| 'use strict'; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| exports.default = reflect; |
| |
| var _initialParams = require('./internal/initialParams'); |
| |
| var _initialParams2 = _interopRequireDefault(_initialParams); |
| |
| var _rest = require('./internal/rest'); |
| |
| var _rest2 = _interopRequireDefault(_rest); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| /** |
| * Wraps the function in another function that always returns data even when it |
| * errors. |
| * |
| * The object returned has either the property `error` or `value`. |
| * |
| * @name reflect |
| * @static |
| * @memberOf module:Utils |
| * @method |
| * @category Util |
| * @param {Function} fn - The function you want to wrap |
| * @returns {Function} - A function that always passes null to it's callback as |
| * the error. The second argument to the callback will be an `object` with |
| * either an `error` or a `value` property. |
| * @example |
| * |
| * async.parallel([ |
| * async.reflect(function(callback) { |
| * // do some stuff ... |
| * callback(null, 'one'); |
| * }), |
| * async.reflect(function(callback) { |
| * // do some more stuff but error ... |
| * callback('bad stuff happened'); |
| * }), |
| * async.reflect(function(callback) { |
| * // do some more stuff ... |
| * callback(null, 'two'); |
| * }) |
| * ], |
| * // optional callback |
| * function(err, results) { |
| * // values |
| * // results[0].value = 'one' |
| * // results[1].error = 'bad stuff happened' |
| * // results[2].value = 'two' |
| * }); |
| */ |
| function reflect(fn) { |
| return (0, _initialParams2.default)(function reflectOn(args, reflectCallback) { |
| args.push((0, _rest2.default)(function callback(err, cbArgs) { |
| if (err) { |
| reflectCallback(null, { |
| error: err |
| }); |
| } else { |
| var value = null; |
| if (cbArgs.length === 1) { |
| value = cbArgs[0]; |
| } else if (cbArgs.length > 1) { |
| value = cbArgs; |
| } |
| reflectCallback(null, { |
| value: value |
| }); |
| } |
| })); |
| |
| return fn.apply(this, args); |
| }); |
| } |
| module.exports = exports['default']; |