| 'use strict'; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| exports.default = doDuring; |
| |
| var _noop = require('lodash/noop'); |
| |
| var _noop2 = _interopRequireDefault(_noop); |
| |
| var _rest = require('./internal/rest'); |
| |
| var _rest2 = _interopRequireDefault(_rest); |
| |
| var _onlyOnce = require('./internal/onlyOnce'); |
| |
| var _onlyOnce2 = _interopRequireDefault(_onlyOnce); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| /** |
| * The post-check version of [`during`]{@link module:ControlFlow.during}. To reflect the difference in |
| * the order of operations, the arguments `test` and `fn` are switched. |
| * |
| * Also a version of [`doWhilst`]{@link module:ControlFlow.doWhilst} with asynchronous `test` function. |
| * @name doDuring |
| * @static |
| * @memberOf module:ControlFlow |
| * @method |
| * @see [async.during]{@link module:ControlFlow.during} |
| * @category Control Flow |
| * @param {Function} fn - A function which is called each time `test` passes. |
| * The function is passed a `callback(err)`, which must be called once it has |
| * completed with an optional `err` argument. Invoked with (callback). |
| * @param {Function} test - asynchronous truth test to perform before each |
| * execution of `fn`. Invoked with (...args, callback), where `...args` are the |
| * non-error args from the previous callback of `fn`. |
| * @param {Function} [callback] - A callback which is called after the test |
| * function has failed and repeated execution of `fn` has stopped. `callback` |
| * will be passed an error if one occured, otherwise `null`. |
| */ |
| function doDuring(fn, test, callback) { |
| callback = (0, _onlyOnce2.default)(callback || _noop2.default); |
| |
| var next = (0, _rest2.default)(function (err, args) { |
| if (err) return callback(err); |
| args.push(check); |
| test.apply(this, args); |
| }); |
| |
| function check(err, truth) { |
| if (err) return callback(err); |
| if (!truth) return callback(null); |
| fn(next); |
| } |
| |
| check(null, true); |
| } |
| module.exports = exports['default']; |