270 lines
10 KiB
PHP
270 lines
10 KiB
PHP
<?php
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namespace Activitypub;
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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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* Initialize the class, registering WordPress hooks.
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*/
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public static function init() {
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\add_action( 'activitypub_send_post_activity', array( '\Activitypub\Activity_Dispatcher', 'send_post_activity' ) );
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\add_action( 'activitypub_send_announce_activity', array( '\Activitypub\Activity_Dispatcher', 'send_announce_activity' ), 10, 2 );
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\add_action( 'activitypub_send_update_activity', array( '\Activitypub\Activity_Dispatcher', 'send_update_activity' ) );
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\add_action( 'activitypub_send_delete_activity', array( '\Activitypub\Activity_Dispatcher', 'send_delete_activity' ) );
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\add_action( 'activitypub_send_delete_url_activity', array( '\Activitypub\Activity_Dispatcher', 'send_delete_url_activity' ), 10, 2 );
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\add_action( 'activitypub_send_comment_activity', array( '\Activitypub\Activity_Dispatcher', 'send_comment_activity' ) );
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\add_action( 'activitypub_send_update_comment_activity', array( '\Activitypub\Activity_Dispatcher', 'send_update_comment_activity' ) );
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\add_action( 'activitypub_inbox_forward_activity', array( '\Activitypub\Activity_Dispatcher', 'inbox_forward_activity' ) );
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\add_action( 'activitypub_send_delete_comment_activity', array( '\Activitypub\Activity_Dispatcher', 'send_delete_comment_activity' ) );
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}
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/**
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* Send "create" activities.
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*
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* @param \Activitypub\Model\Post $activitypub_post
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*/
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public static function send_post_activity( Model\Post $activitypub_post ) {
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// get latest version of post
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$user_id = $activitypub_post->get_post_author();
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$activitypub_activity = new \Activitypub\Model\Activity( 'Create', \Activitypub\Model\Activity::TYPE_FULL );
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$activitypub_activity->from_post( $activitypub_post );
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$inboxes = \Activitypub\get_follower_inboxes( $user_id );
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$followers_url = \get_rest_url( null, '/activitypub/1.0/users/' . intval( $user_id ) . '/followers' );
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foreach ( $activitypub_activity->get_cc() as $cc ) {
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if ( $cc === $followers_url ) {
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continue;
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}
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$inbox = \Activitypub\get_inbox_by_actor( $cc );
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if ( ! $inbox || \is_wp_error( $inbox ) ) {
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continue;
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}
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// init array if empty
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if ( ! isset( $inboxes[ $inbox ] ) ) {
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$inboxes[ $inbox ] = array();
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}
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$inboxes[ $inbox ][] = $cc;
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}
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foreach ( $inboxes as $inbox => $to ) {
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$to = array_values( array_unique( $to ) );
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$activitypub_activity->set_to( $to );
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$activity = $activitypub_activity->to_json();
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Send "announce" activities.
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*
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* @param str $activitypub_url (ActivityPub object ID)
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* @param absint $user_id
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*/
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public static function send_announce_activity( $activitypub_url, $user_id ) {
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// get latest version of post
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$time = \current_datetime()->format( DATE_ISO8601 );
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$post = \get_post( \url_to_postid( $activitypub_url ) );
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$activitypub_announce = new \Activitypub\Model\Activity( 'Announce', \Activitypub\Model\Activity::TYPE_SIMPLE );
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$activitypub_announce->set_published( $time );
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if ( $post ) {
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$activitypub_id = $post->guid;
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$activitypub_post = new \Activitypub\Model\Post( $post );
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$activitypub_announce->from_post( $activitypub_post->to_array() );
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} else {
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$activitypub_id = $activitypub_url;
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$activitypub_announce->set_object( $activitypub_id );
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}
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$activitypub_announce->set_id( add_query_arg( 'activity', 'announce', $activitypub_id ) );
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$activitypub_announce->set_actor( \get_author_posts_url( $user_id ) );
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
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$activitypub_announce->set_to( $to );
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$activity = $activitypub_announce->to_json(); // phpcs:ignore
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Send "update" activities.
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*
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* @param \Activitypub\Model\Post $activitypub_post
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*/
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public static function send_update_activity( $activitypub_post ) {
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// get latest version of post
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$user_id = $activitypub_post->get_post_author();
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$updated = \wp_date( 'Y-m-d\TH:i:s\Z', \strtotime( $activitypub_post->get_updated() ) );
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$activitypub_activity = new \Activitypub\Model\Activity( 'Update', \Activitypub\Model\Activity::TYPE_FULL );
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$activitypub_activity->from_post( $activitypub_post );
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
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$activitypub_activity->set_to( $to );
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$activity = $activitypub_activity->to_json(); // phpcs:ignore
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Send "delete" activities.
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*
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* @param \Activitypub\Model\Post $activitypub_post
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*/
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public static function send_delete_activity( $activitypub_post ) {
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// get latest version of post
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$user_id = $activitypub_post->get_post_author();
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$activitypub_activity = new \Activitypub\Model\Activity( 'Delete', \Activitypub\Model\Activity::TYPE_FULL );
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$activitypub_activity->from_post( $activitypub_post );
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
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$activitypub_activity->set_to( $to );
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$activity = $activitypub_activity->to_json(); // phpcs:ignore
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Send "delete" activities.
