lib/activityobject.php

   1 <?php
   2 /**
   3  * StatusNet, the distributed open-source microblogging tool
   4  *
   5  * An activity
   6  *
   7  * PHP version 5
   8  *
   9  * LICENCE: This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU Affero General Public License as published by
  11  * the Free Software Foundation, either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU Affero General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Affero General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  *
  22  * @category  Feed
  23  * @package   StatusNet
  24  * @author    Evan Prodromou <evan@status.net>
  25  * @author    Zach Copley <zach@status.net>
  26  * @copyright 2010 StatusNet, Inc.
  27  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
  28  * @link      http://status.net/
  29  */
  30
  31 if (!defined('STATUSNET')) {
  32     exit(1);
  33 }
  34
  35 /**
  36  * A noun-ish thing in the activity universe
  37  *
  38  * The activity streams spec talks about activity objects, while also having
  39  * a tag activity:object, which is in fact an activity object. Aaaaaah!
  40  *
  41  * This is just a thing in the activity universe. Can be the subject, object,
  42  * or indirect object (target!) of an activity verb. Rotten name, and I'm
  43  * propagating it. *sigh*
  44  *
  45  * @category  OStatus
  46  * @package   StatusNet
  47  * @author    Evan Prodromou <evan@status.net>
  48  * @copyright 2010 StatusNet, Inc.
  49  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
  50  * @link      http://status.net/
  51  */
  52 class ActivityObject
  53 {
  54     const ARTICLE   = 'http://activitystrea.ms/schema/1.0/article';
  55     const BLOGENTRY = 'http://activitystrea.ms/schema/1.0/blog-entry';
  56     const NOTE      = 'http://activitystrea.ms/schema/1.0/note';
  57     const STATUS    = 'http://activitystrea.ms/schema/1.0/status';
  58     const FILE      = 'http://activitystrea.ms/schema/1.0/file';
  59     const PHOTO     = 'http://activitystrea.ms/schema/1.0/photo';
  60     const ALBUM     = 'http://activitystrea.ms/schema/1.0/photo-album';
  61     const PLAYLIST  = 'http://activitystrea.ms/schema/1.0/playlist';
  62     const VIDEO     = 'http://activitystrea.ms/schema/1.0/video';
  63     const AUDIO     = 'http://activitystrea.ms/schema/1.0/audio';
  64     const BOOKMARK  = 'http://activitystrea.ms/schema/1.0/bookmark';
  65     const PERSON    = 'http://activitystrea.ms/schema/1.0/person';
  66     const GROUP     = 'http://activitystrea.ms/schema/1.0/group';
  67     const _LIST     = 'http://activitystrea.ms/schema/1.0/list'; // LIST is reserved
  68     const PLACE     = 'http://activitystrea.ms/schema/1.0/place';
  69     const COMMENT   = 'http://activitystrea.ms/schema/1.0/comment';
  70     // ^^^^^^^^^^ tea!
  71     const ACTIVITY = 'http://activitystrea.ms/schema/1.0/activity';
  72
  73     // Atom elements we snarf
  74
  75     const TITLE   = 'title';
  76     const SUMMARY = 'summary';
  77     const ID      = 'id';
  78     const SOURCE  = 'source';
  79
  80     const NAME  = 'name';
  81     const URI   = 'uri';
  82     const EMAIL = 'email';
  83
  84     const POSTEROUS   = 'http://posterous.com/help/rss/1.0';
  85     const AUTHOR      = 'author';
  86     const USERIMAGE   = 'userImage';
  87     const PROFILEURL  = 'profileUrl';
  88     const NICKNAME    = 'nickName';
  89     const DISPLAYNAME = 'displayName';
  90
  91     public $element;
  92     public $type;
  93     public $id;
  94     public $title;
  95     public $summary;
  96     public $content;
  97     public $owner;
  98     public $link;
  99     public $source;
 100     public $avatarLinks = array();
 101     public $geopoint;
 102     public $poco;
 103     public $displayName;
 104
 105     // @todo move this stuff to it's own PHOTO activity object
 106     const MEDIA_DESCRIPTION = 'description';
 107
 108     public $thumbnail;
 109     public $largerImage;
 110     public $description;
 111     public $extra = array();
 112
 113     /**
 114      * Constructor
 115      *
 116      * This probably needs to be refactored
 117      * to generate a local class (ActivityPerson, ActivityFile, ...)
