Send Updates to Blog Actor in dual mode

includes/class-dispatcher.php

@@ -29,6 +29,7 @@ public static function init() {
 		\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'add_inboxes_of_follower' ), 10, 2 );
 		\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'add_inboxes_by_mentioned_actors' ), 10, 3 );
 		\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'add_inboxes_of_replied_urls' ), 10, 3 );
+		\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'maybe_add_inboxes_of_blog_user' ), 10, 3 );
 	}
 
 	/**
@@ -203,4 +204,34 @@ public static function add_inboxes_of_replied_urls( $inboxes, $actor_id, $activi
 
 		return $inboxes;
 	}
+
+	/**
+	 * Adds Blog Actor inboxes to Updates so the Blog User's followers are notified of edits.
+	 *
+	 * @param array $inboxes  The list of Inboxes.
+	 * @param int   $actor_id The WordPress Actor-ID.
+	 * @param array $activity The ActivityPub Activity.
+	 *
+	 * @return array The filtered Inboxes
+	 */
+	public static function maybe_add_inboxes_of_blog_user( $inboxes, $actor_id, $activity ) {
+		// Only if we're in both Blog and User modes.
+		if ( ACTIVITYPUB_ACTOR_AND_BLOG_MODE !== \get_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_MODE ) ) {
+			return $inboxes;
+		}
+		// Only if this isn't the Blog Actor.
+		if ( Actors::BLOG_USER_ID === $actor_id ) {
+			return $inboxes;
+		}
+		// Only if this is an Update.
+		if ( 'Update' !== $activity->get_type() ) {
+			return $inboxes;
+		}
+
+		$blog_inboxes = Followers::get_inboxes( Actors::BLOG_USER_ID );
+		$inboxes      = array_merge( $inboxes, $blog_inboxes );
+		$inboxes      = array_unique( $inboxes );
+
+		return $inboxes;
+	}
 }

tests/includes/class-test-dispatcher.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * Test Dispatcher Class.
+ *
+ * @package ActivityPub
+ */
+
+use Activitypub\Activity\Activity;
+use Activitypub\Collection\Actors;
+use Activitypub\Collection\Followers;
+use Activitypub\Dispatcher;
+
+
+/**
+ * Test class for Activitypub Dispatcher.
+ *
+ * @covers Activitypub\Dispatcher
+ */
+class Test_Dispatcher extends WP_UnitTestCase {
+	/**
+	 * Test maybe_add_inboxes_of_blog_user when actor mode is not ACTIVITYPUB_ACTOR_AND_BLOG_MODE
+	 */
+	public function test_maybe_add_inboxes_of_blog_user_wrong_mode() {
+		update_option( 'activitypub_actor_mode', ACTIVITYPUB_BLOG_MODE );
+
+		$inboxes  = array( 'https://example.com/inbox' );
+		$activity = $this->createMock( Activity::class );
+
+		$result = Dispatcher::maybe_add_inboxes_of_blog_user( $inboxes, 123, $activity );
+		$this->assertEquals( $inboxes, $result );
+	}
+
+	/**
+	 * Test maybe_add_inboxes_of_blog_user when actor is blog user
+	 */
+	public function test_maybe_add_inboxes_of_blog_user_is_blog_user() {
+		update_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_AND_BLOG_MODE );
+
+		$inboxes  = array( 'https://example.com/inbox' );
+		$activity = $this->createMock( Activity::class );
+
+		$result = Dispatcher::maybe_add_inboxes_of_blog_user( $inboxes, Actors::BLOG_USER_ID, $activity );
+		$this->assertEquals( $inboxes, $result );
+	}
+
+	/**
+	 * Test maybe_add_inboxes_of_blog_user when activity type is not Update
+	 */
+	public function test_maybe_add_inboxes_of_blog_user_not_update() {
+		update_option( 'activitypub_actor_mode', ACTIVITYPUB_ACTOR_AND_BLOG_MODE );
+
+		$inboxes  = array( 'https://example.com/inbox' );
+		$activity = $this->createMock( Activity::class );
+
+		// Mock the static method using reflection.
+		$activity->expects( $this->once() )
+			->method( '__call' )
+			->with( 'get_type' )
+			->willReturn( 'Create' );
+
+		$result = Dispatcher::maybe_add_inboxes_of_blog_user( $inboxes, 123, $activity );
+		$this->assertEquals( $inboxes, $result );
+	}
+}