eventespresso / event-espresso-core

core/libraries/messages/EE_Message_Resource_Manager.lib.php

Indentation +1112 added lines, -1112 removed lines

@@ -1,7 +1,7 @@ 
 <?php
 
 if (! defined('EVENT_ESPRESSO_VERSION')) {
-    exit('No direct script access allowed');
+	exit('No direct script access allowed');
 }
 
 
@@ -17,1117 +17,1117 @@ 
 class EE_Message_Resource_Manager
 {
 
-    /**
-     * This option in the database is used to keep a record of message types that have been activated for a messenger
-     * at some point in the history of the site.  It is utilized by the implementation of the 'force' flag in
-     * EE_Register_Message_Type.  The force flag is an indication of whether a message type should be activated by
-     * default when the message type is registered.  However, if a user has explicitly deactivated a message type, then
-     * the force flag is ignored.  The method by which the code knows whether to ignore this flag is via this option.
-     * Note, that this is NOT a historical record.  Its entirely possible for a message type to have been activated for
-     * a messenger and yet not have a record in this option.  This occurs when a message type is inactivated through an
-     * automated process (when an add-on registering the message type deactivates, or when some other code calls the
-     * EE_Registery_Message_Type::deregister method) and the related record(s) is(are) removed from this option to ensure
-     * the "force" flag is respected if that message type is later re-registered.
-     *
-     * This option should NOT be used to determine the current "active" state of a message type for a given messenger.
-     *
-     * The name of this option (and related methods/properties) is due to matching the original intended purpose for the
-     * option that got superseded by later behaviour requirements.
-     */
-    const HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME = 'ee_has_activated_messenger';
-
-    /**
-     * @type boolean $_initialized
-     */
-    protected $_initialized = false;
-
-    /**
-     * @type EE_Messenger_Collection $_messenger_collection_loader
-     */
-    protected $_messenger_collection_loader;
-
-    /**
-     * @type EE_Message_Type_Collection $_message_type_collection_loader
-     */
-    protected $_message_type_collection_loader;
-
-    /**
-     * @type EEM_Message_Template_Group $_message_template_group_model
-     */
-    protected $_message_template_group_model;
-
-    /**
-     * @type EE_messenger[]
-     */
-    protected $_installed_messengers = array();
-
-    /**
-     * @type EE_message_type[]
-     */
-    protected $_installed_message_types = array();
-
-    /**
-     * Array of active messengers.
-     * Format is this:
-     * array(
-     *      'messenger_name' => EE_messenger
-     * )
-     *
-     * @type EE_messenger[]
-     */
-    protected $_active_messengers = array();
-
-    /**
-     * Formatted array of active message types grouped per messenger.
-     * Format is this:
-     * array(
-     *      'messenger_name' => array(
-     *          'settings' => array(
-     *              '{messenger_name}-message_types' => array(
-     *                  'message_type_name' => array() //variable array of settings corresponding to message type.
-     *              )
-     *          )
-     *      )
-     * )
-     *
-     * @type array
-     */
-    protected $_active_message_types = array();
-
-
-    /**
-     * This holds the array of messengers and their corresponding message types that have
-     * been activated on a site at some point.  This is an important record that helps the messages system
-     * not accidentally reactivate something that was intentionally deactivated by a user.
-     *
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @type array
-     */
-    protected $_has_activated_messengers_and_message_types = array();
-
-    /**
-     * An array of unique message type contexts across all active message types.
-     * The array will be indexed by either 'slugs' or 'all'.
-     * The slugs index contains an array indexed by unique context slugs with the latest label representation for that
-     * slug. array(
-     *      'context_slug' => 'localized label for context obtained from latest message type in the loop'.
-     * );
-     * The all index returns an array in this format:
-     * array(
-     *      'message_type_name' => array(
-     *          'context_slug' => array(
-     *              'label' => 'localized label for context',
-     *              'description' => 'localized description for context'
-     *          )
-     *      )
-     * );
-     *
-     * @type array
-     */
-    protected $_contexts = array();
-
-
-    /**
-     * EE_Message_Resource_Manager constructor.
-     *
-     * @param \EE_Messenger_Collection_Loader    $Messenger_Collection_Loader
-     * @param \EE_Message_Type_Collection_Loader $Message_Type_Collection_Loader
-     * @param \EEM_Message_Template_Group        $Message_Template_Group_Model
-     */
-    function __construct(
-        EE_Messenger_Collection_Loader $Messenger_Collection_Loader,
-        EE_Message_Type_Collection_Loader $Message_Type_Collection_Loader,
-        EEM_Message_Template_Group $Message_Template_Group_Model
-    ) {
-        $this->_messenger_collection_loader    = $Messenger_Collection_Loader;
-        $this->_message_type_collection_loader = $Message_Type_Collection_Loader;
-        $this->_message_template_group_model   = $Message_Template_Group_Model;
-    }
-
-
-    /**
-     * @return void
-     */
-    protected function _initialize_collections()
-    {
-        if ($this->_initialized) {
-            return;
-        }
-        $this->_initialized = true;
-        $this->_messenger_collection_loader->load_messengers_from_folder();
-        $this->_message_type_collection_loader->load_message_types_from_folder();
-        $this->get_has_activated_messengers_option(true);
-        $this->_set_active_messengers_and_message_types();
-    }
-
-
-    /**
-     * @return EE_Messenger_Collection
-     */
-    public function messenger_collection()
-    {
-        $this->_initialize_collections();
-        return $this->_messenger_collection_loader->messenger_collection();
-    }
-
-
-    /**
-     * @return EE_messenger[]
-     */
-    public function active_messengers()
-    {
-        $this->_initialize_collections();
-        return $this->_active_messengers;
-    }
-
-
-    /**
-     * @param string $messenger_name
-     * @return \EE_messenger
-     */
-    public function get_messenger($messenger_name)
-    {
-        return $this->messenger_collection()->get_by_info($messenger_name);
-    }
-
-
-    /**
-     * This returns the corresponding EE_messenger object for the given string if it is active.
-     *
-     * @param string $messenger
-     * @return EE_messenger | null
-     */
-    public function get_active_messenger($messenger)
-    {
-        $this->_initialize_collections();
-        return ! empty($this->_active_messengers[$messenger]) ? $this->_active_messengers[$messenger] : null;
-    }
-
-
-    /**
-     * @return \EE_messenger[]
-     */
-    public function installed_messengers()
-    {
-        if (empty($this->_installed_messengers)) {
-            $this->_installed_messengers = array();
-            $this->messenger_collection()->rewind();
-            while ($this->messenger_collection()->valid()) {
-                $this->_installed_messengers[$this->messenger_collection()->current()->name] = $this->messenger_collection()->current();
-                $this->messenger_collection()->next();
-            }
-        }
-        return $this->_installed_messengers;
-    }
-
-
-    /**
-     * @param string $messenger_name
-     * @return \EE_messenger
-     * @throws \EE_Error
-     */
-    public function valid_messenger($messenger_name)
-    {
-        $messenger = $this->get_messenger($messenger_name);
-        if ($messenger instanceof EE_messenger) {
-            return $messenger;
-        }
-        throw new EE_Error(
-            sprintf(
-                __('The "%1$s" messenger is either invalid or not installed', 'event_espresso'),
-                $messenger_name
-            )
-        );
-    }
-
-
-    /**
-     * @return EE_Message_Type_Collection
-     */
-    public function message_type_collection()
-    {
-        $this->_initialize_collections();
-        return $this->_message_type_collection_loader->message_type_collection();
-    }
-
-
-    /**
-     * @return array
-     */
-    public function active_message_types()
-    {
-        $this->_initialize_collections();
-        return $this->_active_message_types;
-    }
-
-
-    /**
-     * @param string $message_type_name
-     * @return \EE_message_type
-     */
-    public function get_message_type($message_type_name)
-    {
-        return $this->message_type_collection()->get_by_info($message_type_name);
-    }
-
-
-    /**
-     * This returns the EE_message_type from the active message types array ( if present );
-     *
-     * @param string $messenger_name
-     * @param string $message_type_name
-     * @return \EE_message_type|null
-     */
-    public function get_active_message_type_for_messenger($messenger_name, $message_type_name)
-    {
-        return $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)
-            ? $this->get_message_type($message_type_name)
-            : null;
-    }
-
-
-    /**
-     * Returns whether the given message type is active for the given messenger.
-     *
-     * @param string $messenger_name
-     * @param string $message_type_name
-     * @return bool
-     */
-    public function is_message_type_active_for_messenger($messenger_name, $message_type_name)
-    {
-        $this->_initialize_collections();
-        return ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]);
-    }
-
-
-    /**
-     * Returns whether the given messenger is active.
-     *
-     * @param string $messenger_name the name of the messenger to check if active.
-     * @return bool
-     */
-    public function is_messenger_active($messenger_name)
-    {
-        $this->_initialize_collections();
-        return ! empty($this->_active_message_types[$messenger_name]);
-    }
-
-
-    /**
-     * This returns any settings that might be on a message type for a messenger
-     *
-     * @param string $messenger_name    The slug of the messenger
-     * @param string $message_type_name The slug of the message type getting the settings for.
-     * @return array
-     */
-    public function get_message_type_settings_for_messenger($messenger_name, $message_type_name)
-    {
-        $settings = array();
-        if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
-            $settings = isset($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings'])
-                ? $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings']
-                : array();
-        }
-        return $settings;
-    }
-
-
-    /**
-     * Returns whether the given messenger name has active message types on it.
-     * Infers whether the messenger is active or not as well.
-     *
-     * @param string $messenger_name
-     * @return bool
-     */
-    public function messenger_has_active_message_types($messenger_name)
-    {
-        $this->_initialize_collections();
-        return
-            ! empty($this->_active_message_types[$messenger_name])
-            && ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types']);
-    }
-
-
-    /**
-     * This checks the _active_message_types property for any active message types
-     * that are present for the given messenger and returns them.
-     *
-     * @since 4.9.0
-     * @param string $messenger_name The messenger being checked
-     * @return EE_message_type[]|array    (empty array if no active_message_types)
-     */
-    public function get_active_message_types_for_messenger($messenger_name)
-    {
-        $message_types = array();
-        if (! $this->messenger_has_active_message_types($messenger_name)) {
-            return $message_types;
-        }
-        $installed_message_types = $this->installed_message_types();
-        foreach ($installed_message_types as $message_type_name => $message_type) {
-            if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
-                $message_types[$message_type_name] = $message_type;
-            }
-        }
-        return $message_types;
-    }
-
-
-    /**
-     * This does NOT return the _active_message_types property but
-     * simply returns an array of active message type names from that property.
