| 1 | var EventEmitter = require('events').EventEmitter;
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| 2 | var async = require('async');
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| 3 | var request = require('request');
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| 4 | var iTunes = require('itunes-control');
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| 5 | var fs = require('fs');
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| 6 | var util = require('util');
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| 7 | var google = require('./providers/google');
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| 8 |
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| 9 | var MAX_DOWNLOADS_PER_TIME = 10;
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| 10 | var DOWNLOAD_DIR = process.env.HOME + '/.gmsync-cache';
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| 11 | var isWin = /win/.test(process.platform);
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| 12 |
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| 13 | function downloadPlalist(songs, path, name) {
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| 14 | var ee = new EventEmitter();
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| 15 | var playlistName = 'gm-' + name;
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| 16 | var downloadDir = path ?
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| 17 | (path + '/' + name.replace(/[\/\\]/g, '_')).replace(/\/+/g, '/') :
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| 18 | DOWNLOAD_DIR;
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| 19 |
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| 20 | function downloadSong(song, cb) {
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| 21 | var filename = getFileName(song);
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| 22 | var unfinishedFilename = filename + '-part';
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| 23 | google.getStreamUrl(song.storeId, function (err, url) {
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| 24 | request(url)
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| 25 | .pipe(fs.createWriteStream(unfinishedFilename))
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| 26 | .on('error', function (err) {
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| 27 | console.error('Error while downloading', err)
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| 28 | })
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| 29 | .on('close', function () {
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| 30 | fs.rename(unfinishedFilename, filename, cb);
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| 31 | });
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| 32 | });
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| 33 | }
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| 34 |
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| 35 | function getFileName(song) {
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| 36 | var title = song.title.replace(/\//g, '-').replace(/"/g, '\'');
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| 37 | return util.format('%s/%s — %s.mp3', downloadDir, song.artist, title);
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| 38 | }
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| 39 |
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| 40 | function task(song, cb) {
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| 41 | var filename = getFileName(song);
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| 42 | fs.readFile(filename, function (err) {
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| 43 | function add() {
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| 44 | if (isWin) {
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| 45 | ee.emit('item');
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| 46 | cb();
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| 47 | return;
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| 48 | }
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| 49 | return iTunes.addToPlaylist(playlistName, filename, function (err) {
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| 50 | if (err) {
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| 51 | return setTimeout(add, 1000);
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| 52 | }
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| 53 | ee.emit('item');
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| 54 | cb();
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| 55 | });
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| 56 | }
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| 57 | if (!err) {
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| 58 | return add();
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| 59 | }
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| 60 | downloadSong(song, function (err) {
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| 61 | if (err) {
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| 62 | return cb(err);
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| 63 | }
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| 64 | add();
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| 65 | });
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| 66 | });
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| 67 | }
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| 68 |
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| 69 | try {
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| 70 | fs.mkdirSync(downloadDir);
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| 71 | } catch (e) {
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| 72 | console.log(e);
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| 73 | if (e.code === 'ENOENT') {
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| 74 | console.error('\n\nNo such directory "%s"\n', path);
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| 75 | return ee;
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| 76 | }
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| 77 | };
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| 78 |
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| 79 | function load() {
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| 80 | async.eachLimit(songs, MAX_DOWNLOADS_PER_TIME, task, function (err) {
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| 81 | if (err) {
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| 82 | return console.error(err);
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| 83 | }
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| 84 | ee.emit('end');
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| 85 | });
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| 86 | }
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| 87 |
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| 88 | if (isWin) {
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| 89 | load();
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| 90 | } else {
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| 91 | iTunes.createPlaylist(playlistName, load);
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| 92 | }
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| 93 |
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| 94 | return ee;
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| 95 |
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| 96 | }
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| 97 |
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| 98 | module.exports = downloadPlalist;
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