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Diffstat (limited to 'node_modules/async/reflect.js')
-rw-r--r-- | node_modules/async/reflect.js | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/node_modules/async/reflect.js b/node_modules/async/reflect.js new file mode 100644 index 0000000..297ed79 --- /dev/null +++ b/node_modules/async/reflect.js @@ -0,0 +1,78 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = reflect; + +var _initialParams = require('./internal/initialParams.js'); + +var _initialParams2 = _interopRequireDefault(_initialParams); + +var _wrapAsync = require('./internal/wrapAsync.js'); + +var _wrapAsync2 = _interopRequireDefault(_wrapAsync); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +/** + * Wraps the async function in another function that always completes with a + * result object, even when it errors. + * + * The result object has either the property `error` or `value`. + * + * @name reflect + * @static + * @memberOf module:Utils + * @method + * @category Util + * @param {AsyncFunction} fn - The async 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) { + var _fn = (0, _wrapAsync2.default)(fn); + return (0, _initialParams2.default)(function reflectOn(args, reflectCallback) { + args.push((error, ...cbArgs) => { + let retVal = {}; + if (error) { + retVal.error = error; + } + if (cbArgs.length > 0) { + var value = cbArgs; + if (cbArgs.length <= 1) { + [value] = cbArgs; + } + retVal.value = value; + } + reflectCallback(null, retVal); + }); + + return _fn.apply(this, args); + }); +} +module.exports = exports['default'];
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