-     * (The _active_message_types property is indexed by messenger and active message_types per messenger).
-     *
-     * @return array message_type references (string)
-     */
-    public function list_of_active_message_types()
-    {
-        $active_message_type_names = array();
-        $this->_initialize_collections();
-        foreach ($this->_active_message_types as $messenger => $messenger_settings) {
-            if (! isset($messenger_settings['settings'][$messenger . '-message_types'])) {
-                continue;
-            }
-            foreach ($messenger_settings['settings'][$messenger . '-message_types'] as $message_type_name => $message_type_config) {
-                if (! in_array($message_type_name, $active_message_type_names)) {
-                    $active_message_type_names[] = $message_type_name;
-                }
-            }
-        }
-        return $active_message_type_names;
-    }
-
-
-    /**
-     * Same as list_of_active_message_types() except this returns actual EE_message_type objects
-     *
-     * @since 4.9.0
-     * @return \EE_message_type[]
-     */
-    public function get_active_message_type_objects()
-    {
-        $active_message_types      = array();
-        $installed_message_types   = $this->installed_message_types();
-        $active_message_type_names = $this->list_of_active_message_types();
-        foreach ($active_message_type_names as $active_message_type_name) {
-            if (isset($installed_message_types[$active_message_type_name])) {
-                $active_message_types[$active_message_type_name] = $installed_message_types[$active_message_type_name];
-            }
-        }
-        return $active_message_types;
-    }
-
-
-    /**
-     * @return \EE_message_type[]
-     */
-    public function installed_message_types()
-    {
-        if (empty($this->_installed_message_types)) {
-            $this->message_type_collection()->rewind();
-            while ($this->message_type_collection()->valid()) {
-                $this->_installed_message_types[$this->message_type_collection()->current()->name] = $this->message_type_collection()->current();
-                $this->message_type_collection()->next();
-            }
-        }
-        return $this->_installed_message_types;
-    }
-
-
-    /**
-     * @param string $message_type_name
-     * @return \EE_message_type
-     * @throws \EE_Error
-     */
-    public function valid_message_type($message_type_name)
-    {
-        $message_type = $this->get_message_type($message_type_name);
-        if ($message_type instanceof EE_message_type) {
-            return $message_type;
-        }
-        throw new EE_Error(
-            sprintf(
-                __('The "%1$s" message type is either invalid or not installed', 'event_espresso'),
-                $message_type_name
-            )
-        );
-    }
-
-
-    /**
-     * valid_message_type_for_messenger
-     *
-     * @param EE_messenger $messenger
-     * @param string       $message_type_name
-     * @return boolean
-     * @throws \EE_Error
-     */
-    public function valid_message_type_for_messenger(EE_messenger $messenger, $message_type_name)
-    {
-        $valid_message_types = $messenger->get_valid_message_types();
-        if (! in_array($message_type_name, $valid_message_types)) {
-            throw new EE_Error(
-                sprintf(
-                    __(
-                        'The message type (%1$s) sent to "%2$s" is not valid for the "%3$s" messenger.  Double-check the spelling and verify that message type has been registered as a valid type with the messenger.',
-                        'event_espresso'
-                    ),
-                    $message_type_name,
-                    __METHOD__,
-                    $messenger->name
-                )
-            );
-        }
-        return true;
-    }
-
-
-    /**
-     * Used to return active messengers array stored in the wp options table.
-     * If no value is present in the option then an empty array is returned.
-     *
-     * @param   bool $reset     If true then we ignore whether the option is cached on the _active_message_types
-     *                          property and pull directly from the db.  Otherwise whatever is currently on the
-     *                          $_active_message_types property is pulled.
-     * @return array
-     */
-    public function get_active_messengers_option($reset = false)
-    {
-        if ($reset) {
-            $this->_active_message_types = get_option('ee_active_messengers', array());
-        }
-        return $this->_active_message_types;
-    }
-
-
-    /**
-     * Used to update the active messengers array stored in the wp options table.
-     *
-     * @param array $active_messenger_settings Incoming data to save.  If empty, then the internal cached property
-     *                                         representing this data is used.
-     * @return bool FALSE if not updated, TRUE if updated.
-     */
-    public function update_active_messengers_option($active_messenger_settings = array())
-    {
-        $active_messenger_settings = empty($active_messenger_settings) ? $this->_active_message_types : $active_messenger_settings;
-        //make sure _active_message_types is updated (this is the internal cache for the settings).
-        $this->_active_message_types = $active_messenger_settings;
-        return update_option('ee_active_messengers', $active_messenger_settings);
-    }
-
-
-    /**
-     * Used to return has activated message types for messengers array stored in the wp options table.
-     * If no value is present in the option then an empty array is returned.
-     * The value is cached on the $_has_activated_messengers_and_message_types property for future calls.
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @param   bool $reset Used to indicate that any cached value should be ignored.
-     * @return array
-     */
-    public function get_has_activated_messengers_option($reset = false)
-    {
-        if ($reset || empty($this->_has_activated_messengers_and_message_types)) {
-            $this->_has_activated_messengers_and_message_types = get_option(self::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME, array());
-        }
-        return $this->_has_activated_messengers_and_message_types;
-    }
-
-
-    /**
-     * Used to update the has activated option in the db.
-     *
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @param array $has_activated_messengers Incoming data to save.  If empty, then the internal cached property
-     *                                        representing this data is used.
-     * @return bool FALSE if not updated, TRUE if updated.
-     */
-    public function update_has_activated_messengers_option($has_activated_messengers = array())
-    {
-        //make sure the option has been retrieved from first so we don't overwrite it accidentally.
-        if (empty($has_activated_messengers) && empty($this->_has_activated_messengers_and_message_types)) {
-            $this->get_has_activated_messengers_option();
-        }
-        $has_activated_messengers = empty($has_activated_messengers)
-            ? $this->_has_activated_messengers_and_message_types
-            : $has_activated_messengers;
-        return update_option(self::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME, $has_activated_messengers);
-    }
-
-
-    /**
-     * wrapper for _set_active_messengers_and_message_types()
-     */
-    public function reset_active_messengers_and_message_types()
-    {
-        $this->_set_active_messengers_and_message_types();
-    }
-
-
-    /**
-     * Generate list of active messengers and message types from collection.
-     * This sets up the active messengers from what is present in the database.
-     */
-    protected function _set_active_messengers_and_message_types()
-    {
-        //echo "\n\n " . __LINE__ . ") " . __METHOD__ . "() \n";
-        // list of activated messengers as set via the admin
-        // note calling `get_active_messengers_options` also initializes the _active_message_types property.
-        $this->get_active_messengers_option(true);
-        $this->ensure_messengers_are_active(array(), false, true);
-        $this->update_active_messengers_option();
-        $this->update_has_activated_messengers_option();
-    }
-
-
-    /**
-     * Ensures that the specified messenger is currently active.
-     * If not, activates it and its default message types.
-     *
-     * @param string $messenger_name
-     * @param bool   $update_option Whether to update the option in the db or not.
-     * @return boolean true if either already active or successfully activated.
-     */
-    public function ensure_messenger_is_active($messenger_name, $update_option = true)
-    {
-        if (! isset($this->_active_messengers[$messenger_name])) {
-            try {
-                $this->activate_messenger($messenger_name, array(), $update_option);
-            } catch (EE_Error $e) {
-                EE_Error::add_error(
-                    $e->getMessage(),
-                    __FILE__,
-                    __FUNCTION__,
-                    __LINE__
-                );
-                return false;
-            }
-        }
-        return true;
-    }
-
-
-    /**
-     * This ensures the given array of messenger names is active in the system.
-     * Note, this method will not activate any NEW message types for the messenger when it is called. Instead,
-     * it will automatically activate the default message types for the messenger if its not active.
-     *
-     * @param array $messenger_names  Array of messenger names for messengers to be activated.  If an empty array
-     *                                (default) then will attempt to set the active messengers from the
-     *                                activated_messengers option
-     *                                (stored in $_active_message_types property).
-     * @param bool  $update_option    Whether to update the related active messengers option.
-     * @param bool  $verify           Whether to verify the messengers are installed before activating. Note if this is
-     *                                set to true and a messenger is indicated as active, but is NOT installed, then it
-     *                                will automatically be deactivated.
-     */
-    public function ensure_messengers_are_active($messenger_names = array(), $update_option = true, $verify = false)
-    {
-        $messenger_names = empty($messenger_names) ? array_keys($this->_active_message_types) : $messenger_names;
-
-        $not_installed = array();
-        foreach ($messenger_names as $messenger_name) {
-            if ($verify && ! $this->messenger_collection()->has_by_name($messenger_name)) {
-                $not_installed[] = $messenger_name;
-                $this->deactivate_messenger($messenger_name);
-                continue;
-            }
-            $this->ensure_messenger_is_active($messenger_name, $update_option);
-        }
-
-        if (! empty($not_installed)) {
-            EE_Error::add_error(
-                sprintf(
-                    __('The following messengers are either not installed or are invalid:%1$s %2$s', 'event_espresso'),
-                    '<br />',
-                    implode(', ', $not_installed)
-                ),
-                __FILE__, __FUNCTION__, __LINE__
-            );
-        }
-    }
-
-
-    /**
-     * Ensures that the specified message type for the given messenger is currently active, if not activates it.
-     * This ALSO ensures that the given messenger is active as well!
-     *
-     * @param string $message_type_name message type name.
-     * @param        $messenger_name
-     * @param bool   $update_option     Whether to update the option in the db or not.
-     * @return bool  Returns true if already is active or if was activated successfully.
-     * @throws \EE_Error
-     */
-    public function ensure_message_type_is_active($message_type_name, $messenger_name, $update_option = true)
-    {
-        // grab the messenger to work with.
-        $messenger = $this->valid_messenger($messenger_name);
-        if ($this->valid_message_type_for_messenger($messenger, $message_type_name)) {
-            //ensure messenger is active (that's an inherent coupling between active message types and the
-            //messenger they are being activated for.
-            try {
-                if (! $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
