gnu-social/lib/activityobject.php
Mikael Nordfeldth 802734d07e Switch order of html/text for StatusNet backwards compatibility
StatusNet chooses the first content element in an Atom feed, while
it should really choose the 'html' representation for its 'rendered'
and 'text' representation for the (text-only) 'content'.

GNU social will implement a better algorithm for retrieving Atom
feeds, but that is yet to be done. So to avoid having link-less posts
on remote nodes, we'll just do the old switch-a-roo.

Other Atom readers, such as Mozilla Firefox, has the reverse priority
(choosing the last of the content elements).
2013-10-20 12:50:27 +02:00

999 lines
32 KiB
PHP

<?php
/**
* StatusNet, the distributed open-source microblogging tool
*
* An activity
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Feed
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @author Zach Copley <zach@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
* @link http://status.net/
*/
if (!defined('STATUSNET')) {
exit(1);
}
/**
* A noun-ish thing in the activity universe
*
* The activity streams spec talks about activity objects, while also having
* a tag activity:object, which is in fact an activity object. Aaaaaah!
*
* This is just a thing in the activity universe. Can be the subject, object,
* or indirect object (target!) of an activity verb. Rotten name, and I'm
* propagating it. *sigh*
*
* @category OStatus
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @copyright 2010 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
* @link http://status.net/
*/
class ActivityObject
{
const ARTICLE = 'http://activitystrea.ms/schema/1.0/article';
const BLOGENTRY = 'http://activitystrea.ms/schema/1.0/blog-entry';
const NOTE = 'http://activitystrea.ms/schema/1.0/note';
const STATUS = 'http://activitystrea.ms/schema/1.0/status';
const FILE = 'http://activitystrea.ms/schema/1.0/file';
const PHOTO = 'http://activitystrea.ms/schema/1.0/photo';
const ALBUM = 'http://activitystrea.ms/schema/1.0/photo-album';
const PLAYLIST = 'http://activitystrea.ms/schema/1.0/playlist';
const VIDEO = 'http://activitystrea.ms/schema/1.0/video';
const AUDIO = 'http://activitystrea.ms/schema/1.0/audio';
const BOOKMARK = 'http://activitystrea.ms/schema/1.0/bookmark';
const PERSON = 'http://activitystrea.ms/schema/1.0/person';
const GROUP = 'http://activitystrea.ms/schema/1.0/group';
const _LIST = 'http://activitystrea.ms/schema/1.0/list'; // LIST is reserved
const PLACE = 'http://activitystrea.ms/schema/1.0/place';
const COMMENT = 'http://activitystrea.ms/schema/1.0/comment';
// ^^^^^^^^^^ tea!
const ACTIVITY = 'http://activitystrea.ms/schema/1.0/activity';
const SERVICE = 'http://activitystrea.ms/schema/1.0/service';
const IMAGE = 'http://activitystrea.ms/schema/1.0/image';
const COLLECTION = 'http://activitystrea.ms/schema/1.0/collection';
const APPLICATION = 'http://activitystrea.ms/schema/1.0/application';
// Atom elements we snarf
const TITLE = 'title';
const SUMMARY = 'summary';
const ID = 'id';
const SOURCE = 'source';
const NAME = 'name';
const URI = 'uri';
const EMAIL = 'email';
const POSTEROUS = 'http://posterous.com/help/rss/1.0';
const AUTHOR = 'author';
const USERIMAGE = 'userImage';
const PROFILEURL = 'profileUrl';
const NICKNAME = 'nickName';
const DISPLAYNAME = 'displayName';
public $element;
public $type;
public $id;
public $title;
public $summary;
public $content;
public $owner;
public $link;
public $source;
public $avatarLinks = array();
public $geopoint;
public $poco;
public $displayName;
// @todo move this stuff to it's own PHOTO activity object
const MEDIA_DESCRIPTION = 'description';
public $thumbnail;
public $largerImage;
public $description;
public $extra = array();
public $stream;
/**
* Constructor
*
* This probably needs to be refactored
* to generate a local class (ActivityPerson, ActivityFile, ...)
* based on the object type.
