root / HServer / 00.Server / 00.Program / node_modules / async / reflect.js
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| 1 | 39 | HKM | 'use strict';
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| 2 | |||
| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true |
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| 5 | }); |
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| 6 | exports.default = reflect;
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| 7 | |||
| 8 | var _initialParams = require('./internal/initialParams'); |
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| 9 | |||
| 10 | var _initialParams2 = _interopRequireDefault(_initialParams);
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| 11 | |||
| 12 | var _rest = require('./internal/rest'); |
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| 13 | |||
| 14 | var _rest2 = _interopRequireDefault(_rest);
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| 15 | |||
| 16 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
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| 17 | |||
| 18 | /**
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| 19 | * Wraps the function in another function that always returns data even when it
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| 20 | * errors.
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| 21 | *
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| 22 | * The object returned has either the property `error` or `value`.
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| 23 | *
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| 24 | * @name reflect
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| 25 | * @static
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| 26 | * @memberOf module:Utils
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| 27 | * @method
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| 28 | * @category Util
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| 29 | * @param {Function} fn - The function you want to wrap
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| 30 | * @returns {Function} - A function that always passes null to it's callback as
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| 31 | * the error. The second argument to the callback will be an `object` with
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| 32 | * either an `error` or a `value` property.
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| 33 | * @example
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| 34 | *
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| 35 | * async.parallel([
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| 36 | * async.reflect(function(callback) {
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| 37 | * // do some stuff ...
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| 38 | * callback(null, 'one');
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| 39 | * }),
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| 40 | * async.reflect(function(callback) {
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| 41 | * // do some more stuff but error ...
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| 42 | * callback('bad stuff happened');
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| 43 | * }),
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| 44 | * async.reflect(function(callback) {
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| 45 | * // do some more stuff ...
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| 46 | * callback(null, 'two');
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| 47 | * })
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| 48 | * ],
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| 49 | * // optional callback
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| 50 | * function(err, results) {
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| 51 | * // values
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| 52 | * // results[0].value = 'one'
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| 53 | * // results[1].error = 'bad stuff happened'
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| 54 | * // results[2].value = 'two'
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| 55 | * });
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| 56 | */
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| 57 | function reflect(fn) { |
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| 58 | return (0, _initialParams2.default)(function reflectOn(args, reflectCallback) { |
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| 59 | args.push((0, _rest2.default)(function callback(err, cbArgs) { |
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| 60 | if (err) {
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| 61 | reflectCallback(null, {
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| 62 | error: err
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| 63 | }); |
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| 64 | } else {
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| 65 | var value = null; |
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| 66 | if (cbArgs.length === 1) { |
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| 67 | value = cbArgs[0];
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| 68 | } else if (cbArgs.length > 1) { |
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| 69 | value = cbArgs; |
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| 70 | } |
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| 71 | reflectCallback(null, {
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| 72 | value: value
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| 73 | }); |
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| 74 | } |
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| 75 | })); |
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| 76 | |||
| 77 | return fn.apply(this, args); |
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| 78 | }); |
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| 79 | } |
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| 80 | module.exports = exports['default']; |