-                    //all is good so let's just get it active
-                    $this->activate_messenger($messenger_name, array($message_type_name), $update_option);
-                }
-            } catch (EE_Error $e) {
-                EE_Error::add_error(
-                    $e->getMessage(),
-                    __FILE__,
-                    __FUNCTION__,
-                    __LINE__
-                );
-                return false;
-            }
-        }
-        return true;
-    }
-
-
-    /**
-     * This is a wrapper for `ensure_message_type_is_active` that will handle ensuring multiple message types for a
-     * messenger are active in one go.
-     *
-     * @param array  $message_type_names Array of message type names to ensure are active.
-     * @param string $messenger_name     The name of the messenger that the message types are to be activated on.
-     * @param bool   $update_option      Whether to persist the activation to the database or not (default true).
-     */
-    public function ensure_message_types_are_active($message_type_names, $messenger_name, $update_option = true)
-    {
-        $message_type_names = (array)$message_type_names;
-        foreach ($message_type_names as $message_type_name) {
-            // note, intentionally not updating option here because we're in a loop.
-            // We'll follow the instructions of the incoming $update_option argument after the loop.
-            $this->ensure_message_type_is_active($message_type_name, $messenger_name, false);
-        }
-        if ($update_option) {
-            $this->update_active_messengers_option();
-            $this->update_has_activated_messengers_option();
-        }
-    }
-
-
-    /**
-     * Activates the specified messenger.
-     *
-     * @param string $messenger_name
-     * @param array  $message_type_names        An array of message type names to activate with this messenger.
-     *                                          If included we do NOT setup the default message types
-     *                                          (assuming they are already setup.)
-     * @param bool   $update_active_messengers_option
-     * @return array of generated templates
-     * @throws \EE_Error
-     */
-    public function activate_messenger(
-        $messenger_name,
-        $message_type_names = array(),
-        $update_active_messengers_option = true
-    ) {
-        $templates = array();
-        // grab the messenger to work with.
-        $messenger = $this->messenger_collection()->get_by_info($messenger_name);
-        // it's inactive. Activate it.
-        if ($messenger instanceof EE_messenger) {
-            $this->_active_messengers[$messenger->name] = $messenger;
-            //activate incoming message types set to be activated with messenger.
-            $message_type_names = $this->_activate_message_types($messenger, $message_type_names);
-            // setup any initial settings for the messenger if necessary.
-            $this->add_settings_for_messenger($messenger->name);
-            if ($update_active_messengers_option) {
-                $this->update_active_messengers_option();
-                $this->update_has_activated_messengers_option();
-            }
-            //generate new templates if necessary and ensure all related templates that are already in the database are
-            //marked active.  Note, this will also deactivate a message type for a messenger if the template
-            //cannot be successfully created during its attempt (only happens for global template attempts).
-            if (! empty($message_type_names)) {
-                $templates = EEH_MSG_Template::generate_new_templates($messenger->name, $message_type_names, 0, true);
-                EEH_MSG_Template::update_to_active(array($messenger->name), $message_type_names);
-            }
-        }
-        return $templates;
-    }
-
-
-    /**
-     * Activates given message types for the given EE_messenger object.
-     * Note: (very important) This method does not persist the activation to the database.
-     * See code implementing this method in this class for examples of how to persist.
-     *
-     * @param \EE_messenger $messenger
-     * @param  array        $message_type_names
-     * @return array
-     */
-    protected function _activate_message_types(EE_messenger $messenger, $message_type_names = array())
-    {
-        //If $message_type_names is empty, AND $this->_active_message_types is empty, then that means
-        //things have never been initialized (which should happen on EEH_Activation::generate_message_templates).
-        //So ONLY then do we need to actually grab defaults and cycle through them.  Otherwise we
-        //only override _active_message_types when an explicit array of $message_type_names has been provided.
-        $message_type_names = empty($message_type_names) && ! isset($this->_active_message_types[$messenger->name])
-            ? $messenger->get_default_message_types()
-            : (array)$message_type_names;
-
-        //now we ALWAYS need to make sure that the messenger is active for the message types we're activating!
-        if (! isset($this->_active_message_types[$messenger->name])) {
-            $this->_active_message_types[$messenger->name]['settings'] = array();
-        }
-
-        if ($message_type_names) {
-            // cycle thru message types
-            foreach ($message_type_names as $message_type_name) {
-                //only register the message type as active IF it isn't already active
-                //and if its actually installed.
-                if (
-                ! $this->is_message_type_active_for_messenger($messenger->name, $message_type_name)
-                ) {
-                    $this->add_settings_for_message_type($messenger->name, $message_type_name);
-                    $this->_set_messenger_has_activated_message_type(
-                        $messenger,
-                        $message_type_name
-                    );
-                }
-            }
-        }
-        return $message_type_names;
-    }
-
-
-    /**
-     * add_settings_for_message_type
-     * NOTE This does NOT automatically persist any settings to the db.  Client code should call
-     * $this->update_active_messengers_option to persist.
-     *
-     * @param  string $messenger_name    The name of the messenger adding the settings for
-     * @param  string $message_type_name The name of the message type adding the settings for
-     * @param  array  $new_settings      Any new settings being set for the message type and messenger
-     */
-    public function add_settings_for_message_type($messenger_name, $message_type_name, $new_settings = array())
-    {
-        // get installed message type from collection
-        $message_type      = $this->message_type_collection()->get_by_info($message_type_name);
-        $existing_settings = $this->get_message_type_settings_for_messenger($messenger_name, $message_type_name);
-        //we need to setup any initial settings for message types
-        if ($message_type instanceof EE_message_type) {
-            $default_settings = $message_type->get_admin_settings_fields();
-            foreach ($default_settings as $field => $values) {
-                if (isset($new_settings[$field])) {
-                    $existing_settings[$field] = $new_settings[$field];
-                    continue;
-                }
-                if (! isset($existing_settings[$field])) {
-                    $existing_settings[$field] = $values['default'];
-                }
-            }
-        }
-        $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings'] = $existing_settings;
-    }
-
-
-    /**
-     * Updates the internal cached _has_activated_messengers_and_message_types property with the given messenger
-     * and message type.
-     *
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @access protected
-     * @param \EE_messenger $messenger
-     * @param string        $message_type_name
-     */
-    protected function _set_messenger_has_activated_message_type(EE_messenger $messenger, $message_type_name)
-    {
-
-        //if _has_activated_messengers_and_message_types is empty then lets ensure its initialized
-        if (empty($this->_has_activated_messengers_and_message_types)) {
-            $this->get_has_activated_messengers_option();
-        }
-
-        // make sure this messenger has a record in the has_activated array
-        if (! isset($this->_has_activated_messengers_and_message_types[$messenger->name])) {
-            $this->_has_activated_messengers_and_message_types[$messenger->name] = array();
-        }
-        // check if message type has already been added
-        if (! in_array($message_type_name, $this->_has_activated_messengers_and_message_types[$messenger->name])) {
-            $this->_has_activated_messengers_and_message_types[$messenger->name][] = $message_type_name;
-        }
-    }
-
-
-    /**
-     * add_settings_for_messenger
-     * NOTE This does NOT automatically persist any settings to the db.  Client code should call
-     * $this->update_active_messengers_option to persist.
-     *
-     * @param string $messenger_name The name of the messenger the settings is being added for.
-     * @param array  $new_settings   An array of settings to update the existing settings.
-     */
-    public function add_settings_for_messenger($messenger_name, $new_settings = array())
-    {
-        $messenger = $this->get_messenger($messenger_name);
-        if ($messenger instanceof EE_messenger) {
-            $msgr_settings = $messenger->get_admin_settings_fields();
-            if (! empty($msgr_settings)) {
-                foreach ($msgr_settings as $field => $value) {
-                    //is there a new setting for this?
-                    if (isset($new_settings[$field])) {
-                        $this->_active_message_types[$messenger->name]['settings'][$field] = $new_settings[$field];
-                        continue;
-                    }
-                    //only set the default if it isn't already set.
-                    if (! isset($this->_active_message_types[$messenger->name]['settings'][$field])) {
-                        $this->_active_message_types[$messenger->name]['settings'][$field] = $value;
-                    }
-                }
-            }
-        }
-    }
-
-
-    /**
-     * deactivate_messenger
-     *
-     * @param  string|EE_messenger $messenger_name name of messenger
-     * @return void
-     */
-    public function deactivate_messenger($messenger_name)
-    {
-        $this->_initialize_collections();
-        if ($messenger_name instanceof EE_messenger) {
-            $messenger_name = $messenger_name->name;
-        }
-        unset($this->_active_messengers[$messenger_name]);
-        unset($this->_active_message_types[$messenger_name]);
-        $this->_message_template_group_model->deactivate_message_template_groups_for($messenger_name);
-        $this->update_active_messengers_option();
-    }
-
-
-    /**
-     * Deactivates a message type (note this will deactivate across all messenger's it is active on.
-     *
-     * @param  string $message_type_name     name of message type being deactivated
-     * @param bool    $set_has_active_record By default we always record the has_active record when deactivating a message
-     *                                       type.  However, this can be overridden if we don't want this set (usually when
-     *                                       this is called as a part of deregistration of a custom message type)
-     */
-    public function deactivate_message_type($message_type_name, $set_has_active_record = true)
-    {
-        $this->_initialize_collections();
-        if ($message_type_name instanceof EE_message_type) {
-            $message_type_name = $message_type_name->name;
-        }
-        foreach ($this->_active_message_types as $messenger_name => $settings) {
-            unset(
-                $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]
-            );
-
-            //we always record (even on deactivation) that a message type has been activated because there should at
-            //least be a record in the "has_activated" option that it WAS active at one point.
-            if ($set_has_active_record) {
-                $messenger = $this->get_messenger($messenger_name);
-                $this->_set_messenger_has_activated_message_type($messenger, $message_type_name);
-            }
-        }
