/**
* Group fields by specified pattern
* Creates multi-dimensional tree in which each level corresponds to pattern parameter
* Leafs are form fields
*
* @param string $template Field name template
*
* @return array
* @throws \InvalidArgumentException
*/
public function groupFields($template)
{
$template = new Template($template);
$result = array();
foreach ($this->fields as $name => $field) {
$match = array();
if (preg_match($template->getRegExp(), $name, $match)) {
unset($match[0]);
$match[] = $field;
$fields = Arr::nest($match);
$result = array_replace_recursive($result, $fields);
}
}
return $result;
}
