/**
* Creates a table {prefix}{$namespace}_lock that is used as a mutex.
*
* @param string $namespace Allows having separate locks for separate processes
* @return bool
*/
public function lock($namespace)
{
$this->assertNamespace($namespace);
if (!$this->isLocked($namespace)) {
// Lock it
$this->db->insertData("CREATE TABLE {$this->db->getTablePrefix()}{$namespace}_lock (id INT)");
$this->logger->info("Locked mutex for {$namespace}");
return true;
}
$this->logger->warn("Cannot lock mutex for {$namespace}: already locked.");
return false;
}
/**
* Get a user by GUID even if the entity is hidden or disabled
*
* @param int $guid User GUID. Default is logged in user
*
* @return ElggUser|false
* @throws UserFetchFailureException
* @access private
*/
public function getUserForPermissionsCheck($guid = 0)
{
if (!$guid) {
return $this->session->getLoggedInUser();
}
// need to ignore access and show hidden entities for potential hidden/disabled users
$ia = $this->session->setIgnoreAccess(true);
$show_hidden = access_show_hidden_entities(true);
$user = $this->get($guid, 'user');
$this->session->setIgnoreAccess($ia);
access_show_hidden_entities($show_hidden);
if (!$user) {
// requested to check access for a specific user_guid, but there is no user entity, so the caller
// should cancel the check and return false
$message = $this->translator->translate('UserFetchFailureException', array($guid));
$this->logger->warn($message);
throw new UserFetchFailureException();
}
return $user;
}