-        $this->_message_template_group_model->deactivate_message_template_groups_for('', $message_type_name);
-        $this->update_active_messengers_option();
-        $this->update_has_activated_messengers_option();
-    }
-
-
-    /**
-     * Deactivates a message type for a specific messenger as opposed to all messengers.
-     *
-     * @param string $message_type_name Name of message type being deactivated.
-     * @param string $messenger_name    Name of messenger the message type is being deactivated for.
-     */
-    public function deactivate_message_type_for_messenger($message_type_name, $messenger_name)
-    {
-        $this->_initialize_collections();
-        if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
-            unset($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]);
-        }
-        $this->_message_template_group_model->deactivate_message_template_groups_for(array($messenger_name),
-            array($message_type_name));
-        $this->update_active_messengers_option();
-    }
-
-
-    /**
-     * Used to verify if a message can be sent for the given messenger and message type
-     * and that it is a generating messenger (used for generating message templates).
-     *
-     * @param EE_messenger    $messenger    messenger used in trigger
-     * @param EE_message_type $message_type message type used in trigger
-     * @return bool true is a generating messenger and can be sent OR FALSE meaning cannot send.
-     */
-    public function is_generating_messenger_and_active(EE_messenger $messenger, EE_message_type $message_type)
-    {
-        //get the $messengers the message type says it can be used with.
-        foreach ($message_type->with_messengers() as $generating_messenger => $secondary_messengers) {
-            if (
-                $messenger->name === $generating_messenger
-                && $this->is_message_type_active_for_messenger($messenger->name, $message_type->name)
-            ) {
-                return true;
-            }
-        }
-        return false;
-    }
-
-
-    /**
-     * This returns all the contexts that are registered by all message types.
-     * If $slugs_only is true,
-     * then just an array indexed by unique context slugs with the latest label representation for that slug.
-     * array(
-     *      'context_slug' => 'localized label for context obtained from latest message type in the loop'.
-     * );
-     * If $slugs_only is false, then the format is:
-     * array(
-     *      'message_type_name' => array(
-     *          'context_slug' => array(
-     *              'label' => 'localized label for context',
-     *              'description' => 'localized description for context'
-     *          )
-     *      )
-     * );
-     * Keep in mind that although different message types may share the same context slugs,
-     * it is possible that the context is described differently by the message type.
-     *
-     * @since 4.9.0
-     * @param   bool $slugs_only Whether to return an array of just slugs and labels (true)
-     *                           or all contexts indexed by message type.
-     * @return array
-     */
-    public function get_all_contexts($slugs_only = true)
-    {
-        $key = $slugs_only ? 'slugs' : 'all';
-        // check if contexts has been setup yet.
-        if (empty($this->_contexts[$key])) {
-            // So let's get all active message type objects and loop through to get all unique contexts
-            foreach ($this->get_active_message_type_objects() as $message_type) {
-                if ($message_type instanceof EE_message_type) {
-                    $message_type_contexts = $message_type->get_contexts();
-                    if ($slugs_only) {
-                        foreach ($message_type_contexts as $context => $context_details) {
-                            $this->_contexts[$key][$context] = $context_details['label'];
-                        }
-                    } else {
-                        $this->_contexts[$key][$message_type->name] = $message_type_contexts;
-                    }
-                }
-            }
-        }
-        return ! empty($this->_contexts[$key]) ? $this->_contexts[$key] : array();
-    }
-
-
-    /**
-     * This checks the internal record of what message types are considered "active" and verifies that
-     * there is an installed class definition for that message type.  If the active message type does not have a
-     * corresponding accessible message type class then it will be deactivated from all messengers it is active on and
-     * any related message templates will be inactivated as well.
-     *
-     * @return bool   true means all active message types are valid, false means at least one message type was
-     *                deactivated.
-     */
-    public function validate_active_message_types_are_installed()
-    {
-        $list_of_active_message_type_names = $this->list_of_active_message_types();
-        $installed_message_types           = $this->installed_message_types();
-        $all_message_types_valid           = true;
-        //loop through list of active message types and verify they are installed.
-        foreach ($list_of_active_message_type_names as $message_type_name) {
-            if (! isset($installed_message_types[$message_type_name])) {
-                $this->remove_message_type_has_been_activated_from_all_messengers(
-                    $message_type_name,
-                    true
-                );
-                $this->deactivate_message_type($message_type_name, false);
-                $all_message_types_valid = false;
-            }
-        }
-        return $all_message_types_valid;
-    }
-
-
-    /**
-     * This method checks the `ee_has_activated_messenger` option to see if the message type has ever been
-     * activated for the given messenger.  This can be called by client code on plugin updates etc to determine whether
-     * to attempt automatically reactivating message types that should be activated by default or not.
-     *
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @param $message_type_name
-     * @param $messenger_name
-     * @return bool
-     */
-    public function has_message_type_been_activated_for_messenger($message_type_name, $messenger_name)
-    {
-        $has_activated = $this->get_has_activated_messengers_option();
-        return isset($has_activated[$messenger_name])
-               && in_array($message_type_name, $has_activated[$messenger_name]);
-    }
-
-
-    /**
-     * This method unsets a message type from the given messenger has activated option.
-     *
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @param string $message_type_name
-     * @param string $messenger_name
-     * @param bool   $consider_current_state  Whether to consider whether the  message type is currently active or not.
-     *                                        If it is currently active, then remove.  Otherwise leave it alone.
-     */
-    public function remove_message_type_has_been_activated_for_messenger(
-        $message_type_name,
-        $messenger_name,
-        $consider_current_state = false
-    ) {
-        if ($consider_current_state
-            && ! $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)
-        ) {
-            //when consider current state is true, this means we don't want to change anything on the "has_activated"
-            //record if the message type is currently active for this messenger.  This is used when we want to retain
-            //the record for user initiated inactivations of the message type.
-            return;
-        }
-        $has_activated = $this->get_has_activated_messengers_option();
-        $key_for_message_type = isset($has_activated[$messenger_name])
-            ? array_search($message_type_name, $has_activated[$messenger_name], true)
-            : false;
-        if ($key_for_message_type !== false) {
-            unset($has_activated[$messenger_name][$key_for_message_type]);
-            $this->update_has_activated_messengers_option($has_activated);
-            //reset the internal cached property
-            $this->get_has_activated_messengers_option(true);
-        }
-    }
-
-
-    /**
-     * Removes a message type active record from all messengers it is attached to.
-     *
-     * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
-     *
-     * @param      $message_type_name
-     * @param bool $consider_current_state  Whether to consider whether the  message type is currently active or not.
-     *                                      If it is currently active, then remove.  Otherwise leave it alone.
-     */
-    public function remove_message_type_has_been_activated_from_all_messengers(
-        $message_type_name,
-        $consider_current_state = false
-    ) {
-        foreach(array_keys($this->get_has_activated_messengers_option()) as $messenger_name) {
-            $this->remove_message_type_has_been_activated_for_messenger(
-                $message_type_name,
-                $messenger_name,
-                $consider_current_state
-            );
-        }
-    }
+	/**
+	 * This option in the database is used to keep a record of message types that have been activated for a messenger
+	 * at some point in the history of the site.  It is utilized by the implementation of the 'force' flag in
+	 * EE_Register_Message_Type.  The force flag is an indication of whether a message type should be activated by
+	 * default when the message type is registered.  However, if a user has explicitly deactivated a message type, then
+	 * the force flag is ignored.  The method by which the code knows whether to ignore this flag is via this option.
+	 * Note, that this is NOT a historical record.  Its entirely possible for a message type to have been activated for
+	 * a messenger and yet not have a record in this option.  This occurs when a message type is inactivated through an
+	 * automated process (when an add-on registering the message type deactivates, or when some other code calls the
+	 * EE_Registery_Message_Type::deregister method) and the related record(s) is(are) removed from this option to ensure
+	 * the "force" flag is respected if that message type is later re-registered.
+	 *
+	 * This option should NOT be used to determine the current "active" state of a message type for a given messenger.
+	 *
+	 * The name of this option (and related methods/properties) is due to matching the original intended purpose for the
+	 * option that got superseded by later behaviour requirements.
+	 */
+	const HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME = 'ee_has_activated_messenger';
+
+	/**
+	 * @type boolean $_initialized
+	 */
+	protected $_initialized = false;
+
+	/**
+	 * @type EE_Messenger_Collection $_messenger_collection_loader
+	 */
+	protected $_messenger_collection_loader;
+
+	/**
+	 * @type EE_Message_Type_Collection $_message_type_collection_loader
+	 */
+	protected $_message_type_collection_loader;
+
+	/**
+	 * @type EEM_Message_Template_Group $_message_template_group_model
+	 */
+	protected $_message_template_group_model;
+
+	/**
+	 * @type EE_messenger[]
+	 */
+	protected $_installed_messengers = array();
+
+	/**
+	 * @type EE_message_type[]
+	 */
+	protected $_installed_message_types = array();
+
+	/**
+	 * Array of active messengers.
+	 * Format is this:
+	 * array(
+	 *      'messenger_name' => EE_messenger
+	 * )
+	 *
+	 * @type EE_messenger[]
+	 */
+	protected $_active_messengers = array();
+
+	/**
+	 * Formatted array of active message types grouped per messenger.
+	 * Format is this:
+	 * array(
+	 *      'messenger_name' => array(
+	 *          'settings' => array(
+	 *              '{messenger_name}-message_types' => array(
+	 *                  'message_type_name' => array() //variable array of settings corresponding to message type.
+	 *              )
+	 *          )
+	 *      )
+	 * )
+	 *
+	 * @type array
+	 */
+	protected $_active_message_types = array();
+
+
+	/**
+	 * This holds the array of messengers and their corresponding message types that have
+	 * been activated on a site at some point.  This is an important record that helps the messages system
+	 * not accidentally reactivate something that was intentionally deactivated by a user.
+	 *
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @type array
+	 */
+	protected $_has_activated_messengers_and_message_types = array();
+
+	/**
+	 * An array of unique message type contexts across all active message types.
+	 * The array will be indexed by either 'slugs' or 'all'.
+	 * The slugs index contains an array indexed by unique context slugs with the latest label representation for that
