2020-04-07 13:03:04 +00:00
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<?php
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namespace Activitypub;
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2023-10-22 22:20:53 +00:00
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use WP_Post;
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2024-02-08 12:31:25 +00:00
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use WP_Comment;
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2023-10-22 22:20:53 +00:00
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use Activitypub\Activity\Activity;
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use Activitypub\Collection\Users;
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use Activitypub\Collection\Followers;
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2024-02-08 12:31:25 +00:00
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use Activitypub\Transformer\Factory;
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2023-10-22 22:20:53 +00:00
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use Activitypub\Transformer\Post;
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use Activitypub\Transformer\Comment;
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2023-10-22 22:20:53 +00:00
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use function Activitypub\is_single_user;
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use function Activitypub\is_user_disabled;
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use function Activitypub\safe_remote_post;
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2024-03-28 09:39:50 +00:00
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use function Activitypub\set_wp_object_state;
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2023-10-22 22:20:53 +00:00
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2020-04-07 13:03:04 +00:00
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/**
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* ActivityPub Activity_Dispatcher Class
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*
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* @author Matthias Pfefferle
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*
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* @see https://www.w3.org/TR/activitypub/
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*/
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class Activity_Dispatcher {
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/**
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2020-12-25 19:23:08 +00:00
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* Initialize the class, registering WordPress hooks.
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2020-04-07 13:03:04 +00:00
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*/
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public static function init() {
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\add_action( 'activitypub_send_post', array( self::class, 'send_post' ), 10, 2 );
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\add_action( 'activitypub_send_comment', array( self::class, 'send_comment' ), 10, 2 );
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2023-10-22 22:20:53 +00:00
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\add_action( 'activitypub_send_activity', array( self::class, 'send_activity' ), 10, 2 );
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\add_action( 'activitypub_send_activity', array( self::class, 'send_activity_or_announce' ), 10, 2 );
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2024-02-08 12:31:25 +00:00
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\add_action( 'activitypub_send_update_profile_activity', array( self::class, 'send_profile_update' ), 10, 1 );
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2020-04-07 13:03:04 +00:00
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}
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/**
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* Send Activities to followers and mentioned users or `Announce` (boost) a blog post.
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2020-04-07 13:03:04 +00:00
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*
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* @param mixed $wp_object The ActivityPub Post.
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* @param string $type The Activity-Type.
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2023-10-22 22:20:53 +00:00
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*
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* @return void
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2020-04-07 13:03:04 +00:00
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*/
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public static function send_activity_or_announce( $wp_object, $type ) {
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if ( is_user_type_disabled( 'blog' ) ) {
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return;
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2023-03-17 22:33:51 +00:00
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}
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2023-10-22 22:20:53 +00:00
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if ( is_single_user() ) {
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self::send_activity( $wp_object, $type, Users::BLOG_USER_ID );
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} else {
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self::send_announce( $wp_object, $type );
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2020-04-07 13:03:04 +00:00
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}
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}
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/**
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* Send Activities to followers and mentioned users.
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2020-04-07 13:03:04 +00:00
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*
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* @param mixed $wp_object The ActivityPub Post.
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* @param string $type The Activity-Type.
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*
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* @return void
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2020-04-07 13:03:04 +00:00
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*/
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public static function send_activity( $wp_object, $type, $user_id = null ) {
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$transformer = Factory::get_transformer( $wp_object );
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if ( null !== $user_id ) {
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$transformer->change_wp_user_id( $user_id );
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}
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$user_id = $transformer->get_wp_user_id();
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if ( is_user_disabled( $user_id ) ) {
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return;
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}
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$activity = $transformer->to_activity( $type );
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self::send_activity_to_followers( $activity, $user_id, $wp_object );
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2020-04-07 13:03:04 +00:00
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}
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/**
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* Send Announces to followers and mentioned users.
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*
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2024-02-08 12:31:25 +00:00
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* @param mixed $wp_object The ActivityPub Post.
