/**
* Parse data by walking through keys
*
* @param $data
* @param $keys
*
* @return array|mixed|null|string
*/
private function parseValueData($data, $keys)
{
$mainKey = $keys[0];
if (isset($mainKey) && !empty($data)) {
if (Validate::json($data)) {
$data = json_decode($data, true);
}
// unset first key since $data is already set to it
unset($keys[0]);
if (!empty($keys) && is_array($keys)) {
foreach ($keys as $name) {
$data = isset($data[$name]) && $data[$name] !== '' ? $data[$name] : null;
}
}
}
return $data;
}
/**
* Set Sub Group into bracket syntax
*
* @param $sub
*
* @return $this
*/
public function setSub($sub)
{
$this->sub = null;
if (Validate::bracket($sub)) {
$this->sub = $sub;
} elseif (is_string($sub)) {
$this->sub = "[{$sub}]";
}
return $this;
}