*
* @param DOMElement $element DOM thing to turn into an Activity thing
*/
function __construct($element = null)
{
if (empty($element)) {
return;
}
$this->element = $element;
$this->geopoint = $this->_childContent(
$element,
ActivityContext::POINT,
ActivityContext::GEORSS
);
if ($element->tagName == 'author') {
$this->_fromAuthor($element);
} else if ($element->tagName == 'item') {
$this->_fromRssItem($element);
} else {
$this->_fromAtomEntry($element);
}
// Some per-type attributes...
if ($this->type == self::PERSON || $this->type == self::GROUP) {
$this->displayName = $this->title;
$photos = ActivityUtils::getLinks($element, 'photo');
if (count($photos)) {
foreach ($photos as $link) {
$this->avatarLinks[] = new AvatarLink($link);
}
} else {
$avatars = ActivityUtils::getLinks($element, 'avatar');
foreach ($avatars as $link) {
$this->avatarLinks[] = new AvatarLink($link);
}
}
$this->poco = new PoCo($element);
}
if ($this->type == self::PHOTO) {
$this->thumbnail = ActivityUtils::getLink($element, 'preview');
$this->largerImage = ActivityUtils::getLink($element, 'enclosure');
$this->description = ActivityUtils::childContent(
$element,
ActivityObject::MEDIA_DESCRIPTION,
Activity::MEDIA
);
}
if ($this->type == self::_LIST) {
$owner = ActivityUtils::child($this->element, Activity::AUTHOR, Activity::SPEC);
$this->owner = new ActivityObject($owner);
}
}
private function _fromAuthor($element)
{
$this->type = $this->_childContent($element,
Activity::OBJECTTYPE,
Activity::SPEC);
if (empty($this->type)) {
$this->type = self::PERSON; // XXX: is this fair?
}
// start with <atom:title>
$title = ActivityUtils::childHtmlContent($element, self::TITLE);
if (!empty($title)) {
$this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
}
// fall back to <atom:name>
if (empty($this->title)) {
$this->title = $this->_childContent($element, self::NAME);
}
// start with <atom:id>
$this->id = $this->_childContent($element, self::ID);
// fall back to <atom:uri>
if (empty($this->id)) {
$this->id = $this->_childContent($element, self::URI);
}
// fall further back to <atom:email>
if (empty($this->id)) {
$email = $this->_childContent($element, self::EMAIL);
if (!empty($email)) {
// XXX: acct: ?
$this->id = 'mailto:'.$email;
}
}
$this->link = ActivityUtils::getPermalink($element);
// fall finally back to <link rel=alternate>
if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
$this->id = $this->link;
}
}
private function _fromAtomEntry($element)
{
$this->type = $this->_childContent($element, Activity::OBJECTTYPE,
Activity::SPEC);
if (empty($this->type)) {
$this->type = ActivityObject::NOTE;
}
$this->summary = ActivityUtils::childHtmlContent($element, self::SUMMARY);
$this->content = ActivityUtils::getContent($element);
// We don't like HTML in our titles, although it's technically allowed
$title = ActivityUtils::childHtmlContent($element, self::TITLE);
$this->title = html_entity_decode(strip_tags($title), ENT_QUOTES, 'UTF-8');
$this->source = $this->_getSource($element);
$this->link = ActivityUtils::getPermalink($element);
$this->id = $this->_childContent($element, self::ID);
if (empty($this->id) && !empty($this->link)) { // fallback if there's no ID
$this->id = $this->link;
}
}
// @todo FIXME: rationalize with Activity::_fromRssItem()
private function _fromRssItem($item)
{
$this->title = ActivityUtils::childContent($item, ActivityObject::TITLE, Activity::RSS);
$contentEl = ActivityUtils::child($item, ActivityUtils::CONTENT, Activity::CONTENTNS);
if (!empty($contentEl)) {
$this->content = htmlspecialchars_decode($contentEl->textContent, ENT_QUOTES);
} else {
$descriptionEl = ActivityUtils::child($item, Activity::DESCRIPTION, Activity::RSS);
if (!empty($descriptionEl)) {
$this->content = htmlspecialchars_decode($descriptionEl->textContent, ENT_QUOTES);
}
}
$this->link = ActivityUtils::childContent($item, ActivityUtils::LINK, Activity::RSS);
