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')) {
  26     exit(1);
  27 }
  28
  29 set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/');
  30
  31 class FeedSubException extends Exception
  32 {
  33     function __construct($msg=null)
  34     {
  35         $type = get_class($this);
  36         if ($msg) {
  37             parent::__construct("$type: $msg");
  38         } else {
  39             parent::__construct($type);
  40         }
  41     }
  42 }
  43
  44 class OStatusPlugin extends Plugin
  45 {
  46     /**
  47      * Hook for RouterInitialized event.
  48      *
  49      * @param Net_URL_Mapper $m path-to-action mapper
  50      * @return boolean hook return
  51      */
  52     function onRouterInitialized($m)
  53     {
  54         // Discovery actions
  55         $m->connect('main/ownerxrd',
  56                     array('action' => 'ownerxrd'));
  57         $m->connect('main/ostatus',
  58                     array('action' => 'ostatusinit'));
  59         $m->connect('main/ostatustag',
  60                     array('action' => 'ostatustag'));
  61         $m->connect('main/ostatustag?nickname=:nickname',
  62                     array('action' => 'ostatustag'), array('nickname' => '[A-Za-z0-9_-]+'));
  63         $m->connect('main/ostatus?nickname=:nickname',
  64                   array('action' => 'ostatusinit'), array('nickname' => '[A-Za-z0-9_-]+'));
  65         $m->connect('main/ostatus?group=:group',
  66                   array('action' => 'ostatusinit'), array('group' => '[A-Za-z0-9_-]+'));
  67         $m->connect('main/ostatus?peopletag=:peopletag&tagger=:tagger',
  68                   array('action' => 'ostatusinit'), array('tagger' => '[A-Za-z0-9_-]+',
  69                                                           'peopletag' => '[A-Za-z0-9_-]+'));
  70
  71         // Remote subscription actions
  72         $m->connect('main/ostatussub',
  73                     array('action' => 'ostatussub'));
  74         $m->connect('main/ostatusgroup',
  75                     array('action' => 'ostatusgroup'));
  76         $m->connect('main/ostatuspeopletag',
  77                     array('action' => 'ostatuspeopletag'));
  78
  79         // PuSH actions
  80         $m->connect('main/push/hub', array('action' => 'pushhub'));
  81
  82         $m->connect('main/push/callback/:feed',
  83                     array('action' => 'pushcallback'),
  84                     array('feed' => '[0-9]+'));
  85
  86         // Salmon endpoint
  87         $m->connect('main/salmon/user/:id',
  88                     array('action' => 'usersalmon'),
  89                     array('id' => '[0-9]+'));
  90         $m->connect('main/salmon/group/:id',
  91                     array('action' => 'groupsalmon'),
  92                     array('id' => '[0-9]+'));
  93         $m->connect('main/salmon/peopletag/:id',
  94                     array('action' => 'peopletagsalmon'),
  95                     array('id' => '[0-9]+'));
  96         return true;
  97     }
  98
  99     /**
 100      * Set up queue handlers for outgoing hub pushes
 101      * @param QueueManager $qm
 102      * @return boolean hook return
 103      */
 104     function onEndInitializeQueueManager(QueueManager $qm)
 105     {
 106         // Prepare outgoing distributions after notice save.
 107         $qm->connect('ostatus', 'OStatusQueueHandler');
 108
 109         // Outgoing from our internal PuSH hub
 110         $qm->connect('hubconf', 'HubConfQueueHandler');
 111         $qm->connect('hubprep', 'HubPrepQueueHandler');
 112
 113         $qm->connect('hubout', 'HubOutQueueHandler');
 114
 115         // Outgoing Salmon replies (when we don't need a return value)
 116         $qm->connect('salmon', 'SalmonQueueHandler');
 117
 118         // Incoming from a foreign PuSH hub
 119         $qm->connect('pushin', 'PushInQueueHandler');
 120         return true;
 121     }
 122
 123     /**
 124      * Put saved notices into the queue for pubsub distribution.
 125      */
 126     function onStartEnqueueNotice($notice, &$transports)
 127     {
 128         if ($notice->isLocal()) {
 129                  if ($notice->inScope(null)) {
 130                 // put our transport first, in case there's any conflict (like OMB)
 131                 array_unshift($transports, 'ostatus');
 132                         $this->log(LOG_INFO, "Notice {$notice->id} queued for OStatus processing");
 133                  } else {
 134                         // FIXME: we don't do privacy-controlled OStatus updates yet.
 135                         // once that happens, finer grain of control here.
 136                         $this->log(LOG_NOTICE, "Not queueing notice {$notice->id} for OStatus because of privacy; scope = {$notice->scope}");
 137                  }
 138         } else {
 139                 $this->log(LOG_NOTICE, "Not queueing notice {$notice->id} for OStatus because it's not local.");
 140         }
 141         return true;
 142     }
 143
 144     /**
 145      * Add a link header for LRDD Discovery
 146      */
 147     function onStartShowHTML($action)
 148     {
 149         if ($action instanceof ShowstreamAction) {
 150             $acct = 'acct:'. $action->profile->nickname .'@'. common_config('site', 'server');
 151             $url = common_local_url('userxrd');
 152             $url.= '?uri='. $acct;
 153
 154             header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="application/xrd+xml"');
 155         }
 156     }
 157
 158     /**
 159      * Set up a PuSH hub link to our internal link for canonical timeline
 160      * Atom feeds for users and groups.
 161      */
 162     function onStartApiAtom($feed)
 163     {
 164         $id = null;
 165
 166         if ($feed instanceof AtomUserNoticeFeed) {
 167             $salmonAction = 'usersalmon';
 168             $user = $feed->getUser();
 169             $id   = $user->id;
 170             $profile = $user->getProfile();
 171         } else if ($feed instanceof AtomGroupNoticeFeed) {
 172             $salmonAction = 'groupsalmon';
 173             $group = $feed->getGroup();
 174             $id = $group->id;
 175         } else if ($feed instanceof AtomListNoticeFeed) {
 176             $salmonAction = 'peopletagsalmon';
 177             $peopletag = $feed->getList();
 178             $id = $peopletag->id;
 179         } else {
 180             return true;
 181         }
 182
 183         if (!empty($id)) {
 184             $hub = common_config('ostatus', 'hub');
 185             if (empty($hub)) {
 186                 // Updates will be handled through our internal PuSH hub.
