-                'ee_send_message',
-                'espresso_transactions_send_payment_reminder'
-            )
-        ) {
-            $actions['payment_reminder'] =
-                EEH_MSG_Template::is_mt_active('payment_reminder')
-                && $this->_transaction->status_ID() !== EEM_Transaction::complete_status_code
-                && $this->_transaction->status_ID() !== EEM_Transaction::overpaid_status_code
-                    ? EEH_Template::get_button_or_link(
-                        EE_Admin_Page::add_query_args_and_nonce(
-                            [
-                            'action'      => 'send_payment_reminder',
-                            'TXN_ID'      => $this->_transaction->ID(),
-                            'redirect_to' => 'view_transaction',
-                            ],
-                            TXN_ADMIN_URL
-                        ),
-                        esc_html__(' Send Payment Reminder', 'event_espresso'),
-                        'button secondary-button',
-                        'dashicons dashicons-email-alt'
-                    )
-                    : '';
-        }
-
-        if (
-            EE_Registry::instance()->CAP->current_user_can(
-                'ee_edit_payments',
-                'espresso_transactions_recalculate_line_items'
-            )
-        ) {
-            $actions['recalculate_line_items'] = EEH_Template::get_button_or_link(
-                EE_Admin_Page::add_query_args_and_nonce(
-                    [
-                        'action'      => 'espresso_recalculate_line_items',
-                        'TXN_ID'      => $this->_transaction->ID(),
-                        'redirect_to' => 'view_transaction',
-                    ],
-                    TXN_ADMIN_URL
-                ),
-                esc_html__(' Recalculate Taxes and Total', 'event_espresso'),
-                'button secondary-button',
-                'dashicons dashicons-update'
-            );
-        }
-
-        if (
-            $primary_registration instanceof EE_Registration
-            && EEH_MSG_Template::is_mt_active('receipt')
-        ) {
-            $actions['receipt'] = EEH_Template::get_button_or_link(
-                $primary_registration->receipt_url(),
-                esc_html__('View Receipt', 'event_espresso'),
-                'button secondary-button',
-                'dashicons dashicons-media-default'
-            );
-        }
-
-        if (
-            $primary_registration instanceof EE_Registration
-            && EEH_MSG_Template::is_mt_active('invoice')
-        ) {
-            $actions['invoice'] = EEH_Template::get_button_or_link(
-                $primary_registration->invoice_url(),
-                esc_html__('View Invoice', 'event_espresso'),
-                'button secondary-button',
-                'dashicons dashicons-media-spreadsheet'
-            );
-        }
-        $actions = array_filter(
-            apply_filters('FHEE__Transactions_Admin_Page__getActionButtons__actions', $actions, $transaction)
-        );
-        if ($actions) {
-            $content = '<ul>';
-            $content .= '<li>' . implode('</li><li>', $actions) . '</li>';
-            $content .= '</uL>';
-        }
-        return $content;
-    }
-
-
-    /**
-     * txn_details_meta_box
-     * generates HTML for the Transaction main meta box
-     *
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws RuntimeException
-     * @throws ReflectionException
-     */
-    public function txn_details_meta_box()
-    {
-        $this->_set_transaction_object();
-        $this->_template_args['TXN_ID']              = $this->_transaction->ID();
-        $this->_template_args['attendee']            =
-            $this->_transaction->primary_registration() instanceof EE_Registration
-                ? $this->_transaction->primary_registration()->attendee()
-                : null;
-        $this->_template_args['can_edit_payments']   = EE_Registry::instance()->CAP->current_user_can(
-            'ee_edit_payments',
-            'apply_payment_or_refund_from_registration_details'
-        );
-        $this->_template_args['can_delete_payments'] = EE_Registry::instance()->CAP->current_user_can(
-            'ee_delete_payments',
-            'delete_payment_from_registration_details'
-        );
-
-        // get line table
-        EEH_Autoloader::register_line_item_display_autoloaders();
-        $Line_Item_Display                       = new EE_Line_Item_Display(
-            'admin_table',
-            'EE_Admin_Table_Line_Item_Display_Strategy'
-        );
-        $this->_template_args['line_item_table'] = $Line_Item_Display->display_line_item(
-            $this->_transaction->total_line_item()
-        );
-        $this->_template_args['REG_code']        =
-            $this->_transaction->primary_registration() instanceof EE_Registration
-                ? $this->_transaction->primary_registration()->reg_code()
-                : null;
-        // process taxes
-        $taxes                         = $this->_transaction->line_items([['LIN_type' => EEM_Line_Item::type_tax]]);
-        $this->_template_args['taxes'] = ! empty($taxes) ? $taxes : false;
-
-        $this->_template_args['grand_total']     = EEH_Template::format_currency(
-            $this->_transaction->total(),
-            false,
-            false
-        );
-        $this->_template_args['grand_raw_total'] = $this->_transaction->total();
-        $this->_template_args['TXN_status']      = $this->_transaction->status_ID();
-
-        // process payment details
-        $payments = $this->_transaction->payments();
-        if (! empty($payments)) {
-            $this->_template_args['payments']              = $payments;
-            $this->_template_args['existing_reg_payments'] = $this->_get_registration_payment_IDs($payments);
-        } else {
-            $this->_template_args['payments']              = false;
-            $this->_template_args['existing_reg_payments'] = [];
-        }
-
-        $this->_template_args['edit_payment_url']   = add_query_arg(['action' => 'edit_payment'], TXN_ADMIN_URL);
-        $this->_template_args['delete_payment_url'] = add_query_arg(
-            ['action' => 'espresso_delete_payment'],
-            TXN_ADMIN_URL
-        );
-
-        if (isset($txn_details['invoice_number'])) {
-            $this->_template_args['txn_details']['invoice_number']['value'] = $this->_template_args['REG_code'];
-            $this->_template_args['txn_details']['invoice_number']['label'] = esc_html__(
-                'Invoice Number',
-                'event_espresso'
-            );
-        }
-
-        $this->_template_args['txn_details']['registration_session']['value'] =
-            $this->_transaction->primary_registration() instanceof EE_Registration
-                ? $this->_transaction->primary_registration()->session_ID()
-                : null;
-        $this->_template_args['txn_details']['registration_session']['label'] = esc_html__(
-            'Registration Session',
-            'event_espresso'
-        );
-
-        $this->_template_args['txn_details']['ip_address']['value'] = isset($this->_session['ip_address'])
-            ? $this->_session['ip_address']
-            : '';
-        $this->_template_args['txn_details']['ip_address']['label'] = esc_html__(
-            'Transaction placed from IP',
-            'event_espresso'
-        );
-
-        $this->_template_args['txn_details']['user_agent']['value'] = isset($this->_session['user_agent'])
-            ? $this->_session['user_agent']
-            : '';
-        $this->_template_args['txn_details']['user_agent']['label'] = esc_html__(
-            'Registrant User Agent',
-            'event_espresso'
-        );
-
-        $reg_steps = '<ul>';
-        foreach ($this->_transaction->reg_steps() as $reg_step => $reg_step_status) {
-            if ($reg_step_status === true) {
-                $reg_steps .= '<li style="color:#70cc50">'
-                              . sprintf(
-                                  esc_html__('%1$s : Completed', 'event_espresso'),
-                                  ucwords(str_replace('_', ' ', $reg_step))
-                              )
-                              . '</li>';
-            } elseif ($reg_step_status !== false && is_numeric($reg_step_status)) {
-                $reg_steps .= '<li style="color:#2EA2CC">'
-                              . sprintf(
-                                  esc_html__('%1$s : Initiated %2$s', 'event_espresso'),
-                                  ucwords(str_replace('_', ' ', $reg_step)),
-                                  date(
-                                      get_option('date_format') . ' ' . get_option('time_format'),
-                                      $reg_step_status + (get_option('gmt_offset') * HOUR_IN_SECONDS)
-                                  )
-                              )
-                              . '</li>';
-            } else {
-                $reg_steps .= '<li style="color:#E76700">'
-                              . sprintf(
-                                  esc_html__('%1$s : Never Initiated', 'event_espresso'),
-                                  ucwords(str_replace('_', ' ', $reg_step))
-                              )
-                              . '</li>';
-            }
-        }
-        $reg_steps                                                 .= '</ul>';
-        $this->_template_args['txn_details']['reg_steps']['value'] = $reg_steps;
-        $this->_template_args['txn_details']['reg_steps']['label'] = esc_html__(
-            'Registration Step Progress',
-            'event_espresso'
-        );
-
-
-        $this->_get_registrations_to_apply_payment_to();
-        $this->_get_payment_methods($payments);
-        $this->_get_payment_status_array();
-        $this->_get_reg_status_selection(); // sets up the template args for the reg status array for the transaction.
-
-        $this->_template_args['transaction_form_url']    = add_query_arg(
-            [
-                'action'  => 'edit_transaction',
-                'process' => 'transaction',
-            ],
-            TXN_ADMIN_URL
-        );
-        $this->_template_args['apply_payment_form_url']  = add_query_arg(
-            [
-                'page'   => 'espresso_transactions',
-                'action' => 'espresso_apply_payment',
-            ],
-            WP_AJAX_URL
-        );
-        $this->_template_args['delete_payment_form_url'] = add_query_arg(
-            [
-                'page'   => 'espresso_transactions',
-                'action' => 'espresso_delete_payment',
-            ],
-            WP_AJAX_URL
-        );
-
-        $this->_template_args['action_buttons'] = $this->getActionButtons($this->_transaction);
-
-        // 'espresso_delete_payment_nonce'
-
-        $template_path = TXN_TEMPLATE_PATH . 'txn_admin_details_main_meta_box_txn_details.template.php';
-        echo EEH_Template::display_template($template_path, $this->_template_args, true);
-    }
-
-
-    /**
-     * _get_registration_payment_IDs
-     *    generates an array of Payment IDs and their corresponding Registration IDs
-     *
-     * @access protected
-     * @param EE_Payment[] $payments
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _get_registration_payment_IDs($payments = [])
-    {
-        $existing_reg_payments = [];
-        // get all reg payments for these payments
-        $reg_payments = EEM_Registration_Payment::instance()->get_all(
-            [
-                [
-                    'PAY_ID' => [
-                        'IN',
-                        array_keys($payments),
-                    ],
-                ],
-            ]
-        );
-        if (! empty($reg_payments)) {
-            foreach ($payments as $payment) {
-                if (! $payment instanceof EE_Payment) {
-                    continue;
-                } elseif (! isset($existing_reg_payments[ $payment->ID() ])) {
-                    $existing_reg_payments[ $payment->ID() ] = [];
-                }
-                foreach ($reg_payments as $reg_payment) {
-                    if (
-                        $reg_payment instanceof EE_Registration_Payment
-                        && $reg_payment->payment_ID() === $payment->ID()
-                    ) {
-                        $existing_reg_payments[ $payment->ID() ][] = $reg_payment->registration_ID();
-                    }
-                }
-            }
-        }
-
-        return $existing_reg_payments;
-    }
-
-
-    /**
-     * _get_registrations_to_apply_payment_to
-     *    generates HTML for displaying a series of checkboxes in the admin payment modal window
-     * which allows the admin to only apply the payment to the specific registrations
-     *
-     * @access protected
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _get_registrations_to_apply_payment_to()
-    {
-        // we want any registration with an active status (ie: not deleted or cancelled)
-        $query_params                      = [
-            [
-                'STS_ID' => [
-                    'IN',
-                    [
-                        EEM_Registration::status_id_approved,
-                        EEM_Registration::status_id_pending_payment,
-                        EEM_Registration::status_id_not_approved,
-                    ],
-                ],
-            ],
-        ];
-        $registrations_to_apply_payment_to = EEH_HTML::br() . EEH_HTML::div(
-            '',
-            'txn-admin-apply-payment-to-registrations-dv',
-            '',
-            'clear: both; margin: 1.5em 0 0; display: none;'
-        );
-        $registrations_to_apply_payment_to .= EEH_HTML::br() . EEH_HTML::div('', '', 'admin-primary-mbox-tbl-wrap');
-        $registrations_to_apply_payment_to .= EEH_HTML::table('', '', 'admin-primary-mbox-tbl');
-        $registrations_to_apply_payment_to .= EEH_HTML::thead(
-            EEH_HTML::tr(
-                EEH_HTML::th(esc_html__('ID', 'event_espresso')) .
-                EEH_HTML::th(esc_html__('Registrant', 'event_espresso')) .
-                EEH_HTML::th(esc_html__('Ticket', 'event_espresso')) .
-                EEH_HTML::th(esc_html__('Event', 'event_espresso')) .
-                EEH_HTML::th(esc_html__('Paid', 'event_espresso'), '', 'txn-admin-payment-paid-td jst-cntr') .
-                EEH_HTML::th(esc_html__('Owing', 'event_espresso'), '', 'txn-admin-payment-owing-td jst-cntr') .
-                EEH_HTML::th(esc_html__('Apply', 'event_espresso'), '', 'jst-cntr')
-            )
-        );
-        $registrations_to_apply_payment_to .= EEH_HTML::tbody();
-        // get registrations for TXN
-        $registrations         = $this->_transaction->registrations($query_params);
-        $existing_reg_payments = $this->_template_args['existing_reg_payments'];
-        foreach ($registrations as $registration) {
-            if ($registration instanceof EE_Registration) {
-                $attendee_name                     = $registration->attendee() instanceof EE_Attendee
-                    ? $registration->attendee()->full_name()
-                    : esc_html__('Unknown Attendee', 'event_espresso');
-                $owing                             = $registration->final_price() - $registration->paid();
-                $taxable                           = $registration->ticket()->taxable()
-                    ? ' <span class="smaller-text lt-grey-text"> ' . esc_html__('+ tax', 'event_espresso') . '</span>'
-                    : '';
-                $checked                           = empty($existing_reg_payments)
-                                                     || in_array($registration->ID(), $existing_reg_payments, true)
-                    ? ' checked="checked"'
-                    : '';
-                $disabled                          = $registration->final_price() > 0 ? '' : ' disabled';
-                $registrations_to_apply_payment_to .= EEH_HTML::tr(
-                    EEH_HTML::td($registration->ID()) .
-                    EEH_HTML::td($attendee_name) .
-                    EEH_HTML::td(
-                        $registration->ticket()->name() . ' : ' . $registration->ticket()->pretty_price() . $taxable
-                    ) .
-                    EEH_HTML::td($registration->event_name()) .
-                    EEH_HTML::td($registration->pretty_paid(), '', 'txn-admin-payment-paid-td jst-cntr') .
-                    EEH_HTML::td(
-                        EEH_Template::format_currency($owing),
-                        '',
-                        'txn-admin-payment-owing-td jst-cntr'
-                    ) .
-                    EEH_HTML::td(
-                        '<input type="checkbox" value="' . $registration->ID()
-                        . '" name="txn_admin_payment[registrations]"'
-                        . $checked . $disabled . '>',
-                        '',
-                        'jst-cntr'
-                    ),
-                    'apply-payment-registration-row-' . $registration->ID()
-                );
-            }
-        }
-        $registrations_to_apply_payment_to                         .= EEH_HTML::tbodyx();
-        $registrations_to_apply_payment_to                         .= EEH_HTML::tablex();
-        $registrations_to_apply_payment_to                         .= EEH_HTML::divx();
-        $registrations_to_apply_payment_to                         .= EEH_HTML::p(
-            esc_html__(
-                'The payment will only be applied to the registrations that have a check mark in their corresponding check box. Checkboxes for free registrations have been disabled.',
-                'event_espresso'
-            ),
-            '',
-            'clear description'
-        );
-        $registrations_to_apply_payment_to                         .= EEH_HTML::divx();
-        $this->_template_args['registrations_to_apply_payment_to'] = $registrations_to_apply_payment_to;
-    }
-
-
-    /**
-     * _get_reg_status_selection
-     *
-     * @return void
-     * @throws EE_Error
-     * @todo   this will need to be adjusted either once MER comes along OR we move default reg status to tickets
-     *         instead of events.
-     * @access protected
-     */
-    protected function _get_reg_status_selection()
-    {
-        // first get all possible statuses
-        $statuses = EEM_Registration::reg_status_array([], true);
-        // let's add a "don't change" option.
-        $status_array['NAN']                                 = esc_html__('Leave the Same', 'event_espresso');
-        $status_array                                        = array_merge($status_array, $statuses);
-        $this->_template_args['status_change_select']        = EEH_Form_Fields::select_input(
-            'txn_reg_status_change[reg_status]',
-            $status_array,
-            'NAN',
-            'id="txn-admin-payment-reg-status-inp"',
-            'txn-reg-status-change-reg-status'
-        );
-        $this->_template_args['delete_status_change_select'] = EEH_Form_Fields::select_input(
-            'delete_txn_reg_status_change[reg_status]',
-            $status_array,
-            'NAN',
-            'delete-txn-admin-payment-reg-status-inp',
-            'delete-txn-reg-status-change-reg-status'
-        );
-    }
-
-
-    /**
-     *    _get_payment_methods
-     * Gets all the payment methods available generally, or the ones that are already
-     * selected on these payments (in case their payment methods are no longer active).
