wordpress-activitypub/includes/class-activity-dispatcher.php
2023-03-10 15:46:21 -07:00

337 lines
12 KiB
PHP

<?php
namespace Activitypub;
/**
* ActivityPub Activity_Dispatcher Class
*
* @author Matthias Pfefferle
*
* @see https://www.w3.org/TR/activitypub/
*/
class Activity_Dispatcher {
/**
* Initialize the class, registering WordPress hooks.
*/
public static function init() {
\add_action( 'activitypub_send_post_activity', array( '\Activitypub\Activity_Dispatcher', 'send_post_activity' ) );
\add_action( 'activitypub_send_announce_activity', array( '\Activitypub\Activity_Dispatcher', 'send_announce_activity' ), 10, 2 );
\add_action( 'activitypub_send_update_activity', array( '\Activitypub\Activity_Dispatcher', 'send_update_activity' ) );
\add_action( 'activitypub_send_delete_activity', array( '\Activitypub\Activity_Dispatcher', 'send_delete_activity' ) );
\add_action( 'activitypub_send_delete_url_activity', array( '\Activitypub\Activity_Dispatcher', 'send_delete_url_activity' ), 10, 2 );
\add_action( 'activitypub_send_comment_activity', array( '\Activitypub\Activity_Dispatcher', 'send_comment_activity' ) );
\add_action( 'activitypub_send_update_comment_activity', array( '\Activitypub\Activity_Dispatcher', 'send_update_comment_activity' ) );
\add_action( 'activitypub_inbox_forward_activity', array( '\Activitypub\Activity_Dispatcher', 'inbox_forward_activity' ) );
\add_action( 'activitypub_send_delete_comment_activity', array( '\Activitypub\Activity_Dispatcher', 'send_delete_comment_activity' ) );
}
/**
* Send "create" activities.
*
* @param \Activitypub\Model\Post $activitypub_post
*/
public static function send_post_activity( Model\Post $activitypub_post ) {
// get latest version of post
$user_id = $activitypub_post->get_post_author();
$activitypub_activity = new \Activitypub\Model\Activity( 'Create', \Activitypub\Model\Activity::TYPE_FULL );
$activitypub_activity->from_post( $activitypub_post );
$inboxes = \Activitypub\get_follower_inboxes( $user_id );
$followers_url = \get_rest_url( null, '/activitypub/1.0/users/' . intval( $user_id ) . '/followers' );
foreach ( $activitypub_activity->get_cc() as $cc ) {
if ( $cc === $followers_url ) {
continue;
}
$inbox = \Activitypub\get_inbox_by_actor( $cc );
if ( ! $inbox || \is_wp_error( $inbox ) ) {
continue;
}
// init array if empty
if ( ! isset( $inboxes[ $inbox ] ) ) {
$inboxes[ $inbox ] = array();
}
$inboxes[ $inbox ][] = $cc;
}
foreach ( $inboxes as $inbox => $to ) {
$to = array_values( array_unique( $to ) );
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json();
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "announce" activities.
*
* @param str $activitypub_url (ActivityPub object ID)
* @param absint $user_id
*/
public static function send_announce_activity( $activitypub_url, $user_id ) {
// get latest version of post
$time = \current_datetime()->format( DATE_ISO8601 );
$post = \get_post( \url_to_postid( $activitypub_url ) );
$activitypub_announce = new \Activitypub\Model\Activity( 'Announce', \Activitypub\Model\Activity::TYPE_SIMPLE );
$activitypub_announce->set_published( $time );
if ( $post ) {
$activitypub_id = $post->guid;
$activitypub_post = new \Activitypub\Model\Post( $post );
$activitypub_announce->from_post( $activitypub_post->to_array() );
} else {
$activitypub_id = $activitypub_url;
$activitypub_announce->set_object( $activitypub_id );
}
$activitypub_announce->set_id( add_query_arg( 'activity', 'announce', $activitypub_id ) );
$activitypub_announce->set_actor( \get_author_posts_url( $user_id ) );
foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
$activitypub_announce->set_to( $to );
$activity = $activitypub_announce->to_json(); // phpcs:ignore
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "update" activities.
