laipower/wp-content/plugins/activitypub/includes/handler/class-follow.php

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<?php
/**
* Follow handler file.
*
* @package Activitypub
*/
namespace Activitypub\Handler;
use Activitypub\Http;
use Activitypub\Notification;
use Activitypub\Activity\Activity;
use Activitypub\Collection\Users;
use Activitypub\Collection\Followers;
/**
* Handle Follow requests.
*/
class Follow {
/**
* Initialize the class, registering WordPress hooks.
*/
public static function init() {
\add_action(
'activitypub_inbox_follow',
array( self::class, 'handle_follow' )
);
\add_action(
'activitypub_followers_post_follow',
array( self::class, 'send_follow_response' ),
10,
4
);
}
/**
* Handle "Follow" requests.
*
* @param array $activity The activity object.
*/
public static function handle_follow( $activity ) {
$user = Users::get_by_resource( $activity['object'] );
if ( ! $user || is_wp_error( $user ) ) {
// If we can not find a user, we can not initiate a follow process.
return;
}
$user_id = $user->get__id();
// Save follower.
$follower = Followers::add_follower(
$user_id,
$activity['actor']
);
do_action(
'activitypub_followers_post_follow',
$activity['actor'],
$activity,
$user_id,
$follower
);
// Send notification.
$notification = new Notification(
'follow',
$activity['actor'],
$activity,
$user_id
);
$notification->send();
}
/**
* Send Accept response.
*
* @param string $actor The Actor URL.
* @param array $activity_object The Activity object.
* @param int $user_id The ID of the WordPress User.
* @param \Activitypub\Model\Follower $follower The Follower object.
*/
public static function send_follow_response( $actor, $activity_object, $user_id, $follower ) {
if ( \is_wp_error( $follower ) ) {
// Impossible to send a "Reject" because we can not get the Remote-Inbox.
return;
}
// Only send minimal data.
$activity_object = array_intersect_key(
$activity_object,
array_flip(
array(
'id',
'type',
'actor',
'object',
)
)
);
$user = Users::get_by_id( $user_id );
// Get inbox.
$inbox = $follower->get_shared_inbox();
// Send "Accept" activity.
$activity = new Activity();
$activity->set_type( 'Accept' );
$activity->set_object( $activity_object );
$activity->set_actor( $user->get_id() );
$activity->set_to( $actor );
$activity->set_id( $user->get_id() . '#follow-' . \preg_replace( '~^https?://~', '', $actor ) . '-' . \time() );
$activity = $activity->to_json();
Http::post( $inbox, $activity, $user_id );
}
}