| 1 |
<?php |
| 2 |
/** |
| 3 |
* Follow handler file. |
| 4 |
* |
| 5 |
* @package Activitypub |
| 6 |
*/ |
| 7 |
|
| 8 |
namespace Activitypub\Handler; |
| 9 |
|
| 10 |
use Activitypub\Notification; |
| 11 |
use Activitypub\Activity\Activity; |
| 12 |
use Activitypub\Collection\Actors; |
| 13 |
use Activitypub\Collection\Followers; |
| 14 |
|
| 15 |
use function Activitypub\add_to_outbox; |
| 16 |
|
| 17 |
/** |
| 18 |
* Handle Follow requests. |
| 19 |
*/ |
| 20 |
class Follow { |
| 21 |
/** |
| 22 |
* Initialize the class, registering WordPress hooks. |
| 23 |
*/ |
| 24 |
public static function init() { |
| 25 |
\add_action( |
| 26 |
'activitypub_inbox_follow', |
| 27 |
array( self::class, 'handle_follow' ) |
| 28 |
); |
| 29 |
|
| 30 |
\add_action( |
| 31 |
'activitypub_followers_post_follow', |
| 32 |
array( self::class, 'queue_accept' ), |
| 33 |
10, |
| 34 |
4 |
| 35 |
); |
| 36 |
} |
| 37 |
|
| 38 |
/** |
| 39 |
* Handle "Follow" requests. |
| 40 |
* |
| 41 |
* @param array $activity The activity object. |
| 42 |
*/ |
| 43 |
public static function handle_follow( $activity ) { |
| 44 |
$user = Actors::get_by_resource( $activity['object'] ); |
| 45 |
|
| 46 |
if ( ! $user || is_wp_error( $user ) ) { |
| 47 |
// If we can not find a user, we can not initiate a follow process. |
| 48 |
return; |
| 49 |
} |
| 50 |
|
| 51 |
$user_id = $user->get__id(); |
| 52 |
|
| 53 |
// Save follower. |
| 54 |
$follower = Followers::add_follower( |
| 55 |
$user_id, |
| 56 |
$activity['actor'] |
| 57 |
); |
| 58 |
|
| 59 |
/** |
| 60 |
* Fires after a new follower has been added. |
| 61 |
* |
| 62 |
* @param string $actor The URL of the actor (follower) who initiated the follow. |
| 63 |
* @param array $activity The complete activity data of the follow request. |
| 64 |
* @param int $user_id The ID of the WordPress user being followed. |
| 65 |
* @param \Activitypub\Model\Follower|\WP_Error $follower The Follower object containing the new follower's data. |
| 66 |
*/ |
| 67 |
do_action( 'activitypub_followers_post_follow', $activity['actor'], $activity, $user_id, $follower ); |
| 68 |
|
| 69 |
// Send notification. |
| 70 |
$notification = new Notification( |
| 71 |
'follow', |
| 72 |
$activity['actor'], |
| 73 |
$activity, |
| 74 |
$user_id |
| 75 |
); |
| 76 |
$notification->send(); |
| 77 |
} |
| 78 |
|
| 79 |
/** |
| 80 |
* Send Accept response. |
| 81 |
* |
| 82 |
* @param string $actor The Actor URL. |
| 83 |
* @param array $activity_object The Activity object. |
| 84 |
* @param int $user_id The ID of the WordPress User. |
| 85 |
* @param \Activitypub\Model\Follower|\WP_Error $follower The Follower object. |
| 86 |
*/ |
| 87 |
public static function queue_accept( $actor, $activity_object, $user_id, $follower ) { |
| 88 |
if ( \is_wp_error( $follower ) ) { |
| 89 |
// Impossible to send a "Reject" because we can not get the Remote-Inbox. |
| 90 |
return; |
| 91 |
} |
| 92 |
|
| 93 |
// Only send minimal data. |
| 94 |
$activity_object = array_intersect_key( |
| 95 |
$activity_object, |
| 96 |
array_flip( |
| 97 |
array( |
| 98 |
'id', |
| 99 |
'type', |
| 100 |
'actor', |
| 101 |
'object', |
| 102 |
) |
| 103 |
) |
| 104 |
); |
| 105 |
|
| 106 |
$activity = new Activity(); |
| 107 |
$activity->set_type( 'Accept' ); |
| 108 |
$activity->set_actor( Actors::get_by_id( $user_id )->get_id() ); |
| 109 |
$activity->set_object( $activity_object ); |
| 110 |
$activity->set_to( array( $actor ) ); |
| 111 |
|
| 112 |
add_to_outbox( $activity, null, $user_id, ACTIVITYPUB_CONTENT_VISIBILITY_PRIVATE ); |
| 113 |
} |
| 114 |
} |
| 115 |
|
