summaryrefslogtreecommitdiff
path: root/plugins/OStatus/OStatusPlugin.php
blob: 9d5613b200c8847694b1b81eee18411987017b2c (plain)
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
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
<?php
/*
 * StatusNet - the distributed open-source microblogging tool
 * Copyright (C) 2009-2010, StatusNet, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * @package OStatusPlugin
 * @maintainer Brion Vibber <brion@status.net>
 */

if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }

set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/');

class FeedSubException extends Exception
{
}

class OStatusPlugin extends Plugin
{
    /**
     * Hook for RouterInitialized event.
     *
     * @param Net_URL_Mapper $m path-to-action mapper
     * @return boolean hook return
     */
    function onRouterInitialized($m)
    {
        // Discovery actions
        $m->connect('.well-known/host-meta',
                    array('action' => 'hostmeta'));
        $m->connect('main/xrd',
                    array('action' => 'xrd'));
        $m->connect('main/ostatus',
                    array('action' => 'ostatusinit'));
        $m->connect('main/ostatus?nickname=:nickname',
                  array('action' => 'ostatusinit'), array('nickname' => '[A-Za-z0-9_-]+'));
        $m->connect('main/ostatussub',
                    array('action' => 'ostatussub'));
        $m->connect('main/ostatussub',
                    array('action' => 'ostatussub'), array('feed' => '[A-Za-z0-9\.\/\:]+'));

        // PuSH actions
        $m->connect('main/push/hub', array('action' => 'pushhub'));

        $m->connect('main/push/callback/:feed',
                    array('action' => 'pushcallback'),
                    array('feed' => '[0-9]+'));

        // Salmon endpoint
        $m->connect('main/salmon/user/:id',
                    array('action' => 'usersalmon'),
                    array('id' => '[0-9]+'));
        $m->connect('main/salmon/group/:id',
                    array('action' => 'groupsalmon'),
                    array('id' => '[0-9]+'));
        return true;
    }

    /**
     * Set up queue handlers for outgoing hub pushes
     * @param QueueManager $qm
     * @return boolean hook return
     */
    function onEndInitializeQueueManager(QueueManager $qm)
    {
        // Prepare outgoing distributions after notice save.
        $qm->connect('ostatus', 'OStatusQueueHandler');

        // Outgoing from our internal PuSH hub
        $qm->connect('hubconf', 'HubConfQueueHandler');
        $qm->connect('hubout', 'HubOutQueueHandler');

        // Outgoing Salmon replies (when we don't need a return value)
        $qm->connect('salmon', 'SalmonQueueHandler');

        // Incoming from a foreign PuSH hub
        $qm->connect('pushin', 'PushInQueueHandler');
        return true;
    }

    /**
     * Put saved notices into the queue for pubsub distribution.
     */
    function onStartEnqueueNotice($notice, &$transports)
    {
        $transports[] = 'ostatus';
        return true;
    }

    /**
     * Add a link header for LRDD Discovery
     */
    function onStartShowHTML($action)
    {
        if ($action instanceof ShowstreamAction) {
            $acct = 'acct:'. $action->profile->nickname .'@'. common_config('site', 'server');
            $url = common_local_url('xrd');
            $url.= '?uri='. $acct;
            
            header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="application/xrd+xml"');
        }
    }
    
    /**
     * Set up a PuSH hub link to our internal link for canonical timeline
     * Atom feeds for users and groups.
     */
    function onStartApiAtom($feed)
    {
        $id = null;

        if ($feed instanceof AtomUserNoticeFeed) {
            $salmonAction = 'usersalmon';
            $user = $feed->getUser();
            $id   = $user->id;
            $profile = $user->getProfile();
            $feed->setActivitySubject($profile->asActivityNoun('subject'));
        } else if ($feed instanceof AtomGroupNoticeFeed) {
            $salmonAction = 'groupsalmon';
            $group = $feed->getGroup();
            $id = $group->id;
            $feed->setActivitySubject($group->asActivitySubject());
        } else {
            return true;
        }

        if (!empty($id)) {
            $hub = common_config('ostatus', 'hub');
            if (empty($hub)) {
                // Updates will be handled through our internal PuSH hub.
                $hub = common_local_url('pushhub');
            }
            $feed->addLink($hub, array('rel' => 'hub'));

