array( 'notice_id' => array('type' => 'int', 'not null' => true, 'description' => 'notice that is the favorite'), 'user_id' => array('type' => 'int', 'not null' => true, 'description' => 'user who likes this notice'), 'uri' => array('type' => 'varchar', 'length' => 255, 'description' => 'universally unique identifier, usually a tag URI'), 'created' => array('type' => 'datetime', 'not null' => true, 'description' => 'date this record was created'), 'modified' => array('type' => 'timestamp', 'not null' => true, 'description' => 'date this record was modified'), ), 'primary key' => array('notice_id', 'user_id'), 'unique keys' => array( 'fave_uri_key' => array('uri'), ), 'foreign keys' => array( 'fave_notice_id_fkey' => array('notice', array('notice_id' => 'id')), 'fave_user_id_fkey' => array('profile', array('user_id' => 'id')), // note: formerly referenced notice.id, but we can now record remote users' favorites ), 'indexes' => array( 'fave_notice_id_idx' => array('notice_id'), 'fave_user_id_idx' => array('user_id', 'modified'), 'fave_modified_idx' => array('modified'), ), ); } /** * Save a favorite record. * @fixme post-author notification should be moved here * * @param Profile $profile the local or remote user who likes * @param Notice $notice the notice that is liked * @return Fave record on success * @throws Exception on failure */ static function addNew(Profile $profile, Notice $notice) { $fave = null; if (Event::handle('StartFavorNotice', array($profile, $notice, &$fave))) { $fave = new Fave(); $fave->user_id = $profile->id; $fave->notice_id = $notice->id; $fave->created = common_sql_now(); $fave->modified = common_sql_now(); $fave->uri = self::newUri($profile, $notice, $fave->created); try { $fave->insert(); } catch (ServerException $e) { common_log_db_error($fave, 'INSERT', __FILE__); throw $e; } self::blowCacheForProfileId($fave->user_id); self::blowCacheForNoticeId($fave->notice_id); self::blow('popular'); Event::handle('EndFavorNotice', array($profile, $notice)); } return $fave; } // exception throwing takeover! public function insert() { if (!parent::insert()) { throw new ServerException(sprintf(_m('Could not store new object of type %s'), get_called_class())); } self::blowCacheForProfileId($this->user_id); self::blowCacheForNoticeId($this->notice_id); return $this; } public function delete($useWhere=false) { $profile = Profile::getKV('id', $this->user_id); $notice = Notice::getKV('id', $this->notice_id); $result = null; if (Event::handle('StartDisfavorNotice', array($profile, $notice, &$result))) { $result = parent::delete($useWhere); self::blowCacheForProfileId($this->user_id); self::blowCacheForNoticeId($this->notice_id); self::blow('popular'); if ($result) { Event::handle('EndDisfavorNotice', array($profile, $notice)); } } return $result; } function stream($user_id, $offset=0, $limit=NOTICES_PER_PAGE, $own=false, $since_id=0, $max_id=0) { $stream = new FaveNoticeStream($user_id, $own); return $stream->getNotices($offset, $limit, $since_id, $max_id); } function idStream($user_id, $offset=0, $limit=NOTICES_PER_PAGE, $own=false, $since_id=0, $max_id=0) { $stream = new FaveNoticeStream($user_id, $own); return $stream->getNoticeIds($offset, $limit, $since_id, $max_id); } function asActivity() { $target = $this->getTarget(); $actor = $this->getActor(); $act = new Activity(); $act->verb = ActivityVerb::FAVORITE; // FIXME: rationalize this with URL below $act->id = $this->getUri(); $act->time = strtotime($this->created); // TRANS: Activity title when marking a notice as favorite. $act->title = _("Favor"); $act->content = $target->rendered ?: $target->content; $act->actor = $actor->asActivityObject(); $act->target = $target->asActivityObject(); $act->objects = array(clone($act->target)); $url = common_local_url('AtomPubShowFavorite', array('profile' => $actor->id, 'notice' => $target->id)); $act->selfLink = $url; $act->editLink = $url; return $act; } static function existsForProfile(Notice $notice, Profile $scoped) { $fave = self::pkeyGet(array('user_id'=>$scoped->id, 'notice_id'=>$notice->id)); return ($fave instanceof Fave); } /** * Fetch a stream of favorites by profile * * @param integer $profileId Profile that faved * @param integer $offset Offset from last * @param integer $limit Number to get * * @return mixed stream of faves, use fetch() to iterate * * @todo Cache results * @todo integrate with Fave::stream() */ static function byProfile($profileId, $offset, $limit) { $fav = new Fave(); $fav->user_id = $profileId; $fav->orderBy('modified DESC'); $fav->limit($offset, $limit); $fav->find(); return $fav; } static function countByProfile(Profile $profile) { $c = Cache::instance(); if (!empty($c)) { $cnt = $c->get(Cache::key('fave:count_by_profile:'.$profile->id)); if (is_integer($cnt)) { return $cnt; } } $faves = new Fave(); $faves->user_id = $profile->id; $cnt = (int) $faves->count('notice_id'); if (!empty($c)) { $c->set(Cache::key('fave:count_by_profile:'.$profile->id), $cnt); } return $cnt; } static protected $_faves = array(); /** * All faves of this notice * * @param Notice $notice A notice we wish to get faves for (may still be ArrayWrapper) * * @return array Array of Fave objects */ static public function byNotice($notice) { if (!isset(self::$_faves[$notice->id])) { self::fillFaves(array($notice->id)); } return self::$_faves[$notice->id]; } static public function fillFaves(array $notice_ids) { $faveMap = Fave::listGet('notice_id', $notice_ids); self::$_faves = array_replace(self::$_faves, $faveMap); } static public function blowCacheForProfileId($profile_id) { $cache = Cache::instance(); if ($cache) { // Faves don't happen chronologically, so we need to blow // ;last cache, too $cache->delete(Cache::key('fave:ids_by_user:'.