plugins/OStatus/OStatusPlugin.php

   1 <?php
   2 /*
   3  * StatusNet - the distributed open-source microblogging tool
   4  * Copyright (C) 2009-2010, StatusNet, Inc.
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Affero General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /**
  21  * @package OStatusPlugin
  22  * @maintainer Brion Vibber <brion@status.net>
  23  */
  24
  25 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
  26
  27 set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/');
  28
  29 class FeedSubException extends Exception
  30 {
  31 }
  32
  33 class OStatusPlugin extends Plugin
  34 {
  35     /**
  36      * Hook for RouterInitialized event.
  37      *
  38      * @param Net_URL_Mapper $m path-to-action mapper
  39      * @return boolean hook return
  40      */
  41     function onRouterInitialized($m)
  42     {
  43         // Discovery actions
  44         $m->connect('.well-known/host-meta',
  45                     array('action' => 'hostmeta'));
  46         $m->connect('main/xrd',
  47                     array('action' => 'xrd'));
  48         $m->connect('main/ostatus',
  49                     array('action' => 'ostatusinit'));
  50         $m->connect('main/ostatus?nickname=:nickname',
  51                   array('action' => 'ostatusinit'), array('nickname' => '[A-Za-z0-9_-]+'));
  52         $m->connect('main/ostatussub',
  53                     array('action' => 'ostatussub'));
  54         $m->connect('main/ostatussub',
  55                     array('action' => 'ostatussub'), array('feed' => '[A-Za-z0-9\.\/\:]+'));
  56
  57         // PuSH actions
  58         $m->connect('main/push/hub', array('action' => 'pushhub'));
  59
  60         $m->connect('main/push/callback/:feed',
  61                     array('action' => 'pushcallback'),
  62                     array('feed' => '[0-9]+'));
  63
  64         // Salmon endpoint
  65         $m->connect('main/salmon/user/:id',
  66                     array('action' => 'usersalmon'),
  67                     array('id' => '[0-9]+'));
  68         $m->connect('main/salmon/group/:id',
  69                     array('action' => 'groupsalmon'),
  70                     array('id' => '[0-9]+'));
  71         return true;
  72     }
  73
  74     /**
  75      * Set up queue handlers for outgoing hub pushes
  76      * @param QueueManager $qm
  77      * @return boolean hook return
  78      */
  79     function onEndInitializeQueueManager(QueueManager $qm)
  80     {
  81         // Prepare outgoing distributions after notice save.
  82         $qm->connect('ostatus', 'OStatusQueueHandler');
  83
  84         // Outgoing from our internal PuSH hub
  85         $qm->connect('hubconf', 'HubConfQueueHandler');
  86         $qm->connect('hubout', 'HubOutQueueHandler');
  87
  88         // Outgoing Salmon replies (when we don't need a return value)
  89         $qm->connect('salmon', 'SalmonQueueHandler');
  90
  91         // Incoming from a foreign PuSH hub
  92         $qm->connect('pushin', 'PushInQueueHandler');
  93         return true;
  94     }
  95
  96     /**
  97      * Put saved notices into the queue for pubsub distribution.
  98      */
  99     function onStartEnqueueNotice($notice, &$transports)
 100     {
 101         $transports[] = 'ostatus';
 102         return true;
 103     }
 104
 105     /**
 106      * Add a link header for LRDD Discovery
 107      */
 108     function onStartShowHTML($action)
 109     {
 110         if ($action instanceof ShowstreamAction) {
 111             $acct = 'acct:'. $action->profile->nickname .'@'. common_config('site', 'server');
 112             $url = common_local_url('xrd');
 113             $url.= '?uri='. $acct;
 114
 115             header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="application/xrd+xml"');
 116         }
 117     }
 118
 119     /**
 120      * Set up a PuSH hub link to our internal link for canonical timeline
 121      * Atom feeds for users and groups.
 122      */
 123     function onStartApiAtom($feed)
 124     {
 125         $id = null;
 126
 127         if ($feed instanceof AtomUserNoticeFeed) {
 128             $salmonAction = 'usersalmon';
 129             $user = $feed->getUser();
 130             $id   = $user->id;
 131             $profile = $user->getProfile();
 132             $feed->setActivitySubject($profile->asActivityNoun('subject'));
 133         } else if ($feed instanceof AtomGroupNoticeFeed) {
 134             $salmonAction = 'groupsalmon';
 135             $group = $feed->getGroup();
 136             $id = $group->id;
 137             $feed->setActivitySubject($group->asActivitySubject());
 138         } else {
 139             return true;
 140         }
 141
 142         if (!empty($id)) {
 143             $hub = common_config('ostatus', 'hub');
 144             if (empty($hub)) {
 145                 // Updates will be handled through our internal PuSH hub.