            // Also, we'll add in the salmon link
            $salmon = common_local_url($salmonAction, array('id' => $id));
            $feed->addLink($salmon, array('rel' => Salmon::NS_REPLIES));
            $feed->addLink($salmon, array('rel' => Salmon::NS_MENTIONS));
        }

        return true;
    }

    /**
     * Automatically load the actions and libraries used by the plugin
     *
     * @param Class $cls the class
     *
     * @return boolean hook return
     *
     */
    function onAutoload($cls)
    {
        $base = dirname(__FILE__);
        $lower = strtolower($cls);
        $map = array('activityverb' => 'activity',
                     'activityobject' => 'activity',
                     'activityutils' => 'activity');
        if (isset($map[$lower])) {
            $lower = $map[$lower];
        }
        $files = array("$base/classes/$cls.php",
                       "$base/lib/$lower.php");
        if (substr($lower, -6) == 'action') {
            $files[] = "$base/actions/" . substr($lower, 0, -6) . ".php";
        }
        foreach ($files as $file) {
            if (file_exists($file)) {
                include_once $file;
                return false;
            }
        }
        return true;
    }

    /**
     * Add in an OStatus subscribe button
     */
    function onStartProfileRemoteSubscribe($output, $profile)
    {
        $cur = common_current_user();

        if (empty($cur)) {
            // Add an OStatus subscribe
            $output->elementStart('li', 'entity_subscribe');
            $url = common_local_url('ostatusinit',
                                    array('nickname' => $profile->nickname));
            $output->element('a', array('href' => $url,
                                        'class' => 'entity_remote_subscribe'),
                                _m('Subscribe'));

            $output->elementEnd('li');
        }

        return false;
    }

    function onStartGroupSubscribe($output, $group)
    {
        $cur = common_current_user();

        if (empty($cur)) {
            // Add an OStatus subscribe
            $output->elementStart('li', 'entity_subscribe');
            $url = common_local_url('ostatusinit',
                                    array('nickname' => $group->nickname));
            $output->element('a', array('href' => $url,
                                        'class' => 'entity_remote_subscribe'),
                                _m('Join'));

            $output->elementEnd('li');
        }

        return false;
    }


    /**
     * Check if we've got remote replies to send via Salmon.
     *
     * @fixme push webfinger lookup & sending to a background queue
     * @fixme also detect short-form name for remote subscribees where not ambiguous
     */

    function onEndNoticeSave($notice)
    {
    }

    /**
     * Find any explicit remote mentions. Accepted forms:
     *   Webfinger: @user@example.com
     *   Profile link: @example.com/mublog/user
     * @param Profile $sender (os user?)
     * @param string $text input markup text
     * @param array &$mention in/out param: set of found mentions
     * @return boolean hook return value
     */

    function onEndFindMentions($sender, $text, &$mentions)
    {
        $matches = array();

        // Webfinger matches: @user@example.com
        if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)!',
                       $text,
                       $wmatches,
                       PREG_OFFSET_CAPTURE)) {
            foreach ($wmatches[1] as $wmatch) {
                list($target, $pos) = $wmatch;
                $this->log(LOG_INFO, "Checking webfinger '$target'");
                try {
                    $oprofile = Ostatus_profile::ensureWebfinger($target);
                    if ($oprofile && !$oprofile->isGroup()) {
                        $profile = $oprofile->localProfile();
                        $matches[$pos] = array('mentioned' => array($profile),
                                               'text' => $target,
                                               'position' => $pos,
                                               'url' => $profile->profileurl);
                    }
                } catch (Exception $e) {
                    $this->log(LOG_ERR, "Webfinger check failed: " . $e->getMessage());
                }
            }
        }

        // Profile matches: @example.com/mublog/user
        if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)!',
                       $text,
                       $wmatches,
                       PREG_OFFSET_CAPTURE)) {
            foreach ($wmatches[1] as $wmatch) {
                list($target, $pos) = $wmatch;
                $schemes = array('http', 'https');
                foreach ($schemes as $scheme) {
                    $url = "$scheme://$target";
                    $this->log(LOG_INFO, "Checking profile address '$url'");
                    try {
                        $oprofile = Ostatus_profile::ensureProfile($url);
                        if ($oprofile && !$oprofile->isGroup()) {
                            $profile = $oprofile->localProfile();
                            $matches[$pos] = array('mentioned' => array($profile),
                                                   'text' => $target,
                                                   'position' => $pos,
                                                   'url' => $profile->profileurl);
                            break;
                        }
                    } catch (Exception $e) {
                        $this->log(LOG_ERR, "Profile check failed: " . $e->getMessage());
                    }
                }
            }
        }

