Merge branch 'master' into playback-priority

# Conflicts:
#	src/renderer/controllers/playback-controller.js
#	src/renderer/controllers/torrent-list-controller.js
#	src/renderer/main.js

src/.babelrc

@@ -1,8 +0,0 @@
-{
-  "plugins": [
-    "syntax-jsx",
-    "transform-es2015-destructuring",
-    "transform-object-rest-spread",
-    "transform-react-jsx"
-  ]
-}

src/config.js

@@ -1,12 +1,21 @@
-var appConfig = require('application-config')('WebTorrent')
-var fs = require('fs')
-var path = require('path')
+const appConfig = require('application-config')('WebTorrent')
+const path = require('path')
+const electron = require('electron')
+const arch = require('arch')
 
-var APP_NAME = 'WebTorrent'
-var APP_TEAM = 'WebTorrent, LLC'
-var APP_VERSION = require('../package.json').version
+const APP_NAME = 'WebTorrent'
+const APP_TEAM = 'WebTorrent, LLC'
+const APP_VERSION = require('../package.json').version
 
-var PORTABLE_PATH = path.join(path.dirname(process.execPath), 'Portable Settings')
+const IS_TEST = isTest()
+const PORTABLE_PATH = IS_TEST
+  ? path.join(process.platform === 'win32' ? 'C:\\Windows\\Temp' : '/tmp', 'WebTorrentTest')
+  : path.join(path.dirname(process.execPath), 'Portable Settings')
+const IS_PRODUCTION = isProduction()
+const IS_PORTABLE = isPortable()
+
+const UI_HEADER_HEIGHT = 38
+const UI_TORRENT_HEIGHT = 100
 
 module.exports = {
   ANNOUNCEMENT_URL: 'https://webtorrent.io/desktop/announcement',
@@ -14,7 +23,7 @@ module.exports = {
   CRASH_REPORT_URL: 'https://webtorrent.io/desktop/crash-report',
   TELEMETRY_URL: 'https://webtorrent.io/desktop/telemetry',
 
-  APP_COPYRIGHT: 'Copyright © 2014-2016 ' + APP_TEAM,
+  APP_COPYRIGHT: 'Copyright © 2014-2017 ' + APP_TEAM,
   APP_FILE_ICON: path.join(__dirname, '..', 'static', 'WebTorrentFile'),
   APP_ICON: path.join(__dirname, '..', 'static', 'WebTorrent'),
   APP_NAME: APP_NAME,
@@ -26,27 +35,32 @@ module.exports = {
 
   DEFAULT_TORRENTS: [
     {
+      testID: 'bbb',
       name: 'Big Buck Bunny',
       posterFileName: 'bigBuckBunny.jpg',
       torrentFileName: 'bigBuckBunny.torrent'
     },
     {
+      testID: 'cosmos',
       name: 'Cosmos Laundromat (Preview)',
       posterFileName: 'cosmosLaundromat.jpg',
       torrentFileName: 'cosmosLaundromat.torrent'
     },
     {
+      testID: 'sintel',
       name: 'Sintel',
       posterFileName: 'sintel.jpg',
       torrentFileName: 'sintel.torrent'
     },
     {
+      testID: 'tears',
       name: 'Tears of Steel',
       posterFileName: 'tearsOfSteel.jpg',
       torrentFileName: 'tearsOfSteel.torrent'
     },
     {
-      name: 'The WIRED CD - Rip. Sample. Mash. Share.',
+      testID: 'wired',
+      name: 'The WIRED CD - Rip. Sample. Mash. Share',
       posterFileName: 'wiredCd.jpg',
       torrentFileName: 'wiredCd.torrent'
     }
@@ -62,8 +76,11 @@ module.exports = {
 
   HOME_PAGE_URL: 'https://webtorrent.io',
 
-  IS_PORTABLE: isPortable(),
-  IS_PRODUCTION: isProduction(),
+  IS_PORTABLE: IS_PORTABLE,
+  IS_PRODUCTION: IS_PRODUCTION,
+  IS_TEST: IS_TEST,
+
+  OS_SYSARCH: arch() === 'x64' ? 'x64' : 'ia32',
 
   POSTER_PATH: path.join(getConfigPath(), 'Posters'),
   ROOT_PATH: path.join(__dirname, '..'),
@@ -74,12 +91,19 @@ module.exports = {
   WINDOW_MAIN: 'file://' + path.join(__dirname, '..', 'static', 'main.html'),
   WINDOW_WEBTORRENT: 'file://' + path.join(__dirname, '..', 'static', 'webtorrent.html'),
 
-  WINDOW_MIN_HEIGHT: 38 + (120 * 2), // header height + 2 torrents
-  WINDOW_MIN_WIDTH: 425
+  WINDOW_INITIAL_BOUNDS: {
+    width: 500,
+    height: UI_HEADER_HEIGHT + (UI_TORRENT_HEIGHT * 6) // header + 6 torrents
+  },
+  WINDOW_MIN_HEIGHT: UI_HEADER_HEIGHT + (UI_TORRENT_HEIGHT * 2), // header + 2 torrents
+  WINDOW_MIN_WIDTH: 425,
+
+  UI_HEADER_HEIGHT: UI_HEADER_HEIGHT,
+  UI_TORRENT_HEIGHT: UI_TORRENT_HEIGHT
 }
 
 function getConfigPath () {
-  if (isPortable()) {
+  if (IS_PORTABLE) {
     return PORTABLE_PATH
   } else {
     return path.dirname(appConfig.filePath)
@@ -87,24 +111,47 @@ function getConfigPath () {
 }
 
 function getDefaultDownloadPath () {
-  if (!process || !process.type) {
-    return ''
-  }
-
-  if (isPortable()) {
+  if (IS_PORTABLE) {
     return path.join(getConfigPath(), 'Downloads')
+  } else {
+    return getPath('downloads')
   }
+}
 
-  var electron = require('electron')
+function getPath (key) {
+  if (!process.versions.electron) {
+    // Node.js process
+    return ''
+  } else if (process.type === 'renderer') {
+    // Electron renderer process
+    return electron.remote.app.getPath(key)
+  } else {
+    // Electron main process
+    return electron.app.getPath(key)
+  }
+}
 
-  return process.type === 'renderer'
-    ? electron.remote.app.getPath('downloads')
-    : electron.app.getPath('downloads')
+function isTest () {
+  return process.env.NODE_ENV === 'test'
 }
 
 function isPortable () {
+  if (IS_TEST) {
+    return true
+  }
+
+  if (process.platform !== 'win32' || !IS_PRODUCTION) {
+    // Fast path: Non-Windows platforms should not check for path on disk
+    return false
+  }
+
+  const fs = require('fs')
+
   try {
-    return process.platform === 'win32' && isProduction() && !!fs.statSync(PORTABLE_PATH)
+    // This line throws if the "Portable Settings" folder does not exist, and does
+    // nothing otherwise.
+    fs.accessSync(PORTABLE_PATH, fs.constants.R_OK | fs.constants.W_OK)
+    return true
   } catch (err) {
     return false
   }
@@ -112,6 +159,7 @@ function isPortable () {
 
 function isProduction () {
   if (!process.versions.electron) {
+    // Node.js process
     return false
   }
   if (process.platform === 'darwin') {

src/crash-reporter.js

@@ -2,10 +2,10 @@ module.exports = {
   init
 }
 
-var config = require('./config')
-var electron = require('electron')
-
 function init () {
+  const config = require('./config')
+  const electron = require('electron')
+
   electron.crashReporter.start({
     companyName: config.APP_NAME,
     productName: config.APP_NAME,

src/main/announcement.js

@@ -2,12 +2,12 @@ module.exports = {
   init
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var config = require('../config')
-var log = require('./log')
+const config = require('../config')
+const log = require('./log')
 
-var ANNOUNCEMENT_URL = config.ANNOUNCEMENT_URL +
+const ANNOUNCEMENT_URL = config.ANNOUNCEMENT_URL +
   '?version=' + config.APP_VERSION +
   '&platform=' + process.platform
 
@@ -26,7 +26,7 @@ var ANNOUNCEMENT_URL = config.ANNOUNCEMENT_URL +
  *   }
  */
 function init () {
-  var get = require('simple-get')
+  const get = require('simple-get')
   get.concat(ANNOUNCEMENT_URL, onResponse)
 }
 

src/main/dialog.js

@@ -6,10 +6,10 @@ module.exports = {
   openFiles
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var log = require('./log')
-var windows = require('./windows')
+const log = require('./log')
+const windows = require('./windows')
 
 /**
  * Show open dialog to create a single-file torrent.
@@ -17,16 +17,11 @@ var windows = require('./windows')
 function openSeedFile () {
   if (!windows.main.win) return
   log('openSeedFile')
-  var opts = {
+  const opts = {
     title: 'Select a file for the torrent.',
     properties: [ 'openFile' ]
   }
-  setTitle(opts.title)
-  electron.dialog.showOpenDialog(windows.main.win, opts, function (selectedPaths) {
-    resetTitle()
-    if (!Array.isArray(selectedPaths)) return
-    windows.main.dispatch('showCreateTorrent', selectedPaths)
-  })
+  showOpenSeed(opts)
 }
 
 /*
@@ -37,7 +32,7 @@ function openSeedFile () {
 function openSeedDirectory () {
   if (!windows.main.win) return
   log('openSeedDirectory')
-  var opts = process.platform === 'darwin'
+  const opts = process.platform === 'darwin'
     ? {
       title: 'Select a file or folder for the torrent.',
       properties: [ 'openFile', 'openDirectory' ]
@@ -46,12 +41,7 @@ function openSeedDirectory () {
       title: 'Select a folder for the torrent.',
       properties: [ 'openDirectory' ]
     }
-  setTitle(opts.title)
-  electron.dialog.showOpenDialog(windows.main.win, opts, function (selectedPaths) {
-    resetTitle()
-    if (!Array.isArray(selectedPaths)) return
-    windows.main.dispatch('showCreateTorrent', selectedPaths)
-  })
+  showOpenSeed(opts)
 }
 
 /*
@@ -61,7 +51,7 @@ function openSeedDirectory () {
 function openFiles () {
   if (!windows.main.win) return
   log('openFiles')
-  var opts = process.platform === 'darwin'
+  const opts = process.platform === 'darwin'
     ? {
       title: 'Select a file or folder to add.',
       properties: [ 'openFile', 'openDirectory' ]
@@ -84,7 +74,7 @@ function openFiles () {
 function openTorrentFile () {
   if (!windows.main.win) return
   log('openTorrentFile')
-  var opts = {
+  const opts = {
     title: 'Select a .torrent file.',
     filters: [{ name: 'Torrent Files', extensions: ['torrent'] }],
     properties: [ 'openFile', 'multiSelections' ]
@@ -119,3 +109,16 @@ function setTitle (title) {
 function resetTitle () {
   windows.main.dispatch('resetTitle')
 }
+
+/**
+ * Pops up an Open File dialog with the given options.
+ * After the user selects files / folders, shows the Create Torrent page.
+ */
+function showOpenSeed (opts) {
+  setTitle(opts.title)
+  electron.dialog.showOpenDialog(windows.main.win, opts, function (selectedPaths) {
+    resetTitle()
+    if (!Array.isArray(selectedPaths)) return
+    windows.main.dispatch('showCreateTorrent', selectedPaths)
+  })
+}

src/main/dock.js

@@ -4,19 +4,17 @@ module.exports = {
   setBadge
 }
 
-var electron = require('electron')
+const {app, Menu} = require('electron')
 
-var app = electron.app
-
-var dialog = require('./dialog')
-var log = require('./log')
+const dialog = require('./dialog')
+const log = require('./log')
 
 /**
  * Add a right-click menu to the dock icon. (Mac)
  */
 function init () {
   if (!app.dock) return
-  var menu = electron.Menu.buildFromTemplate(getMenuTemplate())
+  const menu = Menu.buildFromTemplate(getMenuTemplate())
   app.dock.setMenu(menu)
 }
 
@@ -33,8 +31,11 @@ function downloadFinished (path) {
  * Display a counter badge for the app. (Mac, Linux)
  */
 function setBadge (count) {
-  log(`setBadge: ${count}`)
-  app.setBadgeCount(Number(count))
+  if (process.platform === 'darwin' ||
+      (process.platform === 'linux' && app.isUnityRunning())) {
+    log(`setBadge: ${count}`)
+    app.setBadgeCount(Number(count))
+  }
 }
 
 function getMenuTemplate () {

src/main/external-player.js

@@ -4,29 +4,36 @@ module.exports = {
   checkInstall
 }
 
-var cp = require('child_process')
-var vlcCommand = require('vlc-command')
+const cp = require('child_process')
+const path = require('path')
+const vlcCommand = require('vlc-command')
 
-var log = require('./log')
-var windows = require('./windows')
+const log = require('./log')
+const windows = require('./windows')
 
 // holds a ChildProcess while we're playing a video in an external player, null otherwise
-var proc
+let proc = null
 
-function checkInstall (path, cb) {
+function checkInstall (playerPath, cb) {
   // check for VLC if external player has not been specified by the user
   // otherwise assume the player is installed
-  if (path == null) return vlcCommand((err) => cb(!err))
-  process.nextTick(() => cb(true))
+  if (playerPath == null) return vlcCommand(cb)
+  process.nextTick(() => cb(null))
 }
 
-function spawn (path, url, title) {
-  if (path != null) return spawnExternal(path, [url])
+function spawn (playerPath, url, title) {
+  if (playerPath != null) return spawnExternal(playerPath, [url])
 
   // Try to find and use VLC if external player is not specified
   vlcCommand(function (err, vlcPath) {
     if (err) return windows.main.dispatch('externalPlayerNotFound')
-    var args = ['--play-and-exit', '--video-on-top', '--quiet', `--meta-title=${JSON.stringify(title)}`, url]
+    const args = [
+      '--play-and-exit',
+      '--video-on-top',
+      '--quiet',
+      `--meta-title=${JSON.stringify(title)}`,
+      url
+    ]
     spawnExternal(vlcPath, args)
   })
 }
@@ -38,13 +45,18 @@ function kill () {
   proc = null
 }
 
-function spawnExternal (path, args) {
-  log('Running external media player:', path + ' ' + args.join(' '))
+function spawnExternal (playerPath, args) {
+  log('Running external media player:', playerPath + ' ' + args.join(' '))
 
-  proc = cp.spawn(path, args, {stdio: 'ignore'})
+  if (process.platform === 'darwin' && path.extname(playerPath) === '.app') {
+    // Mac: Use executable in packaged .app bundle
+    playerPath += '/Contents/MacOS/' + path.basename(playerPath, '.app')
+  }
+
+  proc = cp.spawn(playerPath, args, {stdio: 'ignore'})
 
   // If it works, close the modal after a second
-  var closeModalTimeout = setTimeout(() =>
+  const closeModalTimeout = setTimeout(() =>
     windows.main.dispatch('exitModal'), 1000)
 
   proc.on('close', function (code) {

src/main/handlers.js

@@ -3,8 +3,8 @@ module.exports = {
   uninstall
 }
 
-var config = require('../config')
-var path = require('path')
+const config = require('../config')
+const path = require('path')
 
 function install () {
   if (process.platform === 'darwin') {
@@ -31,8 +31,8 @@ function uninstall () {
 }
 
 function installDarwin () {
-  var electron = require('electron')
-  var app = electron.app
+  const electron = require('electron')
+  const app = electron.app
 
   // On Mac, only protocols that are listed in `Info.plist` can be set as the
   // default handler at runtime.
@@ -44,18 +44,18 @@ function installDarwin () {
 
 function uninstallDarwin () {}
 
-var EXEC_COMMAND = [ process.execPath ]
+const EXEC_COMMAND = [ process.execPath ]
 
 if (!config.IS_PRODUCTION) {
   EXEC_COMMAND.push(config.ROOT_PATH)
 }
 
 function installWin32 () {
-  var Registry = require('winreg')
+  const Registry = require('winreg')
 
-  var log = require('./log')
+  const log = require('./log')
 
-  var iconPath = path.join(
+  const iconPath = path.join(
     process.resourcesPath, 'app.asar.unpacked', 'static', 'WebTorrentFile.ico'
   )
   registerProtocolHandlerWin32(
@@ -100,7 +100,7 @@ function installWin32 () {
    */
 
   function registerProtocolHandlerWin32 (protocol, name, icon, command) {
-    var protocolKey = new Registry({
+    const protocolKey = new Registry({
       hive: Registry.HKCU, // HKEY_CURRENT_USER
       key: '\\Software\\Classes\\' + protocol
     })
@@ -120,7 +120,7 @@ function installWin32 () {
     function setIcon (err) {
       if (err) log.error(err.message)
 
-      var iconKey = new Registry({
+      const iconKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + protocol + '\\DefaultIcon'
       })
@@ -130,7 +130,7 @@ function installWin32 () {
     function setCommand (err) {
       if (err) log.error(err.message)
 
-      var commandKey = new Registry({
+      const commandKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + protocol + '\\shell\\open\\command'
       })
@@ -161,7 +161,7 @@ function installWin32 () {
     setExt()
 
     function setExt () {
-      var extKey = new Registry({
+      const extKey = new Registry({
         hive: Registry.HKCU, // HKEY_CURRENT_USER
         key: '\\Software\\Classes\\' + ext
       })
@@ -171,7 +171,7 @@ function installWin32 () {
     function setId (err) {
       if (err) log.error(err.message)
 
-      var idKey = new Registry({
+      const idKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + id
       })
@@ -181,7 +181,7 @@ function installWin32 () {
     function setIcon (err) {
       if (err) log.error(err.message)
 
-      var iconKey = new Registry({
+      const iconKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + id + '\\DefaultIcon'
       })
@@ -191,7 +191,7 @@ function installWin32 () {
     function setCommand (err) {
       if (err) log.error(err.message)
 
-      var commandKey = new Registry({
+      const commandKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + id + '\\shell\\open\\command'
       })
@@ -205,7 +205,7 @@ function installWin32 () {
 }
 
 function uninstallWin32 () {
-  var Registry = require('winreg')
+  const Registry = require('winreg')
 
   unregisterProtocolHandlerWin32('magnet', EXEC_COMMAND)
   unregisterProtocolHandlerWin32('stream-magnet', EXEC_COMMAND)
@@ -215,7 +215,7 @@ function uninstallWin32 () {
     getCommand()
 
     function getCommand () {
-      var commandKey = new Registry({
+      const commandKey = new Registry({
         hive: Registry.HKCU, // HKEY_CURRENT_USER
         key: '\\Software\\Classes\\' + protocol + '\\shell\\open\\command'
       })
@@ -227,7 +227,7 @@ function uninstallWin32 () {
     }
 
     function destroyProtocol () {
-      var protocolKey = new Registry({
+      const protocolKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + protocol
       })
@@ -239,7 +239,7 @@ function uninstallWin32 () {
     eraseId()
 
     function eraseId () {
-      var idKey = new Registry({
+      const idKey = new Registry({
         hive: Registry.HKCU, // HKEY_CURRENT_USER
         key: '\\Software\\Classes\\' + id
       })
@@ -247,7 +247,7 @@ function uninstallWin32 () {
     }
 
     function getExt () {
-      var extKey = new Registry({
+      const extKey = new Registry({
         hive: Registry.HKCU,
         key: '\\Software\\Classes\\' + ext
       })
@@ -259,7 +259,7 @@ function uninstallWin32 () {
     }
 
     function destroyExt () {
-      var extKey = new Registry({
+      const extKey = new Registry({
         hive: Registry.HKCU, // HKEY_CURRENT_USER
         key: '\\Software\\Classes\\' + ext
       })
@@ -273,12 +273,12 @@ function commandToArgs (command) {
 }
 
 function installLinux () {
-  var fs = require('fs-extra')
-  var os = require('os')
-  var path = require('path')
+  const fs = require('fs')
+  const os = require('os')
+  const path = require('path')
 
-  var config = require('../config')
-  var log = require('./log')
+  const config = require('../config')
+  const log = require('./log')
 
   // Do not install in user dir if running on system
   if (/^\/opt/.test(process.execPath)) return
@@ -287,7 +287,7 @@ function installLinux () {
   installIconFile()
 
   function installDesktopFile () {
-    var templatePath = path.join(
+    const templatePath = path.join(
       config.STATIC_PATH, 'linux', 'webtorrent-desktop.desktop'
     )
     fs.readFile(templatePath, 'utf8', writeDesktopFile)
@@ -296,7 +296,7 @@ function installLinux () {
   function writeDesktopFile (err, desktopFile) {
     if (err) return log.error(err.message)
 
-    var appPath = config.IS_PRODUCTION
+    const appPath = config.IS_PRODUCTION
       ? path.dirname(process.execPath)
       : config.ROOT_PATH
 
@@ -305,7 +305,7 @@ function installLinux () {
     desktopFile = desktopFile.replace(/\$EXEC_PATH/g, EXEC_COMMAND.join(' '))
     desktopFile = desktopFile.replace(/\$TRY_EXEC_PATH/g, process.execPath)
 
-    var desktopFilePath = path.join(
+    const desktopFilePath = path.join(
       os.homedir(),
       '.local',
       'share',
@@ -319,47 +319,51 @@ function installLinux () {
   }
 
   function installIconFile () {
-    var iconStaticPath = path.join(config.STATIC_PATH, 'WebTorrent.png')
+    const iconStaticPath = path.join(config.STATIC_PATH, 'WebTorrent.png')
     fs.readFile(iconStaticPath, writeIconFile)
   }
 
   function writeIconFile (err, iconFile) {
     if (err) return log.error(err.message)
 
-    var iconFilePath = path.join(
+    const mkdirp = require('mkdirp')
+
+    const iconFilePath = path.join(
       os.homedir(),
       '.local',
       'share',
       'icons',
       'webtorrent-desktop.png'
     )
-    fs.mkdirp(path.dirname(iconFilePath))
-    fs.writeFile(iconFilePath, iconFile, function (err) {
+    mkdirp(path.dirname(iconFilePath), (err) => {
       if (err) return log.error(err.message)
+      fs.writeFile(iconFilePath, iconFile, (err) => {
+        if (err) log.error(err.message)
+      })
     })
   }
 }
 
 function uninstallLinux () {
-  var os = require('os')
-  var path = require('path')
-  var fs = require('fs-extra')
+  const os = require('os')
+  const path = require('path')
+  const rimraf = require('rimraf')
 
-  var desktopFilePath = path.join(
+  const desktopFilePath = path.join(
     os.homedir(),
     '.local',
     'share',
     'applications',
     'webtorrent-desktop.desktop'
   )
-  fs.removeSync(desktopFilePath)
+  rimraf(desktopFilePath)
 
-  var iconFilePath = path.join(
+  const iconFilePath = path.join(
     os.homedir(),
     '.local',
     'share',
     'icons',
     'webtorrent-desktop.png'
   )
-  fs.removeSync(iconFilePath)
+  rimraf(iconFilePath)
 }

src/main/index.js

@@ -1,26 +1,25 @@
 console.time('init')
 
-var electron = require('electron')
+const electron = require('electron')
+const app = electron.app
 
-var app = electron.app
-var ipcMain = electron.ipcMain
+const parallel = require('run-parallel')
 
-var announcement = require('./announcement')
-var config = require('../config')
-var crashReporter = require('../crash-reporter')
-var dialog = require('./dialog')
-var dock = require('./dock')
-var ipc = require('./ipc')
-var log = require('./log')
-var menu = require('./menu')
-var squirrelWin32 = require('./squirrel-win32')
-var tray = require('./tray')
-var updater = require('./updater')
-var userTasks = require('./user-tasks')
-var windows = require('./windows')
+const config = require('../config')
+const crashReporter = require('../crash-reporter')
+const ipc = require('./ipc')
+const log = require('./log')
+const menu = require('./menu')
+const State = require('../renderer/lib/state')
+const windows = require('./windows')
 
-var shouldQuit = false
-var argv = sliceArgv(process.argv)
+let shouldQuit = false
+let argv = sliceArgv(process.argv)
+
+// Start the app without showing the main window when auto launching on login
+// (On Windows and Linux, we get a flag. On MacOS, we get special API.)
+const hidden = argv.includes('--hidden') ||
+  (process.platform === 'darwin' && app.getLoginItemSettings().wasOpenedAsHidden)
 
 if (config.IS_PRODUCTION) {
   // When Electron is running in production mode (packaged app), then run React
@@ -29,13 +28,16 @@ if (config.IS_PRODUCTION) {
 }
 
 if (process.platform === 'win32') {
+  const squirrelWin32 = require('./squirrel-win32')
   shouldQuit = squirrelWin32.handleEvent(argv[0])
   argv = argv.filter((arg) => !arg.includes('--squirrel'))
 }
 
