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     const SERVICE   = 'http://activitystrea.ms/schema/1.0/service';
  73
  74     // Atom elements we snarf
  75
  76     const TITLE   = 'title';
  77     const SUMMARY = 'summary';
  78     const ID      = 'id';
  79     const SOURCE  = 'source';
  80
  81     const NAME  = 'name';
  82     const URI   = 'uri';
  83     const EMAIL = 'email';
  84
  85     const POSTEROUS   = 'http://posterous.com/help/rss/1.0';
  86     const AUTHOR      = 'author';
  87     const USERIMAGE   = 'userImage';
  88     const PROFILEURL  = 'profileUrl';
  89     const NICKNAME    = 'nickName';
  90     const DISPLAYNAME = 'displayName';
  91
  92     public $element;
  93     public $type;
  94     public $id;
  95     public $title;
  96     public $summary;
  97     public $content;
  98     public $owner;
  99     public $link;
 100     public $source;
 101     public $avatarLinks = array();
 102     public $geopoint;
 103     public $poco;
 104     public $displayName;
 105
 106     // @todo move this stuff to it's own PHOTO activity object
 107     const MEDIA_DESCRIPTION = 'description';
 108
 109     public $thumbnail;
 110     public $largerImage;
 111     public $description;
 112     public $extra = array();
 113
 114     /**
 115      * Constructor
 116      *
 117      * This probably needs to be refactored
 118      * to generate a local class (ActivityPerson, ActivityFile, ...)
 119      * based on the object type.
 120      *
 121      * @param DOMElement $element DOM thing to turn into an Activity thing
 122      */
 123     function __construct($element = null)
 124     {
 125         if (empty($element)) {
 126             return;
 127         }
 128
 129         $this->element = $element;
 130
 131         $this->geopoint = $this->_childContent(
 132             $element,
 133             ActivityContext::POINT,
 134             ActivityContext::GEORSS
 135         );
 136
 137         if ($element->tagName == 'author') {
 138             $this->_fromAuthor($element);
 139         } else if ($element->tagName == 'item') {
 140             $this->_fromRssItem($element);
 141         } else {
 142             $this->_fromAtomEntry($element);
 143         }
 144
 145         // Some per-type attributes...
 146         if ($this->type == self::PERSON || $this->type == self::GROUP) {
 147             $this->displayName = $this->title;
 148
 149             $photos = ActivityUtils::getLinks($element, 'photo');
 150             if (count($photos)) {
 151                 foreach ($photos as $link) {
 152                     $this->avatarLinks[] = new AvatarLink($link);
 153                 }
 154             } else {
 155                 $avatars = ActivityUtils::getLinks($element, 'avatar');
 156                 foreach ($avatars as $link) {
 157                     $this->avatarLinks[] = new AvatarLink($link);
 158                 }
 159             }
 160
 161             $this->poco = new PoCo($element);
 162         }
 163
 164         if ($this->type == self::PHOTO) {
 165
 166             $this->thumbnail   = ActivityUtils::getLink($element, 'preview');
 167             $this->largerImage = ActivityUtils::getLink($element, 'enclosure');
 168
 169             $this->description = ActivityUtils::childContent(
 170                 $element,
 171                 ActivityObject::MEDIA_DESCRIPTION,
 172                 Activity::MEDIA
 173             );
 174         }
 175         if ($this->type == self::_LIST) {
 176             $owner = ActivityUtils::child($this->element, Activity::AUTHOR, Activity::SPEC);
 177             $this->owner = new ActivityObject($owner);
 178         }
 179     }
 180
 181     private function _fromAuthor($element)
 182     {
 183         $this->type = $this->_childContent($element,
 184                                            Activity::OBJECTTYPE,
 185                                            Activity::SPEC);
 186
 187         if (empty($this->type)) {
 188             $this->type = self::PERSON; // XXX: is this fair?
 189         }
 190
 191         // start with <atom:title>
 192
 193         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
 194
 195         if (!empty($title)) {
 196             $this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
 197         }
 198
 199         // fall back to <atom:name>
 200
 201         if (empty($this->title)) {
 202             $this->title = $this->_childContent($element, self::NAME);
 203         }
 204
 205         // start with <atom:id>
 206
 207         $this->id = $this->_childContent($element, self::ID);
 208
 209         // fall back to <atom:uri>
 210
 211         if (empty($this->id)) {
 212             $this->id = $this->_childContent($element, self::URI);
 213         }
 214
 215         // fall further back to <atom:email>
 216
 217         if (empty($this->id)) {
 218             $email = $this->_childContent($element, self::EMAIL);
 219             if (!empty($email)) {
 220                 // XXX: acct: ?
