decouple the adding/removing of follow relationships from adding/removing followers

also use post_content, and post_content_filtered to store the followers json object and inbox

fix phpcs

remove commented out code

includes/activity/class-base-object.php

@@ -572,7 +572,7 @@ class Base_Object {
 	/**
 	 * Convert JSON input to an array.
 	 *
-	 * @return string The object array.
+	 * @param string The object array.
 	 *
 	 * @return \Activitypub\Activity\Base_Object An Object built from the JSON string.
 	 */

includes/class-activitypub.php

@@ -444,18 +444,6 @@ class Activitypub {
 			)
 		);
 
-		register_post_meta(
-			Followers::POST_TYPE,
-			'activitypub_actor_json',
-			array(
-				'type'              => 'string',
-				'single'            => true,
-				'sanitize_callback' => function ( $value ) {
-					return sanitize_text_field( $value );
-				},
-			)
-		);
-
 		do_action( 'activitypub_after_register_post_type' );
 	}
 

includes/collection/class-followers.php

@@ -21,7 +21,9 @@ class Followers {
 	const CACHE_KEY_INBOXES = 'follower_inboxes_%s';
 
 	/**
-	 * Add new Follower
+	 * Add new Follower.
+	 *
+	 * This does not add the follow relationship. It is added when the Accept respone is sent.
 	 *
 	 * @param int    $user_id The ID of the WordPress User
 	 * @param string $actor   The Actor URL
@@ -49,6 +51,16 @@ class Followers {
 			return $follower_id;
 		}
 
+		return $follower;
+	}
+
+	/**
+	 * Add the follow relationship.
+	 *
+	 * @param int|string $user_id     The internal id of the target WordPress user that gets followed.
+	 * @param int|string $follower_id The internal id of the follower actor.
+	 */
+	public static function add_follow_relationship( $user_id, $follower_id ) {
 		$post_meta = get_post_meta( $follower_id, 'activitypub_user_id' );
 
 		// phpcs:ignore WordPress.PHP.StrictInArray.MissingTrueStrict
@@ -59,8 +71,6 @@ class Followers {
 			// Reset the cached inboxes for the followed user
 			wp_cache_delete( sprintf( self::CACHE_KEY_INBOXES, $user_id ), 'activitypub' );
 		}
-
-		return $follower;
 	}
 
 	/**
@@ -71,7 +81,7 @@ class Followers {
 	 *
 	 * @return bool|WP_Error True on success, false or WP_Error on failure.
 	 */
-	public static function remove_follower( $user_id, $actor ) {
+	public static function remove_follow_relationship( $user_id, $actor ) {
 		wp_cache_delete( sprintf( self::CACHE_KEY_INBOXES, $user_id ), 'activitypub' );
 
 		$follower = self::get_follower( $user_id, $actor );
@@ -114,6 +124,18 @@ class Followers {
 		return null;
 	}
 
+	/**
+	 * Get a Follower by the internal ID.
+	 *
+	 * @param int $user_id The post ID of the WordPress Follower custom post type post.
+	 *
+	 * @return \Activitypub\Model\Follower|null The Follower object or null
+	 */
+	public static function get_follower_by_id( $follower_id ) {
+		$post = get_post( $follower_id );
+		return Follower::init_from_cpt( $post );
+	}
+
 	/**
 	 * Get a Follower by Actor indepenent from the User.
 	 *
@@ -181,7 +203,7 @@ class Followers {
 				),
 			),
 		);
-
+		// TODO: handle follower with empty post_content or inbox which is saved in post_content_filtered
 		$args = wp_parse_args( $args, $defaults );
 		$query = new WP_Query( $args );
 		$total = $query->found_posts;
@@ -204,18 +226,6 @@ class Followers {
 	public static function get_all_followers() {
 		$args = array(
 			'nopaging'   => true,
-			// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
-			'meta_query' => array(
-				'relation' => 'AND',
-				array(
-					'key'     => 'activitypub_inbox',
-					'compare' => 'EXISTS',
-				),
-				array(
-					'key'     => 'activitypub_actor_json',
-					'compare' => 'EXISTS',
-				),
-			),
 		);
 		return self::get_followers( null, null, null, $args );
 	}
@@ -239,18 +249,10 @@ class Followers {
 						'key'   => 'activitypub_user_id',
 						'value' => $user_id,
 					),
-					array(
-						'key'     => 'activitypub_inbox',
-						'compare' => 'EXISTS',
-					),
-					array(
-						'key'     => 'activitypub_actor_json',
-						'compare' => 'EXISTS',
-					),
 				),
 			)
 		);
-
+		// TODO: handle follower with empty post_content or inbox which is saved in post_content_filtered
 		return $query->found_posts;
 	}
 
