80 lines
2.2 KiB
JavaScript
80 lines
2.2 KiB
JavaScript
'use strict';
|
|
|
|
Object.defineProperty(exports, "__esModule", {
|
|
value: true
|
|
});
|
|
exports.default = reflect;
|
|
|
|
var _initialParams = require('./internal/initialParams');
|
|
|
|
var _initialParams2 = _interopRequireDefault(_initialParams);
|
|
|
|
var _baseRest = require('lodash/_baseRest');
|
|
|
|
var _baseRest2 = _interopRequireDefault(_baseRest);
|
|
|
|
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, _baseRest2.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']; |