 221                 $this->id = 'mailto:'.$email;
 222             }
 223         }
 224
 225         $this->link = ActivityUtils::getPermalink($element);
 226
 227         // fall finally back to <link rel=alternate>
 228
 229         if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
 230             $this->id = $this->link;
 231         }
 232     }
 233
 234     private function _fromAtomEntry($element)
 235     {
 236         $this->type = $this->_childContent($element, Activity::OBJECTTYPE,
 237                                            Activity::SPEC);
 238
 239         if (empty($this->type)) {
 240             $this->type = ActivityObject::NOTE;
 241         }
 242
 243         $this->summary = ActivityUtils::childHtmlContent($element, self::SUMMARY);
 244         $this->content = ActivityUtils::getContent($element);
 245
 246         // We don't like HTML in our titles, although it's technically allowed
 247
 248         $title = ActivityUtils::childHtmlContent($element, self::TITLE);
 249
 250         $this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
 251
 252         $this->source  = $this->_getSource($element);
 253
 254         $this->link = ActivityUtils::getPermalink($element);
 255
 256         $this->id = $this->_childContent($element, self::ID);
 257
 258         if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
 259             $this->id = $this->link;
 260         }
 261     }
 262
 263     // @todo FIXME: rationalize with Activity::_fromRssItem()
 264     private function _fromRssItem($item)
 265     {
 266         $this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, Activity::RSS);
 267
 268         $contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, Activity::CONTENTNS);
 269
 270         if (!empty($contentEl)) {
 271             $this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
 272         } else {
 273             $descriptionEl = ActivityUtils::child($item, Activity::DESCRIPTION, Activity::RSS);
 274             if (!empty($descriptionEl)) {
 275                 $this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
 276             }
 277         }
 278
 279         $this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, Activity::RSS);
 280
 281         $guidEl = ActivityUtils::child($item, Activity::GUID, Activity::RSS);
 282
 283         if (!empty($guidEl)) {
 284             $this->id = $guidEl->textContent;
 285
 286             if ($guidEl->hasAttribute('isPermaLink')) {
 287                 // overwrites <link>
 288                 $this->link = $this->id;
 289             }
 290         }
 291     }
 292
 293     public static function fromRssAuthor($el)
 294     {
 295         $text = $el->textContent;
 296
 297         if (preg_match('/^(.*?) \((.*)\)$/', $text, $match)) {
 298             $email = $match[1];
 299             $name = $match[2];
 300         } else if (preg_match('/^(.*?) <(.*)>$/', $text, $match)) {
 301             $name = $match[1];
 302             $email = $match[2];
 303         } else if (preg_match('/.*@.*/', $text)) {
 304             $email = $text;
 305             $name = null;
 306         } else {
 307             $name = $text;
 308             $email = null;
 309         }
 310
 311         // Not really enough info
 312
 313         $obj = new ActivityObject();
 314
 315         $obj->element = $el;
 316
 317         $obj->type  = ActivityObject::PERSON;
 318         $obj->title = $name;
 319
 320         if (!empty($email)) {
 321             $obj->id = 'mailto:'.$email;
 322         }
 323
 324         return $obj;
 325     }
 326
 327     public static function fromDcCreator($el)
 328     {
 329         // Not really enough info
 330
 331         $text = $el->textContent;
 332
 333         $obj = new ActivityObject();
 334
 335         $obj->element = $el;
 336
 337         $obj->title = $text;
 338         $obj->type  = ActivityObject::PERSON;
 339
 340         return $obj;
 341     }
 342
 343     public static function fromRssChannel($el)
 344     {
 345         $obj = new ActivityObject();
 346
 347         $obj->element = $el;
 348
 349         $obj->type = ActivityObject::PERSON; // @fixme guess better
 350
 351         $obj->title = ActivityUtils::childContent($el, ActivityObject::TITLE, Activity::RSS);
 352         $obj->link  = ActivityUtils::childContent($el, ActivityUtils::LINK, Activity::RSS);
 353         $obj->id    = ActivityUtils::getLink($el, Activity::SELF);
 354
 355         if (empty($obj->id)) {
 356             $obj->id = $obj->link;
 357         }
 358
 359         $desc = ActivityUtils::childContent($el, Activity::DESCRIPTION, Activity::RSS);
 360
 361         if (!empty($desc)) {
 362             $obj->content = htmlspecialchars_decode($desc, ENT_QUOTES);
 363         }
 364
 365         $imageEl = ActivityUtils::child($el, Activity::IMAGE, Activity::RSS);
 366
 367         if (!empty($imageEl)) {
 368             $url = ActivityUtils::childContent($imageEl, Activity::URL, Activity::RSS);
 369             $al = new AvatarLink();
 370             $al->url = $url;
 371             $obj->avatarLinks[] = $al;
 372         }
 373
 374         return $obj;
 375     }
 376
 377     public static function fromPosterousAuthor($el)
 378     {
 379         $obj = new ActivityObject();
 380
 381         $obj->type = ActivityObject::PERSON; // @fixme any others...?