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*
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* @param str $activitypub_url
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* @param int $user_id
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*/
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public static function send_delete_url_activity( $activitypub_url, $user_id ) {
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// get latest version of post
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$actor = \get_author_posts_url( $user_id );
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$deleted = \current_time( 'Y-m-d\TH:i:s\Z', true );
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$activitypub_activity = new \Activitypub\Model\Activity( 'Delete', \Activitypub\Model\Activity::TYPE_SIMPLE );
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$activitypub_activity->set_id( $activitypub_url . '#delete' );
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$activitypub_activity->set_actor( $actor );
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$activitypub_activity->set_object(
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array(
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'id' => $activitypub_url,
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'type' => 'Tombstone',
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)
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);
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$activitypub_activity->set_deleted( $deleted );
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
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$activitypub_activity->set_to( $to );
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$activity = $activitypub_activity->to_json(); // phpcs:ignore
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Send "create" activities for comments
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*
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* @param \Activitypub\Model\Comment $activitypub_comment
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*/
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public static function send_comment_activity( $activitypub_comment_id ) {
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//ONLY FOR LOCAL USERS ?
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$activitypub_comment = \get_comment( $activitypub_comment_id );
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$user_id = $activitypub_comment->user_id;
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$mentions[] = \get_comment_meta( $activitypub_comment_id, 'mentions', true );// mention[href, name]
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$activitypub_comment = new \Activitypub\Model\Comment( $activitypub_comment );
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$activitypub_activity = new \Activitypub\Model\Activity( 'Create', \Activitypub\Model\Activity::TYPE_FULL );
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$activitypub_activity->from_comment( $activitypub_comment->to_array() );
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$mentioned_actors = array();
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foreach ( \Activitypub\get_mentioned_inboxes( $mentions ) as $inbox => $to ) {
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$activitypub_activity->set_to( $to );//all users at shared inbox
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$activity = $activitypub_activity->to_json(); // phpcs:ignore
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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$mentioned_actors[] = $to;
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}
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $cc ) {
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$activitypub_activity->set_cc( $cc );//set_cc
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$activity = $activitypub_activity->to_json(); // phpcs:ignore
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// Send reply to followers, skip if mentioned followers (avoid duplicate replies)
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if ( in_array( $cc, $mentioned_actors ) ) {
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continue;
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}
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Forward replies to followers
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*
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* @param \Activitypub\Model\Comment $activitypub_comment
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*/
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public static function inbox_forward_activity( $activitypub_comment_id ) {
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$activitypub_comment = \get_comment( $activitypub_comment_id );
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//original author should NOT recieve a copy of their own post
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$replyto[] = $activitypub_comment->comment_author_url;
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$activitypub_activity = \unserialize( get_comment_meta( $activitypub_comment->comment_ID, 'ap_object', true ) );
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//will be forwarded to the parent_comment->author or post_author followers collection
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$parent_comment = \get_comment( $activitypub_comment->comment_parent );
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if ( ! is_null( $parent_comment ) ) {
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$user_id = $parent_comment->user_id;
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} else {
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$original_post = \get_post( $activitypub_comment->comment_post_ID );
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$user_id = $original_post->post_author;
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}
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unset( $activitypub_activity['user_id'] ); // remove user_id from $activitypub_comment
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $cc ) {
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//Forward reply to followers, skip sender
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if ( in_array( $cc, $replyto ) ) {
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continue;
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}
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$activitypub_activity['object']['cc'] = $cc;
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$activitypub_activity['cc'] = $cc;
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$activity = \wp_json_encode( $activitypub_activity, JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_QUOT );
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\Activitypub\forward_remote_post( $inbox, $activity, $user_id );
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}
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}
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/**
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* Send "delete" activities.
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*
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* @param \Activitypub\Model\Comment $activitypub_comment
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*/
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public static function send_delete_comment_activity( $activitypub_comment_id ) {
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// get comment
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$activitypub_comment = \get_comment( $activitypub_comment_id );
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$user_id = $activitypub_comment->user_id;
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// Prevent sending received/anonymous comments
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if ( ! $user_id ) {
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return;
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}
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$deleted = \wp_date( 'Y-m-d\TH:i:s\Z', \strtotime( $activitypub_comment->comment_date_gmt ) );
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$activitypub_comment = new \Activitypub\Model\Comment( $activitypub_comment );
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$activitypub_comment->set_deleted( $deleted );
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$activitypub_activity = new \Activitypub\Model\Activity( 'Delete', \Activitypub\Model\Activity::TYPE_FULL );
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$activitypub_activity->from_comment( $activitypub_comment->to_array() );
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$activitypub_activity->set_deleted( $deleted );
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foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
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$activitypub_activity->set_to( $to );
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$activity = $activitypub_activity->to_json(); // phpcs:ignore
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\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
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}
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}
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}
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