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Favorite plugin now "extends" Activity on NoticeAsActivity
[quix0rs-gnu-social.git] / plugins / Favorite / classes / Fave.php
1 <?php
2 /**
3  * Table Definition for fave
4  */
5
6 class Fave extends Managed_DataObject
7 {
8     public $__table = 'fave';                            // table name
9     public $notice_id;                       // int(4)  primary_key not_null
10     public $user_id;                         // int(4)  primary_key not_null
11     public $uri;                             // varchar(255)
12     public $created;                         // datetime  multiple_key not_null
13     public $modified;                        // timestamp()   not_null default_CURRENT_TIMESTAMP
14
15     public static function schemaDef()
16     {
17         return array(
18             'fields' => array(
19                 'notice_id' => array('type' => 'int', 'not null' => true, 'description' => 'notice that is the favorite'),
20                 'user_id' => array('type' => 'int', 'not null' => true, 'description' => 'user who likes this notice'),
21                 'uri' => array('type' => 'varchar', 'length' => 255, 'description' => 'universally unique identifier, usually a tag URI'),
22                 'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'),
23                 'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'),
24             ),
25             'primary key' => array('notice_id', 'user_id'),
26             'unique keys' => array(
27                 'fave_uri_key' => array('uri'),
28             ),
29             'foreign keys' => array(
30                 'fave_notice_id_fkey' => array('notice', array('notice_id' => 'id')),
31                 'fave_user_id_fkey' => array('profile', array('user_id' => 'id')), // note: formerly referenced notice.id, but we can now record remote users' favorites
32             ),
33             'indexes' => array(
34                 'fave_notice_id_idx' => array('notice_id'),
35                 'fave_user_id_idx' => array('user_id', 'modified'),
36                 'fave_modified_idx' => array('modified'),
37             ),
38         );
39     }
40
41     /**
42      * Save a favorite record.
43      * @fixme post-author notification should be moved here
44      *
45      * @param Profile $profile the local or remote user who likes
46      * @param Notice $notice the notice that is liked
47      * @return mixed false on failure, or Fave record on success
48      */
49     static function addNew(Profile $profile, Notice $notice) {
50
51         $fave = null;
52
53         if (Event::handle('StartFavorNotice', array($profile, $notice, &$fave))) {
54
55             $fave = new Fave();
56
57             $fave->user_id   = $profile->id;
58             $fave->notice_id = $notice->id;
59             $fave->created   = common_sql_now();
60             $fave->modified  = common_sql_now();
61             $fave->uri       = self::newUri($profile,
62                                             $notice,
63                                             $fave->created);
64
65             try {
66                 $fave->insert();
67             } catch (ServerException $e) {
68                 common_log_db_error($fave, 'INSERT', __FILE__);
69                 return false;
70             }
71             self::blowCacheForProfileId($fave->user_id);
72             self::blowCacheForNoticeId($fave->notice_id);
73             self::blow('popular');
74
75             Event::handle('EndFavorNotice', array($profile, $notice));
76         }
77
78         return $fave;
79     }
80
81     // exception throwing takeover!
82     public function insert()
83     {
84         if (!parent::insert()) {
85             throw new ServerException(sprintf(_m('Could not store new object of type %s'), get_called_class()));
86         }
87         self::blowCacheForProfileId($this->user_id);
88         self::blowCacheForNoticeId($this->notice_id);
89         return $this;
90     }
91
92     public function delete($useWhere=false)
93     {
94         $profile = Profile::getKV('id', $this->user_id);
95         $notice  = Notice::getKV('id', $this->notice_id);
96
97         $result = null;
98
99         if (Event::handle('StartDisfavorNotice', array($profile, $notice, &$result))) {
100
101             $result = parent::delete($useWhere);
102
103             self::blowCacheForProfileId($this->user_id);
104             self::blowCacheForNoticeId($this->notice_id);
105             self::blow('popular');
106
107             if ($result) {
108                 Event::handle('EndDisfavorNotice', array($profile, $notice));
109             }
110         }
111
112         return $result;
113     }
114
115     function stream($user_id, $offset=0, $limit=NOTICES_PER_PAGE, $own=false, $since_id=0, $max_id=0)
116     {
117         $stream = new FaveNoticeStream($user_id, $own);
118
119         return $stream->getNotices($offset, $limit, $since_id, $max_id);
120     }
121
122     function idStream($user_id, $offset=0, $limit=NOTICES_PER_PAGE, $own=false, $since_id=0, $max_id=0)
123     {
124         $stream = new FaveNoticeStream($user_id, $own);
125
126         return $stream->getNoticeIds($offset, $limit, $since_id, $max_id);
127     }
128
129     function asActivity()
130     {
131         $target = $this->getTarget();
132         $actor  = $this->getActor();
133
134         $act = new Activity();
135
136         $act->verb = ActivityVerb::FAVORITE;
137
138         // FIXME: rationalize this with URL below
139
140         $act->id   = $this->getUri();
141
142         $act->time    = strtotime($this->created);
143         // TRANS: Activity title when marking a notice as favorite.
