3 * StatusNet, the distributed open-source microblogging tool
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.
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.
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/>.
24 * @author Evan Prodromou <evan@status.net>
25 * @copyright 2010 StatusNet, Inc.
26 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
27 * @link http://status.net/
30 if (!defined('STATUSNET')) {
35 * Utilities for turning DOMish things into Activityish things
37 * Some common functions that I didn't have the bandwidth to try to factor
38 * into some kind of reasonable superclass, so just dumped here. Might
39 * be useful to have an ActivityObject parent class or something.
43 * @author Evan Prodromou <evan@status.net>
44 * @copyright 2010 StatusNet, Inc.
45 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
46 * @link http://status.net/
51 const ATOM = 'http://www.w3.org/2005/Atom';
59 * Get the permalink for an Activity object
61 * @param DOMElement $element A DOM element
63 * @return string related link, if any
66 static function getLink($element)
68 $links = $element->getElementsByTagnameNS(self::ATOM, self::LINK);
70 foreach ($links as $link) {
71 if ($link->getAttributeNS(self::ATOM, self::REL) == 'alternate' &&
72 $link->getAttributeNS(self::ATOM, self::TYPE) == 'text/html') {
73 return $link->getAttributeNS(self::ATOM, self::HREF);
82 * A noun-ish thing in the activity universe
84 * The activity streams spec talks about activity objects, while also having
85 * a tag activity:object, which is in fact an activity object. Aaaaaah!
87 * This is just a thing in the activity universe. Can be the subject, object,
88 * or indirect object (target!) of an activity verb. Rotten name, and I'm
89 * propagating it. *sigh*
93 * @author Evan Prodromou <evan@status.net>
94 * @copyright 2010 StatusNet, Inc.
95 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
96 * @link http://status.net/
101 const ARTICLE = 'http://activitystrea.ms/schema/1.0/article';
102 const BLOGENTRY = 'http://activitystrea.ms/schema/1.0/blog-entry';
103 const NOTE = 'http://activitystrea.ms/schema/1.0/note';
104 const STATUS = 'http://activitystrea.ms/schema/1.0/status';
105 const FILE = 'http://activitystrea.ms/schema/1.0/file';
106 const PHOTO = 'http://activitystrea.ms/schema/1.0/photo';
107 const ALBUM = 'http://activitystrea.ms/schema/1.0/photo-album';
108 const PLAYLIST = 'http://activitystrea.ms/schema/1.0/playlist';
109 const VIDEO = 'http://activitystrea.ms/schema/1.0/video';
110 const AUDIO = 'http://activitystrea.ms/schema/1.0/audio';
111 const BOOKMARK = 'http://activitystrea.ms/schema/1.0/bookmark';
112 const PERSON = 'http://activitystrea.ms/schema/1.0/person';
113 const GROUP = 'http://activitystrea.ms/schema/1.0/group';
114 const PLACE = 'http://activitystrea.ms/schema/1.0/place';
115 const COMMENT = 'http://activitystrea.ms/schema/1.0/comment';
118 // Atom elements we snarf
120 const TITLE = 'title';
121 const SUMMARY = 'summary';
122 const CONTENT = 'content';
124 const SOURCE = 'source';
140 * This probably needs to be refactored
141 * to generate a local class (ActivityPerson, ActivityFile, ...)
142 * based on the object type.
144 * @param DOMElement $element DOM thing to turn into an Activity thing
147 function __construct($element)
149 $this->source = $element;
151 if ($element->tagName == 'author') {
153 $this->type = self::PERSON; // XXX: is this fair?
154 $this->title = $this->_childContent($element, self::NAME);
155 $this->id = $this->_childContent($element, self::URI);
159 $this->type = $this->_childContent($element, Activity::OBJECTTYPE,
162 $this->id = $this->_childContent($element, self::ID);
163 $this->title = $this->_childContent($element, self::TITLE);
164 $this->summary = $this->_childContent($element, self::SUMMARY);
165 $this->content = $this->_childContent($element, self::CONTENT);
166 $this->source = $this->_childContent($element, self::SOURCE);
168 $this->link = ActivityUtils::getLink($element);
170 // XXX: grab PoCo stuff
175 * Grab the text content of a DOM element child of the current element
177 * @param DOMElement $element Element whose children we examine
178 * @param string $tag Tag to look up
179 * @param string $namespace Namespace to use, defaults to Atom
181 * @return string content of the child
184 private function _childContent($element, $tag, $namespace=Activity::ATOM)
186 $els = $element->getElementsByTagnameNS($namespace, $tag);
188 if (empty($els) || $els->length == 0) {
192 return $el->textContent;
198 * Utility class to hold a bunch of constant defining default verb types
202 * @author Evan Prodromou <evan@status.net>
203 * @copyright 2010 StatusNet, Inc.
