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
  72     // Atom elements we snarf
  73
  74     const TITLE   = 'title';
  75     const SUMMARY = 'summary';
  76     const ID      = 'id';
  77     const SOURCE  = 'source';
  78
  79     const NAME  = 'name';
  80     const URI   = 'uri';
  81     const EMAIL = 'email';
  82
  83     const POSTEROUS   = 'http://posterous.com/help/rss/1.0';
  84     const AUTHOR      = 'author';
  85     const USERIMAGE   = 'userImage';
  86     const PROFILEURL  = 'profileUrl';
  87     const NICKNAME    = 'nickName';
  88     const DISPLAYNAME = 'displayName';
  89
  90     public $element;
  91     public $type;
  92     public $id;
  93     public $title;
  94     public $summary;
  95     public $content;
  96     public $owner;
  97     public $link;
  98     public $source;
  99     public $avatarLinks = array();
 100     public $geopoint;
 101     public $poco;
 102     public $displayName;
 103
 104     // @todo move this stuff to it's own PHOTO activity object
 105     const MEDIA_DESCRIPTION = 'description';
 106
 107     public $thumbnail;
 108     public $largerImage;
 109     public $description;
 110     public $extra = array();
 111
 112     /**
 113      * Constructor
 114      *
 115      * This probably needs to be refactored
 116      * to generate a local class (ActivityPerson, ActivityFile, ...)
 117      * based on the object type.
 118      *
 119      * @param DOMElement $element DOM thing to turn into an Activity thing
 120      */
 121     function __construct($element = null)
 122     {
 123         if (empty($element)) {
 124             return;
 125         }
 126
 127         $this->element = $element;
 128
 129         $this->geopoint = $this->_childContent(
 130             $element,
 131             ActivityContext::POINT,
 132             ActivityContext::GEORSS
 133         );
 134
 135         if ($element->tagName == 'author') {
 136             $this->_fromAuthor($element);
 137         } else if ($element->tagName == 'item') {
 138             $this->_fromRssItem($element);
 139         } else {
 140             $this->_fromAtomEntry($element);
 141         }
 142
 143         // Some per-type attributes...
 144         if ($this->type == self::PERSON || $this->type == self::GROUP) {
 145             $this->displayName = $this->title;
 146
 147             $photos = ActivityUtils::getLinks($element, 'photo');
 148             if (count($photos)) {
 149                 foreach ($photos as $link) {
 150                     $this->avatarLinks[] = new AvatarLink($link);
 151                 }
 152             } else {
 153                 $avatars = ActivityUtils::getLinks($element, 'avatar');
 154                 foreach ($avatars as $link) {
 155                     $this->avatarLinks[] = new AvatarLink($link);
 156                 }
 157             }
 158
 159             $this->poco = new PoCo($element);
 160         }
 161
 162         if ($this->type == self::PHOTO) {
 163
 164             $this->thumbnail   = ActivityUtils::getLink($element, 'preview');
 165             $this->largerImage = ActivityUtils::getLink($element, 'enclosure');
 166
 167             $this->description = ActivityUtils::childContent(
 168                 $element,
 169                 ActivityObject::MEDIA_DESCRIPTION,
 170                 Activity::MEDIA
 171             );
 172         }
 173         if ($this->type == self::_LIST) {
 174             $owner = ActivityUtils::child($this->element, Activity::AUTHOR, Activity::SPEC);
 175             $this->owner = new ActivityObject($owner);
 176         }
 177     }
 178
 179     private function _fromAuthor($element)
 180     {
 181         $this->type = $this->_childContent($element,
 182                                            Activity::OBJECTTYPE,
 183                                            Activity::SPEC);
 184
 185         if (empty($this->type)) {
 186             $this->type = self::PERSON; // XXX: is this fair?