*
* @param \Activitypub\Model\Post $activitypub_post
*/
public static function send_update_activity( $activitypub_post ) {
// get latest version of post
$user_id = $activitypub_post->get_post_author();
$updated = \wp_date( 'Y-m-d\TH:i:s\Z', \strtotime( $activitypub_post->get_updated() ) );
$activitypub_activity = new \Activitypub\Model\Activity( 'Update', \Activitypub\Model\Activity::TYPE_FULL );
$activitypub_activity->from_post( $activitypub_post );
foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json(); // phpcs:ignore
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "delete" activities.
*
* @param \Activitypub\Model\Post $activitypub_post
*/
public static function send_delete_activity( $activitypub_post ) {
// get latest version of post
$user_id = $activitypub_post->get_post_author();
$activitypub_activity = new \Activitypub\Model\Activity( 'Delete', \Activitypub\Model\Activity::TYPE_FULL );
$activitypub_activity->from_post( $activitypub_post );
foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json(); // phpcs:ignore
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "delete" activities.
*
* @param str $activitypub_url
* @param int $user_id
*/
public static function send_delete_url_activity( $activitypub_url, $user_id ) {
// get latest version of post
$actor = \get_author_posts_url( $user_id );
$deleted = \current_time( 'Y-m-d\TH:i:s\Z', true );
$activitypub_activity = new \Activitypub\Model\Activity( 'Delete', \Activitypub\Model\Activity::TYPE_SIMPLE );
$activitypub_activity->set_id( $activitypub_url . '#delete' );
$activitypub_activity->set_actor( $actor );
$activitypub_activity->set_object(
array(
'id' => $activitypub_url,
'type' => 'Tombstone',
)
);
$activitypub_activity->set_deleted( $deleted );
foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $to ) {
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json(); // phpcs:ignore
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "create" activities for comments
*
* @param \Activitypub\Model\Comment $activitypub_comment
*/
public static function send_comment_activity( $activitypub_comment_id ) {
//ONLY FOR LOCAL USERS ?
$activitypub_comment = \get_comment( $activitypub_comment_id );
$user_id = $activitypub_comment->user_id;
$activitypub_comment = new \Activitypub\Model\Comment( $activitypub_comment );
$activitypub_activity = new \Activitypub\Model\Activity( 'Create', \Activitypub\Model\Activity::TYPE_FULL );
$activitypub_activity->from_comment( $activitypub_comment->to_array() );
$inboxes = \Activitypub\get_follower_inboxes( $user_id );
$followers_url = \get_rest_url( null, '/activitypub/1.0/users/' . intval( $user_id ) . '/followers' );
foreach ( $activitypub_activity->get_cc() as $cc ) {
if ( $cc === $followers_url ) {
continue;
}
$inbox = \Activitypub\get_inbox_by_actor( $cc );
if ( ! $inbox || \is_wp_error( $inbox ) ) {
continue;
}
// init array if empty
if ( ! isset( $inboxes[ $inbox ] ) ) {
$inboxes[ $inbox ] = array();
}
$inboxes[ $inbox ][] = $cc;
}
foreach ( $inboxes as $inbox => $to ) {
$to = array_values( array_unique( $to ) );
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json();
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Forward replies to followers
*
* @param \Activitypub\Model\Comment $activitypub_comment
*/
public static function inbox_forward_activity( $activitypub_comment_id ) {
$activitypub_comment = \get_comment( $activitypub_comment_id );
//original author should NOT recieve a copy of their own post
$replyto[] = $activitypub_comment->comment_author_url;
$activitypub_activity = \unserialize( get_comment_meta( $activitypub_comment->comment_ID, 'ap_object', true ) );
//will be forwarded to the parent_comment->author or post_author followers collection
$parent_comment = \get_comment( $activitypub_comment->comment_parent );
if ( ! is_null( $parent_comment ) ) {
$user_id = $parent_comment->user_id;
} else {
$original_post = \get_post( $activitypub_comment->comment_post_ID );
$user_id = $original_post->post_author;
}
unset( $activitypub_activity['user_id'] ); // remove user_id from $activitypub_comment
foreach ( \Activitypub\get_follower_inboxes( $user_id ) as $inbox => $cc ) {
//Forward reply to followers, skip sender
if ( in_array( $cc, $replyto ) ) {
continue;
}
$activitypub_activity['object']['cc'] = $cc;
$activitypub_activity['cc'] = $cc;
$activity = \wp_json_encode( $activitypub_activity, JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_QUOT );
\Activitypub\forward_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "update" activities.