204 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
205 * @link http://status.net/
210 const POST = 'http://activitystrea.ms/schema/1.0/post';
211 const SHARE = 'http://activitystrea.ms/schema/1.0/share';
212 const SAVE = 'http://activitystrea.ms/schema/1.0/save';
213 const FAVORITE = 'http://activitystrea.ms/schema/1.0/favorite';
214 const PLAY = 'http://activitystrea.ms/schema/1.0/play';
215 const FOLLOW = 'http://activitystrea.ms/schema/1.0/follow';
216 const FRIEND = 'http://activitystrea.ms/schema/1.0/make-friend';
217 const JOIN = 'http://activitystrea.ms/schema/1.0/join';
218 const TAG = 'http://activitystrea.ms/schema/1.0/tag';
222 * An activity in the ActivityStrea.ms world
224 * An activity is kind of like a sentence: someone did something
227 * 'someone' is the 'actor'; 'did something' is the verb;
228 * 'something else' is the object.
232 * @author Evan Prodromou <evan@status.net>
233 * @copyright 2010 StatusNet, Inc.
234 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPLv3
235 * @link http://status.net/
240 const SPEC = 'http://activitystrea.ms/spec/1.0/';
241 const SCHEMA = 'http://activitystrea.ms/schema/1.0/';
244 const OBJECT = 'object';
245 const ACTOR = 'actor';
246 const SUBJECT = 'subject';
247 const OBJECTTYPE = 'object-type';
248 const CONTEXT = 'context';
249 const TARGET = 'target';
251 const ATOM = 'http://www.w3.org/2005/Atom';
253 const AUTHOR = 'author';
254 const PUBLISHED = 'published';
256 public $actor; // an ActivityObject
257 public $verb; // a string (the URL)
258 public $object; // an ActivityObject
259 public $target; // an ActivityObject
260 public $context; // an ActivityObject
261 public $time; // Time of the activity
262 public $link; // an ActivityObject
263 public $entry; // the source entry
264 public $feed; // the source feed
267 * Turns a regular old Atom <entry> into a magical activity
269 * @param DOMElement $entry Atom entry to poke at
270 * @param DOMElement $feed Atom feed, for context
273 function __construct($entry, $feed = null)
275 $this->entry = $entry;
278 $pubEl = $this->_child($entry, self::PUBLISHED, self::ATOM);
280 if (!empty($pubEl)) {
281 $this->time = strtotime($pubEl->textContent);
283 // XXX technically an error; being liberal. Good idea...?
287 $this->link = ActivityUtils::getLink($entry);
289 $verbEl = $this->_child($entry, self::VERB);
291 if (!empty($verbEl)) {
292 $this->verb = trim($verbEl->textContent);
294 $this->verb = ActivityVerb::POST;
295 // XXX: do other implied stuff here
298 $objectEl = $this->_child($entry, self::OBJECT);
300 if (!empty($objectEl)) {
301 $this->object = new ActivityObject($objectEl);
303 $this->object = new ActivityObject($entry);
306 $actorEl = $this->_child($entry, self::ACTOR);
308 if (!empty($actorEl)) {
310 $this->actor = new ActivityObject($actorEl);
312 } else if (!empty($feed) &&
313 $subjectEl = $this->_child($feed, self::SUBJECT)) {
315 $this->actor = new ActivityObject($subjectEl);
317 } else if ($authorEl = $this->_child($entry, self::AUTHOR, self::ATOM)) {
319 $this->actor = new ActivityObject($authorEl);
322 $contextEl = $this->_child($entry, self::CONTEXT);
324 if (!empty($contextEl)) {
325 $this->context = new ActivityObject($contextEl);
328 $targetEl = $this->_child($entry, self::TARGET);
330 if (!empty($targetEl)) {
331 $this->target = new ActivityObject($targetEl);
336 * Returns an Atom <entry> based on this activity
338 * @return DOMElement Atom entry
341 function toAtomEntry()
347 * Gets the first child element with the given tag
349 * @param DOMElement $element element to pick at
350 * @param string $tag tag to look for
351 * @param string $namespace Namespace to look under
353 * @return DOMElement found element or null
356 private function _child($element, $tag, $namespace=self::SPEC)
358 $els = $element->getElementsByTagnameNS($namespace, $tag);
360 if (empty($els) || $els->length == 0) {
363 return $els->item(0);