 146                 $hub = common_local_url('pushhub');
 147             }
 148             $feed->addLink($hub, array('rel' => 'hub'));
 149
 150             // Also, we'll add in the salmon link
 151             $salmon = common_local_url($salmonAction, array('id' => $id));
 152             $feed->addLink($salmon, array('rel' => Salmon::NS_REPLIES));
 153             $feed->addLink($salmon, array('rel' => Salmon::NS_MENTIONS));
 154         }
 155
 156         return true;
 157     }
 158
 159     /**
 160      * Automatically load the actions and libraries used by the plugin
 161      *
 162      * @param Class $cls the class
 163      *
 164      * @return boolean hook return
 165      *
 166      */
 167     function onAutoload($cls)
 168     {
 169         $base = dirname(__FILE__);
 170         $lower = strtolower($cls);
 171         $map = array('activityverb' => 'activity',
 172                      'activityobject' => 'activity',
 173                      'activityutils' => 'activity');
 174         if (isset($map[$lower])) {
 175             $lower = $map[$lower];
 176         }
 177         $files = array("$base/classes/$cls.php",
 178                        "$base/lib/$lower.php");
 179         if (substr($lower, -6) == 'action') {
 180             $files[] = "$base/actions/" . substr($lower, 0, -6) . ".php";
 181         }
 182         foreach ($files as $file) {
 183             if (file_exists($file)) {
 184                 include_once $file;
 185                 return false;
 186             }
 187         }
 188         return true;
 189     }
 190
 191     /**
 192      * Add in an OStatus subscribe button
 193      */
 194     function onStartProfileRemoteSubscribe($output, $profile)
 195     {
 196         $cur = common_current_user();
 197
 198         if (empty($cur)) {
 199             // Add an OStatus subscribe
 200             $output->elementStart('li', 'entity_subscribe');
 201             $url = common_local_url('ostatusinit',
 202                                     array('nickname' => $profile->nickname));
 203             $output->element('a', array('href' => $url,
 204                                         'class' => 'entity_remote_subscribe'),
 205                                 _m('Subscribe'));
 206
 207             $output->elementEnd('li');
 208         }
 209
 210         return false;
 211     }
 212
 213     function onStartGroupSubscribe($output, $group)
 214     {
 215         $cur = common_current_user();
 216
 217         if (empty($cur)) {
 218             // Add an OStatus subscribe
 219             $output->elementStart('li', 'entity_subscribe');
 220             $url = common_local_url('ostatusinit',
 221                                     array('nickname' => $group->nickname));
 222             $output->element('a', array('href' => $url,
 223                                         'class' => 'entity_remote_subscribe'),
 224                                 _m('Join'));
 225
 226             $output->elementEnd('li');
 227         }
 228
 229         return false;
 230     }
 231
 232     /**
 233      * Check if we've got remote replies to send via Salmon.
 234      *
 235      * @fixme push webfinger lookup & sending to a background queue
 236      * @fixme also detect short-form name for remote subscribees where not ambiguous
 237      */
 238
 239     function onEndNoticeSave($notice)
 240     {
 241     }
 242
 243     /**
 244      * Find any explicit remote mentions. Accepted forms:
 245      *   Webfinger: @user@example.com
 246      *   Profile link: @example.com/mublog/user
 247      * @param Profile $sender (os user?)