 118      * based on the object type.
 119      *
 120      * @param DOMElement $element DOM thing to turn into an Activity thing
 121      */
 122     function __construct($element = null)
 123     {
 124         if (empty($element)) {
 125             return;
 126         }
 127
 128         $this->element = $element;
 129
 130         $this->geopoint = $this->_childContent(
 131             $element,
 132             ActivityContext::POINT,
 133             ActivityContext::GEORSS
 134         );
 135
 136         if ($element->tagName == 'author') {
 137             $this->_fromAuthor($element);
 138         } else if ($element->tagName == 'item') {
 139             $this->_fromRssItem($element);
 140         } else {
 141             $this->_fromAtomEntry($element);
 142         }
 143
 144         // Some per-type attributes...
 145         if ($this->type == self::PERSON || $this->type == self::GROUP) {
 146             $this->displayName = $this->title;
 147
 148             $photos = ActivityUtils::getLinks($element, 'photo');
 149             if (count($photos)) {
 150                 foreach ($photos as $link) {
 151                     $this->avatarLinks[] = new AvatarLink($link);
 152                 }
 153             } else {
 154                 $avatars = ActivityUtils::getLinks($element, 'avatar');
 155                 foreach ($avatars as $link) {
 156                     $this->avatarLinks[] = new AvatarLink($link);
 157                 }
 158             }
 159
 160             $this->poco = new PoCo($element);
 161         }
 162
 163         if ($this->type == self::PHOTO) {
 164
 165             $this->thumbnail   = ActivityUtils::getLink($element, 'preview');
 166             $this->largerImage = ActivityUtils::getLink($element, 'enclosure');
 167
 168             $this->description = ActivityUtils::childContent(
 169                 $element,
 170                 ActivityObject::MEDIA_DESCRIPTION,
 171                 Activity::MEDIA
 172             );
 173         }
 174         if ($this->type == self::_LIST) {
 175             $owner = ActivityUtils::child($this->element, Activity::AUTHOR, Activity::SPEC);
 176             $this->owner = new ActivityObject($owner);
 177         }
 178     }
 179
 180     private function _fromAuthor($element)
 181     {
 182         $this->type = $this->_childContent($element,
 183                                            Activity::OBJECTTYPE,
 184                                            Activity::SPEC);
 185
 186         if (empty($this->type)) {
 187             $this->type = self::PERSON; // XXX: is this fair?
 188         }
 189
 190         // start with <atom:title>
 191
 192         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
 193
 194         if (!empty($title)) {
 195             $this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
 196         }
 197
 198         // fall back to <atom:name>
 199
 200         if (empty($this->title)) {
 201             $this->title = $this->_childContent($element, self::NAME);
 202         }
 203
 204         // start with <atom:id>
 205
 206         $this->id = $this->_childContent($element, self::ID);
 207
 208         // fall back to <atom:uri>
 209
 210         if (empty($this->id)) {
 211             $this->id = $this->_childContent($element, self::URI);
 212         }
 213
 214         // fall further back to <atom:email>
 215
 216         if (empty($this->id)) {
 217             $email = $this->_childContent($element, self::EMAIL);
 218             if (!empty($email)) {
 219                 // XXX: acct: ?
