Function withCallback

lib/withCallback.js:17–29

* withCallback handles an optional nodeback * and return the promise object * * @param promise {Promise} * @param cb {Function} * @return Promise * * @example * function eitherOr(options, callback) { * return withCallback(promiseThingy(options), callback); * }

(promise, cb)

 */

function withCallback(promise, cb) {
  if (typeof cb !== 'function') {
    cb = noop;
  }

  promise.then((result) => {
    cb(null, result);
  }).catch((err) => {
    cb(err);
  });

  return promise;
}

function noop() {}