 187                 $hub = common_local_url('pushhub');
 188             }
 189             $feed->addLink($hub, array('rel' => 'hub'));
 190
 191             // Also, we'll add in the salmon link
 192             $salmon = common_local_url($salmonAction, array('id' => $id));
 193             $feed->addLink($salmon, array('rel' => Salmon::REL_SALMON));
 194
 195             // XXX: these are deprecated
 196             $feed->addLink($salmon, array('rel' => Salmon::NS_REPLIES));
 197             $feed->addLink($salmon, array('rel' => Salmon::NS_MENTIONS));
 198         }
 199
 200         return true;
 201     }
 202
 203     /**
 204      * Automatically load the actions and libraries used by the plugin
 205      *
 206      * @param Class $cls the class
 207      *
 208      * @return boolean hook return
 209      *
 210      */
 211     function onAutoload($cls)
 212     {
 213         $base = dirname(__FILE__);
 214         $lower = strtolower($cls);
 215         $map = array('activityverb' => 'activity',
 216                      'activityobject' => 'activity',
 217                      'activityutils' => 'activity');
 218         if (isset($map[$lower])) {
 219             $lower = $map[$lower];
 220         }
 221         $files = array("$base/classes/$cls.php",
 222                        "$base/lib/$lower.php");
 223         if (substr($lower, -6) == 'action') {
 224             $files[] = "$base/actions/" . substr($lower, 0, -6) . ".php";
 225         }
 226         foreach ($files as $file) {
 227             if (file_exists($file)) {
 228                 include_once $file;
 229                 return false;
 230             }
 231         }
 232         return true;
 233     }
 234
 235     /**
 236      * Add in an OStatus subscribe button
 237      */
 238     function onStartProfileRemoteSubscribe($output, $profile)
 239     {
 240         $this->onStartProfileListItemActionElements($output, $profile);
 241         return false;
 242     }
 243
 244     function onStartGroupSubscribe($widget, $group)
 245     {
 246         $cur = common_current_user();
 247
 248         if (empty($cur)) {
 249             $widget->out->elementStart('li', 'entity_subscribe');
 250
 251             $url = common_local_url('ostatusinit',
 252                                     array('group' => $group->nickname));
 253             $widget->out->element('a', array('href' => $url,
 254                                         'class' => 'entity_remote_subscribe'),
 255                                 // TRANS: Link to subscribe to a remote entity.
 256                                 _m('Subscribe'));
 257
 258             $widget->out->elementEnd('li');
 259             return false;
 260         }
 261
 262         return true;
 263     }
 264
 265     function onStartSubscribePeopletagForm($output, $peopletag)
 266     {
 267         $cur = common_current_user();
 268
 269         if (empty($cur)) {
 270             $output->elementStart('li', 'entity_subscribe');
 271             $profile = $peopletag->getTagger();
 272             $url = common_local_url('ostatusinit',
 273                                     array('tagger' => $profile->nickname, 'peopletag' => $peopletag->tag));
 274             $output->element('a', array('href' => $url,
 275                                         'class' => 'entity_remote_subscribe'),
 276                                 // TRANS: Link to subscribe to a remote entity.
 277                                 _m('Subscribe'));
 278
 279             $output->elementEnd('li');
 280             return false;
 281         }
 282
 283         return true;
 284     }
 285
 286     function onStartShowTagProfileForm($action, $profile)
 287     {
 288         $action->elementStart('form', array('method' => 'post',
 289                                            'id' => 'form_tag_user',
 290                                            'class' => 'form_settings',
 291                                            'name' => 'tagprofile',
 292                                            'action' => common_local_url('tagprofile', array('id' => @$profile->id))));
 293
 294         $action->elementStart('fieldset');
 295         // TRANS: Fieldset legend.
 296         $action->element('legend', null, _m('List remote profile'));
 297         $action->hidden('token', common_session_token());
 298
 299         $user = common_current_user();
 300
 301         $action->elementStart('ul', 'form_data');
 302         $action->elementStart('li');
 303
 304         // TRANS: Field label.
 305         $action->input('uri', _m('LABEL','Remote profile'), $action->trimmed('uri'),
 306                      // TRANS: Field title.
 307                      _m('OStatus user\'s address, like nickname@example.com or http://example.net/nickname.'));
 308         $action->elementEnd('li');
 309         $action->elementEnd('ul');
 310         // TRANS: Button text to fetch remote profile.
 311         $action->submit('fetch', _m('BUTTON','Fetch'));
 312         $action->elementEnd('fieldset');
 313         $action->elementEnd('form');
 314     }
 315
 316     function onStartTagProfileAction($action, $profile)
 317     {
 318         $err = null;
 319         $uri = $action->trimmed('uri');
 320
 321         if (!$profile && $uri) {
 322             try {
 323                 if (Validate::email($uri)) {
 324                     $oprofile = Ostatus_profile::ensureWebfinger($uri);
 325                 } else if (Validate::uri($uri)) {
 326                     $oprofile = Ostatus_profile::ensureProfileURL($uri);
 327                 } else {
 328                     // TRANS: Exception in OStatus when invalid URI was entered.
 329                     throw new Exception(_m('Invalid URI.'));
 330                 }
 331
 332                 // redirect to the new profile.
 333                 common_redirect(common_local_url('tagprofile', array('id' => $oprofile->profile_id)), 303);
 334                 return false;
 335
 336             } catch (Exception $e) {
 337                 // TRANS: Error message in OStatus plugin. Do not translate the domain names example.com
 338                 // TRANS: and example.net, as these are official standard domain names for use in examples.
