diff options
Diffstat (limited to 'node_modules/async/whilst.js')
-rw-r--r-- | node_modules/async/whilst.js | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/node_modules/async/whilst.js b/node_modules/async/whilst.js new file mode 100644 index 0000000..32a4776 --- /dev/null +++ b/node_modules/async/whilst.js @@ -0,0 +1,78 @@ +'use strict'; + +Object.defineProperty(exports, "__esModule", { + value: true +}); + +var _onlyOnce = require('./internal/onlyOnce.js'); + +var _onlyOnce2 = _interopRequireDefault(_onlyOnce); + +var _wrapAsync = require('./internal/wrapAsync.js'); + +var _wrapAsync2 = _interopRequireDefault(_wrapAsync); + +var _awaitify = require('./internal/awaitify.js'); + +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'];
\ No newline at end of file |