-     * Has the side-effect of updating the template args' payment_methods item
-     *
-     * @access private
-     * @param EE_Payment[] to show on this page
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    private function _get_payment_methods($payments = [])
-    {
-        $payment_methods_of_payments = [];
-        foreach ($payments as $payment) {
-            if ($payment instanceof EE_Payment) {
-                $payment_methods_of_payments[] = $payment->ID();
-            }
-        }
-        if ($payment_methods_of_payments) {
-            $query_args = [
-                [
-                    'OR*payment_method_for_payment' => [
-                        'PMD_ID'    => ['IN', $payment_methods_of_payments],
-                        'PMD_scope' => ['LIKE', '%' . EEM_Payment_Method::scope_admin . '%'],
-                    ],
-                ],
-            ];
-        } else {
-            $query_args = [['PMD_scope' => ['LIKE', '%' . EEM_Payment_Method::scope_admin . '%']]];
-        }
-        $this->_template_args['payment_methods'] = EEM_Payment_Method::instance()->get_all($query_args);
-    }
-
-
-    /**
-     * txn_attendees_meta_box
-     *    generates HTML for the Attendees Transaction main meta box
-     *
-     * @access public
-     * @param WP_Post $post
-     * @param array   $metabox
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function txn_attendees_meta_box($post, $metabox = ['args' => []])
-    {
-
-        /** @noinspection NonSecureExtractUsageInspection */
-        extract($metabox['args']);
-        $this->_template_args['post']            = $post;
-        $this->_template_args['event_attendees'] = [];
-        // process items in cart
-        $line_items = $this->_transaction->get_many_related(
-            'Line_Item',
-            [['LIN_type' => 'line-item']]
-        );
-        if (! empty($line_items)) {
-            foreach ($line_items as $item) {
-                if ($item instanceof EE_Line_Item) {
-                    switch ($item->OBJ_type()) {
-                        case 'Event':
-                            break;
-                        case 'Ticket':
-                            $ticket = $item->ticket();
-                            // right now we're only handling tickets here.
-                            // Cause its expected that only tickets will have attendees right?
-                            if (! $ticket instanceof EE_Ticket) {
-                                break;
-                            }
-                            try {
-                                $event_name = $ticket->get_event_name();
-                            } catch (Exception $e) {
-                                EE_Error::add_error($e->getMessage(), __FILE__, __FUNCTION__, __LINE__);
-                                $event_name = esc_html__('Unknown Event', 'event_espresso');
-                            }
-                            $event_name   .= ' - ' . $item->name();
-                            $ticket_price = EEH_Template::format_currency($item->unit_price());
-                            // now get all of the registrations for this transaction that use this ticket
-                            $registrations = $ticket->registrations(
-                                [['TXN_ID' => $this->_transaction->ID()]]
-                            );
-                            foreach ($registrations as $registration) {
-                                if (! $registration instanceof EE_Registration) {
-                                    break;
-                                }
-                                $this->_template_args['event_attendees'][ $registration->ID() ]['STS_ID']
-                                    = $registration->status_ID();
-                                $this->_template_args['event_attendees'][ $registration->ID() ]['att_num']
-                                    = $registration->count();
-                                $this->_template_args['event_attendees'][ $registration->ID() ]['event_ticket_name']
-                                    = $event_name;
-                                $this->_template_args['event_attendees'][ $registration->ID() ]['ticket_price']
-                                    = $ticket_price;
-                                // attendee info
-                                $attendee = $registration->get_first_related('Attendee');
-                                if ($attendee instanceof EE_Attendee) {
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['att_id']
-                                        = $attendee->ID();
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['attendee']
-                                        = $attendee->full_name();
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['email']
-                                        = '<a href="mailto:' . $attendee->email() . '?subject=' . $event_name
-                                          . esc_html__(
-                                              ' Event',
-                                              'event_espresso'
-                                          )
-                                          . '">' . $attendee->email() . '</a>';
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['address']
-                                        = EEH_Address::format($attendee, 'inline', false, false);
-                                } else {
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['att_id']   = '';
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['attendee'] = '';
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['email']    = '';
-                                    $this->_template_args['event_attendees'][ $registration->ID() ]['address']  = '';
-                                }
-                            }
-                            break;
-                    }
-                }
-            }
-
-            $this->_template_args['transaction_form_url'] = add_query_arg(
-                [
-                    'action'  => 'edit_transaction',
-                    'process' => 'attendees',
-                ],
-                TXN_ADMIN_URL
-            );
-            echo EEH_Template::display_template(
-                TXN_TEMPLATE_PATH . 'txn_admin_details_main_meta_box_attendees.template.php',
-                $this->_template_args,
-                true
-            );
-        } else {
-            printf(
-                esc_html__(
-                    '%1$sFor some reason, there are no attendees registered for this transaction. Likely the registration was abandoned in process.%2$s',
-                    'event_espresso'
-                ),
-                '<p class="important-notice">',
-                '</p>'
-            );
-        }
-    }
-
-
-    /**
-     * txn_registrant_side_meta_box
-     * generates HTML for the Edit Transaction side meta box
-     *
-     * @access public
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    public function txn_registrant_side_meta_box()
-    {
-        $primary_att = $this->_transaction->primary_registration() instanceof EE_Registration
-            ? $this->_transaction->primary_registration()->get_first_related('Attendee')
-            : null;
-        if (! $primary_att instanceof EE_Attendee) {
-            $this->_template_args['no_attendee_message'] = esc_html__(
-                'There is no attached contact for this transaction.  The transaction either failed due to an error or was abandoned.',
-                'event_espresso'
-            );
-            $primary_att                           = EEM_Attendee::instance()->create_default_object();
-        }
-        $this->_template_args['ATT_ID']            = $primary_att->ID();
-        $this->_template_args['prime_reg_fname']   = $primary_att->fname();
-        $this->_template_args['prime_reg_lname']   = $primary_att->lname();
-        $this->_template_args['prime_reg_email']   = $primary_att->email();
-        $this->_template_args['prime_reg_phone']   = $primary_att->phone();
-        $this->_template_args['edit_attendee_url'] = EE_Admin_Page::add_query_args_and_nonce(
-            [
-                'action' => 'edit_attendee',
-                'post'   => $primary_att->ID(),
-            ],
-            REG_ADMIN_URL
-        );
-        // get formatted address for registrant
-        $this->_template_args['formatted_address'] = EEH_Address::format($primary_att);
-        echo EEH_Template::display_template(
-            TXN_TEMPLATE_PATH . 'txn_admin_details_side_meta_box_registrant.template.php',
-            $this->_template_args,
-            true
-        );
-    }
-
-
-    /**
-     * txn_billing_info_side_meta_box
-     *    generates HTML for the Edit Transaction side meta box
-     *
-     * @access public
-     * @return void
-     * @throws DomainException
-     * @throws EE_Error
-     * @throws ReflectionException
-     */
-    public function txn_billing_info_side_meta_box()
-    {
-
-        $this->_template_args['billing_form']     = $this->_transaction->billing_info();
-        $this->_template_args['billing_form_url'] = add_query_arg(
-            ['action' => 'edit_transaction', 'process' => 'billing'],
-            TXN_ADMIN_URL
-        );
-
-        $template_path = TXN_TEMPLATE_PATH . 'txn_admin_details_side_meta_box_billing_info.template.php';
-        echo EEH_Template::display_template($template_path, $this->_template_args, true);
-    }
-
-
-    /**
-     * apply_payments_or_refunds
-     *    registers a payment or refund made towards a transaction
-     *
-     * @access public
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function apply_payments_or_refunds()
-    {
-        $json_response_data = ['return_data' => false];
-        $valid_data         = $this->_validate_payment_request_data();
-        $has_access         = EE_Registry::instance()->CAP->current_user_can(
-            'ee_edit_payments',
-            'apply_payment_or_refund_from_registration_details'
-        );
-        if (! empty($valid_data) && $has_access) {
-            $PAY_ID = $valid_data['PAY_ID'];
-            // save  the new payment
-            $payment = $this->_create_payment_from_request_data($valid_data);
-            // get the TXN for this payment
-            $transaction = $payment->transaction();
-            // verify transaction
-            if ($transaction instanceof EE_Transaction) {
-                // calculate_total_payments_and_update_status
-                $this->_process_transaction_payments($transaction);
-                $REG_IDs = $this->_get_REG_IDs_to_apply_payment_to($payment);
-                $this->_remove_existing_registration_payments($payment, $PAY_ID);
-                // apply payment to registrations (if applicable)
-                if (! empty($REG_IDs)) {
-                    $this->_update_registration_payments($transaction, $payment, $REG_IDs);
-                    $this->_maybe_send_notifications();
-                    // now process status changes for the same registrations
-                    $this->_process_registration_status_change($transaction, $REG_IDs);
-                }
-                $this->_maybe_send_notifications($payment);
-                // prepare to render page
-                $json_response_data['return_data'] = $this->_build_payment_json_response($payment, $REG_IDs);
-                do_action(
-                    'AHEE__Transactions_Admin_Page__apply_payments_or_refund__after_recording',
-                    $transaction,
-                    $payment
-                );
-            } else {
-                EE_Error::add_error(
-                    esc_html__(
-                        'A valid Transaction for this payment could not be retrieved.',
-                        'event_espresso'
-                    ),
-                    __FILE__,
-                    __FUNCTION__,
-                    __LINE__
-                );
-            }
-        } elseif ($has_access) {
-            EE_Error::add_error(
-                esc_html__(
-                    'The payment form data could not be processed. Please try again.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        } else {
-            EE_Error::add_error(
-                esc_html__(
-                    'You do not have access to apply payments or refunds to a registration.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-        $notices              = EE_Error::get_notices(
-            false,
-            false,
-            false
-        );
-        $this->_template_args = [
-            'data'    => $json_response_data,
-            'error'   => $notices['errors'],
-            'success' => $notices['success'],
-        ];
-        $this->_return_json();
-    }
-
-
-    /**
-     * _validate_payment_request_data
-     *
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _validate_payment_request_data()
-    {
-        if (! $this->request->requestParamIsSet('txn_admin_payment')) {
-            return [];
-        }
-        $payment_form = $this->_generate_payment_form_section();
-        try {
-            if ($payment_form->was_submitted()) {
-                $payment_form->receive_form_submission();
-                if (! $payment_form->is_valid()) {
-                    $submission_error_messages = [];
-                    foreach ($payment_form->get_validation_errors_accumulated() as $validation_error) {
-                        if ($validation_error instanceof EE_Validation_Error) {
-                            $form_input = $validation_error->get_form_section();
-                            $submission_error_messages[] = sprintf(
-                                _x('%s : %s', 'Form Section Name : Form Validation Error', 'event_espresso'),
-                                $form_input instanceof EE_Form_Input_Base ? $form_input->html_label_text() : '',
-                                $validation_error->getMessage()
-                            );
-                        }
-                    }
-                    EE_Error::add_error(
-                        implode('<br />', $submission_error_messages),
-                        __FILE__,
-                        __FUNCTION__,
-                        __LINE__
-                    );
-                    return [];
-                }
-            }
-        } catch (EE_Error $e) {
-            EE_Error::add_error($e->getMessage(), __FILE__, __FUNCTION__, __LINE__);
-            return [];
-        }
-
-        return $payment_form->valid_data();
-    }
-
-
-    /**
-     * _generate_payment_form_section
-     *
-     * @return EE_Form_Section_Proper
-     * @throws EE_Error
-     */
-    protected function _generate_payment_form_section()
-    {
-        return new EE_Form_Section_Proper(
-            [
-                'name'        => 'txn_admin_payment',
-                'subsections' => [
-                    'PAY_ID'          => new EE_Text_Input(
-                        [
-                            'default'               => 0,
-                            'required'              => false,
-                            'html_label_text'       => esc_html__('Payment ID', 'event_espresso'),
-                            'validation_strategies' => [new EE_Int_Normalization()],
-                        ]
-                    ),
-                    'TXN_ID'          => new EE_Text_Input(
-                        [
-                            'default'               => 0,
-                            'required'              => true,
-                            'html_label_text'       => esc_html__('Transaction ID', 'event_espresso'),
-                            'validation_strategies' => [new EE_Int_Normalization()],
-                        ]
-                    ),
-                    'type'            => new EE_Text_Input(
-                        [
-                            'default'               => 1,
-                            'required'              => true,
-                            'html_label_text'       => esc_html__('Payment or Refund', 'event_espresso'),
-                            'validation_strategies' => [new EE_Int_Normalization()],
-                        ]
-                    ),
-                    'amount'          => new EE_Text_Input(
-                        [
-                            'default'               => 0,
-                            'required'              => true,
-                            'html_label_text'       => esc_html__('Payment amount', 'event_espresso'),
-                            'validation_strategies' => [new EE_Float_Normalization()],
-                        ]
-                    ),
-                    'status'          => new EE_Text_Input(
-                        [
-                            'default'         => EEM_Payment::status_id_approved,
-                            'required'        => true,
-                            'html_label_text' => esc_html__('Payment status', 'event_espresso'),
-                        ]
-                    ),
-                    'PMD_ID'          => new EE_Text_Input(
-                        [
-                            'default'               => 2,
-                            'required'              => true,
-                            'html_label_text'       => esc_html__('Payment Method', 'event_espresso'),
-                            'validation_strategies' => [new EE_Int_Normalization()],
-                        ]
-                    ),
-                    'date'            => new EE_Text_Input(
-                        [
-                            'default'         => time(),
-                            'required'        => true,
-                            'html_label_text' => esc_html__('Payment date', 'event_espresso'),
-                        ]
-                    ),
-                    'txn_id_chq_nmbr' => new EE_Text_Input(
-                        [
-                            'default'               => '',
-                            'required'              => false,
-                            'html_label_text'       => esc_html__('Transaction or Cheque Number', 'event_espresso'),
-                            'validation_strategies' => [
-                                new EE_Max_Length_Validation_Strategy(
-                                    esc_html__('Input too long', 'event_espresso'),
-                                    100
-                                ),
-                            ],
-                        ]
-                    ),
-                    'po_number'       => new EE_Text_Input(
-                        [
-                            'default'               => '',
-                            'required'              => false,
-                            'html_label_text'       => esc_html__('Purchase Order Number', 'event_espresso'),
-                            'validation_strategies' => [
-                                new EE_Max_Length_Validation_Strategy(
-                                    esc_html__('Input too long', 'event_espresso'),
-                                    100
-                                ),
-                            ],
-                        ]
-                    ),
-                    'accounting'      => new EE_Text_Input(
-                        [
-                            'default'               => '',
-                            'required'              => false,
-                            'html_label_text'       => esc_html__('Extra Field for Accounting', 'event_espresso'),
-                            'validation_strategies' => [
-                                new EE_Max_Length_Validation_Strategy(
-                                    esc_html__('Input too long', 'event_espresso'),
-                                    100
-                                ),
-                            ],
-                        ]
-                    ),
-                ],
-            ]
-        );
-    }
-
-
-    /**
-     * _create_payment_from_request_data
-     *
-     * @param array $valid_data
-     * @return EE_Payment
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _create_payment_from_request_data($valid_data)
-    {
-        $PAY_ID = $valid_data['PAY_ID'];
-        // get payment amount
-        $amount = $valid_data['amount'] ? abs($valid_data['amount']) : 0;
-        // payments have a type value of 1 and refunds have a type value of -1
-        // so multiplying amount by type will give a positive value for payments, and negative values for refunds
-        $amount = $valid_data['type'] < 0 ? $amount * -1 : $amount;
-        // for some reason the date string coming in has extra spaces between the date and time.  This fixes that.
-        $date    = $valid_data['date']
-            ? preg_replace('/\s+/', ' ', $valid_data['date'])
-            : date('Y-m-d g:i a', current_time('timestamp'));
-        $payment = EE_Payment::new_instance(
-            [
-                'TXN_ID'              => $valid_data['TXN_ID'],
-                'STS_ID'              => $valid_data['status'],
-                'PAY_timestamp'       => $date,
-                'PAY_source'          => EEM_Payment_Method::scope_admin,
-                'PMD_ID'              => $valid_data['PMD_ID'],
-                'PAY_amount'          => $amount,
-                'PAY_txn_id_chq_nmbr' => $valid_data['txn_id_chq_nmbr'],
-                'PAY_po_number'       => $valid_data['po_number'],
-                'PAY_extra_accntng'   => $valid_data['accounting'],
-                'PAY_details'         => $valid_data,
-                'PAY_ID'              => $PAY_ID,
-            ],
-            '',
-            ['Y-m-d', 'g:i a']
-        );
-
-        if (! $payment->save()) {
-            EE_Error::add_error(
-                sprintf(
-                    esc_html__('Payment %1$d has not been successfully saved to the database.', 'event_espresso'),
-                    $payment->ID()
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-
-        return $payment;
-    }
-
-
-    /**
-     * _process_transaction_payments
-     *
-     * @param EE_Transaction $transaction
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _process_transaction_payments(EE_Transaction $transaction)
-    {
-        /** @type EE_Transaction_Payments $transaction_payments */
-        $transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
-        // update the transaction with this payment
-        if ($transaction_payments->calculate_total_payments_and_update_status($transaction)) {
-            EE_Error::add_success(
-                esc_html__(
-                    'The payment has been processed successfully.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        } else {
-            EE_Error::add_error(
-                esc_html__(
-                    'The payment was processed successfully but the amount paid for the transaction was not updated.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-    }
-
-
-    /**
-     * _get_REG_IDs_to_apply_payment_to
-     * returns a list of registration IDs that the payment will apply to
-     *
-     * @param EE_Payment $payment
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _get_REG_IDs_to_apply_payment_to(EE_Payment $payment)
-    {
-        // grab array of IDs for specific registrations to apply changes to
-        $REG_IDs = $this->request->getRequestParam('txn_admin_payment[registrations]', [], 'int', true);
-        // nothing specified ? then get all reg IDs
-        if (empty($REG_IDs)) {
-            $registrations = $payment->transaction()->registrations();
-            $REG_IDs       = ! empty($registrations)
-                ? array_keys($registrations)
-                : $this->_get_existing_reg_payment_REG_IDs($payment);
-        }
-
-        // ensure that REG_IDs are integers and NOT strings
-        return array_map('intval', $REG_IDs);
-    }
-
-
-    /**
-     * @return array
-     */
-    public function existing_reg_payment_REG_IDs()
-    {
-        return $this->_existing_reg_payment_REG_IDs;
-    }
-
-
-    /**
-     * @param array $existing_reg_payment_REG_IDs
-     */
-    public function set_existing_reg_payment_REG_IDs($existing_reg_payment_REG_IDs = null)
-    {
-        $this->_existing_reg_payment_REG_IDs = $existing_reg_payment_REG_IDs;
-    }
-
-
-    /**
-     * _get_existing_reg_payment_REG_IDs
-     * returns a list of registration IDs that the payment is currently related to
-     * as recorded in the database
-     *
-     * @param EE_Payment $payment
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _get_existing_reg_payment_REG_IDs(EE_Payment $payment)
-    {
-        if ($this->existing_reg_payment_REG_IDs() === null) {
-            // let's get any existing reg payment records for this payment
-            $existing_reg_payment_REG_IDs = $payment->get_many_related('Registration');
-            // but we only want the REG IDs, so grab the array keys
-            $existing_reg_payment_REG_IDs = ! empty($existing_reg_payment_REG_IDs)
-                ? array_keys($existing_reg_payment_REG_IDs)
-                : [];
-            $this->set_existing_reg_payment_REG_IDs($existing_reg_payment_REG_IDs);
-        }
-
-        return $this->existing_reg_payment_REG_IDs();
-    }
-
-
-    /**
-     * _remove_existing_registration_payments
-     * this calculates the difference between existing relations
-     * to the supplied payment and the new list registration IDs,
-     * removes any related registrations that no longer apply,
-     * and then updates the registration paid fields
-     *
-     * @param EE_Payment $payment
-     * @param int        $PAY_ID
-     * @return bool;
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _remove_existing_registration_payments(EE_Payment $payment, $PAY_ID = 0)
-    {
-        // newly created payments will have nothing recorded for $PAY_ID
-        if (absint($PAY_ID) === 0) {
-            return false;
-        }
-        $existing_reg_payment_REG_IDs = $this->_get_existing_reg_payment_REG_IDs($payment);
-        if (empty($existing_reg_payment_REG_IDs)) {
-            return false;
-        }
-        /** @type EE_Transaction_Payments $transaction_payments */
-        $transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
-
-        return $transaction_payments->delete_registration_payments_and_update_registrations(
-            $payment,
-            [
-                [
-                    'PAY_ID' => $payment->ID(),
-                    'REG_ID' => ['IN', $existing_reg_payment_REG_IDs],
-                ],
-            ]
-        );
-    }
-
-
-    /**
-     * _update_registration_payments
-     * this applies the payments to the selected registrations
-     * but only if they have not already been paid for
-     *
-     * @param EE_Transaction $transaction
-     * @param EE_Payment     $payment
-     * @param array          $REG_IDs
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _update_registration_payments(
-        EE_Transaction $transaction,
-        EE_Payment $payment,
-        $REG_IDs = []
-    ) {
-        // we can pass our own custom set of registrations to EE_Payment_Processor::process_registration_payments()
-        // so let's do that using our set of REG_IDs from the form
-        $registration_query_where_params = [
-            'REG_ID' => ['IN', $REG_IDs],
-        ];
-        // but add in some conditions regarding payment,
-        // so that we don't apply payments to registrations that are free or have already been paid for
-        // but ONLY if the payment is NOT a refund ( ie: the payment amount is not negative )
-        if (! $payment->is_a_refund()) {
-            $registration_query_where_params['REG_final_price']  = ['!=', 0];
-            $registration_query_where_params['REG_final_price*'] = ['!=', 'REG_paid', true];
-        }
-        $registrations = $transaction->registrations([$registration_query_where_params]);
-        if (! empty($registrations)) {
-            /** @type EE_Payment_Processor $payment_processor */
-            $payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
-            $payment_processor->process_registration_payments($transaction, $payment, $registrations);
-        }
-    }
-
-
-    /**
-     * _process_registration_status_change
-     * This processes requested registration status changes for all the registrations
-     * on a given transaction and (optionally) sends out notifications for the changes.