$profile_id)); $cache->delete(Cache::key('fave:ids_by_user:'.$profile_id.';last')); $cache->delete(Cache::key('fave:ids_by_user_own:'.$profile_id)); $cache->delete(Cache::key('fave:ids_by_user_own:'.$profile_id.';last')); $cache->delete(Cache::key('fave:count_by_profile:'.$profile_id)); } } static public function blowCacheForNoticeId($notice_id) { $cache = Cache::instance(); if ($cache) { $cache->delete(Cache::key('fave:list-ids:notice_id:'.$notice_id)); } } // Remember that we want the _activity_ notice here, not faves applied // to the supplied Notice (as with byNotice)! static public function fromStored(Notice $stored) { $class = get_called_class(); $object = new $class; $object->uri = $stored->uri; if (!$object->find(true)) { throw new NoResultException($object); } return $object; } /** * Retrieves the _targeted_ notice of a verb (such as the notice that was * _favorited_, but not the favorite activity itself). * * @param Notice $stored The activity notice. * * @throws NoResultException when it can't find what it's looking for. */ static public function getTargetFromStored(Notice $stored) { return self::fromStored($stored)->getTarget(); } static public function getObjectType() { return 'activity'; } public function asActivityObject(Profile $scoped=null) { $actobj = new ActivityObject(); $actobj->id = $this->getUri(); $actobj->type = ActivityUtils::resolveUri(self::getObjectType()); $actobj->actor = $this->getActorObject(); $actobj->target = $this->getTargetObject(); $actobj->objects = array(clone($actobj->target)); $actobj->verb = ActivityVerb::FAVORITE; $actobj->title = ActivityUtils::verbToTitle($actobj->verb); $actobj->content = $this->getTarget()->rendered ?: $this->getTarget()->content; return $actobj; } /** * @param ActivityObject $actobj The _favored_ notice (which we're "in-reply-to") * @param Notice $stored The _activity_ notice, i.e. the favor itself. */ static public function parseActivityObject(ActivityObject $actobj, Notice $stored) { $local = ActivityUtils::findLocalObject($actobj->getIdentifiers()); if (!$local instanceof Notice) { // $local always returns something, but this was not what we expected. Something is wrong. throw new Exception('Something other than a Notice was returned from findLocalObject'); } $actor = $stored->getProfile(); $object = new Fave(); $object->user_id = $stored->getProfile()->id; $object->notice_id = $local->id; $object->uri = $stored->uri; $object->created = $stored->created; $object->modified = $stored->modified; return $object; } static public function extendActivity(Notice $stored, Activity $act, Profile $scoped=null) { $target = self::getTargetFromStored($stored); // The following logic was copied from StatusNet's Activity plugin if (ActivityUtils::compareTypes($target->verb, array(ActivityVerb::POST))) { // "I like the thing you posted" $act->objects = $target->asActivity()->objects; } else { // "I like that you did whatever you did" $act->target = $target->asActivityObject(); $act->objects = array(clone($act->target)); } $act->context->replyToID = $target->getUri(); $act->context->replyToUrl = $target->getUrl(); $act->title = ActivityUtils::verbToTitle($act->verb); } static function saveActivityObject(ActivityObject $actobj, Notice $stored) { $object = self::parseActivityObject($actobj, $stored); $object->insert(); // exception throwing! Event::handle('EndFavorNotice', array($stored->getProfile(), $object->getTarget())); return $object; } public function getAttentionArray() { // not all objects can/should carry attentions, so we don't require extending this // the format should be an array with URIs to mentioned profiles return array(); } public function getTarget() { // throws exception on failure $target = new Notice(); $target->id = $this->notice_id; if (!$target->find(true)) { throw new NoResultException($target); } return $target; } public function getTargetObject() { return $this->getTarget()->asActivityObject(); } protected $_stored = array(); public function getStored() { if (!isset($this->_stored[$this->uri])) { $stored = new Notice(); $stored->uri = $this->uri; if (!$stored->find(true)) { throw new NoResultException($stored); } $this->_stored[$this->uri] = $stored; } return $this->_stored[$this->uri]; } public function getActor() { $profile = new Profile(); $profile->id = $this->user_id; if (!$profile->find(true)) { throw new NoResultException($profile); } return $profile; } public function getActorObject() { return $this->getActor()->asActivityObject(); } public function getUri() { if (!empty($this->uri)) { return $this->uri; } // We (should've in this case) created it ourselves, so we tag it ourselves return self::newUri($this->getActor(), $this->getTarget(), $this->created); } static function newUri(Profile $actor, Managed_DataObject $target, $created=null) { if (is_null($created)) { $created = common_sql_now(); } return TagURI::mint(strtolower(get_called_class()).':%d:%s:%d:%s', $actor->id, ActivityUtils::resolveUri(self::getObjectType(), true), $target->id, common_date_iso8601($created)); } }