 248      * @param string $text input markup text
 249      * @param array &$mention in/out param: set of found mentions
 250      * @return boolean hook return value
 251      */
 252
 253     function onEndFindMentions($sender, $text, &$mentions)
 254     {
 255         $matches = array();
 256
 257         // Webfinger matches: @user@example.com
 258         if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)!',
 259                        $text,
 260                        $wmatches,
 261                        PREG_OFFSET_CAPTURE)) {
 262             foreach ($wmatches[1] as $wmatch) {
 263                 list($target, $pos) = $wmatch;
 264                 $this->log(LOG_INFO, "Checking webfinger '$target'");
 265                 try {
 266                     $oprofile = Ostatus_profile::ensureWebfinger($target);
 267                     if ($oprofile && !$oprofile->isGroup()) {
 268                         $profile = $oprofile->localProfile();
 269                         $matches[$pos] = array('mentioned' => array($profile),
 270                                                'text' => $target,
 271                                                'position' => $pos,
 272                                                'url' => $profile->profileurl);
 273                     }
 274                 } catch (Exception $e) {
 275                     $this->log(LOG_ERR, "Webfinger check failed: " . $e->getMessage());
 276                 }
 277             }
 278         }
 279
 280         // Profile matches: @example.com/mublog/user
 281         if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)!',
 282                        $text,
 283                        $wmatches,
 284                        PREG_OFFSET_CAPTURE)) {
 285             foreach ($wmatches[1] as $wmatch) {
 286                 list($target, $pos) = $wmatch;
 287                 $schemes = array('http', 'https');
 288                 foreach ($schemes as $scheme) {
 289                     $url = "$scheme://$target";
 290                     $this->log(LOG_INFO, "Checking profile address '$url'");
 291                     try {
 292                         $oprofile = Ostatus_profile::ensureProfile($url);
 293                         if ($oprofile && !$oprofile->isGroup()) {
 294                             $profile = $oprofile->localProfile();
 295                             $matches[$pos] = array('mentioned' => array($profile),
 296                                                    'text' => $target,
 297                                                    'position' => $pos,
 298                                                    'url' => $profile->profileurl);
 299                             break;
 300                         }
 301                     } catch (Exception $e) {
 302                         $this->log(LOG_ERR, "Profile check failed: " . $e->getMessage());
 303                     }
 304                 }
 305             }
 306         }
 307
 308         foreach ($mentions as $i => $other) {
 309             // If we share a common prefix with a local user, override it!
 310             $pos = $other['position'];
 311             if (isset($matches[$pos])) {
 312                 $mentions[$i] = $matches[$pos];
 313                 unset($matches[$pos]);
 314             }
 315         }
 316         foreach ($matches as $mention) {
 317             $mentions[] = $mention;
 318         }
 319
 320         return true;
 321     }
 322
 323     /**
 324      * Make sure necessary tables are filled out.
 325      */
 326     function onCheckSchema() {
 327         $schema = Schema::get();
 328         $schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
 329         $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
 330         $schema->ensureTable('feedsub', FeedSub::schemaDef());
 331         $schema->ensureTable('hubsub', HubSub::schemaDef());
 332         $schema->ensureTable('magicsig', Magicsig::schemaDef());
 333         return true;
 334     }
 335
 336     function onEndShowStatusNetStyles($action) {
 337         $action->cssLink(common_path('plugins/OStatus/theme/base/css/ostatus.css'));
 338         return true;
 339     }
 340
 341     function onEndShowStatusNetScripts($action) {
 342         $action->script(common_path('plugins/OStatus/js/ostatus.js'));
 343         return true;
 344     }
 345
 346     /**
 347      * Override the "from ostatus" bit in notice lists to link to the
 348      * original post and show the domain it came from.
 349      *
 350      * @param Notice in $notice
 351      * @param string out &$name
 352      * @param string out &$url
 353      * @param string out &$title
 354      * @return mixed hook return code
 355      */
 356     function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
 357     {
 358         if ($notice->source == 'ostatus') {
 359             if ($notice->url) {
 360                 $bits = parse_url($notice->url);
 361                 $domain = $bits['host'];
 362                 if (substr($domain, 0, 4) == 'www.') {
 363                     $name = substr($domain, 4);
 364                 } else {
 365                     $name = $domain;
 366                 }
 367
 368                 $url = $notice->url;
 369                 $title = sprintf(_m("Sent from %s via OStatus"), $domain);
 370                 return false;
 371             }
 372         }
 373     }
 374
 375     /**
 376      * Send incoming PuSH feeds for OStatus endpoints in for processing.
 377      *
 378      * @param FeedSub $feedsub
 379      * @param DOMDocument $feed
 380      * @return mixed hook return code
 381      */
 382     function onStartFeedSubReceive($feedsub, $feed)
 383     {
 384         $oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
 385         if ($oprofile) {
 386             $oprofile->processFeed($feed, 'push');
 387         } else {
 388             common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
 389         }
 390     }
 391
 392     /**
 393      * When about to subscribe to a remote user, start a server-to-server
 394      * PuSH subscription if needed. If we can't establish that, abort.
 395      *
 396      * @fixme If something else aborts later, we could end up with a stray
 397      *        PuSH subscription. This is relatively harmless, though.