$guidEl = ActivityUtils::child($item, Activity::GUID, Activity::RSS);
if (!empty($guidEl)) {
$this->id = $guidEl->textContent;
if ($guidEl->hasAttribute('isPermaLink')) {
// overwrites <link>
$this->link = $this->id;
}
}
}
public static function fromRssAuthor($el)
{
$text = $el->textContent;
if (preg_match('/^(.*?) \((.*)\)$/', $text, $match)) {
$email = $match[1];
$name = $match[2];
} else if (preg_match('/^(.*?) <(.*)>$/', $text, $match)) {
$name = $match[1];
$email = $match[2];
} else if (preg_match('/.*@.*/', $text)) {
$email = $text;
$name = null;
} else {
$name = $text;
$email = null;
}
// Not really enough info
$obj = new ActivityObject();
$obj->element = $el;
$obj->type = ActivityObject::PERSON;
$obj->title = $name;
if (!empty($email)) {
$obj->id = 'mailto:'.$email;
}
return $obj;
}
public static function fromDcCreator($el)
{
// Not really enough info
$text = $el->textContent;
$obj = new ActivityObject();
$obj->element = $el;
$obj->title = $text;
$obj->type = ActivityObject::PERSON;
return $obj;
}
public static function fromRssChannel($el)
{
$obj = new ActivityObject();
$obj->element = $el;
$obj->type = ActivityObject::PERSON; // @fixme guess better
$obj->title = ActivityUtils::childContent($el, ActivityObject::TITLE, Activity::RSS);
$obj->link = ActivityUtils::childContent($el, ActivityUtils::LINK, Activity::RSS);
$obj->id = ActivityUtils::getLink($el, Activity::SELF);
if (empty($obj->id)) {
$obj->id = $obj->link;
}
$desc = ActivityUtils::childContent($el, Activity::DESCRIPTION, Activity::RSS);
if (!empty($desc)) {
$obj->content = htmlspecialchars_decode($desc, ENT_QUOTES);
}
$imageEl = ActivityUtils::child($el, Activity::IMAGE, Activity::RSS);
if (!empty($imageEl)) {
$url = ActivityUtils::childContent($imageEl, Activity::URL, Activity::RSS);
$al = new AvatarLink();
$al->url = $url;
$obj->avatarLinks[] = $al;
}
return $obj;
}
public static function fromPosterousAuthor($el)
{
$obj = new ActivityObject();
$obj->type = ActivityObject::PERSON; // @fixme any others...?
$userImage = ActivityUtils::childContent($el, self::USERIMAGE, self::POSTEROUS);
if (!empty($userImage)) {
$al = new AvatarLink();
$al->url = $userImage;
$obj->avatarLinks[] = $al;
}
$obj->link = ActivityUtils::childContent($el, self::PROFILEURL, self::POSTEROUS);
$obj->id = $obj->link;
$obj->poco = new PoCo();
$obj->poco->preferredUsername = ActivityUtils::childContent($el, self::NICKNAME, self::POSTEROUS);
$obj->poco->displayName = ActivityUtils::childContent($el, self::DISPLAYNAME, self::POSTEROUS);
$obj->title = $obj->poco->displayName;
return $obj;
}
private function _childContent($element, $tag, $namespace=ActivityUtils::ATOM)
{
return ActivityUtils::childContent($element, $tag, $namespace);
}
// Try to get a unique id for the source feed
private function _getSource($element)
{
$sourceEl = ActivityUtils::child($element, 'source');
if (empty($sourceEl)) {
return null;
} else {
$href = ActivityUtils::getLink($sourceEl, 'self');
if (!empty($href)) {
return $href;
} else {
return ActivityUtils::childContent($sourceEl, 'id');
}
}
}
static function fromNotice(Notice $notice)
{
$object = new ActivityObject();
if (Event::handle('StartActivityObjectFromNotice', array($notice, &$object))) {
$object->type = (empty($notice->object_type)) ? ActivityObject::NOTE : $notice->object_type;
$object->id = $notice->uri;
$object->title = 'New ' . ActivityObject::canonicalType($notice->object_type);
$object->content = $notice->rendered;
$object->link = $notice->bestUrl();
$object->extra[] = array('status_net', array('notice_id' => $notice->id));
Event::handle('EndActivityObjectFromNotice', array($notice, &$object));
}
return $object;
}
static function fromProfile(Profile $profile)
{
$object = new ActivityObject();
if (Event::handle('StartActivityObjectFromProfile', array($profile, &$object))) {
$object->type = ActivityObject::PERSON;