 220                 $this->id = 'mailto:'.$email;
 221             }
 222         }
 223
 224         $this->link = ActivityUtils::getPermalink($element);
 225
 226         // fall finally back to <link rel=alternate>
 227
 228         if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
 229             $this->id = $this->link;
 230         }
 231     }
 232
 233     private function _fromAtomEntry($element)
 234     {
 235         $this->type = $this->_childContent($element, Activity::OBJECTTYPE,
 236                                            Activity::SPEC);
 237
 238         if (empty($this->type)) {
 239             $this->type = ActivityObject::NOTE;
 240         }
 241
 242         $this->summary = ActivityUtils::childHtmlContent($element, self::SUMMARY);
 243         $this->content = ActivityUtils::getContent($element);
 244
 245         // We don't like HTML in our titles, although it's technically allowed
 246
 247         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
 248
 249         $this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
 250
 251         $this->source  = $this->_getSource($element);
 252
 253         $this->link = ActivityUtils::getPermalink($element);
 254
 255         $this->id = $this->_childContent($element, self::ID);
 256
 257         if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
 258             $this->id = $this->link;
 259         }
 260     }
 261
 262     // @todo FIXME: rationalize with Activity::_fromRssItem()
 263     private function _fromRssItem($item)
 264     {
 265         $this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, Activity::RSS);
 266
 267         $contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, Activity::CONTENTNS);
 268
 269         if (!empty($contentEl)) {
 270             $this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
 271         } else {
 272             $descriptionEl = ActivityUtils::child($item, Activity::DESCRIPTION, Activity::RSS);
 273             if (!empty($descriptionEl)) {
 274                 $this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
 275             }
 276         }
 277
 278         $this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, Activity::RSS);
 279
 280         $guidEl = ActivityUtils::child($item, Activity::GUID, Activity::RSS);
 281
 282         if (!empty($guidEl)) {
 283             $this->id = $guidEl->textContent;
 284
 285             if ($guidEl->hasAttribute('isPermaLink')) {
 286                 // overwrites <link>
 287                 $this->link = $this->id;
 288             }
 289         }
 290     }
 291
 292     public static function fromRssAuthor($el)
 293     {
 294         $text = $el->textContent;
 295
 296         if (preg_match('/^(.*?) \((.*)\)$/', $text, $match)) {
 297             $email = $match[1];
 298             $name = $match[2];
 299         } else if (preg_match('/^(.*?) <(.*)>$/', $text, $match)) {
 300             $name = $match[1];
 301             $email = $match[2];
 302         } else if (preg_match('/.*@.*/', $text)) {
 303             $email = $text;
 304             $name = null;
 305         } else {
 306             $name = $text;
 307             $email = null;
 308         }
 309
 310         // Not really enough info
 311
 312         $obj = new ActivityObject();
 313
 314         $obj->element = $el;
 315
 316         $obj->type  = ActivityObject::PERSON;
 317         $obj->title = $name;
 318
 319         if (!empty($email)) {
 320             $obj->id = 'mailto:'.$email;
 321         }
 322
 323         return $obj;
 324     }
 325
 326     public static function fromDcCreator($el)
 327     {
 328         // Not really enough info
 329
 330         $text = $el->textContent;
 331
 332         $obj = new ActivityObject();
 333
 334         $obj->element = $el;
 335
 336         $obj->title = $text;
 337         $obj->type  = ActivityObject::PERSON;
 338
 339         return $obj;
 340     }
 341
 342     public static function fromRssChannel($el)
 343     {
 344         $obj = new ActivityObject();
 345
 346         $obj->element = $el;
 347
 348         $obj->type = ActivityObject::PERSON; // @fixme guess better
 349
 350         $obj->title = ActivityUtils::childContent($el, ActivityObject::TITLE, Activity::RSS);
 351         $obj->link  = ActivityUtils::childContent($el, ActivityUtils::LINK, Activity::RSS);
 352         $obj->id    = ActivityUtils::getLink($el, Activity::SELF);
 353
 354         if (empty($obj->id)) {
 355             $obj->id = $obj->link;
 356         }
 357
 358         $desc = ActivityUtils::childContent($el, Activity::DESCRIPTION, Activity::RSS);
 359
 360         if (!empty($desc)) {
 361             $obj->content = htmlspecialchars_decode($desc, ENT_QUOTES);
 362         }
 363
 364         $imageEl = ActivityUtils::child($el, Activity::IMAGE, Activity::RSS);
 365
 366         if (!empty($imageEl)) {
 367             $url = ActivityUtils::childContent($imageEl, Activity::URL, Activity::RSS);
 368             $al = new AvatarLink();
 369             $al->url = $url;
 370             $obj->avatarLinks[] = $al;
 371         }
 372
 373         return $obj;
 374     }
 375
 376     public static function fromPosterousAuthor($el)
 377     {
 378         $obj = new ActivityObject();
 379
 380         $obj->type = ActivityObject::PERSON; // @fixme any others...?