-     *
-     * @param EE_Transaction $transaction
-     * @param array          $REG_IDs
-     * @return bool
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _process_registration_status_change(EE_Transaction $transaction, $REG_IDs = [])
-    {
-        // first if there is no change in status then we get out.
-        $reg_status = $this->request->getRequestParam('txn_reg_status_change[reg_status]', 'NAN');
-        if ($reg_status === 'NAN') {
-            // no error message, no change requested, just nothing to do man.
-            return false;
-        }
-        /** @type EE_Transaction_Processor $transaction_processor */
-        $transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
-
-        // made it here dude?  Oh WOW.  K, let's take care of changing the statuses
-        return $transaction_processor->manually_update_registration_statuses(
-            $transaction,
-            $reg_status,
-            [['REG_ID' => ['IN', $REG_IDs]]]
-        );
-    }
-
-
-    /**
-     * _build_payment_json_response
-     *
-     * @access public
-     * @param EE_Payment  $payment
-     * @param array       $REG_IDs
-     * @param bool | null $delete_txn_reg_status_change
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _build_payment_json_response(
-        EE_Payment $payment,
-        $REG_IDs = [],
-        $delete_txn_reg_status_change = null
-    ) {
-        // was the payment deleted ?
-        if (is_bool($delete_txn_reg_status_change)) {
-            return [
-                'PAY_ID'                       => $payment->ID(),
-                'amount'                       => $payment->amount(),
-                'total_paid'                   => $payment->transaction()->paid(),
-                'txn_status'                   => $payment->transaction()->status_ID(),
-                'pay_status'                   => $payment->STS_ID(),
-                'registrations'                => $this->_registration_payment_data_array($REG_IDs),
-                'delete_txn_reg_status_change' => $delete_txn_reg_status_change,
-            ];
-        }
-
-        $this->_get_payment_status_array();
-        return [
-            'amount'           => $payment->amount(),
-            'total_paid'       => $payment->transaction()->paid(),
-            'txn_status'       => $payment->transaction()->status_ID(),
-            'pay_status'       => $payment->STS_ID(),
-            'PAY_ID'           => $payment->ID(),
-            'STS_ID'           => $payment->STS_ID(),
-            'status'           => self::$_pay_status[ $payment->STS_ID() ],
-            'date'             => $payment->timestamp('Y-m-d', 'h:i a'),
-            'method'           => strtoupper($payment->source()),
-            'PM_ID'            => $payment->payment_method() ? $payment->payment_method()->ID() : 1,
-            'gateway'          => $payment->payment_method()
-                ? $payment->payment_method()->admin_name()
-                : esc_html__('Unknown', 'event_espresso'),
-            'gateway_response' => $payment->gateway_response(),
-            'txn_id_chq_nmbr'  => $payment->txn_id_chq_nmbr(),
-            'po_number'        => $payment->po_number(),
-            'extra_accntng'    => $payment->extra_accntng(),
-            'registrations'    => $this->_registration_payment_data_array($REG_IDs),
-        ];
-    }
-
-
-    /**
-     * delete_payment
-     *    delete a payment or refund made towards a transaction
-     *
-     * @access public
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws ReflectionException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function delete_payment()
-    {
-        $json_response_data = ['return_data' => false];
-        $PAY_ID = $this->request->getRequestParam('delete_txn_admin_payment[PAY_ID]', 0, 'int');
-
-        $can_delete         = EE_Registry::instance()->CAP->current_user_can(
-            'ee_delete_payments',
-            'delete_payment_from_registration_details'
-        );
-        if ($PAY_ID && $can_delete) {
-            $delete_txn_reg_status_change = $this->request->getRequestParam(
-                'delete_txn_reg_status_change',
-                false,
-                'bool'
-            );
-            $payment = EEM_Payment::instance()->get_one_by_ID($PAY_ID);
-            if ($payment instanceof EE_Payment) {
-                $REG_IDs = $this->_get_existing_reg_payment_REG_IDs($payment);
-                /** @type EE_Transaction_Payments $transaction_payments */
-                $transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
-                if ($transaction_payments->delete_payment_and_update_transaction($payment)) {
-                    $json_response_data['return_data'] = $this->_build_payment_json_response(
-                        $payment,
-                        $REG_IDs,
-                        $delete_txn_reg_status_change
-                    );
-                    if ($delete_txn_reg_status_change) {
-                        // MAKE sure we also add the delete_txn_req_status_change to the
-                        // request data because that's how messages will be looking for it.
-                        $this->request->setRequestParam('txn_reg_status_change', $delete_txn_reg_status_change);
-                        $this->_maybe_send_notifications();
-                        $this->_process_registration_status_change($payment->transaction(), $REG_IDs);
-                    }
-                }
-            } else {
-                EE_Error::add_error(
-                    esc_html__('Valid Payment data could not be retrieved from the database.', 'event_espresso'),
-                    __FILE__,
-                    __FUNCTION__,
-                    __LINE__
-                );
-            }
-        } elseif ($can_delete) {
-            EE_Error::add_error(
-                esc_html__(
-                    'A valid Payment ID was not received, therefore payment form data could not be loaded.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        } else {
-            EE_Error::add_error(
-                esc_html__(
-                    'You do not have access to delete a payment.',
-                    'event_espresso'
-                ),
-                __FILE__,
-                __FUNCTION__,
-                __LINE__
-            );
-        }
-        $notices              = EE_Error::get_notices(false, false, false);
-        $this->_template_args = [
-            'data'      => $json_response_data,
-            'success'   => $notices['success'],
-            'error'     => $notices['errors'],
-            'attention' => $notices['attention'],
-        ];
-        $this->_return_json();
-    }
-
-
-    /**
-     * _registration_payment_data_array
-     * adds info for 'owing' and 'paid' for each registration to the json response
-     *
-     * @access protected
-     * @param array $REG_IDs
-     * @return array
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     */
-    protected function _registration_payment_data_array($REG_IDs)
-    {
-        $registration_payment_data = [];
-        // if non empty reg_ids lets get an array of registrations and update the values for the apply_payment/refund rows.
-        if (! empty($REG_IDs)) {
-            $registrations = EEM_Registration::instance()->get_all([['REG_ID' => ['IN', $REG_IDs]]]);
-            foreach ($registrations as $registration) {
-                if ($registration instanceof EE_Registration) {
-                    $registration_payment_data[ $registration->ID() ] = [
-                        'paid'  => $registration->pretty_paid(),
-                        'owing' => EEH_Template::format_currency($registration->final_price() - $registration->paid()),
-                    ];
-                }
-            }
-        }
-
-        return $registration_payment_data;
-    }
-
-
-    /**
-     * _maybe_send_notifications
-     * determines whether or not the admin has indicated that notifications should be sent.
-     * If so, will toggle a filter switch for delivering registration notices.
-     * If passed an EE_Payment object, then it will trigger payment notifications instead.
-     *
-     * @access protected
-     * @param EE_Payment | null $payment
-     */
-    protected function _maybe_send_notifications($payment = null)
-    {
-        switch ($payment instanceof EE_Payment) {
-            // payment notifications
-            case true:
-                if ($this->request->getRequestParam('txn_payments[send_notifications]', false, 'bool')) {
-                    $this->_process_payment_notification($payment);
-                }
-                break;
-            // registration notifications
-            case false:
-                if ($this->request->getRequestParam('txn_reg_status_change[send_notifications]', false, 'bool')) {
-                    add_filter('FHEE__EED_Messages___maybe_registration__deliver_notifications', '__return_true');
-                }
-                break;
-        }
-    }
-
-
-    /**
-     * _send_payment_reminder
-     *    generates HTML for the View Transaction Details Admin page
-     *
-     * @access protected
-     * @return void
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    protected function _send_payment_reminder()
-    {
-        $TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
-        $transaction = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
-        $redirect_to = $this->request->getRequestParam('redirect_to');
-        $query_args  = $redirect_to ? ['action' => $redirect_to, 'TXN_ID' => $TXN_ID,] : [];
-        do_action(
-            'AHEE__Transactions_Admin_Page___send_payment_reminder__process_admin_payment_reminder',
-            $transaction
-        );
-        $this->_redirect_after_action(
-            false,
-            esc_html__('payment reminder', 'event_espresso'),
-            esc_html__('sent', 'event_espresso'),
-            $query_args,
-            true
-        );
-    }
-
-
-    /**
-     *  get_transactions
-     *    get transactions for given parameters (used by list table)
-     *
-     * @param int     $per_page how many transactions displayed per page
-     * @param boolean $count   return the count or objects
-     * @param string  $view
-     * @return EE_Transaction[]|int int = count || array of transaction objects
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     */
-    public function get_transactions($per_page, $count = false, $view = '')
-    {
-        $start_date = wp_strip_all_tags(
-            $this->request->getRequestParam('txn-filter-start-date', date('m/d/Y', strtotime('-10 year')))
-        );
-        $end_date = wp_strip_all_tags(
-            $this->request->getRequestParam('txn-filter-end-date', date('m/d/Y'))
-        );
-
-        // make sure our timestamps start and end right at the boundaries for each day
-        $start_date = date('Y-m-d', strtotime($start_date)) . ' 00:00:00';
-        $end_date   = date('Y-m-d', strtotime($end_date)) . ' 23:59:59';
-
-
-        // convert to timestamps
-        $start_date = strtotime($start_date);
-        $end_date   = strtotime($end_date);
-
-        // makes sure start date is the lowest value and vice versa
-        $start_date = min($start_date, $end_date);
-        $end_date   = max($start_date, $end_date);
-
-        // convert to correct format for query
-        $start_date = EEM_Transaction::instance()->convert_datetime_for_query(
-            'TXN_timestamp',
-            date('Y-m-d H:i:s', $start_date),
-            'Y-m-d H:i:s'
-        );
-        $end_date   = EEM_Transaction::instance()->convert_datetime_for_query(
-            'TXN_timestamp',
-            date('Y-m-d H:i:s', $end_date),
-            'Y-m-d H:i:s'
-        );
-
-
-        // set orderby
-        $orderby = $this->request->getRequestParam('orderby');
-
-        switch ($orderby) {
-            case 'TXN_ID':
-                break;
-            case 'ATT_fname':
-                $orderby = 'Registration.Attendee.ATT_fname';
-                break;
-            case 'event_name':
-                $orderby = 'Registration.Event.EVT_name';
-                break;
-            default: // 'TXN_timestamp'
-                $orderby = 'TXN_timestamp';
-        }
-
-        $sort         = $this->request->getRequestParam('order', 'DESC');
-        $current_page = $this->request->getRequestParam('paged', 1, 'int');
-
-        $per_page = absint($per_page) ? $per_page : 10;
-        $per_page = $this->request->getRequestParam('perpage', $per_page, 'int');
-
-        $offset = ($current_page - 1) * $per_page;
-        $limit  = [$offset, $per_page];
-
-        $_where = [
-            'TXN_timestamp'          => ['BETWEEN', [$start_date, $end_date]],
-            'Registration.REG_count' => 1,
-        ];
-
-        $EVT_ID = $this->request->getRequestParam('EVT_ID', 0, 'int');
-        if ($EVT_ID) {
-            $_where['Registration.EVT_ID'] = $EVT_ID;
-        }
-
-        $search_term = $this->request->getRequestParam('s');
-        if ($search_term) {
-            $search_term = '%' . $search_term . '%';
-            $_where['OR']  = [
-                'Registration.Event.EVT_name'         => ['LIKE', $search_term],
-                'Registration.Event.EVT_desc'         => ['LIKE', $search_term],
-                'Registration.Event.EVT_short_desc'   => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_full_name' => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_fname'     => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_lname'     => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_short_bio' => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_email'     => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_address'   => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_address2'  => ['LIKE', $search_term],
-                'Registration.Attendee.ATT_city'      => ['LIKE', $search_term],
-                'Registration.REG_final_price'        => ['LIKE', $search_term],
-                'Registration.REG_code'               => ['LIKE', $search_term],
-                'Registration.REG_count'              => ['LIKE', $search_term],
-                'Registration.REG_group_size'         => ['LIKE', $search_term],
-                'Registration.Ticket.TKT_name'        => ['LIKE', $search_term],
-                'Registration.Ticket.TKT_description' => ['LIKE', $search_term],
-                'Payment.PAY_source'                  => ['LIKE', $search_term],
-                'Payment.Payment_Method.PMD_name'     => ['LIKE', $search_term],
-                'TXN_session_data'                    => ['LIKE', $search_term],
-                'Payment.PAY_txn_id_chq_nmbr'         => ['LIKE', $search_term],
-            ];
-        }
-
-        $status = $this->request->getRequestParam('status');
-        // failed transactions
-        $failed     = (! empty($status) && $status === 'failed' && ! $count) || ($count && $view === 'failed');
-        $abandoned  = (! empty($status) && $status === 'abandoned' && ! $count) || ($count && $view === 'abandoned');
-        $incomplete = (! empty($status) && $status === 'incomplete' && ! $count) || ($count && $view === 'incomplete');
-
-        if ($failed) {
-            $_where['STS_ID'] = EEM_Transaction::failed_status_code;
-        } elseif ($abandoned) {
-            $_where['STS_ID'] = EEM_Transaction::abandoned_status_code;
-        } elseif ($incomplete) {
-            $_where['STS_ID'] = EEM_Transaction::incomplete_status_code;
-        } else {
-            $_where['STS_ID']  = ['!=', EEM_Transaction::failed_status_code];
-            $_where['STS_ID*'] = ['!=', EEM_Transaction::abandoned_status_code];
-        }
-
-        $query_params = apply_filters(
-            'FHEE__Transactions_Admin_Page___get_transactions_query_params',
-            [
-                $_where,
-                'order_by'                 => [$orderby => $sort],
-                'limit'                    => $limit,
-                'default_where_conditions' => EEM_Base::default_where_conditions_this_only,
-            ],
-            $this->request->requestParams(),
-            $view,
-            $count
-        );
-
-        return $count
-            ? EEM_Transaction::instance()->count([$query_params[0]], 'TXN_ID', true)
-            : EEM_Transaction::instance()->get_all($query_params);
-    }
-
-
-    /**
-     * @throws EE_Error
-     * @throws InvalidArgumentException
-     * @throws InvalidDataTypeException
-     * @throws InvalidInterfaceException
-     * @throws ReflectionException
-     * @throws RuntimeException
-     * @since 4.9.79.p
-     */
-    public function recalculateLineItems()
-    {
-        $TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
-        /** @var EE_Transaction $transaction */
-        $transaction     = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
-        $success         = $transaction->recalculateLineItems();
-        $redirect_to = $this->request->getRequestParam('redirect_to');
-        $query_args = $redirect_to ? ['action' => $redirect_to, 'TXN_ID' => $TXN_ID,] : [];
-        $this->_redirect_after_action(
-            $success,
-            esc_html__('Transaction taxes and totals', 'event_espresso'),
-            esc_html__('recalculated', 'event_espresso'),
-            $query_args,
-            true
-        );
-    }
+	/**
+	 * @var EE_Transaction
+	 */
+	private $_transaction;
+
+	/**
+	 * @var EE_Session
+	 */
+	private $_session;
+
+	/**
+	 * @var array $_txn_status
+	 */
+	private static $_txn_status;
+
+	/**
+	 * @var array $_pay_status
+	 */
+	private static $_pay_status;
+
+	/**
+	 * @var array $_existing_reg_payment_REG_IDs
+	 */
+	protected $_existing_reg_payment_REG_IDs;
+
+
+	/**
+	 *    _init_page_props
+	 *
+	 * @return void
+	 */
+	protected function _init_page_props()
+	{
+		$this->page_slug        = TXN_PG_SLUG;
+		$this->page_label       = esc_html__('Transactions', 'event_espresso');
+		$this->_admin_base_url  = TXN_ADMIN_URL;
+		$this->_admin_base_path = TXN_ADMIN;
+	}
+
+
+	/**
+	 *    _ajax_hooks
+	 *
+	 * @return void
+	 */
+	protected function _ajax_hooks()
+	{
+		add_action('wp_ajax_espresso_apply_payment', [$this, 'apply_payments_or_refunds']);
+		add_action('wp_ajax_espresso_apply_refund', [$this, 'apply_payments_or_refunds']);
+		add_action('wp_ajax_espresso_delete_payment', [$this, 'delete_payment']);
+	}
+
+
+	/**
+	 *    _define_page_props
+	 *
+	 * @return void
+	 */
+	protected function _define_page_props()
+	{
+		$this->_admin_page_title = $this->page_label;
+		$this->_labels           = [
+			'buttons' => [
+				'add'    => esc_html__('Add New Transaction', 'event_espresso'),
+				'edit'   => esc_html__('Edit Transaction', 'event_espresso'),
+				'delete' => esc_html__('Delete Transaction', 'event_espresso'),
+			],
+		];
+	}
+
+
+	/**
+	 *        grab url requests and route them
+	 *
+	 * @access private
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function _set_page_routes()
+	{
+
+		$this->_set_transaction_status_array();
+		$TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
+
+		$this->_page_routes = [
+
+			'default' => [
+				'func'       => '_transactions_overview_list_table',
+				'capability' => 'ee_read_transactions',
+			],
+
+			'view_transaction' => [
+				'func'       => '_transaction_details',
+				'capability' => 'ee_read_transaction',
+				'obj_id'     => $TXN_ID,
+			],
+
+			'send_payment_reminder' => [
+				'func'       => '_send_payment_reminder',
+				'noheader'   => true,
+				'capability' => 'ee_send_message',
+			],
+
+			'espresso_apply_payment' => [
+				'func'       => 'apply_payments_or_refunds',
+				'noheader'   => true,
+				'capability' => 'ee_edit_payments',
+			],
+
+			'espresso_apply_refund' => [
+				'func'       => 'apply_payments_or_refunds',
+				'noheader'   => true,
+				'capability' => 'ee_edit_payments',
+			],
+
+			'espresso_delete_payment' => [
+				'func'       => 'delete_payment',
+				'noheader'   => true,
+				'capability' => 'ee_delete_payments',
+			],
+
+			'espresso_recalculate_line_items' => [
+				'func'       => 'recalculateLineItems',
+				'noheader'   => true,
+				'capability' => 'ee_edit_payments',
+			],
+
+		];
+	}
+
+
+	protected function _set_page_config()
+	{
+		$TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
+		$this->_page_config = [
+			'default'          => [
+				'nav'           => [
+					'label' => esc_html__('Overview', 'event_espresso'),
+					'order' => 10,
+				],
+				'list_table'    => 'EE_Admin_Transactions_List_Table',
+				'help_tabs'     => [
+					'transactions_overview_help_tab'                       => [
+						'title'    => esc_html__('Transactions Overview', 'event_espresso'),
+						'filename' => 'transactions_overview',
+					],
+					'transactions_overview_table_column_headings_help_tab' => [
+						'title'    => esc_html__('Transactions Table Column Headings', 'event_espresso'),
+						'filename' => 'transactions_overview_table_column_headings',
+					],
+					'transactions_overview_views_filters_help_tab'         => [
+						'title'    => esc_html__('Transaction Views & Filters & Search', 'event_espresso'),
+						'filename' => 'transactions_overview_views_filters_search',
+					],
+				],
+				/**
+				 * commented out because currently we are not displaying tips for transaction list table status but this
+				 * may change in a later iteration so want to keep the code for then.