 398      *
 399      * @param Profile $subscriber
 400      * @param Profile $other
 401      *
 402      * @return hook return code
 403      *
 404      * @throws Exception
 405      */
 406     function onStartSubscribe($subscriber, $other)
 407     {
 408         $user = User::staticGet('id', $subscriber->id);
 409
 410         if (empty($user)) {
 411             return true;
 412         }
 413
 414         $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
 415
 416         if (empty($oprofile)) {
 417             return true;
 418         }
 419
 420         if (!$oprofile->subscribe()) {
 421             throw new Exception(_m('Could not set up remote subscription.'));
 422         }
 423     }
 424
 425     /**
 426      * Having established a remote subscription, send a notification to the
 427      * remote OStatus profile's endpoint.
 428      *
 429      * @param Profile $subscriber
 430      * @param Profile $other
 431      *
 432      * @return hook return code
 433      *
 434      * @throws Exception
 435      */
 436     function onEndSubscribe($subscriber, $other)
 437     {
 438         $user = User::staticGet('id', $subscriber->id);
 439
 440         if (empty($user)) {
 441             return true;
 442         }
 443
 444         $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
 445
 446         if (empty($oprofile)) {
 447             return true;
 448         }
 449
 450         $act = new Activity();
 451
 452         $act->verb = ActivityVerb::FOLLOW;
 453
 454         $act->id   = TagURI::mint('follow:%d:%d:%s',
 455                                   $subscriber->id,
 456                                   $other->id,
 457                                   common_date_iso8601(time()));
 458
 459         $act->time    = time();
 460         $act->title   = _("Follow");
 461         $act->content = sprintf(_("%s is now following %s."),
 462                                $subscriber->getBestName(),
 463                                $other->getBestName());
 464
 465         $act->actor   = ActivityObject::fromProfile($subscriber);
 466         $act->object  = ActivityObject::fromProfile($other);
 467
 468         $oprofile->notifyActivity($act, $subscriber);
 469
 470         return true;
 471     }
 472
 473     /**
 474      * Notify remote server and garbage collect unused feeds on unsubscribe.
 475      * @fixme send these operations to background queues
 476      *
 477      * @param User $user
 478      * @param Profile $other
 479      * @return hook return value
 480      */
 481     function onEndUnsubscribe($profile, $other)
 482     {
 483         $user = User::staticGet('id', $profile->id);
 484
 485         if (empty($user)) {
 486             return true;
 487         }
 488
 489         $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
 490
 491         if (empty($oprofile)) {
 492             return true;
 493         }
 494
 495         // Drop the PuSH subscription if there are no other subscribers.
 496         $oprofile->garbageCollect();
 497
 498         $act = new Activity();
 499
 500         $act->verb = ActivityVerb::UNFOLLOW;
 501
 502         $act->id   = TagURI::mint('unfollow:%d:%d:%s',
 503                                   $profile->id,
 504                                   $other->id,
 505                                   common_date_iso8601(time()));
 506
 507         $act->time    = time();
 508         $act->title   = _("Unfollow");
 509         $act->content = sprintf(_("%s stopped following %s."),
 510                                $profile->getBestName(),
 511                                $other->getBestName());
 512
 513         $act->actor   = ActivityObject::fromProfile($profile);
 514         $act->object  = ActivityObject::fromProfile($other);
 515
 516         $oprofile->notifyActivity($act, $profile);
 517
 518         return true;
 519     }
 520
 521     /**
 522      * When one of our local users tries to join a remote group,
 523      * notify the remote server. If the notification is rejected,
 524      * deny the join.
 525      *
 526      * @param User_group $group
 527      * @param User $user
 528      *
 529      * @return mixed hook return value
 530      */
 531
 532     function onStartJoinGroup($group, $user)
 533     {
 534         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
 535         if ($oprofile) {
 536             if (!$oprofile->subscribe()) {
 537                 throw new Exception(_m('Could not set up remote group membership.'));
 538             }
 539
 540             $member = Profile::staticGet($user->id);
 541
 542             $act = new Activity();
 543             $act->id = TagURI::mint('join:%d:%d:%s',
 544                                     $member->id,
 545                                     $group->id,
 546                                     common_date_iso8601(time()));
 547
 548             $act->actor = ActivityObject::fromProfile($member);
 549             $act->verb = ActivityVerb::JOIN;
 550             $act->object = $oprofile->asActivityObject();
 551
 552             $act->time = time();
 553             $act->title = _m("Join");
 554             $act->content = sprintf(_m("%s has joined group %s."),
 555                                     $member->getBestName(),
 556                                     $oprofile->getBestName());
 557
 558             if ($oprofile->notifyActivity($act, $member)) {
 559                 return true;
 560             } else {
 561                 $oprofile->garbageCollect();
 562                 throw new Exception(_m("Failed joining remote group."));
 563             }
 564         }
 565     }
 566
 567     /**
 568      * When one of our local users leaves a remote group, notify the remote
 569      * server.
