gnu-social/plugins/Favorite/classes/Fave.php
2016-01-16 21:12:53 +01:00

456 lines
16 KiB
PHP

<?php
/**
* Table Definition for fave
*/
class Fave extends Managed_DataObject
{
public $__table = 'fave'; // table name
public $notice_id; // int(4) primary_key not_null
public $user_id; // int(4) primary_key not_null
public $uri; // varchar(191) not 255 because utf8mb4 takes more space not 255 because utf8mb4 takes more space
public $created; // datetime multiple_key not_null
public $modified; // timestamp() not_null default_CURRENT_TIMESTAMP
public static function schemaDef()
{
return array(
'fields' => 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' => 191, '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 $actor the local or remote Profile who favorites
* @param Notice $target the notice that is favorited
* @return Fave record on success
* @throws Exception on failure
*/
static function addNew(Profile $actor, Notice $target) {
if (self::existsForProfile($target, $actor)) {
// TRANS: Client error displayed when trying to mark a notice as favorite that already is a favorite.
throw new AlreadyFulfilledException(_('You have already favorited this!'));
}
$act = new Activity();
$act->type = ActivityObject::ACTIVITY;
$act->verb = ActivityVerb::FAVORITE;
$act->time = time();
$act->id = self::newUri($actor, $target, common_sql_date($act->time));
$act->title = _("Favor");
// TRANS: Message that is the "content" of a favorite (%1$s is the actor's nickname, %2$ is the favorited
// notice's nickname and %3$s is the content of the favorited notice.)
$act->content = sprintf(_('%1$s favorited something by %2$s: %3$s'),
$actor->getNickname(), $target->getProfile()->getNickname(),
$target->getRendered());
$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;
// saveActivity will in turn also call Fave::saveActivityObject which does
// what this function used to do before this commit.
$stored = Notice::saveActivity($act, $actor);
return $stored;
}
public function removeEntry(Profile $actor, Notice $target)
{
$fave = new Fave();
$fave->user_id = $actor->getID();
$fave->notice_id = $target->getID();
if (!$fave->find(true)) {
// TRANS: Client error displayed when trying to remove a 'favor' when there is none in the first place.
throw new AlreadyFulfilledException(_('This is already not favorited.'));
}
$result = $fave->delete();
if ($result === false) {
common_log_db_error($fave, 'DELETE', __FILE__);
// TRANS: Server error displayed when removing a favorite from the database fails.
throw new ServerException(_('Could not delete favorite.'));
}
Fave::blowCacheForProfileId($actor->getID());
Fave::blowCacheForNoticeId($target->getID());
}
// exception throwing takeover!
public function insert()
{
if (parent::insert()===false) {
common_log_db_error($this, 'INSERT', __FILE__);
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)
{
$result = null;
try {
$profile = $this->getActor();
$notice = $this->getTarget();
if (Event::handle('StartDisfavorNotice', array($profile, $notice, &$result))) {
$result = parent::delete($useWhere);
if ($result !== false) {
Event::handle('EndDisfavorNotice', array($profile, $notice));
}
}
} catch (NoResultException $e) {
// In case there's some inconsistency where the profile or notice was deleted without losing the fave db entry
common_log(LOG_INFO, '"'.get_class($e->obj).'" with id=='.var_export($e->obj->id, true).' object not found when deleting favorite, ignoring...');
} catch (EmptyIdException $e) {
// Some buggy instances of GNU social have had favorites with notice id==0 stored in the database
common_log(LOG_INFO, _ve($e->getMessage()));
}
// If we catch an exception above, then $result===null because parent::delete only returns an int>=0 or boolean false
if (is_null($result)) {
// Delete it without the event, as something is wrong and we don't want it anyway.
$result = parent::delete($useWhere);
}
// Err, apparently we can reference $this->user_id after parent::delete,
// I guess it's safe because this is the order it was before!
self::blowCacheForProfileId($this->user_id);
self::blowCacheForNoticeId($this->notice_id);
self::blow('popular');
return $result;
}
static function stream($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.
$act->title = _("Favor");
// TRANS: Message that is the "content" of a favorite (%1$s is the actor's nickname, %2$ is the favorited
// notice's nickname and %3$s is the content of the favorited notice.)
$act->content = sprintf(_('%1$s favorited something by %2$s: %3$s'),
$actor->getNickname(), $target->getProfile()->getNickname(),
$target->getRendered());
$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, 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()->getRendered();
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)
{
// throws exception if nothing was found, but it could also be a non-Notice...
// FIXME: This should only test _one_ URI (and not the links etc.) though a function like this could be useful in other cases
$local = ActivityUtils::findLocalObject($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::compareVerbs($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);
$object->insert(); // exception throwing in Fave's case!
self::blowCacheForProfileId($object->user_id);
self::blowCacheForNoticeId($object->notice_id);
self::blow('popular');
Event::handle('EndFavorNotice', array($stored->getProfile(), $object->getTarget()));
return $object;
}
public function getAttentionArray() {
// not all objects can/should carry attentions, so we don't require extending this
// the format should be an array with URIs to mentioned profiles
return array();
}
public function getTarget()
{
return Notice::getByID($this->notice_id);
}
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()
{
return Profile::getByID($this->user_id);
}
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);
}
}