        foreach ($mentions as $i => $other) {
            // If we share a common prefix with a local user, override it!
            $pos = $other['position'];
            if (isset($matches[$pos])) {
                $mentions[$i] = $matches[$pos];
                unset($matches[$pos]);
            }
        }
        foreach ($matches as $mention) {
            $mentions[] = $mention;
        }

        return true;
    }

    /**
     * Make sure necessary tables are filled out.
     */
    function onCheckSchema() {
        $schema = Schema::get();
        $schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
        $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
        $schema->ensureTable('feedsub', FeedSub::schemaDef());
        $schema->ensureTable('hubsub', HubSub::schemaDef());
        $schema->ensureTable('magicsig', Magicsig::schemaDef());
        return true;
    }

    function onEndShowStatusNetStyles($action) {
        $action->cssLink(common_path('plugins/OStatus/theme/base/css/ostatus.css'));
        return true;
    }

    function onEndShowStatusNetScripts($action) {
        $action->script(common_path('plugins/OStatus/js/ostatus.js'));
        return true;
    }

    /**
     * Override the "from ostatus" bit in notice lists to link to the
     * original post and show the domain it came from.
     *
     * @param Notice in $notice
     * @param string out &$name
     * @param string out &$url
     * @param string out &$title
     * @return mixed hook return code
     */
    function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
    {
        if ($notice->source == 'ostatus') {
            if ($notice->url) {
                $bits = parse_url($notice->url);
                $domain = $bits['host'];
                if (substr($domain, 0, 4) == 'www.') {
                    $name = substr($domain, 4);
                } else {
                    $name = $domain;
                }

                $url = $notice->url;
                $title = sprintf(_m("Sent from %s via OStatus"), $domain);
                return false;
            }
        }
    }

    /**
     * Send incoming PuSH feeds for OStatus endpoints in for processing.
     *
     * @param FeedSub $feedsub
     * @param DOMDocument $feed
     * @return mixed hook return code
     */
    function onStartFeedSubReceive($feedsub, $feed)
    {
        $oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
        if ($oprofile) {
            $oprofile->processFeed($feed, 'push');
        } else {
            common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
        }
    }

    /**
     * When about to subscribe to a remote user, start a server-to-server
     * PuSH subscription if needed. If we can't establish that, abort.
     *
     * @fixme If something else aborts later, we could end up with a stray
     *        PuSH subscription. This is relatively harmless, though.
     *
     * @param Profile $subscriber
     * @param Profile $other
     *
     * @return hook return code
     *
     * @throws Exception
     */
    function onStartSubscribe($subscriber, $other)
    {
        $user = User::staticGet('id', $subscriber->id);

        if (empty($user)) {
            return true;
        }

        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);

        if (empty($oprofile)) {
            return true;
        }

        if (!$oprofile->subscribe()) {
            throw new Exception(_m('Could not set up remote subscription.'));
        }
    }

    /**
     * Having established a remote subscription, send a notification to the
     * remote OStatus profile's endpoint.
     *
     * @param Profile $subscriber
     * @param Profile $other
     *
     * @return hook return code
     *
     * @throws Exception
     */
    function onEndSubscribe($subscriber, $other)
    {
        $user = User::staticGet('id', $subscriber->id);

        if (empty($user)) {
            return true;
        }

        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);

        if (empty($oprofile)) {
            return true;
        }

        $act = new Activity();

        $act->verb = ActivityVerb::FOLLOW;

        $act->id   = TagURI::mint('follow:%d:%d:%s',
                                  $subscriber->id,
                                  $other->id,
                                  common_date_iso8601(time()));

        $act->time    = time();
        $act->title   = _("Follow");
        $act->content = sprintf(_("%s is now following %s."),
                               $subscriber->getBestName(),
                               $other->getBestName());

        $act->actor   = ActivityObject::fromProfile($subscriber);
        $act->object  = ActivityObject::fromProfile($other);