 570      *
 571      * @fixme Might be good to schedule a resend of the leave notification
 572      * if it failed due to a transitory error. We've canceled the local
 573      * membership already anyway, but if the remote server comes back up
 574      * it'll be left with a stray membership record.
 575      *
 576      * @param User_group $group
 577      * @param User $user
 578      *
 579      * @return mixed hook return value
 580      */
 581
 582     function onEndLeaveGroup($group, $user)
 583     {
 584         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
 585         if ($oprofile) {
 586             // Drop the PuSH subscription if there are no other subscribers.
 587             $oprofile->garbageCollect();
 588
 589             $member = Profile::staticGet($user->id);
 590
 591             $act = new Activity();
 592             $act->id = TagURI::mint('leave:%d:%d:%s',
 593                                     $member->id,
 594                                     $group->id,
 595                                     common_date_iso8601(time()));
 596
 597             $act->actor = ActivityObject::fromProfile($member);
 598             $act->verb = ActivityVerb::LEAVE;
 599             $act->object = $oprofile->asActivityObject();
 600
 601             $act->time = time();
 602             $act->title = _m("Leave");
 603             $act->content = sprintf(_m("%s has left group %s."),
 604                                     $member->getBestName(),
 605                                     $oprofile->getBestName());
 606
 607             $oprofile->notifyActivity($act, $member);
 608         }
 609     }
 610
 611     /**
 612      * Notify remote users when their notices get favorited.
 613      *
 614      * @param Profile or User $profile of local user doing the faving
 615      * @param Notice $notice being favored
 616      * @return hook return value
 617      */
 618
 619     function onEndFavorNotice(Profile $profile, Notice $notice)
 620     {
 621         $user = User::staticGet('id', $profile->id);
 622
 623         if (empty($user)) {
 624             return true;
 625         }
 626
 627         $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
 628
 629         if (empty($oprofile)) {
 630             return true;
 631         }
 632
 633         $act = new Activity();
 634
 635         $act->verb = ActivityVerb::FAVORITE;
 636         $act->id   = TagURI::mint('favor:%d:%d:%s',
 637                                   $profile->id,
 638                                   $notice->id,
 639                                   common_date_iso8601(time()));
 640
 641         $act->time    = time();
 642         $act->title   = _("Favor");
 643         $act->content = sprintf(_("%s marked notice %s as a favorite."),
 644                                $profile->getBestName(),
 645                                $notice->uri);
 646
 647         $act->actor   = ActivityObject::fromProfile($profile);
 648         $act->object  = ActivityObject::fromNotice($notice);
 649
 650         $oprofile->notifyActivity($act, $profile);
 651
 652         return true;
 653     }
 654
 655     /**
 656      * Notify remote users when their notices get de-favorited.