+	 * slug. array(
+	 *      'context_slug' => 'localized label for context obtained from latest message type in the loop'.
+	 * );
+	 * The all index returns an array in this format:
+	 * array(
+	 *      'message_type_name' => array(
+	 *          'context_slug' => array(
+	 *              'label' => 'localized label for context',
+	 *              'description' => 'localized description for context'
+	 *          )
+	 *      )
+	 * );
+	 *
+	 * @type array
+	 */
+	protected $_contexts = array();
+
+
+	/**
+	 * EE_Message_Resource_Manager constructor.
+	 *
+	 * @param \EE_Messenger_Collection_Loader    $Messenger_Collection_Loader
+	 * @param \EE_Message_Type_Collection_Loader $Message_Type_Collection_Loader
+	 * @param \EEM_Message_Template_Group        $Message_Template_Group_Model
+	 */
+	function __construct(
+		EE_Messenger_Collection_Loader $Messenger_Collection_Loader,
+		EE_Message_Type_Collection_Loader $Message_Type_Collection_Loader,
+		EEM_Message_Template_Group $Message_Template_Group_Model
+	) {
+		$this->_messenger_collection_loader    = $Messenger_Collection_Loader;
+		$this->_message_type_collection_loader = $Message_Type_Collection_Loader;
+		$this->_message_template_group_model   = $Message_Template_Group_Model;
+	}
+
+
+	/**
+	 * @return void
+	 */
+	protected function _initialize_collections()
+	{
+		if ($this->_initialized) {
+			return;
+		}
+		$this->_initialized = true;
+		$this->_messenger_collection_loader->load_messengers_from_folder();
+		$this->_message_type_collection_loader->load_message_types_from_folder();
+		$this->get_has_activated_messengers_option(true);
+		$this->_set_active_messengers_and_message_types();
+	}
+
+
+	/**
+	 * @return EE_Messenger_Collection
+	 */
+	public function messenger_collection()
+	{
+		$this->_initialize_collections();
+		return $this->_messenger_collection_loader->messenger_collection();
+	}
+
+
+	/**
+	 * @return EE_messenger[]
+	 */
+	public function active_messengers()
+	{
+		$this->_initialize_collections();
+		return $this->_active_messengers;
+	}
+
+
+	/**
+	 * @param string $messenger_name
+	 * @return \EE_messenger
+	 */
+	public function get_messenger($messenger_name)
+	{
+		return $this->messenger_collection()->get_by_info($messenger_name);
+	}
+
+
+	/**
+	 * This returns the corresponding EE_messenger object for the given string if it is active.
+	 *
+	 * @param string $messenger
+	 * @return EE_messenger | null
+	 */
+	public function get_active_messenger($messenger)
+	{
+		$this->_initialize_collections();
+		return ! empty($this->_active_messengers[$messenger]) ? $this->_active_messengers[$messenger] : null;
+	}
+
+
+	/**
+	 * @return \EE_messenger[]
+	 */
+	public function installed_messengers()
+	{
+		if (empty($this->_installed_messengers)) {
+			$this->_installed_messengers = array();
+			$this->messenger_collection()->rewind();
+			while ($this->messenger_collection()->valid()) {
+				$this->_installed_messengers[$this->messenger_collection()->current()->name] = $this->messenger_collection()->current();
+				$this->messenger_collection()->next();
+			}
+		}
+		return $this->_installed_messengers;
+	}
+
+
+	/**
+	 * @param string $messenger_name
+	 * @return \EE_messenger
+	 * @throws \EE_Error
+	 */
+	public function valid_messenger($messenger_name)
+	{
+		$messenger = $this->get_messenger($messenger_name);
+		if ($messenger instanceof EE_messenger) {
+			return $messenger;
+		}
+		throw new EE_Error(
+			sprintf(
+				__('The "%1$s" messenger is either invalid or not installed', 'event_espresso'),
+				$messenger_name
+			)
+		);
+	}
+
+
+	/**
+	 * @return EE_Message_Type_Collection
+	 */
+	public function message_type_collection()
+	{
+		$this->_initialize_collections();
+		return $this->_message_type_collection_loader->message_type_collection();
+	}
+
+
+	/**
+	 * @return array
+	 */
+	public function active_message_types()
+	{
+		$this->_initialize_collections();
+		return $this->_active_message_types;
+	}
+
+
+	/**
+	 * @param string $message_type_name
+	 * @return \EE_message_type
+	 */
+	public function get_message_type($message_type_name)
+	{
+		return $this->message_type_collection()->get_by_info($message_type_name);
+	}
+
+
+	/**
+	 * This returns the EE_message_type from the active message types array ( if present );
+	 *
+	 * @param string $messenger_name
+	 * @param string $message_type_name
+	 * @return \EE_message_type|null
+	 */
+	public function get_active_message_type_for_messenger($messenger_name, $message_type_name)
+	{
+		return $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)
+			? $this->get_message_type($message_type_name)
+			: null;
+	}
+
+
+	/**
+	 * Returns whether the given message type is active for the given messenger.
+	 *
+	 * @param string $messenger_name
+	 * @param string $message_type_name
+	 * @return bool
+	 */
+	public function is_message_type_active_for_messenger($messenger_name, $message_type_name)
+	{
+		$this->_initialize_collections();
+		return ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]);
+	}
+
+
+	/**
+	 * Returns whether the given messenger is active.
+	 *
+	 * @param string $messenger_name the name of the messenger to check if active.
+	 * @return bool
+	 */
+	public function is_messenger_active($messenger_name)
+	{
+		$this->_initialize_collections();
+		return ! empty($this->_active_message_types[$messenger_name]);
+	}
+
+
+	/**
+	 * This returns any settings that might be on a message type for a messenger
+	 *
+	 * @param string $messenger_name    The slug of the messenger
+	 * @param string $message_type_name The slug of the message type getting the settings for.
+	 * @return array
+	 */
+	public function get_message_type_settings_for_messenger($messenger_name, $message_type_name)
+	{
+		$settings = array();
+		if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
+			$settings = isset($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings'])
+				? $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings']
+				: array();
+		}
+		return $settings;
+	}
+
+
+	/**
+	 * Returns whether the given messenger name has active message types on it.
+	 * Infers whether the messenger is active or not as well.
+	 *
+	 * @param string $messenger_name
+	 * @return bool
+	 */
+	public function messenger_has_active_message_types($messenger_name)
+	{
+		$this->_initialize_collections();
+		return
+			! empty($this->_active_message_types[$messenger_name])
+			&& ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types']);
+	}
+
+
+	/**
+	 * This checks the _active_message_types property for any active message types
+	 * that are present for the given messenger and returns them.
+	 *
+	 * @since 4.9.0
+	 * @param string $messenger_name The messenger being checked
+	 * @return EE_message_type[]|array    (empty array if no active_message_types)
+	 */
+	public function get_active_message_types_for_messenger($messenger_name)
+	{
+		$message_types = array();
+		if (! $this->messenger_has_active_message_types($messenger_name)) {
+			return $message_types;
+		}
+		$installed_message_types = $this->installed_message_types();
+		foreach ($installed_message_types as $message_type_name => $message_type) {
+			if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
+				$message_types[$message_type_name] = $message_type;
+			}
+		}
+		return $message_types;
+	}
+
+
+	/**
+	 * This does NOT return the _active_message_types property but
+	 * simply returns an array of active message type names from that property.
+	 * (The _active_message_types property is indexed by messenger and active message_types per messenger).
+	 *
+	 * @return array message_type references (string)
+	 */
+	public function list_of_active_message_types()
+	{
+		$active_message_type_names = array();
+		$this->_initialize_collections();
+		foreach ($this->_active_message_types as $messenger => $messenger_settings) {
+			if (! isset($messenger_settings['settings'][$messenger . '-message_types'])) {
+				continue;
+			}
+			foreach ($messenger_settings['settings'][$messenger . '-message_types'] as $message_type_name => $message_type_config) {
+				if (! in_array($message_type_name, $active_message_type_names)) {
+					$active_message_type_names[] = $message_type_name;
+				}
+			}
+		}
+		return $active_message_type_names;
+	}
+
+
+	/**
+	 * Same as list_of_active_message_types() except this returns actual EE_message_type objects
+	 *
+	 * @since 4.9.0
+	 * @return \EE_message_type[]
+	 */
+	public function get_active_message_type_objects()
+	{
+		$active_message_types      = array();
+		$installed_message_types   = $this->installed_message_types();
+		$active_message_type_names = $this->list_of_active_message_types();
+		foreach ($active_message_type_names as $active_message_type_name) {
+			if (isset($installed_message_types[$active_message_type_name])) {
+				$active_message_types[$active_message_type_name] = $installed_message_types[$active_message_type_name];
+			}
+		}
+		return $active_message_types;
+	}
+
+
+	/**
+	 * @return \EE_message_type[]
+	 */
+	public function installed_message_types()
+	{
+		if (empty($this->_installed_message_types)) {
+			$this->message_type_collection()->rewind();
+			while ($this->message_type_collection()->valid()) {
+				$this->_installed_message_types[$this->message_type_collection()->current()->name] = $this->message_type_collection()->current();
+				$this->message_type_collection()->next();
+			}
+		}
+		return $this->_installed_message_types;
+	}
+
+
+	/**
+	 * @param string $message_type_name
+	 * @return \EE_message_type
+	 * @throws \EE_Error
+	 */
+	public function valid_message_type($message_type_name)
+	{
+		$message_type = $this->get_message_type($message_type_name);
+		if ($message_type instanceof EE_message_type) {
+			return $message_type;
+		}
+		throw new EE_Error(
+			sprintf(
+				__('The "%1$s" message type is either invalid or not installed', 'event_espresso'),
+				$message_type_name
+			)
+		);
+	}
+
+
+	/**
+	 * valid_message_type_for_messenger
+	 *
+	 * @param EE_messenger $messenger
+	 * @param string       $message_type_name
+	 * @return boolean
+	 * @throws \EE_Error
+	 */
+	public function valid_message_type_for_messenger(EE_messenger $messenger, $message_type_name)
+	{
+		$valid_message_types = $messenger->get_valid_message_types();
+		if (! in_array($message_type_name, $valid_message_types)) {
+			throw new EE_Error(
+				sprintf(
+					__(
+						'The message type (%1$s) sent to "%2$s" is not valid for the "%3$s" messenger.  Double-check the spelling and verify that message type has been registered as a valid type with the messenger.',
+						'event_espresso'
+					),
+					$message_type_name,
+					__METHOD__,
+					$messenger->name
+				)
+			);
+		}
+		return true;
+	}
+
+
+	/**
+	 * Used to return active messengers array stored in the wp options table.
+	 * If no value is present in the option then an empty array is returned.
+	 *
+	 * @param   bool $reset     If true then we ignore whether the option is cached on the _active_message_types
+	 *                          property and pull directly from the db.  Otherwise whatever is currently on the
+	 *                          $_active_message_types property is pulled.
+	 * @return array
+	 */
+	public function get_active_messengers_option($reset = false)
+	{
+		if ($reset) {
+			$this->_active_message_types = get_option('ee_active_messengers', array());
+		}
+		return $this->_active_message_types;
+	}
+
+
+	/**
+	 * Used to update the active messengers array stored in the wp options table.
+	 *
+	 * @param array $active_messenger_settings Incoming data to save.  If empty, then the internal cached property
+	 *                                         representing this data is used.
+	 * @return bool FALSE if not updated, TRUE if updated.
+	 */
+	public function update_active_messengers_option($active_messenger_settings = array())
+	{
+		$active_messenger_settings = empty($active_messenger_settings) ? $this->_active_message_types : $active_messenger_settings;
+		//make sure _active_message_types is updated (this is the internal cache for the settings).
+		$this->_active_message_types = $active_messenger_settings;
+		return update_option('ee_active_messengers', $active_messenger_settings);
+	}
+
+
+	/**
+	 * Used to return has activated message types for messengers array stored in the wp options table.
+	 * If no value is present in the option then an empty array is returned.
+	 * The value is cached on the $_has_activated_messengers_and_message_types property for future calls.
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @param   bool $reset Used to indicate that any cached value should be ignored.