+				 */
+				// 'qtips' => array( 'Transactions_List_Table_Tips' ),
+				'require_nonce' => false,
+			],
+			'view_transaction' => [
+				'nav'       => [
+					'label'      => esc_html__('View Transaction', 'event_espresso'),
+					'order'      => 5,
+					'url'        => $TXN_ID
+						? add_query_arg(['TXN_ID' => $TXN_ID], $this->_current_page_view_url)
+						: $this->_admin_base_url,
+					'persistent' => false,
+				],
+				'help_tabs' => [
+					'transactions_view_transaction_help_tab'                                              => [
+						'title'    => esc_html__('View Transaction', 'event_espresso'),
+						'filename' => 'transactions_view_transaction',
+					],
+					'transactions_view_transaction_transaction_details_table_help_tab'                    => [
+						'title'    => esc_html__('Transaction Details Table', 'event_espresso'),
+						'filename' => 'transactions_view_transaction_transaction_details_table',
+					],
+					'transactions_view_transaction_attendees_registered_help_tab'                         => [
+						'title'    => esc_html__('Attendees Registered', 'event_espresso'),
+						'filename' => 'transactions_view_transaction_attendees_registered',
+					],
+					'transactions_view_transaction_views_primary_registrant_billing_information_help_tab' => [
+						'title'    => esc_html__('Primary Registrant & Billing Information', 'event_espresso'),
+						'filename' => 'transactions_view_transaction_primary_registrant_billing_information',
+					],
+				],
+				'qtips'     => ['Transaction_Details_Tips'],
+				'metaboxes' => ['_transaction_details_metaboxes'],
+
+				'require_nonce' => false,
+			],
+		];
+	}
+
+
+	/**
+	 * The below methods aren't used by this class currently
+	 */
+	protected function _add_screen_options()
+	{
+		// noop
+	}
+
+
+	protected function _add_feature_pointers()
+	{
+		// noop
+	}
+
+
+	public function admin_init()
+	{
+		$EVT_ID = $this->request->getRequestParam('EVT_ID', 0, 'int');
+		$event_name = $this->request->getRequestParam('event_name');
+		$redirect_from = $this->request->getRequestParam('redirect_from', '', 'url');
+		// IF a registration was JUST added via the admin...
+		if ($EVT_ID && $event_name && $redirect_from) {
+			// then set a cookie so that we can block any attempts to use
+			// the back button as a way to enter another registration.
+			setcookie('ee_registration_added', $EVT_ID, time() + WEEK_IN_SECONDS, '/');
+			// and update the global
+			$_COOKIE['ee_registration_added'] = $EVT_ID;
+		}
+		EE_Registry::$i18n_js_strings['invalid_server_response'] = esc_html__(
+			'An error occurred! Your request may have been processed, but a valid response from the server was not received. Please refresh the page and try again.',
+			'event_espresso'
+		);
+		EE_Registry::$i18n_js_strings['error_occurred']          = esc_html__(
+			'An error occurred! Please refresh the page and try again.',
+			'event_espresso'
+		);
+		EE_Registry::$i18n_js_strings['txn_status_array']        = self::$_txn_status;
+		EE_Registry::$i18n_js_strings['pay_status_array']        = self::$_pay_status;
+		EE_Registry::$i18n_js_strings['payments_total']          = esc_html__('Payments Total', 'event_espresso');
+		EE_Registry::$i18n_js_strings['transaction_overpaid']    = esc_html__(
+			'This transaction has been overpaid ! Payments Total',
+			'event_espresso'
+		);
+	}
+
+
+	public function admin_notices()
+	{
+		// noop
+	}
+
+
+	public function admin_footer_scripts()
+	{
+		// noop
+	}
+
+
+	/**
+	 * _set_transaction_status_array
+	 * sets list of transaction statuses
+	 *
+	 * @access private
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _set_transaction_status_array()
+	{
+		self::$_txn_status = EEM_Transaction::instance()->status_array(true);
+	}
+
+
+	/**
+	 * get_transaction_status_array
+	 * return the transaction status array for wp_list_table
+	 *
+	 * @access public
+	 * @return array
+	 */
+	public function get_transaction_status_array()
+	{
+		return self::$_txn_status;
+	}
+
+
+	/**
+	 *    get list of payment statuses
+	 *
+	 * @access private
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	private function _get_payment_status_array()
+	{
+		self::$_pay_status                      = EEM_Payment::instance()->status_array(true);
+		$this->_template_args['payment_status'] = self::$_pay_status;
+	}
+
+
+	/**
+	 *    _add_screen_options_default
+	 *
+	 * @access protected
+	 * @return void
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _add_screen_options_default()
+	{
+		$this->_per_page_screen_option();
+	}
+
+
+	/**
+	 * load_scripts_styles
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function load_scripts_styles()
+	{
+		// enqueue style
+		wp_register_style(
+			'espresso_txn',
+			TXN_ASSETS_URL . 'espresso_transactions_admin.css',
+			[],
+			EVENT_ESPRESSO_VERSION
+		);
+		wp_enqueue_style('espresso_txn');
+		// scripts
+		wp_register_script(
+			'espresso_txn',
+			TXN_ASSETS_URL . 'espresso_transactions_admin.js',
+			[
+				'ee_admin_js',
+				'ee-datepicker',
+				'jquery-ui-datepicker',
+				'jquery-ui-draggable',
+				'ee-dialog',
+				'ee-accounting',
+				'ee-serialize-full-array',
+			],
+			EVENT_ESPRESSO_VERSION,
+			true
+		);
+		wp_enqueue_script('espresso_txn');
+	}
+
+
+	/**
+	 *    load_scripts_styles_view_transaction
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function load_scripts_styles_view_transaction()
+	{
+		// styles
+		wp_enqueue_style('espresso-ui-theme');
+	}
+
+
+	/**
+	 *    load_scripts_styles_default
+	 *
+	 * @access public
+	 * @return void
+	 */
+	public function load_scripts_styles_default()
+	{
+		// styles
+		wp_enqueue_style('espresso-ui-theme');
+	}
+
+
+	/**
+	 *    _set_list_table_views_default
+	 *
+	 * @access protected
+	 * @return void
+	 */
+	protected function _set_list_table_views_default()
+	{
+		$this->_views = [
+			'all'        => [
+				'slug'  => 'all',
+				'label' => esc_html__('View All Transactions', 'event_espresso'),
+				'count' => 0,
+			],
+			'abandoned'  => [
+				'slug'  => 'abandoned',
+				'label' => esc_html__('Abandoned Transactions', 'event_espresso'),
+				'count' => 0,
+			],
+			'incomplete' => [
+				'slug'  => 'incomplete',
+				'label' => esc_html__('Incomplete Transactions', 'event_espresso'),
+				'count' => 0,
+			],
+		];
+		if (
+			/**
+			 * Filters whether a link to the "Failed Transactions" list table
+			 * appears on the Transactions Admin Page list table.
+			 * List display can be turned back on via the following:
+			 * add_filter(
+			 *     'FHEE__Transactions_Admin_Page___set_list_table_views_default__display_failed_txns_list',
+			 *     '__return_true'
+			 * );
+			 *
+			 * @param boolean                 $display_failed_txns_list
+			 * @param Transactions_Admin_Page $this
+			 * @since 4.9.70.p
+			 */
+			apply_filters(
+				'FHEE__Transactions_Admin_Page___set_list_table_views_default__display_failed_txns_list',
+				false,
+				$this
+			)
+		) {
+			$this->_views['failed'] = [
+				'slug'  => 'failed',
+				'label' => esc_html__('Failed Transactions', 'event_espresso'),
+				'count' => 0,
+			];
+		}
+	}
+
+
+	/**
+	 * _set_transaction_object
+	 * This sets the _transaction property for the transaction details screen
+	 *
+	 * @access private
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws RuntimeException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _set_transaction_object()
+	{
+		if ($this->_transaction instanceof EE_Transaction) {
+			return;
+		} //get out we've already set the object
+
+		$TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
+
+		// get transaction object
+		$this->_transaction = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
+		$this->_session     = $this->_transaction instanceof EE_Transaction
+			? $this->_transaction->session_data()
+			: null;
+		if ($this->_transaction instanceof EE_Transaction) {
+			$this->_transaction->verify_abandoned_transaction_status();
+		}
+
+		if (! $this->_transaction instanceof EE_Transaction) {
+			$error_msg = sprintf(
+				esc_html__(
+					'An error occurred and the details for the transaction with the ID # %d could not be retrieved.',
+					'event_espresso'
+				),
+				$TXN_ID
+			);
+			EE_Error::add_error($error_msg, __FILE__, __FUNCTION__, __LINE__);
+		}
+	}
+
+
+	/**
+	 *    _transaction_legend_items
+	 *
+	 * @access protected
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _transaction_legend_items()
+	{
+		EE_Registry::instance()->load_helper('MSG_Template');
+		$items = [];
+
+		if (
+			EE_Registry::instance()->CAP->current_user_can(
+				'ee_read_global_messages',
+				'view_filtered_messages'
+			)
+		) {
+			$related_for_icon = EEH_MSG_Template::get_message_action_icon('see_notifications_for');
+			if (
+				is_array($related_for_icon)
+				&& isset($related_for_icon['css_class'], $related_for_icon['label'])
+			) {
+				$items['view_related_messages'] = [
+					'class' => $related_for_icon['css_class'],
+					'desc'  => $related_for_icon['label'],
+				];
+			}
+		}
+
+		$items = apply_filters(
+			'FHEE__Transactions_Admin_Page___transaction_legend_items__items',
+			array_merge(
+				$items,
+				[
+					'view_details'          => [
+						'class' => 'dashicons dashicons-cart',
+						'desc'  => esc_html__('View Transaction Details', 'event_espresso'),
+					],
+					'view_invoice'          => [
+						'class' => 'dashicons dashicons-media-spreadsheet',
+						'desc'  => esc_html__('View Transaction Invoice', 'event_espresso'),
+					],
+					'view_receipt'          => [
+						'class' => 'dashicons dashicons-media-default',
+						'desc'  => esc_html__('View Transaction Receipt', 'event_espresso'),
+					],
+					'view_registration'     => [
+						'class' => 'dashicons dashicons-clipboard',
+						'desc'  => esc_html__('View Registration Details', 'event_espresso'),
+					],
+					'payment_overview_link' => [
+						'class' => 'dashicons dashicons-money',
+						'desc'  => esc_html__('Make Payment on Frontend', 'event_espresso'),
+					],
+				]
+			)
+		);
+
+		if (
+			EEH_MSG_Template::is_mt_active('payment_reminder')
+			&& EE_Registry::instance()->CAP->current_user_can(
+				'ee_send_message',
+				'espresso_transactions_send_payment_reminder'
+			)
+		) {
+			$items['send_payment_reminder'] = [
+				'class' => 'dashicons dashicons-email-alt',
+				'desc'  => esc_html__('Send Payment Reminder', 'event_espresso'),
+			];
+		} else {
+			$items['blank*'] = [
+				'class' => '',
+				'desc'  => '',
+			];
+		}
+		$more_items = apply_filters(
+			'FHEE__Transactions_Admin_Page___transaction_legend_items__more_items',
+			[
+				'overpaid'   => [
+					'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::overpaid_status_code,
+					'desc'  => EEH_Template::pretty_status(
+						EEM_Transaction::overpaid_status_code,
+						false,
+						'sentence'
+					),
+				],
+				'complete'   => [
+					'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::complete_status_code,
+					'desc'  => EEH_Template::pretty_status(
+						EEM_Transaction::complete_status_code,
+						false,
+						'sentence'
+					),
+				],
+				'incomplete' => [
+					'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::incomplete_status_code,
+					'desc'  => EEH_Template::pretty_status(
+						EEM_Transaction::incomplete_status_code,
+						false,
+						'sentence'
+					),
+				],
+				'abandoned'  => [
+					'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::abandoned_status_code,
+					'desc'  => EEH_Template::pretty_status(
+						EEM_Transaction::abandoned_status_code,
+						false,
+						'sentence'
+					),
+				],
+				'failed'     => [
+					'class' => 'ee-status-legend ee-status-legend-' . EEM_Transaction::failed_status_code,
+					'desc'  => EEH_Template::pretty_status(
+						EEM_Transaction::failed_status_code,
+						false,
+						'sentence'
+					),
+				],
+			]
+		);
+
+		return array_merge($items, $more_items);
+	}
+
+
+	/**
+	 *    _transactions_overview_list_table
+	 *
+	 * @access protected
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _transactions_overview_list_table()
+	{
+		$this->_admin_page_title = esc_html__('Transactions', 'event_espresso');
+
+		$EVT_ID = $this->request->getRequestParam('EVT_ID', 0, 'int');
+		$event = EEM_Event::instance()->get_one_by_ID($EVT_ID);
+		$this->_template_args['admin_page_header'] = $event instanceof EE_Event
+			? sprintf(
+				esc_html__('%sViewing Transactions for the Event: %s%s', 'event_espresso'),
+				'<h3>',
+				'<a href="'
+				. EE_Admin_Page::add_query_args_and_nonce(
+					['action' => 'edit', 'post' => $event->ID()],
+					EVENTS_ADMIN_URL
+				)
+				. '" title="'
+				. esc_attr__('Click to Edit event', 'event_espresso')
+				. '">' . $event->name() . '</a>',
+				'</h3>'
+			)
+			: '';
+		$this->_template_args['after_list_table']  = $this->_display_legend($this->_transaction_legend_items());
+		$this->display_admin_list_table_page_with_no_sidebar();
+	}
+
+
+	/**
+	 *    _transaction_details
+	 * generates HTML for the View Transaction Details Admin page
+	 *
+	 * @access protected
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws RuntimeException
+	 * @throws ReflectionException
+	 */
+	protected function _transaction_details()
+	{
+		do_action('AHEE__Transactions_Admin_Page__transaction_details__start', $this->_transaction);
+
+		$this->_set_transaction_status_array();
+
+		$this->_template_args                      = [];
+		$this->_template_args['transactions_page'] = $this->_wp_page_slug;
+
+		$this->_set_transaction_object();
+
+		if (! $this->_transaction instanceof EE_Transaction) {
+			return;
+		}
+
+		$this->_template_args['txn_nmbr']['value'] = $this->_transaction->ID();
+		$this->_template_args['txn_nmbr']['label'] = esc_html__('Transaction Number', 'event_espresso');
+
+		$this->_template_args['txn_datetime']['value'] = $this->_transaction->get_i18n_datetime('TXN_timestamp');
+		$this->_template_args['txn_datetime']['label'] = esc_html__('Date', 'event_espresso');
+
+		$this->_template_args['txn_status']['value'] = self::$_txn_status[ $this->_transaction->status_ID() ];
+		$this->_template_args['txn_status']['label'] = esc_html__('Transaction Status', 'event_espresso');
+		$this->_template_args['txn_status']['class'] = 'status-' . $this->_transaction->status_ID();
+
+		$this->_template_args['grand_total'] = $this->_transaction->total();
+		$this->_template_args['total_paid']  = $this->_transaction->paid();
+
+		$amount_due                         = $this->_transaction->total() - $this->_transaction->paid();
+		$this->_template_args['amount_due'] = EEH_Template::format_currency(
+			$amount_due,
+			true
+		);
+		if (EE_Registry::instance()->CFG->currency->sign_b4) {
+			$this->_template_args['amount_due'] = EE_Registry::instance()->CFG->currency->sign
+												  . $this->_template_args['amount_due'];
+		} else {
+			$this->_template_args['amount_due'] .= EE_Registry::instance()->CFG->currency->sign;
+		}
+		$this->_template_args['amount_due_class'] = '';
+
+		if ($this->_transaction->paid() === $this->_transaction->total()) {
+			// paid in full
+			$this->_template_args['amount_due'] = false;
+		} elseif ($this->_transaction->paid() > $this->_transaction->total()) {
+			// overpaid
+			$this->_template_args['amount_due_class'] = 'txn-overview-no-payment-spn';
+		} elseif ($this->_transaction->total() > (float) 0) {
+			if ($this->_transaction->paid() > (float) 0) {
+				// monies owing
+				$this->_template_args['amount_due_class'] = 'txn-overview-part-payment-spn';
+			} elseif ($this->_transaction->paid() === (float) 0) {
+				// no payments made yet
+				$this->_template_args['amount_due_class'] = 'txn-overview-no-payment-spn';
+			}
+		} elseif ($this->_transaction->total() === (float) 0) {
+			// free event
+			$this->_template_args['amount_due'] = false;
+		}
+
+		$payment_method = $this->_transaction->payment_method();
+
+		$this->_template_args['method_of_payment_name'] = $payment_method instanceof EE_Payment_Method
+			? $payment_method->admin_name()
+			: esc_html__('Unknown', 'event_espresso');
+
+		$this->_template_args['currency_sign'] = EE_Registry::instance()->CFG->currency->sign;
+		// link back to overview
+		$this->_template_args['txn_overview_url'] = $this->request->getServerParam(
+			'HTTP_REFERER',
+			TXN_ADMIN_URL
+		);
+
+
+		// next link
+		$next_txn                                 = $this->_transaction->next(
+			null,
+			[['STS_ID' => ['!=', EEM_Transaction::failed_status_code]]],
+			'TXN_ID'
+		);
+		$this->_template_args['next_transaction'] = $next_txn
+			? $this->_next_link(
+				EE_Admin_Page::add_query_args_and_nonce(
+					['action' => 'view_transaction', 'TXN_ID' => $next_txn['TXN_ID']],
+					TXN_ADMIN_URL
+				),
+				'dashicons dashicons-arrow-right ee-icon-size-22'
+			)
+			: '';
+		// previous link
+		$previous_txn                                 = $this->_transaction->previous(
+			null,
+			[['STS_ID' => ['!=', EEM_Transaction::failed_status_code]]],
+			'TXN_ID'
+		);
+		$this->_template_args['previous_transaction'] = $previous_txn
+			? $this->_previous_link(
+				EE_Admin_Page::add_query_args_and_nonce(
+					['action' => 'view_transaction', 'TXN_ID' => $previous_txn['TXN_ID']],
+					TXN_ADMIN_URL
+				),
+				'dashicons dashicons-arrow-left ee-icon-size-22'
+			)
+			: '';
+
+		$EVT_ID        = $this->request->getRequestParam('EVT_ID', 0, 'int');
+		$event_name    = $this->request->getRequestParam('event_name');
+		$redirect_from = $this->request->getRequestParam('redirect_from', '', 'url');
+
+		// were we just redirected here after adding a new registration ???