        $oprofile->notifyActivity($act, $subscriber);

        return true;
    }

    /**
     * Notify remote server and garbage collect unused feeds on unsubscribe.
     * @fixme send these operations to background queues
     *
     * @param User $user
     * @param Profile $other
     * @return hook return value
     */
    function onEndUnsubscribe($profile, $other)
    {
        $user = User::staticGet('id', $profile->id);

        if (empty($user)) {
            return true;
        }

        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);

        if (empty($oprofile)) {
            return true;
        }

        // Drop the PuSH subscription if there are no other subscribers.
        $oprofile->garbageCollect();

        $act = new Activity();

        $act->verb = ActivityVerb::UNFOLLOW;

        $act->id   = TagURI::mint('unfollow:%d:%d:%s',
                                  $profile->id,
                                  $other->id,
                                  common_date_iso8601(time()));

        $act->time    = time();
        $act->title   = _("Unfollow");
        $act->content = sprintf(_("%s stopped following %s."),
                               $profile->getBestName(),
                               $other->getBestName());

        $act->actor   = ActivityObject::fromProfile($profile);
        $act->object  = ActivityObject::fromProfile($other);

        $oprofile->notifyActivity($act, $profile);

        return true;
    }

    /**
     * When one of our local users tries to join a remote group,
     * notify the remote server. If the notification is rejected,
     * deny the join.
     *
     * @param User_group $group
     * @param User $user
     *
     * @return mixed hook return value
     */

    function onStartJoinGroup($group, $user)
    {
        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
        if ($oprofile) {
            if (!$oprofile->subscribe()) {
                throw new Exception(_m('Could not set up remote group membership.'));
            }

            $member = Profile::staticGet($user->id);

            $act = new Activity();
            $act->id = TagURI::mint('join:%d:%d:%s',
                                    $member->id,
                                    $group->id,
                                    common_date_iso8601(time()));

            $act->actor = ActivityObject::fromProfile($member);
            $act->verb = ActivityVerb::JOIN;
            $act->object = $oprofile->asActivityObject();

            $act->time = time();
            $act->title = _m("Join");
            $act->content = sprintf(_m("%s has joined group %s."),
                                    $member->getBestName(),
                                    $oprofile->getBestName());

            if ($oprofile->notifyActivity($act, $member)) {
                return true;
            } else {
                $oprofile->garbageCollect();
                throw new Exception(_m("Failed joining remote group."));
            }
        }
    }

    /**
     * When one of our local users leaves a remote group, notify the remote
     * server.
     *
     * @fixme Might be good to schedule a resend of the leave notification
     * if it failed due to a transitory error. We've canceled the local
     * membership already anyway, but if the remote server comes back up
     * it'll be left with a stray membership record.
     *
     * @param User_group $group
     * @param User $user
     *
     * @return mixed hook return value
     */

    function onEndLeaveGroup($group, $user)
    {
        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
        if ($oprofile) {
            // Drop the PuSH subscription if there are no other subscribers.
            $oprofile->garbageCollect();


            $member = Profile::staticGet($user->id);

            $act = new Activity();
            $act->id = TagURI::mint('leave:%d:%d:%s',
                                    $member->id,
                                    $group->id,
                                    common_date_iso8601(time()));

            $act->actor = ActivityObject::fromProfile($member);
            $act->verb = ActivityVerb::LEAVE;
            $act->object = $oprofile->asActivityObject();

            $act->time = time();
            $act->title = _m("Leave");
            $act->content = sprintf(_m("%s has left group %s."),
                                    $member->getBestName(),
                                    $oprofile->getBestName());

            $oprofile->notifyActivity($act, $member);
        }
    }

    /**
     * Notify remote users when their notices get favorited.
     *
     * @param Profile or User $profile of local user doing the faving
     * @param Notice $notice being favored
     * @return hook return value
     */

    function onEndFavorNotice(Profile $profile, Notice $notice)
    {
        $user = User::staticGet('id', $profile->id);

        if (empty($user)) {
            return true;
        }

        $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);

        if (empty($oprofile)) {
            return true;
        }

        $act = new Activity();

        $act->verb = ActivityVerb::FAVORITE;
        $act->id   = TagURI::mint('favor:%d:%d:%s',
                                  $profile->id,
                                  $notice->id,
                                  common_date_iso8601(time()));

        $act->time    = time();
        $act->title   = _("Favor");
        $act->content = sprintf(_("%s marked notice %s as a favorite."),
                               $profile->getBestName(),
                               $notice->uri);

        $act->actor   = ActivityObject::fromProfile($profile);
        $act->object  = ActivityObject::fromNotice($notice);