@@ -263,6 +265,7 @@ class Followers {
 	 */
 	public static function get_inboxes( $user_id ) {
 		$cache_key = sprintf( self::CACHE_KEY_INBOXES, $user_id );
+		// TODO: enable caching of the inboxes: this is only for debugging purpose.
 		// $inboxes = wp_cache_get( $cache_key, 'activitypub' );
 
 		// if ( $inboxes ) {
@@ -278,19 +281,10 @@ class Followers {
 				// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
 				'meta_query' => array(
 					'relation' => 'AND',
-					array(
-						'key'     => 'activitypub_inbox',
-						'compare' => 'EXISTS',
-					),
 					array(
 						'key'   => 'activitypub_user_id',
 						'value' => $user_id,
 					),
-					array(
-						'key'     => 'activitypub_inbox',
-						'value'   => '',
-						'compare' => '!=',
-					),
 				),
 			)
 		);
@@ -301,42 +295,16 @@ class Followers {
 			return array();
 		}
 
-		$user = Users::get_by_id( $user_id );
-
-		if ( $user->get_manually_approved_followers() ) {
-			$accepted_follow_requests_query = new WP_Query(
-				array(
-					'nopaging'        => true,
-					'post_type'       => 'ap_follow_request',
-					'fields'          => 'id=>parent',
-					'post_status'     => 'publish',
-					'post_parent__in' => $follower_ids,
-					// phpcs:ign ore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
-					'meta_query' => array(
-						'relation' => 'AND',
-						array(
-							'key'   => 'activitypub_user_id',
-							'value' => $user_id,
-						),
-					),
-				)
-			);
-		}
-		$accepted_follow_requests = $accepted_follow_requests_query->get_posts();
-
 		global $wpdb;
 		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
-		$results = $wpdb->get_col(
+		$inboxes = $wpdb->get_col(
 			$wpdb->prepare(
-				"SELECT DISTINCT meta_value FROM {$wpdb->postmeta}
-				WHERE post_id IN (" . implode( ', ', array_fill( 0, count( $follower_ids ), '%d' ) ) . ")
-				AND meta_key = 'activitypub_inbox'
-				AND meta_value IS NOT NULL",
+				"SELECT DISTINCT post_content_filtered FROM {$wpdb->posts}
+				 WHERE ID IN (" . implode( ', ', array_fill( 0, count( $follower_ids ), '%d' ) ) . ')',
 				$follower_ids
 			)
 		);
 
-		$inboxes = array_filter( $results );
 		wp_cache_set( $cache_key, $inboxes, 'activitypub' );
 
 		return $inboxes;

includes/handler/class-follow.php

@@ -75,17 +75,17 @@ class Follow {
 	 *
 	 * @return void
 	 */
-	public static function send_follow_response( $user, $follower, $object, $type ) {
+	public static function send_follow_response( $user, $inbox, $object, $type ) {
 		// send activity
 		$activity = new Activity();
 		$activity->set_type( $type );
 		$activity->set_object( $object );
 		$activity->set_actor( $user->get_id() );
-		$activity->set_to( $follower->get_id() );
-		$activity->set_id( $user->get_id() . '#accept-' . \preg_replace( '~^https?://~', '', $follower->get_id() ) . '-' . \time() );
+		$activity->set_to( $object['actor'] );
+		$activity->set_id( $user->get_id() . '#accept-' . \preg_replace( '~^https?://~', '', $object['actor'] ) . '-' . \time() );
 
