diff options
Diffstat (limited to 'node_modules/async/doWhilst.js')
-rw-r--r-- | node_modules/async/doWhilst.js | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/node_modules/async/doWhilst.js b/node_modules/async/doWhilst.js new file mode 100644 index 0000000..4c98e9e --- /dev/null +++ b/node_modules/async/doWhilst.js @@ -0,0 +1,68 @@ +'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 }; } + +/** + * The post-check version of [`whilst`]{@link module:ControlFlow.whilst}. To reflect the difference in + * the order of operations, the arguments `test` and `iteratee` are switched. + * + * `doWhilst` is to `whilst` as `do while` is to `while` in plain JavaScript. + * + * @name doWhilst + * @static + * @memberOf module:ControlFlow + * @method + * @see [async.whilst]{@link module:ControlFlow.whilst} + * @category Control Flow + * @param {AsyncFunction} iteratee - A function which is called each time `test` + * passes. Invoked with (callback). + * @param {AsyncFunction} test - asynchronous truth test to perform after each + * execution of `iteratee`. Invoked with (...args, callback), where `...args` are the + * non-error args from the previous callback of `iteratee`. + * @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 + */ +function doWhilst(iteratee, test, callback) { + callback = (0, _onlyOnce2.default)(callback); + var _fn = (0, _wrapAsync2.default)(iteratee); + var _test = (0, _wrapAsync2.default)(test); + var results; + + function next(err, ...args) { + if (err) return callback(err); + if (err === false) return; + results = args; + _test(...args, check); + } + + function check(err, truth) { + if (err) return callback(err); + if (err === false) return; + if (!truth) return callback(null, ...results); + _fn(next); + } + + return check(null, true); +} + +exports.default = (0, _awaitify2.default)(doWhilst, 3); +module.exports = exports['default'];
\ No newline at end of file |