 187         }
 188
 189         // start with <atom:title>
 190
 191         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
 192
 193         if (!empty($title)) {
 194             $this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
 195         }
 196
 197         // fall back to <atom:name>
 198
 199         if (empty($this->title)) {
 200             $this->title = $this->_childContent($element, self::NAME);
 201         }
 202
 203         // start with <atom:id>
 204
 205         $this->id = $this->_childContent($element, self::ID);
 206
 207         // fall back to <atom:uri>
 208
 209         if (empty($this->id)) {
 210             $this->id = $this->_childContent($element, self::URI);
 211         }
 212
 213         // fall further back to <atom:email>
 214
 215         if (empty($this->id)) {
 216             $email = $this->_childContent($element, self::EMAIL);
 217             if (!empty($email)) {
 218                 // XXX: acct: ?
 219                 $this->id = 'mailto:'.$email;
 220             }
 221         }
 222
 223         $this->link = ActivityUtils::getPermalink($element);
 224
 225         // fall finally back to <link rel=alternate>
 226
 227         if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
 228             $this->id = $this->link;
 229         }
 230     }
 231
 232     private function _fromAtomEntry($element)
 233     {
 234         $this->type = $this->_childContent($element, Activity::OBJECTTYPE,
 235                                            Activity::SPEC);
 236
 237         if (empty($this->type)) {
 238             $this->type = ActivityObject::NOTE;
 239         }
 240
 241         $this->summary = ActivityUtils::childHtmlContent($element, self::SUMMARY);
 242         $this->content = ActivityUtils::getContent($element);
 243
 244         // We don't like HTML in our titles, although it's technically allowed
 245
 246         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
 247
 248         $this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
 249
 250         $this->source  = $this->_getSource($element);
 251
 252         $this->link = ActivityUtils::getPermalink($element);
 253
 254         $this->id = $this->_childContent($element, self::ID);
 255
 256         if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
 257             $this->id = $this->link;
 258         }
 259     }
 260
 261     // @todo FIXME: rationalize with Activity::_fromRssItem()
 262     private function _fromRssItem($item)
 263     {
 264         $this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, Activity::RSS);
 265
 266         $contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, Activity::CONTENTNS);
 267
 268         if (!empty($contentEl)) {
 269             $this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
 270         } else {
 271             $descriptionEl = ActivityUtils::child($item, Activity::DESCRIPTION, Activity::RSS);
 272             if (!empty($descriptionEl)) {
 273                 $this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
 274             }
 275         }
 276
 277         $this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, Activity::RSS);
 278
 279         $guidEl = ActivityUtils::child($item, Activity::GUID, Activity::RSS);
 280
 281         if (!empty($guidEl)) {
 282             $this->id = $guidEl->textContent;
 283
 284             if ($guidEl->hasAttribute('isPermaLink')) {
 285                 // overwrites <link>
 286                 $this->link = $this->id;
 287             }
 288         }
 289     }
 290
 291     public static function fromRssAuthor($el)
 292     {
 293         $text = $el->textContent;
 294
 295         if (preg_match('/^(.*?) \((.*)\)$/', $text, $match)) {
 296             $email = $match[1];
 297             $name = $match[2];
 298         } else if (preg_match('/^(.*?) <(.*)>$/', $text, $match)) {
 299             $name = $match[1];
 300             $email = $match[2];
 301         } else if (preg_match('/.*@.*/', $text)) {
 302             $email = $text;
 303             $name = null;
 304         } else {
 305             $name = $text;
 306             $email = null;
 307         }
 308
 309         // Not really enough info
 310
 311         $obj = new ActivityObject();
 312
 313         $obj->element = $el;
 314
 315         $obj->type  = ActivityObject::PERSON;
 316         $obj->title = $name;
 317
 318         if (!empty($email)) {
 319             $obj->id = 'mailto:'.$email;
 320         }
 321
 322         return $obj;
 323     }
 324
 325     public static function fromDcCreator($el)
 326     {
 327         // Not really enough info
 328
 329         $text = $el->textContent;
 330
 331         $obj = new ActivityObject();
 332
 333         $obj->element = $el;
 334
 335         $obj->title = $text;
 336         $obj->type  = ActivityObject::PERSON;
 337
 338         return $obj;
 339     }
 340
 341     public static function fromRssChannel($el)
 342     {
 343         $obj = new ActivityObject();
 344
 345         $obj->element = $el;
 346
 347         $obj->type = ActivityObject::PERSON; // @fixme guess better
 348
 349         $obj->title = ActivityUtils::childContent($el, ActivityObject::TITLE, Activity::RSS);