 382
 383         $userImage = ActivityUtils::childContent($el, self::USERIMAGE, self::POSTEROUS);
 384
 385         if (!empty($userImage)) {
 386             $al = new AvatarLink();
 387             $al->url = $userImage;
 388             $obj->avatarLinks[] = $al;
 389         }
 390
 391         $obj->link = ActivityUtils::childContent($el, self::PROFILEURL, self::POSTEROUS);
 392         $obj->id   = $obj->link;
 393
 394         $obj->poco = new PoCo();
 395
 396         $obj->poco->preferredUsername = ActivityUtils::childContent($el, self::NICKNAME, self::POSTEROUS);
 397         $obj->poco->displayName       = ActivityUtils::childContent($el, self::DISPLAYNAME, self::POSTEROUS);
 398
 399         $obj->title = $obj->poco->displayName;
 400
 401         return $obj;
 402     }
 403
 404     private function _childContent($element, $tag, $namespace=ActivityUtils::ATOM)
 405     {
 406         return ActivityUtils::childContent($element, $tag, $namespace);
 407     }
 408
 409     // Try to get a unique id for the source feed
 410
 411     private function _getSource($element)
 412     {
 413         $sourceEl = ActivityUtils::child($element, 'source');
 414
 415         if (empty($sourceEl)) {
 416             return null;
 417         } else {
 418             $href = ActivityUtils::getLink($sourceEl, 'self');
 419             if (!empty($href)) {
 420                 return $href;
 421             } else {
 422                 return ActivityUtils::childContent($sourceEl, 'id');
 423             }
 424         }
 425     }
 426
 427     static function fromNotice(Notice $notice)
 428     {
 429         $object = new ActivityObject();
 430
 431         if (Event::handle('StartActivityObjectFromNotice', array($notice, &$object))) {
 432
 433             $object->type    = (empty($notice->object_type)) ? ActivityObject::NOTE : $notice->object_type;
 434
 435             $object->id      = $notice->uri;
 436             $object->title   = $notice->content;
 437             $object->content = $notice->rendered;
 438             $object->link    = $notice->bestUrl();
 439
 440             Event::handle('EndActivityObjectFromNotice', array($notice, &$object));
 441         }
 442
 443         return $object;
 444     }
 445
 446     static function fromProfile(Profile $profile)
 447     {
 448         $object = new ActivityObject();
 449
 450         if (Event::handle('StartActivityObjectFromProfile', array($profile, &$object))) {
 451             $object->type   = ActivityObject::PERSON;
 452             $object->id     = $profile->getUri();
 453             $object->title  = $profile->getBestName();
 454             $object->link   = $profile->profileurl;
 455
 456             $orig = $profile->getOriginalAvatar();
 457
 458             if (!empty($orig)) {
 459                 $object->avatarLinks[] = AvatarLink::fromAvatar($orig);
 460             }
 461
 462             $sizes = array(
 463                 AVATAR_PROFILE_SIZE,
 464                 AVATAR_STREAM_SIZE,
 465                 AVATAR_MINI_SIZE
 466             );
 467
 468             foreach ($sizes as $size) {
 469                 $alink  = null;
 470                 $avatar = $profile->getAvatar($size);
 471
 472                 if (!empty($avatar)) {
 473                     $alink = AvatarLink::fromAvatar($avatar);
 474                 } else {
 475                     $alink = new AvatarLink();
 476                     $alink->type   = 'image/png';
 477                     $alink->height = $size;
 478                     $alink->width  = $size;
 479                     $alink->url    = Avatar::defaultImage($size);
 480
 481                     if ($size == AVATAR_PROFILE_SIZE) {
 482                         // Hack for Twitter import: we don't have a 96x96 image,
 483                         // but we do have a 73x73 image. For now, fake it with that.