+		if ($EVT_ID && $event_name && $redirect_from) {
+			if (
+				EE_Registry::instance()->CAP->current_user_can(
+					'ee_edit_registrations',
+					'espresso_registrations_new_registration',
+					$EVT_ID
+				)
+			) {
+				$this->_admin_page_title .= '<a id="add-new-registration" class="add-new-h2 button-primary" href="';
+				$this->_admin_page_title .= EE_Admin_Page::add_query_args_and_nonce(
+					[
+						'page'     => 'espresso_registrations',
+						'action'   => 'new_registration',
+						'return'   => 'default',
+						'TXN_ID'   => $this->_transaction->ID(),
+						'event_id' => $EVT_ID,
+					],
+					REG_ADMIN_URL
+				);
+				$this->_admin_page_title .= '">';
+
+				$this->_admin_page_title .= sprintf(
+					esc_html__('Add Another New Registration to Event: "%1$s" ?', 'event_espresso'),
+					htmlentities(urldecode($event_name), ENT_QUOTES, 'UTF-8')
+				);
+				$this->_admin_page_title .= '</a>';
+			}
+			EE_Registry::instance()->SSN->clear_session(__CLASS__, __FUNCTION__);
+		}
+		// grab messages at the last second
+		$this->_template_args['notices'] = EE_Error::get_notices();
+		// path to template
+		$template_path                             = TXN_TEMPLATE_PATH . 'txn_admin_details_header.template.php';
+		$this->_template_args['admin_page_header'] = EEH_Template::display_template(
+			$template_path,
+			$this->_template_args,
+			true
+		);
+
+		// the details template wrapper
+		$this->display_admin_page_with_sidebar();
+	}
+
+
+	/**
+	 *        _transaction_details_metaboxes
+	 *
+	 * @access protected
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws RuntimeException
+	 * @throws ReflectionException
+	 */
+	protected function _transaction_details_metaboxes()
+	{
+
+		$this->_set_transaction_object();
+
+		if (! $this->_transaction instanceof EE_Transaction) {
+			return;
+		}
+		add_meta_box(
+			'edit-txn-details-mbox',
+			esc_html__('Transaction Details', 'event_espresso'),
+			[$this, 'txn_details_meta_box'],
+			$this->_wp_page_slug,
+			'normal',
+			'high'
+		);
+		add_meta_box(
+			'edit-txn-attendees-mbox',
+			esc_html__('Attendees Registered in this Transaction', 'event_espresso'),
+			[$this, 'txn_attendees_meta_box'],
+			$this->_wp_page_slug,
+			'normal',
+			'high',
+			['TXN_ID' => $this->_transaction->ID()]
+		);
+		add_meta_box(
+			'edit-txn-registrant-mbox',
+			esc_html__('Primary Contact', 'event_espresso'),
+			[$this, 'txn_registrant_side_meta_box'],
+			$this->_wp_page_slug,
+			'side',
+			'high'
+		);
+		add_meta_box(
+			'edit-txn-billing-info-mbox',
+			esc_html__('Billing Information', 'event_espresso'),
+			[$this, 'txn_billing_info_side_meta_box'],
+			$this->_wp_page_slug,
+			'side',
+			'high'
+		);
+	}
+
+
+	/**
+	 * Callback for transaction actions metabox.
+	 *
+	 * @param EE_Transaction|null $transaction
+	 * @return string
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 */
+	public function getActionButtons(EE_Transaction $transaction = null)
+	{
+		$content = '';
+		$actions = [];
+		if (! $transaction instanceof EE_Transaction) {
+			return $content;
+		}
+		/** @var EE_Registration $primary_registration */
+		$primary_registration = $transaction->primary_registration();
+		$attendee             = $primary_registration instanceof EE_Registration
+			? $primary_registration->attendee()
+			: null;
+
+		if (
+			$attendee instanceof EE_Attendee
+			&& EE_Registry::instance()->CAP->current_user_can(
+				'ee_send_message',
+				'espresso_transactions_send_payment_reminder'
+			)
+		) {
+			$actions['payment_reminder'] =
+				EEH_MSG_Template::is_mt_active('payment_reminder')
+				&& $this->_transaction->status_ID() !== EEM_Transaction::complete_status_code
+				&& $this->_transaction->status_ID() !== EEM_Transaction::overpaid_status_code
+					? EEH_Template::get_button_or_link(
+						EE_Admin_Page::add_query_args_and_nonce(
+							[
+							'action'      => 'send_payment_reminder',
+							'TXN_ID'      => $this->_transaction->ID(),
+							'redirect_to' => 'view_transaction',
+							],
+							TXN_ADMIN_URL
+						),
+						esc_html__(' Send Payment Reminder', 'event_espresso'),
+						'button secondary-button',
+						'dashicons dashicons-email-alt'
+					)
+					: '';
+		}
+
+		if (
+			EE_Registry::instance()->CAP->current_user_can(
+				'ee_edit_payments',
+				'espresso_transactions_recalculate_line_items'
+			)
+		) {
+			$actions['recalculate_line_items'] = EEH_Template::get_button_or_link(
+				EE_Admin_Page::add_query_args_and_nonce(
+					[
+						'action'      => 'espresso_recalculate_line_items',
+						'TXN_ID'      => $this->_transaction->ID(),
+						'redirect_to' => 'view_transaction',
+					],
+					TXN_ADMIN_URL
+				),
+				esc_html__(' Recalculate Taxes and Total', 'event_espresso'),
+				'button secondary-button',
+				'dashicons dashicons-update'
+			);
+		}
+
+		if (
+			$primary_registration instanceof EE_Registration
+			&& EEH_MSG_Template::is_mt_active('receipt')
+		) {
+			$actions['receipt'] = EEH_Template::get_button_or_link(
+				$primary_registration->receipt_url(),
+				esc_html__('View Receipt', 'event_espresso'),
+				'button secondary-button',
+				'dashicons dashicons-media-default'
+			);
+		}
+
+		if (
+			$primary_registration instanceof EE_Registration
+			&& EEH_MSG_Template::is_mt_active('invoice')
+		) {
+			$actions['invoice'] = EEH_Template::get_button_or_link(
+				$primary_registration->invoice_url(),
+				esc_html__('View Invoice', 'event_espresso'),
+				'button secondary-button',
+				'dashicons dashicons-media-spreadsheet'
+			);
+		}
+		$actions = array_filter(
+			apply_filters('FHEE__Transactions_Admin_Page__getActionButtons__actions', $actions, $transaction)
+		);
+		if ($actions) {
+			$content = '<ul>';
+			$content .= '<li>' . implode('</li><li>', $actions) . '</li>';
+			$content .= '</uL>';
+		}
+		return $content;
+	}
+
+
+	/**
+	 * txn_details_meta_box
+	 * generates HTML for the Transaction main meta box
+	 *
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws RuntimeException
+	 * @throws ReflectionException
+	 */
+	public function txn_details_meta_box()
+	{
+		$this->_set_transaction_object();
+		$this->_template_args['TXN_ID']              = $this->_transaction->ID();
+		$this->_template_args['attendee']            =
+			$this->_transaction->primary_registration() instanceof EE_Registration
+				? $this->_transaction->primary_registration()->attendee()
+				: null;
+		$this->_template_args['can_edit_payments']   = EE_Registry::instance()->CAP->current_user_can(
+			'ee_edit_payments',
+			'apply_payment_or_refund_from_registration_details'
+		);
+		$this->_template_args['can_delete_payments'] = EE_Registry::instance()->CAP->current_user_can(
+			'ee_delete_payments',
+			'delete_payment_from_registration_details'
+		);
+
+		// get line table
+		EEH_Autoloader::register_line_item_display_autoloaders();
+		$Line_Item_Display                       = new EE_Line_Item_Display(
+			'admin_table',
+			'EE_Admin_Table_Line_Item_Display_Strategy'
+		);
+		$this->_template_args['line_item_table'] = $Line_Item_Display->display_line_item(
+			$this->_transaction->total_line_item()
+		);
+		$this->_template_args['REG_code']        =
+			$this->_transaction->primary_registration() instanceof EE_Registration
+				? $this->_transaction->primary_registration()->reg_code()
+				: null;
+		// process taxes
+		$taxes                         = $this->_transaction->line_items([['LIN_type' => EEM_Line_Item::type_tax]]);
+		$this->_template_args['taxes'] = ! empty($taxes) ? $taxes : false;
+
+		$this->_template_args['grand_total']     = EEH_Template::format_currency(
+			$this->_transaction->total(),
+			false,
+			false
+		);
+		$this->_template_args['grand_raw_total'] = $this->_transaction->total();
+		$this->_template_args['TXN_status']      = $this->_transaction->status_ID();
+
+		// process payment details
+		$payments = $this->_transaction->payments();
+		if (! empty($payments)) {
+			$this->_template_args['payments']              = $payments;
+			$this->_template_args['existing_reg_payments'] = $this->_get_registration_payment_IDs($payments);
+		} else {
+			$this->_template_args['payments']              = false;
+			$this->_template_args['existing_reg_payments'] = [];
+		}
+
+		$this->_template_args['edit_payment_url']   = add_query_arg(['action' => 'edit_payment'], TXN_ADMIN_URL);
+		$this->_template_args['delete_payment_url'] = add_query_arg(
+			['action' => 'espresso_delete_payment'],
+			TXN_ADMIN_URL
+		);
+
+		if (isset($txn_details['invoice_number'])) {
+			$this->_template_args['txn_details']['invoice_number']['value'] = $this->_template_args['REG_code'];
+			$this->_template_args['txn_details']['invoice_number']['label'] = esc_html__(
+				'Invoice Number',
+				'event_espresso'
+			);
+		}
+
+		$this->_template_args['txn_details']['registration_session']['value'] =
+			$this->_transaction->primary_registration() instanceof EE_Registration
+				? $this->_transaction->primary_registration()->session_ID()
+				: null;
+		$this->_template_args['txn_details']['registration_session']['label'] = esc_html__(
+			'Registration Session',
+			'event_espresso'
+		);
+
+		$this->_template_args['txn_details']['ip_address']['value'] = isset($this->_session['ip_address'])
+			? $this->_session['ip_address']
+			: '';
+		$this->_template_args['txn_details']['ip_address']['label'] = esc_html__(
+			'Transaction placed from IP',
+			'event_espresso'
+		);
+
+		$this->_template_args['txn_details']['user_agent']['value'] = isset($this->_session['user_agent'])
+			? $this->_session['user_agent']
+			: '';
+		$this->_template_args['txn_details']['user_agent']['label'] = esc_html__(
+			'Registrant User Agent',
+			'event_espresso'
+		);
+
+		$reg_steps = '<ul>';
+		foreach ($this->_transaction->reg_steps() as $reg_step => $reg_step_status) {
+			if ($reg_step_status === true) {
+				$reg_steps .= '<li style="color:#70cc50">'
+							  . sprintf(
+								  esc_html__('%1$s : Completed', 'event_espresso'),
+								  ucwords(str_replace('_', ' ', $reg_step))
+							  )
+							  . '</li>';
+			} elseif ($reg_step_status !== false && is_numeric($reg_step_status)) {
+				$reg_steps .= '<li style="color:#2EA2CC">'
+							  . sprintf(
+								  esc_html__('%1$s : Initiated %2$s', 'event_espresso'),
+								  ucwords(str_replace('_', ' ', $reg_step)),
+								  date(
+									  get_option('date_format') . ' ' . get_option('time_format'),
+									  $reg_step_status + (get_option('gmt_offset') * HOUR_IN_SECONDS)
+								  )
+							  )
+							  . '</li>';
+			} else {
+				$reg_steps .= '<li style="color:#E76700">'
+							  . sprintf(
+								  esc_html__('%1$s : Never Initiated', 'event_espresso'),
+								  ucwords(str_replace('_', ' ', $reg_step))
+							  )
+							  . '</li>';
+			}
+		}
+		$reg_steps                                                 .= '</ul>';
+		$this->_template_args['txn_details']['reg_steps']['value'] = $reg_steps;
+		$this->_template_args['txn_details']['reg_steps']['label'] = esc_html__(
+			'Registration Step Progress',
+			'event_espresso'
+		);
+
+
+		$this->_get_registrations_to_apply_payment_to();
+		$this->_get_payment_methods($payments);
+		$this->_get_payment_status_array();
+		$this->_get_reg_status_selection(); // sets up the template args for the reg status array for the transaction.