$object->id = $profile->getUri();
$object->title = $profile->getBestName();
$object->link = $profile->profileurl;
try {
$avatar = Avatar::getUploaded($profile);
$object->avatarLinks[] = AvatarLink::fromAvatar($avatar);
} catch (NoAvatarException $e) {
// Could not find an original avatar to link
}
$sizes = array(
AVATAR_PROFILE_SIZE,
AVATAR_STREAM_SIZE,
AVATAR_MINI_SIZE
);
foreach ($sizes as $size) {
$alink = null;
try {
$avatar = Avatar::byProfile($profile, $size);
$alink = AvatarLink::fromAvatar($avatar);
} catch (NoAvatarException $e) {
$alink = new AvatarLink();
$alink->type = 'image/png';
$alink->height = $size;
$alink->width = $size;
$alink->url = Avatar::defaultImage($size);
}
$object->avatarLinks[] = $alink;
}
if (isset($profile->lat) && isset($profile->lon)) {
$object->geopoint = (float)$profile->lat
. ' ' . (float)$profile->lon;
}
$object->poco = PoCo::fromProfile($profile);
if ($profile->isLocal()) {
$object->extra[] = array('followers', array('url' => common_local_url('subscribers', array('nickname' => $profile->nickname))));
}
Event::handle('EndActivityObjectFromProfile', array($profile, &$object));
}
return $object;
}
static function fromGroup(User_group $group)
{
$object = new ActivityObject();
if (Event::handle('StartActivityObjectFromGroup', array($group, &$object))) {
$object->type = ActivityObject::GROUP;
$object->id = $group->getUri();
$object->title = $group->getBestName();
$object->link = $group->getUri();
$object->avatarLinks[] = AvatarLink::fromFilename($group->homepage_logo,
AVATAR_PROFILE_SIZE);
$object->avatarLinks[] = AvatarLink::fromFilename($group->stream_logo,
AVATAR_STREAM_SIZE);
$object->avatarLinks[] = AvatarLink::fromFilename($group->mini_logo,
AVATAR_MINI_SIZE);
$object->poco = PoCo::fromGroup($group);
Event::handle('EndActivityObjectFromGroup', array($group, &$object));
}
return $object;
}
static function fromPeopletag($ptag)
{
$object = new ActivityObject();
if (Event::handle('StartActivityObjectFromPeopletag', array($ptag, &$object))) {
$object->type = ActivityObject::_LIST;
$object->id = $ptag->getUri();
$object->title = $ptag->tag;
$object->summary = $ptag->description;
$object->link = $ptag->homeUrl();
$object->owner = Profile::getKV('id', $ptag->tagger);
$object->poco = PoCo::fromProfile($object->owner);
Event::handle('EndActivityObjectFromPeopletag', array($ptag, &$object));
}
return $object;
}
static function fromFile(File $file)
{
$object = new ActivityObject();
if (Event::handle('StartActivityObjectFromFile', array($file, &$object))) {
$object->type = self::mimeTypeToObjectType($file->mimetype);
$object->id = TagURI::mint(sprintf("file:%d", $file->id));
$object->link = common_local_url('attachment', array('attachment' => $file->id));
if ($file->title) {
$object->title = $file->title;
}
if ($file->date) {
$object->date = $file->date;
}
$thumbnail = $file->getThumbnail();
if (!empty($thumbnail)) {
$object->thumbnail = $thumbnail;
}
switch (ActivityObject::canonicalType($object->type)) {
case 'image':
$object->largerImage = $file->url;
break;
case 'video':
case 'audio':
$object->stream = $file->url;
break;
}
Event::handle('EndActivityObjectFromFile', array($file, &$object));
}
return $object;
}
static function fromNoticeSource(Notice_source $source)
{
$object = new ActivityObject();
$wellKnown = array('web', 'xmpp', 'mail', 'omb', 'system', 'api', 'ostatus',
'activity', 'feed', 'mirror', 'twitter', 'facebook');
if (Event::handle('StartActivityObjectFromNoticeSource', array($source, &$object))) {
$object->type = ActivityObject::APPLICATION;
if (in_array($source->code, $wellKnown)) {
// We use one ID for all well-known StatusNet sources
$object->id = "tag:status.net,2009:notice-source:".$source->code;
} else if ($source->url) {
// They registered with an URL
$object->id = $source->url;
} else {
// Locally-registered, no URL
$object->id = TagURI::mint("notice-source:".$source->code);
