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