 657      *
 658      * @param Profile $profile Profile person doing the de-faving
 659      * @param Notice  $notice  Notice being favored
 660      *
 661      * @return hook return value
 662      */
 663
 664     function onEndDisfavorNotice(Profile $profile, Notice $notice)
 665     {
 666         $user = User::staticGet('id', $profile->id);
 667
 668         if (empty($user)) {
 669             return true;
 670         }
 671
 672         $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
 673
 674         if (empty($oprofile)) {
 675             return true;
 676         }
 677
 678         $act = new Activity();
 679
 680         $act->verb = ActivityVerb::UNFAVORITE;
 681         $act->id   = TagURI::mint('disfavor:%d:%d:%s',
 682                                   $profile->id,
 683                                   $notice->id,
 684                                   common_date_iso8601(time()));
 685         $act->time    = time();
 686         $act->title   = _("Disfavor");
 687         $act->content = sprintf(_("%s marked notice %s as no longer a favorite."),
 688                                $profile->getBestName(),
 689                                $notice->uri);
 690
 691         $act->actor   = ActivityObject::fromProfile($profile);
 692         $act->object  = ActivityObject::fromNotice($notice);
 693
 694         $oprofile->notifyActivity($act, $profile);
 695
 696         return true;
 697     }
 698
 699     function onStartGetProfileUri($profile, &$uri)
 700     {
 701         $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
 702         if (!empty($oprofile)) {
 703             $uri = $oprofile->uri;
 704             return false;
 705         }
 706         return true;
 707     }
 708
 709     function onStartUserGroupHomeUrl($group, &$url)
 710     {
 711         return $this->onStartUserGroupPermalink($group, $url);
 712     }
 713
 714     function onStartUserGroupPermalink($group, &$url)
 715     {
 716         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
 717         if ($oprofile) {
 718             // @fixme this should probably be in the user_group table
 719             // @fixme this uri not guaranteed to be a profile page
 720             $url = $oprofile->uri;
 721             return false;
 722         }
 723     }
 724
 725     function onStartShowSubscriptionsContent($action)
 726     {
 727         $this->showEntityRemoteSubscribe($action);
 728
 729         return true;
 730     }
 731
 732     function onEndShowSubscriptionsMiniList($action)
 733     {
 734         $this->showEntityRemoteSubscribe($action);
 735
 736         return true;
 737     }
 738
 739     function onEndShowGroupsMiniList($action)
 740     {
 741         $this->showEntityRemoteSubscribe($action);
 742
 743         return true;
 744     }
 745
 746     function showEntityRemoteSubscribe($action)
 747     {
 748         $user = common_current_user();
 749         if ($user && ($user->id == $action->profile->id)) {
 750             $action->elementStart('div', 'entity_actions');
 751             $action->elementStart('p', array('id' => 'entity_remote_subscribe',
 752                                              'class' => 'entity_subscribe'));
 753             $action->element('a', array('href' => common_local_url('ostatussub'),
 754                                         'class' => 'entity_remote_subscribe')
 755                                 , _m('Remote'));
 756             $action->elementEnd('p');
 757             $action->elementEnd('div');
 758         }
 759     }
 760
 761     /**
 762      * Ping remote profiles with updates to this profile.
 763      * Salmon pings are queued for background processing.
 764      */
 765     function onEndBroadcastProfile(Profile $profile)
 766     {
 767         $user = User::staticGet('id', $profile->id);
 768
 769         // Find foreign accounts I'm subscribed to that support Salmon pings.
 770         //
 771         // @fixme we could run updates through the PuSH feed too,
 772         // in which case we can skip Salmon pings to folks who
 773         // are also subscribed to me.
 774         $sql = "SELECT * FROM ostatus_profile " .
 775                "WHERE profile_id IN " .
 776                "(SELECT subscribed FROM subscription WHERE subscriber=%d) " .
 777                "OR group_id IN " .
 778                "(SELECT group_id FROM group_member WHERE profile_id=%d)";
 779         $oprofile = new Ostatus_profile();
 780         $oprofile->query(sprintf($sql, $profile->id, $profile->id));
 781
 782         if ($oprofile->N == 0) {
 783             common_log(LOG_DEBUG, "No OStatus remote subscribees for $profile->nickname");
 784             return true;
 785         }
 786
 787         $act = new Activity();
 788
 789         $act->verb = ActivityVerb::UPDATE_PROFILE;
 790         $act->id   = TagURI::mint('update-profile:%d:%s',
 791                                   $profile->id,
 792                                   common_date_iso8601(time()));
 793         $act->time    = time();
 794         $act->title   = _m("Profile update");
 795         $act->content = sprintf(_m("%s has updated their profile page."),
 796                                $profile->getBestName());
 797
 798         $act->actor   = ActivityObject::fromProfile($profile);
 799         $act->object  = $act->actor;
 800
 801         while ($oprofile->fetch()) {
 802             $oprofile->notifyDeferred($act, $profile);
 803         }
 804
 805         return true;
 806     }
 807
 808     function onStartProfileListItemActionElements($item)
 809     {
 810         if (!common_logged_in()) {
 811
 812             $profileUser = User::staticGet('id', $item->profile->id);
 813
 814             if (!empty($profileUser)) {
 815
 816                 $output = $item->out;
 817
 818                 // Add an OStatus subscribe
 819                 $output->elementStart('li', 'entity_subscribe');
 820                 $url = common_local_url('ostatusinit',
 821                                         array('nickname' => $profileUser->nickname));
 822                 $output->element('a', array('href' => $url,
 823                                             'class' => 'entity_remote_subscribe'),
 824                                  _m('Subscribe'));
 825                 $output->elementEnd('li');
 826             }
 827         }
 828
 829         return true;
 830     }
 831 }