public function clear($log)
{
if ($log === 'change') {
$this->changeRepository->clearLog();
} elseif ($log === 'system') {
$this->systemRepository->clearLog();
} else {
throw new \UnexpectedValueException("Invalid log type requested: {$log}");
}
$this->app['logger.system']->info(ucfirst($log) . ' log cleared.', ['event' => 'security']);
}