-if (!shouldQuit) {
+if (!shouldQuit && !config.IS_PORTABLE) {
   // Prevent multiple instances of app from running at same time. New instances
-  // signal this instance and quit.
+  // signal this instance and quit. Note: This feature creates a lock file in
+  // %APPDATA%\Roaming\WebTorrent so we do not do it for the Portable App since
+  // we want to be "silent" as well as "portable".
   shouldQuit = app.makeSingleInstance(onAppOpen)
   if (shouldQuit) {
     app.quit()
@@ -48,27 +50,30 @@ if (!shouldQuit) {
 
 function init () {
   if (config.IS_PORTABLE) {
+    const path = require('path')
+    // Put all user data into the "Portable Settings" folder
     app.setPath('userData', config.CONFIG_PATH)
+    // Put Electron crash files, etc. into the "Portable Settings\Temp" folder
+    app.setPath('temp', path.join(config.CONFIG_PATH, 'Temp'))
   }
 
-  var isReady = false // app ready, windows can be created
+  const ipcMain = electron.ipcMain
+
+  let isReady = false // app ready, windows can be created
   app.ipcReady = false // main window has finished loading and IPC is ready
   app.isQuitting = false
 
-  // Open handlers must be added as early as possible
-  app.on('open-file', onOpen)
-  app.on('open-url', onOpen)
+  parallel({
+    appReady: (cb) => app.on('ready', () => cb(null)),
+    state: (cb) => State.load(cb)
+  }, onReady)
 
-  ipc.init()
+  function onReady (err, results) {
+    if (err) throw err
 
-  app.once('will-finish-launching', function () {
-    crashReporter.init()
-  })
-
-  app.on('ready', function () {
     isReady = true
 
-    windows.main.init()
+    windows.main.init(results.state, {hidden: hidden})
     windows.webtorrent.init()
     menu.init()
 
@@ -78,9 +83,18 @@ function init () {
     // Report uncaught exceptions
     process.on('uncaughtException', (err) => {
       console.error(err)
-      var error = {message: err.message, stack: err.stack}
+      const error = {message: err.message, stack: err.stack}
       windows.main.dispatch('uncaughtError', 'main', error)
     })
+  }
+
+  app.on('open-file', onOpen)
+  app.on('open-url', onOpen)
+
+  ipc.init()
+
+  app.once('will-finish-launching', function () {
+    crashReporter.init()
   })
 
   app.once('ipcReady', function () {
@@ -94,12 +108,12 @@ function init () {
 
     app.isQuitting = true
     e.preventDefault()
-    windows.main.dispatch('saveState') // try to save state on exit
-    ipcMain.once('savedState', () => app.quit())
+    windows.main.dispatch('stateSaveImmediate') // try to save state on exit
+    ipcMain.once('stateSaved', () => app.quit())
     setTimeout(() => {
       console.error('Saving state took too long. Quitting.')
       app.quit()
-    }, 2000) // quit after 2 secs, at most
+    }, 4000) // quit after 4 secs, at most
   })
 
   app.on('activate', function () {
@@ -108,11 +122,25 @@ function init () {
 }
 
 function delayedInit () {
+  if (app.isQuitting) return
+
+  const announcement = require('./announcement')
+  const dock = require('./dock')
+  const updater = require('./updater')
+
   announcement.init()
   dock.init()
-  tray.init()
   updater.init()
-  userTasks.init()
+
+  if (process.platform === 'win32') {
+    const userTasks = require('./user-tasks')
+    userTasks.init()
+  }
+
+  if (process.platform !== 'darwin') {
+    const tray = require('./tray')
+    tray.init()
+  }
 }
 
 function onOpen (e, torrentId) {
@@ -143,22 +171,38 @@ function onAppOpen (newArgv) {
   }
 }
 
+// Remove leading args.
+// Production: 1 arg, eg: /Applications/WebTorrent.app/Contents/MacOS/WebTorrent
+// Development: 2 args, eg: electron .
+// Test: 4 args, eg: electron -r .../mocks.js .
 function sliceArgv (argv) {
-  return argv.slice(config.IS_PRODUCTION ? 1 : 2)
+  return argv.slice(config.IS_PRODUCTION ? 1
+    : config.IS_TEST ? 4
+    : 2)
 }
 
 function processArgv (argv) {
-  var torrentIds = []
+  let torrentIds = []
   argv.forEach(function (arg) {
-    if (arg === '-n') {
-      dialog.openSeedDirectory()
-    } else if (arg === '-o') {
-      dialog.openTorrentFile()
-    } else if (arg === '-u') {
-      dialog.openTorrentAddress()
+    if (arg === '-n' || arg === '-o' || arg === '-u') {
+      // Critical path: Only load the 'dialog' package if it is needed
+      const dialog = require('./dialog')
+      if (arg === '-n') {
+        dialog.openSeedDirectory()
+      } else if (arg === '-o') {
+        dialog.openTorrentFile()
+      } else if (arg === '-u') {
+        dialog.openTorrentAddress()
+      }
+    } else if (arg === '--hidden') {
+      // Ignore hidden argument, already being handled
     } else if (arg.startsWith('-psn')) {
       // Ignore Mac launchd "process serial number" argument
       // Issue: https://github.com/feross/webtorrent-desktop/issues/214
+    } else if (arg.startsWith('--')) {
+      // Ignore Spectron flags
+    } else if (arg === 'data:,') {
+      // Ignore weird Spectron argument
     } else if (arg !== '.') {
       // Ignore '.' argument, which gets misinterpreted as a torrent id, when a
       // development copy of WebTorrent is started while a production version is

src/main/ipc.js

@@ -2,27 +2,19 @@ module.exports = {
   init
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var app = electron.app
+const app = electron.app
 
-var dialog = require('./dialog')
-var dock = require('./dock')
-var handlers = require('./handlers')
-var log = require('./log')
-var menu = require('./menu')
-var powerSaveBlocker = require('./power-save-blocker')
-var shell = require('./shell')
-var shortcuts = require('./shortcuts')
-var externalPlayer = require('./external-player')
-var windows = require('./windows')
-var thumbar = require('./thumbar')
+const log = require('./log')
+const menu = require('./menu')
+const windows = require('./windows')
 
 // Messages from the main process, to be sent once the WebTorrent process starts
-var messageQueueMainToWebTorrent = []
+const messageQueueMainToWebTorrent = []
 
 function init () {
-  var ipc = electron.ipcMain
+  const ipc = electron.ipcMain
 
   ipc.once('ipcReady', function (e) {
     app.ipcReady = true
@@ -43,40 +35,73 @@ function init () {
    * Dialog
    */
 
-  ipc.on('openTorrentFile', () => dialog.openTorrentFile())
-  ipc.on('openFiles', () => dialog.openFiles())
+  ipc.on('openTorrentFile', () => {
+    const dialog = require('./dialog')
+    dialog.openTorrentFile()
+  })
+  ipc.on('openFiles', () => {
+    const dialog = require('./dialog')
+    dialog.openFiles()
+  })
 
   /**
    * Dock
    */
 
-  ipc.on('setBadge', (e, ...args) => dock.setBadge(...args))
-  ipc.on('downloadFinished', (e, ...args) => dock.downloadFinished(...args))
+  ipc.on('setBadge', (e, ...args) => {
+    const dock = require('./dock')
+    dock.setBadge(...args)
+  })
+  ipc.on('downloadFinished', (e, ...args) => {
+    const dock = require('./dock')
+    dock.downloadFinished(...args)
+  })
 
   /**
    * Events
    */
 
   ipc.on('onPlayerOpen', function () {
-    menu.setPlayerOpen(true)
+    const powerSaveBlocker = require('./power-save-blocker')
+    const shortcuts = require('./shortcuts')
+    const thumbar = require('./thumbar')
+
+    menu.togglePlaybackControls(true)
     powerSaveBlocker.enable()
     shortcuts.enable()
     thumbar.enable()
   })
 
+  ipc.on('onPlayerUpdate', function (e, ...args) {
+    const thumbar = require('./thumbar')
+
+    menu.onPlayerUpdate(...args)
+    thumbar.onPlayerUpdate(...args)
+  })
+
   ipc.on('onPlayerClose', function () {
-    menu.setPlayerOpen(false)
+    const powerSaveBlocker = require('./power-save-blocker')
+    const shortcuts = require('./shortcuts')
+    const thumbar = require('./thumbar')
+
+    menu.togglePlaybackControls(false)
     powerSaveBlocker.disable()
     shortcuts.disable()
     thumbar.disable()
   })
 
   ipc.on('onPlayerPlay', function () {
+    const powerSaveBlocker = require('./power-save-blocker')
+    const thumbar = require('./thumbar')
+
     powerSaveBlocker.enable()
     thumbar.onPlayerPlay()
   })
 
   ipc.on('onPlayerPause', function () {
+    const powerSaveBlocker = require('./power-save-blocker')
+    const thumbar = require('./thumbar')
+
     powerSaveBlocker.disable()
     thumbar.onPlayerPause()
   })
@@ -85,23 +110,46 @@ function init () {
    * Shell
    */
 
-  ipc.on('openItem', (e, ...args) => shell.openItem(...args))
-  ipc.on('showItemInFolder', (e, ...args) => shell.showItemInFolder(...args))
-  ipc.on('moveItemToTrash', (e, ...args) => shell.moveItemToTrash(...args))
+  ipc.on('openItem', (e, ...args) => {
+    const shell = require('./shell')
+    shell.openItem(...args)
+  })
+  ipc.on('showItemInFolder', (e, ...args) => {
+    const shell = require('./shell')
+    shell.showItemInFolder(...args)
+  })
+  ipc.on('moveItemToTrash', (e, ...args) => {
+    const shell = require('./shell')
+    shell.moveItemToTrash(...args)
+  })
 
   /**
    * File handlers
    */
+
   ipc.on('setDefaultFileHandler', (e, flag) => {
+    const handlers = require('./handlers')
+
     if (flag) handlers.install()
     else handlers.uninstall()
   })
 
+  /**
+   * Auto start on login
+   */
+
+  ipc.on('setStartup', (e, flag) => {
+    const startup = require('./startup')
+
+    if (flag) startup.install()
+    else startup.uninstall()
+  })
+
   /**
    * Windows: Main
    */
 
-  var main = windows.main
+  const main = windows.main
 
   ipc.on('setAspectRatio', (e, ...args) => main.setAspectRatio(...args))
   ipc.on('setBounds', (e, ...args) => main.setBounds(...args))
@@ -116,16 +164,32 @@ function init () {
    */
 
   ipc.on('checkForExternalPlayer', function (e, path) {
-    externalPlayer.checkInstall(path, function (isInstalled) {
-      windows.main.send('checkForExternalPlayer', isInstalled)
+    const externalPlayer = require('./external-player')
+
+    externalPlayer.checkInstall(path, function (err) {
+      windows.main.send('checkForExternalPlayer', !err)
     })
   })
 
-  ipc.on('openExternalPlayer', (e, ...args) => externalPlayer.spawn(...args))
-  ipc.on('quitExternalPlayer', () => externalPlayer.kill())
+  ipc.on('openExternalPlayer', (e, ...args) => {
+    const externalPlayer = require('./external-player')
+    const thumbar = require('./thumbar')
 
-  // Capture all events
-  var oldEmit = ipc.emit
+    menu.togglePlaybackControls(false)
+    thumbar.disable()
+    externalPlayer.spawn(...args)
+  })
+
+  ipc.on('quitExternalPlayer', () => {
+    const externalPlayer = require('./external-player')
+    externalPlayer.kill()
+  })
+
+  /**
+   * Message passing
+   */
+
+  const oldEmit = ipc.emit
   ipc.emit = function (name, e, ...args) {
     // Relay messages between the main window and the WebTorrent hidden window
     if (name.startsWith('wt-') && !app.isQuitting) {

src/main/log.js

@@ -8,10 +8,10 @@ module.exports.error = error
  * where they can be viewed in Developer Tools.
  */
 
-var electron = require('electron')
-var windows = require('./windows')
+const electron = require('electron')
+const windows = require('./windows')
 
-var app = electron.app
+const app = electron.app
 
 function log (...args) {
   if (app.ipcReady) {

src/main/menu.js

@@ -1,30 +1,31 @@
 module.exports = {
   init,
-  setPlayerOpen,
+  togglePlaybackControls,
   setWindowFocus,
   setAllowNav,
+  onPlayerUpdate,
   onToggleAlwaysOnTop,
   onToggleFullScreen
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var app = electron.app
+const app = electron.app
 
-var config = require('../config')
-var dialog = require('./dialog')
-var shell = require('./shell')
-var windows = require('./windows')
+const config = require('../config')
+const windows = require('./windows')
 
-var menu
+let menu = null
 
 function init () {
   menu = electron.Menu.buildFromTemplate(getMenuTemplate())
   electron.Menu.setApplicationMenu(menu)
 }
 
-function setPlayerOpen (flag) {
+function togglePlaybackControls (flag) {
   getMenuItem('Play/Pause').enabled = flag
+  getMenuItem('Skip Next').enabled = flag
+  getMenuItem('Skip Previous').enabled = flag
   getMenuItem('Increase Volume').enabled = flag
   getMenuItem('Decrease Volume').enabled = flag
   getMenuItem('Step Forward').enabled = flag
@@ -32,6 +33,16 @@ function setPlayerOpen (flag) {
   getMenuItem('Increase Speed').enabled = flag
   getMenuItem('Decrease Speed').enabled = flag
   getMenuItem('Add Subtitles File...').enabled = flag
+
+  if (flag === false) {
+    getMenuItem('Skip Next').enabled = false
+    getMenuItem('Skip Previous').enabled = false
+  }
+}
+
+function onPlayerUpdate (hasNext, hasPrevious) {
+  getMenuItem('Skip Next').enabled = hasNext
+  getMenuItem('Skip Previous').enabled = hasPrevious
 }
 
 function setWindowFocus (flag) {
@@ -59,8 +70,8 @@ function onToggleFullScreen (flag) {
 }
 
 function getMenuItem (label) {
-  for (var i = 0; i < menu.items.length; i++) {
-    var menuItem = menu.items[i].submenu.items.find(function (item) {
+  for (let i = 0; i < menu.items.length; i++) {
+    const menuItem = menu.items[i].submenu.items.find(function (item) {
       return item.label === label
     })
     if (menuItem) return menuItem
@@ -68,7 +79,7 @@ function getMenuItem (label) {
 }
 
 function getMenuTemplate () {
-  var template = [
+  const template = [
     {
       label: 'File',
       submenu: [
@@ -77,17 +88,26 @@ function getMenuTemplate () {
             ? 'Create New Torrent...'
             : 'Create New Torrent from Folder...',
           accelerator: 'CmdOrCtrl+N',
-          click: () => dialog.openSeedDirectory()
+          click: () => {
+            const dialog = require('./dialog')
+            dialog.openSeedDirectory()
+          }
         },
         {
           label: 'Open Torrent File...',
           accelerator: 'CmdOrCtrl+O',
-          click: () => dialog.openTorrentFile()
+          click: () => {
+            const dialog = require('./dialog')
+            dialog.openTorrentFile()
+          }
         },
         {
           label: 'Open Torrent Address...',
           accelerator: 'CmdOrCtrl+U',
-          click: () => dialog.openTorrentAddress()
+          click: () => {
+            const dialog = require('./dialog')
+            dialog.openTorrentAddress()
+          }
         },
         {
           type: 'separator'
@@ -187,6 +207,21 @@ function getMenuTemplate () {
         {
           type: 'separator'
         },
+        {
+          label: 'Skip Next',
+          accelerator: 'N',
+          click: () => windows.main.dispatch('nextTrack'),
+          enabled: false
+        },
+        {
+          label: 'Skip Previous',
+          accelerator: 'P',
+          click: () => windows.main.dispatch('previousTrack'),
+          enabled: false
+        },
+        {
+          type: 'separator'
+        },
         {
           label: 'Increase Volume',
           accelerator: 'CmdOrCtrl+Up',
@@ -243,31 +278,53 @@ function getMenuTemplate () {
         }
       ]
     },
+    {
+      label: 'Transfers',
+      submenu: [
+        {
+          label: 'Pause All',
+          click: () => windows.main.dispatch('pauseAllTorrents')
+        },
+        {
+          label: 'Resume All',
+          click: () => windows.main.dispatch('resumeAllTorrents')
+        }
+      ]
+    },
     {
       label: 'Help',
       role: 'help',
       submenu: [
         {
           label: 'Learn more about ' + config.APP_NAME,
-          click: () => shell.openExternal(config.HOME_PAGE_URL)
+          click: () => {
+            const shell = require('./shell')
+            shell.openExternal(config.HOME_PAGE_URL)
+          }
         },
         {
           label: 'Contribute on GitHub',
-          click: () => shell.openExternal(config.GITHUB_URL)
+          click: () => {
+            const shell = require('./shell')
+            shell.openExternal(config.GITHUB_URL)
+          }
         },
         {
           type: 'separator'
         },
         {
           label: 'Report an Issue...',
-          click: () => shell.openExternal(config.GITHUB_URL_ISSUES)
+          click: () => {
+            const shell = require('./shell')
+            shell.openExternal(config.GITHUB_URL_ISSUES)
+          }
         }
       ]
     }
   ]
 
   if (process.platform === 'darwin') {
-    // Add WebTorrent app menu (Mac)
+    // WebTorrent menu (Mac)
     template.unshift({
       label: config.APP_NAME,
       submenu: [
@@ -310,8 +367,26 @@ function getMenuTemplate () {
       ]
     })
 
-    // Add Window menu (Mac)
-    template.splice(5, 0, {
+    // Edit menu (Mac)
+    template[2].submenu.push(
+      {
+        type: 'separator'
+      },
+      {
+        label: 'Speech',
+        submenu: [
+          {
+            role: 'startspeaking'
+          },
+          {
+            role: 'stopspeaking'
+          }
+        ]
+      }
+    )
+
+    // Window menu (Mac)
+    template.splice(6, 0, {
       role: 'window',
       submenu: [
         {
@@ -333,7 +408,10 @@ function getMenuTemplate () {
     // File menu (Windows, Linux)
     template[0].submenu.unshift({
       label: 'Create New Torrent from File...',
-      click: () => dialog.openSeedFile()
+      click: () => {
+        const dialog = require('./dialog')
+        dialog.openSeedFile()
+      }
     })
 
     // Edit menu (Windows, Linux)
@@ -348,7 +426,7 @@ function getMenuTemplate () {
       })
 
     // Help menu (Windows, Linux)
-    template[4].submenu.push(
+    template[5].submenu.push(
       {
         type: 'separator'
       },

src/main/power-save-blocker.js

@@ -3,10 +3,10 @@ module.exports = {
   disable
 }
 
-var electron = require('electron')
-var log = require('./log')
+const electron = require('electron')
+const log = require('./log')
 
-var blockId = 0
+let blockId = 0
 
 /**
  * Block the system from entering low-power (sleep) mode or turning off the

src/main/shell.js

@@ -5,8 +5,8 @@ module.exports = {
   moveItemToTrash
 }
 
-var electron = require('electron')
-var log = require('./log')
+const electron = require('electron')
+const log = require('./log')
 
 /**
  * Open the given external protocol URL in the desktop’s default manner.

src/main/shortcuts.js

@@ -3,8 +3,8 @@ module.exports = {
   enable
 }
 
-var electron = require('electron')
-var windows = require('./windows')
+const electron = require('electron')
+const windows = require('./windows')
 
 function enable () {
   // Register play/pause media key, available on some keyboards.
@@ -12,9 +12,19 @@ function enable () {
     'MediaPlayPause',
     () => windows.main.dispatch('playPause')
   )
+  electron.globalShortcut.register(
+    'MediaNextTrack',
+    () => windows.main.dispatch('nextTrack')
+  )
+  electron.globalShortcut.register(
+    'MediaPreviousTrack',
+    () => windows.main.dispatch('previousTrack')
+  )
 }
 
 function disable () {
   // Return the media key to the OS, so other apps can use it.
   electron.globalShortcut.unregister('MediaPlayPause')
+  electron.globalShortcut.unregister('MediaNextTrack')
+  electron.globalShortcut.unregister('MediaPreviousTrack')
 }

src/main/squirrel-win32.js

@@ -2,18 +2,18 @@ module.exports = {
   handleEvent
 }
 
-var cp = require('child_process')
-var electron = require('electron')
-var fs = require('fs')
-var os = require('os')
-var path = require('path')
+const cp = require('child_process')
+const electron = require('electron')
+const fs = require('fs')
+const os = require('os')
+const path = require('path')
 
-var app = electron.app
+const app = electron.app
 
-var handlers = require('./handlers')
+const handlers = require('./handlers')
 
-var EXE_NAME = path.basename(process.execPath)
-var UPDATE_EXE = path.join(process.execPath, '..', '..', 'Update.exe')
+const EXE_NAME = path.basename(process.execPath)
+const UPDATE_EXE = path.join(process.execPath, '..', '..', 'Update.exe')
 
 function handleEvent (cmd) {
   if (cmd === '--squirrel-install') {
@@ -73,9 +73,9 @@ function handleEvent (cmd) {
  * the output from standard out.
  */
 function spawn (command, args, cb) {
-  var stdout = ''
-
-  var child
+  let stdout = ''
+  let error = null
+  let child = null
   try {
     child = cp.spawn(command, args)
   } catch (err) {
@@ -90,10 +90,10 @@ function spawn (command, args, cb) {
     stdout += data
   })
 
-  var error = null
   child.on('error', function (processError) {
     error = processError
   })
+
   child.on('close', function (code, signal) {
     if (code !== 0 && !error) error = new Error('Command failed: #{signal || code}')
     if (error) error.stdout = stdout
@@ -122,12 +122,12 @@ function createShortcuts (cb) {
  * command.
  */
 function updateShortcuts (cb) {
-  var homeDir = os.homedir()
+  const homeDir = os.homedir()
   if (homeDir) {
-    var desktopShortcutPath = path.join(homeDir, 'Desktop', 'WebTorrent.lnk')
+    const desktopShortcutPath = path.join(homeDir, 'Desktop', 'WebTorrent.lnk')
     // If the desktop shortcut was deleted by the user, then keep it deleted.
     fs.access(desktopShortcutPath, function (err) {
-      var desktopShortcutExists = !err
+      const desktopShortcutExists = !err
       createShortcuts(function () {
         if (desktopShortcutExists) {
           cb()

src/main/startup.js

@@ -0,0 +1,36 @@
+module.exports = {
+  install,
+  uninstall
+}
+
+const config = require('../config')
+const AutoLaunch = require('auto-launch')
+const { app } = require('electron')
+
+// On Mac, work around a bug in auto-launch where it opens a Terminal window
+// See https://github.com/Teamwork/node-auto-launch/issues/28#issuecomment-222194437
+const appPath = process.platform === 'darwin'
+  ? app.getPath('exe').replace(/\.app\/Content.*/, '.app')
+  : undefined // Use the default
+
+const appLauncher = new AutoLaunch({
+  name: config.APP_NAME,
+  path: appPath,
+  isHidden: true
+})
+
+function install () {
+  return appLauncher
+    .isEnabled()
+    .then(enabled => {
+      if (!enabled) return appLauncher.enable()
+    })
+}
+
+function uninstall () {
+  return appLauncher
+    .isEnabled()
+    .then(enabled => {
+      if (enabled) return appLauncher.disable()
+    })
+}

src/main/thumbar.js

@@ -2,7 +2,8 @@ module.exports = {
   disable,
   enable,
   onPlayerPause,
-  onPlayerPlay
+  onPlayerPlay,
+  onPlayerUpdate
 }
 
 /**
@@ -11,44 +12,80 @@ module.exports = {
  * or activating the window.
  */
 
-var path = require('path')
-var config = require('../config')
+const path = require('path')
+const config = require('../config')
 
-var windows = require('./windows')
+const windows = require('./windows')
+
+const PREV_ICON = path.join(config.STATIC_PATH, 'PreviousTrackThumbnailBarButton.png')
+const PLAY_ICON = path.join(config.STATIC_PATH, 'PlayThumbnailBarButton.png')
+const PAUSE_ICON = path.join(config.STATIC_PATH, 'PauseThumbnailBarButton.png')
+const NEXT_ICON = path.join(config.STATIC_PATH, 'NextTrackThumbnailBarButton.png')
+
+// Array indices for each button
+const PREV = 0
+const PLAY_PAUSE = 1
+const NEXT = 2
+
+let buttons = []
 