 		$activity = $activity->to_json();
 
-		Http::post( $follower->get_shared_inbox(), $activity, $user->get__id() );
+		Http::post( $inbox, $activity, $user->get__id() );
 	}
 }

includes/handler/class-undo.php

@@ -23,6 +23,8 @@ class Undo {
 	 *
 	 * @param array $activity The JSON "Undo" Activity
 	 * @param int   $user_id  The ID of the ID of the WordPress User
+	 *
+	 * @return void
 	 */
 	public static function handle_undo( $activity ) {
 		if (

includes/model/class-follow-request.php

@@ -3,11 +3,11 @@ namespace Activitypub\Model;
 
 use WP_Error;
 
-use Activitypub\Activity\Activity;
 use Activitypub\Activity\Base_Object;
+use Activitypub\Collection\Followers;
 use Activitypub\Collection\Users;
 use Activitypub\Model\Follower;
-use Activitypub\Http;
+
 
 /**
  * ActivityPub Follow Class
@@ -21,6 +21,8 @@ use Activitypub\Http;
  */
 class Follow_Request extends Base_Object {
 	const FOLLOW_REQUEST_POST_TYPE = 'ap_follow_request';
+	const FOLLOW_REQUEST_STATUS_APPROVED = 'approved';
+	const FOLLOW_REQUEST_STATUS_REJECTED = 'rejected';
 
 	/**
 	 * Stores theinternal  WordPress post id of the post of type ap_follow_request
@@ -113,6 +115,13 @@ class Follow_Request extends Base_Object {
 		return $follow_request;
 	}
 
+	/**
+	 * Get the internal ID of the follower who issues the follow request.
+	 */
+	private function get_follower_id() {
+		return wp_get_post_parent_id( $this->get__id() );
+	}
+
 	/**
 	 * Save the current Follower-Object.
 	 *
@@ -155,34 +164,62 @@ class Follow_Request extends Base_Object {
 	}
 
 	/**
-	 * Reject the follow request
+	 * Get the URL/URI of the Follower that issued the follow request.
+	 *
+	 * @return string The url/uri of the follower.
 	 */
-	public function reject() {
+	private function get_follower_actor() {
+		$follower_id = wp_get_post_parent_id( $this->get__id() );
+		$follower = Follower::init_from_cpt( get_post( $follower_id ) );
+		return $follower->get_id();
+	}
+
+	/**
+	 * Save the status of the follow request.
+	 *
+	 * @param string $status The new status of the follow request.
+	 */
+	private function save_follow_request_status( $status ) {
 		wp_update_post(
 			array(
 				'ID' => $this->get__id(),
-				'post_status' => 'rejected',
+				'post_status' => $status,
 			)
 		);
+	}
+
+	/**
+	 * Reject the follow request.
+	 */
+	public function reject() {
+		$user_id = get_post_meta( $this->get__id(), 'activitypub_user_id', true );
+		$actor   = $this->get_follower_actor();
+
+		Followers::remove_follow_relationship( $user_id, $actor );
+
+		$this->save_follow_request_status( self::FOLLOW_REQUEST_STATUS_REJECTED );
+
 		$this->send_response( 'Reject' );
+
 		$this->delete();
 	}
 
 	/**
-	 * Approve the follow request
+	 * Approve the follow request.
 	 */
 	public function approve() {
-		wp_update_post(
-			array(
-				'ID' => $this->get__id(),
-				'post_status' => 'approved',
-			)
-		);
+		$user_id     = get_post_meta( $this->get__id(), 'activitypub_user_id', true );
+		$follower_id = $this->get_follower_id();
+
+		Followers::add_follow_relationship( $user_id, $follower_id );
+
+		$this->save_follow_request_status( self::FOLLOW_REQUEST_STATUS_APPROVED );
+
 		$this->send_response( 'Accept' );
 	}
 