+	 * @return array
+	 */
+	public function get_has_activated_messengers_option($reset = false)
+	{
+		if ($reset || empty($this->_has_activated_messengers_and_message_types)) {
+			$this->_has_activated_messengers_and_message_types = get_option(self::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME, array());
+		}
+		return $this->_has_activated_messengers_and_message_types;
+	}
+
+
+	/**
+	 * Used to update the has activated option in the db.
+	 *
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @param array $has_activated_messengers Incoming data to save.  If empty, then the internal cached property
+	 *                                        representing this data is used.
+	 * @return bool FALSE if not updated, TRUE if updated.
+	 */
+	public function update_has_activated_messengers_option($has_activated_messengers = array())
+	{
+		//make sure the option has been retrieved from first so we don't overwrite it accidentally.
+		if (empty($has_activated_messengers) && empty($this->_has_activated_messengers_and_message_types)) {
+			$this->get_has_activated_messengers_option();
+		}
+		$has_activated_messengers = empty($has_activated_messengers)
+			? $this->_has_activated_messengers_and_message_types
+			: $has_activated_messengers;
+		return update_option(self::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME, $has_activated_messengers);
+	}
+
+
+	/**
+	 * wrapper for _set_active_messengers_and_message_types()
+	 */
+	public function reset_active_messengers_and_message_types()
+	{
+		$this->_set_active_messengers_and_message_types();
+	}
+
+
+	/**
+	 * Generate list of active messengers and message types from collection.
+	 * This sets up the active messengers from what is present in the database.
+	 */
+	protected function _set_active_messengers_and_message_types()
+	{
+		//echo "\n\n " . __LINE__ . ") " . __METHOD__ . "() \n";
+		// list of activated messengers as set via the admin
+		// note calling `get_active_messengers_options` also initializes the _active_message_types property.
+		$this->get_active_messengers_option(true);
+		$this->ensure_messengers_are_active(array(), false, true);
+		$this->update_active_messengers_option();
+		$this->update_has_activated_messengers_option();
+	}
+
+
+	/**
+	 * Ensures that the specified messenger is currently active.
+	 * If not, activates it and its default message types.
+	 *
+	 * @param string $messenger_name
+	 * @param bool   $update_option Whether to update the option in the db or not.
+	 * @return boolean true if either already active or successfully activated.
+	 */
+	public function ensure_messenger_is_active($messenger_name, $update_option = true)
+	{
+		if (! isset($this->_active_messengers[$messenger_name])) {
+			try {
+				$this->activate_messenger($messenger_name, array(), $update_option);
+			} catch (EE_Error $e) {
+				EE_Error::add_error(
+					$e->getMessage(),
+					__FILE__,
+					__FUNCTION__,
+					__LINE__
+				);
+				return false;
+			}
+		}
+		return true;
+	}
+
+
+	/**
+	 * This ensures the given array of messenger names is active in the system.
+	 * Note, this method will not activate any NEW message types for the messenger when it is called. Instead,
+	 * it will automatically activate the default message types for the messenger if its not active.
+	 *
+	 * @param array $messenger_names  Array of messenger names for messengers to be activated.  If an empty array
+	 *                                (default) then will attempt to set the active messengers from the
+	 *                                activated_messengers option
+	 *                                (stored in $_active_message_types property).
+	 * @param bool  $update_option    Whether to update the related active messengers option.
+	 * @param bool  $verify           Whether to verify the messengers are installed before activating. Note if this is
+	 *                                set to true and a messenger is indicated as active, but is NOT installed, then it
+	 *                                will automatically be deactivated.
+	 */
+	public function ensure_messengers_are_active($messenger_names = array(), $update_option = true, $verify = false)
+	{
+		$messenger_names = empty($messenger_names) ? array_keys($this->_active_message_types) : $messenger_names;
+
+		$not_installed = array();
+		foreach ($messenger_names as $messenger_name) {
+			if ($verify && ! $this->messenger_collection()->has_by_name($messenger_name)) {
+				$not_installed[] = $messenger_name;
+				$this->deactivate_messenger($messenger_name);
+				continue;
+			}
+			$this->ensure_messenger_is_active($messenger_name, $update_option);
+		}
+
+		if (! empty($not_installed)) {
+			EE_Error::add_error(
+				sprintf(
+					__('The following messengers are either not installed or are invalid:%1$s %2$s', 'event_espresso'),
+					'<br />',
+					implode(', ', $not_installed)
+				),
+				__FILE__, __FUNCTION__, __LINE__
+			);
+		}
+	}
+
+
+	/**
+	 * Ensures that the specified message type for the given messenger is currently active, if not activates it.
+	 * This ALSO ensures that the given messenger is active as well!
+	 *
+	 * @param string $message_type_name message type name.
+	 * @param        $messenger_name
+	 * @param bool   $update_option     Whether to update the option in the db or not.
+	 * @return bool  Returns true if already is active or if was activated successfully.
+	 * @throws \EE_Error
+	 */
+	public function ensure_message_type_is_active($message_type_name, $messenger_name, $update_option = true)
+	{
+		// grab the messenger to work with.
+		$messenger = $this->valid_messenger($messenger_name);
+		if ($this->valid_message_type_for_messenger($messenger, $message_type_name)) {
+			//ensure messenger is active (that's an inherent coupling between active message types and the
+			//messenger they are being activated for.
+			try {
+				if (! $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
+					//all is good so let's just get it active
+					$this->activate_messenger($messenger_name, array($message_type_name), $update_option);
+				}
+			} catch (EE_Error $e) {
+				EE_Error::add_error(
+					$e->getMessage(),
+					__FILE__,
+					__FUNCTION__,
+					__LINE__
+				);
+				return false;
+			}
+		}
+		return true;
+	}
+
+
+	/**
+	 * This is a wrapper for `ensure_message_type_is_active` that will handle ensuring multiple message types for a
+	 * messenger are active in one go.
+	 *
+	 * @param array  $message_type_names Array of message type names to ensure are active.
+	 * @param string $messenger_name     The name of the messenger that the message types are to be activated on.
+	 * @param bool   $update_option      Whether to persist the activation to the database or not (default true).
+	 */
+	public function ensure_message_types_are_active($message_type_names, $messenger_name, $update_option = true)
+	{
+		$message_type_names = (array)$message_type_names;
+		foreach ($message_type_names as $message_type_name) {
+			// note, intentionally not updating option here because we're in a loop.
+			// We'll follow the instructions of the incoming $update_option argument after the loop.
+			$this->ensure_message_type_is_active($message_type_name, $messenger_name, false);
+		}
+		if ($update_option) {
+			$this->update_active_messengers_option();
+			$this->update_has_activated_messengers_option();
+		}
+	}
+
+
+	/**
+	 * Activates the specified messenger.
+	 *
+	 * @param string $messenger_name
+	 * @param array  $message_type_names        An array of message type names to activate with this messenger.
+	 *                                          If included we do NOT setup the default message types
+	 *                                          (assuming they are already setup.)
+	 * @param bool   $update_active_messengers_option
+	 * @return array of generated templates
+	 * @throws \EE_Error
+	 */
+	public function activate_messenger(
+		$messenger_name,
+		$message_type_names = array(),
+		$update_active_messengers_option = true
+	) {
+		$templates = array();
+		// grab the messenger to work with.
+		$messenger = $this->messenger_collection()->get_by_info($messenger_name);
+		// it's inactive. Activate it.
+		if ($messenger instanceof EE_messenger) {
+			$this->_active_messengers[$messenger->name] = $messenger;
+			//activate incoming message types set to be activated with messenger.
+			$message_type_names = $this->_activate_message_types($messenger, $message_type_names);
+			// setup any initial settings for the messenger if necessary.
+			$this->add_settings_for_messenger($messenger->name);
+			if ($update_active_messengers_option) {
+				$this->update_active_messengers_option();
+				$this->update_has_activated_messengers_option();
+			}
+			//generate new templates if necessary and ensure all related templates that are already in the database are
+			//marked active.  Note, this will also deactivate a message type for a messenger if the template
+			//cannot be successfully created during its attempt (only happens for global template attempts).
+			if (! empty($message_type_names)) {
+				$templates = EEH_MSG_Template::generate_new_templates($messenger->name, $message_type_names, 0, true);
+				EEH_MSG_Template::update_to_active(array($messenger->name), $message_type_names);
+			}
+		}
+		return $templates;
+	}
+
+
+	/**
+	 * Activates given message types for the given EE_messenger object.
+	 * Note: (very important) This method does not persist the activation to the database.
+	 * See code implementing this method in this class for examples of how to persist.
+	 *
+	 * @param \EE_messenger $messenger
+	 * @param  array        $message_type_names
+	 * @return array
+	 */
+	protected function _activate_message_types(EE_messenger $messenger, $message_type_names = array())
+	{
+		//If $message_type_names is empty, AND $this->_active_message_types is empty, then that means
+		//things have never been initialized (which should happen on EEH_Activation::generate_message_templates).
+		//So ONLY then do we need to actually grab defaults and cycle through them.  Otherwise we
+		//only override _active_message_types when an explicit array of $message_type_names has been provided.
+		$message_type_names = empty($message_type_names) && ! isset($this->_active_message_types[$messenger->name])
+			? $messenger->get_default_message_types()
+			: (array)$message_type_names;
+
+		//now we ALWAYS need to make sure that the messenger is active for the message types we're activating!
+		if (! isset($this->_active_message_types[$messenger->name])) {
+			$this->_active_message_types[$messenger->name]['settings'] = array();
+		}
+
+		if ($message_type_names) {
+			// cycle thru message types
+			foreach ($message_type_names as $message_type_name) {
+				//only register the message type as active IF it isn't already active
+				//and if its actually installed.
+				if (
+				! $this->is_message_type_active_for_messenger($messenger->name, $message_type_name)
+				) {
+					$this->add_settings_for_message_type($messenger->name, $message_type_name);
+					$this->_set_messenger_has_activated_message_type(
+						$messenger,
+						$message_type_name
+					);
+				}
+			}
+		}
+		return $message_type_names;
+	}
+
+
+	/**
+	 * add_settings_for_message_type
+	 * NOTE This does NOT automatically persist any settings to the db.  Client code should call
+	 * $this->update_active_messengers_option to persist.
+	 *
+	 * @param  string $messenger_name    The name of the messenger adding the settings for
+	 * @param  string $message_type_name The name of the message type adding the settings for
+	 * @param  array  $new_settings      Any new settings being set for the message type and messenger
+	 */
+	public function add_settings_for_message_type($messenger_name, $message_type_name, $new_settings = array())
+	{
+		// get installed message type from collection
+		$message_type      = $this->message_type_collection()->get_by_info($message_type_name);
+		$existing_settings = $this->get_message_type_settings_for_messenger($messenger_name, $message_type_name);
+		//we need to setup any initial settings for message types
+		if ($message_type instanceof EE_message_type) {
+			$default_settings = $message_type->get_admin_settings_fields();
+			foreach ($default_settings as $field => $values) {
+				if (isset($new_settings[$field])) {
+					$existing_settings[$field] = $new_settings[$field];
+					continue;
+				}
+				if (! isset($existing_settings[$field])) {
+					$existing_settings[$field] = $values['default'];
+				}
+			}
+		}