 /**
  * Show the Windows thumbnail toolbar buttons.
  */
 function enable () {
-  update(false)
+  buttons = [
+    {
+      tooltip: 'Previous Track',
+      icon: PREV_ICON,
+      click: () => windows.main.dispatch('previousTrack')
+    },
+    {
+      tooltip: 'Pause',
+      icon: PAUSE_ICON,
+      click: () => windows.main.dispatch('playPause')
+    },
+    {
+      tooltip: 'Next Track',
+      icon: NEXT_ICON,
+      click: () => windows.main.dispatch('nextTrack')
+    }
+  ]
+  update()
 }
 
 /**
  * Hide the Windows thumbnail toolbar buttons.
  */
 function disable () {
-  windows.main.win.setThumbarButtons([])
+  buttons = []
+  update()
 }
 
 function onPlayerPause () {
-  update(true)
+  if (!isEnabled()) return
+  buttons[PLAY_PAUSE].tooltip = 'Play'
+  buttons[PLAY_PAUSE].icon = PLAY_ICON
+  update()
 }
 
 function onPlayerPlay () {
-  update(false)
+  if (!isEnabled()) return
+  buttons[PLAY_PAUSE].tooltip = 'Pause'
+  buttons[PLAY_PAUSE].icon = PAUSE_ICON
+  update()
 }
 
-function update (isPaused) {
-  var icon = isPaused
-    ? 'PlayThumbnailBarButton.png'
-    : 'PauseThumbnailBarButton.png'
+function onPlayerUpdate (state) {
+  if (!isEnabled()) return
+  buttons[PREV].flags = [ state.hasPrevious ? 'enabled' : 'disabled' ]
+  buttons[NEXT].flags = [ state.hasNext ? 'enabled' : 'disabled' ]
+  update()
+}
 
-  var buttons = [
-    {
-      tooltip: isPaused ? 'Play' : 'Pause',
-      icon: path.join(config.STATIC_PATH, icon),
-      click: () => windows.main.dispatch('playPause')
-    }
-  ]
+function isEnabled () {
+  return buttons.length > 0
+}
+
+function update () {
   windows.main.win.setThumbarButtons(buttons)
 }

src/main/tray.js

@@ -4,14 +4,14 @@ module.exports = {
   setWindowFocus
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var app = electron.app
+const app = electron.app
 
-var config = require('../config')
-var windows = require('./windows')
+const config = require('../config')
+const windows = require('./windows')
 
-var tray
+let tray
 
 function init () {
   if (process.platform === 'linux') {
@@ -36,8 +36,8 @@ function setWindowFocus (flag) {
 }
 
 function initLinux () {
-  checkLinuxTraySupport(function (supportsTray) {
-    if (supportsTray) createTray()
+  checkLinuxTraySupport(function (err) {
+    if (!err) createTray()
   })
 }
 
@@ -49,16 +49,20 @@ function initWin32 () {
  * Check for libappindicator1 support before creating tray icon
  */
 function checkLinuxTraySupport (cb) {
-  var cp = require('child_process')
+  const cp = require('child_process')
 
   // Check that we're on Ubuntu (or another debian system) and that we have
   // libappindicator1. If WebTorrent was installed from the deb file, we should
   // always have it. If it was installed from the zip file, we might not.
   cp.exec('dpkg --get-selections libappindicator1', function (err, stdout) {
-    if (err) return cb(false)
+    if (err) return cb(err)
     // Unfortunately there's no cleaner way, as far as I can tell, to check
     // whether a debian package is installed:
-    cb(stdout.endsWith('\tinstall\n'))
+    if (stdout.endsWith('\tinstall\n')) {
+      cb(null)
+    } else {
+      cb(new Error('debian package not installed'))
+    }
   })
 }
 
@@ -74,7 +78,7 @@ function createTray () {
 }
 
 function updateTrayMenu () {
-  var contextMenu = electron.Menu.buildFromTemplate(getMenuTemplate())
+  const contextMenu = electron.Menu.buildFromTemplate(getMenuTemplate())
   tray.setContextMenu(contextMenu)
 }
 

src/main/updater.js

@@ -2,16 +2,17 @@ module.exports = {
   init
 }
 
-var electron = require('electron')
-var get = require('simple-get')
+const electron = require('electron')
+const get = require('simple-get')
 
-var config = require('../config')
-var log = require('./log')
-var windows = require('./windows')
+const config = require('../config')
+const log = require('./log')
+const windows = require('./windows')
 
-var AUTO_UPDATE_URL = config.AUTO_UPDATE_URL +
+const AUTO_UPDATE_URL = config.AUTO_UPDATE_URL +
   '?version=' + config.APP_VERSION +
-  '&platform=' + process.platform
+  '&platform=' + process.platform +
+  '&sysarch=' + config.OS_SYSARCH
 
 function init () {
   if (process.platform === 'linux') {

src/main/user-tasks.js

@@ -2,9 +2,9 @@ module.exports = {
   init
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var app = electron.app
+const app = electron.app
 
 /**
  * Add a user task menu to the app icon on right-click. (Windows)

src/main/windows/about.js

@@ -1,17 +1,17 @@
-var about = module.exports = {
+const about = module.exports = {
   init,
   win: null
 }
 
-var config = require('../../config')
-var electron = require('electron')
+const config = require('../../config')
+const electron = require('electron')
 
 function init () {
   if (about.win) {
     return about.win.show()
   }
 
-  var win = about.win = new electron.BrowserWindow({
+  const win = about.win = new electron.BrowserWindow({
     backgroundColor: '#ECECEC',
     center: true,
     fullscreen: false,
@@ -32,7 +32,7 @@ function init () {
   // No menu on the About window
   win.setMenu(null)
 
-  win.webContents.once('did-finish-load', function () {
+  win.once('ready-to-show', function () {
     win.show()
   })
 

src/main/windows/main.js

@@ -1,4 +1,4 @@
-var main = module.exports = {
+const main = module.exports = {
   dispatch,
   hide,
   init,
@@ -14,43 +14,59 @@ var main = module.exports = {
   win: null
 }
 
-var electron = require('electron')
+const electron = require('electron')
+const debounce = require('debounce')
 
-var app = electron.app
+const app = electron.app
 
-var config = require('../../config')
-var log = require('../log')
-var menu = require('../menu')
-var tray = require('../tray')
+const config = require('../../config')
+const log = require('../log')
+const menu = require('../menu')
 
-var HEADER_HEIGHT = 38
-var TORRENT_HEIGHT = 100
-
-function init () {
+function init (state, options) {
   if (main.win) {
     return main.win.show()
   }
-  var win = main.win = new electron.BrowserWindow({
+
+  const initialBounds = Object.assign(config.WINDOW_INITIAL_BOUNDS, state.saved.bounds)
+
+  const win = main.win = new electron.BrowserWindow({
     backgroundColor: '#282828',
+    backgroundThrottling: false, // do not throttle animations/timers when page is background
     darkTheme: true, // Forces dark theme (GTK+3)
+    height: initialBounds.height,
     icon: getIconPath(), // Window icon (Windows, Linux)
-    minWidth: config.WINDOW_MIN_WIDTH,
     minHeight: config.WINDOW_MIN_HEIGHT,
+    minWidth: config.WINDOW_MIN_WIDTH,
+    show: false,
     title: config.APP_WINDOW_TITLE,
     titleBarStyle: 'hidden-inset', // Hide title bar (Mac)
     useContentSize: true, // Specify web page size without OS chrome
-    width: 500,
-    height: HEADER_HEIGHT + (TORRENT_HEIGHT * 6) // header height + 5 torrents
+    width: initialBounds.width,
+    x: initialBounds.x,
+    y: initialBounds.y
   })
 
   win.loadURL(config.WINDOW_MAIN)
 
-  if (win.setSheetOffset) win.setSheetOffset(HEADER_HEIGHT)
+  win.once('ready-to-show', () => {
+    if (!options.hidden) win.show()
+  })
+
+  if (win.setSheetOffset) {
+    win.setSheetOffset(config.UI_HEADER_HEIGHT)
+  }
 
   win.webContents.on('dom-ready', function () {
     menu.onToggleFullScreen(main.win.isFullScreen())
   })
 
+  win.webContents.on('will-navigate', (e, url) => {
+    // Prevent drag-and-drop from navigating the Electron window, which can happen
+    // before our drag-and-drop handlers have been initialized.
+    e.preventDefault()
+  })
+
   win.on('blur', onWindowBlur)
   win.on('focus', onWindowFocus)
 
@@ -69,10 +85,23 @@ function init () {
     win.setMenuBarVisibility(true)
   })
 
+  win.on('move', debounce(function (e) {
+    send('windowBoundsChanged', e.sender.getBounds())
+  }, 1000))
+
+  win.on('resize', debounce(function (e) {
+    send('windowBoundsChanged', e.sender.getBounds())
+  }, 1000))
+
   win.on('close', function (e) {
-    if (process.platform !== 'darwin' && !tray.hasTray()) {
-      app.quit()
-    } else if (!app.isQuitting) {
+    if (process.platform !== 'darwin') {
+      const tray = require('../tray')
+      if (!tray.hasTray()) {
+        app.quit()
+        return
+      }
+    }
+    if (!app.isQuitting) {
       e.preventDefault()
       hide()
     }
@@ -85,7 +114,7 @@ function dispatch (...args) {
 
 function hide () {
   if (!main.win) return
-  main.win.send('dispatch', 'backToList')
+  dispatch('backToList')
   main.win.hide()
 }
 
@@ -114,7 +143,7 @@ function setBounds (bounds, maximize) {
   }
 
   // Maximize or minimize, if the second argument is present
-  var willBeMaximized
+  let willBeMaximized
   if (maximize === true) {
     if (!main.win.isMaximized()) {
       log('setBounds: maximizing')
@@ -136,9 +165,9 @@ function setBounds (bounds, maximize) {
     log('setBounds: setting bounds to ' + JSON.stringify(bounds))
     if (bounds.x === null && bounds.y === null) {
       // X and Y not specified? By default, center on current screen
-      var scr = electron.screen.getDisplayMatching(main.win.getBounds())
-      bounds.x = Math.round(scr.bounds.x + scr.bounds.width / 2 - bounds.width / 2)
-      bounds.y = Math.round(scr.bounds.y + scr.bounds.height / 2 - bounds.height / 2)
+      const scr = electron.screen.getDisplayMatching(main.win.getBounds())
+      bounds.x = Math.round(scr.bounds.x + (scr.bounds.width / 2) - (bounds.width / 2))
+      bounds.y = Math.round(scr.bounds.y + (scr.bounds.height / 2) - (bounds.height / 2))
       log('setBounds: centered to ' + JSON.stringify(bounds))
     }
     // Resize the window's content area (so window border doesn't need to be taken
@@ -211,12 +240,20 @@ function toggleFullScreen (flag) {
 
 function onWindowBlur () {
   menu.setWindowFocus(false)
-  tray.setWindowFocus(false)
+
+  if (process.platform !== 'darwin') {
+    const tray = require('../tray')
+    tray.setWindowFocus(false)
+  }
 }
 
 function onWindowFocus () {
   menu.setWindowFocus(true)
-  tray.setWindowFocus(true)
+
+  if (process.platform !== 'darwin') {
+    const tray = require('../tray')
+    tray.setWindowFocus(true)
+  }
 }
 
 function getIconPath () {

src/main/windows/webtorrent.js

@@ -1,4 +1,4 @@
-var webtorrent = module.exports = {
+const webtorrent = module.exports = {
   init,
   send,
   show,
@@ -6,14 +6,14 @@ var webtorrent = module.exports = {
   win: null
 }
 
-var electron = require('electron')
+const electron = require('electron')
 
-var config = require('../../config')
-var log = require('../log')
+const config = require('../../config')
 
 function init () {
-  var win = webtorrent.win = new electron.BrowserWindow({
+  const win = webtorrent.win = new electron.BrowserWindow({
     backgroundColor: '#1E1E1E',
+    backgroundThrottling: false, // do not throttle animations/timers when page is background
     center: true,
     fullscreen: false,
     fullscreenable: false,
@@ -52,7 +52,6 @@ function send (...args) {
 
 function toggleDevTools () {
   if (!webtorrent.win) return
-  log('toggleDevTools')
   if (webtorrent.win.webContents.isDevToolsOpened()) {
     webtorrent.win.webContents.closeDevTools()
     webtorrent.win.hide()

src/renderer/components/header.js

@@ -4,9 +4,12 @@ const {dispatcher} = require('../lib/dispatcher')
 
 class Header extends React.Component {
   render () {
-    var loc = this.props.state.location
+    const loc = this.props.state.location
     return (
-      <div className='header'>
+      <div className='header'
+        onMouseMove={dispatcher('mediaMouseMoved')}
+        onMouseEnter={dispatcher('mediaControlsMouseEnter')}
+        onMouseLeave={dispatcher('mediaControlsMouseLeave')}>
         {this.getTitle()}
         <div className='nav left float-left'>
           <i
@@ -31,12 +34,12 @@ class Header extends React.Component {
 
   getTitle () {
     if (process.platform !== 'darwin') return null
-    var state = this.props.state
+    const state = this.props.state
     return (<div className='title ellipsis'>{state.window.title}</div>)
   }
 
   getAddButton () {
-    var state = this.props.state
+    const state = this.props.state
     if (state.location.url() !== 'home') return null
     return (
       <i

src/renderer/components/heading.js

@@ -17,15 +17,14 @@ class Heading extends React.Component {
 
   render () {
     const HeadingTag = 'h' + this.props.level
+    const style = {
+      color: colors.grey100,
+      fontSize: 20,
+      marginBottom: 15,
+      marginTop: 30
+    }
     return (
-      <HeadingTag
-        style={{
-          color: colors.grey100,
-          fontSize: 20,
-          marginBottom: 15,
-          marginTop: 30
-        }}
-      >
+      <HeadingTag style={style}>
         {this.props.children}
       </HeadingTag>
     )

src/renderer/components/modal-ok-cancel.js

@@ -0,0 +1,25 @@
+const React = require('react')
+const FlatButton = require('material-ui/FlatButton').default
+const RaisedButton = require('material-ui/RaisedButton').default
+
+module.exports = class ModalOKCancel extends React.Component {
+  render () {
+    const cancelStyle = { marginRight: 10, color: 'black' }
+    const {cancelText, onCancel, okText, onOK} = this.props
+    return (
+      <div className='float-right'>
+        <FlatButton
+          className='control cancel'
+          style={cancelStyle}
+          label={cancelText}
+          onClick={onCancel} />
+        <RaisedButton
+          className='control ok'
+          primary
+          label={okText}
+          onClick={onOK}
+          autoFocus />
+      </div>
+    )
+  }
+}

src/renderer/components/open-torrent-address-modal.js

@@ -1,32 +1,41 @@
 const React = require('react')
+const TextField = require('material-ui/TextField').default
 
+const ModalOKCancel = require('./modal-ok-cancel')
 const {dispatch, dispatcher} = require('../lib/dispatcher')
 
 module.exports = class OpenTorrentAddressModal extends React.Component {
   render () {
-    // TODO: dcposch remove janky inline <script>
     return (
       <div className='open-torrent-address-modal'>
         <p><label>Enter torrent address or magnet link</label></p>
-        <p>
-          <input id='add-torrent-url' type='text' onKeyPress={handleKeyPress} />
-        </p>
-        <p className='float-right'>
-          <button className='button button-flat' onClick={dispatcher('exitModal')}>Cancel</button>
-          <button className='button button-raised' onClick={handleOK}>OK</button>
-        </p>
-        <script>document.querySelector('#add-torrent-url').focus()</script>
+        <div>
+          <TextField
+            id='torrent-address-field'
+            className='control'
+            ref={(c) => { this.torrentURL = c }}
+            fullWidth
+            onKeyDown={handleKeyDown.bind(this)} />
+        </div>
+        <ModalOKCancel
+          cancelText='CANCEL'
+          onCancel={dispatcher('exitModal')}
+          okText='OK'
+          onOK={handleOK.bind(this)} />
       </div>
     )
   }
+
+  componentDidMount () {
+    this.torrentURL.input.focus()
+  }
 }
 
-function handleKeyPress (e) {
-  if (e.which === 13) handleOK() /* hit Enter to submit */
+function handleKeyDown (e) {
+  if (e.which === 13) handleOK.call(this) /* hit Enter to submit */
 }
 
 function handleOK () {
   dispatch('exitModal')
-  // TODO: dcposch use React refs instead
-  dispatch('addTorrent', document.querySelector('#add-torrent-url').value)
+  dispatch('addTorrent', this.torrentURL.input.value)
 }

src/renderer/components/path-selector.js

@@ -7,6 +7,9 @@ const remote = electron.remote
 const RaisedButton = require('material-ui/RaisedButton').default
 const TextField = require('material-ui/TextField').default
 
+// Lets you pick a file or directory.
+// Uses the system Open File dialog.
+// You can't edit the text field directly.
 class PathSelector extends React.Component {
   static get propTypes () {
     return {
@@ -26,7 +29,7 @@ class PathSelector extends React.Component {
   }
 
   handleClick () {
-    var opts = Object.assign({
+    const opts = Object.assign({
       defaultPath: this.props.value,
       properties: [ 'openFile', 'openDirectory' ]
     }, this.props.dialog)
@@ -43,48 +46,38 @@ class PathSelector extends React.Component {
 
   render () {
     const id = this.props.title.replace(' ', '-').toLowerCase()
+    const wrapperStyle = {
+      alignItems: 'center',
+      display: 'flex',
+      width: '100%'
+    }
+    const labelStyle = {
+      flex: '0 auto',
+      marginRight: 10,
+      overflow: 'hidden',
+      textOverflow: 'ellipsis',
+      whiteSpace: 'nowrap'
+    }
+    const textareaStyle = {
+      color: colors.grey50
+    }
+    const textFieldStyle = {
+      flex: '1'
+    }
+    const text = this.props.displayValue || this.props.value
+    const buttonStyle = {
+      marginLeft: 10
+    }
+
     return (
-      <div
-        className={this.props.className}
-        style={{
-          alignItems: 'center',
-          display: 'flex',
-          width: '100%'
-        }}
-      >
-        <div
-          className='label'
-          style={{
-            flex: '0 auto',
-            marginRight: 10,
-            overflow: 'hidden',
-            textOverflow: 'ellipsis',
-            whiteSpace: 'nowrap'
-          }}
-        >
+      <div className={this.props.className} style={wrapperStyle}>
+        <div className='label' style={labelStyle}>
           {this.props.title}:
         </div>
-        <TextField
-          className='control'
-          disabled
-          id={id}
-          inputStyle={{
-            color: colors.grey50
-          }}
-          style={{
-            flex: '1',
-            fontSize: 14
-          }}
-          value={this.props.displayValue || this.props.value}
-        />
-        <RaisedButton
-          className='control'
-          label='Change'
-          onClick={this.handleClick}
-          style={{
-            marginLeft: 10
-          }}
-        />
+        <TextField className='control' disabled id={id} value={text}
+          inputStyle={textareaStyle} style={textFieldStyle} />
+        <RaisedButton className='control' label='Change' onClick={this.handleClick}
+          style={buttonStyle} />
       </div>
     )
   }

src/renderer/components/remove-torrent-modal.js

@@ -1,22 +1,24 @@
 const React = require('react')
 
+const ModalOKCancel = require('./modal-ok-cancel')
 const {dispatch, dispatcher} = require('../lib/dispatcher')
 
 module.exports = class RemoveTorrentModal extends React.Component {
   render () {
-    var state = this.props.state
-    var message = state.modal.deleteData
+    const state = this.props.state
+    const message = state.modal.deleteData
       ? 'Are you sure you want to remove this torrent from the list and delete the data file?'
       : 'Are you sure you want to remove this torrent from the list?'
-    var buttonText = state.modal.deleteData ? 'Remove Data' : 'Remove'
+    const buttonText = state.modal.deleteData ? 'REMOVE DATA' : 'REMOVE'
 
     return (
       <div>
         <p><strong>{message}</strong></p>
-        <p className='float-right'>
-          <button className='button button-flat' onClick={dispatcher('exitModal')}>Cancel</button>
-          <button className='button button-raised' onClick={handleRemove}>{buttonText}</button>
-        </p>
+        <ModalOKCancel
+          cancelText='CANCEL'
+          onCancel={dispatcher('exitModal')}
+          okText={buttonText}
+          onOK={handleRemove} />
       </div>
     )
 

src/renderer/components/show-more.js

@@ -1,6 +1,6 @@
 const React = require('react')
 
-const FlatButton = require('material-ui/FlatButton').default
+const RaisedButton = require('material-ui/RaisedButton').default
 
 class ShowMore extends React.Component {
   static get propTypes () {
@@ -39,14 +39,12 @@ class ShowMore extends React.Component {
       ? this.props.hideLabel
       : this.props.showLabel
     return (
-      <div
-        style={this.props.style}
-      >
+      <div className='show-more' style={this.props.style}>
         {this.state.expanded ? this.props.children : null}
-        <FlatButton
+        <RaisedButton
+          className='control'
           onClick={this.handleClick}
-          label={label}
-        />
+          label={label} />
       </div>
     )
   }

src/renderer/components/unsupported-media-modal.js

@@ -1,35 +1,35 @@
 const React = require('react')
 const electron = require('electron')
-const path = require('path')
 
+const ModalOKCancel = require('./modal-ok-cancel')
 const {dispatcher} = require('../lib/dispatcher')
 
 module.exports = class UnsupportedMediaModal extends React.Component {
   render () {
-    var state = this.props.state
-    var err = state.modal.error
-    var message = (err && err.getMessage)
+    const state = this.props.state
+    const err = state.modal.error
+    const message = (err && err.getMessage)
       ? err.getMessage()
       : err
-    var playerPath = state.saved.prefs.externalPlayerPath
-    var playerName = playerPath
-      ? path.basename(playerPath).split('.')[0]
-      : 'VLC'
-    var actionButton = state.modal.externalPlayerInstalled
-      ? (<button className='button-raised' onClick={dispatcher('openExternalPlayer')}>Play in {playerName}</button>)
-      : (<button className='button-raised' onClick={() => this.onInstall}>Install VLC</button>)
-    var playerMessage = state.modal.externalPlayerNotFound
+    const onAction = state.modal.externalPlayerInstalled
+      ? dispatcher('openExternalPlayer')
+      : () => this.onInstall()
+    const actionText = state.modal.externalPlayerInstalled
+      ? 'PLAY IN ' + state.getExternalPlayerName().toUpperCase()
+      : 'INSTALL VLC'
+    const errorMessage = state.modal.externalPlayerNotFound
       ? 'Couldn\'t run external player. Please make sure it\'s installed.'
       : ''
     return (
       <div>
         <p><strong>Sorry, we can't play that file.</strong></p>
         <p>{message}</p>
-        <p className='float-right'>
-          <button className='button-flat' onClick={dispatcher('backToList')}>Cancel</button>
-          {actionButton}
-        </p>
-        <p className='error-text'>{playerMessage}</p>
+        <ModalOKCancel
+          cancelText='CANCEL'
+          onCancel={dispatcher('backToList')}
+          okText={actionText}
+          onOK={onAction} />
+        <p className='error-text'>{errorMessage}</p>
       </div>
     )
   }
@@ -38,7 +38,7 @@ module.exports = class UnsupportedMediaModal extends React.Component {
     electron.shell.openExternal('http://www.videolan.org/vlc/')
 
     // TODO: dcposch send a dispatch rather than modifying state directly
-    var state = this.props.state
+    const state = this.props.state
     state.modal.externalPlayerInstalled = true // Assume they'll install it successfully
   }
 }

src/renderer/components/update-available-modal.js

@@ -1,19 +1,24 @@
 const React = require('react')
 const electron = require('electron')
 
+const ModalOKCancel = require('./modal-ok-cancel')
 const {dispatch} = require('../lib/dispatcher')
 
 module.exports = class UpdateAvailableModal extends React.Component {
   render () {
-    var state = this.props.state
+    const state = this.props.state
     return (
       <div className='update-available-modal'>
         <p><strong>A new version of WebTorrent is available: v{state.modal.version}</strong></p>
-        <p>We have an auto-updater for Windows and Mac. We don't have one for Linux yet, so you'll have to download the new version manually.</p>
-        <p className='float-right'>
-          <button className='button button-flat' onClick={handleSkip}>Skip This Release</button>
-          <button className='button button-raised' onClick={handleShow}>Show Download Page</button>
+        <p>
+          We have an auto-updater for Windows and Mac.
+          We don't have one for Linux yet, so you'll have to download the new version manually.
         </p>
+        <ModalOKCancel
+          cancelText='SKIP THIS RELEASE'
+          onCancel={handleSkip}
+          okText='SHOW DOWNLOAD PAGE'
+          onOK={handleShow} />
       </div>
     )
 

src/renderer/controllers/media-controller.js

@@ -1,6 +1,6 @@
-const electron = require('electron')
-
-const ipcRenderer = electron.ipcRenderer
+const {ipcRenderer} = require('electron')
+const telemetry = require('../lib/telemetry')
+const Playlist = require('../lib/playlist')
 