+
+		$this->_template_args['transaction_form_url']    = add_query_arg(
+			[
+				'action'  => 'edit_transaction',
+				'process' => 'transaction',
+			],
+			TXN_ADMIN_URL
+		);
+		$this->_template_args['apply_payment_form_url']  = add_query_arg(
+			[
+				'page'   => 'espresso_transactions',
+				'action' => 'espresso_apply_payment',
+			],
+			WP_AJAX_URL
+		);
+		$this->_template_args['delete_payment_form_url'] = add_query_arg(
+			[
+				'page'   => 'espresso_transactions',
+				'action' => 'espresso_delete_payment',
+			],
+			WP_AJAX_URL
+		);
+
+		$this->_template_args['action_buttons'] = $this->getActionButtons($this->_transaction);
+
+		// 'espresso_delete_payment_nonce'
+
+		$template_path = TXN_TEMPLATE_PATH . 'txn_admin_details_main_meta_box_txn_details.template.php';
+		echo EEH_Template::display_template($template_path, $this->_template_args, true);
+	}
+
+
+	/**
+	 * _get_registration_payment_IDs
+	 *    generates an array of Payment IDs and their corresponding Registration IDs
+	 *
+	 * @access protected
+	 * @param EE_Payment[] $payments
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _get_registration_payment_IDs($payments = [])
+	{
+		$existing_reg_payments = [];
+		// get all reg payments for these payments
+		$reg_payments = EEM_Registration_Payment::instance()->get_all(
+			[
+				[
+					'PAY_ID' => [
+						'IN',
+						array_keys($payments),
+					],
+				],
+			]
+		);
+		if (! empty($reg_payments)) {
+			foreach ($payments as $payment) {
+				if (! $payment instanceof EE_Payment) {
+					continue;
+				} elseif (! isset($existing_reg_payments[ $payment->ID() ])) {
+					$existing_reg_payments[ $payment->ID() ] = [];
+				}
+				foreach ($reg_payments as $reg_payment) {
+					if (
+						$reg_payment instanceof EE_Registration_Payment
+						&& $reg_payment->payment_ID() === $payment->ID()
+					) {
+						$existing_reg_payments[ $payment->ID() ][] = $reg_payment->registration_ID();
+					}
+				}
+			}
+		}
+
+		return $existing_reg_payments;
+	}
+
+
+	/**
+	 * _get_registrations_to_apply_payment_to
+	 *    generates HTML for displaying a series of checkboxes in the admin payment modal window
+	 * which allows the admin to only apply the payment to the specific registrations
+	 *
+	 * @access protected
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _get_registrations_to_apply_payment_to()
+	{
+		// we want any registration with an active status (ie: not deleted or cancelled)
+		$query_params                      = [
+			[
+				'STS_ID' => [
+					'IN',
+					[
+						EEM_Registration::status_id_approved,
+						EEM_Registration::status_id_pending_payment,
+						EEM_Registration::status_id_not_approved,
+					],
+				],
+			],
+		];
+		$registrations_to_apply_payment_to = EEH_HTML::br() . EEH_HTML::div(
+			'',
+			'txn-admin-apply-payment-to-registrations-dv',
+			'',
+			'clear: both; margin: 1.5em 0 0; display: none;'
+		);
+		$registrations_to_apply_payment_to .= EEH_HTML::br() . EEH_HTML::div('', '', 'admin-primary-mbox-tbl-wrap');
+		$registrations_to_apply_payment_to .= EEH_HTML::table('', '', 'admin-primary-mbox-tbl');
+		$registrations_to_apply_payment_to .= EEH_HTML::thead(
+			EEH_HTML::tr(
+				EEH_HTML::th(esc_html__('ID', 'event_espresso')) .
+				EEH_HTML::th(esc_html__('Registrant', 'event_espresso')) .
+				EEH_HTML::th(esc_html__('Ticket', 'event_espresso')) .
+				EEH_HTML::th(esc_html__('Event', 'event_espresso')) .
+				EEH_HTML::th(esc_html__('Paid', 'event_espresso'), '', 'txn-admin-payment-paid-td jst-cntr') .
+				EEH_HTML::th(esc_html__('Owing', 'event_espresso'), '', 'txn-admin-payment-owing-td jst-cntr') .
+				EEH_HTML::th(esc_html__('Apply', 'event_espresso'), '', 'jst-cntr')
+			)
+		);
+		$registrations_to_apply_payment_to .= EEH_HTML::tbody();
+		// get registrations for TXN
+		$registrations         = $this->_transaction->registrations($query_params);
+		$existing_reg_payments = $this->_template_args['existing_reg_payments'];
+		foreach ($registrations as $registration) {
+			if ($registration instanceof EE_Registration) {
+				$attendee_name                     = $registration->attendee() instanceof EE_Attendee
+					? $registration->attendee()->full_name()
+					: esc_html__('Unknown Attendee', 'event_espresso');
+				$owing                             = $registration->final_price() - $registration->paid();
+				$taxable                           = $registration->ticket()->taxable()
+					? ' <span class="smaller-text lt-grey-text"> ' . esc_html__('+ tax', 'event_espresso') . '</span>'
+					: '';
+				$checked                           = empty($existing_reg_payments)
+													 || in_array($registration->ID(), $existing_reg_payments, true)
+					? ' checked="checked"'
+					: '';
+				$disabled                          = $registration->final_price() > 0 ? '' : ' disabled';
+				$registrations_to_apply_payment_to .= EEH_HTML::tr(
+					EEH_HTML::td($registration->ID()) .
+					EEH_HTML::td($attendee_name) .
+					EEH_HTML::td(
+						$registration->ticket()->name() . ' : ' . $registration->ticket()->pretty_price() . $taxable
+					) .
+					EEH_HTML::td($registration->event_name()) .
+					EEH_HTML::td($registration->pretty_paid(), '', 'txn-admin-payment-paid-td jst-cntr') .
+					EEH_HTML::td(
+						EEH_Template::format_currency($owing),
+						'',
+						'txn-admin-payment-owing-td jst-cntr'
+					) .
+					EEH_HTML::td(
+						'<input type="checkbox" value="' . $registration->ID()
+						. '" name="txn_admin_payment[registrations]"'
+						. $checked . $disabled . '>',
+						'',
+						'jst-cntr'
+					),
+					'apply-payment-registration-row-' . $registration->ID()
+				);
+			}
+		}
+		$registrations_to_apply_payment_to                         .= EEH_HTML::tbodyx();
+		$registrations_to_apply_payment_to                         .= EEH_HTML::tablex();
+		$registrations_to_apply_payment_to                         .= EEH_HTML::divx();
+		$registrations_to_apply_payment_to                         .= EEH_HTML::p(
+			esc_html__(
+				'The payment will only be applied to the registrations that have a check mark in their corresponding check box. Checkboxes for free registrations have been disabled.',
+				'event_espresso'
+			),
+			'',
+			'clear description'
+		);
+		$registrations_to_apply_payment_to                         .= EEH_HTML::divx();
+		$this->_template_args['registrations_to_apply_payment_to'] = $registrations_to_apply_payment_to;
+	}
+
+
+	/**
+	 * _get_reg_status_selection
+	 *
+	 * @return void
+	 * @throws EE_Error
+	 * @todo   this will need to be adjusted either once MER comes along OR we move default reg status to tickets
+	 *         instead of events.
+	 * @access protected
+	 */
+	protected function _get_reg_status_selection()
+	{
+		// first get all possible statuses
+		$statuses = EEM_Registration::reg_status_array([], true);
+		// let's add a "don't change" option.
+		$status_array['NAN']                                 = esc_html__('Leave the Same', 'event_espresso');
+		$status_array                                        = array_merge($status_array, $statuses);
+		$this->_template_args['status_change_select']        = EEH_Form_Fields::select_input(
+			'txn_reg_status_change[reg_status]',
+			$status_array,
+			'NAN',
+			'id="txn-admin-payment-reg-status-inp"',
+			'txn-reg-status-change-reg-status'
+		);
+		$this->_template_args['delete_status_change_select'] = EEH_Form_Fields::select_input(
+			'delete_txn_reg_status_change[reg_status]',
+			$status_array,
+			'NAN',
+			'delete-txn-admin-payment-reg-status-inp',
+			'delete-txn-reg-status-change-reg-status'
+		);
+	}
+
+
+	/**
+	 *    _get_payment_methods
+	 * Gets all the payment methods available generally, or the ones that are already
+	 * selected on these payments (in case their payment methods are no longer active).
+	 * Has the side-effect of updating the template args' payment_methods item
+	 *
+	 * @access private
+	 * @param EE_Payment[] to show on this page
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	private function _get_payment_methods($payments = [])
+	{
+		$payment_methods_of_payments = [];
+		foreach ($payments as $payment) {
+			if ($payment instanceof EE_Payment) {
+				$payment_methods_of_payments[] = $payment->ID();
+			}
+		}
+		if ($payment_methods_of_payments) {
+			$query_args = [
+				[
+					'OR*payment_method_for_payment' => [
+						'PMD_ID'    => ['IN', $payment_methods_of_payments],
+						'PMD_scope' => ['LIKE', '%' . EEM_Payment_Method::scope_admin . '%'],
+					],
+				],
+			];
+		} else {
+			$query_args = [['PMD_scope' => ['LIKE', '%' . EEM_Payment_Method::scope_admin . '%']]];
+		}
+		$this->_template_args['payment_methods'] = EEM_Payment_Method::instance()->get_all($query_args);
+	}
+
+
+	/**
+	 * txn_attendees_meta_box
+	 *    generates HTML for the Attendees Transaction main meta box
+	 *
+	 * @access public
+	 * @param WP_Post $post
+	 * @param array   $metabox
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function txn_attendees_meta_box($post, $metabox = ['args' => []])
+	{
+
+		/** @noinspection NonSecureExtractUsageInspection */
+		extract($metabox['args']);
+		$this->_template_args['post']            = $post;
+		$this->_template_args['event_attendees'] = [];
+		// process items in cart
+		$line_items = $this->_transaction->get_many_related(
+			'Line_Item',
+			[['LIN_type' => 'line-item']]
+		);
+		if (! empty($line_items)) {
+			foreach ($line_items as $item) {
+				if ($item instanceof EE_Line_Item) {
+					switch ($item->OBJ_type()) {
+						case 'Event':
+							break;
+						case 'Ticket':
+							$ticket = $item->ticket();
+							// right now we're only handling tickets here.
+							// Cause its expected that only tickets will have attendees right?
+							if (! $ticket instanceof EE_Ticket) {
+								break;
+							}
+							try {
+								$event_name = $ticket->get_event_name();
+							} catch (Exception $e) {
+								EE_Error::add_error($e->getMessage(), __FILE__, __FUNCTION__, __LINE__);
+								$event_name = esc_html__('Unknown Event', 'event_espresso');
+							}
+							$event_name   .= ' - ' . $item->name();
+							$ticket_price = EEH_Template::format_currency($item->unit_price());
+							// now get all of the registrations for this transaction that use this ticket
+							$registrations = $ticket->registrations(
+								[['TXN_ID' => $this->_transaction->ID()]]
+							);
+							foreach ($registrations as $registration) {
+								if (! $registration instanceof EE_Registration) {
+									break;
+								}
+								$this->_template_args['event_attendees'][ $registration->ID() ]['STS_ID']
+									= $registration->status_ID();
+								$this->_template_args['event_attendees'][ $registration->ID() ]['att_num']
+									= $registration->count();
+								$this->_template_args['event_attendees'][ $registration->ID() ]['event_ticket_name']
+									= $event_name;
+								$this->_template_args['event_attendees'][ $registration->ID() ]['ticket_price']
+									= $ticket_price;
+								// attendee info
+								$attendee = $registration->get_first_related('Attendee');
+								if ($attendee instanceof EE_Attendee) {
+									$this->_template_args['event_attendees'][ $registration->ID() ]['att_id']
+										= $attendee->ID();
+									$this->_template_args['event_attendees'][ $registration->ID() ]['attendee']
+										= $attendee->full_name();
+									$this->_template_args['event_attendees'][ $registration->ID() ]['email']
+										= '<a href="mailto:' . $attendee->email() . '?subject=' . $event_name
+										  . esc_html__(
+											  ' Event',
+											  'event_espresso'
+										  )
+										  . '">' . $attendee->email() . '</a>';
+									$this->_template_args['event_attendees'][ $registration->ID() ]['address']
+										= EEH_Address::format($attendee, 'inline', false, false);
+								} else {
+									$this->_template_args['event_attendees'][ $registration->ID() ]['att_id']   = '';
+									$this->_template_args['event_attendees'][ $registration->ID() ]['attendee'] = '';
+									$this->_template_args['event_attendees'][ $registration->ID() ]['email']    = '';
+									$this->_template_args['event_attendees'][ $registration->ID() ]['address']  = '';
+								}
+							}
+							break;
+					}
+				}
+			}
+
+			$this->_template_args['transaction_form_url'] = add_query_arg(
+				[
+					'action'  => 'edit_transaction',
+					'process' => 'attendees',
+				],
+				TXN_ADMIN_URL
+			);
+			echo EEH_Template::display_template(
+				TXN_TEMPLATE_PATH . 'txn_admin_details_main_meta_box_attendees.template.php',
+				$this->_template_args,
+				true
+			);
+		} else {
+			printf(
+				esc_html__(
+					'%1$sFor some reason, there are no attendees registered for this transaction. Likely the registration was abandoned in process.%2$s',
+					'event_espresso'
+				),
+				'<p class="important-notice">',
+				'</p>'
+			);
+		}
+	}
+
+
+	/**
+	 * txn_registrant_side_meta_box
+	 * generates HTML for the Edit Transaction side meta box
+	 *
+	 * @access public
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	public function txn_registrant_side_meta_box()
+	{
+		$primary_att = $this->_transaction->primary_registration() instanceof EE_Registration
+			? $this->_transaction->primary_registration()->get_first_related('Attendee')
+			: null;
+		if (! $primary_att instanceof EE_Attendee) {
+			$this->_template_args['no_attendee_message'] = esc_html__(
+				'There is no attached contact for this transaction.  The transaction either failed due to an error or was abandoned.',
+				'event_espresso'
+			);
+			$primary_att                           = EEM_Attendee::instance()->create_default_object();
+		}
+		$this->_template_args['ATT_ID']            = $primary_att->ID();
+		$this->_template_args['prime_reg_fname']   = $primary_att->fname();
+		$this->_template_args['prime_reg_lname']   = $primary_att->lname();
+		$this->_template_args['prime_reg_email']   = $primary_att->email();
+		$this->_template_args['prime_reg_phone']   = $primary_att->phone();
+		$this->_template_args['edit_attendee_url'] = EE_Admin_Page::add_query_args_and_nonce(
+			[
+				'action' => 'edit_attendee',
+				'post'   => $primary_att->ID(),
+			],
+			REG_ADMIN_URL
+		);
+		// get formatted address for registrant
+		$this->_template_args['formatted_address'] = EEH_Address::format($primary_att);
+		echo EEH_Template::display_template(
+			TXN_TEMPLATE_PATH . 'txn_admin_details_side_meta_box_registrant.template.php',
+			$this->_template_args,
+			true
+		);
+	}
+
+
+	/**
+	 * txn_billing_info_side_meta_box
+	 *    generates HTML for the Edit Transaction side meta box
+	 *
+	 * @access public
+	 * @return void
+	 * @throws DomainException
+	 * @throws EE_Error
+	 * @throws ReflectionException
+	 */
+	public function txn_billing_info_side_meta_box()
+	{
+
+		$this->_template_args['billing_form']     = $this->_transaction->billing_info();
+		$this->_template_args['billing_form_url'] = add_query_arg(
+			['action' => 'edit_transaction', 'process' => 'billing'],
+			TXN_ADMIN_URL
+		);
+
+		$template_path = TXN_TEMPLATE_PATH . 'txn_admin_details_side_meta_box_billing_info.template.php';
+		echo EEH_Template::display_template($template_path, $this->_template_args, true);
+	}
+
+
+	/**
+	 * apply_payments_or_refunds
+	 *    registers a payment or refund made towards a transaction
+	 *
+	 * @access public
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function apply_payments_or_refunds()
+	{
+		$json_response_data = ['return_data' => false];
+		$valid_data         = $this->_validate_payment_request_data();
+		$has_access         = EE_Registry::instance()->CAP->current_user_can(
+			'ee_edit_payments',
+			'apply_payment_or_refund_from_registration_details'
+		);
+		if (! empty($valid_data) && $has_access) {
+			$PAY_ID = $valid_data['PAY_ID'];
+			// save  the new payment
+			$payment = $this->_create_payment_from_request_data($valid_data);
+			// get the TXN for this payment
+			$transaction = $payment->transaction();
+			// verify transaction
+			if ($transaction instanceof EE_Transaction) {
+				// calculate_total_payments_and_update_status
+				$this->_process_transaction_payments($transaction);
+				$REG_IDs = $this->_get_REG_IDs_to_apply_payment_to($payment);
+				$this->_remove_existing_registration_payments($payment, $PAY_ID);
+				// apply payment to registrations (if applicable)
+				if (! empty($REG_IDs)) {
+					$this->_update_registration_payments($transaction, $payment, $REG_IDs);
+					$this->_maybe_send_notifications();
+					// now process status changes for the same registrations
+					$this->_process_registration_status_change($transaction, $REG_IDs);
+				}
+				$this->_maybe_send_notifications($payment);
+				// prepare to render page
+				$json_response_data['return_data'] = $this->_build_payment_json_response($payment, $REG_IDs);
+				do_action(
+					'AHEE__Transactions_Admin_Page__apply_payments_or_refund__after_recording',
+					$transaction,
+					$payment
+				);
+			} else {
+				EE_Error::add_error(
+					esc_html__(
+						'A valid Transaction for this payment could not be retrieved.',
+						'event_espresso'
+					),
+					__FILE__,
+					__FUNCTION__,
+					__LINE__
+				);
+			}
+		} elseif ($has_access) {
+			EE_Error::add_error(
+				esc_html__(
+					'The payment form data could not be processed. Please try again.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		} else {
+			EE_Error::add_error(
+				esc_html__(
+					'You do not have access to apply payments or refunds to a registration.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+		$notices              = EE_Error::get_notices(
+			false,
+			false,
+			false
+		);
+		$this->_template_args = [
+			'data'    => $json_response_data,
+			'error'   => $notices['errors'],
+			'success' => $notices['success'],
+		];
+		$this->_return_json();
+	}
+
+
+	/**
+	 * _validate_payment_request_data
+	 *
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _validate_payment_request_data()
+	{
+		if (! $this->request->requestParamIsSet('txn_admin_payment')) {
+			return [];
+		}
+		$payment_form = $this->_generate_payment_form_section();
+		try {
+			if ($payment_form->was_submitted()) {
+				$payment_form->receive_form_submission();
+				if (! $payment_form->is_valid()) {
+					$submission_error_messages = [];
+					foreach ($payment_form->get_validation_errors_accumulated() as $validation_error) {
+						if ($validation_error instanceof EE_Validation_Error) {
+							$form_input = $validation_error->get_form_section();
+							$submission_error_messages[] = sprintf(
+								_x('%s : %s', 'Form Section Name : Form Validation Error', 'event_espresso'),
+								$form_input instanceof EE_Form_Input_Base ? $form_input->html_label_text() : '',
+								$validation_error->getMessage()
+							);
+						}
+					}
+					EE_Error::add_error(
+						implode('<br />', $submission_error_messages),
+						__FILE__,
+						__FUNCTION__,
+						__LINE__
+					);
+					return [];
+				}
+			}
+		} catch (EE_Error $e) {
+			EE_Error::add_error($e->getMessage(), __FILE__, __FUNCTION__, __LINE__);
+			return [];
+		}
+
+		return $payment_form->valid_data();
+	}
+
+
+	/**
+	 * _generate_payment_form_section
+	 *
+	 * @return EE_Form_Section_Proper
+	 * @throws EE_Error
+	 */
+	protected function _generate_payment_form_section()
+	{
+		return new EE_Form_Section_Proper(
+			[
+				'name'        => 'txn_admin_payment',
+				'subsections' => [
+					'PAY_ID'          => new EE_Text_Input(
+						[
+							'default'               => 0,
+							'required'              => false,
+							'html_label_text'       => esc_html__('Payment ID', 'event_espresso'),
+							'validation_strategies' => [new EE_Int_Normalization()],
+						]
+					),
+					'TXN_ID'          => new EE_Text_Input(
+						[
+							'default'               => 0,
+							'required'              => true,
+							'html_label_text'       => esc_html__('Transaction ID', 'event_espresso'),
+							'validation_strategies' => [new EE_Int_Normalization()],
+						]
+					),
+					'type'            => new EE_Text_Input(
+						[
+							'default'               => 1,
+							'required'              => true,
+							'html_label_text'       => esc_html__('Payment or Refund', 'event_espresso'),
+							'validation_strategies' => [new EE_Int_Normalization()],
+						]
+					),
+					'amount'          => new EE_Text_Input(
+						[
+							'default'               => 0,
+							'required'              => true,
+							'html_label_text'       => esc_html__('Payment amount', 'event_espresso'),
+							'validation_strategies' => [new EE_Float_Normalization()],
+						]
+					),
+					'status'          => new EE_Text_Input(
+						[
+							'default'         => EEM_Payment::status_id_approved,
+							'required'        => true,
+							'html_label_text' => esc_html__('Payment status', 'event_espresso'),
+						]
+					),
+					'PMD_ID'          => new EE_Text_Input(
+						[
+							'default'               => 2,
+							'required'              => true,
+							'html_label_text'       => esc_html__('Payment Method', 'event_espresso'),
+							'validation_strategies' => [new EE_Int_Normalization()],
+						]
+					),
+					'date'            => new EE_Text_Input(
+						[
+							'default'         => time(),
+							'required'        => true,
+							'html_label_text' => esc_html__('Payment date', 'event_espresso'),
+						]
+					),
+					'txn_id_chq_nmbr' => new EE_Text_Input(
+						[
+							'default'               => '',
+							'required'              => false,
+							'html_label_text'       => esc_html__('Transaction or Cheque Number', 'event_espresso'),
+							'validation_strategies' => [
+								new EE_Max_Length_Validation_Strategy(
+									esc_html__('Input too long', 'event_espresso'),
+									100
+								),
+							],
+						]
+					),
+					'po_number'       => new EE_Text_Input(
+						[
+							'default'               => '',
+							'required'              => false,
+							'html_label_text'       => esc_html__('Purchase Order Number', 'event_espresso'),
+							'validation_strategies' => [
+								new EE_Max_Length_Validation_Strategy(
+									esc_html__('Input too long', 'event_espresso'),
+									100
+								),
+							],
+						]
+					),
+					'accounting'      => new EE_Text_Input(
+						[
+							'default'               => '',
+							'required'              => false,
+							'html_label_text'       => esc_html__('Extra Field for Accounting', 'event_espresso'),
+							'validation_strategies' => [
+								new EE_Max_Length_Validation_Strategy(
+									esc_html__('Input too long', 'event_espresso'),
+									100
+								),
+							],
+						]
+					),
+				],
+			]
+		);
+	}
+
+
+	/**
+	 * _create_payment_from_request_data
+	 *
+	 * @param array $valid_data
+	 * @return EE_Payment
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _create_payment_from_request_data($valid_data)
+	{
+		$PAY_ID = $valid_data['PAY_ID'];
+		// get payment amount
+		$amount = $valid_data['amount'] ? abs($valid_data['amount']) : 0;
+		// payments have a type value of 1 and refunds have a type value of -1
+		// so multiplying amount by type will give a positive value for payments, and negative values for refunds
+		$amount = $valid_data['type'] < 0 ? $amount * -1 : $amount;
+		// for some reason the date string coming in has extra spaces between the date and time.  This fixes that.