144         $act->title   = _("Favor");
145         $act->content = $target->rendered ?: $target->content;
146
147         $act->actor     = $actor->asActivityObject();
148         $act->target    = $target->asActivityObject();
149         $act->objects   = array(clone($act->target));
150
151         $url = common_local_url('AtomPubShowFavorite',
152                                           array('profile' => $actor->id,
153                                                 'notice'  => $target->id));
154
155         $act->selfLink = $url;
156         $act->editLink = $url;
157
158         return $act;
159     }
160
161     static function existsForProfile($notice, Profile $scoped)
162     {
163         $fave = self::pkeyGet(array('user_id'=>$scoped->id, 'notice_id'=>$notice->id));
164
165         return ($fave instanceof Fave);
166     }
167
168     /**
169      * Fetch a stream of favorites by profile
170      *
171      * @param integer $profileId Profile that faved
172      * @param integer $offset    Offset from last
173      * @param integer $limit     Number to get
174      *
175      * @return mixed stream of faves, use fetch() to iterate
176      *
177      * @todo Cache results
178      * @todo integrate with Fave::stream()
179      */
180
181     static function byProfile($profileId, $offset, $limit)
182     {
183         $fav = new Fave();
184
185         $fav->user_id = $profileId;
186
187         $fav->orderBy('modified DESC');
188
189         $fav->limit($offset, $limit);
190
191         $fav->find();
192
193         return $fav;
194     }
195
196     static function countByProfile(Profile $profile)
197     {
198         $c = Cache::instance();
199         if (!empty($c)) {
200             $cnt = $c->get(Cache::key('fave:count_by_profile:'.$profile->id));
201             if (is_integer($cnt)) {
202                 return $cnt;
203             }
204         }
205
206         $faves = new Fave();
207         $faves->user_id = $profile->id;
208         $cnt = (int) $faves->count('notice_id');
209
210         if (!empty($c)) {
211             $c->set(Cache::key('fave:count_by_profile:'.$profile->id), $cnt);
212         }
213
214         return $cnt;
215     }
216
217     static protected $_faves = array();
218
219     /**
220      * All faves of this notice
221      *
222      * @param Notice $notice A notice we wish to get faves for (may still be ArrayWrapper)
223      *
224      * @return array Array of Fave objects
225      */
226     static public function byNotice($notice)
227     {
228         if (!isset(self::$_faves[$notice->id])) {
229             self::fillFaves(array($notice->id));
230         }
231         return self::$_faves[$notice->id];
232     }
233
234     static public function fillFaves(array $notice_ids)
235     {
236         $faveMap = Fave::listGet('notice_id', $notice_ids);
237         self::$_faves = array_replace(self::$_faves, $faveMap);
238     }
239
240     static public function blowCacheForProfileId($profile_id)
241     {
242         $cache = Cache::instance();
243         if ($cache) {
244             // Faves don't happen chronologically, so we need to blow
245             // ;last cache, too
246             $cache->delete(Cache::key('fave:ids_by_user:'.$profile_id));
247             $cache->delete(Cache::key('fave:ids_by_user:'.$profile_id.';last'));
248             $cache->delete(Cache::key('fave:ids_by_user_own:'.$profile_id));
249             $cache->delete(Cache::key('fave:ids_by_user_own:'.$profile_id.';last'));
250             $cache->delete(Cache::key('fave:count_by_profile:'.$profile_id));
251         }
252     }
253     static public function blowCacheForNoticeId($notice_id)
254     {
255         $cache = Cache::instance();
256         if ($cache) {
257             $cache->delete(Cache::key('fave:list-ids:notice_id:'.$notice_id));
258         }
259     }
260
261     // Remember that we want the _activity_ notice here, not faves applied
262     // to the supplied Notice (as with byNotice)!
263     static public function fromStored(Notice $stored)
264     {
265         $class = get_called_class();
266         $object = new $class;
267         $object->uri = $stored->uri;
268         if (!$object->find(true)) {
269             throw new NoResultException($object);
270         }
271         return $object;
272     }
273
274     /**
275      * Retrieves the _targeted_ notice of a verb (such as the notice that was
276      * _favorited_, but not the favorite activity itself).