 // Controls local play back: the <video>/<audio> tag and VLC
 // Does not control remote casting (Chromecast etc)
@@ -10,7 +10,7 @@ module.exports = class MediaController {
   }
 
   mediaSuccess () {
-    this.state.playing.result = 'success'
+    telemetry.logPlayAttempt('success')
   }
 
   mediaStalled () {
@@ -18,9 +18,9 @@ module.exports = class MediaController {
   }
 
   mediaError (error) {
-    var state = this.state
+    const state = this.state
     if (state.location.url() === 'player') {
-      state.playing.result = 'error'
+      telemetry.logPlayAttempt('error')
       state.playing.location = 'error'
       ipcRenderer.send('checkForExternalPlayer', state.saved.prefs.externalPlayerPath)
       ipcRenderer.once('checkForExternalPlayer', function (e, isInstalled) {
@@ -42,14 +42,37 @@ module.exports = class MediaController {
     this.state.playing.mouseStationarySince = new Date().getTime()
   }
 
+  controlsMouseEnter () {
+    this.state.playing.mouseInControls = true
+    this.state.playing.mouseStationarySince = new Date().getTime()
+  }
+
+  controlsMouseLeave () {
+    this.state.playing.mouseInControls = false
+    this.state.playing.mouseStationarySince = new Date().getTime()
+  }
+
   openExternalPlayer () {
-    var state = this.state
-    ipcRenderer.send('openExternalPlayer', state.saved.prefs.externalPlayerPath, state.server.localURL, state.window.title)
+    const state = this.state
     state.playing.location = 'external'
+
+    const onServerRunning = function () {
+      state.playing.isReady = true
+      telemetry.logPlayAttempt('external')
+
+      const mediaURL = Playlist.getCurrentLocalURL(state)
+      ipcRenderer.send('openExternalPlayer',
+        state.saved.prefs.externalPlayerPath,
+        mediaURL,
+        state.window.title)
+    }
+
+    if (state.server != null) onServerRunning()
+    else ipcRenderer.once('wt-server-running', onServerRunning)
   }
 
   externalPlayerNotFound () {
-    var modal = this.state.modal
+    const modal = this.state.modal
     if (modal && modal.id === 'unsupported-media-modal') {
       modal.externalPlayerNotFound = true
     }

src/renderer/controllers/playback-controller.js

@@ -4,10 +4,11 @@ const path = require('path')
 const Cast = require('../lib/cast')
 const {dispatch} = require('../lib/dispatcher')
 const telemetry = require('../lib/telemetry')
-const errors = require('../lib/errors')
+const {UnplayableFileError, UnplayableTorrentError} = require('../lib/errors')
 const sound = require('../lib/sound')
 const TorrentPlayer = require('../lib/torrent-player')
 const TorrentSummary = require('../lib/torrent-summary')
+const Playlist = require('../lib/playlist')
 const State = require('../lib/state')
 
 const ipcRenderer = electron.ipcRenderer
@@ -24,41 +25,45 @@ module.exports = class PlaybackController {
   // Play a file in a torrent.
   // * Start torrenting, if necessary
   // * Stream, if not already fully downloaded
-  // * If no file index is provided, pick the default file to play
+  // * If no file index is provided, restore the most recently viewed file or autoplay the first
   playFile (infoHash, index /* optional */) {
     this.pauseActiveTorrents(infoHash)
 
-    this.state.location.go({
-      url: 'player',
-      setup: (cb) => {
-        this.play()
-        this.openPlayer(infoHash, index, cb)
-      },
-      destroy: () => this.closePlayer()
-    }, (err) => {
-      if (err) dispatch('error', err)
-    })
-  }
+    const state = this.state
+    if (state.location.url() === 'player') {
+      this.updatePlayer(infoHash, index, false, (err) => {
+        if (err) dispatch('error', err)
+        else this.play()
+      })
+    } else {
+      let initialized = false
+      state.location.go({
+        url: 'player',
+        setup: (cb) => {
+          const torrentSummary = TorrentSummary.getByKey(state, infoHash)
 
-  pauseActiveTorrents (infoHash) {
-    // playback priority: pause all active torrents if needed
-    if (this.state.saved.prefs.highestPlaybackPriority) {
-      // do not pause active torrents if playing a fully downloaded torrent
-      var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
-      if (torrentSummary.status === 'seeding') return
+          if (index === undefined || initialized) index = torrentSummary.mostRecentFileIndex
+          if (index === undefined) index = torrentSummary.files.findIndex(TorrentPlayer.isPlayable)
+          if (index === undefined) return cb(new UnplayableTorrentError())
 
-      var params = {
-        filter: {status: /downloading|seeding/},
-        excluded: [infoHash]
-      }
-      dispatch('pauseAllTorrents', params)
+          initialized = true
+
+          this.openPlayer(infoHash, index, (err) => {
+            if (!err) this.play()
+            cb(err)
+          })
+        },
+        destroy: () => this.closePlayer()
+      }, (err) => {
+        if (err) dispatch('error', err)
+      })
     }
   }
 
   // Open a file in OS default app.
   openItem (infoHash, index) {
-    var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
-    var filePath = path.join(
+    const torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
+    const filePath = path.join(
       torrentSummary.path,
       torrentSummary.files[index].path)
     ipcRenderer.send('openItem', filePath)
@@ -66,12 +71,12 @@ module.exports = class PlaybackController {
 
   // Toggle (play or pause) the currently playing media
   playPause () {
-    var state = this.state
+    const state = this.state
     if (state.location.url() !== 'player') return
 
     // force rerendering if window is hidden,
     // in order to bypass `raf` and play/pause media immediately
-    var mediaTag = document.querySelector('video,audio')
+    const mediaTag = document.querySelector('video,audio')
     if (!state.window.isVisible && mediaTag) {
       if (state.playing.isPaused) mediaTag.play()
       else mediaTag.pause()
@@ -81,9 +86,44 @@ module.exports = class PlaybackController {
     else this.pause()
   }
 
+  pauseActiveTorrents (infoHash) {
+    // Playback Priority: pause all active torrents if needed.
+    if (this.state.saved.prefs.highestPlaybackPriority) {
+      // Do not pause active torrents if playing a fully downloaded torrent.
+      var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
+      if (torrentSummary.status === 'seeding') return
+
+      dispatch('prioritizeTorrent', infoHash)
+    }
+  }
+
+  // Play next file in list (if any)
+  nextTrack () {
+    const state = this.state
+    if (Playlist.hasNext(state) && state.playing.location !== 'external') {
+      this.updatePlayer(
+          state.playing.infoHash, Playlist.getNextIndex(state), false, (err) => {
+            if (err) dispatch('error', err)
+            else this.play()
+          })
+    }
+  }
+
+  // Play previous track in list (if any)
+  previousTrack () {
+    const state = this.state
+    if (Playlist.hasPrevious(state) && state.playing.location !== 'external') {
+      this.updatePlayer(
+        state.playing.infoHash, Playlist.getPreviousIndex(state), false, (err) => {
+          if (err) dispatch('error', err)
+          else this.play()
+        })
+    }
+  }
+
   // Play (unpause) the current media
   play () {
-    var state = this.state
+    const state = this.state
     if (!state.playing.isPaused) return
     state.playing.isPaused = false
     if (isCasting(state)) {
@@ -94,7 +134,7 @@ module.exports = class PlaybackController {
 
   // Pause the currently playing media
   pause () {
-    var state = this.state
+    const state = this.state
     if (state.playing.isPaused) return
     state.playing.isPaused = true
     if (isCasting(state)) {
@@ -123,25 +163,23 @@ module.exports = class PlaybackController {
   // to 0.25 (quarter-speed playback), then goes to -0.25, -0.5, -1, -2, etc
   // until -16 (fast rewind)
   changePlaybackRate (direction) {
-    var state = this.state
-    var rate = state.playing.playbackRate
-    if (direction > 0 && rate >= 0.25 && rate < 2) {
+    const state = this.state
+    let rate = state.playing.playbackRate
+    if (direction > 0 && rate < 2) {
       rate += 0.25
     } else if (direction < 0 && rate > 0.25 && rate <= 2) {
       rate -= 0.25
-    } else if (direction < 0 && rate === 0.25) { /* when we set playback rate at 0 in html 5, playback hangs ;( */
-      rate = -1
-    } else if (direction > 0 && rate === -1) {
-      rate = 0.25
-    } else if ((direction > 0 && rate >= 1 && rate < 16) || (direction < 0 && rate > -16 && rate <= -1)) {
+    } else if (direction > 0 && rate >= 1 && rate < 16) {
       rate *= 2
-    } else if ((direction < 0 && rate > 1 && rate <= 16) || (direction > 0 && rate >= -16 && rate < -1)) {
+    } else if (direction < 0 && rate > 1 && rate <= 16) {
       rate /= 2
     }
     state.playing.playbackRate = rate
     if (isCasting(state) && !Cast.setRate(rate)) {
       state.playing.playbackRate = 1
     }
+    // Wait a bit before we hide the controls and header again
+    state.playing.mouseStationarySince = new Date().getTime()
   }
 
   // Change the volume, in range [0, 1], by some amount
@@ -156,7 +194,7 @@ module.exports = class PlaybackController {
     // check if its in [0.0 - 1.0] range
     volume = Math.max(0, Math.min(1, volume))
 
-    var state = this.state
+    const state = this.state
     if (isCasting(state)) {
       Cast.setVolume(volume)
     } else {
@@ -170,12 +208,8 @@ module.exports = class PlaybackController {
   // * The video is paused
   // * The video is playing remotely on Chromecast or Airplay
   showOrHidePlayerControls () {
-    var state = this.state
-    var hideControls = state.location.url() === 'player' &&
-      state.playing.mouseStationarySince !== 0 &&
-      new Date().getTime() - state.playing.mouseStationarySince > 2000 &&
-      !state.playing.isPaused &&
-      state.playing.location === 'local'
+    const state = this.state
+    const hideControls = state.shouldHidePlayerControls()
 
     if (hideControls !== state.playing.hideControls) {
       state.playing.hideControls = hideControls
@@ -186,60 +220,81 @@ module.exports = class PlaybackController {
 
   // Opens the video player to a specific torrent
   openPlayer (infoHash, index, cb) {
-    var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
+    const state = this.state
+    const torrentSummary = TorrentSummary.getByKey(state, infoHash)
 
-    // automatically choose which file in the torrent to play, if necessary
-    if (index === undefined) index = torrentSummary.defaultPlayFileIndex
-    if (index === undefined) index = TorrentPlayer.pickFileToPlay(torrentSummary.files)
-    if (index === undefined) return cb(new errors.UnplayableError())
+    state.playing.infoHash = torrentSummary.infoHash
+    state.playing.isReady = false
 
     // update UI to show pending playback
-    if (torrentSummary.progress !== 1) sound.play('PLAY')
-    // TODO: remove torrentSummary.playStatus
-    torrentSummary.playStatus = 'requested'
-    this.update()
+    sound.play('PLAY')
 
-    var timeout = setTimeout(() => {
-      telemetry.logPlayAttempt('timeout')
-      // TODO: remove torrentSummary.playStatus
-      torrentSummary.playStatus = 'timeout' /* no seeders available? */
-      sound.play('ERROR')
-      cb(new Error('Playback timed out. Try again.'))
-      this.update()
-    }, 10000) /* give it a few seconds */
+    this.startServer(torrentSummary)
+    ipcRenderer.send('onPlayerOpen')
+    this.updatePlayer(infoHash, index, true, cb)
+  }
+
+  // Starts WebTorrent server for media streaming
+  startServer (torrentSummary) {
+    const state = this.state
 
     if (torrentSummary.status === 'paused') {
       dispatch('startTorrentingSummary', torrentSummary.torrentKey)
       ipcRenderer.once('wt-ready-' + torrentSummary.infoHash,
-        () => this.openPlayerFromActiveTorrent(torrentSummary, index, timeout, cb))
+        () => onTorrentReady())
     } else {
-      this.openPlayerFromActiveTorrent(torrentSummary, index, timeout, cb)
+      onTorrentReady()
+    }
+
+    function onTorrentReady () {
+      ipcRenderer.send('wt-start-server', torrentSummary.infoHash)
+      ipcRenderer.once('wt-server-running', () => { state.playing.isReady = true })
     }
   }
 
-  openPlayerFromActiveTorrent (torrentSummary, index, timeout, cb) {
-    var fileSummary = torrentSummary.files[index]
+  // Called each time the current file changes
+  updatePlayer (infoHash, index, resume, cb) {
+    const state = this.state
+
+    const torrentSummary = TorrentSummary.getByKey(state, infoHash)
+    const fileSummary = torrentSummary.files[index]
+
+    if (!TorrentPlayer.isPlayable(fileSummary)) {
+      torrentSummary.mostRecentFileIndex = undefined
+      return cb(new UnplayableFileError())
+    }
+
+    torrentSummary.mostRecentFileIndex = index
 
     // update state
-    var state = this.state
-    state.playing.infoHash = torrentSummary.infoHash
+    state.playing.infoHash = infoHash
     state.playing.fileIndex = index
     state.playing.type = TorrentPlayer.isVideo(fileSummary) ? 'video'
       : TorrentPlayer.isAudio(fileSummary) ? 'audio'
       : 'other'
 
     // pick up where we left off
-    if (fileSummary.currentTime) {
-      var fraction = fileSummary.currentTime / fileSummary.duration
-      var secondsLeft = fileSummary.duration - fileSummary.currentTime
+    let jumpToTime = 0
+    if (resume && fileSummary.currentTime) {
+      const fraction = fileSummary.currentTime / fileSummary.duration
+      const secondsLeft = fileSummary.duration - fileSummary.currentTime
       if (fraction < 0.9 && secondsLeft > 10) {
-        state.playing.jumpToTime = fileSummary.currentTime
+        jumpToTime = fileSummary.currentTime
       }
     }
+    state.playing.jumpToTime = jumpToTime
 
     // if it's audio, parse out the metadata (artist, title, etc)
-    if (state.playing.type === 'audio' && !fileSummary.audioInfo) {
-      ipcRenderer.send('wt-get-audio-metadata', torrentSummary.infoHash, index)
+    if (torrentSummary.status === 'paused') {
+      ipcRenderer.once('wt-ready-' + torrentSummary.infoHash, getAudioMetadata)
+    } else {
+      getAudioMetadata()
+    }
+
+    function getAudioMetadata () {
+      if (state.playing.type === 'audio' && !fileSummary.audioInfo) {
+        ipcRenderer.send('wt-get-audio-metadata', torrentSummary.infoHash, index)
+      }
     }
 
     // if it's video, check for subtitles files that are done downloading
@@ -250,41 +305,28 @@ module.exports = class PlaybackController {
       dispatch('addSubtitles', [fileSummary.selectedSubtitle], true)
     }
 
-    ipcRenderer.send('wt-start-server', torrentSummary.infoHash, index)
-    ipcRenderer.once('wt-server-' + torrentSummary.infoHash, (e, info) => {
-      clearTimeout(timeout)
+    state.window.title = fileSummary.name
 
-      // if we timed out (user clicked play a long time ago), don't autoplay
-      var timedOut = torrentSummary.playStatus === 'timeout'
-      delete torrentSummary.playStatus
-      if (timedOut) {
-        ipcRenderer.send('wt-stop-server')
-        return this.update()
-      }
-
-      state.window.title = torrentSummary.files[state.playing.fileIndex].name
-
-      // play in VLC if set as default player (Preferences / Playback / Play in VLC)
-      if (this.state.saved.prefs.openExternalPlayer) {
-        dispatch('openExternalPlayer')
-        this.update()
-        cb()
-        return
-      }
-
-      // otherwise, play the video
+    // play in VLC if set as default player (Preferences / Playback / Play in VLC)
+    if (this.state.saved.prefs.openExternalPlayer) {
+      dispatch('openExternalPlayer')
       this.update()
-
-      ipcRenderer.send('onPlayerOpen')
       cb()
-    })
+      return
+    }
+
+    // otherwise, play the video
+    this.update()
+
+    ipcRenderer.send('onPlayerUpdate', Playlist.hasNext(state), Playlist.hasPrevious(state))
+    cb()
   }
 
   closePlayer () {
     console.log('closePlayer')
 
     // Quit any external players, like Chromecast/Airplay/etc or VLC
-    var state = this.state
+    const state = this.state
     if (isCasting(state)) {
       Cast.stop()
     }
@@ -295,12 +337,7 @@ module.exports = class PlaybackController {
     // Save volume (this session only, not in state.saved)
     state.previousVolume = state.playing.volume
 
-    // Telemetry: track what happens after the user clicks play
-    var result = state.playing.result // 'success' or 'error'
-    if (result === 'success') telemetry.logPlayAttempt('success') // first frame displayed
-    else if (result === 'error') telemetry.logPlayAttempt('error') // codec missing, etc
-    else if (result === undefined) telemetry.logPlayAttempt('abandoned') // user exited before first frame
-    else console.error('Unknown state.playing.result', state.playing.result)
+    if (!state.playing.isReady) telemetry.logPlayAttempt('abandoned') // user gave up waiting
 
     // Reset the window contents back to the home screen
     state.playing = State.getDefaultPlayState()
@@ -317,7 +354,7 @@ module.exports = class PlaybackController {
 
     ipcRenderer.send('onPlayerClose')
 
-    // playback priority: resume previously paused downloads
+    // Playback Priority: resume previously paused downloads.
     if (this.state.saved.prefs.highestPlaybackPriority) {
       dispatch('resumePausedTorrents')
     }

src/renderer/controllers/prefs-controller.js

@@ -1,4 +1,3 @@
-const State = require('../lib/state')
 const {dispatch} = require('../lib/dispatcher')
 const ipcRenderer = require('electron').ipcRenderer
 
@@ -11,13 +10,15 @@ module.exports = class PrefsController {
 
   // Goes to the Preferences screen
   show () {
-    var state = this.state
+    const state = this.state
     state.location.go({
       url: 'preferences',
       setup: function (cb) {
         // initialize preferences
         state.window.title = 'Preferences'
-        state.unsaved = Object.assign(state.unsaved || {}, {prefs: state.saved.prefs || {}})
+        state.unsaved = Object.assign(state.unsaved || {}, {
+          prefs: Object.assign({}, state.saved.prefs)
+        })
         ipcRenderer.send('setAllowNav', false)
         cb()
       },
@@ -32,25 +33,29 @@ module.exports = class PrefsController {
   // For example: updatePreferences('foo.bar', 'baz')
   // Call save() to save to config.json
   update (property, value) {
-    var path = property.split('.')
-    var key = this.state.unsaved.prefs
-    for (var i = 0; i < path.length - 1; i++) {
-      if (typeof key[path[i]] === 'undefined') {
-        key[path[i]] = {}
+    const path = property.split('.')
+    let obj = this.state.unsaved.prefs
+    let i
+    for (i = 0; i < path.length - 1; i++) {
+      if (typeof obj[path[i]] === 'undefined') {
+        obj[path[i]] = {}
       }
-      key = key[path[i]]
+      obj = obj[path[i]]
     }
-    key[path[i]] = value
+    obj[path[i]] = value
   }
 
   // All unsaved prefs take effect atomically, and are saved to config.json
   save () {
-    var state = this.state
+    const state = this.state
     if (state.unsaved.prefs.isFileHandler !== state.saved.prefs.isFileHandler) {
       ipcRenderer.send('setDefaultFileHandler', state.unsaved.prefs.isFileHandler)
     }
+    if (state.unsaved.prefs.startup !== state.saved.prefs.startup) {
+      ipcRenderer.send('setStartup', state.unsaved.prefs.startup)
+    }
     state.saved.prefs = Object.assign(state.saved.prefs || {}, state.unsaved.prefs)
-    State.save(state)
+    dispatch('stateSaveImmediate')
     dispatch('checkDownloadPath')
   }
 }

src/renderer/controllers/subtitles-controller.js

@@ -1,5 +1,5 @@
 const electron = require('electron')
-const fs = require('fs-extra')
+const fs = require('fs')
 const path = require('path')
 const parallel = require('run-parallel')
 
@@ -28,36 +28,35 @@ module.exports = class SubtitlesController {
   }
 
   toggleSubtitlesMenu () {
-    var subtitles = this.state.playing.subtitles
+    const subtitles = this.state.playing.subtitles
     subtitles.showMenu = !subtitles.showMenu
   }
 
   addSubtitles (files, autoSelect) {
-    var state = this.state
     // Subtitles are only supported when playing video files
-    if (state.playing.type !== 'video') return
+    if (this.state.playing.type !== 'video') return
     if (files.length === 0) return
-    var subtitles = state.playing.subtitles
+    const subtitles = this.state.playing.subtitles
 
     // Read the files concurrently, then add all resulting subtitle tracks
-    var tasks = files.map((file) => (cb) => loadSubtitle(file, cb))
+    const tasks = files.map((file) => (cb) => loadSubtitle(file, cb))
     parallel(tasks, function (err, tracks) {
       if (err) return dispatch('error', err)
 
-      for (var i = 0; i < tracks.length; i++) {
+      for (let i = 0; i < tracks.length; i++) {
         // No dupes allowed
-        var track = tracks[i]
-        var trackIndex = state.playing.subtitles.tracks
-          .findIndex((t) => track.filePath === t.filePath)
+        const track = tracks[i]
+        let trackIndex = subtitles.tracks.findIndex((t) =>
+          track.filePath === t.filePath)
 
         // Add the track
         if (trackIndex === -1) {
-          trackIndex = state.playing.subtitles.tracks.push(track) - 1
+          trackIndex = subtitles.tracks.push(track) - 1
         }
 
         // If we're auto-selecting a track, try to find one in the user's language
         if (autoSelect && (i === 0 || isSystemLanguage(track.language))) {
-          state.playing.subtitles.selectedIndex = trackIndex
+          subtitles.selectedIndex = trackIndex
         }
       }
 
@@ -68,46 +67,46 @@ module.exports = class SubtitlesController {
 
   checkForSubtitles () {
     if (this.state.playing.type !== 'video') return
-    var torrentSummary = this.state.getPlayingTorrentSummary()
+    const torrentSummary = this.state.getPlayingTorrentSummary()
     if (!torrentSummary || !torrentSummary.progress) return
 
     torrentSummary.progress.files.forEach((fp, ix) => {
       if (fp.numPieces !== fp.numPiecesPresent) return // ignore incomplete files
-      var file = torrentSummary.files[ix]
+      const file = torrentSummary.files[ix]
       if (!this.isSubtitle(file.name)) return
-      var filePath = path.join(torrentSummary.path, file.path)
+      const filePath = path.join(torrentSummary.path, file.path)
       this.addSubtitles([filePath], false)
     })
   }
 
   isSubtitle (file) {
-    var name = typeof file === 'string' ? file : file.name
-    var ext = path.extname(name).toLowerCase()
+    const name = typeof file === 'string' ? file : file.name
+    const ext = path.extname(name).toLowerCase()
     return ext === '.srt' || ext === '.vtt'
   }
 }
 
 function loadSubtitle (file, cb) {
   // Lazy load to keep startup fast
-  var concat = require('simple-concat')
-  var LanguageDetect = require('languagedetect')
-  var srtToVtt = require('srt-to-vtt')
+  const concat = require('simple-concat')
+  const LanguageDetect = require('languagedetect')
+  const srtToVtt = require('srt-to-vtt')
 
   // Read the .SRT or .VTT file, parse it, add subtitle track
-  var filePath = file.path || file
+  const filePath = file.path || file
 
-  var vttStream = fs.createReadStream(filePath).pipe(srtToVtt())
+  const vttStream = fs.createReadStream(filePath).pipe(srtToVtt())
 
   concat(vttStream, function (err, buf) {
     if (err) return dispatch('error', 'Can\'t parse subtitles file.')
 