 350         $obj->link  = ActivityUtils::childContent($el, ActivityUtils::LINK, Activity::RSS);
 351         $obj->id    = ActivityUtils::getLink($el, Activity::SELF);
 352
 353         if (empty($obj->id)) {
 354             $obj->id = $obj->link;
 355         }
 356
 357         $desc = ActivityUtils::childContent($el, Activity::DESCRIPTION, Activity::RSS);
 358
 359         if (!empty($desc)) {
 360             $obj->content = htmlspecialchars_decode($desc, ENT_QUOTES);
 361         }
 362
 363         $imageEl = ActivityUtils::child($el, Activity::IMAGE, Activity::RSS);
 364
 365         if (!empty($imageEl)) {
 366             $url = ActivityUtils::childContent($imageEl, Activity::URL, Activity::RSS);
 367             $al = new AvatarLink();
 368             $al->url = $url;
 369             $obj->avatarLinks[] = $al;
 370         }
 371
 372         return $obj;
 373     }
 374
 375     public static function fromPosterousAuthor($el)
 376     {
 377         $obj = new ActivityObject();
 378
 379         $obj->type = ActivityObject::PERSON; // @fixme any others...?
 380
 381         $userImage = ActivityUtils::childContent($el, self::USERIMAGE, self::POSTEROUS);
 382
 383         if (!empty($userImage)) {
 384             $al = new AvatarLink();
 385             $al->url = $userImage;
 386             $obj->avatarLinks[] = $al;
 387         }
 388
 389         $obj->link = ActivityUtils::childContent($el, self::PROFILEURL, self::POSTEROUS);
 390         $obj->id   = $obj->link;
 391
 392         $obj->poco = new PoCo();
 393
 394         $obj->poco->preferredUsername = ActivityUtils::childContent($el, self::NICKNAME, self::POSTEROUS);
 395         $obj->poco->displayName       = ActivityUtils::childContent($el, self::DISPLAYNAME, self::POSTEROUS);
 396
 397         $obj->title = $obj->poco->displayName;
 398
 399         return $obj;
 400     }
 401
 402     private function _childContent($element, $tag, $namespace=ActivityUtils::ATOM)
 403     {
 404         return ActivityUtils::childContent($element, $tag, $namespace);
 405     }
 406
 407     // Try to get a unique id for the source feed
 408
 409     private function _getSource($element)
 410     {
 411         $sourceEl = ActivityUtils::child($element, 'source');
 412
 413         if (empty($sourceEl)) {
 414             return null;
 415         } else {
 416             $href = ActivityUtils::getLink($sourceEl, 'self');
 417             if (!empty($href)) {
 418                 return $href;
 419             } else {
 420                 return ActivityUtils::childContent($sourceEl, 'id');
 421             }
 422         }
 423     }
 424
 425     static function fromNotice(Notice $notice)
 426     {
 427         $object = new ActivityObject();
 428
 429                 if (Event::handle('StartActivityObjectFromNotice', array($notice, &$object))) {
 430
 431                         $object->type    = (empty($notice->object_type)) ? ActivityObject::NOTE : $notice->object_type;
 432
 433                         $object->id      = $notice->uri;
 434                         $object->title   = $notice->content;
 435                         $object->content = $notice->rendered;
 436                         $object->link    = $notice->bestUrl();
 437
 438                         Event::handle('EndActivityObjectFromNotice', array($notice, &$object));
 439                 }
 440
 441         return $object;
 442     }
 443
 444     static function fromProfile(Profile $profile)
 445     {
 446         $object = new ActivityObject();
 447
 448                 if (Event::handle('StartActivityObjectFromProfile', array($profile, &$object))) {
 449
 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' => $avatar->url
 626                         ),
 627                         null
 628                     );
 629                 }
 630             }
 631
 632
 633             if (!empty($this->geopoint)) {
 634                 $xo->element(
 635                     'georss:point',
 636                     null,
 637                     $this->geopoint
 638                 );
 639             }
 640
 641             if (!empty($this->poco)) {
 642                 $this->poco->outputTo($xo);
 643             }
 644
 645             // @fixme there's no way here to make a tree; elements can only contain plaintext
 646             // @fixme these may collide with JSON extensions
 647             foreach ($this->extra as $el) {
 648                 list($extraTag, $attrs, $content) = $el;
 649                 $xo->element($extraTag, $attrs, $content);
 650             }
 651
 652             Event::handle('EndActivityObjectOutputAtom', array($this, $xo));
 653         }
 654
 655                 if (!empty($tag)) {
 656                         $xo->elementEnd($tag);
 657                 }
 658
 659         return;
 660         }
 661
 662     function asString($tag='activity:object')
 663     {
 664         $xs = new XMLStringer(true);
 665
 666                 $this->outputTo($xs, $tag);
 667
 668         return $xs->getString();
 669     }
 670
 671     /*
 672      * Returns an array based on this Activity Object suitable for
 673      * encoding as JSON.
