/**
* Validates permissions for given object.
*/
protected function validateObjectParameters()
{
if (!MODULE_LIKE) {
throw new PermissionDeniedException();
}
$this->readString('containerID', false, 'data');
$this->readInteger('objectID', false, 'data');
$this->readString('objectType', false, 'data');
$this->objectType = LikeHandler::getInstance()->getObjectType($this->parameters['data']['objectType']);
if ($this->objectType === null) {
throw new UserInputException('objectType');
}
$this->objectTypeProvider = $this->objectType->getProcessor();
$this->likeableObject = $this->objectTypeProvider->getObjectByID($this->parameters['data']['objectID']);
$this->likeableObject->setObjectType($this->objectType);
if (!$this->objectTypeProvider->checkPermissions($this->likeableObject)) {
throw new PermissionDeniedException();
}
}
/**
* @see \wcf\data\like\ILikeObjectTypeProvider::checkPermissions()
*/
public function checkPermissions(ILikeObject $news)
{
// make sure, the news is accessible
return $news->canRead();
}
/**
* @see \wcf\data\like\ILikeObjectTypeProvider::checkPermissions()
*/
public function checkPermissions(ILikeObject $object)
{
return $object->entryID && $object->canRead();
}
/**
* Reverts the like of an object.
*
* @param \wcf\data\like\Like $like
* @param \wcf\data\like\object\ILikeObject $likeable
* @param \wcf\data\like\object\LikeObject $likeObject
* @param \wcf\data\user\User $user
* @return array
*/
public function revertLike(Like $like, ILikeObject $likeable, LikeObject $likeObject, User $user)
{
try {
WCF::getDB()->beginTransaction();
// delete like
$editor = new LikeEditor($like);
$editor->delete();
// update like object cache
$likes = $likeObject->likes;
$dislikes = $likeObject->dislikes;
$cumulativeLikes = $likeObject->cumulativeLikes;
if ($like->likeValue == Like::LIKE) {
$likes--;
$cumulativeLikes--;
} else {
$dislikes--;
$cumulativeLikes++;
}
// build update data
$updateData = array('likes' => $likes, 'dislikes' => $dislikes, 'cumulativeLikes' => $cumulativeLikes);
$users = $likeObject->getUsers();
$usersArray = array();
foreach ($users as $user2) {
$usersArray[$user2->userID] = array('userID' => $user2->userID, 'username' => $user2->username);
}
if (isset($usersArray[$user->userID])) {
unset($usersArray[$user->userID]);
$updateData['cachedUsers'] = serialize($usersArray);
}
$likeObjectEditor = new LikeObjectEditor($likeObject);
if (!$updateData['likes'] && !$updateData['dislikes']) {
// remove object instead
$likeObjectEditor->delete();
} else {
// update data
$likeObjectEditor->update($updateData);
}
// update owner's like counter and activity points
if ($likeable->getUserID()) {
if ($like->likeValue == Like::LIKE) {
$userEditor = new UserEditor(new User($likeable->getUserID()));
$userEditor->updateCounters(array('likesReceived' => -1));
UserActivityPointHandler::getInstance()->removeEvents('com.woltlab.wcf.like.activityPointEvent.receivedLikes', array($likeable->getUserID() => 1));
}
}
// update object's like counter
$likeable->updateLikeCounter($cumulativeLikes);
WCF::getDB()->commitTransaction();
} catch (DatabaseException $e) {
WCF::getDB()->rollBackTransaction();
}
return array('data' => $this->loadLikeStatus($likeObject, $user), 'newValue' => null, 'oldValue' => $like->likeValue, 'users' => $usersArray);
}
