-
Notifications
You must be signed in to change notification settings - Fork 70
/
class-activity-dispatcher.php
315 lines (264 loc) · 8.19 KB
/
class-activity-dispatcher.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
<?php
namespace Activitypub;
use WP_Post;
use WP_Comment;
use Activitypub\Http;
use Activitypub\Collection\Users;
use Activitypub\Activity\Activity;
use Activitypub\Collection\Followers;
use Activitypub\Transformer\Factory;
use Activitypub\Transformer\Post;
use Activitypub\Transformer\Comment;
use function Activitypub\object_to_uri;
use function Activitypub\is_single_user;
use function Activitypub\is_user_disabled;
use function Activitypub\safe_remote_post;
use function Activitypub\set_wp_object_state;
/**
* 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', array( self::class, 'send_post' ), 10, 2 );
\add_action( 'activitypub_send_comment', array( self::class, 'send_comment' ), 10, 2 );
\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 );
\add_action( 'activitypub_send_update_profile_activity', array( self::class, 'send_profile_update' ), 10, 1 );
// Default filters to add Inboxes to sent to
\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'add_inboxes_of_follower' ), 10, 2 );
\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'add_inboxes_by_mentioned_actors' ), 10, 3 );
\add_filter( 'activitypub_send_to_inboxes', array( self::class, 'add_inboxes_of_replied_urls' ), 10, 3 );
}
/**
* Send Activities to followers and mentioned users or `Announce` (boost) a blog post.
*
* @param mixed $wp_object The ActivityPub Post.
* @param string $type The Activity-Type.
*
* @return void
*/
public static function send_activity_or_announce( $wp_object, $type ) {
if ( is_user_type_disabled( 'blog' ) ) {
return;
}
if ( is_single_user() ) {
self::send_activity( $wp_object, $type, Users::BLOG_USER_ID );
} else {
self::send_announce( $wp_object, $type );
}
}
/**
* Send Activities to followers and mentioned users.
*
* @param mixed $wp_object The ActivityPub Post.
* @param string $type The Activity-Type.
*
* @return void
*/
public static function send_activity( $wp_object, $type, $user_id = null ) {
$transformer = Factory::get_transformer( $wp_object ); // Could potentially return a `\WP_Error` instance.
if ( \is_wp_error( $transformer ) ) {
return;
}
if ( null !== $user_id ) {
$transformer->change_wp_user_id( $user_id );
}
$user_id = $transformer->get_wp_user_id();
if ( is_user_disabled( $user_id ) ) {
return;
}
$activity = $transformer->to_activity( $type );
self::send_activity_to_followers( $activity, $user_id, $wp_object );
}
/**
* Send Announces to followers and mentioned users.
*
* @param mixed $wp_object The ActivityPub Post.
* @param string $type The Activity-Type.
*
* @return void
*/
public static function send_announce( $wp_object, $type ) {
if ( ! in_array( $type, array( 'Create', 'Update', 'Delete' ), true ) ) {
return;
}
if ( is_user_disabled( Users::BLOG_USER_ID ) ) {
return;
}
$transformer = Factory::get_transformer( $wp_object );
if ( \is_wp_error( $transformer ) ) {
return;
}
$user_id = Users::BLOG_USER_ID;
$activity = $transformer->to_activity( $type );
$user = Users::get_by_id( Users::BLOG_USER_ID );
$announce = new Activity();
$announce->set_type( 'Announce' );
$announce->set_object( $activity );
$announce->set_actor( $user->get_id() );
self::send_activity_to_followers( $announce, $user_id, $wp_object );
}
/**
* Send a "Update" Activity when a user updates their profile.
*
* @param int $user_id The user ID to send an update for.
*
* @return void
*/
public static function send_profile_update( $user_id ) {
$user = Users::get_by_various( $user_id );
// bail if that's not a good user
if ( is_wp_error( $user ) ) {
return;
}
// build the update
$activity = new Activity();
$activity->set_id( $user->get_url() . '#update' );
$activity->set_type( 'Update' );
$activity->set_actor( $user->get_url() );
$activity->set_object( $user->get_url() );
$activity->set_to( 'https://www.w3.org/ns/activitystreams#Public' );
// send the update
self::send_activity_to_followers( $activity, $user_id, $user );
}
/**
* Send an Activity to all followers and mentioned users.