     // Detect what language the subtitles are in
-    var vttContents = buf.toString().replace(/(.*-->.*)/g, '')
-    var langDetected = (new LanguageDetect()).detect(vttContents, 2)
+    const vttContents = buf.toString().replace(/(.*-->.*)/g, '')
+    let langDetected = (new LanguageDetect()).detect(vttContents, 2)
     langDetected = langDetected.length ? langDetected[0][0] : 'subtitle'
     langDetected = langDetected.slice(0, 1).toUpperCase() + langDetected.slice(1)
 
-    var track = {
+    const track = {
       buffer: 'data:text/vtt;base64,' + buf.toString('base64'),
       language: langDetected,
       label: langDetected,
@@ -121,18 +120,18 @@ function loadSubtitle (file, cb) {
 // Checks whether a language name like 'English' or 'German' matches the system
 // language, aka the current locale
 function isSystemLanguage (language) {
-  var iso639 = require('iso-639-1')
-  var osLangISO = window.navigator.language.split('-')[0] // eg 'en'
-  var langIso = iso639.getCode(language) // eg 'de' if language is 'German'
+  const iso639 = require('iso-639-1')
+  const osLangISO = window.navigator.language.split('-')[0] // eg 'en'
+  const langIso = iso639.getCode(language) // eg 'de' if language is 'German'
   return langIso === osLangISO
 }
 
 // Make sure we don't have two subtitle tracks with the same label
 // Labels each track by language, eg 'German', 'English', 'English 2', ...
 function relabelSubtitles (subtitles) {
-  var counts = {}
+  const counts = {}
   subtitles.tracks.forEach(function (track) {
-    var lang = track.language
+    const lang = track.language
     counts[lang] = (counts[lang] || 0) + 1
     track.label = counts[lang] > 1 ? (lang + ' ' + counts[lang]) : lang
   })

src/renderer/controllers/torrent-controller.js

@@ -2,7 +2,6 @@ const path = require('path')
 const ipcRenderer = require('electron').ipcRenderer
 
 const TorrentSummary = require('../lib/torrent-summary')
-const TorrentPlayer = require('../lib/torrent-player')
 const sound = require('../lib/sound')
 const {dispatch} = require('../lib/dispatcher')
 
@@ -12,12 +11,12 @@ module.exports = class TorrentController {
   }
 
   torrentInfoHash (torrentKey, infoHash) {
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    let torrentSummary = this.getTorrentSummary(torrentKey)
     console.log('got infohash for %s torrent %s',
       torrentSummary ? 'existing' : 'new', torrentKey)
 
     if (!torrentSummary) {
-      var torrents = this.state.saved.torrents
+      const torrents = this.state.saved.torrents
 
       // Check if an existing (non-active) torrent has the same info hash
       if (torrents.find((t) => t.infoHash === infoHash)) {
@@ -49,7 +48,7 @@ module.exports = class TorrentController {
     }
     dispatch('error', message)
 
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    const torrentSummary = this.getTorrentSummary(torrentKey)
     if (torrentSummary) {
       console.log('Pausing torrent %s due to error: %s', torrentSummary.infoHash, message)
       torrentSummary.status = 'paused'
@@ -59,21 +58,20 @@ module.exports = class TorrentController {
 
   torrentMetadata (torrentKey, torrentInfo) {
     // Summarize torrent
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    const torrentSummary = this.getTorrentSummary(torrentKey)
     torrentSummary.status = 'downloading'
     torrentSummary.name = torrentSummary.displayName || torrentInfo.name
     torrentSummary.path = torrentInfo.path
     torrentSummary.magnetURI = torrentInfo.magnetURI
     // TODO: make torrentInfo immutable, save separately as torrentSummary.info
     // For now, check whether torrentSummary.files has already been set:
-    var hasDetailedFileInfo = torrentSummary.files && torrentSummary.files[0].path
+    const hasDetailedFileInfo = torrentSummary.files && torrentSummary.files[0].path
     if (!hasDetailedFileInfo) {
       torrentSummary.files = torrentInfo.files
     }
     if (!torrentSummary.selections) {
       torrentSummary.selections = torrentSummary.files.map((x) => true)
     }
-    torrentSummary.defaultPlayFileIndex = TorrentPlayer.pickFileToPlay(torrentInfo.files)
     dispatch('update')
 
     // Save the .torrent file, if it hasn't been saved already
@@ -85,7 +83,7 @@ module.exports = class TorrentController {
 
   torrentDone (torrentKey, torrentInfo) {
     // Update the torrent summary
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    const torrentSummary = this.getTorrentSummary(torrentKey)
     torrentSummary.status = 'seeding'
 
     // Notify the user that a torrent finished, but only if we actually DL'd at least part of it.
@@ -102,22 +100,18 @@ module.exports = class TorrentController {
   }
 
   torrentProgress (progressInfo) {
-    // Overall progress across all active torrents, 0 to 1
-    var progress = progressInfo.progress
-    var hasActiveTorrents = progressInfo.hasActiveTorrents
-
+    // Overall progress across all active torrents, 0 to 1, or -1 to hide the progress bar
     // Hide progress bar when client has no torrents, or progress is 100%
-    // TODO: isn't this equivalent to: if (progress === 1) ?
-    if (!hasActiveTorrents || progress === 1) {
-      progress = -1
-    }
+    const progress = (!progressInfo.hasActiveTorrents || progressInfo.progress === 1)
+      ? -1
+      : progressInfo.progress
 
     // Show progress bar under the WebTorrent taskbar icon, on OSX
     this.state.dock.progress = progress
 
     // Update progress for each individual torrent
     progressInfo.torrents.forEach((p) => {
-      var torrentSummary = this.getTorrentSummary(p.torrentKey)
+      const torrentSummary = this.getTorrentSummary(p.torrentKey)
       if (!torrentSummary) {
         console.log('warning: got progress for missing torrent %s', p.torrentKey)
         return
@@ -132,27 +126,28 @@ module.exports = class TorrentController {
   }
 
   torrentFileModtimes (torrentKey, fileModtimes) {
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    const torrentSummary = this.getTorrentSummary(torrentKey)
+    if (!torrentSummary) throw new Error('Not saving modtimes for deleted torrent ' + torrentKey)
     torrentSummary.fileModtimes = fileModtimes
-    dispatch('saveStateThrottled')
+    dispatch('stateSave')
   }
 
   torrentFileSaved (torrentKey, torrentFileName) {
     console.log('torrent file saved %s: %s', torrentKey, torrentFileName)
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    const torrentSummary = this.getTorrentSummary(torrentKey)
     torrentSummary.torrentFileName = torrentFileName
-    dispatch('saveStateThrottled')
+    dispatch('stateSave')
   }
 
   torrentPosterSaved (torrentKey, posterFileName) {
-    var torrentSummary = this.getTorrentSummary(torrentKey)
+    const torrentSummary = this.getTorrentSummary(torrentKey)
     torrentSummary.posterFileName = posterFileName
-    dispatch('saveStateThrottled')
+    dispatch('stateSave')
   }
 
   torrentAudioMetadata (infoHash, index, info) {
-    var torrentSummary = this.getTorrentSummary(infoHash)
-    var fileSummary = torrentSummary.files[index]
+    const torrentSummary = this.getTorrentSummary(infoHash)
+    const fileSummary = torrentSummary.files[index]
     fileSummary.audioInfo = info
     dispatch('update')
   }
@@ -169,7 +164,7 @@ module.exports = class TorrentController {
 }
 
 function getTorrentPath (torrentSummary) {
-  var itemPath = TorrentSummary.getFileOrFolder(torrentSummary)
+  let itemPath = TorrentSummary.getFileOrFolder(torrentSummary)
   if (torrentSummary.files.length > 1) {
     itemPath = path.dirname(itemPath)
   }
@@ -177,12 +172,12 @@ function getTorrentPath (torrentSummary) {
 }
 
 function showDoneNotification (torrent) {
-  var notif = new window.Notification('Download Complete', {
+  const notif = new window.Notification('Download Complete', {
     body: torrent.name,
     silent: true
   })
 
-  notif.onClick = function () {
+  notif.onclick = function () {
     ipcRenderer.send('show')
   }
 

src/renderer/controllers/torrent-list-controller.js

@@ -3,7 +3,7 @@ const path = require('path')
 const electron = require('electron')
 
 const {dispatch} = require('../lib/dispatcher')
-const State = require('../lib/state')
+const {TorrentKeyNotFoundError} = require('../lib/errors')
 const sound = require('../lib/sound')
 const TorrentSummary = require('../lib/torrent-summary')
 
@@ -17,21 +17,26 @@ module.exports = class TorrentListController {
     this.state = state
   }
 
-  // Adds a torrent to the list, starts downloading/seeding. TorrentID can be a
-  // magnet URI, infohash, or torrent file: https://github.com/feross/webtorrent#clientaddtorrentid-opts-function-ontorrent-torrent-
+  // Adds a torrent to the list, starts downloading/seeding.
+  // TorrentID can be a magnet URI, infohash, or torrent file: https://git.io/vik9M
   addTorrent (torrentId) {
     if (torrentId.path) {
       // Use path string instead of W3C File object
       torrentId = torrentId.path
     }
 
+    // Trim extra spaces off pasted magnet links
+    if (typeof torrentId === 'string') {
+      torrentId = torrentId.trim()
+    }
+
     // Allow a instant.io link to be pasted
     if (typeof torrentId === 'string' && instantIoRegex.test(torrentId)) {
       torrentId = torrentId.slice(torrentId.indexOf('#') + 1)
     }
 
-    var torrentKey = this.state.nextTorrentKey++
-    var path = this.state.saved.prefs.downloadPath
+    const torrentKey = this.state.nextTorrentKey++
+    const path = this.state.saved.prefs.downloadPath
 
     ipcRenderer.send('wt-start-torrenting', torrentKey, torrentId, path)
 
@@ -66,16 +71,16 @@ module.exports = class TorrentListController {
 
   // Creates a new torrent and start seeeding
   createTorrent (options) {
-    var state = this.state
-    var torrentKey = state.nextTorrentKey++
+    const state = this.state
+    const torrentKey = state.nextTorrentKey++
     ipcRenderer.send('wt-create-torrent', torrentKey, options)
     state.location.cancel()
   }
 
   // Starts downloading and/or seeding a given torrentSummary.
   startTorrentingSummary (torrentKey) {
-    var s = TorrentSummary.getByKey(this.state, torrentKey)
-    if (!s) throw new Error('Missing key: ' + torrentKey)
+    const s = TorrentSummary.getByKey(this.state, torrentKey)
+    if (!s) throw new TorrentKeyNotFoundError(torrentKey)
 
     // New torrent: give it a path
     if (!s.path) {
@@ -84,10 +89,16 @@ module.exports = class TorrentListController {
       return start()
     }
 
+    const fileOrFolder = TorrentSummary.getFileOrFolder(s)
+
+    // New torrent: metadata not yet received
+    if (!fileOrFolder) return start()
+
     // Existing torrent: check that the path is still there
-    fs.stat(TorrentSummary.getFileOrFolder(s), function (err) {
+    fs.stat(fileOrFolder, function (err) {
       if (err) {
         s.error = 'path-missing'
+        dispatch('backToList')
         return
       }
       start()
@@ -96,88 +107,89 @@ module.exports = class TorrentListController {
     function start () {
       ipcRenderer.send('wt-start-torrenting',
         s.torrentKey,
-        TorrentSummary.getTorrentID(s),
+        TorrentSummary.getTorrentId(s),
         s.path,
         s.fileModtimes,
         s.selections)
     }
   }
 
-  pauseAll ({filter, excluded}) {
-    this.state.saved.torrents.map((torrent) => {
-      // "excluded" is an array of torrents that should not be paused
-      if (excluded) {
-        var isExcluded = excluded.some((excludeInfoHash) => {
-          if (excludeInfoHash === torrent.infoHash) return true
-        })
-        if (isExcluded) return
-      }
-
-      // don't play sounds when pausing all
-      var wasPaused = this.pauseTorrent(torrent, false, filter)
-
-      // if torrent was paused add it to paused torrents collection
-      // we will use this collection to resume downloading when playback stops
-      if (wasPaused) this.state.saved.pausedTorrents.push(torrent.infoHash)
-    })
-  }
-
-  resumePausedTorrents () {
-    this.state.saved.pausedTorrents.map((infoHash) => {
-      var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
-      this.startTorrent(torrentSummary)
-    })
-
-    // reset paused torrents
-    this.state.saved.pausedTorrents = []
-  }
-
   // TODO: use torrentKey, not infoHash
   toggleTorrent (infoHash) {
-    var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
-
-    // start
+    const torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
     if (torrentSummary.status === 'paused') {
-      this.startTorrent(torrentSummary, true)
+      torrentSummary.status = 'new'
+      this.startTorrentingSummary(torrentSummary.torrentKey)
+      sound.play('ENABLE')
       return
-    }
+    } 
 
-    // pause
     this.pauseTorrent(torrentSummary, true)
   }
 
-  startTorrent (torrentSummary, playSound) {
-    torrentSummary.status = 'new'
-    this.startTorrentingSummary(torrentSummary.torrentKey)
-
-    if (playSound) sound.play('ENABLE')
+  pauseAllTorrents () {
+    this.state.saved.torrents.forEach((torrentSummary) => {
+      if (torrentSummary.status === 'downloading' ||
+          torrentSummary.status === 'seeding') {
+        torrentSummary.status = 'paused'
+        ipcRenderer.send('wt-stop-torrenting', torrentSummary.infoHash)
+      }
+    })
+    sound.play('DISABLE')
   }
 
-  pauseTorrent (torrentSummary, playSound, filter) {
-    if (filter && !this.matchesFilter(torrentSummary, filter)) return false
+  resumeAllTorrents () {
+    this.state.saved.torrents.forEach((torrentSummary) => {
+      if (torrentSummary.status === 'paused') {
+        torrentSummary.status = 'downloading'
+        this.startTorrentingSummary(torrentSummary.torrentKey)
+      }
+    })
+    sound.play('ENABLE')
+  }
 
+  pauseTorrent (torrentSummary, playSound) {
     torrentSummary.status = 'paused'
     ipcRenderer.send('wt-stop-torrenting', torrentSummary.infoHash)
 
     if (playSound) sound.play('DISABLE')
-    return true
   }
 
-  matchesFilter (torrentSummary, filter) {
-    var keys = Object.keys(filter)
-    var matches = keys.some((key) => {
-      if (!torrentSummary[key].match(filter[key])) return false
-      return true
+  prioritizeTorrent (infoHash) {
+    this.state.saved.torrents
+    .filter((torrent) => { // We're interested in active torrents only.
+      return (['downloading', 'seeding'].indexOf(torrent.status) !== -1)
     })
-    return matches
+    .map((torrent) => { // Pause all active torrents except the one that started playing.
+      if (infoHash === torrent.infoHash) return
+
+      // Pause torrent without playing sounds.
+      this.pauseTorrent(torrent, false)
+
+      this.state.saved.torrentsToResume.push(torrent.infoHash)
+    })
+
+    console.log('Playback Priority: paused torrents: ', this.state.saved.torrentsToResume)
+  }
+
+  resumePausedTorrents () {
+    console.log('Playback Priority: resuming paused torrents')
+    this.state.saved.torrentsToResume.map((infoHash) => {
+      this.toggleTorrent(infoHash)
+    })
+
+    // reset paused torrents
+    this.state.saved.torrentsToResume = []
   }
 
   toggleTorrentFile (infoHash, index) {
-    var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
+    const torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
     torrentSummary.selections[index] = !torrentSummary.selections[index]
 
     // Let the WebTorrent process know to start or stop fetching that file
-    ipcRenderer.send('wt-select-files', infoHash, torrentSummary.selections)
+    if (torrentSummary.status !== 'paused') {
+      ipcRenderer.send('wt-select-files', infoHash, torrentSummary.selections)
+    }
   }
 
   confirmDeleteTorrent (infoHash, deleteData) {
@@ -192,24 +204,25 @@ module.exports = class TorrentListController {
   deleteTorrent (infoHash, deleteData) {
     ipcRenderer.send('wt-stop-torrenting', infoHash)
 
-    var index = this.state.saved.torrents.findIndex((x) => x.infoHash === infoHash)
+    const index = this.state.saved.torrents.findIndex((x) => x.infoHash === infoHash)
 
     if (index > -1) {
-      var summary = this.state.saved.torrents[index]
+      const summary = this.state.saved.torrents[index]
 
       // remove torrent and poster file
       deleteFile(TorrentSummary.getTorrentPath(summary))
-      deleteFile(TorrentSummary.getPosterPath(summary)) // TODO: will the css path hack affect windows?
+      deleteFile(TorrentSummary.getPosterPath(summary))
 
       // optionally delete the torrent data
       if (deleteData) moveItemToTrash(summary)
 
       // remove torrent from saved list
       this.state.saved.torrents.splice(index, 1)
-      State.saveThrottled(this.state)
+      dispatch('stateSave')
     }
 
-    this.state.location.clearForward('player') // prevent user from going forward to a deleted torrent
+    // prevent user from going forward to a deleted torrent
+    this.state.location.clearForward('player')
     sound.play('DELETE')
   }
 
@@ -222,8 +235,8 @@ module.exports = class TorrentListController {
   }
 
   openTorrentContextMenu (infoHash) {
-    var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
-    var menu = new electron.remote.Menu()
+    const torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
+    const menu = new electron.remote.Menu()
 
     menu.append(new electron.remote.MenuItem({
       label: 'Remove From List',
@@ -261,39 +274,70 @@ module.exports = class TorrentListController {
 
     menu.append(new electron.remote.MenuItem({
       label: 'Save Torrent File As...',
-      click: () => saveTorrentFileAs(torrentSummary)
+      click: () => dispatch('saveTorrentFileAs', torrentSummary.torrentKey),
+      enabled: torrentSummary.torrentFileName != null
     }))
 
     menu.popup(electron.remote.getCurrentWindow())
   }
+
+  // Takes a torrentSummary or torrentKey
+  // Shows a Save File dialog, then saves the .torrent file wherever the user requests
+  saveTorrentFileAs (torrentKey) {
+    const torrentSummary = TorrentSummary.getByKey(this.state, torrentKey)
+    if (!torrentSummary) throw new Error('Missing torrentKey: ' + torrentKey)
+    const downloadPath = this.state.saved.prefs.downloadPath
+    const newFileName = path.parse(torrentSummary.name).name + '.torrent'
+    const win = electron.remote.getCurrentWindow()
+    const opts = {
+      title: 'Save Torrent File',
+      defaultPath: path.join(downloadPath, newFileName),
+      filters: [
+        { name: 'Torrent Files', extensions: ['torrent'] },
+        { name: 'All Files', extensions: ['*'] }
+      ]
+    }
+
+    electron.remote.dialog.showSaveDialog(win, opts, function (savePath) {
+      console.log('Saving torrent ' + torrentKey + ' to ' + savePath)
+      if (!savePath) return // They clicked Cancel
+      const torrentPath = TorrentSummary.getTorrentPath(torrentSummary)
+      fs.readFile(torrentPath, function (err, torrentFile) {
+        if (err) return dispatch('error', err)
+        fs.writeFile(savePath, torrentFile, function (err) {
+          if (err) return dispatch('error', err)
+        })
+      })
+    })
+  }
 }
 
 // Recursively finds {name, path, size} for all files in a folder
 // Calls `cb` on success, calls `onError` on failure
-function findFilesRecursive (paths, cb) {
+function findFilesRecursive (paths, cb_) {
   if (paths.length > 1) {
-    var numComplete = 0
-    var ret = []
+    let numComplete = 0
+    let ret = []
     paths.forEach(function (path) {
       findFilesRecursive([path], function (fileObjs) {
-        ret = ret.concat(fileObjs)
+        ret.push(...fileObjs)
         if (++numComplete === paths.length) {
           ret.sort((a, b) => a.path < b.path ? -1 : a.path > b.path)
-          cb(ret)
+          cb_(ret)
         }
       })
     })
     return
   }
 
-  var fileOrFolder = paths[0]
+  const fileOrFolder = paths[0]
   fs.stat(fileOrFolder, function (err, stat) {
     if (err) return dispatch('error', err)
 
     // Files: return name, path, and size
     if (!stat.isDirectory()) {
-      var filePath = fileOrFolder
-      return cb([{
+      const filePath = fileOrFolder
+      return cb_([{
         name: path.basename(filePath),
         path: filePath,
         size: stat.size
@@ -301,11 +345,11 @@ function findFilesRecursive (paths, cb) {
     }
 
     // Folders: recurse, make a list of all the files
-    var folderPath = fileOrFolder
+    const folderPath = fileOrFolder
     fs.readdir(folderPath, function (err, fileNames) {
       if (err) return dispatch('error', err)
-      var paths = fileNames.map((fileName) => path.join(folderPath, fileName))
-      findFilesRecursive(paths, cb)
+      const paths = fileNames.map((fileName) => path.join(folderPath, fileName))
+      findFilesRecursive(paths, cb_)
     })
   })
 }
@@ -319,33 +363,10 @@ function deleteFile (path) {
 
 // Delete all files in a torrent
 function moveItemToTrash (torrentSummary) {
-  var filePath = TorrentSummary.getFileOrFolder(torrentSummary)
+  const filePath = TorrentSummary.getFileOrFolder(torrentSummary)
   if (filePath) ipcRenderer.send('moveItemToTrash', filePath)
 }
 
 function showItemInFolder (torrentSummary) {
   ipcRenderer.send('showItemInFolder', TorrentSummary.getFileOrFolder(torrentSummary))
 }
-
-function saveTorrentFileAs (torrentSummary) {
-  var downloadPath = this.state.saved.prefs.downloadPath
-  var newFileName = path.parse(torrentSummary.name).name + '.torrent'
-  var opts = {
-    title: 'Save Torrent File',
-    defaultPath: path.join(downloadPath, newFileName),
-    filters: [
-      { name: 'Torrent Files', extensions: ['torrent'] },
-      { name: 'All Files', extensions: ['*'] }
-    ]
-  }
-  electron.remote.dialog.showSaveDialog(electron.remote.getCurrentWindow(), opts, function (savePath) {
-    if (!savePath) return // They clicked Cancel
-    var torrentPath = TorrentSummary.getTorrentPath(torrentSummary)
-    fs.readFile(torrentPath, function (err, torrentFile) {
-      if (err) return dispatch('error', err)
-      fs.writeFile(savePath, torrentFile, function (err) {
-        if (err) return dispatch('error', err)
-      })
-    })
-  })
-}

src/renderer/controllers/update-controller.js

@@ -1,4 +1,4 @@
-const State = require('../lib/state')
+const {dispatch} = require('../lib/dispatcher')
 
 // Controls the UI checking for new versions of the app, prompting install
 module.exports = class UpdateController {
@@ -8,7 +8,7 @@ module.exports = class UpdateController {
 
   // Shows a modal saying that we have an update
   updateAvailable (version) {
-    var skipped = this.state.saved.skippedVersions
+    const skipped = this.state.saved.skippedVersions
     if (skipped && skipped.includes(version)) {
       console.log('new version skipped by user: v' + version)
       return
@@ -18,9 +18,9 @@ module.exports = class UpdateController {
 
   // Don't show the modal again until the next version
   skipVersion (version) {
-    var skipped = this.state.saved.skippedVersions
+    let skipped = this.state.saved.skippedVersions
     if (!skipped) skipped = this.state.saved.skippedVersions = []
     skipped.push(version)
-    State.saveThrottled(this.state)
+    dispatch('stateSave')
   }
 }

src/renderer/lib/capture-video-frame.js

@@ -1,30 +0,0 @@
-module.exports = captureVideoFrame
-
-function captureVideoFrame (video, format) {
-  if (typeof video === 'string') {
-    video = document.querySelector(video)
-  }
-
-  if (video == null || video.nodeName !== 'VIDEO') {
-    throw new Error('First argument must be a <video> element or selector')
-  }
-
-  if (format == null) {
-    format = 'png'
-  }
-
-  if (format !== 'png' && format !== 'jpg' && format !== 'webp') {
-    throw new Error('Second argument must be one of "png", "jpg", or "webp"')
-  }
-
-  var canvas = document.createElement('canvas')
-  canvas.width = video.videoWidth
-  canvas.height = video.videoHeight
-
-  canvas.getContext('2d').drawImage(video, 0, 0)
-
-  var dataUri = canvas.toDataURL('image/' + format)
-  var data = dataUri.split(',')[1]
-
-  return new Buffer(data, 'base64')
-}

src/renderer/lib/cast.js

@@ -13,25 +13,35 @@ module.exports = {
   setRate
 }
 
-// Lazy load these for a ~300ms improvement in startup time
-var airplayer, chromecasts, dlnacasts
+const config = require('../../config')
+const {CastingError} = require('./errors')
 
-var config = require('../../config')
+// Lazy load these for a ~300ms improvement in startup time
+let airplayer, chromecasts, dlnacasts
 
 // App state. Cast modifies state.playing and state.errors in response to events
-var state
+let state
 
 // Callback to notify module users when state has changed
-var update
+let update
 
 // setInterval() for updating cast status
-var statusInterval = null
+let statusInterval = null
 
