public static function log($message, $file = '')
    {
        $file = empty($file) ? 'system.log' : $file;

        try {
                $logDir  = Mage::getBaseDir('var') . '/' . 'log';
                $logFile = $logDir . '/' . $file;

                if (!is_dir($logDir)) {
                    mkdir($logDir);
                    chmod($logDir, 0777);
                }

                if (!file_exists($logFile)) {
                    file_put_contents($logFile, '');
                    chmod($logFile, 0777);
                }

                $format = '%s : %s' . PHP_EOL;
                if (is_array($message) || is_object($message)) {
                      $message = print_r($message, true);
                }

                file_put_contents($logFile, sprintf($format, date("Y-m-d H:i:s"), $message), FILE_APPEND);
        }
        catch (Exception $e) {
        }
    }