Issue #3432343: Add configuration for recipients plugin

Closes #3432343

src/Service/MessageProvider.php

@@ -18,7 +18,7 @@ use Drupal\message\Entity\MessageTemplate;
 use Drupal\message\MessageInterface;
 use Drupal\message_notify\MessageNotifier;
 use Drupal\message_plus\Form\EntityTemplateSettingsForm;
-use Drupal\user\EntityOwnerInterface;
+use Drupal\message_plus\MessageRecipientsPluginManager;
 
 /**
  * Message helper.
@@ -68,6 +68,8 @@ class MessageProvider {
    *   Queue factory.
    * @param \Drupal\Core\Config\ConfigFactoryInterface $configFactory
    *   The config factory.
+   * @param \Drupal\message_plus\MessageRecipientsPluginManager $messageRecipientsManager
+   *   The recipients message plugin manager.
    */
   public function __construct(
     protected readonly EntityTypeManagerInterface $entityTypeManager,
@@ -75,7 +77,8 @@ class MessageProvider {
     protected readonly AccountInterface $currentUser,
     LoggerChannelFactory $logger_channel_factory,
     QueueFactory $queue_factory,
-    protected readonly ConfigFactoryInterface $configFactory
+    protected readonly ConfigFactoryInterface $configFactory,
+    protected readonly MessageRecipientsPluginManager $messageRecipientsManager
   ) {
     $this->queue = $queue_factory->get(static::MESSAGE_QUEUE_WORKER);
     $this->logger = $logger_channel_factory->get('message_plus');
@@ -272,10 +275,17 @@ class MessageProvider {
    */
   protected function getDefaultRecipients(MessageInterface $message, ContentEntityInterface $entity) {
     $recipients = [];
-    // @todo Move functionality to plugins.
-    $recipients[] = $entity instanceof EntityOwnerInterface
-      ? $entity->getOwner()
-      : $message->getOwner();
+    $template_recipients = $message->getTemplate()
+      ->getThirdPartySetting('message_plus', 'recipients', []);
+
+    if (
+      !empty($template_recipients['plugin_id']) &&
+      !empty($template_recipients['configuration']) &&
+      $recipients_plugin = $this->messageRecipientsManager
+        ->createInstance($template_recipients['plugin_id'], $template_recipients['configuration'])
+    ) {
+      $recipients = $recipients_plugin->getRecipients($entity);
+    }
 
     return $recipients;
   }