78 lines
2.2 KiB
JavaScript
78 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 _wrapAsync = require('./internal/wrapAsync');
|
||
|
|
|
||
|
|
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'];
|