change_wp_user_id( $user_id ); } $user_id = $transformer->get_wp_user_id(); if ( is_user_disabled( $user_id ) ) { return; } $activity = $transformer->to_activity( $type ); self::send_activity_to_followers( $activity, $user_id, $wp_object ); } /** * Send Announces to followers and mentioned users. * * @param mixed $wp_object The ActivityPub Post. * @param string $type The Activity-Type. */ public static function send_announce( $wp_object, $type ) { if ( ! in_array( $type, array( 'Create', 'Update', 'Delete' ), true ) ) { return; } if ( is_user_disabled( Users::BLOG_USER_ID ) ) { return; } $transformer = Factory::get_transformer( $wp_object ); if ( \is_wp_error( $transformer ) ) { return; } $user_id = Users::BLOG_USER_ID; $activity = $transformer->to_activity( $type ); $user = Users::get_by_id( Users::BLOG_USER_ID ); $announce = new Activity(); $announce->set_type( 'Announce' ); $announce->set_object( $activity ); $announce->set_actor( $user->get_id() ); self::send_activity_to_followers( $announce, $user_id, $wp_object ); } /** * Send a "Update" Activity when a user updates their profile. * * @param int $user_id The user ID to send an update for. */ public static function send_profile_update( $user_id ) { $user = Users::get_by_various( $user_id ); // Bail if that's not a good user. if ( is_wp_error( $user ) ) { return; } // Build the update. $activity = new Activity(); $activity->set_type( 'Update' ); $activity->set_actor( $user->get_url() ); $activity->set_object( $user->get_url() ); $activity->set_to( 'https://www.w3.org/ns/activitystreams#Public' ); // Send the update. self::send_activity_to_followers( $activity, $user_id, $user ); } /** * Send an Activity to all followers and mentioned users. * * @param Activity $activity The ActivityPub Activity. * @param int $user_id The user ID. * @param \WP_User|WP_Post|WP_Comment $wp_object The WordPress object. */ private static function send_activity_to_followers( $activity, $user_id, $wp_object ) { /** * Filter to prevent sending an Activity to followers. * * @param bool $send_activity_to_followers Whether to send the Activity to followers. * @param Activity $activity The ActivityPub Activity. * @param int $user_id The user ID. * @param \WP_User|WP_Post|WP_Comment $wp_object The WordPress object. */ if ( ! apply_filters( 'activitypub_send_activity_to_followers', true, $activity, $user_id, $wp_object ) ) { return; } /** * Filter to modify the Activity before sending it to followers. * * @param Activity $activity The ActivityPub Activity. * @param int $user_id The user ID. * @param \WP_User|WP_Post|WP_Comment $wp_object The WordPress object. */ $inboxes = apply_filters( 'activitypub_send_to_inboxes', array(), $user_id, $activity ); $inboxes = array_unique( $inboxes ); if ( empty( $inboxes ) ) { return; } $json = $activity->to_json(); foreach ( $inboxes as $inbox ) { safe_remote_post( $inbox, $json, $user_id ); } set_wp_object_state( $wp_object, 'federated' ); } /** * Send a "Create" or "Update" Activity for a WordPress Post. * * @param int $id The WordPress Post ID. * @param string $type The Activity-Type. */ public static function send_post( $id, $type ) { $post = get_post( $id ); if ( ! $post ) { return; } /** * Action to send an Activity for a Post. * * @param WP_Post $post The WordPress Post. * @param string $type The Activity-Type. */ do_action( 'activitypub_send_activity', $post, $type ); /** * Action to send a specific Activity for a Post. * * @param WP_Post $post The WordPress Post. */ do_action( sprintf( 'activitypub_send_%s_activity', \strtolower( $type ) ), $post ); } /** * Send a "Create" or "Update" Activity for a WordPress Comment. * * @param int $id The WordPress Comment ID. * @param string $type The Activity-Type. */ public static function send_comment( $id, $type ) { $comment = get_comment( $id ); if ( ! $comment ) { return; } /** * Action to send an Activity for a Comment. * * @param WP_Comment $comment The WordPress Comment. * @param string $type The Activity-Type. */ do_action( 'activitypub_send_activity', $comment, $type ); /** * Action to send a specific Activity for a Comment. * * @param WP_Comment $comment The WordPress Comment. */ do_action( sprintf( 'activitypub_send_%s_activity', \strtolower( $type ) ), $comment ); } /** * Default filter to add Inboxes of Followers. * * @param array $inboxes The list of Inboxes. * @param int $user_id The WordPress User-ID. * * @return array The filtered Inboxes */ public static function add_inboxes_of_follower( $inboxes, $user_id ) { $follower_inboxes = Followers::get_inboxes( $user_id ); return array_merge( $inboxes, $follower_inboxes ); } /** * Default filter to add Inboxes of Mentioned Actors * * @param array $inboxes The list of Inboxes. * @param int $user_id The WordPress User-ID. * @param array $activity The ActivityPub Activity. * * @return array The filtered Inboxes. */ public static function add_inboxes_by_mentioned_actors( $inboxes, $user_id, $activity ) { $cc = $activity->get_cc(); if ( $cc ) { $mentioned_inboxes = Mention::get_inboxes( $cc ); return array_merge( $inboxes, $mentioned_inboxes ); } return $inboxes; } /** * Default filter to add Inboxes of Posts that are set as `in-reply-to` * * @param array $inboxes The list of Inboxes. * @param int $user_id The WordPress User-ID. * @param array $activity The ActivityPub Activity. * * @return array The filtered Inboxes */ public static function add_inboxes_of_replied_urls( $inboxes, $user_id, $activity ) { $in_reply_to = $activity->get_in_reply_to(); if ( ! $in_reply_to ) { return $inboxes; } if ( ! is_array( $in_reply_to ) ) { $in_reply_to = array( $in_reply_to ); } foreach ( $in_reply_to as $url ) { $object = Http::get_remote_object( $url ); if ( ! $object || \is_wp_error( $object ) || empty( $object['attributedTo'] ) ) { continue; } $actor = object_to_uri( $object['attributedTo'] ); $actor = Http::get_remote_object( $actor ); if ( ! $actor || \is_wp_error( $actor ) ) { continue; } if ( ! empty( $actor['endpoints']['sharedInbox'] ) ) { $inboxes[] = $actor['endpoints']['sharedInbox']; } elseif ( ! empty( $actor['inbox'] ) ) { $inboxes[] = $actor['inbox']; } } return $inboxes; } }