 381
 382         $userImage = ActivityUtils::childContent($el, self::USERIMAGE, self::POSTEROUS);
 383
 384         if (!empty($userImage)) {
 385             $al = new AvatarLink();
 386             $al->url = $userImage;
 387             $obj->avatarLinks[] = $al;
 388         }
 389
 390         $obj->link = ActivityUtils::childContent($el, self::PROFILEURL, self::POSTEROUS);
 391         $obj->id   = $obj->link;
 392
 393         $obj->poco = new PoCo();
 394
 395         $obj->poco->preferredUsername = ActivityUtils::childContent($el, self::NICKNAME, self::POSTEROUS);
 396         $obj->poco->displayName       = ActivityUtils::childContent($el, self::DISPLAYNAME, self::POSTEROUS);
 397
 398         $obj->title = $obj->poco->displayName;
 399
 400         return $obj;
 401     }
 402
 403     private function _childContent($element, $tag, $namespace=ActivityUtils::ATOM)
 404     {
 405         return ActivityUtils::childContent($element, $tag, $namespace);
 406     }
 407
 408     // Try to get a unique id for the source feed
 409
 410     private function _getSource($element)
 411     {
 412         $sourceEl = ActivityUtils::child($element, 'source');
 413
 414         if (empty($sourceEl)) {
 415             return null;
 416         } else {
 417             $href = ActivityUtils::getLink($sourceEl, 'self');
 418             if (!empty($href)) {
 419                 return $href;
 420             } else {
 421                 return ActivityUtils::childContent($sourceEl, 'id');
 422             }
 423         }
 424     }
 425
 426     static function fromNotice(Notice $notice)
 427     {
 428         $object = new ActivityObject();
 429
 430         if (Event::handle('StartActivityObjectFromNotice', array($notice, &$object))) {
 431
 432             $object->type    = (empty($notice->object_type)) ? ActivityObject::NOTE : $notice->object_type;
 433
 434             $object->id      = $notice->uri;
 435             $object->title   = $notice->content;
 436             $object->content = $notice->rendered;
 437             $object->link    = $notice->bestUrl();
 438
 439             Event::handle('EndActivityObjectFromNotice', array($notice, &$object));
 440         }
 441
 442         return $object;
 443     }
 444
 445     static function fromProfile(Profile $profile)
 446     {
 447         $object = new ActivityObject();
 448
 449         if (Event::handle('StartActivityObjectFromProfile', array($profile, &$object))) {
 450             $object->type   = ActivityObject::PERSON;
 451             $object->id     = $profile->getUri();
 452             $object->title  = $profile->getBestName();
 453             $object->link   = $profile->profileurl;
 454
 455             $orig = $profile->getOriginalAvatar();
 456
 457             if (!empty($orig)) {
 458                 $object->avatarLinks[] = AvatarLink::fromAvatar($orig);
 459             }
 460
 461             $sizes = array(
 462                 AVATAR_PROFILE_SIZE,
 463                 AVATAR_STREAM_SIZE,
 464                 AVATAR_MINI_SIZE
 465             );
 466
 467             foreach ($sizes as $size) {
 468                 $alink  = null;
 469                 $avatar = $profile->getAvatar($size);
 470
 471                 if (!empty($avatar)) {
 472                     $alink = AvatarLink::fromAvatar($avatar);
 473                 } else {
 474                     $alink = new AvatarLink();
 475                     $alink->type   = 'image/png';
 476                     $alink->height = $size;
 477                     $alink->width  = $size;
 478                     $alink->url    = Avatar::defaultImage($size);
 479
 480                     if ($size == AVATAR_PROFILE_SIZE) {
 481                         // Hack for Twitter import: we don't have a 96x96 image,
 482                         // but we do have a 73x73 image. For now, fake it with that.
