@commaai/pandajs/lib/delay.js

JavaScript interface for communicating with Panda devices.

'use strict';

var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _possibleConstructorReturn2 = require('babel-runtime/helpers/possibleConstructorReturn');

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _inherits2 = require('babel-runtime/helpers/inherits');

var _inherits3 = _interopRequireDefault(_inherits2);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var CancelError = function (_Error) {
	(0, _inherits3.default)(CancelError, _Error);

	function CancelError(message) {
		(0, _classCallCheck3.default)(this, CancelError);

		var _this = (0, _possibleConstructorReturn3.default)(this, (CancelError.__proto__ || Object.getPrototypeOf(CancelError)).call(this, message));

		_this.name = 'CancelError';
		return _this;
	}

	return CancelError;
}(Error);

var createDelay = function createDelay(willResolve) {
	return function (ms, value) {
		var timeoutId = void 0;
		var internalReject = void 0;

		var delayPromise = new Promise(function (resolve, reject) {
			internalReject = reject;

			timeoutId = setTimeout(function () {
				var settle = willResolve ? resolve : reject;
				settle(value);
			}, ms);
		});

		delayPromise.cancel = function () {
			if (timeoutId) {
				clearTimeout(timeoutId);
				timeoutId = null;
				internalReject(new CancelError('Delay canceled'));
			}
		};

		return delayPromise;
	};
};

module.exports = createDelay(true);
module.exports.reject = createDelay(false);
module.exports.CancelError = CancelError;