}
if ($source->url) {
$object->link = $source->url;
}
if ($source->name) {
$object->title = $source->name;
} else {
$object->title = $source->code;
}
if ($source->created) {
$object->date = $source->created;
}
$object->extra[] = array('status_net', array('source_code' => $source->code));
Event::handle('EndActivityObjectFromNoticeSource', array($source, &$object));
}
return $object;
}
static function fromMessage(Message $message)
{
$object = new ActivityObject();
if (Event::handle('StartActivityObjectFromMessage', array($message, &$object))) {
$object->type = ActivityObject::NOTE;
$object->id = ($message->uri) ? $message->uri : (($message->url) ? $message->url : TagURI::mint(sprintf("message:%d", $message->id)));
$object->content = $message->rendered;
$object->date = $message->created;
if ($message->url) {
$object->link = $message->url;
} else {
$object->link = common_local_url('showmessage', array('message' => $message->id));
}
$object->extra[] = array('status_net', array('message_id' => $message->id));
Event::handle('EndActivityObjectFromMessage', array($message, &$object));
}
return $object;
}
function outputTo($xo, $tag='activity:object')
{
if (!empty($tag)) {
$xo->elementStart($tag);
}
if (Event::handle('StartActivityObjectOutputAtom', array($this, $xo))) {
$xo->element('activity:object-type', null, $this->type);
// <author> uses URI
if ($tag == 'author') {
$xo->element(self::URI, null, $this->id);
} else {
$xo->element(self::ID, null, $this->id);
}
if (!empty($this->title)) {
$name = common_xml_safe_str($this->title);
if ($tag == 'author') {
// XXX: Backward compatibility hack -- atom:name should contain
// full name here, instead of nickname, i.e.: $name. Change
// this in the next version.
$xo->element(self::NAME, null, $this->poco->preferredUsername);
} else {
$xo->element(self::TITLE, null, $name);
}
}
if (!empty($this->summary)) {
$xo->element(
self::SUMMARY,
null,
common_xml_safe_str($this->summary)
);
}
if (!empty($this->content)) {
// XXX: assuming HTML content here
$xo->element(
ActivityUtils::CONTENT,
array('type' => 'html'),
common_xml_safe_str($this->content)
);
$xo->element(
ActivityUtils::CONTENT,
array('type' => 'text'),
html_entity_decode(strip_tags($this->content), ENT_QUOTES, 'UTF-8')
);
}
if (!empty($this->link)) {
$xo->element(
'link',
array(
'rel' => 'alternate',
'type' => 'text/html',
'href' => $this->link
),
null
);
}
if(!empty($this->owner)) {
$owner = $this->owner->asActivityNoun(self::AUTHOR);
$xo->raw($owner);
}
if ($this->type == ActivityObject::PERSON
|| $this->type == ActivityObject::GROUP) {
foreach ($this->avatarLinks as $alink) {
$xo->element('link',
array(
'rel' => 'avatar',
'type' => $alink->type,
'media:width' => $alink->width,
'media:height' => $alink->height,
'href' => $alink->url,
),
null);
}
}
if (!empty($this->geopoint)) {
$xo->element(
'georss:point',
null,
$this->geopoint
);
}
if (!empty($this->poco)) {
$this->poco->outputTo($xo);
}
// @fixme there's no way here to make a tree; elements can only contain plaintext
// @fixme these may collide with JSON extensions
foreach ($this->extra as $el) {
list($extraTag, $attrs, $content) = array_pad($el, 3, null);
$xo->element($extraTag, $attrs, $content);
}
Event::handle('EndActivityObjectOutputAtom', array($this, $xo));
}
if (!empty($tag)) {
$xo->elementEnd($tag);
}
return;
}
function asString($tag='activity:object')
{
$xs = new XMLStringer(true);
$this->outputTo($xs, $tag);
return $xs->getString();
}
/*
* Returns an array based on this Activity Object suitable for
* encoding as JSON.
*
* @return array $object the activity object array
*/
function asArray()
{
$object = array();
if (Event::handle('StartActivityObjectOutputJson', array($this, &$object))) {
// XXX: attachments are added by Activity
// author (Add object for author? Could be useful for repeats.)
// content (Add rendered version of the notice?)