 483                         $avatar = $profile->getAvatar(73);
 484                         if ($avatar) {
 485                             $alink = AvatarLink::fromAvatar($avatar);
 486                             $alink->height= $size;
 487                             $alink->width = $size;
 488                         }
 489                     }
 490                 }
 491
 492                 $object->avatarLinks[] = $alink;
 493             }
 494
 495             if (isset($profile->lat) && isset($profile->lon)) {
 496                 $object->geopoint = (float)$profile->lat
 497                     . ' ' . (float)$profile->lon;
 498             }
 499
 500             $object->poco = PoCo::fromProfile($profile);
 501
 502             Event::handle('EndActivityObjectFromProfile', array($profile, &$object));
 503         }
 504
 505         return $object;
 506     }
 507
 508     static function fromGroup($group)
 509     {
 510         $object = new ActivityObject();
 511
 512         if (Event::handle('StartActivityObjectFromGroup', array($group, &$object))) {
 513
 514             $object->type   = ActivityObject::GROUP;
 515             $object->id     = $group->getUri();
 516             $object->title  = $group->getBestName();
 517             $object->link   = $group->getUri();
 518
 519             $object->avatarLinks[] = AvatarLink::fromFilename($group->homepage_logo,
 520                                                               AVATAR_PROFILE_SIZE);
 521
 522             $object->avatarLinks[] = AvatarLink::fromFilename($group->stream_logo,
 523                                                               AVATAR_STREAM_SIZE);
 524
 525             $object->avatarLinks[] = AvatarLink::fromFilename($group->mini_logo,
 526                                                               AVATAR_MINI_SIZE);
 527
 528             $object->poco = PoCo::fromGroup($group);
 529             Event::handle('EndActivityObjectFromGroup', array($group, &$object));
 530         }
 531
 532         return $object;
 533     }
 534
 535     static function fromPeopletag($ptag)
 536     {
 537         $object = new ActivityObject();
 538         if (Event::handle('StartActivityObjectFromPeopletag', array($ptag, &$object))) {
 539             $object->type    = ActivityObject::_LIST;
 540
 541             $object->id      = $ptag->getUri();
 542             $object->title   = $ptag->tag;
 543             $object->summary = $ptag->description;
 544             $object->link    = $ptag->homeUrl();
 545             $object->owner   = Profile::staticGet('id', $ptag->tagger);
 546             $object->poco    = PoCo::fromProfile($object->owner);
 547             Event::handle('EndActivityObjectFromPeopletag', array($ptag, &$object));
 548         }
 549         return $object;
 550     }
 551
 552     function outputTo($xo, $tag='activity:object')
 553     {
 554         if (!empty($tag)) {
 555             $xo->elementStart($tag);
 556         }
 557
 558         if (Event::handle('StartActivityObjectOutputAtom', array($this, $xo))) {
 559             $xo->element('activity:object-type', null, $this->type);
 560
 561             // <author> uses URI
 562
 563             if ($tag == 'author') {
 564                 $xo->element(self::URI, null, $this->id);
 565             } else {
 566                 $xo->element(self::ID, null, $this->id);
 567             }
 568
 569             if (!empty($this->title)) {
 570                 $name = common_xml_safe_str($this->title);
 571                 if ($tag == 'author') {
 572                     // XXX: Backward compatibility hack -- atom:name should contain
 573                     // full name here, instead of nickname, i.e.: $name. Change
 574                     // this in the next version.
 575                     $xo->element(self::NAME, null, $this->poco->preferredUsername);
 576                 } else {
 577                     $xo->element(self::TITLE, null, $name);
 578                 }
 579             }
 580
 581             if (!empty($this->summary)) {
 582                 $xo->element(
 583                     self::SUMMARY,
 584                     null,
 585                     common_xml_safe_str($this->summary)
 586                 );
 587             }
 588
 589             if (!empty($this->content)) {
 590                 // XXX: assuming HTML content here
 591                 $xo->element(
 592                     ActivityUtils::CONTENT,
 593                     array('type' => 'html'),
 594                     common_xml_safe_str($this->content)
 595                 );
 596             }
 597
 598             if (!empty($this->link)) {
 599                 $xo->element(
 600                     'link',
 601                     array(
 602                         'rel' => 'alternate',
 603                         'type' => 'text/html',
 604                         'href' => $this->link
 605                     ),
 606                     null
 607                 );
 608             }
 609
 610             if(!empty($this->owner)) {
 611                 $owner = $this->owner->asActivityNoun(self::AUTHOR);
 612                 $xo->raw($owner);
 613             }
 614
 615             if ($this->type == ActivityObject::PERSON
 616                 || $this->type == ActivityObject::GROUP) {
 617
 618                 foreach ($this->avatarLinks as $avatar) {
 619                     $xo->element(
 620                         'link', array(
 621                             'rel'  => 'avatar',
 622                             'type'         => $avatar->type,
 623                             'media:width'  => $avatar->width,
 624                             'media:height' => $avatar->height,
 625                             'href' => $avatar->url
 626                         ),
 627                         null
 628                     );
 629                 }
 630             }
 631
 632             if (!empty($this->geopoint)) {
 633                 $xo->element(
 634                     'georss:point',
 635                     null,
 636                     $this->geopoint
 637                 );
 638             }
 639
 640             if (!empty($this->poco)) {
 641                 $this->poco->outputTo($xo);
 642             }
 643
 644             // @fixme there's no way here to make a tree; elements can only contain plaintext
 645             // @fixme these may collide with JSON extensions
 646             foreach ($this->extra as $el) {
 647                 list($extraTag, $attrs, $content) = $el;
 648                 $xo->element($extraTag, $attrs, $content);
 649             }
 650
 651             Event::handle('EndActivityObjectOutputAtom', array($this, $xo));
 652         }
 653
 654         if (!empty($tag)) {
 655             $xo->elementEnd($tag);
 656         }
 657
 658         return;
 659     }
 660
 661     function asString($tag='activity:object')
 662     {
 663         $xs = new XMLStringer(true);
 664
 665         $this->outputTo($xs, $tag);
 666
 667         return $xs->getString();
 668     }
 669
 670     /*
 671      * Returns an array based on this Activity Object suitable for
 672      * encoding as JSON.
