/**
 * @license
 * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Waits for the given ReadableStream
 */
function waitFor(stream) {
    return new Promise((resolve, reject) => {
        stream.on('end', resolve);
        stream.on('error', reject);
    });
}
exports.waitFor = waitFor;
/**
 * Waits for all the given ReadableStreams
 */
function waitForAll(streams) {
    return Promise.all(streams.map((s) => waitFor(s)));
}
exports.waitForAll = waitForAll;
/**
 * pipeStreams() takes in a collection streams and pipes them together,
 * returning the last stream in the pipeline. Each element in the `streams`
 * array must be either a stream, or an array of streams (see PipeStream).
 * pipeStreams() will then flatten this array before piping them all together.
 */
function pipeStreams(streams) {
    return Array.prototype.concat.apply([], streams)
        .reduce((a, b) => {
        return a.pipe(b);
    });
}
exports.pipeStreams = pipeStreams;