 // Start looking for cast devices on the local network
 function init (appState, callback) {
   state = appState
   update = callback
 
+  // Don't actually cast during integration tests
+  // (Otherwise you'd need a physical Chromecast + AppleTV + DLNA TV to run them.)
+  if (config.IS_TEST) {
+    state.devices.chromecast = testPlayer('chromecast')
+    state.devices.airplay = testPlayer('airplay')
+    state.devices.dlna = testPlayer('dlna')
+    return
+  }
+
   // Load modules, scan the network for devices
   airplayer = require('airplayer')()
   chromecasts = require('chromecasts')()
@@ -57,9 +67,35 @@ function init (appState, callback) {
   })
 }
 
+// integration test player implementation
+function testPlayer (type) {
+  return {
+    getDevices,
+    open,
+    play,
+    pause,
+    stop,
+    status,
+    seek,
+    volume
+  }
+
+  function getDevices () {
+    return [{name: type + '-1'}, {name: type + '-2'}]
+  }
+
+  function open () {}
+  function play () {}
+  function pause () {}
+  function stop () {}
+  function status () {}
+  function seek () {}
+  function volume () {}
+}
+
 // chromecast player implementation
 function chromecastPlayer () {
-  var ret = {
+  const ret = {
     device: null,
     addDevice,
     getDevices,
@@ -95,8 +131,8 @@ function chromecastPlayer () {
   }
 
   function open () {
-    var torrentSummary = state.saved.torrents.find((x) => x.infoHash === state.playing.infoHash)
-    ret.device.play(state.server.networkURL, {
+    const torrentSummary = state.saved.torrents.find((x) => x.infoHash === state.playing.infoHash)
+    ret.device.play(state.server.networkURL + '/' + state.playing.fileIndex, {
       type: 'video/mp4',
       title: config.APP_NAME + ' - ' + torrentSummary.name
     }, function (err) {
@@ -126,13 +162,7 @@ function chromecastPlayer () {
   }
 
   function status () {
-    ret.device.status(function (err, status) {
-      if (err) return console.log('error getting %s status: %o', state.playing.location, err)
-      state.playing.isPaused = status.playerState === 'PAUSED'
-      state.playing.currentTime = status.currentTime
-      state.playing.volume = status.volume.muted ? 0 : status.volume.level
-      update()
-    })
+    ret.device.status(handleStatus)
   }
 
   function seek (time, callback) {
@@ -146,7 +176,7 @@ function chromecastPlayer () {
 
 // airplay player implementation
 function airplayPlayer () {
-  var ret = {
+  const ret = {
     device: null,
     addDevice,
     getDevices,
@@ -183,7 +213,7 @@ function airplayPlayer () {
   }
 
   function open () {
-    ret.device.play(state.server.networkURL, function (err, res) {
+    ret.device.play(state.server.networkURL + '/' + state.playing.fileIndex, function (err, res) {
       if (err) {
         state.playing.location = 'local'
         state.errors.push({
@@ -238,7 +268,7 @@ function airplayPlayer () {
 
 // DLNA player implementation
 function dlnaPlayer (player) {
-  var ret = {
+  const ret = {
     device: null,
     addDevice,
     getDevices,
@@ -274,8 +304,8 @@ function dlnaPlayer (player) {
   }
 
   function open () {
-    var torrentSummary = state.saved.torrents.find((x) => x.infoHash === state.playing.infoHash)
-    ret.device.play(state.server.networkURL, {
+    const torrentSummary = state.saved.torrents.find((x) => x.infoHash === state.playing.infoHash)
+    ret.device.play(state.server.networkURL + '/' + state.playing.fileIndex, {
       type: 'video/mp4',
       title: config.APP_NAME + ' - ' + torrentSummary.name,
       seek: state.playing.currentTime > 10 ? state.playing.currentTime : 0
@@ -306,13 +336,7 @@ function dlnaPlayer (player) {
   }
 
   function status () {
-    ret.device.status(function (err, status) {
-      if (err) return console.log('error getting %s status: %o', state.playing.location, err)
-      state.playing.isPaused = status.playerState === 'PAUSED'
-      state.playing.currentTime = status.currentTime
-      state.playing.volume = status.volume.level
-      update()
-    })
+    ret.device.status(handleStatus)
   }
 
   function seek (time, callback) {
@@ -328,10 +352,22 @@ function dlnaPlayer (player) {
   }
 }
 
+function handleStatus (err, status) {
+  if (err || !status) {
+    return console.log('error getting %s status: %o',
+      state.playing.location,
+      err || 'missing response')
+  }
+  state.playing.isPaused = status.playerState === 'PAUSED'
+  state.playing.currentTime = status.currentTime
+  state.playing.volume = status.volume.muted ? 0 : status.volume.level
+  update()
+}
+
 // Start polling cast device state, whenever we're connected
 function startStatusInterval () {
   statusInterval = setInterval(function () {
-    var player = getPlayer()
+    const player = getPlayer()
     if (player) player.status()
   }, 1000)
 }
@@ -350,23 +386,27 @@ function toggleMenu (location) {
 
   // Never cast to two devices at the same time
   if (state.playing.location !== 'local') {
-    throw new Error('You can\'t connect to ' + location + ' when already connected to another device')
+    throw new CastingError(
+      `You can't connect to ${location} when already connected to another device`
+    )
   }
 
   // Find all cast devices of the given type
-  var player = getPlayer(location)
-  var devices = player ? player.getDevices() : []
-  if (devices.length === 0) throw new Error('No ' + location + ' devices available')
+  const player = getPlayer(location)
+  const devices = player ? player.getDevices() : []
+  if (devices.length === 0) {
+    throw new CastingError(`No ${location} devices available`)
+  }
 
   // Show a menu
   state.devices.castMenu = {location, devices}
 }
 
 function selectDevice (index) {
-  var {location, devices} = state.devices.castMenu
+  const {location, devices} = state.devices.castMenu
 
   // Start casting
-  var player = getPlayer(location)
+  const player = getPlayer(location)
   player.device = devices[index]
   player.open()
 
@@ -382,7 +422,7 @@ function selectDevice (index) {
 
 // Stops casting, move video back to local screen
 function stop () {
-  var player = getPlayer()
+  const player = getPlayer()
   if (player) {
     player.stop(function () {
       player.device = null
@@ -417,18 +457,18 @@ function getPlayer (location) {
 }
 
 function play () {
-  var player = getPlayer()
+  const player = getPlayer()
   if (player) player.play(castCallback)
 }
 
 function pause () {
-  var player = getPlayer()
+  const player = getPlayer()
   if (player) player.pause(castCallback)
 }
 
 function setRate (rate) {
-  var player
-  var result = true
+  let player
+  let result = true
   if (state.playing.location === 'chromecast') {
     // TODO find how to control playback rate on chromecast
     castCallback()
@@ -443,12 +483,12 @@ function setRate (rate) {
 }
 
 function seek (time) {
-  var player = getPlayer()
+  const player = getPlayer()
   if (player) player.seek(time, castCallback)
 }
 
 function setVolume (volume) {
-  var player = getPlayer()
+  const player = getPlayer()
   if (player) player.volume(volume, castCallback)
 }
 

src/renderer/lib/dispatcher.js

@@ -4,8 +4,8 @@ module.exports = {
   setDispatch
 }
 
-var dispatchers = {}
-var _dispatch = function () {}
+const dispatchers = {}
+let _dispatch = function () {}
 
 function setDispatch (dispatch) {
   _dispatch = dispatch
@@ -20,8 +20,8 @@ function dispatch (...args) {
 // function. This prevents React from updating the listener functions on
 // each update().
 function dispatcher (...args) {
-  var str = JSON.stringify(args)
-  var handler = dispatchers[str]
+  const str = JSON.stringify(args)
+  let handler = dispatchers[str]
   if (!handler) {
     handler = dispatchers[str] = function (e) {
       // Do not propagate click to elements below the button

src/renderer/lib/errors.js

@@ -1,8 +1,41 @@
-module.exports = {
-  UnplayableError
+const ExtendableError = require('es6-error')
+
+/* Generic errors */
+
+class CastingError extends ExtendableError {}
+class PlaybackError extends ExtendableError {}
+class SoundError extends ExtendableError {}
+class TorrentError extends ExtendableError {}
+
+/* Playback */
+
+class UnplayableTorrentError extends PlaybackError {
+  constructor () { super('Can\'t play any files in torrent') }
 }
 
-function UnplayableError () {
-  this.message = 'Can\'t play any files in torrent'
+class UnplayableFileError extends PlaybackError {
+  constructor () { super('Can\'t play that file') }
+}
+
+/* Sound */
+
+class InvalidSoundNameError extends SoundError {
+  constructor (name) { super(`Invalid sound name: ${name}`) }
+}
+
+/* Torrent */
+
+class TorrentKeyNotFoundError extends TorrentError {
+  constructor (torrentKey) { super(`Can't resolve torrent key ${torrentKey}`) }
+}
+
+module.exports = {
+  CastingError,
+  PlaybackError,
+  SoundError,
+  TorrentError,
+  UnplayableTorrentError,
+  UnplayableFileError,
+  InvalidSoundNameError,
+  TorrentKeyNotFoundError
 }
-UnplayableError.prototype = Error

src/renderer/lib/migrations.js

@@ -4,10 +4,11 @@ module.exports = {
   run
 }
 
-const semver = require('semver')
-const config = require('../../config')
-const TorrentSummary = require('./torrent-summary')
 const fs = require('fs')
+const path = require('path')
+const semver = require('semver')
+
+const config = require('../../config')
 
 // Change `state.saved` (which will be saved back to config.json on exit) as
 // needed, for example to deal with config.json format changes across versions
@@ -17,34 +18,27 @@ function run (state) {
     state.saved.version = '0.0.0' // Pre-0.7.0 version, so run all migrations
   }
 
-  var version = state.saved.version
+  const version = state.saved.version
+  const saved = state.saved
 
-  if (semver.lt(version, '0.7.0')) {
-    migrate_0_7_0(state.saved)
-  }
-
-  if (semver.lt(version, '0.7.2')) {
-    migrate_0_7_2(state.saved)
-  }
-
-  if (semver.lt(version, '0.11.0')) {
-    migrate_0_11_0(state.saved)
-  }
-
-  if (semver.lt(version, '0.12.0')) {
-    migrate_0_12_0(state.saved)
-  }
+  if (semver.lt(version, '0.7.0')) migrate_0_7_0(saved)
+  if (semver.lt(version, '0.7.2')) migrate_0_7_2(saved)
+  if (semver.lt(version, '0.11.0')) migrate_0_11_0(saved)
+  if (semver.lt(version, '0.12.0')) migrate_0_12_0(saved)
+  if (semver.lt(version, '0.14.0')) migrate_0_14_0(saved)
+  if (semver.lt(version, '0.17.0')) migrate_0_17_0(saved)
+  if (semver.lt(version, '0.17.2')) migrate_0_17_2(saved)
 
   // Config is now on the new version
   state.saved.version = config.APP_VERSION
 }
 
 function migrate_0_7_0 (saved) {
-  var fs = require('fs-extra')
-  var path = require('path')
+  const cpFile = require('cp-file')
+  const path = require('path')
 
   saved.torrents.forEach(function (ts) {
-    var infoHash = ts.infoHash
+    const infoHash = ts.infoHash
 
     // Replace torrentPath with torrentFileName
     // There are a number of cases to handle here:
@@ -52,7 +46,7 @@ function migrate_0_7_0 (saved) {
     // * Then, relative paths for the default torrents, eg '../static/sintel.torrent'
     // * Then, paths computed at runtime for default torrents, eg 'sintel.torrent'
     // * Finally, now we're getting rid of torrentPath altogether
-    var src, dst
+    let src, dst
     if (ts.torrentPath) {
       if (path.isAbsolute(ts.torrentPath) || ts.torrentPath.startsWith('..')) {
         src = ts.torrentPath
@@ -62,7 +56,7 @@ function migrate_0_7_0 (saved) {
       dst = path.join(config.TORRENT_PATH, infoHash + '.torrent')
       // Synchronous FS calls aren't ideal, but probably OK in a migration
       // that only runs once
-      if (src !== dst) fs.copySync(src, dst)
+      if (src !== dst) cpFile.sync(src, dst)
 
       delete ts.torrentPath
       ts.torrentFileName = infoHash + '.torrent'
@@ -70,14 +64,14 @@ function migrate_0_7_0 (saved) {
 
     // Replace posterURL with posterFileName
     if (ts.posterURL) {
-      var extension = path.extname(ts.posterURL)
+      const extension = path.extname(ts.posterURL)
       src = path.isAbsolute(ts.posterURL)
         ? ts.posterURL
         : path.join(config.STATIC_PATH, ts.posterURL)
       dst = path.join(config.POSTER_PATH, infoHash + extension)
       // Synchronous FS calls aren't ideal, but probably OK in a migration
       // that only runs once
-      if (src !== dst) fs.copySync(src, dst)
+      if (src !== dst) cpFile.sync(src, dst)
 
       delete ts.posterURL
       ts.posterFileName = infoHash + extension
@@ -108,6 +102,8 @@ function migrate_0_11_0 (saved) {
 }
 
 function migrate_0_12_0 (saved) {
+  const TorrentSummary = require('./torrent-summary')
+
   if (saved.prefs.openExternalPlayer == null && saved.prefs.playInVlc != null) {
     saved.prefs.openExternalPlayer = saved.prefs.playInVlc
   }
@@ -116,7 +112,7 @@ function migrate_0_12_0 (saved) {
   // Undo a terrible bug where clicking Play on a default torrent on a fresh
   // install results in a "path missing" error
   // See https://github.com/feross/webtorrent-desktop/pull/806
-  var defaultTorrentFiles = [
+  const defaultTorrentFiles = [
     '6a9759bffd5c0af65319979fb7832189f4f3c35d.torrent',
     '88594aaacbde40ef3e2510c47374ec0aa396c08e.torrent',
     '6a02592d2bbc069628cd5ed8a54f88ee06ac0ba5.torrent',
@@ -125,13 +121,88 @@ function migrate_0_12_0 (saved) {
   ]
   saved.torrents.forEach(function (torrentSummary) {
     if (!defaultTorrentFiles.includes(torrentSummary.torrentFileName)) return
-    var fileOrFolder = TorrentSummary.getFileOrFolder(torrentSummary)
+    const fileOrFolder = TorrentSummary.getFileOrFolder(torrentSummary)
     if (!fileOrFolder) return
     try {
       fs.statSync(fileOrFolder)
-    } catch (e) {
+    } catch (err) {
       // Default torrent with "missing path" error. Clear path.
       delete torrentSummary.path
     }
   })
 }
+
+function migrate_0_14_0 (saved) {
+  saved.torrents.forEach(function (ts) {
+    delete ts.defaultPlayFileIndex
+  })
+}
+
+function migrate_0_17_0 (saved) {
+  // Fix a sad, sad bug that resulted in 100MB+ config.json files
+  saved.torrents.forEach(function (ts) {
+    if (!ts.files) return
+    ts.files.forEach(function (file) {
+      if (!file.audioInfo || !file.audioInfo.picture) return
+      // This contained a Buffer, which 30x'd in size when serialized to JSON
+      delete file.audioInfo.picture
+    })
+  })
+}
+
+function migrate_0_17_2 (saved) {
+  // Remove the trailing dot (.) from the Wired CD torrent name, since
+  // folders/files that end in a trailing dot (.) or space are not deletable from
+  // Windows Explorer. See: https://github.com/feross/webtorrent-desktop/issues/905
+
+  const cpFile = require('cp-file')
+  const rimraf = require('rimraf')
+
+  const OLD_NAME = 'The WIRED CD - Rip. Sample. Mash. Share.'
+  const NEW_NAME = 'The WIRED CD - Rip. Sample. Mash. Share'
+
+  const OLD_HASH = '3ba219a8634bf7bae3d848192b2da75ae995589d'
+  const NEW_HASH = 'a88fda5954e89178c372716a6a78b8180ed4dad3'
+
+  const ts = saved.torrents.find((ts) => {
+    return ts.infoHash === OLD_HASH
+  })
+
+  if (!ts) return // Wired CD torrent does not exist
+
+  // New versions of WebTorrent ship with a fixed torrent file. Let's fix up the
+  // name in existing versions of WebTorrent.
+  ts.name = ts.displayName = NEW_NAME
+  ts.files.forEach((file) => {
+    file.path = file.path.replace(OLD_NAME, NEW_NAME)
+  })
+
+  // Changing the torrent name causes the info hash to change
+  ts.infoHash = NEW_HASH
+  ts.magnetURI = ts.magnetURI.replace(OLD_HASH, NEW_HASH)
+
+  try {
+    fs.renameSync(
+      path.join(config.POSTER_PATH, ts.posterFileName),
+      path.join(config.POSTER_PATH, NEW_HASH + '.jpg')
+    )
+  } catch (err) {}
+  ts.posterFileName = NEW_HASH + '.jpg'
+
+  rimraf.sync(path.join(config.TORRENT_PATH, ts.torrentFileName))
+  cpFile.sync(
+    path.join(config.STATIC_PATH, 'wiredCd.torrent'),
+    path.join(config.TORRENT_PATH, NEW_HASH + '.torrent')
+  )
+  ts.torrentFileName = NEW_HASH + '.torrent'
+
+  if (ts.path) {
+    // If torrent folder already exists on disk, try to rename it
+    try {
+      fs.renameSync(
+        path.join(ts.path, OLD_NAME),
+        path.join(ts.path, NEW_NAME)
+      )
+    } catch (err) {}
+  }
+}

src/renderer/lib/playlist.js

@@ -0,0 +1,87 @@
+module.exports = {
+  hasNext,
+  getNextIndex,
+  hasPrevious,
+  getPreviousIndex,
+  getCurrentLocalURL
+}
+
+const TorrentSummary = require('./torrent-summary')
+const TorrentPlayer = require('./torrent-player')
+
+const cache = {
+  infoHash: null,
+  previousIndex: null,
+  currentIndex: null,
+  nextIndex: null
+}
+
+function hasNext (state) {
+  updateCache(state)
+  return cache.nextIndex !== null
+}
+
+function getNextIndex (state) {
+  updateCache(state)
+  return cache.nextIndex
+}
+
+function hasPrevious (state) {
+  updateCache(state)
+  return cache.previousIndex !== null
+}
+
+function getPreviousIndex (state) {
+  updateCache(state)
+  return cache.previousIndex
+}
+
+function getCurrentLocalURL (state) {
+  return state.server
+    ? state.server.localURL + '/' + state.playing.fileIndex
+    : ''
+}
+
+function updateCache (state) {
+  const infoHash = state.playing.infoHash
+  const fileIndex = state.playing.fileIndex
+
+  if (infoHash === cache.infoHash) {
+    switch (fileIndex) {
+      case cache.currentIndex:
+        return
+      case cache.nextIndex:
+        cache.previousIndex = cache.currentIndex
+        cache.currentIndex = fileIndex
+        cache.nextIndex = findNextIndex(state)
+        return
+      case cache.previousIndex:
+        cache.previousIndex = findPreviousIndex(state)
+        cache.nextIndex = cache.currentIndex
+        cache.currentIndex = fileIndex
+        return
+    }
+  } else {
+    cache.infoHash = infoHash
+  }
+
+  cache.previousIndex = findPreviousIndex(state)
+  cache.currentIndex = fileIndex
+  cache.nextIndex = findNextIndex(state)
+}
+
+function findPreviousIndex (state) {
+  const files = TorrentSummary.getByKey(state, state.playing.infoHash).files
+  for (let i = state.playing.fileIndex - 1; i >= 0; i--) {
+    if (TorrentPlayer.isPlayable(files[i])) return i
+  }
+  return null
+}
+
+function findNextIndex (state) {
+  const files = TorrentSummary.getByKey(state, state.playing.infoHash).files
+  for (let i = state.playing.fileIndex + 1; i < files.length; i++) {
+    if (TorrentPlayer.isPlayable(files[i])) return i
+  }
+  return null
+}

src/renderer/lib/sound.js

@@ -1,28 +1,28 @@
 module.exports = {
-  preload,
   play
 }
 
-var config = require('../../config')
-var path = require('path')
+const config = require('../../config')
+const {InvalidSoundNameError} = require('./errors')
+const path = require('path')
 
-var VOLUME = 0.15
+const VOLUME = 0.25
 
 /* Cache of Audio elements, for instant playback */
-var cache = {}
+const cache = {}
 
-var sounds = {
+const sounds = {
   ADD: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'add.wav'),
     volume: VOLUME
   },
   DELETE: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'delete.wav'),
-    volume: VOLUME
+    volume: VOLUME * 0.5
   },
   DISABLE: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'disable.wav'),
-    volume: VOLUME
+    volume: VOLUME * 0.5
   },
   DONE: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'done.wav'),
@@ -30,7 +30,7 @@ var sounds = {
   },
   ENABLE: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'enable.wav'),
-    volume: VOLUME
+    volume: VOLUME * 0.5
   },
   ERROR: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'error.wav'),
@@ -42,27 +42,16 @@ var sounds = {
   },
   STARTUP: {
     url: 'file://' + path.join(config.STATIC_PATH, 'sound', 'startup.wav'),
-    volume: VOLUME * 2
-  }
-}
-
-function preload () {
-  for (var name in sounds) {
-    if (!cache[name]) {
-      var sound = sounds[name]
-      var audio = cache[name] = new window.Audio()
-      audio.volume = sound.volume
-      audio.src = sound.url
-    }
+    volume: VOLUME
   }
 }
 
 function play (name) {
-  var audio = cache[name]
+  let audio = cache[name]
   if (!audio) {
-    var sound = sounds[name]
+    const sound = sounds[name]
     if (!sound) {
-      throw new Error('Invalid sound name')
+      throw new InvalidSoundNameError(name)
     }
     audio = cache[name] = new window.Audio()
     audio.volume = sound.volume

src/renderer/lib/state.js

@@ -1,21 +1,30 @@
-var appConfig = require('application-config')('WebTorrent')
-var path = require('path')
-var {EventEmitter} = require('events')
+const appConfig = require('application-config')('WebTorrent')
+const path = require('path')
+const {EventEmitter} = require('events')
 
-var config = require('../../config')
-var migrations = require('./migrations')
+const config = require('../../config')
 
-var State = module.exports = Object.assign(new EventEmitter(), {
-  getDefaultPlayState,
-  load,
-  save,
-  saveThrottled
-})
+const SAVE_DEBOUNCE_INTERVAL = 1000
 
 appConfig.filePath = path.join(config.CONFIG_PATH, 'config.json')
 
+const State = module.exports = Object.assign(new EventEmitter(), {
+  getDefaultPlayState,
+  load,
+  // state.save() calls are rate-limited. Use state.saveImmediate() to skip limit.
+  save: function () {
+    // Perf optimization: Lazy-require debounce (and it's dependencies)
+    const debounce = require('debounce')
+    // After first State.save() invokation, future calls go straight to the
+    // debounced function
+    State.save = debounce(saveImmediate, SAVE_DEBOUNCE_INTERVAL)
+    State.save(...arguments)
+  },
+  saveImmediate
+})
+
 function getDefaultState () {
-  var LocationHistory = require('location-history')
+  const LocationHistory = require('location-history')
 
   return {
     /*
@@ -68,7 +77,9 @@ function getDefaultState () {
      * Getters, for convenience
      */
     getPlayingTorrentSummary,
-    getPlayingFileSummary
+    getPlayingFileSummary,
+    getExternalPlayerName,
+    shouldHidePlayerControls
   }
 }
 
@@ -81,6 +92,7 @@ function getDefaultPlayState () {
     type: null, /* 'audio' or 'video', could be 'other' if ever support eg streaming to VLC */
     currentTime: 0, /* seconds */
     duration: 1, /* seconds */
+    isReady: false,
     isPaused: true,
     isStalled: false,
     lastTimeUpdate: 0, /* Unix time in ms */
@@ -97,39 +109,40 @@ function getDefaultPlayState () {
 }
 
 /* If the saved state file doesn't exist yet, here's what we use instead */
-function setupSavedState (cb) {
-  var fs = require('fs-extra')
-  var parseTorrent = require('parse-torrent')
-  var parallel = require('run-parallel')
+function setupStateSaved (cb) {
+  const cpFile = require('cp-file')
+  const fs = require('fs')
+  const parseTorrent = require('parse-torrent')
+  const parallel = require('run-parallel')
 
-  var saved = {
+  const saved = {
     prefs: {
       downloadPath: config.DEFAULT_DOWNLOAD_PATH,
       isFileHandler: false,
       openExternalPlayer: false,
-      externalPlayerPath: null
+      externalPlayerPath: null,
+      startup: false
     },
     torrents: config.DEFAULT_TORRENTS.map(createTorrentObject),
+    torrentsToResume: [],
     version: config.APP_VERSION /* make sure we can upgrade gracefully later */
   }
 