 674      *
 675      * @return array $object the activity object array
 676      */
 677
 678     function asArray()
 679     {
 680         $object = array();
 681
 682         if (Event::handle('StartActivityObjectOutputJson', array($this, &$object))) {
 683             // XXX: attachedObjects are added by Activity
 684
 685             // displayName
 686             $object['displayName'] = $this->title;
 687
 688             // TODO: downstreamDuplicates
 689
 690             // embedCode (used for video)
 691
 692             // id
 693             //
 694             // XXX: Should we use URL here? or a crazy tag URI?
 695             $object['id'] = $this->id;
 696
 697             if ($this->type == ActivityObject::PERSON
 698                 || $this->type == ActivityObject::GROUP) {
 699
 700                 // XXX: Not sure what the best avatar is to use for the
 701                 // author's "image". For now, I'm using the large size.
 702
 703                 $avatarLarge      = null;
 704                 $avatarMediaLinks = array();
 705
 706                 foreach ($this->avatarLinks as $a) {
 707
 708                     // Make a MediaLink for every other Avatar
 709                     $avatar = new ActivityStreamsMediaLink(
 710                         $a->url,
 711                         $a->width,
 712                         $a->height,
 713                         $a->type,
 714                         'avatar'
 715                     );
 716
 717                     // Find the big avatar to use as the "image"
 718                     if ($a->height == AVATAR_PROFILE_SIZE) {
 719                         $imgLink = $avatar;
 720                     }
 721
 722                     $avatarMediaLinks[] = $avatar->asArray();
 723                 }
 724
 725                 $object['avatarLinks'] = $avatarMediaLinks; // extension
 726
 727                 // image
 728                 $object['image']  = $imgLink->asArray();
 729             }
 730
 731             // objectType
 732             //
 733             // We can probably use the whole schema URL here but probably the
 734             // relative simple name is easier to parse
 735             // @fixme this breaks extension URIs
 736             $object['type'] = substr($this->type, strrpos($this->type, '/') + 1);
 737
 738             // summary
 739             $object['summary'] = $this->summary;
 740
 741             // TODO: upstreamDuplicates
 742
 743             // url (XXX: need to put the right thing here...)
 744             $object['url'] = $this->id;
 745
 746             /* Extensions */
 747             // @fixme these may collide with XML extensions
 748             // @fixme multiple tags of same name will overwrite each other
 749             // @fixme text content from XML extensions will be lost
 750             foreach ($this->extra as $e) {
 751                 list($objectName, $props, $txt) = $e;
 752                 $object[$objectName] = $props;
 753             }
 754
 755             // GeoJSON
 756
 757             if (!empty($this->geopoint)) {
 758
 759                 list($lat, $long) = explode(' ', $this->geopoint);
 760
 761                 $object['geopoint'] = array(
 762                     'type'        => 'Point',
 763                     'coordinates' => array($lat, $long)
 764                 );
 765             }
 766
 767             if (!empty($this->poco)) {
 768                 $object['contact'] = $this->poco->asArray();
 769             }
 770             Event::handle('EndActivityObjectOutputJson', array($this, &$object));
 771         }
 772         return array_filter($object);
 773     }
 774 }