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* @param string $type The Activity-Type.
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2020-04-07 13:03:04 +00:00
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*
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* @return void
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2020-04-07 13:03:04 +00:00
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*/
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public static function send_announce( $wp_object, $type ) {
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if ( ! in_array( $type, array( 'Create', 'Update' ), true ) ) {
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return;
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}
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if ( is_user_disabled( Users::BLOG_USER_ID ) ) {
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return;
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}
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$transformer = Factory::get_transformer( $wp_object );
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$transformer->change_wp_user_id( Users::BLOG_USER_ID );
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$user_id = $transformer->get_wp_user_id();
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$activity = $transformer->to_activity( 'Announce' );
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self::send_activity_to_followers( $activity, $user_id, $wp_object );
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}
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/**
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* Send a "Update" Activity when a user updates their profile.
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*
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* @param int $user_id The user ID to send an update for.
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*
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* @return void
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*/
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public static function send_profile_update( $user_id ) {
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$user = Users::get_by_various( $user_id );
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// bail if that's not a good user
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if ( is_wp_error( $user ) ) {
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return;
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}
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// build the update
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$activity = new Activity();
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$activity->set_id( $user->get_url() . '#update' );
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$activity->set_type( 'Update' );
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$activity->set_actor( $user->get_url() );
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$activity->set_object( $user->get_url() );
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$activity->set_to( 'https://www.w3.org/ns/activitystreams#Public' );
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// send the update
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self::send_activity_to_followers( $activity, $user_id, $user );
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}
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/**
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* Send an Activity to all followers and mentioned users.
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*
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* @param Activity $activity The ActivityPub Activity.
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* @param int $user_id The user ID.
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* @param WP_User|WP_Post|WP_Comment $wp_object The WordPress object.
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*
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* @return void
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*/
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private static function send_activity_to_followers( $activity, $user_id, $wp_object ) {
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// check if the Activity should be send to the followers
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if ( ! apply_filters( 'activitypub_send_activity_to_followers', true, $activity, $user_id, $wp_object ) ) {
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return;
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}
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$follower_inboxes = Followers::get_inboxes( $user_id );
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$mentioned_inboxes = array();
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$cc = $activity->get_cc();
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if ( $cc ) {
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$mentioned_inboxes = Mention::get_inboxes( $cc );
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}
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$inboxes = array_merge( $follower_inboxes, $mentioned_inboxes );
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$inboxes = array_unique( $inboxes );
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if ( empty( $inboxes ) ) {
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return;
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}
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2023-10-22 22:20:53 +00:00
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$json = $activity->to_json();
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foreach ( $inboxes as $inbox ) {
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safe_remote_post( $inbox, $json, $user_id );
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}
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set_wp_object_state( $wp_object, 'federated' );
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}
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/**
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* Send a "Create" or "Update" Activity for a WordPress Post.
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*
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* @param int $id The WordPress Post ID.
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* @param string $type The Activity-Type.
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*
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* @return void
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*/
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public static function send_post( $id, $type ) {
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$post = get_post( $id );
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if ( ! $post ) {
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return;
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}
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do_action( 'activitypub_send_activity', $post, $type );
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do_action(
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sprintf(
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'activitypub_send_%s_activity',
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\strtolower( $type )
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),
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$post
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);
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}
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/**
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* Send a "Create" or "Update" Activity for a WordPress Comment.
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*
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* @param int $id The WordPress Comment ID.
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* @param string $type The Activity-Type.
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*
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* @return void
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*/
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public static function send_comment( $id, $type ) {
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$comment = get_comment( $id );
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if ( ! $comment ) {
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return;
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}
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do_action( 'activitypub_send_activity', $comment, $type );
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do_action(
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sprintf(
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'activitypub_send_%s_activity',
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\strtolower( $type )
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),
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$comment
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);
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2020-04-07 13:03:04 +00:00
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}
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}
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