 339                 $err = _m("Sorry, we could not reach that address. Please make sure that the OStatus address is like nickname@example.com or http://example.net/nickname.");
 340             }
 341
 342             $action->showForm($err);
 343             return false;
 344         }
 345         return true;
 346     }
 347
 348     /*
 349      * If the field being looked for is URI look for the profile
 350      */
 351     function onStartProfileCompletionSearch($action, $profile, $search_engine) {
 352         if ($action->field == 'uri') {
 353             $profile->joinAdd(array('id', 'user:id'));
 354             $profile->whereAdd('uri LIKE "%' . $profile->escape($q) . '%"');
 355             $profile->query();
 356
 357             if ($profile->N == 0) {
 358                 try {
 359                     if (Validate::email($q)) {
 360                         $oprofile = Ostatus_profile::ensureWebfinger($q);
 361                     } else if (Validate::uri($q)) {
 362                         $oprofile = Ostatus_profile::ensureProfileURL($q);
 363                     } else {
 364                         // TRANS: Exception in OStatus when invalid URI was entered.
 365                         throw new Exception(_m('Invalid URI.'));
 366                     }
 367                     return $this->filter(array($oprofile->localProfile()));
 368
 369                 } catch (Exception $e) {
 370                 // TRANS: Error message in OStatus plugin. Do not translate the domain names example.com
 371                 // TRANS: and example.net, as these are official standard domain names for use in examples.
 372                     $this->msg = _m("Sorry, we could not reach that address. Please make sure that the OStatus address is like nickname@example.com or http://example.net/nickname.");
 373                     return array();
 374                 }
 375             }
 376             return false;
 377         }
 378         return true;
 379     }
 380
 381     /**
 382      * Find any explicit remote mentions. Accepted forms:
 383      *   Webfinger: @user@example.com
 384      *   Profile link: @example.com/mublog/user
 385      * @param Profile $sender (os user?)
 386      * @param string $text input markup text
 387      * @param array &$mention in/out param: set of found mentions
 388      * @return boolean hook return value
 389      */
 390     function onEndFindMentions($sender, $text, &$mentions)
 391     {
 392         $matches = array();
 393
 394         // Webfinger matches: @user@example.com
 395         if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\-?\w+\.)*\w+(?:\w+\-\w+)*\.\w+)!',
 396                        $text,
 397                        $wmatches,
 398                        PREG_OFFSET_CAPTURE)) {
 399             foreach ($wmatches[1] as $wmatch) {
 400                 list($target, $pos) = $wmatch;
 401                 $this->log(LOG_INFO, "Checking webfinger '$target'");
 402                 try {
 403                     $oprofile = Ostatus_profile::ensureWebfinger($target);
 404                     if ($oprofile && !$oprofile->isGroup()) {
 405                         $profile = $oprofile->localProfile();
 406                         $matches[$pos] = array('mentioned' => array($profile),
 407                                                'text' => $target,
 408                                                'position' => $pos,
 409                                                'url' => $profile->profileurl);
 410                     }
 411                 } catch (Exception $e) {
 412                     $this->log(LOG_ERR, "Webfinger check failed: " . $e->getMessage());
 413                 }
 414             }
 415         }
 416
 417         // Profile matches: @example.com/mublog/user
 418         if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)!',
 419                        $text,
 420                        $wmatches,
 421                        PREG_OFFSET_CAPTURE)) {
 422             foreach ($wmatches[1] as $wmatch) {
 423                 list($target, $pos) = $wmatch;
 424                 $schemes = array('http', 'https');
 425                 foreach ($schemes as $scheme) {
 426                     $url = "$scheme://$target";
 427                     $this->log(LOG_INFO, "Checking profile address '$url'");
 428                     try {
 429                         $oprofile = Ostatus_profile::ensureProfileURL($url);
 430                         if ($oprofile && !$oprofile->isGroup()) {
 431                             $profile = $oprofile->localProfile();
 432                             $matches[$pos] = array('mentioned' => array($profile),
 433                                                    'text' => $target,
 434                                                    'position' => $pos,
 435                                                    'url' => $profile->profileurl);
 436                             break;
 437                         }
 438                     } catch (Exception $e) {
 439                         $this->log(LOG_ERR, "Profile check failed: " . $e->getMessage());
 440                     }
 441                 }
 442             }
 443         }
 444
 445         foreach ($mentions as $i => $other) {
 446             // If we share a common prefix with a local user, override it!
 447             $pos = $other['position'];
 448             if (isset($matches[$pos])) {
 449                 $mentions[$i] = $matches[$pos];
 450                 unset($matches[$pos]);
 451             }
 452         }
 453         foreach ($matches as $mention) {
 454             $mentions[] = $mention;
 455         }
 456
 457         return true;
 458     }
 459
 460     /**
 461      * Allow remote profile references to be used in commands:
 462      *   sub update@status.net
 463      *   whois evan@identi.ca
 464      *   reply http://identi.ca/evan hey what's up
 465      *
 466      * @param Command $command
 467      * @param string $arg
 468      * @param Profile &$profile
 469      * @return hook return code
 470      */
 471     function onStartCommandGetProfile($command, $arg, &$profile)
 472     {
 473         $oprofile = $this->pullRemoteProfile($arg);
 474         if ($oprofile && !$oprofile->isGroup()) {
 475             $profile = $oprofile->localProfile();
 476             return false;
 477         } else {
 478             return true;
 479         }
 480     }
 481
 482     /**
 483      * Allow remote group references to be used in commands:
 484      *   join group+statusnet@identi.ca
 485      *   join http://identi.ca/group/statusnet
 486      *   drop identi.ca/group/statusnet
 487      *
 488      * @param Command $command
 489      * @param string $arg
 490      * @param User_group &$group
 491      * @return hook return code
 492      */
 493     function onStartCommandGetGroup($command, $arg, &$group)
 494     {
 495         $oprofile = $this->pullRemoteProfile($arg);
 496         if ($oprofile && $oprofile->isGroup()) {
 497             $group = $oprofile->localGroup();
 498             return false;
 499         } else {
 500             return true;
 501         }
 502     }
 503
 504     protected function pullRemoteProfile($arg)
 505     {
 506         $oprofile = null;
 507         if (preg_match('!^((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)$!', $arg)) {
 508             // webfinger lookup
 509             try {
 510                 return Ostatus_profile::ensureWebfinger($arg);
 511             } catch (Exception $e) {
 512                 common_log(LOG_ERR, 'Webfinger lookup failed for ' .
