private static function deleteDirectory($id, $path, $root = false)
 {
     $subfolders = DB::select('SELECT folder_id FROM folders WHERE in_folder = "' . $id . '"');
     if ($root) {
         File::deleteDirectory(public_path() . '/users_files/' . $path . '/' . $id);
     }
     foreach ($subfolders as $folder) {
         File::deleteDirectory(public_path() . '/users_files/' . $path . '/' . $folder->folder_id);
         DB::table('files')->where('folder_id', '=', $folder->folder_id)->delete();
         Folder::deleteDirectory($folder->folder_id, $path);
     }
 }