        $oprofile->notifyActivity($act, $profile);

        return true;
    }

    /**
     * Notify remote users when their notices get de-favorited.
     *
     * @param Profile $profile Profile person doing the de-faving
     * @param Notice  $notice  Notice being favored
     *
     * @return hook return value
     */

    function onEndDisfavorNotice(Profile $profile, Notice $notice)
    {
        $user = User::staticGet('id', $profile->id);

        if (empty($user)) {
            return true;
        }

        $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);

        if (empty($oprofile)) {
            return true;
        }

        $act = new Activity();

        $act->verb = ActivityVerb::UNFAVORITE;
        $act->id   = TagURI::mint('disfavor:%d:%d:%s',
                                  $profile->id,
                                  $notice->id,
                                  common_date_iso8601(time()));
        $act->time    = time();
        $act->title   = _("Disfavor");
        $act->content = sprintf(_("%s marked notice %s as no longer a favorite."),
                               $profile->getBestName(),
                               $notice->uri);

        $act->actor   = ActivityObject::fromProfile($profile);
        $act->object  = ActivityObject::fromNotice($notice);

        $oprofile->notifyActivity($act, $profile);

        return true;
    }

    function onStartGetProfileUri($profile, &$uri)
    {
        $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
        if (!empty($oprofile)) {
            $uri = $oprofile->uri;
            return false;
        }
        return true;
    }

    function onStartUserGroupHomeUrl($group, &$url)
    {
        return $this->onStartUserGroupPermalink($group, $url);
    }

    function onStartUserGroupPermalink($group, &$url)
    {
        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
        if ($oprofile) {
            // @fixme this should probably be in the user_group table
            // @fixme this uri not guaranteed to be a profile page
            $url = $oprofile->uri;
            return false;
        }
    }

    function onStartShowSubscriptionsContent($action)
    {
        $this->showEntityRemoteSubscribe($action);

        return true;
    }

    function onEndShowSubscriptionsMiniList($action)
    {
        $this->showEntityRemoteSubscribe($action);

        return true;
    }

    function onEndShowGroupsMiniList($action)
    {
        $this->showEntityRemoteSubscribe($action);

        return true;
    }

    function showEntityRemoteSubscribe($action)
    {
        $user = common_current_user();
        if ($user && ($user->id == $action->profile->id)) {
            $action->elementStart('div', 'entity_actions');
            $action->elementStart('p', array('id' => 'entity_remote_subscribe',
                                             'class' => 'entity_subscribe'));
            $action->element('a', array('href' => common_local_url('ostatussub'),
                                        'class' => 'entity_remote_subscribe')
                                , _m('New'));
            $action->elementEnd('p');
            $action->elementEnd('div');
        }
    }

    /**
     * Ping remote profiles with updates to this profile.
     * Salmon pings are queued for background processing.
     */
    function onEndBroadcastProfile(Profile $profile)
    {
        $user = User::staticGet('id', $profile->id);

        // Find foreign accounts I'm subscribed to that support Salmon pings.
        //
        // @fixme we could run updates through the PuSH feed too,
        // in which case we can skip Salmon pings to folks who
        // are also subscribed to me.
        $sql = "SELECT * FROM ostatus_profile " .
               "WHERE profile_id IN " .
               "(SELECT subscribed FROM subscription WHERE subscriber=%d) " .
               "OR group_id IN " .
               "(SELECT group_id FROM group_member WHERE profile_id=%d)";
        $oprofile = new Ostatus_profile();
        $oprofile->query(sprintf($sql, $profile->id, $profile->id));

        if ($oprofile->N == 0) {
            common_log(LOG_DEBUG, "No OStatus remote subscribees for $profile->nickname");
            return true;
        }

        $act = new Activity();

        $act->verb = ActivityVerb::UPDATE_PROFILE;
        $act->id   = TagURI::mint('update-profile:%d:%s',
                                  $profile->id,
                                  common_date_iso8601(time()));
        $act->time    = time();
        $act->title   = _m("Profile update");
        $act->content = sprintf(_m("%s has updated their profile page."),
                               $profile->getBestName());

        $act->actor   = ActivityObject::fromProfile($profile);
        $act->object  = $act->actor;

        while ($oprofile->fetch()) {
            $oprofile->notifyDeferred($act, $profile);
        }

        return true;
    }
}