-  var tasks = []
+  const tasks = []
 
   config.DEFAULT_TORRENTS.map(function (t, i) {
-    var infoHash = saved.torrents[i].infoHash
+    const infoHash = saved.torrents[i].infoHash
     tasks.push(function (cb) {
-      fs.copy(
+      cpFile(
         path.join(config.STATIC_PATH, t.posterFileName),
-        path.join(config.POSTER_PATH, infoHash + path.extname(t.posterFileName)),
-        cb
-      )
+        path.join(config.POSTER_PATH, infoHash + path.extname(t.posterFileName))
+      ).then(cb).catch(cb)
     })
     tasks.push(function (cb) {
-      fs.copy(
+      cpFile(
         path.join(config.STATIC_PATH, t.torrentFileName),
-        path.join(config.TORRENT_PATH, infoHash + '.torrent'),
-        cb
-      )
+        path.join(config.TORRENT_PATH, infoHash + '.torrent')
+      ).then(cb).catch(cb)
     })
   })
 
@@ -139,8 +152,9 @@ function setupSavedState (cb) {
   })
 
   function createTorrentObject (t) {
-    var torrent = fs.readFileSync(path.join(config.STATIC_PATH, t.torrentFileName))
-    var parsedTorrent = parseTorrent(torrent)
+    // TODO: Doing several fs.readFileSync calls during first startup is not ideal
+    const torrent = fs.readFileSync(path.join(config.STATIC_PATH, t.torrentFileName))
+    const parsedTorrent = parseTorrent(torrent)
 
     return {
       status: 'paused',
@@ -151,62 +165,80 @@ function setupSavedState (cb) {
       torrentFileName: parsedTorrent.infoHash + '.torrent',
       magnetURI: parseTorrent.toMagnetURI(parsedTorrent),
       files: parsedTorrent.files,
-      selections: parsedTorrent.files.map((x) => true)
+      selections: parsedTorrent.files.map((x) => true),
+      testID: t.testID
     }
   }
 }
 
 function getPlayingTorrentSummary () {
-  var infoHash = this.playing.infoHash
+  const infoHash = this.playing.infoHash
   return this.saved.torrents.find((x) => x.infoHash === infoHash)
 }
 
 function getPlayingFileSummary () {
-  var torrentSummary = this.getPlayingTorrentSummary()
+  const torrentSummary = this.getPlayingTorrentSummary()
   if (!torrentSummary) return null
   return torrentSummary.files[this.playing.fileIndex]
 }
 
-function load (cb) {
-  var state = getDefaultState()
+function getExternalPlayerName () {
+  const playerPath = this.saved.prefs.externalPlayerPath
+  if (!playerPath) return 'VLC'
+  return path.basename(playerPath).split('.')[0]
+}
 
+function shouldHidePlayerControls () {
+  return this.location.url() === 'player' &&
+    this.playing.mouseStationarySince !== 0 &&
+    new Date().getTime() - this.playing.mouseStationarySince > 2000 &&
+    !this.playing.mouseInControls &&
+    !this.playing.isPaused &&
+    this.playing.location === 'local' &&
+    this.playing.playbackRate === 1
+}
+
+function load (cb) {
   appConfig.read(function (err, saved) {
     if (err || !saved.version) {
       console.log('Missing config file: Creating new one')
-      setupSavedState(onSaved)
+      setupStateSaved(onSavedState)
     } else {
-      onSaved(null, saved)
+      onSavedState(null, saved)
     }
   })
 
-  function onSaved (err, saved) {
+  function onSavedState (err, saved) {
     if (err) return cb(err)
+    const state = getDefaultState()
     state.saved = saved
-    migrations.run(state)
+
+    if (process.type === 'renderer') {
+      // Perf optimization: Save require() calls in the main process
+      const migrations = require('./migrations')
+      migrations.run(state)
+    }
+
     cb(null, state)
   }
 }
 
 // Write state.saved to the JSON state file
-function save (state, cb) {
+function saveImmediate (state, cb) {
   console.log('Saving state to ' + appConfig.filePath)
-  delete state.saveStateTimeout
 
   // Clean up, so that we're not saving any pending state
-  var copy = Object.assign({}, state.saved)
+  const copy = Object.assign({}, state.saved)
   // Remove torrents pending addition to the list, where we haven't finished
   // reading the torrent file or file(s) to seed & don't have an infohash
   copy.torrents = copy.torrents
     .filter((x) => x.infoHash)
     .map(function (x) {
-      var torrent = {}
-      for (var key in x) {
+      const torrent = {}
+      for (let key in x) {
         if (key === 'progress' || key === 'torrentKey') {
           continue // Don't save progress info or key for the webtorrent process
         }
-        if (key === 'playStatus') {
-          continue // Don't save whether a torrent is playing / pending
-        }
         if (key === 'error') {
           continue // Don't save error states
         }
@@ -217,15 +249,6 @@ function save (state, cb) {
 
   appConfig.write(copy, (err) => {
     if (err) console.error(err)
-    else State.emit('savedState')
+    else State.emit('stateSaved')
   })
 }
-
-// Write, but no more than once a second
-function saveThrottled (state) {
-  if (state.saveStateTimeout) return
-  state.saveStateTimeout = setTimeout(function () {
-    if (!state.saveStateTimeout) return
-    save(state)
-  }, 1000)
-}

src/renderer/lib/telemetry.js

@@ -2,44 +2,62 @@
 // Reports back so that we can improve WebTorrent Desktop
 module.exports = {
   init,
+  send,
   logUncaughtError,
   logPlayAttempt
 }
 
-const crypto = require('crypto')
 const electron = require('electron')
-const https = require('https')
-const os = require('os')
-const url = require('url')
 
 const config = require('../../config')
 
-var telemetry
+let telemetry
 
 function init (state) {
   telemetry = state.saved.telemetry
+
+  // First app run
   if (!telemetry) {
-    telemetry = state.saved.telemetry = createSummary()
+    const crypto = require('crypto')
+    telemetry = state.saved.telemetry = {
+      userID: crypto.randomBytes(32).toString('hex') // 256-bit random ID
+    }
     reset()
   }
+}
 
-  var now = new Date()
+function send (state) {
+  const now = new Date()
   telemetry.version = config.APP_VERSION
   telemetry.timestamp = now.toISOString()
   telemetry.localTime = now.toTimeString()
   telemetry.screens = getScreenInfo()
   telemetry.system = getSystemInfo()
-  telemetry.approxNumTorrents = getApproxNumTorrents(state)
+  telemetry.torrentStats = getTorrentStats(state)
+  telemetry.approxNumTorrents = telemetry.torrentStats.approxCount
 
-  if (config.IS_PRODUCTION) {
-    postToServer()
-    // If the user keeps WebTorrent running for a long time, post every 12h
-    setInterval(postToServer, 12 * 3600 * 1000)
-  } else {
+  if (!config.IS_PRODUCTION) {
     // Development: telemetry used only for local debugging
     // Empty uncaught errors, etc at the start of every run
-    reset()
+    return reset()
   }
+
+  const get = require('simple-get')
+
+  const opts = {
+    url: config.TELEMETRY_URL,
+    body: telemetry,
+    json: true
+  }
+
+  get.post(opts, function (err, res) {
+    if (err) return console.error('Error sending telemetry', err)
+    if (res.statusCode !== 200) {
+      return console.error(`Error sending telemetry, status code: ${res.statusCode}`)
+    }
+    console.log('Sent telemetry')
+    reset()
+  })
 }
 
 function reset () {
@@ -48,47 +66,12 @@ function reset () {
     minVersion: config.APP_VERSION,
     total: 0,
     success: 0,
-    timeout: 0,
     error: 0,
+    external: 0,
     abandoned: 0
   }
 }
 
-function postToServer () {
-  // Serialize the telemetry summary
-  var payload = new Buffer(JSON.stringify(telemetry), 'utf8')
-
-  // POST to our server
-  var options = url.parse(config.TELEMETRY_URL)
-  options.method = 'POST'
-  options.headers = {
-    'Content-Type': 'application/json',
-    'Content-Length': payload.length
-  }
-
-  var req = https.request(options, function (res) {
-    if (res.statusCode === 200) {
-      console.log('Successfully posted telemetry summary')
-      reset()
-    } else {
-      console.error('Couldn\'t post telemetry summary, got HTTP ' + res.statusCode)
-    }
-  })
-  req.on('error', function (e) {
-    console.error('Couldn\'t post telemetry summary', e)
-  })
-  req.write(payload)
-  req.end()
-}
-
-// Creates a new telemetry summary. Gives the user a unique ID,
-// collects screen resolution, etc
-function createSummary () {
-  // Make a 256-bit random unique ID
-  var userID = crypto.randomBytes(32).toString('hex')
-  return { userID }
-}
-
 // Track screen resolution
 function getScreenInfo () {
   return electron.screen.getAllDisplays().map((screen) => ({
@@ -100,22 +83,69 @@ function getScreenInfo () {
 
 // Track basic system info like OS version and amount of RAM
 function getSystemInfo () {
+  const os = require('os')
   return {
     osPlatform: process.platform,
     osRelease: os.type() + ' ' + os.release(),
     architecture: os.arch(),
-    totalMemoryMB: os.totalmem() / (1 << 20),
+    systemArchitecture: config.OS_SYSARCH,
+    totalMemoryMB: roundPow2(os.totalmem() / (1 << 20)),
     numCores: os.cpus().length
   }
 }
 
-// Get the number of torrents, rounded to the nearest power of two
-function getApproxNumTorrents (state) {
-  var exactNum = state.saved.torrents.length
-  if (exactNum === 0) return 0
+// Get stats like the # of torrents currently active, # in list, total size
+function getTorrentStats (state) {
+  const count = state.saved.torrents.length
+  let sizeMB = 0
+  let byStatus = {
+    new: { count: 0, sizeMB: 0 },
+    downloading: { count: 0, sizeMB: 0 },
+    seeding: { count: 0, sizeMB: 0 },
+    paused: { count: 0, sizeMB: 0 }
+  }
+
+  // First, count torrents & total file size
+  for (let i = 0; i < count; i++) {
+    const t = state.saved.torrents[i]
+    const stat = byStatus[t.status]
+    if (!t || !t.files || !stat) continue
+    stat.count++
+    for (let j = 0; j < t.files.length; j++) {
+      const f = t.files[j]
+      if (!f || !f.length) continue
+      const fileSizeMB = f.length / (1 << 20)
+      sizeMB += fileSizeMB
+      stat.sizeMB += fileSizeMB
+    }
+  }
+
+  // Then, round all the counts and sums to the nearest power of 2
+  const ret = roundTorrentStats({count, sizeMB})
+  ret.byStatus = {
+    new: roundTorrentStats(byStatus.new),
+    downloading: roundTorrentStats(byStatus.downloading),
+    seeding: roundTorrentStats(byStatus.seeding),
+    paused: roundTorrentStats(byStatus.paused)
+  }
+  return ret
+}
+
+function roundTorrentStats (stats) {
+  return {
+    approxCount: roundPow2(stats.count),
+    approxSizeMB: roundPow2(stats.sizeMB)
+  }
+}
+
+// Rounds to the nearest power of 2, for privacy and easy bucketing.
+// Rounds 35 to 32, 70 to 64, 5 to 4, 1 to 1, 0 to 0.
+// Supports nonnegative numbers only.
+function roundPow2 (n) {
+  if (n <= 0) return 0
   // Otherwise, return 1, 2, 4, 8, etc by rounding in log space
-  var log2 = Math.log(exactNum) / Math.log(2)
-  return 1 << Math.round(log2)
+  const log2 = Math.log(n) / Math.log(2)
+  return Math.pow(2, Math.round(log2))
 }
 
 // An uncaught error happened in the main process or in one of the windows
@@ -124,12 +154,10 @@ function logUncaughtError (procName, e) {
   // Hopefully uncaught errors immediately on startup are fixed in dev
   if (!telemetry) return
 
-  var message
-  var stack = ''
-  if (e.message) {
-    // err is either an Error or a plain object {message, stack}
-    message = e.message
-    stack = e.stack
+  let message
+  let stack = ''
+  if (e == null) {
+    message = 'Unexpected undefined error'
   } else if (e.error) {
     // Uncaught Javascript errors (window.onerror), err is an ErrorEvent
     if (!e.error.message) {
@@ -138,6 +166,10 @@ function logUncaughtError (procName, e) {
       message = e.error.message
       stack = e.error.stack
     }
+  } else if (e.message) {
+    // err is either an Error or a plain object {message, stack}
+    message = e.message
+    stack = e.stack
   } else {
     // Resource errors (captured element.onerror), err is an Event
     if (!e.target) {
@@ -149,11 +181,14 @@ function logUncaughtError (procName, e) {
     }
   }
 
+  if (typeof stack !== 'string') stack = 'Unexpected stack: ' + stack
+  if (typeof message !== 'string') message = 'Unexpected message: ' + message
+
   // Remove the first part of each file path in the stack trace.
   // - Privacy: remove personal info like C:\Users\<full name>
   // - Aggregation: this lets us find which stacktraces occur often
-  if (stack && typeof stack === 'string') stack = stack.replace(/\(.*app.asar/g, '(...')
-  else if (stack) stack = 'Unexpected stack: ' + stack
+  stack = stack.replace(/\(.*app.asar/g, '(...')
+  stack = stack.replace(/at .*app.asar/g, 'at ...')
 
   // We need to POST the telemetry object, make sure it stays < 100kb
   if (telemetry.uncaughtErrors.length > 20) return
@@ -161,28 +196,28 @@ function logUncaughtError (procName, e) {
   if (stack.length > 1000) stack = stack.substring(0, 1000)
 
   // Log the app version *at the time of the error*
-  var version = config.APP_VERSION
+  const version = config.APP_VERSION
 
   telemetry.uncaughtErrors.push({process: procName, message, stack, version})
 }
 
 // Turns a DOM element into a string, eg "DIV.my-class.visible"
 function getElemString (elem) {
-  var ret = elem.tagName
+  let ret = elem.tagName
   try {
     ret += '.' + Array.from(elem.classList).join('.')
-  } catch (e) {}
+  } catch (err) {}
   return ret
 }
 
-// The user pressed play. It either worked, timed out, or showed the
-// 'Play in VLC' codec error
+// The user pressed play. Did it work, display an error,
+// open an external player or did user abandon the attempt?
 function logPlayAttempt (result) {
-  if (!['success', 'timeout', 'error', 'abandoned'].includes(result)) {
+  if (!['success', 'error', 'external', 'abandoned'].includes(result)) {
     return console.error('Unknown play attempt result', result)
   }
 
-  var attempts = telemetry.playAttempts
+  const attempts = telemetry.playAttempts
   attempts.total = (attempts.total || 0) + 1
   attempts[result] = (attempts[result] || 0) + 1
 }

src/renderer/lib/torrent-player.js

@@ -3,11 +3,10 @@ module.exports = {
   isVideo,
   isAudio,
   isTorrent,
-  isPlayableTorrentSummary,
-  pickFileToPlay
+  isPlayableTorrentSummary
 }
 
-var path = require('path')
+const path = require('path')
 
 // Checks whether a fileSummary or file path is audio/video that we can play,
 // based on the file extension
@@ -38,6 +37,7 @@ function isAudio (file) {
     '.mp3',
     '.ogg',
     '.wav',
+    '.flac',
     '.m4a'
   ].includes(getFileExtension(file))
 }
@@ -47,38 +47,16 @@ function isAudio (file) {
 // - a file object where obj.name is ends in .torrent
 // - a string that's a magnet link (magnet://...)
 function isTorrent (file) {
-  var isTorrentFile = getFileExtension(file) === '.torrent'
-  var isMagnet = typeof file === 'string' && /^(stream-)?magnet:/.test(file)
+  const isTorrentFile = getFileExtension(file) === '.torrent'
+  const isMagnet = typeof file === 'string' && /^(stream-)?magnet:/.test(file)
   return isTorrentFile || isMagnet
 }
 
 function getFileExtension (file) {
-  var name = typeof file === 'string' ? file : file.name
+  const name = typeof file === 'string' ? file : file.name
   return path.extname(name).toLowerCase()
 }
 
 function isPlayableTorrentSummary (torrentSummary) {
   return torrentSummary.files && torrentSummary.files.some(isPlayable)
 }
-
-// Picks the default file to play from a list of torrent or torrentSummary files
-// Returns an index or undefined, if no files are playable
-function pickFileToPlay (files) {
-  // first, try to find the biggest video file
-  var videoFiles = files.filter(isVideo)
-  if (videoFiles.length > 0) {
-    var largestVideoFile = videoFiles.reduce(function (a, b) {
-      return a.length > b.length ? a : b
-    })
-    return files.indexOf(largestVideoFile)
-  }
-
-  // if there are no videos, play the first audio file
-  var audioFiles = files.filter(isAudio)
-  if (audioFiles.length > 0) {
-    return files.indexOf(audioFiles[0])
-  }
-
-  // no video or audio means nothing is playable
-  return undefined
-}

src/renderer/lib/torrent-poster.js

@@ -1,22 +1,22 @@
 module.exports = torrentPoster
 
-var captureVideoFrame = require('./capture-video-frame')
-var path = require('path')
+const captureFrame = require('capture-frame')
+const path = require('path')
 
 function torrentPoster (torrent, cb) {
   // First, try to use a poster image if available
-  var posterFile = torrent.files.filter(function (file) {
+  const posterFile = torrent.files.filter(function (file) {
     return /^poster\.(jpg|png|gif)$/.test(file.name)
   })[0]
   if (posterFile) return torrentPosterFromImage(posterFile, torrent, cb)
 
   // Second, try to use the largest video file
   // Filter out file formats that the <video> tag definitely can't play
-  var videoFile = getLargestFileByExtension(torrent, ['.mp4', '.m4v', '.webm', '.mov', '.mkv'])
+  const videoFile = getLargestFileByExtension(torrent, ['.mp4', '.m4v', '.webm', '.mov', '.mkv'])
   if (videoFile) return torrentPosterFromVideo(videoFile, torrent, cb)
 
   // Third, try to use the largest image file
-  var imgFile = getLargestFileByExtension(torrent, ['.gif', '.jpg', '.jpeg', '.png'])
+  const imgFile = getLargestFileByExtension(torrent, ['.gif', '.jpg', '.jpeg', '.png'])
   if (imgFile) return torrentPosterFromImage(imgFile, torrent, cb)
 
   // TODO: generate a waveform from the largest sound file
@@ -25,8 +25,8 @@ function torrentPoster (torrent, cb) {
 }
 
 function getLargestFileByExtension (torrent, extensions) {
-  var files = torrent.files.filter(function (file) {
-    var extname = path.extname(file.name).toLowerCase()
+  const files = torrent.files.filter(function (file) {
+    const extname = path.extname(file.name).toLowerCase()
     return extensions.indexOf(extname) !== -1
   })
   if (files.length === 0) return undefined
@@ -36,15 +36,15 @@ function getLargestFileByExtension (torrent, extensions) {
 }
 
 function torrentPosterFromVideo (file, torrent, cb) {
-  var index = torrent.files.indexOf(file)
+  const index = torrent.files.indexOf(file)
 
-  var server = torrent.createServer(0)
+  const server = torrent.createServer(0)
   server.listen(0, onListening)
 
   function onListening () {
-    var port = server.address().port
-    var url = 'http://localhost:' + port + '/' + index
-    var video = document.createElement('video')
+    const port = server.address().port
+    const url = 'http://localhost:' + port + '/' + index
+    const video = document.createElement('video')
     video.addEventListener('canplay', onCanPlay)
 
     video.volume = 0
@@ -61,7 +61,7 @@ function torrentPosterFromVideo (file, torrent, cb) {
     function onSeeked () {
       video.removeEventListener('seeked', onSeeked)
 
-      var buf = captureVideoFrame(video)
+      const buf = captureFrame(video)
 
       // unload video element
       video.pause()
@@ -78,6 +78,6 @@ function torrentPosterFromVideo (file, torrent, cb) {
 }
 
 function torrentPosterFromImage (file, torrent, cb) {
-  var extname = path.extname(file.name)
+  const extname = path.extname(file.name)
   file.getBuffer((err, buf) => cb(err, buf, extname))
 }

src/renderer/lib/torrent-summary.js

@@ -2,12 +2,12 @@ module.exports = {
   getPosterPath,
   getTorrentPath,
   getByKey,
-  getTorrentID,
+  getTorrentId,
   getFileOrFolder
 }
 
-var path = require('path')
-var config = require('../../config')
+const path = require('path')
+const config = require('../../config')
 
 // Expects a torrentSummary
 // Returns an absolute path to the torrent file, or null if unavailable
@@ -20,7 +20,7 @@ function getTorrentPath (torrentSummary) {
 // Returns an absolute path to the poster image, or null if unavailable
 function getPosterPath (torrentSummary) {
   if (!torrentSummary || !torrentSummary.posterFileName) return null
-  var posterPath = path.join(config.POSTER_PATH, torrentSummary.posterFileName)
+  const posterPath = path.join(config.POSTER_PATH, torrentSummary.posterFileName)
   // Work around a Chrome bug (reproduced in vanilla Chrome, not just Electron):
   // Backslashes in URLS in CSS cause bizarre string encoding issues
   return posterPath.replace(/\\/g, '/')
@@ -28,8 +28,8 @@ function getPosterPath (torrentSummary) {
 
 // Expects a torrentSummary
 // Returns a torrentID: filename, magnet URI, or infohash
-function getTorrentID (torrentSummary) {
-  var s = torrentSummary
+function getTorrentId (torrentSummary) {
+  const s = torrentSummary
   if (s.torrentFileName) { // Load torrent file from disk
     return getTorrentPath(s)
   } else { // Load torrent from DHT
@@ -51,7 +51,8 @@ function getByKey (state, torrentKey) {
 // TODO: make this assumption explicit, enforce it in the `create-torrent`
 // module. Store root folder explicitly to avoid hacky path processing below.
 function getFileOrFolder (torrentSummary) {
-  var ts = torrentSummary
+  const ts = torrentSummary
   if (!ts.path || !ts.files || ts.files.length === 0) return null
-  return path.join(ts.path, ts.files[0].path.split('/')[0])
+  const dirname = ts.files[0].path.split(path.sep)[0]
+  return path.join(ts.path, dirname)
 }

src/renderer/main.js

@@ -1,8 +1,30 @@
+/**
+ * Perf optimization: Hook into require() to modify how certain modules load:
+ *
+ * - `inline-style-prefixer` (used by `material-ui`) takes ~40ms. It is not
+ *   actually used because auto-prefixing is disabled with
+ *   `darkBaseTheme.userAgent = false`. Return a fake object.
+ */
+let Module = require('module')
+const _require = Module.prototype.require
+Module.prototype.require = function (id) {
+  if (id === 'inline-style-prefixer') return {}
+  return _require.apply(this, arguments)
+}
+
 console.time('init')
 
 const crashReporter = require('../crash-reporter')
 crashReporter.init()
 
+// Perf optimization: Start asynchronously read on config file before all the
+// blocking require() calls below.
+
+const State = require('./lib/state')
+State.load(onState)
+
+const createGetter = require('fn-getter')
+const debounce = require('debounce')
 const dragDrop = require('drag-drop')
 const electron = require('electron')
 const fs = require('fs')
@@ -12,62 +34,84 @@ const ReactDOM = require('react-dom')
 const config = require('../config')
 const telemetry = require('./lib/telemetry')
 const sound = require('./lib/sound')
-const State = require('./lib/state')
 const TorrentPlayer = require('./lib/torrent-player')
 
+// Perf optimization: Needed immediately, so do not lazy load it below
+const TorrentListController = require('./controllers/torrent-list-controller')
+
 // Required by Material UI -- adds `onTouchTap` event
 require('react-tap-event-plugin')()
 
-const App = require('./pages/App')
+const App = require('./pages/app')
 
-const MediaController = require('./controllers/media-controller')
-const UpdateController = require('./controllers/update-controller')
-const PrefsController = require('./controllers/prefs-controller')
-const PlaybackController = require('./controllers/playback-controller')
-const SubtitlesController = require('./controllers/subtitles-controller')
-const TorrentListController = require('./controllers/torrent-list-controller')
-const TorrentController = require('./controllers/torrent-controller')
+// Electron apps have two processes: a main process (node) runs first and starts
+// a renderer process (essentially a Chrome window). We're in the renderer process,
+// and this IPC channel receives from and sends messages to the main process
+const ipcRenderer = electron.ipcRenderer
 