 673      *
 674      * @return array $object the activity object array
 675      */
 676
 677     function asArray()
 678     {
 679         $object = array();
 680
 681         if (Event::handle('StartActivityObjectOutputJson', array($this, &$object))) {
 682             // XXX: attachments are added by Activity
 683
 684             // author (Add object for author? Could be useful for repeats.)
 685
 686             // content (Add rendered version of the notice?)
 687
 688             // displayName
 689             $object['displayName'] = $this->title;
 690
 691             // downstreamDuplicates
 692
 693             // id
 694             $object['id'] = $this->id;
 695             //
 696             // XXX: Should we use URL here? or a crazy tag URI?
 697             $object['id'] = $this->id;
 698
 699             if ($this->type == ActivityObject::PERSON
 700                 || $this->type == ActivityObject::GROUP) {
 701
 702                 // XXX: Not sure what the best avatar is to use for the
 703                 // author's "image". For now, I'm using the large size.
 704
 705                 $imgLink          = null;
 706                 $avatarMediaLinks = array();
 707
 708                 foreach ($this->avatarLinks as $a) {
 709
 710                     // Make a MediaLink for every other Avatar
 711                     $avatar = new ActivityStreamsMediaLink(
 712                         $a->url,
 713                         $a->width,
 714                         $a->height,
 715                         $a->type,
 716                         'avatar'
 717                     );
 718
 719                     // Find the big avatar to use as the "image"
 720                     if ($a->height == AVATAR_PROFILE_SIZE) {
 721                         $imgLink = $avatar;
 722                     }
 723
 724                     $avatarMediaLinks[] = $avatar->asArray();
 725                 }
 726
 727                 $object['avatarLinks'] = $avatarMediaLinks; // extension
 728
 729                 // image
 730                 if (!empty($imgLink)) {
 731                     $object['image']  = $imgLink->asArray();
 732                 }
 733             }
 734
 735             // objectType
 736             //
 737             // We can probably use the whole schema URL here but probably the
 738             // relative simple name is easier to parse
 739             // @fixme this breaks extension URIs
 740             $object['type'] = substr($this->type, strrpos($this->type, '/') + 1);
 741
 742             // published (probably don't need. Might be useful for repeats.)
 743
 744             // summary
 745             $object['summary'] = $this->summary;
 746
 747             // udpated (probably don't need this)
 748
 749             // TODO: upstreamDuplicates
 750
 751             // url (XXX: need to put the right thing here...)
 752             $object['url'] = $this->id;
 753
 754             /* Extensions */
 755             // @fixme these may collide with XML extensions
 756             // @fixme multiple tags of same name will overwrite each other
 757             // @fixme text content from XML extensions will be lost
 758             foreach ($this->extra as $e) {
 759                 list($objectName, $props, $txt) = $e;
 760                 $object[$objectName] = $props;
 761             }
 762
 763             if (!empty($this->geopoint)) {
 764
 765                 list($lat, $long) = explode(' ', $this->geopoint);
 766
 767                 $object['geopoint'] = array(
 768                     'type'        => 'Point',
 769                     'coordinates' => array($lat, $long)
 770                 );
 771             }
 772
 773             if (!empty($this->poco)) {
 774                 $object['contact'] = array_filter($this->poco->asArray());
 775             }
 776             Event::handle('EndActivityObjectOutputJson', array($this, &$object));
 777         }
 778         return array_filter($object);
 779     }
 780 }