 484                         $avatar = $profile->getAvatar(73);
 485                         if ($avatar) {
 486                             $alink = AvatarLink::fromAvatar($avatar);
 487                             $alink->height= $size;
 488                             $alink->width = $size;
 489                         }
 490                     }
 491                 }
 492
 493                 $object->avatarLinks[] = $alink;
 494             }
 495
 496             if (isset($profile->lat) && isset($profile->lon)) {
 497                 $object->geopoint = (float)$profile->lat
 498                     . ' ' . (float)$profile->lon;
 499             }
 500
 501             $object->poco = PoCo::fromProfile($profile);
 502
 503             Event::handle('EndActivityObjectFromProfile', array($profile, &$object));
 504         }
 505
 506         return $object;
 507     }
 508
 509     static function fromGroup($group)
 510     {
 511         $object = new ActivityObject();
 512
 513         if (Event::handle('StartActivityObjectFromGroup', array($group, &$object))) {
 514
 515             $object->type   = ActivityObject::GROUP;
 516             $object->id     = $group->getUri();
 517             $object->title  = $group->getBestName();
 518             $object->link   = $group->getUri();
 519
 520             $object->avatarLinks[] = AvatarLink::fromFilename($group->homepage_logo,
 521                                                               AVATAR_PROFILE_SIZE);
 522
 523             $object->avatarLinks[] = AvatarLink::fromFilename($group->stream_logo,
 524                                                               AVATAR_STREAM_SIZE);
 525
 526             $object->avatarLinks[] = AvatarLink::fromFilename($group->mini_logo,
 527                                                               AVATAR_MINI_SIZE);
 528
 529             $object->poco = PoCo::fromGroup($group);
 530             Event::handle('EndActivityObjectFromGroup', array($group, &$object));
 531         }
 532
 533         return $object;
 534     }
 535
 536     static function fromPeopletag($ptag)
 537     {
 538         $object = new ActivityObject();
 539         if (Event::handle('StartActivityObjectFromPeopletag', array($ptag, &$object))) {
 540             $object->type    = ActivityObject::_LIST;
 541
 542             $object->id      = $ptag->getUri();
 543             $object->title   = $ptag->tag;
 544             $object->summary = $ptag->description;
 545             $object->link    = $ptag->homeUrl();
 546             $object->owner   = Profile::staticGet('id', $ptag->tagger);
 547             $object->poco    = PoCo::fromProfile($object->owner);
 548             Event::handle('EndActivityObjectFromPeopletag', array($ptag, &$object));
 549         }
 550         return $object;
 551     }
 552
 553     function outputTo($xo, $tag='activity:object')
 554     {
 555         if (!empty($tag)) {
 556             $xo->elementStart($tag);
 557         }
 558
 559         if (Event::handle('StartActivityObjectOutputAtom', array($this, $xo))) {
 560             $xo->element('activity:object-type', null, $this->type);
 561
 562             // <author> uses URI
 563
 564             if ($tag == 'author') {
 565                 $xo->element(self::URI, null, $this->id);
 566             } else {
 567                 $xo->element(self::ID, null, $this->id);
 568             }
 569
 570             if (!empty($this->title)) {
 571                 $name = common_xml_safe_str($this->title);
 572                 if ($tag == 'author') {
 573                     // XXX: Backward compatibility hack -- atom:name should contain
 574                     // full name here, instead of nickname, i.e.: $name. Change
 575                     // this in the next version.