 	/**
-	 * Delete the follow request
+	 * Delete the follow request.
 	 *
 	 * This should only be called after it has been rejected.
 	 */
@@ -197,18 +234,17 @@ class Follow_Request extends Base_Object {
 		$user_id = get_post_meta( $this->get__id(), 'activitypub_user_id', true );
 		$user    = Users::get_by_id( $user_id );
 
-		$follower_id = wp_get_post_parent_id( $this->get__id() );
-		$follower = Follower::init_from_cpt( get_post( $follower_id ) );
+		$follower_id = $this->get_follower_id();
 
-		$actor = $follower->get_id();
+		$follower_inbox = get_post_field( 'post_content_filtered', $follower_id );
 
-		$object = array(
+		// Reconstruct the follow_object.
+		$follow_object = array(
 			'id'    => $this->get_id(),
 			'type'  => $this->get_type(),
-			'actor' => $actor,
 			'object' => $user,
 		);
 
-		do_action( 'activitypub_send_follow_response', $user, $follower, $object, $type );
+		do_action( 'activitypub_send_follow_response', $user, $follower_inbox, $follow_object, $type );
 	}
 }

includes/model/class-follower.php

@@ -178,7 +178,9 @@ class Follower extends Actor {
 			'post_name'             => esc_url_raw( $this->get_id() ),
 			'post_excerpt'          => sanitize_text_field( wp_kses( $this->get_summary(), 'user_description' ) ),
 			'post_status'           => 'publish',
-			'meta_input'   => $this->get_post_meta_input(),
+			'post_content'          => $this->to_json(),
+			'post_mime_type'        => 'application/json',
+			'post_content_filtered' => $this->get_shared_inbox(),
 		);
 
 		$post_id = wp_insert_post( $args );
@@ -202,7 +204,7 @@ class Follower extends Actor {
 	 * Beware that this os deleting a Follower for ALL users!!!
 	 *
 	 * To delete only the User connection (unfollow)
-	 * @see \Activitypub\Rest\Followers::remove_follower()
+	 * @see \Activitypub\Rest\Followers::remove_follow_relationship()
 	 *
 	 * @return void
 	 */
@@ -210,18 +212,20 @@ class Follower extends Actor {
 		wp_delete_post( $this->_id );
 	}
 
-	/**
-	 * Update the post meta.
-	 *
-	 * @return void
-	 */
-	protected function get_post_meta_input() {
-		$meta_input = array();
-		$meta_input['activitypub_inbox'] = $this->get_shared_inbox();
-		$meta_input['activitypub_actor_json'] = $this->to_json();
+	// /**
+	//  * Update the post meta.
+	//  *
+	//  * @return void
+	//  */
+	// protected function get_post_meta_input() {
+	//  $meta_input = array();
+	//  // TODO: migrations - moved to post_content
+	//  $meta_input['activitypub_inbox'] = $this->get_shared_inbox();
+	//  // TODO: migrations - moved to post_content_filtered
+	//  $meta_input['activitypub_actor_json'] = $this->to_json();
 
-		return $meta_input;
-	}
+	//  return $meta_input;
+	// }
 
 	/**
 	 * Get the icon.

tests/test-class-activitypub-followers.php

@@ -185,7 +185,7 @@ class Test_Activitypub_Followers extends WP_UnitTestCase {
 		$follower2 = \Activitypub\Collection\Followers::get_follower( 2, 'https://example.com/author/jon' );
 		$this->assertEquals( 'https://example.com/author/jon', $follower2->get_url() );
 
-		\Activitypub\Collection\Followers::remove_follower( 1, 'https://example.com/author/jon' );
+		\Activitypub\Collection\Followers::remove_follow_relationship( 1, 'https://example.com/author/jon' );
 
 		$follower = \Activitypub\Collection\Followers::get_follower( 1, 'https://example.com/author/jon' );
 		$this->assertNull( $follower );