+		$this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings'] = $existing_settings;
+	}
+
+
+	/**
+	 * Updates the internal cached _has_activated_messengers_and_message_types property with the given messenger
+	 * and message type.
+	 *
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @access protected
+	 * @param \EE_messenger $messenger
+	 * @param string        $message_type_name
+	 */
+	protected function _set_messenger_has_activated_message_type(EE_messenger $messenger, $message_type_name)
+	{
+
+		//if _has_activated_messengers_and_message_types is empty then lets ensure its initialized
+		if (empty($this->_has_activated_messengers_and_message_types)) {
+			$this->get_has_activated_messengers_option();
+		}
+
+		// make sure this messenger has a record in the has_activated array
+		if (! isset($this->_has_activated_messengers_and_message_types[$messenger->name])) {
+			$this->_has_activated_messengers_and_message_types[$messenger->name] = array();
+		}
+		// check if message type has already been added
+		if (! in_array($message_type_name, $this->_has_activated_messengers_and_message_types[$messenger->name])) {
+			$this->_has_activated_messengers_and_message_types[$messenger->name][] = $message_type_name;
+		}
+	}
+
+
+	/**
+	 * add_settings_for_messenger
+	 * NOTE This does NOT automatically persist any settings to the db.  Client code should call
+	 * $this->update_active_messengers_option to persist.
+	 *
+	 * @param string $messenger_name The name of the messenger the settings is being added for.
+	 * @param array  $new_settings   An array of settings to update the existing settings.
+	 */
+	public function add_settings_for_messenger($messenger_name, $new_settings = array())
+	{
+		$messenger = $this->get_messenger($messenger_name);
+		if ($messenger instanceof EE_messenger) {
+			$msgr_settings = $messenger->get_admin_settings_fields();
+			if (! empty($msgr_settings)) {
+				foreach ($msgr_settings as $field => $value) {
+					//is there a new setting for this?
+					if (isset($new_settings[$field])) {
+						$this->_active_message_types[$messenger->name]['settings'][$field] = $new_settings[$field];
+						continue;
+					}
+					//only set the default if it isn't already set.
+					if (! isset($this->_active_message_types[$messenger->name]['settings'][$field])) {
+						$this->_active_message_types[$messenger->name]['settings'][$field] = $value;
+					}
+				}
+			}
+		}
+	}
+
+
+	/**
+	 * deactivate_messenger
+	 *
+	 * @param  string|EE_messenger $messenger_name name of messenger
+	 * @return void
+	 */
+	public function deactivate_messenger($messenger_name)
+	{
+		$this->_initialize_collections();
+		if ($messenger_name instanceof EE_messenger) {
+			$messenger_name = $messenger_name->name;
+		}
+		unset($this->_active_messengers[$messenger_name]);
+		unset($this->_active_message_types[$messenger_name]);
+		$this->_message_template_group_model->deactivate_message_template_groups_for($messenger_name);
+		$this->update_active_messengers_option();
+	}
+
+
+	/**
+	 * Deactivates a message type (note this will deactivate across all messenger's it is active on.
+	 *
+	 * @param  string $message_type_name     name of message type being deactivated
+	 * @param bool    $set_has_active_record By default we always record the has_active record when deactivating a message
+	 *                                       type.  However, this can be overridden if we don't want this set (usually when
+	 *                                       this is called as a part of deregistration of a custom message type)
+	 */
+	public function deactivate_message_type($message_type_name, $set_has_active_record = true)
+	{
+		$this->_initialize_collections();
+		if ($message_type_name instanceof EE_message_type) {
+			$message_type_name = $message_type_name->name;
+		}
+		foreach ($this->_active_message_types as $messenger_name => $settings) {
+			unset(
+				$this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]
+			);
+
+			//we always record (even on deactivation) that a message type has been activated because there should at
+			//least be a record in the "has_activated" option that it WAS active at one point.
+			if ($set_has_active_record) {
+				$messenger = $this->get_messenger($messenger_name);
+				$this->_set_messenger_has_activated_message_type($messenger, $message_type_name);
+			}
+		}
+		$this->_message_template_group_model->deactivate_message_template_groups_for('', $message_type_name);
+		$this->update_active_messengers_option();
+		$this->update_has_activated_messengers_option();
+	}
+
+
+	/**
+	 * Deactivates a message type for a specific messenger as opposed to all messengers.
+	 *
+	 * @param string $message_type_name Name of message type being deactivated.
+	 * @param string $messenger_name    Name of messenger the message type is being deactivated for.
+	 */
+	public function deactivate_message_type_for_messenger($message_type_name, $messenger_name)
+	{
+		$this->_initialize_collections();
+		if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
+			unset($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]);
+		}
+		$this->_message_template_group_model->deactivate_message_template_groups_for(array($messenger_name),
+			array($message_type_name));
+		$this->update_active_messengers_option();
+	}
+
+
+	/**
+	 * Used to verify if a message can be sent for the given messenger and message type
+	 * and that it is a generating messenger (used for generating message templates).
+	 *
+	 * @param EE_messenger    $messenger    messenger used in trigger
+	 * @param EE_message_type $message_type message type used in trigger
+	 * @return bool true is a generating messenger and can be sent OR FALSE meaning cannot send.
+	 */
+	public function is_generating_messenger_and_active(EE_messenger $messenger, EE_message_type $message_type)
+	{
+		//get the $messengers the message type says it can be used with.
+		foreach ($message_type->with_messengers() as $generating_messenger => $secondary_messengers) {
+			if (
+				$messenger->name === $generating_messenger
+				&& $this->is_message_type_active_for_messenger($messenger->name, $message_type->name)
+			) {
+				return true;
+			}
+		}
+		return false;
+	}
+
+
+	/**
+	 * This returns all the contexts that are registered by all message types.
+	 * If $slugs_only is true,
+	 * then just an array indexed by unique context slugs with the latest label representation for that slug.
+	 * array(
+	 *      'context_slug' => 'localized label for context obtained from latest message type in the loop'.
+	 * );
+	 * If $slugs_only is false, then the format is:
+	 * array(
+	 *      'message_type_name' => array(
+	 *          'context_slug' => array(
+	 *              'label' => 'localized label for context',
+	 *              'description' => 'localized description for context'
+	 *          )
+	 *      )
+	 * );
+	 * Keep in mind that although different message types may share the same context slugs,
+	 * it is possible that the context is described differently by the message type.
+	 *
+	 * @since 4.9.0
+	 * @param   bool $slugs_only Whether to return an array of just slugs and labels (true)
+	 *                           or all contexts indexed by message type.
+	 * @return array
+	 */
+	public function get_all_contexts($slugs_only = true)
+	{
+		$key = $slugs_only ? 'slugs' : 'all';
+		// check if contexts has been setup yet.
+		if (empty($this->_contexts[$key])) {
+			// So let's get all active message type objects and loop through to get all unique contexts
+			foreach ($this->get_active_message_type_objects() as $message_type) {
+				if ($message_type instanceof EE_message_type) {
+					$message_type_contexts = $message_type->get_contexts();
+					if ($slugs_only) {
+						foreach ($message_type_contexts as $context => $context_details) {
+							$this->_contexts[$key][$context] = $context_details['label'];
+						}
+					} else {
+						$this->_contexts[$key][$message_type->name] = $message_type_contexts;
+					}
+				}
+			}
+		}
+		return ! empty($this->_contexts[$key]) ? $this->_contexts[$key] : array();
+	}
+
+
+	/**
+	 * This checks the internal record of what message types are considered "active" and verifies that
+	 * there is an installed class definition for that message type.  If the active message type does not have a
+	 * corresponding accessible message type class then it will be deactivated from all messengers it is active on and
+	 * any related message templates will be inactivated as well.
+	 *
+	 * @return bool   true means all active message types are valid, false means at least one message type was
+	 *                deactivated.
+	 */
+	public function validate_active_message_types_are_installed()
+	{
+		$list_of_active_message_type_names = $this->list_of_active_message_types();
+		$installed_message_types           = $this->installed_message_types();
+		$all_message_types_valid           = true;
+		//loop through list of active message types and verify they are installed.
+		foreach ($list_of_active_message_type_names as $message_type_name) {
+			if (! isset($installed_message_types[$message_type_name])) {
+				$this->remove_message_type_has_been_activated_from_all_messengers(
+					$message_type_name,
+					true
+				);
+				$this->deactivate_message_type($message_type_name, false);
+				$all_message_types_valid = false;
+			}
+		}
+		return $all_message_types_valid;
+	}
+
+
+	/**
+	 * This method checks the `ee_has_activated_messenger` option to see if the message type has ever been
+	 * activated for the given messenger.  This can be called by client code on plugin updates etc to determine whether
+	 * to attempt automatically reactivating message types that should be activated by default or not.
+	 *
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @param $message_type_name
+	 * @param $messenger_name
+	 * @return bool
+	 */
+	public function has_message_type_been_activated_for_messenger($message_type_name, $messenger_name)
+	{
+		$has_activated = $this->get_has_activated_messengers_option();
+		return isset($has_activated[$messenger_name])
+			   && in_array($message_type_name, $has_activated[$messenger_name]);
+	}
+
+
+	/**
+	 * This method unsets a message type from the given messenger has activated option.
+	 *
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @param string $message_type_name
+	 * @param string $messenger_name
+	 * @param bool   $consider_current_state  Whether to consider whether the  message type is currently active or not.
+	 *                                        If it is currently active, then remove.  Otherwise leave it alone.
+	 */
+	public function remove_message_type_has_been_activated_for_messenger(
+		$message_type_name,
+		$messenger_name,
+		$consider_current_state = false
+	) {
+		if ($consider_current_state
+			&& ! $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)
+		) {
+			//when consider current state is true, this means we don't want to change anything on the "has_activated"
+			//record if the message type is currently active for this messenger.  This is used when we want to retain
+			//the record for user initiated inactivations of the message type.
+			return;
+		}
+		$has_activated = $this->get_has_activated_messengers_option();
+		$key_for_message_type = isset($has_activated[$messenger_name])
+			? array_search($message_type_name, $has_activated[$messenger_name], true)
+			: false;
+		if ($key_for_message_type !== false) {
+			unset($has_activated[$messenger_name][$key_for_message_type]);
+			$this->update_has_activated_messengers_option($has_activated);
+			//reset the internal cached property
+			$this->get_has_activated_messengers_option(true);
+		}
+	}
+
+
+	/**
+	 * Removes a message type active record from all messengers it is attached to.
+	 *
+	 * @see phpdocs on EE_Message_Resource_Manager::HAS_ACTIVATED_MESSAGE_TYPE_FOR_MESSENGER_OPTION_NAME for more details.
+	 *
+	 * @param      $message_type_name
+	 * @param bool $consider_current_state  Whether to consider whether the  message type is currently active or not.
+	 *                                      If it is currently active, then remove.  Otherwise leave it alone.
+	 */
+	public function remove_message_type_has_been_activated_from_all_messengers(
+		$message_type_name,
+		$consider_current_state = false
+	) {
+		foreach(array_keys($this->get_has_activated_messengers_option()) as $messenger_name) {
+			$this->remove_message_type_has_been_activated_for_messenger(
+				$message_type_name,
+				$messenger_name,
+				$consider_current_state
+			);
+		}
+	}
 }
 // End of file EE_Message_Resource_Manager.lib.php
 // Location: /EE_Message_Resource_Manager.lib.php

