public static function encode_mime_fileurl($y_msg_file, $y_ctrl_key)
 {
     //--
     $y_msg_file = (string) trim((string) $y_msg_file);
     if ((string) $y_msg_file == '') {
         Smart::log_warning('Mail-Utils / Encode Mime File URL: Empty Message File Path has been provided. This means the URL link will be unavaliable (empty) to assure security protection.');
         return '';
     }
     //end if
     if (!SmartFileSysUtils::check_file_or_dir_name($y_msg_file)) {
         Smart::log_warning('Mail-Utils / Encode Mime File URL: Invalid Message File Path has been provided. This means the URL link will be unavaliable (empty) to assure security protection. Message File: ' . $y_msg_file);
         return '';
     }
     //end if
     //--
     $y_ctrl_key = (string) trim((string) $y_ctrl_key);
     if ((string) $y_ctrl_key == '') {
         Smart::log_warning('Mail-Utils / Encode Mime File URL: Empty Controller Key has been provided. This means the URL link will be unavaliable (empty) to assure security protection.');
         return '';
     }
     //end if
     if (SMART_FRAMEWORK_ADMIN_AREA === true) {
         // {{{SYNC-ENCMIMEURL-CTRL-PREFIX}}}
         $y_ctrl_key = (string) 'AdminMailUtilArea/' . $y_ctrl_key;
     } else {
         $y_ctrl_key = (string) 'IndexMailUtilArea/' . $y_ctrl_key;
     }
     //end if
     //--
     $crrtime = (int) time();
     $access_key = sha1('MimeLink:' . SMART_SOFTWARE_NAMESPACE . '-' . SMART_FRAMEWORK_SECURITY_KEY . '-' . SMART_APP_VISITOR_COOKIE . ':' . $y_msg_file . '>' . $y_ctrl_key);
     $unique_key = sha1('Time=' . $crrtime . '#' . SMART_SOFTWARE_NAMESPACE . '-' . SMART_FRAMEWORK_SECURITY_KEY . '-' . $access_key . '-' . SmartUtils::unique_auth_client_private_key() . ':' . $y_msg_file . '>' . $y_ctrl_key);
     $self_robot_key = sha1('Time=' . $crrtime . '#' . SmartAuth::get_login_id() . '*' . SMART_SOFTWARE_NAMESPACE . '-' . SMART_FRAMEWORK_SECURITY_KEY . '-' . SmartUtils::get_selfrobot_useragent_name() . '$' . $access_key . ':' . $y_msg_file . '>' . $y_ctrl_key);
     //-- {{{SYNC-MIME-ENCRYPT-ARR}}}
     $safe_link = SmartUtils::crypto_encrypt(trim((string) $crrtime) . "\n" . trim((string) $y_msg_file) . "\n" . trim((string) $access_key) . "\n" . trim((string) $unique_key) . "\n" . trim((string) $self_robot_key) . "\n", 'SmartFramework//MimeLink' . SMART_FRAMEWORK_SECURITY_KEY);
     //--
     return (string) $safe_link;
     //--
 }