*
* @param Activity $activity The ActivityPub Activity.
* @param int $user_id The user ID.
* @param WP_User|WP_Post|WP_Comment $wp_object The WordPress object.
*
* @return void
*/
private static function send_activity_to_followers( $activity, $user_id, $wp_object ) {
// check if the Activity should be send to the followers
if ( ! apply_filters( 'activitypub_send_activity_to_followers', true, $activity, $user_id, $wp_object ) ) {
return;
}
$inboxes = apply_filters( 'activitypub_send_to_inboxes', array(), $user_id, $activity );
$inboxes = array_unique( $inboxes );
if ( empty( $inboxes ) ) {
return;
}
$json = $activity->to_json();
foreach ( $inboxes as $inbox ) {
safe_remote_post( $inbox, $json, $user_id );
}
set_wp_object_state( $wp_object, 'federated' );
}
/**
* Send a "Create" or "Update" Activity for a WordPress Post.
*
* @param int $id The WordPress Post ID.
* @param string $type The Activity-Type.
*
* @return void
*/
public static function send_post( $id, $type ) {
$post = get_post( $id );
if ( ! $post ) {
return;
}
do_action( 'activitypub_send_activity', $post, $type );
do_action(
sprintf(
'activitypub_send_%s_activity',
\strtolower( $type )
),
$post
);
}
/**
* Send a "Create" or "Update" Activity for a WordPress Comment.
*
* @param int $id The WordPress Comment ID.
* @param string $type The Activity-Type.
*
* @return void
*/
public static function send_comment( $id, $type ) {
$comment = get_comment( $id );
if ( ! $comment ) {
return;
}
do_action( 'activitypub_send_activity', $comment, $type );
do_action(
sprintf(
'activitypub_send_%s_activity',
\strtolower( $type )
),
$comment
);
}
/**
* Default filter to add Inboxes of Followers
*
* @param array $inboxes The list of Inboxes
* @param int $user_id The WordPress User-ID
*
* @return array The filtered Inboxes
*/
public static function add_inboxes_of_follower( $inboxes, $user_id ) {
$follower_inboxes = Followers::get_inboxes( $user_id );
return array_merge( $inboxes, $follower_inboxes );
}
/**
* Default filter to add Inboxes of Mentioned Actors
*
* @param array $inboxes The list of Inboxes
* @param int $user_id The WordPress User-ID
* @param array $activity The ActivityPub Activity
*
* @return array The filtered Inboxes
*/
public static function add_inboxes_by_mentioned_actors( $inboxes, $user_id, $activity ) {
$cc = $activity->get_cc();
if ( $cc ) {
$mentioned_inboxes = Mention::get_inboxes( $cc );
return array_merge( $inboxes, $mentioned_inboxes );
}
return $inboxes;
}
/**
* Default filter to add Inboxes of Posts that are set as `in-reply-to`
*
* @param array $inboxes The list of Inboxes
* @param int $user_id The WordPress User-ID
* @param array $activity The ActivityPub Activity
*
* @return array The filtered Inboxes
*/
public static function add_inboxes_of_replied_urls( $inboxes, $user_id, $activity ) {
$in_reply_to = $activity->get_in_reply_to();
if ( ! $in_reply_to ) {
return $inboxes;
}
if ( ! is_array( $in_reply_to ) ) {
$in_reply_to = array( $in_reply_to );
}
foreach ( $in_reply_to as $url ) {
$object = Http::get_remote_object( $url );
if ( ! $object || empty( $object['attributedTo'] ) ) {
continue;
}
$actor = object_to_uri( $object['attributedTo'] );
$actor = Http::get_remote_object( $actor );
if ( ! $actor ) {
continue;
}
if ( ! empty( $actor['endpoints']['sharedInbox'] ) ) {
$inboxes[] = $actor['endpoints']['sharedInbox'];
} elseif ( ! empty( $actor['inbox'] ) ) {
$inboxes[] = $actor['inbox'];
}
}
return $inboxes;
}
}