 576                     $xo->element(self::NAME, null, $this->poco->preferredUsername);
 577                 } else {
 578                     $xo->element(self::TITLE, null, $name);
 579                 }
 580             }
 581
 582             if (!empty($this->summary)) {
 583                 $xo->element(
 584                     self::SUMMARY,
 585                     null,
 586                     common_xml_safe_str($this->summary)
 587                 );
 588             }
 589
 590             if (!empty($this->content)) {
 591                 // XXX: assuming HTML content here
 592                 $xo->element(
 593                     ActivityUtils::CONTENT,
 594                     array('type' => 'html'),
 595                     common_xml_safe_str($this->content)
 596                 );
 597             }
 598
 599             if (!empty($this->link)) {
 600                 $xo->element(
 601                     'link',
 602                     array(
 603                         'rel' => 'alternate',
 604                         'type' => 'text/html',
 605                         'href' => $this->link
 606                     ),
 607                     null
 608                 );
 609             }
 610
 611             if(!empty($this->owner)) {
 612                 $owner = $this->owner->asActivityNoun(self::AUTHOR);
 613                 $xo->raw($owner);
 614             }
 615
 616             if ($this->type == ActivityObject::PERSON
 617                 || $this->type == ActivityObject::GROUP) {
 618
 619                 foreach ($this->avatarLinks as $avatar) {
 620                     $xo->element(
 621                         'link', array(
 622                             'rel'  => 'avatar',
 623                             'type'         => $avatar->type,
 624                             'media:width'  => $avatar->width,
 625                             'media:height' => $avatar->height,
 626                             'href' => $avatar->url
 627                         ),
 628                         null
 629                     );
 630                 }
 631             }
 632
 633             if (!empty($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: attachments are added by Activity
 684
 685             // author (Add object for author? Could be useful for repeats.)
 686
 687             // content (Add rendered version of the notice?)
 688
 689             // displayName
 690             $object['displayName'] = $this->title;
 691
 692             // downstreamDuplicates
 693
 694             // id
 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                 $imgLink          = 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                 if (!array_key_exists('status_net', $object)) {
 726                     $object['status_net'] = array();
 727                 }
 728
 729                 $object['status_net']['avatarLinks'] = $avatarMediaLinks; // extension
 730
 731                 // image
 732                 if (!empty($imgLink)) {
 733                     $object['image']  = $imgLink->asArray();
 734                 }
 735             }
 736
 737             // objectType
 738             //
 739             // We can probably use the whole schema URL here but probably the
 740             // relative simple name is easier to parse
 741
 742             $object['objectType'] = ActivityObject::canonicalType($this->type);
 743
 744             // summary
 745             $object['summary'] = $this->summary;
 746
 747             // summary
 748             $object['content'] = $this->content;
 749
 750             // published (probably don't need. Might be useful for repeats.)
 751
 752             // updated (probably don't need this)
 753
 754             // TODO: upstreamDuplicates
 755
 756             // url (XXX: need to put the right thing here...)
 757             $object['url'] = $this->id;
 758
 759             /* Extensions */
 760             // @fixme these may collide with XML extensions
 761             // @fixme multiple tags of same name will overwrite each other
 762             // @fixme text content from XML extensions will be lost
 763
 764             foreach ($this->extra as $e) {
 765                 list($objectName, $props, $txt) = $e;
 766                 if (!empty($objectName)) {
 767                     $parts = explode(":", $objectName);
 768                     if (count($parts) == 2 && $parts[0] == "statusnet") {
 769                         if (!array_key_exists('status_net', $object)) {
 770                             $object['status_net'] = array();
 771                         }
 772                         $object['status_net'][$parts[1]] = $props;
 773                     } else {
 774                         $object[$objectName] = $props;
 775                     }
 776                     $object[$objectName] = $props;
 777                 }
 778             }
 779
 780             if (!empty($this->geopoint)) {
 781
 782                 list($lat, $long) = explode(' ', $this->geopoint);
 783
 784                 $object['geopoint'] = array(
 785                     'type'        => 'Point',
 786                     'coordinates' => array($lat, $long)
 787                 );
 788             }
 789
 790             if (!empty($this->poco)) {
 791                 $object['portablecontacts_net'] = array_filter($this->poco->asArray());
 792             }
 793
 794             Event::handle('EndActivityObjectOutputJson', array($this, &$object));
 795         }
 796         return array_filter($object);
 797     }
 798
 799     static function canonicalType($type) {
 800         $ns = 'http://activitystrea.ms/schema/1.0/';
 801         if (substr($type, 0, mb_strlen($ns)) == $ns) {
 802             return substr($type, mb_strlen($ns));
 803         } else {
 804             return $type;
 805         }
 806     }
 807 }