 513                                     $arg . ': ' . $e->getMessage());
 514             }
 515         }
 516
 517         // Look for profile URLs, with or without scheme:
 518         $urls = array();
 519         if (preg_match('!^https?://((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)$!', $arg)) {
 520             $urls[] = $arg;
 521         }
 522         if (preg_match('!^((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)$!', $arg)) {
 523             $schemes = array('http', 'https');
 524             foreach ($schemes as $scheme) {
 525                 $urls[] = "$scheme://$arg";
 526             }
 527         }
 528
 529         foreach ($urls as $url) {
 530             try {
 531                 return Ostatus_profile::ensureProfileURL($url);
 532             } catch (Exception $e) {
 533                 common_log(LOG_ERR, 'Profile lookup failed for ' .
 534                                     $arg . ': ' . $e->getMessage());
 535             }
 536         }
 537         return null;
 538     }
 539
 540     /**
 541      * Make sure necessary tables are filled out.
 542      */
 543     function onCheckSchema() {
 544         $schema = Schema::get();
 545         $schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
 546         $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
 547         $schema->ensureTable('feedsub', FeedSub::schemaDef());
 548         $schema->ensureTable('hubsub', HubSub::schemaDef());
 549         $schema->ensureTable('magicsig', Magicsig::schemaDef());
 550         return true;
 551     }
 552
 553     function onEndShowStatusNetStyles($action) {
 554         $action->cssLink($this->path('theme/base/css/ostatus.css'));
 555         return true;
 556     }
 557
 558     function onEndShowStatusNetScripts($action) {
 559         $action->script($this->path('js/ostatus.js'));
 560         return true;
 561     }
 562
 563     /**
 564      * Override the "from ostatus" bit in notice lists to link to the
 565      * original post and show the domain it came from.
 566      *
 567      * @param Notice in $notice
 568      * @param string out &$name
 569      * @param string out &$url
 570      * @param string out &$title
 571      * @return mixed hook return code
 572      */
 573     function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
 574     {
 575         if ($notice->source == 'ostatus') {
 576             if ($notice->url) {
 577                 $bits = parse_url($notice->url);
 578                 $domain = $bits['host'];
 579                 if (substr($domain, 0, 4) == 'www.') {
 580                     $name = substr($domain, 4);
 581                 } else {
 582                     $name = $domain;
 583                 }
 584
 585                 $url = $notice->url;
 586                 // TRANS: Title. %s is a domain name.
 587                 $title = sprintf(_m('Sent from %s via OStatus'), $domain);
 588                 return false;
 589             }
 590         }
 591     return true;
 592     }
 593
 594     /**
 595      * Send incoming PuSH feeds for OStatus endpoints in for processing.
 596      *
 597      * @param FeedSub $feedsub
 598      * @param DOMDocument $feed
 599      * @return mixed hook return code
 600      */
 601     function onStartFeedSubReceive($feedsub, $feed)
 602     {
 603         $oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
 604         if ($oprofile) {
 605             $oprofile->processFeed($feed, 'push');
 606         } else {
 607             common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
 608         }
 609     }
 610
 611     /**
 612      * Tell the FeedSub infrastructure whether we have any active OStatus
 613      * usage for the feed; if not it'll be able to garbage-collect the
 614      * feed subscription.
 615      *
 616      * @param FeedSub $feedsub
 617      * @param integer $count in/out
 618      * @return mixed hook return code
 619      */
 620     function onFeedSubSubscriberCount($feedsub, &$count)
 621     {
 622         $oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
 623         if ($oprofile) {
 624             $count += $oprofile->subscriberCount();
 625         }
 626         return true;
 627     }
 628
 629     /**
 630      * When about to subscribe to a remote user, start a server-to-server
 631      * PuSH subscription if needed. If we can't establish that, abort.
 632      *
 633      * @fixme If something else aborts later, we could end up with a stray
 634      *        PuSH subscription. This is relatively harmless, though.
 635      *
 636      * @param Profile $subscriber
 637      * @param Profile $other
 638      *
 639      * @return hook return code
 640      *
 641      * @throws Exception
 642      */
 643     function onStartSubscribe($subscriber, $other)
 644     {
 645         $user = User::staticGet('id', $subscriber->id);
 646
 647         if (empty($user)) {
 648             return true;
 649         }
 650
 651         $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
 652
 653         if (empty($oprofile)) {
 654             return true;
 655         }
 656
 657         if (!$oprofile->subscribe()) {
 658             // TRANS: Exception thrown when setup of remote subscription fails.
 659             throw new Exception(_m('Could not set up remote subscription.'));
 660         }
 661     }
 662
 663     /**
 664      * Having established a remote subscription, send a notification to the
 665      * remote OStatus profile's endpoint.
 666      *
 667      * @param Profile $subscriber
 668      * @param Profile $other
 669      *
 670      * @return hook return code
 671      *
 672      * @throws Exception
 673      */
 674     function onEndSubscribe($subscriber, $other)
 675     {
 676         $user = User::staticGet('id', $subscriber->id);
 677
 678         if (empty($user)) {
 679             return true;
 680         }
 681
 682         $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
 683
 684         if (empty($oprofile)) {
 685             return true;
 686         }
 687
 688         $sub = Subscription::pkeyGet(array('subscriber' => $subscriber->id,
 689                                            'subscribed' => $other->id));
 690
 691         $act = $sub->asActivity();
 692
 693         $oprofile->notifyActivity($act, $subscriber);
 694
 695         return true;
 696     }
 697
 698     /**
 699      * Notify remote server and garbage collect unused feeds on unsubscribe.
 700      * @todo FIXME: Send these operations to background queues
 701      *
 702      * @param User $user
 703      * @param Profile $other
 704      * @return hook return value
 705      */
 706     function onEndUnsubscribe($profile, $other)
 707     {
 708         $user = User::staticGet('id', $profile->id);
 709
 710         if (empty($user)) {
 711             return true;
 712         }
 713
 714         $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
 715
 716         if (empty($oprofile)) {
 717             return true;
 718         }
 719
 720         // Drop the PuSH subscription if there are no other subscribers.
 721         $oprofile->garbageCollect();
 722
 723         $act = new Activity();
 724
 725         $act->verb = ActivityVerb::UNFOLLOW;
 726
 727         $act->id   = TagURI::mint('unfollow:%d:%d:%s',
 728                                   $profile->id,
 729                                   $other->id,
 730                                   common_date_iso8601(time()));
 731
 732         $act->time    = time();
 733         // TRANS: Title for unfollowing a remote profile.