+		$date    = $valid_data['date']
+			? preg_replace('/\s+/', ' ', $valid_data['date'])
+			: date('Y-m-d g:i a', current_time('timestamp'));
+		$payment = EE_Payment::new_instance(
+			[
+				'TXN_ID'              => $valid_data['TXN_ID'],
+				'STS_ID'              => $valid_data['status'],
+				'PAY_timestamp'       => $date,
+				'PAY_source'          => EEM_Payment_Method::scope_admin,
+				'PMD_ID'              => $valid_data['PMD_ID'],
+				'PAY_amount'          => $amount,
+				'PAY_txn_id_chq_nmbr' => $valid_data['txn_id_chq_nmbr'],
+				'PAY_po_number'       => $valid_data['po_number'],
+				'PAY_extra_accntng'   => $valid_data['accounting'],
+				'PAY_details'         => $valid_data,
+				'PAY_ID'              => $PAY_ID,
+			],
+			'',
+			['Y-m-d', 'g:i a']
+		);
+
+		if (! $payment->save()) {
+			EE_Error::add_error(
+				sprintf(
+					esc_html__('Payment %1$d has not been successfully saved to the database.', 'event_espresso'),
+					$payment->ID()
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+
+		return $payment;
+	}
+
+
+	/**
+	 * _process_transaction_payments
+	 *
+	 * @param EE_Transaction $transaction
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _process_transaction_payments(EE_Transaction $transaction)
+	{
+		/** @type EE_Transaction_Payments $transaction_payments */
+		$transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
+		// update the transaction with this payment
+		if ($transaction_payments->calculate_total_payments_and_update_status($transaction)) {
+			EE_Error::add_success(
+				esc_html__(
+					'The payment has been processed successfully.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		} else {
+			EE_Error::add_error(
+				esc_html__(
+					'The payment was processed successfully but the amount paid for the transaction was not updated.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+	}
+
+
+	/**
+	 * _get_REG_IDs_to_apply_payment_to
+	 * returns a list of registration IDs that the payment will apply to
+	 *
+	 * @param EE_Payment $payment
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _get_REG_IDs_to_apply_payment_to(EE_Payment $payment)
+	{
+		// grab array of IDs for specific registrations to apply changes to
+		$REG_IDs = $this->request->getRequestParam('txn_admin_payment[registrations]', [], 'int', true);
+		// nothing specified ? then get all reg IDs
+		if (empty($REG_IDs)) {
+			$registrations = $payment->transaction()->registrations();
+			$REG_IDs       = ! empty($registrations)
+				? array_keys($registrations)
+				: $this->_get_existing_reg_payment_REG_IDs($payment);
+		}
+
+		// ensure that REG_IDs are integers and NOT strings
+		return array_map('intval', $REG_IDs);
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function existing_reg_payment_REG_IDs()
+	{
+		return $this->_existing_reg_payment_REG_IDs;
+	}
+
+
+	/**
+	 * @param array $existing_reg_payment_REG_IDs
+	 */
+	public function set_existing_reg_payment_REG_IDs($existing_reg_payment_REG_IDs = null)
+	{
+		$this->_existing_reg_payment_REG_IDs = $existing_reg_payment_REG_IDs;
+	}
+
+
+	/**
+	 * _get_existing_reg_payment_REG_IDs
+	 * returns a list of registration IDs that the payment is currently related to
+	 * as recorded in the database
+	 *
+	 * @param EE_Payment $payment
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _get_existing_reg_payment_REG_IDs(EE_Payment $payment)
+	{
+		if ($this->existing_reg_payment_REG_IDs() === null) {
+			// let's get any existing reg payment records for this payment
+			$existing_reg_payment_REG_IDs = $payment->get_many_related('Registration');
+			// but we only want the REG IDs, so grab the array keys
+			$existing_reg_payment_REG_IDs = ! empty($existing_reg_payment_REG_IDs)
+				? array_keys($existing_reg_payment_REG_IDs)
+				: [];
+			$this->set_existing_reg_payment_REG_IDs($existing_reg_payment_REG_IDs);
+		}
+
+		return $this->existing_reg_payment_REG_IDs();
+	}
+
+
+	/**
+	 * _remove_existing_registration_payments
+	 * this calculates the difference between existing relations
+	 * to the supplied payment and the new list registration IDs,
+	 * removes any related registrations that no longer apply,
+	 * and then updates the registration paid fields
+	 *
+	 * @param EE_Payment $payment
+	 * @param int        $PAY_ID
+	 * @return bool;
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _remove_existing_registration_payments(EE_Payment $payment, $PAY_ID = 0)
+	{
+		// newly created payments will have nothing recorded for $PAY_ID
+		if (absint($PAY_ID) === 0) {
+			return false;
+		}
+		$existing_reg_payment_REG_IDs = $this->_get_existing_reg_payment_REG_IDs($payment);
+		if (empty($existing_reg_payment_REG_IDs)) {
+			return false;
+		}
+		/** @type EE_Transaction_Payments $transaction_payments */
+		$transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
+
+		return $transaction_payments->delete_registration_payments_and_update_registrations(
+			$payment,
+			[
+				[
+					'PAY_ID' => $payment->ID(),
+					'REG_ID' => ['IN', $existing_reg_payment_REG_IDs],
+				],
+			]
+		);
+	}
+
+
+	/**
+	 * _update_registration_payments
+	 * this applies the payments to the selected registrations
+	 * but only if they have not already been paid for
+	 *
+	 * @param EE_Transaction $transaction
+	 * @param EE_Payment     $payment
+	 * @param array          $REG_IDs
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _update_registration_payments(
+		EE_Transaction $transaction,
+		EE_Payment $payment,
+		$REG_IDs = []
+	) {
+		// we can pass our own custom set of registrations to EE_Payment_Processor::process_registration_payments()
+		// so let's do that using our set of REG_IDs from the form
+		$registration_query_where_params = [
+			'REG_ID' => ['IN', $REG_IDs],
+		];
+		// but add in some conditions regarding payment,
+		// so that we don't apply payments to registrations that are free or have already been paid for
+		// but ONLY if the payment is NOT a refund ( ie: the payment amount is not negative )
+		if (! $payment->is_a_refund()) {
+			$registration_query_where_params['REG_final_price']  = ['!=', 0];
+			$registration_query_where_params['REG_final_price*'] = ['!=', 'REG_paid', true];
+		}
+		$registrations = $transaction->registrations([$registration_query_where_params]);
+		if (! empty($registrations)) {
+			/** @type EE_Payment_Processor $payment_processor */
+			$payment_processor = EE_Registry::instance()->load_core('Payment_Processor');
+			$payment_processor->process_registration_payments($transaction, $payment, $registrations);
+		}
+	}
+
+
+	/**
+	 * _process_registration_status_change
+	 * This processes requested registration status changes for all the registrations
+	 * on a given transaction and (optionally) sends out notifications for the changes.
+	 *
+	 * @param EE_Transaction $transaction
+	 * @param array          $REG_IDs
+	 * @return bool
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _process_registration_status_change(EE_Transaction $transaction, $REG_IDs = [])
+	{
+		// first if there is no change in status then we get out.
+		$reg_status = $this->request->getRequestParam('txn_reg_status_change[reg_status]', 'NAN');
+		if ($reg_status === 'NAN') {
+			// no error message, no change requested, just nothing to do man.
+			return false;
+		}
+		/** @type EE_Transaction_Processor $transaction_processor */
+		$transaction_processor = EE_Registry::instance()->load_class('Transaction_Processor');
+
+		// made it here dude?  Oh WOW.  K, let's take care of changing the statuses
+		return $transaction_processor->manually_update_registration_statuses(
+			$transaction,
+			$reg_status,
+			[['REG_ID' => ['IN', $REG_IDs]]]
+		);
+	}
+
+
+	/**
+	 * _build_payment_json_response
+	 *
+	 * @access public
+	 * @param EE_Payment  $payment
+	 * @param array       $REG_IDs
+	 * @param bool | null $delete_txn_reg_status_change
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _build_payment_json_response(
+		EE_Payment $payment,
+		$REG_IDs = [],
+		$delete_txn_reg_status_change = null
+	) {
+		// was the payment deleted ?
+		if (is_bool($delete_txn_reg_status_change)) {
+			return [
+				'PAY_ID'                       => $payment->ID(),
+				'amount'                       => $payment->amount(),
+				'total_paid'                   => $payment->transaction()->paid(),
+				'txn_status'                   => $payment->transaction()->status_ID(),
+				'pay_status'                   => $payment->STS_ID(),
+				'registrations'                => $this->_registration_payment_data_array($REG_IDs),
+				'delete_txn_reg_status_change' => $delete_txn_reg_status_change,
+			];
+		}
+
+		$this->_get_payment_status_array();
+		return [
+			'amount'           => $payment->amount(),
+			'total_paid'       => $payment->transaction()->paid(),
+			'txn_status'       => $payment->transaction()->status_ID(),
+			'pay_status'       => $payment->STS_ID(),
+			'PAY_ID'           => $payment->ID(),
+			'STS_ID'           => $payment->STS_ID(),
+			'status'           => self::$_pay_status[ $payment->STS_ID() ],
+			'date'             => $payment->timestamp('Y-m-d', 'h:i a'),
+			'method'           => strtoupper($payment->source()),
+			'PM_ID'            => $payment->payment_method() ? $payment->payment_method()->ID() : 1,
+			'gateway'          => $payment->payment_method()
+				? $payment->payment_method()->admin_name()
+				: esc_html__('Unknown', 'event_espresso'),
+			'gateway_response' => $payment->gateway_response(),
+			'txn_id_chq_nmbr'  => $payment->txn_id_chq_nmbr(),
+			'po_number'        => $payment->po_number(),
+			'extra_accntng'    => $payment->extra_accntng(),
+			'registrations'    => $this->_registration_payment_data_array($REG_IDs),
+		];
+	}
+
+
+	/**
+	 * delete_payment
+	 *    delete a payment or refund made towards a transaction
+	 *
+	 * @access public
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws ReflectionException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function delete_payment()
+	{
+		$json_response_data = ['return_data' => false];
+		$PAY_ID = $this->request->getRequestParam('delete_txn_admin_payment[PAY_ID]', 0, 'int');
+
+		$can_delete         = EE_Registry::instance()->CAP->current_user_can(
+			'ee_delete_payments',
+			'delete_payment_from_registration_details'
+		);
+		if ($PAY_ID && $can_delete) {
+			$delete_txn_reg_status_change = $this->request->getRequestParam(
+				'delete_txn_reg_status_change',
+				false,
+				'bool'
+			);
+			$payment = EEM_Payment::instance()->get_one_by_ID($PAY_ID);
+			if ($payment instanceof EE_Payment) {
+				$REG_IDs = $this->_get_existing_reg_payment_REG_IDs($payment);
+				/** @type EE_Transaction_Payments $transaction_payments */
+				$transaction_payments = EE_Registry::instance()->load_class('Transaction_Payments');
+				if ($transaction_payments->delete_payment_and_update_transaction($payment)) {
+					$json_response_data['return_data'] = $this->_build_payment_json_response(
+						$payment,
+						$REG_IDs,
+						$delete_txn_reg_status_change
+					);
+					if ($delete_txn_reg_status_change) {
+						// MAKE sure we also add the delete_txn_req_status_change to the
+						// request data because that's how messages will be looking for it.
+						$this->request->setRequestParam('txn_reg_status_change', $delete_txn_reg_status_change);
+						$this->_maybe_send_notifications();
+						$this->_process_registration_status_change($payment->transaction(), $REG_IDs);
+					}
+				}
+			} else {
+				EE_Error::add_error(
+					esc_html__('Valid Payment data could not be retrieved from the database.', 'event_espresso'),
+					__FILE__,
+					__FUNCTION__,
+					__LINE__
+				);
+			}
+		} elseif ($can_delete) {
+			EE_Error::add_error(
+				esc_html__(
+					'A valid Payment ID was not received, therefore payment form data could not be loaded.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		} else {
+			EE_Error::add_error(
+				esc_html__(
+					'You do not have access to delete a payment.',
+					'event_espresso'
+				),
+				__FILE__,
+				__FUNCTION__,
+				__LINE__
+			);
+		}
+		$notices              = EE_Error::get_notices(false, false, false);
+		$this->_template_args = [
+			'data'      => $json_response_data,
+			'success'   => $notices['success'],
+			'error'     => $notices['errors'],
+			'attention' => $notices['attention'],
+		];
+		$this->_return_json();
+	}
+
+
+	/**
+	 * _registration_payment_data_array
+	 * adds info for 'owing' and 'paid' for each registration to the json response
+	 *
+	 * @access protected
+	 * @param array $REG_IDs
+	 * @return array
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 */
+	protected function _registration_payment_data_array($REG_IDs)
+	{
+		$registration_payment_data = [];
+		// if non empty reg_ids lets get an array of registrations and update the values for the apply_payment/refund rows.
