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             $object->type   = ActivityObject::PERSON;
 450             $object->id     = $profile->getUri();
 451             $object->title  = $profile->getBestName();
 452             $object->link   = $profile->profileurl;
 453
 454             $orig = $profile->getOriginalAvatar();
 455
 456             if (!empty($orig)) {
 457                 $object->avatarLinks[] = AvatarLink::fromAvatar($orig);
 458             }
 459
 460             $sizes = array(
 461                 AVATAR_PROFILE_SIZE,
 462                 AVATAR_STREAM_SIZE,
 463                 AVATAR_MINI_SIZE
 464             );
 465
 466             foreach ($sizes as $size) {
 467                 $alink  = null;
 468                 $avatar = $profile->getAvatar($size);
 469
 470                 if (!empty($avatar)) {
 471                     $alink = AvatarLink::fromAvatar($avatar);
 472                 } else {
 473                     $alink = new AvatarLink();
 474                     $alink->type   = 'image/png';
 475                     $alink->height = $size;
 476                     $alink->width  = $size;
 477                     $alink->url    = Avatar::defaultImage($size);
 478
 479                     if ($size == AVATAR_PROFILE_SIZE) {
 480                         // Hack for Twitter import: we don't have a 96x96 image,
 481                         // but we do have a 73x73 image. For now, fake it with that.
 482                         $avatar = $profile->getAvatar(73);
 483                         if ($avatar) {
 484                             $alink = AvatarLink::fromAvatar($avatar);
 485                             $alink->height= $size;
 486                             $alink->width = $size;
 487                         }
 488                     }
 489                 }
 490
 491                 $object->avatarLinks[] = $alink;
 492             }
 493
 494             if (isset($profile->lat) && isset($profile->lon)) {
 495                 $object->geopoint = (float)$profile->lat
 496                     . ' ' . (float)$profile->lon;
 497             }
 498
 499             $object->poco = PoCo::fromProfile($profile);
 500
 501             Event::handle('EndActivityObjectFromProfile', array($profile, &$object));
 502         }
 503
 504         return $object;
 505     }
 506
 507     static function fromGroup($group)
 508     {
 509         $object = new ActivityObject();
 510
 511         if (Event::handle('StartActivityObjectFromGroup', array($group, &$object))) {
 512
 513             $object->type   = ActivityObject::GROUP;
 514             $object->id     = $group->getUri();
 515             $object->title  = $group->getBestName();
 516             $object->link   = $group->getUri();
 517
 518             $object->avatarLinks[] = AvatarLink::fromFilename($group->homepage_logo,
 519                                                               AVATAR_PROFILE_SIZE);
 520
 521             $object->avatarLinks[] = AvatarLink::fromFilename($group->stream_logo,
 522                                                               AVATAR_STREAM_SIZE);
 523
 524             $object->avatarLinks[] = AvatarLink::fromFilename($group->mini_logo,
 525                                                               AVATAR_MINI_SIZE);
 526
 527             $object->poco = PoCo::fromGroup($group);
 528             Event::handle('EndActivityObjectFromGroup', array($group, &$object));
 529         }
 530
 531         return $object;
 532     }
 533
 534     static function fromPeopletag($ptag)
 535     {
 536         $object = new ActivityObject();
 537         if (Event::handle('StartActivityObjectFromPeopletag', array($ptag, &$object))) {
 538             $object->type    = ActivityObject::_LIST;
 539
 540             $object->id      = $ptag->getUri();
 541             $object->title   = $ptag->tag;
 542             $object->summary = $ptag->description;
 543             $object->link    = $ptag->homeUrl();
 544             $object->owner   = Profile::staticGet('id', $ptag->tagger);
 545             $object->poco    = PoCo::fromProfile($object->owner);
 546             Event::handle('EndActivityObjectFromPeopletag', array($ptag, &$object));
 547         }
 548         return $object;
 549     }
 550
 551     function outputTo($xo, $tag='activity:object')
 552     {
 553         if (!empty($tag)) {
 554             $xo->elementStart($tag);
 555         }
 556
 557         if (Event::handle('StartActivityObjectOutputAtom', array($this, $xo))) {
 558             $xo->element('activity:object-type', null, $this->type);
 559
 560             // <author> uses URI
 561
 562             if ($tag == 'author') {
 563                 $xo->element(self::URI, null, $this->id);
 564             } else {
 565                 $xo->element(self::ID, null, $this->id);
 566             }
 567
 568             if (!empty($this->title)) {
 569                 $name = common_xml_safe_str($this->title);
 570                 if ($tag == 'author') {
 571                     // XXX: Backward compatibility hack -- atom:name should contain
 572                     // full name here, instead of nickname, i.e.: $name. Change
 573                     // this in the next version.