 734         $act->title   = _m('TITLE','Unfollow');
 735         // TRANS: Success message for unsubscribe from user attempt through OStatus.
 736         // TRANS: %1$s is the unsubscriber's name, %2$s is the unsubscribed user's name.
 737         $act->content = sprintf(_m('%1$s stopped following %2$s.'),
 738                                $profile->getBestName(),
 739                                $other->getBestName());
 740
 741         $act->actor   = ActivityObject::fromProfile($profile);
 742         $act->object  = ActivityObject::fromProfile($other);
 743
 744         $oprofile->notifyActivity($act, $profile);
 745
 746         return true;
 747     }
 748
 749     /**
 750      * When one of our local users tries to join a remote group,
 751      * notify the remote server. If the notification is rejected,
 752      * deny the join.
 753      *
 754      * @param User_group $group
 755      * @param User $user
 756      *
 757      * @return mixed hook return value
 758      */
 759     function onStartJoinGroup($group, $user)
 760     {
 761         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
 762         if ($oprofile) {
 763             if (!$oprofile->subscribe()) {
 764                 // TRANS: Exception thrown when setup of remote group membership fails.
 765                 throw new Exception(_m('Could not set up remote group membership.'));
 766             }
 767
 768             // NOTE: we don't use Group_member::asActivity() since that record
 769             // has not yet been created.
 770
 771             $member = Profile::staticGet($user->id);
 772
 773             $act = new Activity();
 774             $act->id = TagURI::mint('join:%d:%d:%s',
 775                                     $member->id,
 776                                     $group->id,
 777                                     common_date_iso8601(time()));
 778
 779             $act->actor = ActivityObject::fromProfile($member);
 780             $act->verb = ActivityVerb::JOIN;
 781             $act->object = $oprofile->asActivityObject();
 782
 783             $act->time = time();
 784             // TRANS: Title for joining a remote groep.
 785             $act->title = _m('TITLE','Join');
 786             // TRANS: Success message for subscribe to group attempt through OStatus.
 787             // TRANS: %1$s is the member name, %2$s is the subscribed group's name.
 788             $act->content = sprintf(_m('%1$s has joined group %2$s.'),
 789                                     $member->getBestName(),
 790                                     $oprofile->getBestName());
 791
 792             if ($oprofile->notifyActivity($act, $member)) {
 793                 return true;
 794             } else {
 795                 $oprofile->garbageCollect();
 796                 // TRANS: Exception thrown when joining a remote group fails.
 797                 throw new Exception(_m('Failed joining remote group.'));
 798             }
 799         }
 800     }
 801
 802     /**
 803      * When one of our local users leaves a remote group, notify the remote
 804      * server.
 805      *
 806      * @fixme Might be good to schedule a resend of the leave notification
 807      * if it failed due to a transitory error. We've canceled the local
 808      * membership already anyway, but if the remote server comes back up
 809      * it'll be left with a stray membership record.
 810      *
 811      * @param User_group $group
 812      * @param Profile $user
 813      *
 814      * @return mixed hook return value
 815      */
 816     function onEndLeaveGroup($group, $user)
 817     {
 818         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
 819         if ($oprofile) {
 820             // Drop the PuSH subscription if there are no other subscribers.
 821             $oprofile->garbageCollect();
 822
 823             $member = Profile::staticGet($user->id);
 824
 825             $act = new Activity();
 826             $act->id = TagURI::mint('leave:%d:%d:%s',
 827                                     $member->id,
 828                                     $group->id,
 829                                     common_date_iso8601(time()));
 830
 831             $act->actor = ActivityObject::fromProfile($member);
 832             $act->verb = ActivityVerb::LEAVE;
 833             $act->object = $oprofile->asActivityObject();
 834
 835             $act->time = time();
 836             // TRANS: Title for leaving a remote group.
 837             $act->title = _m('TITLE','Leave');
 838             // TRANS: Success message for unsubscribe from group attempt through OStatus.
 839             // TRANS: %1$s is the member name, %2$s is the unsubscribed group's name.
 840             $act->content = sprintf(_m('%1$s has left group %2$s.'),
 841                                     $member->getBestName(),
 842                                     $oprofile->getBestName());
 843
 844             $oprofile->notifyActivity($act, $member);
 845         }
 846     }
 847
 848     /**
 849      * When one of our local users tries to subscribe to a remote peopletag,
 850      * notify the remote server. If the notification is rejected,
 851      * deny the subscription.
 852      *
 853      * @param Profile_list $peopletag
 854      * @param User         $user
 855      *
 856      * @return mixed hook return value
 857      */
 858
 859     function onStartSubscribePeopletag($peopletag, $user)
 860     {
 861         $oprofile = Ostatus_profile::staticGet('peopletag_id', $peopletag->id);
 862         if ($oprofile) {
 863             if (!$oprofile->subscribe()) {
 864                 // TRANS: Exception thrown when setup of remote list subscription fails.
 865                 throw new Exception(_m('Could not set up remote list subscription.'));
 866             }
 867
 868             $sub = $user->getProfile();
 869             $tagger = Profile::staticGet($peopletag->tagger);
 870
 871             $act = new Activity();
 872             $act->id = TagURI::mint('subscribe_peopletag:%d:%d:%s',
 873                                     $sub->id,
 874                                     $peopletag->id,
 875                                     common_date_iso8601(time()));
 876
 877             $act->actor = ActivityObject::fromProfile($sub);
 878             $act->verb = ActivityVerb::FOLLOW;
 879             $act->object = $oprofile->asActivityObject();
 880
 881             $act->time = time();
 882             // TRANS: Title for following a remote list.
 883             $act->title = _m('TITLE','Follow list');
 884             // TRANS: Success message for remote list follow through OStatus.
 885             // TRANS: %1$s is the subscriber name, %2$s is the list, %3$s is the lister's name.
