1 | ;
|
2 |
|
3 | Object.defineProperty(exports, "__esModule", {
|
4 | value: true
|
5 | });
|
6 |
|
7 | var _onlyOnce = require('./internal/onlyOnce.js');
|
8 |
|
9 | var _onlyOnce2 = _interopRequireDefault(_onlyOnce);
|
10 |
|
11 | var _wrapAsync = require('./internal/wrapAsync.js');
|
12 |
|
13 | var _wrapAsync2 = _interopRequireDefault(_wrapAsync);
|
14 |
|
15 | var _awaitify = require('./internal/awaitify.js');
|
16 |
|
17 | var _awaitify2 = _interopRequireDefault(_awaitify);
|
18 |
|
19 | function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
|
20 |
|
21 | /**
|
22 | * Repeatedly call `iteratee`, while `test` returns `true`. Calls `callback` when
|
23 | * stopped, or an error occurs.
|
24 | *
|
25 | * @name whilst
|
26 | * @static
|
27 | * @memberOf module:ControlFlow
|
28 | * @method
|
29 | * @category Control Flow
|
30 | * @param {AsyncFunction} test - asynchronous truth test to perform before each
|
31 | * execution of `iteratee`. Invoked with (callback).
|
32 | * @param {AsyncFunction} iteratee - An async function which is called each time
|
33 | * `test` passes. Invoked with (callback).
|
34 | * @param {Function} [callback] - A callback which is called after the test
|
35 | * function has failed and repeated execution of `iteratee` has stopped. `callback`
|
36 | * will be passed an error and any arguments passed to the final `iteratee`'s
|
37 | * callback. Invoked with (err, [results]);
|
38 | * @returns {Promise} a promise, if no callback is passed
|
39 | * @example
|
40 | *
|
41 | * var count = 0;
|
42 | * async.whilst(
|
43 | * function test(cb) { cb(null, count < 5); },
|
44 | * function iter(callback) {
|
45 | * count++;
|
46 | * setTimeout(function() {
|
47 | * callback(null, count);
|
48 | * }, 1000);
|
49 | * },
|
50 | * function (err, n) {
|
51 | * // 5 seconds have passed, n = 5
|
52 | * }
|
53 | * );
|
54 | */
|
55 | function whilst(test, iteratee, callback) {
|
56 | callback = (0, _onlyOnce2.default)(callback);
|
57 | var _fn = (0, _wrapAsync2.default)(iteratee);
|
58 | var _test = (0, _wrapAsync2.default)(test);
|
59 | var results = [];
|
60 |
|
61 | function next(err, ...rest) {
|
62 | if (err) return callback(err);
|
63 | results = rest;
|
64 | if (err === false) return;
|
65 | _test(check);
|
66 | }
|
67 |
|
68 | function check(err, truth) {
|
69 | if (err) return callback(err);
|
70 | if (err === false) return;
|
71 | if (!truth) return callback(null, ...results);
|
72 | _fn(next);
|
73 | }
|
74 |
|
75 | return _test(check);
|
76 | }
|
77 | exports.default = (0, _awaitify2.default)(whilst, 3);
|
78 | module.exports = exports.default; |
\ | No newline at end of file |