Punic\Territory::filterStructure PHP Метод

    protected static function filterStructure($parent, $levels)
    {
        $thisResult = array();
        if (in_array($parent['level'], $levels, true)) {
            $thisResult[0] = $parent;
            $thisResult[0]['children'] = array();
            $addToSub = true;
        } else {
            $addToSub = false;
        }
        $subList = array();
        foreach ($parent['children'] as $child) {
            $subList = array_merge($subList, static::filterStructure($child, $levels));
        }
        if ($addToSub) {
            $thisResult[0]['children'] = $subList;
        } else {
            $thisResult = $subList;
        }
        return $thisResult;
    }