 886             $act->content = sprintf(_m('%1$s is now following people listed in %2$s by %3$s.'),
 887                                     $sub->getBestName(),
 888                                     $oprofile->getBestName(),
 889                                     $tagger->getBestName());
 890
 891             if ($oprofile->notifyActivity($act, $sub)) {
 892                 return true;
 893             } else {
 894                 $oprofile->garbageCollect();
 895                 // TRANS: Exception thrown when subscription to remote list fails.
 896                 throw new Exception(_m('Failed subscribing to remote list.'));
 897             }
 898         }
 899     }
 900
 901     /**
 902      * When one of our local users unsubscribes to a remote peopletag, notify the remote
 903      * server.
 904      *
 905      * @param Profile_list $peopletag
 906      * @param User         $user
 907      *
 908      * @return mixed hook return value
 909      */
 910
 911     function onEndUnsubscribePeopletag($peopletag, $user)
 912     {
 913         $oprofile = Ostatus_profile::staticGet('peopletag_id', $peopletag->id);
 914         if ($oprofile) {
 915             // Drop the PuSH subscription if there are no other subscribers.
 916             $oprofile->garbageCollect();
 917
 918             $sub = Profile::staticGet($user->id);
 919             $tagger = Profile::staticGet($peopletag->tagger);
 920
 921             $act = new Activity();
 922             $act->id = TagURI::mint('unsubscribe_peopletag:%d:%d:%s',
 923                                     $sub->id,
 924                                     $peopletag->id,
 925                                     common_date_iso8601(time()));
 926
 927             $act->actor = ActivityObject::fromProfile($member);
 928             $act->verb = ActivityVerb::UNFOLLOW;
 929             $act->object = $oprofile->asActivityObject();
 930
 931             $act->time = time();
 932             // TRANS: Title for unfollowing a remote list.
 933             $act->title = _m('Unfollow list');
 934             // TRANS: Success message for remote list unfollow through OStatus.
 935             // TRANS: %1$s is the subscriber name, %2$s is the list, %3$s is the lister's name.
 936             $act->content = sprintf(_m('%1$s stopped following the list %2$s by %3$s.'),
 937                                     $sub->getBestName(),
 938                                     $oprofile->getBestName(),
 939                                     $tagger->getBestName());
 940
 941             $oprofile->notifyActivity($act, $user);
 942         }
 943     }
 944
 945     /**
 946      * Notify remote users when their notices get favorited.
 947      *
 948      * @param Profile or User $profile of local user doing the faving
 949      * @param Notice $notice being favored
 950      * @return hook return value
 951      */
 952     function onEndFavorNotice(Profile $profile, Notice $notice)
 953     {
 954         $user = User::staticGet('id', $profile->id);
 955
 956         if (empty($user)) {
 957             return true;
 958         }
 959
 960         $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
 961
 962         if (empty($oprofile)) {
 963             return true;
 964         }
 965
 966         $fav = Fave::pkeyGet(array('user_id' => $user->id,
 967                                    'notice_id' => $notice->id));
 968
 969         if (empty($fav)) {
 970             // That's weird.
 971             return true;
 972         }
 973
 974         $act = $fav->asActivity();
 975
 976         $oprofile->notifyActivity($act, $profile);
 977
 978         return true;
 979     }
 980
 981     /**
 982      * Notify remote user it has got a new people tag
 983      *   - tag verb is queued
 984      *   - the subscription is done immediately if not present
 985      *
 986      * @param Profile_tag $ptag the people tag that was created
 987      * @return hook return value
 988      */
 989     function onEndTagProfile($ptag)
 990     {
 991         $oprofile = Ostatus_profile::staticGet('profile_id', $ptag->tagged);
 992
 993         if (empty($oprofile)) {
 994             return true;
 995         }
 996
 997         $plist = $ptag->getMeta();
 998         if ($plist->private) {
 999             return true;
1000         }
1001
1002         $act = new Activity();
1003
1004         $tagger = $plist->getTagger();
1005         $tagged = Profile::staticGet('id', $ptag->tagged);
1006
1007         $act->verb = ActivityVerb::TAG;
1008         $act->id   = TagURI::mint('tag_profile:%d:%d:%s',
1009                                   $plist->tagger, $plist->id,
1010                                   common_date_iso8601(time()));
1011         $act->time = time();
1012         // TRANS: Title for listing a remote profile.
1013         $act->title = _m('TITLE','List');
1014         // TRANS: Success message for remote list addition through OStatus.
1015         // TRANS: %1$s is the list creator's name, %2$s is the added list member, %3$s is the list name.
1016         $act->content = sprintf(_m('%1$s listed %2$s in the list %3$s.'),
1017                                 $tagger->getBestName(),
1018                                 $tagged->getBestName(),
1019                                 $plist->getBestName());
1020
1021         $act->actor  = ActivityObject::fromProfile($tagger);
1022         $act->objects = array(ActivityObject::fromProfile($tagged));
1023         $act->target = ActivityObject::fromPeopletag($plist);
1024
1025         $oprofile->notifyDeferred($act, $tagger);
1026
1027         // initiate a PuSH subscription for the person being tagged
1028         if (!$oprofile->subscribe()) {
1029             // TRANS: Exception thrown when subscribing to a remote list fails.
1030             throw new Exception(sprintf(_m('Could not complete subscription to remote '.
1031                                           'profile\'s feed. List %s could not be saved.'), $ptag->tag));
1032             return false;
1033         }
1034         return true;
1035     }
1036
1037     /**
1038      * Notify remote user that a people tag has been removed
1039      *   - untag verb is queued
1040      *   - the subscription is undone immediately if not required
1041      *     i.e garbageCollect()'d
1042      *
1043      * @param Profile_tag $ptag the people tag that was deleted
1044      * @return hook return value
1045      */
1046     function onEndUntagProfile($ptag)
1047     {
1048         $oprofile = Ostatus_profile::staticGet('profile_id', $ptag->tagged);
1049
1050         if (empty($oprofile)) {
1051             return true;
1052         }
1053
1054         $plist = $ptag->getMeta();
1055         if ($plist->private) {
1056             return true;
1057         }
1058
1059         $act = new Activity();
1060
1061         $tagger = $plist->getTagger();
1062         $tagged = Profile::staticGet('id', $ptag->tagged);
1063
1064         $act->verb = ActivityVerb::UNTAG;
1065         $act->id   = TagURI::mint('untag_profile:%d:%d:%s',
1066                                   $plist->tagger, $plist->id,
1067                                   common_date_iso8601(time()));
1068         $act->time = time();
1069         // TRANS: Title for unlisting a remote profile.