277      *
278      * @param Notice $stored    The activity notice.
279      *
280      * @throws NoResultException when it can't find what it's looking for.
281      */
282     static public function getTargetFromStored(Notice $stored)
283     {
284         return self::fromStored($stored)->getTarget();
285     }
286
287     static public function getObjectType()
288     {
289         return 'activity';
290     }
291
292     public function asActivityObject(Profile $scoped=null)
293     {
294         $actobj = new ActivityObject();
295         $actobj->id = $this->getUri();
296         $actobj->type = ActivityUtils::resolveUri(self::getObjectType());
297         $actobj->actor = $this->getActorObject();
298         $actobj->target = $this->getTargetObject();
299         $actobj->objects = array(clone($actobj->target));
300         $actobj->verb = ActivityVerb::FAVORITE;
301         $actobj->title = ActivityUtils::verbToTitle($actobj->verb);
302         $actobj->content = $this->getTarget()->rendered ?: $this->getTarget()->content;
303         return $actobj;
304     }
305
306     /**
307      * @param ActivityObject $actobj The _favored_ notice (which we're "in-reply-to")
308      * @param Notice         $stored The _activity_ notice, i.e. the favor itself.
309      */
310     static public function parseActivityObject(ActivityObject $actobj, Notice $stored)
311     {
312         $local = ActivityUtils::findLocalObject($actobj->getIdentifiers());
313         if (!$local instanceof Notice) {
314             // $local always returns something, but this was not what we expected. Something is wrong.
315             throw new Exception('Something other than a Notice was returned from findLocalObject');
316         }
317  
318         $actor = $stored->getProfile();
319         $object = new Fave();
320         $object->user_id = $stored->getProfile()->id;
321         $object->notice_id = $local->id;
322         $object->uri = $stored->uri;
323         $object->created = $stored->created;
324         $object->modified = $stored->modified;
325         return $object;
326     }
327
328     static public function extendActivity(Notice $stored, Activity $act, Profile $scoped=null)
329     {
330         $target = self::getTargetFromStored($stored);
331
332         $act->target = $target->asActivityObject();
333         $act->objects = array(clone($act->target));
334         $act->context->replyToID = $target->getUri();
335         $act->context->replyToUrl = $target->getUrl();
336         $act->title = ActivityUtils::verbToTitle($act->verb);
337     }
338
339     static function saveActivityObject(ActivityObject $actobj, Notice $stored)
340     {
341         $object = self::parseActivityObject($actobj, $stored);
342         $object->insert();  // exception throwing!
343         Event::handle('EndFavorNotice', array($stored->getProfile(), $object->getTarget()));
344         return $object;
345     }
346
347     public function getAttentionArray() {
348         // not all objects can/should carry attentions, so we don't require extending this
349         // the format should be an array with URIs to mentioned profiles
350         return array();
351     }
352
353     public function getTarget()
354     {
355         // throws exception on failure
356         $target = new Notice();
357         $target->id = $this->notice_id;
358         if (!$target->find(true)) {
359             throw new NoResultException($target);
360         }
361
362         return $target;
363     }
364
365     public function getTargetObject()
366     {
367         return $this->getTarget()->asActivityObject();
368     }
369
370     protected $_stored = array();
371
372     public function getStored()
373     {
374         if (!isset($this->_stored[$this->uri])) {
375             $stored = new Notice();
376             $stored->uri = $this->uri;
377             if (!$stored->find(true)) {
378                 throw new NoResultException($stored);
379             }
380             $this->_stored[$this->uri] = $stored;
381         }
382         return $this->_stored[$this->uri];
383     }
384
385     public function getActor()
386     {
387         $profile = new Profile();
388         $profile->id = $this->user_id;
389         if (!$profile->find(true)) {
390             throw new NoResultException($profile);
391         }
392         return $profile;
393     }
394
395     public function getActorObject()
396     {
397         return $this->getActor()->asActivityObject();
398     }
399
400     public function getUri()
401     {
402         if (!empty($this->uri)) {
403             return $this->uri;
404         }
405
406         // We (should've in this case) created it ourselves, so we tag it ourselves
407         return self::newUri($this->getActor(), $this->getTarget(), $this->created);
408     }
409
410     static function newUri(Profile $actor, Managed_DataObject $target, $created=null)
411     {
412         if (is_null($created)) {
413             $created = common_sql_now();
414         }
415         return TagURI::mint(strtolower(get_called_class()).':%d:%s:%d:%s',
416                                         $actor->id,
417                                         ActivityUtils::resolveUri(self::getObjectType(), true),
418                                         $target->id,
419                                         common_date_iso8601($created));
420     }
421 }