/*
This file is part of web3.js.
web3.js is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
web3.js is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with web3.js. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file index.js
* @author Fabian Vogelsteller <fabian@ethereum.org>
* @date 2016
*/
"use strict";
var EventEmitter = require('eventemitter3');
/**
* This function generates a defer promise and adds eventEmitter functionality to it
*
* @method eventifiedPromise
*/
var PromiEvent = function PromiEvent(justPromise) {
var resolve, reject, eventEmitter = new Promise(function () {
resolve = arguments[0];
reject = arguments[1];
});
if (justPromise) {
return {
resolve: resolve,
reject: reject,
eventEmitter: eventEmitter
};
}
// get eventEmitter
var emitter = new EventEmitter();
// add eventEmitter to the promise
eventEmitter._events = emitter._events;
eventEmitter.emit = emitter.emit;
eventEmitter.on = emitter.on;
eventEmitter.once = emitter.once;
eventEmitter.off = emitter.off;
eventEmitter.listeners = emitter.listeners;
eventEmitter.addListener = emitter.addListener;
eventEmitter.removeListener = emitter.removeListener;
eventEmitter.removeAllListeners = emitter.removeAllListeners;
return {
resolve: resolve,
reject: reject,
eventEmitter: eventEmitter
};
};
PromiEvent.resolve = function (value) {
var promise = PromiEvent(true);
promise.resolve(value);
return promise.eventEmitter;
};
module.exports = PromiEvent;