1070         $act->title = _m('TITLE','Unlist');
1071         // TRANS: Success message for remote list removal through OStatus.
1072         // TRANS: %1$s is the list creator's name, %2$s is the removed list member, %3$s is the list name.
1073         $act->content = sprintf(_m('%1$s removed %2$s from the list %3$s.'),
1074                                 $tagger->getBestName(),
1075                                 $tagged->getBestName(),
1076                                 $plist->getBestName());
1077
1078         $act->actor  = ActivityObject::fromProfile($tagger);
1079         $act->objects = array(ActivityObject::fromProfile($tagged));
1080         $act->target = ActivityObject::fromPeopletag($plist);
1081
1082         $oprofile->notifyDeferred($act, $tagger);
1083
1084         // unsubscribe to PuSH feed if no more required
1085         $oprofile->garbageCollect();
1086
1087         return true;
1088     }
1089
1090     /**
1091      * Notify remote users when their notices get de-favorited.
1092      *
1093      * @param Profile $profile Profile person doing the de-faving
1094      * @param Notice  $notice  Notice being favored
1095      *
1096      * @return hook return value
1097      */
1098     function onEndDisfavorNotice(Profile $profile, Notice $notice)
1099     {
1100         $user = User::staticGet('id', $profile->id);
1101
1102         if (empty($user)) {
1103             return true;
1104         }
1105
1106         $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
1107
1108         if (empty($oprofile)) {
1109             return true;
1110         }
1111
1112         $act = new Activity();
1113
1114         $act->verb = ActivityVerb::UNFAVORITE;
1115         $act->id   = TagURI::mint('disfavor:%d:%d:%s',
1116                                   $profile->id,
1117                                   $notice->id,
1118                                   common_date_iso8601(time()));
1119         $act->time    = time();
1120         // TRANS: Title for unliking a remote notice.
1121         $act->title   = _m('Unlike');
1122         // TRANS: Success message for remove a favorite notice through OStatus.
1123         // TRANS: %1$s is the unfavoring user's name, %2$s is URI to the no longer favored notice.
1124         $act->content = sprintf(_m('%1$s no longer likes %2$s.'),
1125                                $profile->getBestName(),
1126                                $notice->uri);
1127
1128         $act->actor   = ActivityObject::fromProfile($profile);
1129         $act->object  = ActivityObject::fromNotice($notice);
1130
1131         $oprofile->notifyActivity($act, $profile);
1132
1133         return true;
1134     }
1135
1136     function onStartGetProfileUri($profile, &$uri)
1137     {
1138         $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
1139         if (!empty($oprofile)) {
1140             $uri = $oprofile->uri;
1141             return false;
1142         }
1143         return true;
1144     }
1145
1146     function onStartUserGroupHomeUrl($group, &$url)
1147     {
1148         return $this->onStartUserGroupPermalink($group, $url);
1149     }
1150
1151     function onStartUserGroupPermalink($group, &$url)
1152     {
1153         $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
1154         if ($oprofile) {
1155             // @fixme this should probably be in the user_group table
1156             // @fixme this uri not guaranteed to be a profile page
1157             $url = $oprofile->uri;
1158             return false;
1159         }
1160     }
1161
1162     function onStartShowSubscriptionsContent($action)
1163     {
1164         $this->showEntityRemoteSubscribe($action);
1165
1166         return true;
1167     }
1168
1169     function onStartShowUserGroupsContent($action)
1170     {
1171         $this->showEntityRemoteSubscribe($action, 'ostatusgroup');
1172
1173         return true;
1174     }
1175
1176     function onEndShowSubscriptionsMiniList($action)
1177     {
1178         $this->showEntityRemoteSubscribe($action);
1179
1180         return true;
1181     }
1182
1183     function onEndShowGroupsMiniList($action)
1184     {
1185         $this->showEntityRemoteSubscribe($action, 'ostatusgroup');
1186
1187         return true;
1188     }
1189
1190     function showEntityRemoteSubscribe($action, $target='ostatussub')
1191     {
1192         $user = common_current_user();
1193         if ($user && ($user->id == $action->profile->id)) {
1194             $action->elementStart('div', 'entity_actions');
1195             $action->elementStart('p', array('id' => 'entity_remote_subscribe',
1196                                              'class' => 'entity_subscribe'));
1197             $action->element('a', array('href' => common_local_url($target),
1198                                         'class' => 'entity_remote_subscribe'),
1199                                 // TRANS: Link text for link to remote subscribe.
1200                                 _m('Remote'));
1201             $action->elementEnd('p');
1202             $action->elementEnd('div');
1203         }
1204     }
1205
1206     /**
1207      * Ping remote profiles with updates to this profile.
1208      * Salmon pings are queued for background processing.
1209      */
1210     function onEndBroadcastProfile(Profile $profile)
1211     {
1212         $user = User::staticGet('id', $profile->id);
1213
1214         // Find foreign accounts I'm subscribed to that support Salmon pings.
1215         //
1216         // @fixme we could run updates through the PuSH feed too,
1217         // in which case we can skip Salmon pings to folks who
1218         // are also subscribed to me.
1219         $sql = "SELECT * FROM ostatus_profile " .
1220                "WHERE profile_id IN " .
1221                "(SELECT subscribed FROM subscription WHERE subscriber=%d) " .
1222                "OR group_id IN " .
1223                "(SELECT group_id FROM group_member WHERE profile_id=%d)";
1224         $oprofile = new Ostatus_profile();
1225         $oprofile->query(sprintf($sql, $profile->id, $profile->id));
1226
1227         if ($oprofile->N == 0) {
1228             common_log(LOG_DEBUG, "No OStatus remote subscribees for $profile->nickname");
1229             return true;
1230         }
1231
1232         $act = new Activity();
1233
1234         $act->verb = ActivityVerb::UPDATE_PROFILE;
1235         $act->id   = TagURI::mint('update-profile:%d:%s',
1236                                   $profile->id,
1237                                   common_date_iso8601(time()));
1238         $act->time    = time();
1239         // TRANS: Title for activity.
