wordpress-activitypub/includes/class-activity-dispatcher.php

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<?php
namespace Activitypub;
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use WP_Post;
use Activitypub\Activity\Activity;
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use Activitypub\Collection\Users;
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use Activitypub\Collection\Followers;
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use Activitypub\Transformer\Post;
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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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/**
* ActivityPub Activity_Dispatcher Class
*
* @author Matthias Pfefferle
*
* @see https://www.w3.org/TR/activitypub/
*/
class Activity_Dispatcher {
/**
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* Initialize the class, registering WordPress hooks.
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*/
public static function init() {
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// check if a migration is needed before sending new posts
Migration::maybe_migrate();
\add_action( 'activitypub_send_activity', array( self::class, 'send_activity' ), 10, 2 );
\add_action( 'activitypub_send_activity', array( self::class, 'send_activity_or_announce' ), 10, 2 );
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}
/**
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* Send Activities to followers and mentioned users.
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*
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* @param WP_Post $wp_post 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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*/
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public static function send_activity( WP_Post $wp_post, $type ) {
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if ( is_user_disabled( $wp_post->post_author ) ) {
return;
}
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$object = Post::transform( $wp_post )->to_object();
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$activity = new Activity();
$activity->set_type( $type );
$activity->set_object( $object );
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$follower_inboxes = Followers::get_inboxes( $wp_post->post_author );
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$mentioned_inboxes = Mention::get_inboxes( $activity->get_cc() );
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$inboxes = array_merge( $follower_inboxes, $mentioned_inboxes );
$inboxes = array_unique( $inboxes );
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$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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}
/**
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* Send Activities to followers and mentioned users or `Announce` (boost) a blog post.
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*
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* @param WP_Post $wp_post 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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public static function send_activity_or_announce( WP_Post $wp_post, $type ) {
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if ( is_user_disabled( Users::BLOG_USER_ID ) ) {
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return;
}
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$wp_post->post_author = Users::BLOG_USER_ID;
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if ( is_single_user() ) {
self::send_user_activity( $wp_post, $type );
} else {
self::send_announce_activity( $wp_post, $type );
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}
}
/**
* Send Activities to followers and mentioned users.
*
* @param WP_Post $wp_post The ActivityPub Post.
* @param string $type The Activity-Type.
*
* @return void
*/
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public static function send_announce( WP_Post $wp_post, $type ) {
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// check if a migration is needed before sending new posts
Migration::maybe_migrate();
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if ( ! in_array( $type, array( 'Create', 'Update' ), true ) ) {
return;
}
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if ( is_user_disabled( Users::BLOG_USER_ID ) ) {
return;
}
$object = Post::transform( $wp_post )->to_object();
$activity = new Activity();
$activity->set_type( 'Announce' );
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// to pre-fill attributes like "published" and "id"
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$activity->set_object( $object );
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// send only the id
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$activity->set_object( $object->get_id() );
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$follower_inboxes = Followers::get_inboxes( $wp_post->post_author );
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$mentioned_inboxes = Mention::get_inboxes( $activity->get_cc() );
$inboxes = array_merge( $follower_inboxes, $mentioned_inboxes );
$inboxes = array_unique( $inboxes );
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$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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}
}
}