Spacing +27 added lines, -27 removed lines

@@ -1,6 +1,6 @@ 
 <?php
 
-if (! defined('EVENT_ESPRESSO_VERSION')) {
+if ( ! defined('EVENT_ESPRESSO_VERSION')) {
     exit('No direct script access allowed');
 }
 
@@ -297,7 +297,7 @@ 
     public function is_message_type_active_for_messenger($messenger_name, $message_type_name)
     {
         $this->_initialize_collections();
-        return ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]);
+        return ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types'][$message_type_name]);
     }
 
 
@@ -325,8 +325,8 @@ 
     {
         $settings = array();
         if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
-            $settings = isset($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings'])
-                ? $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings']
+            $settings = isset($this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types'][$message_type_name]['settings'])
+                ? $this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types'][$message_type_name]['settings']
                 : array();
         }
         return $settings;
@@ -345,7 +345,7 @@ 
         $this->_initialize_collections();
         return
             ! empty($this->_active_message_types[$messenger_name])
-            && ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types']);
+            && ! empty($this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types']);
     }
 
 
@@ -360,7 +360,7 @@ 
     public function get_active_message_types_for_messenger($messenger_name)
     {
         $message_types = array();
-        if (! $this->messenger_has_active_message_types($messenger_name)) {
+        if ( ! $this->messenger_has_active_message_types($messenger_name)) {
             return $message_types;
         }
         $installed_message_types = $this->installed_message_types();
@@ -385,11 +385,11 @@ 
         $active_message_type_names = array();
         $this->_initialize_collections();
         foreach ($this->_active_message_types as $messenger => $messenger_settings) {
-            if (! isset($messenger_settings['settings'][$messenger . '-message_types'])) {
+            if ( ! isset($messenger_settings['settings'][$messenger.'-message_types'])) {
                 continue;
             }
-            foreach ($messenger_settings['settings'][$messenger . '-message_types'] as $message_type_name => $message_type_config) {
-                if (! in_array($message_type_name, $active_message_type_names)) {
+            foreach ($messenger_settings['settings'][$messenger.'-message_types'] as $message_type_name => $message_type_config) {
+                if ( ! in_array($message_type_name, $active_message_type_names)) {
                     $active_message_type_names[] = $message_type_name;
                 }
             }
@@ -465,7 +465,7 @@ 
     public function valid_message_type_for_messenger(EE_messenger $messenger, $message_type_name)
     {
         $valid_message_types = $messenger->get_valid_message_types();
-        if (! in_array($message_type_name, $valid_message_types)) {
+        if ( ! in_array($message_type_name, $valid_message_types)) {
             throw new EE_Error(
                 sprintf(
                     __(
@@ -591,7 +591,7 @@ 
      */
     public function ensure_messenger_is_active($messenger_name, $update_option = true)
     {
-        if (! isset($this->_active_messengers[$messenger_name])) {
+        if ( ! isset($this->_active_messengers[$messenger_name])) {
             try {
                 $this->activate_messenger($messenger_name, array(), $update_option);
             } catch (EE_Error $e) {
@@ -636,7 +636,7 @@ 
             $this->ensure_messenger_is_active($messenger_name, $update_option);
         }
 
-        if (! empty($not_installed)) {
+        if ( ! empty($not_installed)) {
             EE_Error::add_error(
                 sprintf(
                     __('The following messengers are either not installed or are invalid:%1$s %2$s', 'event_espresso'),
@@ -667,7 +667,7 @@ 
             //ensure messenger is active (that's an inherent coupling between active message types and the
             //messenger they are being activated for.
             try {
-                if (! $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
+                if ( ! $this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
                     //all is good so let's just get it active
                     $this->activate_messenger($messenger_name, array($message_type_name), $update_option);
                 }
@@ -695,7 +695,7 @@ 
      */
     public function ensure_message_types_are_active($message_type_names, $messenger_name, $update_option = true)
     {
-        $message_type_names = (array)$message_type_names;
+        $message_type_names = (array) $message_type_names;
         foreach ($message_type_names as $message_type_name) {
             // note, intentionally not updating option here because we're in a loop.
             // We'll follow the instructions of the incoming $update_option argument after the loop.
@@ -741,7 +741,7 @@ 
             //generate new templates if necessary and ensure all related templates that are already in the database are
             //marked active.  Note, this will also deactivate a message type for a messenger if the template
             //cannot be successfully created during its attempt (only happens for global template attempts).
-            if (! empty($message_type_names)) {
+            if ( ! empty($message_type_names)) {
                 $templates = EEH_MSG_Template::generate_new_templates($messenger->name, $message_type_names, 0, true);
                 EEH_MSG_Template::update_to_active(array($messenger->name), $message_type_names);
             }
@@ -767,10 +767,10 @@ 
         //only override _active_message_types when an explicit array of $message_type_names has been provided.
         $message_type_names = empty($message_type_names) && ! isset($this->_active_message_types[$messenger->name])
             ? $messenger->get_default_message_types()
-            : (array)$message_type_names;
+            : (array) $message_type_names;
 
         //now we ALWAYS need to make sure that the messenger is active for the message types we're activating!
-        if (! isset($this->_active_message_types[$messenger->name])) {
+        if ( ! isset($this->_active_message_types[$messenger->name])) {
             $this->_active_message_types[$messenger->name]['settings'] = array();
         }
 
@@ -816,12 +816,12 @@ 
                     $existing_settings[$field] = $new_settings[$field];
                     continue;
                 }
-                if (! isset($existing_settings[$field])) {
+                if ( ! isset($existing_settings[$field])) {
                     $existing_settings[$field] = $values['default'];
                 }
             }
         }
-        $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]['settings'] = $existing_settings;
+        $this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types'][$message_type_name]['settings'] = $existing_settings;
     }
 
 
@@ -844,11 +844,11 @@ 
         }
 
         // make sure this messenger has a record in the has_activated array
-        if (! isset($this->_has_activated_messengers_and_message_types[$messenger->name])) {
+        if ( ! isset($this->_has_activated_messengers_and_message_types[$messenger->name])) {
             $this->_has_activated_messengers_and_message_types[$messenger->name] = array();
         }
         // check if message type has already been added
-        if (! in_array($message_type_name, $this->_has_activated_messengers_and_message_types[$messenger->name])) {
+        if ( ! in_array($message_type_name, $this->_has_activated_messengers_and_message_types[$messenger->name])) {
             $this->_has_activated_messengers_and_message_types[$messenger->name][] = $message_type_name;
         }
     }
@@ -867,7 +867,7 @@ 
         $messenger = $this->get_messenger($messenger_name);
         if ($messenger instanceof EE_messenger) {
             $msgr_settings = $messenger->get_admin_settings_fields();
-            if (! empty($msgr_settings)) {
+            if ( ! empty($msgr_settings)) {
                 foreach ($msgr_settings as $field => $value) {
                     //is there a new setting for this?
                     if (isset($new_settings[$field])) {
@@ -875,7 +875,7 @@ 
                         continue;
                     }
                     //only set the default if it isn't already set.
-                    if (! isset($this->_active_message_types[$messenger->name]['settings'][$field])) {
+                    if ( ! isset($this->_active_message_types[$messenger->name]['settings'][$field])) {
                         $this->_active_message_types[$messenger->name]['settings'][$field] = $value;
                     }
                 }
@@ -919,7 +919,7 @@ 
         }
         foreach ($this->_active_message_types as $messenger_name => $settings) {
             unset(
-                $this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]
+                $this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types'][$message_type_name]
             );
 
             //we always record (even on deactivation) that a message type has been activated because there should at
@@ -945,7 +945,7 @@ 
     {
         $this->_initialize_collections();
         if ($this->is_message_type_active_for_messenger($messenger_name, $message_type_name)) {
-            unset($this->_active_message_types[$messenger_name]['settings'][$messenger_name . '-message_types'][$message_type_name]);
+            unset($this->_active_message_types[$messenger_name]['settings'][$messenger_name.'-message_types'][$message_type_name]);
         }
         $this->_message_template_group_model->deactivate_message_template_groups_for(array($messenger_name),
             array($message_type_name));
@@ -1039,7 +1039,7 @@ 
         $all_message_types_valid           = true;
         //loop through list of active message types and verify they are installed.
         foreach ($list_of_active_message_type_names as $message_type_name) {
-            if (! isset($installed_message_types[$message_type_name])) {
+            if ( ! isset($installed_message_types[$message_type_name])) {
                 $this->remove_message_type_has_been_activated_from_all_messengers(
                     $message_type_name,
                     true
@@ -1120,7 +1120,7 @@ 
         $message_type_name,
         $consider_current_state = false
     ) {
-        foreach(array_keys($this->get_has_activated_messengers_option()) as $messenger_name) {
+        foreach (array_keys($this->get_has_activated_messengers_option()) as $messenger_name) {
             $this->remove_message_type_has_been_activated_for_messenger(
                 $message_type_name,
                 $messenger_name,