1240         $act->title   = _m('Profile update');
1241         // TRANS: Ping text for remote profile update through OStatus.
1242         // TRANS: %s is user that updated their profile.
1243         $act->content = sprintf(_m('%s has updated their profile page.'),
1244                                $profile->getBestName());
1245
1246         $act->actor   = ActivityObject::fromProfile($profile);
1247         $act->object  = $act->actor;
1248
1249         while ($oprofile->fetch()) {
1250             $oprofile->notifyDeferred($act, $profile);
1251         }
1252
1253         return true;
1254     }
1255
1256     function onStartProfileListItemActionElements($item, $profile=null)
1257     {
1258         if (!common_logged_in()) {
1259
1260             $profileUser = User::staticGet('id', $item->profile->id);
1261
1262             if (!empty($profileUser)) {
1263
1264                 if ($item instanceof Action) {
1265                     $output = $item;
1266                     $profile = $item->profile;
1267                 } else {
1268                     $output = $item->out;
1269                 }
1270
1271                 // Add an OStatus subscribe
1272                 $output->elementStart('li', 'entity_subscribe');
1273                 $url = common_local_url('ostatusinit',
1274                                         array('nickname' => $profileUser->nickname));
1275                 $output->element('a', array('href' => $url,
1276                                             'class' => 'entity_remote_subscribe'),
1277                                   // TRANS: Link text for a user to subscribe to an OStatus user.
1278                                  _m('Subscribe'));
1279                 $output->elementEnd('li');
1280
1281                 $output->elementStart('li', 'entity_tag');
1282                 $url = common_local_url('ostatustag',
1283                                         array('nickname' => $profileUser->nickname));
1284                 $output->element('a', array('href' => $url,
1285                                             'class' => 'entity_remote_tag'),
1286                                   // TRANS: Link text for a user to list an OStatus user.
1287                                  _m('List'));
1288                 $output->elementEnd('li');
1289             }
1290         }
1291
1292         return true;
1293     }
1294
1295     function onPluginVersion(&$versions)
1296     {
1297         $versions[] = array('name' => 'OStatus',
1298                             'version' => STATUSNET_VERSION,
1299                             'author' => 'Evan Prodromou, James Walker, Brion Vibber, Zach Copley',
1300                             'homepage' => 'http://status.net/wiki/Plugin:OStatus',
1301                             // TRANS: Plugin description.
1302                             'rawdescription' => _m('Follow people across social networks that implement '.
1303                                '<a href="http://ostatus.org/">OStatus</a>.'));
1304
1305         return true;
1306     }
1307
1308     /**
1309      * Utility function to check if the given URI is a canonical group profile
1310      * page, and if so return the ID number.
1311      *
1312      * @param string $url
1313      * @return mixed int or false
1314      */
1315     public static function localGroupFromUrl($url)
1316     {
1317         $group = User_group::staticGet('uri', $url);
1318         if ($group) {
1319             $local = Local_group::staticGet('group_id', $group->id);
1320             if ($local) {
1321                 return $group->id;
1322             }
1323         } else {
1324             // To find local groups which haven't had their uri fields filled out...
1325             // If the domain has changed since a subscriber got the URI, it'll
1326             // be broken.
1327             $template = common_local_url('groupbyid', array('id' => '31337'));
1328             $template = preg_quote($template, '/');
1329             $template = str_replace('31337', '(\d+)', $template);
1330             if (preg_match("/$template/", $url, $matches)) {
1331                 return intval($matches[1]);
1332             }
1333         }
1334         return false;
1335     }
1336
1337     public function onStartProfileGetAtomFeed($profile, &$feed)
1338     {
1339         $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
1340
1341         if (empty($oprofile)) {
1342             return true;
1343         }
1344
1345         $feed = $oprofile->feeduri;
1346         return false;
1347     }
1348
1349     function onStartGetProfileFromURI($uri, &$profile)
1350     {
1351         // Don't want to do Web-based discovery on our own server,
1352         // so we check locally first.
1353
1354         $user = User::staticGet('uri', $uri);
1355
1356         if (!empty($user)) {
1357             $profile = $user->getProfile();
1358             return false;
1359         }
1360
1361         // Now, check remotely
1362
1363         $oprofile = Ostatus_profile::ensureProfileURI($uri);
1364
1365         if (!empty($oprofile)) {
1366             $profile = $oprofile->localProfile();
1367             return false;
1368         }
1369
1370         // Still not a hit, so give up.
1371
1372         return true;
1373     }
1374
1375     function onEndXrdActionLinks(&$xrd, $user)
1376     {
1377         $xrd->links[] = array('rel' => Discovery::UPDATESFROM,
1378                   'href' => common_local_url('ApiTimelineUser',
1379                              array('id' => $user->id,
1380                                    'format' => 'atom')),
1381                   'type' => 'application/atom+xml');
1382
1383                 // Salmon
1384         $salmon_url = common_local_url('usersalmon',
1385                                        array('id' => $user->id));
1386
1387         $xrd->links[] = array('rel' => Salmon::REL_SALMON,
1388                               'href' => $salmon_url);
1389         // XXX : Deprecated - to be removed.
1390         $xrd->links[] = array('rel' => Salmon::NS_REPLIES,
1391                               'href' => $salmon_url);
1392
1393         $xrd->links[] = array('rel' => Salmon::NS_MENTIONS,
1394                               'href' => $salmon_url);
1395
1396         // Get this user's keypair
1397         $magickey = Magicsig::staticGet('user_id', $user->id);
1398         if (!$magickey) {
1399             // No keypair yet, let's generate one.
1400             $magickey = new Magicsig();
1401             $magickey->generate($user->id);
1402         }
1403
1404         $xrd->links[] = array('rel' => Magicsig::PUBLICKEYREL,
1405                               'href' => 'data:application/magic-public-key,'. $magickey->toString(false));
1406
1407         // TODO - finalize where the redirect should go on the publisher
1408         $url = common_local_url('ostatussub') . '?profile={uri}';
1409         $xrd->links[] = array('rel' => 'http://ostatus.org/schema/1.0/subscribe',
1410                               'template' => $url );
1411
1412         return true;
1413     }
1414 }