+		if (! empty($REG_IDs)) {
+			$registrations = EEM_Registration::instance()->get_all([['REG_ID' => ['IN', $REG_IDs]]]);
+			foreach ($registrations as $registration) {
+				if ($registration instanceof EE_Registration) {
+					$registration_payment_data[ $registration->ID() ] = [
+						'paid'  => $registration->pretty_paid(),
+						'owing' => EEH_Template::format_currency($registration->final_price() - $registration->paid()),
+					];
+				}
+			}
+		}
+
+		return $registration_payment_data;
+	}
+
+
+	/**
+	 * _maybe_send_notifications
+	 * determines whether or not the admin has indicated that notifications should be sent.
+	 * If so, will toggle a filter switch for delivering registration notices.
+	 * If passed an EE_Payment object, then it will trigger payment notifications instead.
+	 *
+	 * @access protected
+	 * @param EE_Payment | null $payment
+	 */
+	protected function _maybe_send_notifications($payment = null)
+	{
+		switch ($payment instanceof EE_Payment) {
+			// payment notifications
+			case true:
+				if ($this->request->getRequestParam('txn_payments[send_notifications]', false, 'bool')) {
+					$this->_process_payment_notification($payment);
+				}
+				break;
+			// registration notifications
+			case false:
+				if ($this->request->getRequestParam('txn_reg_status_change[send_notifications]', false, 'bool')) {
+					add_filter('FHEE__EED_Messages___maybe_registration__deliver_notifications', '__return_true');
+				}
+				break;
+		}
+	}
+
+
+	/**
+	 * _send_payment_reminder
+	 *    generates HTML for the View Transaction Details Admin page
+	 *
+	 * @access protected
+	 * @return void
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	protected function _send_payment_reminder()
+	{
+		$TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
+		$transaction = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
+		$redirect_to = $this->request->getRequestParam('redirect_to');
+		$query_args  = $redirect_to ? ['action' => $redirect_to, 'TXN_ID' => $TXN_ID,] : [];
+		do_action(
+			'AHEE__Transactions_Admin_Page___send_payment_reminder__process_admin_payment_reminder',
+			$transaction
+		);
+		$this->_redirect_after_action(
+			false,
+			esc_html__('payment reminder', 'event_espresso'),
+			esc_html__('sent', 'event_espresso'),
+			$query_args,
+			true
+		);
+	}
+
+
+	/**
+	 *  get_transactions
+	 *    get transactions for given parameters (used by list table)
+	 *
+	 * @param int     $per_page how many transactions displayed per page
+	 * @param boolean $count   return the count or objects
+	 * @param string  $view
+	 * @return EE_Transaction[]|int int = count || array of transaction objects
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 */
+	public function get_transactions($per_page, $count = false, $view = '')
+	{
+		$start_date = wp_strip_all_tags(
+			$this->request->getRequestParam('txn-filter-start-date', date('m/d/Y', strtotime('-10 year')))
+		);
+		$end_date = wp_strip_all_tags(
+			$this->request->getRequestParam('txn-filter-end-date', date('m/d/Y'))
+		);
+
+		// make sure our timestamps start and end right at the boundaries for each day
+		$start_date = date('Y-m-d', strtotime($start_date)) . ' 00:00:00';
+		$end_date   = date('Y-m-d', strtotime($end_date)) . ' 23:59:59';
+
+
+		// convert to timestamps
+		$start_date = strtotime($start_date);
+		$end_date   = strtotime($end_date);
+
+		// makes sure start date is the lowest value and vice versa
+		$start_date = min($start_date, $end_date);
+		$end_date   = max($start_date, $end_date);
+
+		// convert to correct format for query
+		$start_date = EEM_Transaction::instance()->convert_datetime_for_query(
+			'TXN_timestamp',
+			date('Y-m-d H:i:s', $start_date),
+			'Y-m-d H:i:s'
+		);
+		$end_date   = EEM_Transaction::instance()->convert_datetime_for_query(
+			'TXN_timestamp',
+			date('Y-m-d H:i:s', $end_date),
+			'Y-m-d H:i:s'
+		);
+
+
+		// set orderby
+		$orderby = $this->request->getRequestParam('orderby');
+
+		switch ($orderby) {
+			case 'TXN_ID':
+				break;
+			case 'ATT_fname':
+				$orderby = 'Registration.Attendee.ATT_fname';
+				break;
+			case 'event_name':
+				$orderby = 'Registration.Event.EVT_name';
+				break;
+			default: // 'TXN_timestamp'
+				$orderby = 'TXN_timestamp';
+		}
+
+		$sort         = $this->request->getRequestParam('order', 'DESC');
+		$current_page = $this->request->getRequestParam('paged', 1, 'int');
+
+		$per_page = absint($per_page) ? $per_page : 10;
+		$per_page = $this->request->getRequestParam('perpage', $per_page, 'int');
+
+		$offset = ($current_page - 1) * $per_page;
+		$limit  = [$offset, $per_page];
+
+		$_where = [
+			'TXN_timestamp'          => ['BETWEEN', [$start_date, $end_date]],
+			'Registration.REG_count' => 1,
+		];
+
+		$EVT_ID = $this->request->getRequestParam('EVT_ID', 0, 'int');
+		if ($EVT_ID) {
+			$_where['Registration.EVT_ID'] = $EVT_ID;
+		}
+
+		$search_term = $this->request->getRequestParam('s');
+		if ($search_term) {
+			$search_term = '%' . $search_term . '%';
+			$_where['OR']  = [
+				'Registration.Event.EVT_name'         => ['LIKE', $search_term],
+				'Registration.Event.EVT_desc'         => ['LIKE', $search_term],
+				'Registration.Event.EVT_short_desc'   => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_full_name' => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_fname'     => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_lname'     => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_short_bio' => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_email'     => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_address'   => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_address2'  => ['LIKE', $search_term],
+				'Registration.Attendee.ATT_city'      => ['LIKE', $search_term],
+				'Registration.REG_final_price'        => ['LIKE', $search_term],
+				'Registration.REG_code'               => ['LIKE', $search_term],
+				'Registration.REG_count'              => ['LIKE', $search_term],
+				'Registration.REG_group_size'         => ['LIKE', $search_term],
+				'Registration.Ticket.TKT_name'        => ['LIKE', $search_term],
+				'Registration.Ticket.TKT_description' => ['LIKE', $search_term],
+				'Payment.PAY_source'                  => ['LIKE', $search_term],
+				'Payment.Payment_Method.PMD_name'     => ['LIKE', $search_term],
+				'TXN_session_data'                    => ['LIKE', $search_term],
+				'Payment.PAY_txn_id_chq_nmbr'         => ['LIKE', $search_term],
+			];
+		}
+
+		$status = $this->request->getRequestParam('status');
+		// failed transactions
+		$failed     = (! empty($status) && $status === 'failed' && ! $count) || ($count && $view === 'failed');
+		$abandoned  = (! empty($status) && $status === 'abandoned' && ! $count) || ($count && $view === 'abandoned');
+		$incomplete = (! empty($status) && $status === 'incomplete' && ! $count) || ($count && $view === 'incomplete');
+
+		if ($failed) {
+			$_where['STS_ID'] = EEM_Transaction::failed_status_code;
+		} elseif ($abandoned) {
+			$_where['STS_ID'] = EEM_Transaction::abandoned_status_code;
+		} elseif ($incomplete) {
+			$_where['STS_ID'] = EEM_Transaction::incomplete_status_code;
+		} else {
+			$_where['STS_ID']  = ['!=', EEM_Transaction::failed_status_code];
+			$_where['STS_ID*'] = ['!=', EEM_Transaction::abandoned_status_code];
+		}
+
+		$query_params = apply_filters(
+			'FHEE__Transactions_Admin_Page___get_transactions_query_params',
+			[
+				$_where,
+				'order_by'                 => [$orderby => $sort],
+				'limit'                    => $limit,
+				'default_where_conditions' => EEM_Base::default_where_conditions_this_only,
+			],
+			$this->request->requestParams(),
+			$view,
+			$count
+		);
+
+		return $count
+			? EEM_Transaction::instance()->count([$query_params[0]], 'TXN_ID', true)
+			: EEM_Transaction::instance()->get_all($query_params);
+	}
+
+
+	/**
+	 * @throws EE_Error
+	 * @throws InvalidArgumentException
+	 * @throws InvalidDataTypeException
+	 * @throws InvalidInterfaceException
+	 * @throws ReflectionException
+	 * @throws RuntimeException
+	 * @since 4.9.79.p
+	 */
+	public function recalculateLineItems()
+	{
+		$TXN_ID = $this->request->getRequestParam('TXN_ID', 0, 'int');
+		/** @var EE_Transaction $transaction */
+		$transaction     = EEM_Transaction::instance()->get_one_by_ID($TXN_ID);
+		$success         = $transaction->recalculateLineItems();
+		$redirect_to = $this->request->getRequestParam('redirect_to');
+		$query_args = $redirect_to ? ['action' => $redirect_to, 'TXN_ID' => $TXN_ID,] : [];
+		$this->_redirect_after_action(
+			$success,
+			esc_html__('Transaction taxes and totals', 'event_espresso'),
+			esc_html__('recalculated', 'event_espresso'),
+			$query_args,
+			true
+		);
+	}
 }

admin_pages/transactions/help_tabs/transactions_view_transaction.help_tab.php

Indentation +6 added lines, -6 removed lines

@@ -8,15 +8,15 @@
     <strong><?php esc_html_e('Recommendations', 'event_espresso'); ?></strong>
     <br />
     <?php esc_html_e(
-        'To learn more about the options on this page, take a look at the different tabs that appear on the left side of the page.',
-        'event_espresso'
-    ); ?>
+		'To learn more about the options on this page, take a look at the different tabs that appear on the left side of the page.',
+		'event_espresso'
+	); ?>
 </p>
 <p>
     <strong><?php esc_html_e('Screen Options', 'event_espresso'); ?></strong>
     <br />
     <?php esc_html_e(
-        'You can customize the information that is shown on this page by toggling the Screen Options tab. Then you can add or remove checkmarks to hide or show certain content.',
-        'event_espresso'
-    ); ?>
+		'You can customize the information that is shown on this page by toggling the Screen Options tab. Then you can add or remove checkmarks to hide or show certain content.',
+		'event_espresso'
+	); ?>
 </p>
\ No newline at end of file

admin_pages/transactions/help_tabs/transactions_overview.help_tab.php

Indentation +6 added lines, -6 removed lines

@@ -8,15 +8,15 @@
     <strong><?php esc_html_e('Recommendations', 'event_espresso'); ?></strong>
     <br />
     <?php esc_html_e(
-        'To learn more about the options on this page, take a look at the different tabs that appear on the left side of the page.',
-        'event_espresso'
-    ); ?>
+		'To learn more about the options on this page, take a look at the different tabs that appear on the left side of the page.',
+		'event_espresso'
+	); ?>
 </p>
 <p>
     <strong><?php esc_html_e('Screen Options', 'event_espresso'); ?></strong>
     <br />
     <?php esc_html_e(
-        'You can customize the information that is shown on this page by toggling the Screen Options tab. Then you can add or remove checkmarks to hide or show certain content and even adjust the pagination for transactions.',
-        'event_espresso'
-    ); ?>
+		'You can customize the information that is shown on this page by toggling the Screen Options tab. Then you can add or remove checkmarks to hide or show certain content and even adjust the pagination for transactions.',
+		'event_espresso'
+	); ?>
 </p>
\ No newline at end of file

espresso.php

Indentation +80 added lines, -80 removed lines

@@ -38,103 +38,103 @@
  * @since           4.0
  */
 if (function_exists('espresso_version')) {
-    if (! function_exists('espresso_duplicate_plugin_error')) {
-        /**
-         *    espresso_duplicate_plugin_error
-         *    displays if more than one version of EE is activated at the same time
-         */
-        function espresso_duplicate_plugin_error()
-        {
-            ?>
+	if (! function_exists('espresso_duplicate_plugin_error')) {
+		/**
+		 *    espresso_duplicate_plugin_error
+		 *    displays if more than one version of EE is activated at the same time
+		 */
+		function espresso_duplicate_plugin_error()
+		{
+			?>
             <div class="error">
                 <p>
                     <?php
-                    echo esc_html__(
-                        'Can not run multiple versions of Event Espresso! One version has been automatically deactivated. Please verify that you have the correct version you want still active.',
-                        'event_espresso'
-                    ); ?>
+					echo esc_html__(
+						'Can not run multiple versions of Event Espresso! One version has been automatically deactivated. Please verify that you have the correct version you want still active.',
+						'event_espresso'
+					); ?>
                 </p>
             </div>
             <?php
-            espresso_deactivate_plugin(plugin_basename(__FILE__));
-        }
-    }
-    add_action('admin_notices', 'espresso_duplicate_plugin_error', 1);
+			espresso_deactivate_plugin(plugin_basename(__FILE__));
+		}
+	}
+	add_action('admin_notices', 'espresso_duplicate_plugin_error', 1);
 } else {
-    define('EE_MIN_PHP_VER_REQUIRED', '5.6.2');
-    if (! version_compare(PHP_VERSION, EE_MIN_PHP_VER_REQUIRED, '>=')) {
-        /**
-         * espresso_minimum_php_version_error
-         *
-         * @return void
-         */
-        function espresso_minimum_php_version_error()
-        {
-            ?>
+	define('EE_MIN_PHP_VER_REQUIRED', '5.6.2');
+	if (! version_compare(PHP_VERSION, EE_MIN_PHP_VER_REQUIRED, '>=')) {
+		/**
+		 * espresso_minimum_php_version_error
+		 *
+		 * @return void
+		 */
+		function espresso_minimum_php_version_error()
+		{
+			?>
             <div class="error">
                 <p>
                     <?php
-                    printf(
-                        esc_html__(
-                            'We\'re sorry, but Event Espresso requires PHP version %1$s or greater in order to operate. You are currently running version %2$s.%3$sIn order to update your version of PHP, you will need to contact your current hosting provider.%3$sFor information on stable PHP versions, please go to %4$s.',
-                            'event_espresso'
-                        ),
-                        EE_MIN_PHP_VER_REQUIRED,
-                        PHP_VERSION,
-                        '<br/>',
-                        '<a href="http://php.net/downloads.php">http://php.net/downloads.php</a>'
-                    );
-                    ?>
+					printf(
+						esc_html__(
+							'We\'re sorry, but Event Espresso requires PHP version %1$s or greater in order to operate. You are currently running version %2$s.%3$sIn order to update your version of PHP, you will need to contact your current hosting provider.%3$sFor information on stable PHP versions, please go to %4$s.',
+							'event_espresso'
+						),
+						EE_MIN_PHP_VER_REQUIRED,
+						PHP_VERSION,
+						'<br/>',
+						'<a href="http://php.net/downloads.php">http://php.net/downloads.php</a>'
+					);
+					?>
                 </p>
             </div>
             <?php
-            espresso_deactivate_plugin(plugin_basename(__FILE__));
-        }
+			espresso_deactivate_plugin(plugin_basename(__FILE__));
+		}
 
-        add_action('admin_notices', 'espresso_minimum_php_version_error', 1);
-    } else {
-        define('EVENT_ESPRESSO_MAIN_FILE', __FILE__);
-        /**
-         * espresso_version
-         * Returns the plugin version
-         *
-         * @return string
-         */
-        function espresso_version()
-        {
-            return apply_filters('FHEE__espresso__espresso_version', '4.10.29.rc.016');
-        }
+		add_action('admin_notices', 'espresso_minimum_php_version_error', 1);
+	} else {
+		define('EVENT_ESPRESSO_MAIN_FILE', __FILE__);
+		/**
+		 * espresso_version
+		 * Returns the plugin version
+		 *
+		 * @return string
+		 */
+		function espresso_version()
+		{
+			return apply_filters('FHEE__espresso__espresso_version', '4.10.29.rc.016');
+		}
 
-        /**
-         * espresso_plugin_activation
-         * adds a wp-option to indicate that EE has been activated via the WP admin plugins page
-         */
-        function espresso_plugin_activation()
-        {
-            update_option('ee_espresso_activation', true);
-        }
+		/**
+		 * espresso_plugin_activation
+		 * adds a wp-option to indicate that EE has been activated via the WP admin plugins page
+		 */
+		function espresso_plugin_activation()
+		{
+			update_option('ee_espresso_activation', true);
+		}
 
-        register_activation_hook(EVENT_ESPRESSO_MAIN_FILE, 'espresso_plugin_activation');
+		register_activation_hook(EVENT_ESPRESSO_MAIN_FILE, 'espresso_plugin_activation');
 
-        require_once __DIR__ . '/core/bootstrap_espresso.php';
-        bootstrap_espresso();
-    }
+		require_once __DIR__ . '/core/bootstrap_espresso.php';
+		bootstrap_espresso();
+	}
 }
 if (! function_exists('espresso_deactivate_plugin')) {
-    /**
-     *    deactivate_plugin
-     * usage:  espresso_deactivate_plugin( plugin_basename( __FILE__ ));
-     *
-     * @access public
-     * @param string $plugin_basename - the results of plugin_basename( __FILE__ ) for the plugin's main file
-     * @return    void
-     */
-    function espresso_deactivate_plugin($plugin_basename = '')
-    {
-        if (! function_exists('deactivate_plugins')) {
-            require_once ABSPATH . 'wp-admin/includes/plugin.php';
-        }
-        unset($_GET['activate'], $_REQUEST['activate']);
-        deactivate_plugins($plugin_basename);
-    }
+	/**
+	 *    deactivate_plugin
+	 * usage:  espresso_deactivate_plugin( plugin_basename( __FILE__ ));
+	 *
+	 * @access public
+	 * @param string $plugin_basename - the results of plugin_basename( __FILE__ ) for the plugin's main file
+	 * @return    void
+	 */
+	function espresso_deactivate_plugin($plugin_basename = '')
+	{
+		if (! function_exists('deactivate_plugins')) {
+			require_once ABSPATH . 'wp-admin/includes/plugin.php';
+		}
+		unset($_GET['activate'], $_REQUEST['activate']);
+		deactivate_plugins($plugin_basename);
+	}
 }