/**
* Shortcut for rendering a JSON response
* @param array $data: the PHP array that will be put into the JSON data index
* @param string $errorMsg: If you want to return an error message, pass one
* @param string $file: the file where the error message happened
* @return a JSONResponse
*/
protected function renderJSON($data = array(), $errorMsg = null, $file = '')
{
$response = new JSONResponse($this->appName);
$response->setParams($data);
if ($errorMsg !== null) {
$response->setErrorMessage($errorMsg, $file);
}
return $response;
}