 574                     $xo->element(self::NAME, null, $this->poco->preferredUsername);
 575                 } else {
 576                     $xo->element(self::TITLE, null, $name);
 577                 }
 578             }
 579
 580             if (!empty($this->summary)) {
 581                 $xo->element(
 582                     self::SUMMARY,
 583                     null,
 584                     common_xml_safe_str($this->summary)
 585                 );
 586             }
 587
 588             if (!empty($this->content)) {
 589                 // XXX: assuming HTML content here
 590                 $xo->element(
 591                     ActivityUtils::CONTENT,
 592                     array('type' => 'html'),
 593                     common_xml_safe_str($this->content)
 594                 );
 595             }
 596
 597             if (!empty($this->link)) {
 598                 $xo->element(
 599                     'link',
 600                     array(
 601                         'rel' => 'alternate',
 602                         'type' => 'text/html',
 603                         'href' => $this->link
 604                     ),
 605                     null
 606                 );
 607             }
 608
 609             if(!empty($this->owner)) {
 610                 $owner = $this->owner->asActivityNoun(self::AUTHOR);
 611                 $xo->raw($owner);
 612             }
 613
 614             if ($this->type == ActivityObject::PERSON
 615                 || $this->type == ActivityObject::GROUP) {
 616
 617                 foreach ($this->avatarLinks as $avatar) {
 618                     $xo->element(
 619                         'link', array(
 620                             'rel'  => 'avatar',
 621                             'type'         => $avatar->type,
 622                             'media:width'  => $avatar->width,
 623                             'media:height' => $avatar->height,
 624                             'href' => $avatar->url
 625                         ),
 626                         null
 627                     );
 628                 }
 629             }
 630
 631             if (!empty($this->geopoint)) {
 632                 $xo->element(
 633                     'georss:point',
 634                     null,
 635                     $this->geopoint
 636                 );
 637             }
 638
 639             if (!empty($this->poco)) {
 640                 $this->poco->outputTo($xo);
 641             }
 642
 643             // @fixme there's no way here to make a tree; elements can only contain plaintext
 644             // @fixme these may collide with JSON extensions
 645             foreach ($this->extra as $el) {
 646                 list($extraTag, $attrs, $content) = $el;
 647                 $xo->element($extraTag, $attrs, $content);
 648             }
 649
 650             Event::handle('EndActivityObjectOutputAtom', array($this, $xo));
 651         }
 652
 653         if (!empty($tag)) {
 654             $xo->elementEnd($tag);
 655         }
 656
 657         return;
 658     }
 659
 660     function asString($tag='activity:object')
 661     {
 662         $xs = new XMLStringer(true);
 663
 664         $this->outputTo($xs, $tag);
 665
 666         return $xs->getString();
 667     }
 668
 669     /*
 670      * Returns an array based on this Activity Object suitable for
 671      * encoding as JSON.
 672      *
 673      * @return array $object the activity object array
 674      */
 675
 676     function asArray()
 677     {
 678         $object = array();
 679
 680         if (Event::handle('StartActivityObjectOutputJson', array($this, &$object))) {
 681             // XXX: attachedObjects are added by Activity
 682
 683             // displayName
 684             $object['displayName'] = $this->title;
 685
 686             // TODO: downstreamDuplicates
 687
 688             // embedCode (used for video)
 689
 690             // id
 691             //
 692             // XXX: Should we use URL here? or a crazy tag URI?
 693             $object['id'] = $this->id;
 694
 695             if ($this->type == ActivityObject::PERSON
 696                 || $this->type == ActivityObject::GROUP) {
 697
 698                 // XXX: Not sure what the best avatar is to use for the
 699                 // author's "image". For now, I'm using the large size.
 700
 701                 $avatarLarge      = null;
 702                 $avatarMediaLinks = array();
 703
 704                 foreach ($this->avatarLinks as $a) {
 705
 706                     // Make a MediaLink for every other Avatar
 707                     $avatar = new ActivityStreamsMediaLink(
 708                         $a->url,
 709                         $a->width,
 710                         $a->height,
 711                         $a->type,
 712                         'avatar'
 713                     );
 714
 715                     // Find the big avatar to use as the "image"
 716                     if ($a->height == AVATAR_PROFILE_SIZE) {
 717                         $imgLink = $avatar;
 718                     }
 719
 720                     $avatarMediaLinks[] = $avatar->asArray();
 721                 }
 722
 723                 $object['avatarLinks'] = $avatarMediaLinks; // extension
 724
 725                 // image
 726                 $object['image']  = $imgLink->asArray();
 727             }
 728
 729             // objectType
 730             //
 731             // We can probably use the whole schema URL here but probably the
 732             // relative simple name is easier to parse
 733             // @fixme this breaks extension URIs
 734             $object['type'] = substr($this->type, strrpos($this->type, '/') + 1);
 735
 736             // summary
 737             $object['summary'] = $this->summary;
 738
 739             // TODO: upstreamDuplicates
 740
 741             // url (XXX: need to put the right thing here...)
 742             $object['url'] = $this->id;
 743
 744             /* Extensions */
 745             // @fixme these may collide with XML extensions
 746             // @fixme multiple tags of same name will overwrite each other
 747             // @fixme text content from XML extensions will be lost
 748             foreach ($this->extra as $e) {
 749                 list($objectName, $props, $txt) = $e;
 750                 $object[$objectName] = $props;
 751             }
 752
 753             // GeoJSON
 754
 755             if (!empty($this->geopoint)) {
 756
 757                 list($lat, $long) = explode(' ', $this->geopoint);
 758
 759                 $object['geopoint'] = array(
 760                     'type'        => 'Point',
 761                     'coordinates' => array($lat, $long)
 762                 );
 763             }
 764
 765             if (!empty($this->poco)) {
 766                 $object['contact'] = $this->poco->asArray();
 767             }
 768             Event::handle('EndActivityObjectOutputJson', array($this, &$object));
 769         }
 770         return array_filter($object);
 771     }
 772 }