// downstreamDuplicates
// id
if ($this->id) {
$object['id'] = $this->id;
} else if ($this->link) {
$object['id'] = $this->link;
}
if ($this->type == ActivityObject::PERSON
|| $this->type == ActivityObject::GROUP) {
// displayName
$object['displayName'] = $this->title;
// XXX: Not sure what the best avatar is to use for the
// author's "image". For now, I'm using the large size.
$imgLink = null;
$avatarMediaLinks = array();
foreach ($this->avatarLinks as $a) {
// Make a MediaLink for every other Avatar
$avatar = new ActivityStreamsMediaLink(
$a->url,
$a->width,
$a->height,
$a->type,
'avatar'
);
// Find the big avatar to use as the "image"
if ($a->height == AVATAR_PROFILE_SIZE) {
$imgLink = $avatar;
}
$avatarMediaLinks[] = $avatar->asArray();
}
if (!array_key_exists('status_net', $object)) {
$object['status_net'] = array();
}
$object['status_net']['avatarLinks'] = $avatarMediaLinks; // extension
// image
if (!empty($imgLink)) {
$object['image'] = $imgLink->asArray();
}
}
// objectType
//
// We can probably use the whole schema URL here but probably the
// relative simple name is easier to parse
$object['objectType'] = ActivityObject::canonicalType($this->type);
// summary
$object['summary'] = $this->summary;
// content, usually rendered HTML
$object['content'] = $this->content;
// published (probably don't need. Might be useful for repeats.)
// updated (probably don't need this)
// TODO: upstreamDuplicates
if ($this->link) {
$object['url'] = $this->link;
}
/* Extensions */
// @fixme these may collide with XML extensions
// @fixme multiple tags of same name will overwrite each other
// @fixme text content from XML extensions will be lost
foreach ($this->extra as $e) {
list($objectName, $props, $txt) = array_pad($e, 3, null);
if (!empty($objectName)) {
$parts = explode(":", $objectName);
if (count($parts) == 2 && $parts[0] == "statusnet") {
if (!array_key_exists('status_net', $object)) {
$object['status_net'] = array();
}
$object['status_net'][$parts[1]] = $props;
} else {
$object[$objectName] = $props;
}
}
}
if (!empty($this->geopoint)) {
list($lat, $lon) = explode(' ', $this->geopoint);
if (!empty($lat) && !empty($lon)) {
$object['location'] = array(
'objectType' => 'place',
'position' => sprintf("%+02.5F%+03.5F/", $lat, $lon),
'lat' => $lat,
'lon' => $lon
);
$loc = Location::fromLatLon((float)$lat, (float)$lon);
if ($loc) {
$name = $loc->getName();
if ($name) {
$object['location']['displayName'] = $name;
}
$url = $loc->getURL();
if ($url) {
$object['location']['url'] = $url;
}
}
}
}
if (!empty($this->poco)) {
$object['portablecontacts_net'] = array_filter($this->poco->asArray());
}
if (!empty($this->thumbnail)) {
if (is_string($this->thumbnail)) {
$object['image'] = array('url' => $this->thumbnail);
} else {
$object['image'] = array('url' => $this->thumbnail->url);
if ($this->thumbnail->width) {
$object['image']['width'] = $this->thumbnail->width;
}
if ($this->thumbnail->height) {
$object['image']['height'] = $this->thumbnail->height;
}
}
}
switch (ActivityObject::canonicalType($this->type)) {
case 'image':
if (!empty($this->largerImage)) {
$object['fullImage'] = array('url' => $this->largerImage);
}
break;
case 'audio':
case 'video':
if (!empty($this->stream)) {
$object['stream'] = array('url' => $this->stream);
}
break;
}
Event::handle('EndActivityObjectOutputJson', array($this, &$object));
}
return array_filter($object);
}
static function canonicalType($type) {
$ns = 'http://activitystrea.ms/schema/1.0/';
if (substr($type, 0, mb_strlen($ns)) == $ns) {
return substr($type, mb_strlen($ns));
} else {
return $type;
}
}
static function mimeTypeToObjectType($mimeType) {
$ot = null;
// Default
if (empty($mimeType)) {
return self::FILE;
}
$parts = explode('/', $mimeType);
switch ($parts[0]) {
case 'image':
$ot = self::IMAGE;
break;
case 'audio':
$ot = self::AUDIO;
break;
case 'video':
$ot = self::VIDEO;
break;
default:
$ot = self::FILE;
}
return $ot;
}
}