| 'use strict'; |
| |
| Object.defineProperty(exports, "__esModule", { |
| value: true |
| }); |
| |
| var _onlyOnce = require('./internal/onlyOnce'); |
| |
| var _onlyOnce2 = _interopRequireDefault(_onlyOnce); |
| |
| var _wrapAsync = require('./internal/wrapAsync'); |
| |
| var _wrapAsync2 = _interopRequireDefault(_wrapAsync); |
| |
| var _awaitify = require('./internal/awaitify'); |
| |
| var _awaitify2 = _interopRequireDefault(_awaitify); |
| |
| function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } |
| |
| /** |
| * Repeatedly call `iteratee`, while `test` returns `true`. Calls `callback` when |
| * stopped, or an error occurs. |
| * |
| * @name whilst |
| * @static |
| * @memberOf module:ControlFlow |
| * @method |
| * @category Control Flow |
| * @param {AsyncFunction} test - asynchronous truth test to perform before each |
| * execution of `iteratee`. Invoked with (). |
| * @param {AsyncFunction} iteratee - An async function which is called each time |
| * `test` passes. Invoked with (callback). |
| * @param {Function} [callback] - A callback which is called after the test |
| * function has failed and repeated execution of `iteratee` has stopped. `callback` |
| * will be passed an error and any arguments passed to the final `iteratee`'s |
| * callback. Invoked with (err, [results]); |
| * @returns {Promise} a promise, if no callback is passed |
| * @example |
| * |
| * var count = 0; |
| * async.whilst( |
| * function test(cb) { cb(null, count < 5;) }, |
| * function iter(callback) { |
| * count++; |
| * setTimeout(function() { |
| * callback(null, count); |
| * }, 1000); |
| * }, |
| * function (err, n) { |
| * // 5 seconds have passed, n = 5 |
| * } |
| * ); |
| */ |
| function whilst(test, iteratee, callback) { |
| callback = (0, _onlyOnce2.default)(callback); |
| var _fn = (0, _wrapAsync2.default)(iteratee); |
| var _test = (0, _wrapAsync2.default)(test); |
| var results = []; |
| |
| function next(err, ...rest) { |
| if (err) return callback(err); |
| results = rest; |
| if (err === false) return; |
| _test(check); |
| } |
| |
| function check(err, truth) { |
| if (err) return callback(err); |
| if (err === false) return; |
| if (!truth) return callback(null, ...results); |
| _fn(next); |
| } |
| |
| return _test(check); |
| } |
| exports.default = (0, _awaitify2.default)(whilst, 3); |
| module.exports = exports['default']; |