const crypto = global.yoho.crypto;
const _ = require('lodash');

const decode = _.memoize(function(r) {
  return crypto.decrypt(null, r);
});

module.exports = function(r) {
  try {
    let s = decode(r);

    s = s.replace(/[^\w\/\^\(\)\[\]+-\.\*:]/g, '');
    return s;
  } catch (e) {
    return r;
  }
};