*
* @param \Activitypub\Model\Comment $activitypub_comment
*/
public static function send_update_comment_activity( $activitypub_comment_id ) {
$activitypub_comment = \get_comment( $activitypub_comment_id );
$updated = \get_comment_meta( $activitypub_comment_id, 'ap_last_modified', true );
$user_id = $activitypub_comment->user_id;
if ( ! $user_id ) { // Prevent sending received/anonymous comments.
return;
}
$activitypub_comment = new \Activitypub\Model\Comment( $activitypub_comment );
$activitypub_comment->set_update( $updated );
$activitypub_activity = new \Activitypub\Model\Activity( 'Update', \Activitypub\Model\Activity::TYPE_FULL );
$activitypub_activity->from_comment( $activitypub_comment->to_array() );
$activitypub_activity->set_update( $updated );
$inboxes = \Activitypub\get_follower_inboxes( $user_id );
$followers_url = \get_rest_url( null, '/activitypub/1.0/users/' . intval( $user_id ) . '/followers' );
foreach ( $activitypub_activity->get_cc() as $cc ) {
if ( $cc === $followers_url ) {
continue;
}
$inbox = \Activitypub\get_inbox_by_actor( $cc );
if ( ! $inbox || \is_wp_error( $inbox ) ) {
continue;
}
// init array if empty
if ( ! isset( $inboxes[ $inbox ] ) ) {
$inboxes[ $inbox ] = array();
}
$inboxes[ $inbox ][] = $cc;
}
foreach ( $inboxes as $inbox => $to ) {
$to = array_values( array_unique( $to ) );
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json();
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
/**
* Send "delete" activities.
*
* @param \Activitypub\Model\Comment $activitypub_comment
*/
public static function send_delete_comment_activity( $activitypub_comment_id ) {
// get comment
$activitypub_comment = \get_comment( $activitypub_comment_id );
$user_id = $activitypub_comment->user_id;
// Prevent sending received/anonymous comments
if ( ! $user_id ) {
return;
}
$deleted = \wp_date( 'Y-m-d\TH:i:s\Z', \strtotime( $activitypub_comment->comment_date_gmt ) );
$activitypub_comment = new \Activitypub\Model\Comment( $activitypub_comment );
$activitypub_comment->set_deleted( $deleted );
$activitypub_activity = new \Activitypub\Model\Activity( 'Delete', \Activitypub\Model\Activity::TYPE_FULL );
$activitypub_activity->from_comment( $activitypub_comment->to_array() );
$activitypub_activity->set_deleted( $deleted );
$inboxes = \Activitypub\get_follower_inboxes( $user_id );
$followers_url = \get_rest_url( null, '/activitypub/1.0/users/' . intval( $user_id ) . '/followers' );
foreach ( $activitypub_activity->get_cc() as $cc ) {
if ( $cc === $followers_url ) {
continue;
}
$inbox = \Activitypub\get_inbox_by_actor( $cc );
if ( ! $inbox || \is_wp_error( $inbox ) ) {
continue;
}
// init array if empty
if ( ! isset( $inboxes[ $inbox ] ) ) {
$inboxes[ $inbox ] = array();
}
$inboxes[ $inbox ][] = $cc;
}
foreach ( $inboxes as $inbox => $to ) {
$to = array_values( array_unique( $to ) );
$activitypub_activity->set_to( $to );
$activity = $activitypub_activity->to_json();
\Activitypub\safe_remote_post( $inbox, $activity, $user_id );
}
}
}