 // Yo-yo pattern: state object lives here and percolates down thru all the views.
 // Events come back up from the views via dispatch(...)
 require('./lib/dispatcher').setDispatch(dispatch)
 
 // From dispatch(...), events are sent to one of the controllers
-var controllers = null
+let controllers = null
 
 // This dependency is the slowest-loading, so we lazy load it
-var Cast = null
-
-// Electron apps have two processes: a main process (node) runs first and starts
-// a renderer process (essentially a Chrome window). We're in the renderer process,
-// and this IPC channel receives from and sends messages to the main process
-var ipcRenderer = electron.ipcRenderer
+let Cast = null
 
 // All state lives in state.js. `state.saved` is read from and written to a file.
 // All other state is ephemeral. First we load state.saved then initialize the app.
-var state
+let state
 
 // Root React component
-var app
-
-State.load(onState)
+let app
 
 // Called once when the application loads. (Not once per window.)
 // Connects to the torrent networks, sets up the UI and OS integrations like
 // the dock icon and drag+drop.
 function onState (err, _state) {
   if (err) return onError(err)
-  state = window.state = _state // Make available for easier debugging
+
+  // Make available for easier debugging
+  state = window.state = _state
+  window.dispatch = dispatch
+
+  telemetry.init(state)
+
+  // Log uncaught JS errors
+  window.addEventListener(
+    'error', (e) => telemetry.logUncaughtError('window', e), true /* capture */
+  )
 
   // Create controllers
   controllers = {
-    media: new MediaController(state),
-    update: new UpdateController(state),
-    prefs: new PrefsController(state, config),
-    playback: new PlaybackController(state, config, update),
-    subtitles: new SubtitlesController(state),
-    torrentList: new TorrentListController(state),
-    torrent: new TorrentController(state)
+    media: createGetter(() => {
+      const MediaController = require('./controllers/media-controller')
+      return new MediaController(state)
+    }),
+    playback: createGetter(() => {
+      const PlaybackController = require('./controllers/playback-controller')
+      return new PlaybackController(state, config, update)
+    }),
+    prefs: createGetter(() => {
+      const PrefsController = require('./controllers/prefs-controller')
+      return new PrefsController(state, config)
+    }),
+    subtitles: createGetter(() => {
+      const SubtitlesController = require('./controllers/subtitles-controller')
+      return new SubtitlesController(state)
+    }),
+    torrent: createGetter(() => {
+      const TorrentController = require('./controllers/torrent-controller')
+      return new TorrentController(state)
+    }),
+    torrentList: createGetter(() => {
+      return new TorrentListController(state)
+    }),
+    update: createGetter(() => {
+      const UpdateController = require('./controllers/update-controller')
+      return new UpdateController(state)
+    })
   }
 
   // Add first page to location history
@@ -82,23 +126,18 @@ function onState (err, _state) {
   // Restart everything we were torrenting last time the app ran
   resumeTorrents()
 
+  // Initialize ReactDOM
+  app = ReactDOM.render(<App state={state} />, document.querySelector('#body'))
+
   // Calling update() updates the UI given the current state
   // Do this at least once a second to give every file in every torrentSummary
   // a progress bar and to keep the cursor in sync when playing a video
   setInterval(update, 1000)
-  app = ReactDOM.render(<App state={state} />, document.querySelector('#body'))
-
-  // Lazy-load other stuff, like the AppleTV module, later to keep startup fast
-  window.setTimeout(delayedInit, config.DELAYED_INIT)
 
   // Listen for messages from the main process
   setupIpc()
 
-  // Warn if the download dir is gone, eg b/c an external drive is unplugged
-  checkDownloadPath()
-
-  // OS integrations:
-  // ...drag and drop files/text to start torrenting or seeding
+  // Drag and drop files/text to start torrenting or seeding
   dragDrop('body', {
     onDrop: onOpen,
     onDropText: onOpen
@@ -107,28 +146,49 @@ function onState (err, _state) {
   // ...same thing if you paste a torrent
   document.addEventListener('paste', onPaste)
 
+  const debouncedFullscreenToggle = debounce(function () {
+    dispatch('toggleFullScreen')
+  }, 1000, true)
+
+  document.addEventListener('wheel', function (event) {
+    // ctrlKey detects pinch to zoom, http://crbug.com/289887
+    if (event.ctrlKey) {
+      event.preventDefault()
+      debouncedFullscreenToggle()
+    }
+  })
+
   // ...focus and blur. Needed to show correct dock icon text ('badge') in OSX
   window.addEventListener('focus', onFocus)
   window.addEventListener('blur', onBlur)
 
-  // ...window visibility state.
-  document.addEventListener('webkitvisibilitychange', onVisibilityChange)
+  if (electron.remote.getCurrentWindow().isVisible()) {
+    sound.play('STARTUP')
+  }
 
-  // Log uncaught JS errors
-  window.addEventListener('error',
-    (e) => telemetry.logUncaughtError('window', e),
-    true /* capture */)
+  // To keep app startup fast, some code is delayed.
+  window.setTimeout(delayedInit, config.DELAYED_INIT)
 
   // Done! Ideally we want to get here < 500ms after the user clicks the app
-  sound.play('STARTUP')
   console.timeEnd('init')
 }
 
 // Runs a few seconds after the app loads, to avoid slowing down startup time
 function delayedInit () {
+  telemetry.send(state)
+
+  // Send telemetry data every 12 hours, for users who keep the app running
+  // for extended periods of time
+  setInterval(() => telemetry.send(state), 12 * 3600 * 1000)
+
+  // Warn if the download dir is gone, eg b/c an external drive is unplugged
+  checkDownloadPath()
+
+  // ...window visibility state.
+  document.addEventListener('webkitvisibilitychange', onVisibilityChange)
+  onVisibilityChange()
+
   lazyLoadCast()
-  sound.preload()
-  telemetry.init(state)
 }
 
 // Lazily loads Chromecast and Airplay support
@@ -146,7 +206,7 @@ function lazyLoadCast () {
 // 3. dispatch - the event handler calls dispatch(), main.js sends it to a controller
 // 4. controller - the controller handles the event, changing the state object
 function update () {
-  controllers.playback.showOrHidePlayerControls()
+  controllers.playback().showOrHidePlayerControls()
   app.setState(state)
   updateElectron()
 }
@@ -174,44 +234,58 @@ const dispatchHandlers = {
   'openFiles': () => ipcRenderer.send('openFiles'), /* shows the open file dialog */
   'openTorrentAddress': () => { state.modal = { id: 'open-torrent-address-modal' } },
 
-  'addTorrent': (torrentId) => controllers.torrentList.addTorrent(torrentId),
-  'showCreateTorrent': (paths) => controllers.torrentList.showCreateTorrent(paths),
-  'createTorrent': (options) => controllers.torrentList.createTorrent(options),
-  'toggleTorrent': (infoHash) => controllers.torrentList.toggleTorrent(infoHash),
-  'toggleTorrentFile': (infoHash, index) => controllers.torrentList.toggleTorrentFile(infoHash, index),
-  'confirmDeleteTorrent': (infoHash, deleteData) => controllers.torrentList.confirmDeleteTorrent(infoHash, deleteData),
-  'deleteTorrent': (infoHash, deleteData) => controllers.torrentList.deleteTorrent(infoHash, deleteData),
-  'toggleSelectTorrent': (infoHash) => controllers.torrentList.toggleSelectTorrent(infoHash),
-  'openTorrentContextMenu': (infoHash) => controllers.torrentList.openTorrentContextMenu(infoHash),
-  'startTorrentingSummary': (torrentKey) => controllers.torrentList.startTorrentingSummary(torrentKey),
-  'pauseAllTorrents': (params) => controllers.torrentList.pauseAll(params),
-  'resumePausedTorrents': () => controllers.torrentList.resumePausedTorrents(),
+  'addTorrent': (torrentId) => controllers.torrentList().addTorrent(torrentId),
+  'showCreateTorrent': (paths) => controllers.torrentList().showCreateTorrent(paths),
+  'createTorrent': (options) => controllers.torrentList().createTorrent(options),
+  'toggleTorrent': (infoHash) => controllers.torrentList().toggleTorrent(infoHash),
+  'pauseAllTorrents': () => controllers.torrentList().pauseAllTorrents(),
+  'resumeAllTorrents': () => controllers.torrentList().resumeAllTorrents(),
+  'toggleTorrentFile': (infoHash, index) =>
+    controllers.torrentList().toggleTorrentFile(infoHash, index),
+  'confirmDeleteTorrent': (infoHash, deleteData) =>
+    controllers.torrentList().confirmDeleteTorrent(infoHash, deleteData),
+  'deleteTorrent': (infoHash, deleteData) =>
+    controllers.torrentList().deleteTorrent(infoHash, deleteData),
+  'toggleSelectTorrent': (infoHash) =>
+    controllers.torrentList().toggleSelectTorrent(infoHash),
+  'openTorrentContextMenu': (infoHash) =>
+    controllers.torrentList().openTorrentContextMenu(infoHash),
+  'startTorrentingSummary': (torrentKey) =>
+    controllers.torrentList().startTorrentingSummary(torrentKey),
+  'saveTorrentFileAs': (torrentKey) =>
+    controllers.torrentList().saveTorrentFileAs(torrentKey),
+  'prioritizeTorrent': (infoHash) => controllers.torrentList().prioritizeTorrent(infoHash),
+  'resumePausedTorrents': () => controllers.torrentList().resumePausedTorrents(),
 
   // Playback
-  'playFile': (infoHash, index) => controllers.playback.playFile(infoHash, index),
-  'playPause': () => controllers.playback.playPause(),
-  'skip': (time) => controllers.playback.skip(time),
-  'skipTo': (time) => controllers.playback.skipTo(time),
-  'changePlaybackRate': (dir) => controllers.playback.changePlaybackRate(dir),
-  'changeVolume': (delta) => controllers.playback.changeVolume(delta),
-  'setVolume': (vol) => controllers.playback.setVolume(vol),
-  'openItem': (infoHash, index) => controllers.playback.openItem(infoHash, index),
+  'playFile': (infoHash, index) => controllers.playback().playFile(infoHash, index),
+  'playPause': () => controllers.playback().playPause(),
+  'nextTrack': () => controllers.playback().nextTrack(),
+  'previousTrack': () => controllers.playback().previousTrack(),
+  'skip': (time) => controllers.playback().skip(time),
+  'skipTo': (time) => controllers.playback().skipTo(time),
+  'changePlaybackRate': (dir) => controllers.playback().changePlaybackRate(dir),
+  'changeVolume': (delta) => controllers.playback().changeVolume(delta),
+  'setVolume': (vol) => controllers.playback().setVolume(vol),
+  'openItem': (infoHash, index) => controllers.playback().openItem(infoHash, index),
 
   // Subtitles
-  'openSubtitles': () => controllers.subtitles.openSubtitles(),
-  'selectSubtitle': (index) => controllers.subtitles.selectSubtitle(index),
-  'toggleSubtitlesMenu': () => controllers.subtitles.toggleSubtitlesMenu(),
-  'checkForSubtitles': () => controllers.subtitles.checkForSubtitles(),
-  'addSubtitles': (files, autoSelect) => controllers.subtitles.addSubtitles(files, autoSelect),
+  'openSubtitles': () => controllers.subtitles().openSubtitles(),
+  'selectSubtitle': (index) => controllers.subtitles().selectSubtitle(index),
+  'toggleSubtitlesMenu': () => controllers.subtitles().toggleSubtitlesMenu(),
+  'checkForSubtitles': () => controllers.subtitles().checkForSubtitles(),
+  'addSubtitles': (files, autoSelect) => controllers.subtitles().addSubtitles(files, autoSelect),
 
   // Local media: <video>, <audio>, external players
-  'mediaStalled': () => controllers.media.mediaStalled(),
-  'mediaError': (err) => controllers.media.mediaError(err),
-  'mediaSuccess': () => controllers.media.mediaSuccess(),
-  'mediaTimeUpdate': () => controllers.media.mediaTimeUpdate(),
-  'mediaMouseMoved': () => controllers.media.mediaMouseMoved(),
-  'openExternalPlayer': () => controllers.media.openExternalPlayer(),
-  'externalPlayerNotFound': () => controllers.media.externalPlayerNotFound(),
+  'mediaStalled': () => controllers.media().mediaStalled(),
+  'mediaError': (err) => controllers.media().mediaError(err),
+  'mediaSuccess': () => controllers.media().mediaSuccess(),
+  'mediaTimeUpdate': () => controllers.media().mediaTimeUpdate(),
+  'mediaMouseMoved': () => controllers.media().mediaMouseMoved(),
+  'mediaControlsMouseEnter': () => controllers.media().controlsMouseEnter(),
+  'mediaControlsMouseLeave': () => controllers.media().controlsMouseLeave(),
+  'openExternalPlayer': () => controllers.media().openExternalPlayer(),
+  'externalPlayerNotFound': () => controllers.media().externalPlayerNotFound(),
 
   // Remote casting: Chromecast, Airplay, etc
   'toggleCastMenu': (deviceType) => lazyLoadCast().toggleMenu(deviceType),
@@ -219,13 +293,13 @@ const dispatchHandlers = {
   'stopCasting': () => lazyLoadCast().stop(),
 
   // Preferences screen
-  'preferences': () => controllers.prefs.show(),
-  'updatePreferences': (key, value) => controllers.prefs.update(key, value),
+  'preferences': () => controllers.prefs().show(),
+  'updatePreferences': (key, value) => controllers.prefs().update(key, value),
   'checkDownloadPath': checkDownloadPath,
 
   // Update (check for new versions on Linux, where there's no auto updater)
-  'updateAvailable': (version) => controllers.update.updateAvailable(version),
-  'skipVersion': (version) => controllers.update.skipVersion(version),
+  'updateAvailable': (version) => controllers.update().updateAvailable(version),
+  'skipVersion': (version) => controllers.update().skipVersion(version),
 
   // Navigation between screens (back, forward, ESC, etc)
   'exitModal': () => { state.modal = null },
@@ -245,8 +319,8 @@ const dispatchHandlers = {
   'onOpen': onOpen,
   'error': onError,
   'uncaughtError': (proc, err) => telemetry.logUncaughtError(proc, err),
-  'saveState': () => State.save(state),
-  'saveStateThrottled': () => State.saveThrottled(state),
+  'stateSave': () => State.save(state),
+  'stateSaveImmediate': () => State.saveImmediate(state),
   'update': () => {} // No-op, just trigger an update
 }
 
@@ -257,13 +331,13 @@ function dispatch (action, ...args) {
     console.log('dispatch: %s %o', action, args)
   }
 
-  var handler = dispatchHandlers[action]
+  const handler = dispatchHandlers[action]
   if (handler) handler(...args)
   else console.error('Missing dispatch handler: ' + action)
 
   // Update the virtual DOM, unless it's just a mouse move event
   if (action !== 'mediaMouseMoved' ||
-      controllers.playback.showOrHidePlayerControls()) {
+      controllers.playback().showOrHidePlayerControls()) {
     update()
   }
 }
@@ -276,8 +350,9 @@ function setupIpc () {
   ipcRenderer.on('dispatch', (e, ...args) => dispatch(...args))
 
   ipcRenderer.on('fullscreenChanged', onFullscreenChanged)
+  ipcRenderer.on('windowBoundsChanged', onWindowBoundsChanged)
 
-  var tc = controllers.torrent
+  const tc = controllers.torrent()
   ipcRenderer.on('wt-infohash', (e, ...args) => tc.torrentInfoHash(...args))
   ipcRenderer.on('wt-metadata', (e, ...args) => tc.torrentMetadata(...args))
   ipcRenderer.on('wt-done', (e, ...args) => tc.torrentDone(...args))
@@ -295,7 +370,7 @@ function setupIpc () {
 
   ipcRenderer.send('ipcReady')
 
-  State.on('savedState', () => ipcRenderer.send('savedState'))
+  State.on('stateSaved', () => ipcRenderer.send('stateSaved'))
 }
 
 // Quits any modal popovers and returns to the torrent list screen
@@ -304,7 +379,7 @@ function backToList () {
   state.modal = null
   state.location.backToFirst(function () {
     // If we were already on the torrent list, scroll to the top
-    var contentTag = document.querySelector('.content')
+    const contentTag = document.querySelector('.content')
     if (contentTag) contentTag.scrollTop = 0
   })
 }
@@ -330,7 +405,7 @@ function resumeTorrents () {
       return torrentSummary
     })
     .filter((s) => s.status !== 'paused')
-    .forEach((s) => controllers.torrentList.startTorrentingSummary(s.torrentKey))
+    .forEach((s) => controllers.torrentList().startTorrentingSummary(s.torrentKey))
 }
 
 // Set window dimensions to match video dimensions or fill the screen
@@ -351,18 +426,18 @@ function setDimensions (dimensions) {
   state.window.wasMaximized = electron.remote.getCurrentWindow().isMaximized
 
   // Limit window size to screen size
-  var screenWidth = window.screen.width
-  var screenHeight = window.screen.height
-  var aspectRatio = dimensions.width / dimensions.height
-  var scaleFactor = Math.min(
+  const screenWidth = window.screen.width
+  const screenHeight = window.screen.height
+  const aspectRatio = dimensions.width / dimensions.height
+  const scaleFactor = Math.min(
     Math.min(screenWidth / dimensions.width, 1),
     Math.min(screenHeight / dimensions.height, 1)
   )
-  var width = Math.max(
+  const width = Math.max(
     Math.floor(dimensions.width * scaleFactor),
     config.WINDOW_MIN_WIDTH
   )
-  var height = Math.max(
+  const height = Math.max(
     Math.floor(dimensions.height * scaleFactor),
     config.WINDOW_MIN_HEIGHT
   )
@@ -377,22 +452,22 @@ function setDimensions (dimensions) {
 function onOpen (files) {
   if (!Array.isArray(files)) files = [ files ]
 
-  var url = state.location.url()
-  var allTorrents = files.every(TorrentPlayer.isTorrent)
-  var allSubtitles = files.every(controllers.subtitles.isSubtitle)
+  const url = state.location.url()
+  const allTorrents = files.every(TorrentPlayer.isTorrent)
+  const allSubtitles = files.every(controllers.subtitles().isSubtitle)
 
   if (allTorrents) {
     // Drop torrents onto the app: go to home screen, add torrents, no matter what
     dispatch('backToList')
     // All .torrent files? Add them.
-    files.forEach((file) => controllers.torrentList.addTorrent(file))
+    files.forEach((file) => controllers.torrentList().addTorrent(file))
   } else if (url === 'player' && allSubtitles) {
     // Drop subtitles onto a playing video: add subtitles
-    controllers.subtitles.addSubtitles(files, true)
+    controllers.subtitles().addSubtitles(files, true)
   } else if (url === 'home') {
     // Drop files onto home screen: show Create Torrent
     state.modal = null
-    controllers.torrentList.showCreateTorrent(files)
+    controllers.torrentList().showCreateTorrent(files)
   } else {
     // Drop files onto any other screen: show error
     return onError('Please go back to the torrent list before creating a new torrent.')
@@ -412,15 +487,11 @@ function onError (err) {
   update()
 }
 
-function onPaste (e) {
-  if (e.target.tagName.toLowerCase() === 'input') return
+const editableHtmlTags = new Set(['input', 'textarea'])
 
-  var torrentIds = electron.clipboard.readText().split('\n')
-  torrentIds.forEach(function (torrentId) {
-    torrentId = torrentId.trim()
-    if (torrentId.length === 0) return
-    controllers.torrentList.addTorrent(torrentId)
-  })
+function onPaste (e) {
+  if (editableHtmlTags.has(e.target.tagName.toLowerCase())) return
+  controllers.torrentList().addTorrent(electron.clipboard.readText())
 
   update()
 }
@@ -450,6 +521,13 @@ function onFullscreenChanged (e, isFullScreen) {
   update()
 }
 
+function onWindowBoundsChanged (e, newBounds) {
+  if (state.location.url() !== 'player') {
+    state.saved.bounds = newBounds
+    dispatch('stateSave')
+  }
+}
+
 function checkDownloadPath () {
   fs.stat(state.saved.prefs.downloadPath, function (err, stat) {
     if (err) {

src/renderer/pages/App.js

@@ -1,111 +0,0 @@
-const colors = require('material-ui/styles/colors')
-const React = require('react')
-
-const darkBaseTheme = require('material-ui/styles/baseThemes/darkBaseTheme').default
-const getMuiTheme = require('material-ui/styles/getMuiTheme').default
-const MuiThemeProvider = require('material-ui/styles/MuiThemeProvider').default
-
-const Header = require('../components/Header')
-
-const Views = {
-  'home': require('./TorrentListPage'),
-  'player': require('./PlayerPage'),
-  'create-torrent': require('./CreateTorrentPage'),
-  'preferences': require('./PreferencesPage')
-}
-
-const Modals = {
-  'open-torrent-address-modal': require('../components/open-torrent-address-modal'),
-  'remove-torrent-modal': require('../components/remove-torrent-modal'),
-  'update-available-modal': require('../components/update-available-modal'),
-  'unsupported-media-modal': require('../components/unsupported-media-modal')
-}
-
-darkBaseTheme.fontFamily = process.platform === 'win32'
-  ? '"Segoe UI", sans-serif'
-  : 'BlinkMacSystemFont, "Helvetica Neue", Helvetica, sans-serif'
-darkBaseTheme.palette.primary1Color = colors.cyan500
-darkBaseTheme.palette.primary2Color = colors.cyan500
-darkBaseTheme.palette.primary3Color = colors.grey600
-darkBaseTheme.palette.accent1Color = colors.redA200
-darkBaseTheme.palette.accent2Color = colors.redA400
-darkBaseTheme.palette.accent3Color = colors.redA100
-
-class App extends React.Component {
-  render () {
-    var state = this.props.state
-
-    // Hide player controls while playing video, if the mouse stays still for a while
-    // Never hide the controls when:
-    // * The mouse is over the controls or we're scrubbing (see CSS)
-    // * The video is paused
-    // * The video is playing remotely on Chromecast or Airplay
-    var hideControls = state.location.url() === 'player' &&
-      state.playing.mouseStationarySince !== 0 &&
-      new Date().getTime() - state.playing.mouseStationarySince > 2000 &&
-      !state.playing.isPaused &&
-      state.playing.location === 'local' &&
-      state.playing.playbackRate === 1
-
-    var cls = [
-      'view-' + state.location.url(), /* e.g. view-home, view-player */
-      'is-' + process.platform /* e.g. is-darwin, is-win32, is-linux */
-    ]
-    if (state.window.isFullScreen) cls.push('is-fullscreen')
-    if (state.window.isFocused) cls.push('is-focused')
-    if (hideControls) cls.push('hide-video-controls')
-
-    var vdom = (
-      <MuiThemeProvider muiTheme={getMuiTheme(darkBaseTheme)}>
-        <div className={'app ' + cls.join(' ')}>
-          <Header state={state} />
-          {this.getErrorPopover()}
-          <div key='content' className='content'>{this.getView()}</div>
-          {this.getModal()}
-        </div>
-      </MuiThemeProvider>
-    )
-
-    return vdom
-  }
-
-  getErrorPopover () {
-    var state = this.props.state
-    var now = new Date().getTime()
-    var recentErrors = state.errors.filter((x) => now - x.time < 5000)
-    var hasErrors = recentErrors.length > 0
-
-    var errorElems = recentErrors.map(function (error, i) {
-      return (<div key={i} className='error'>{error.message}</div>)
-    })
-    return (
-      <div key='errors'
-        className={'error-popover ' + (hasErrors ? 'visible' : 'hidden')}>
-        <div key='title' className='title'>Error</div>
-        {errorElems}
-      </div>
-    )
-  }
-
-  getModal () {
-    var state = this.props.state
-    if (!state.modal) return
-    var ModalContents = Modals[state.modal.id]
-    return (
-      <div key='modal' className='modal'>
-        <div key='modal-background' className='modal-background' />
-        <div key='modal-content' className='modal-content'>
-          <ModalContents state={state} />
-        </div>
-      </div>
-    )
-  }
-
-  getView () {
-    var state = this.props.state
-    var View = Views[state.location.url()]
-    return (<View state={state} />)
-  }
-}
-
-module.exports = App

src/renderer/pages/CreateTorrentPage.js

@@ -1,171 +0,0 @@
-const createTorrent = require('create-torrent')
-const path = require('path')
-const prettyBytes = require('prettier-bytes')
-const React = require('react')
-
-const {dispatch, dispatcher} = require('../lib/dispatcher')
-
-const FlatButton = require('material-ui/FlatButton').default
-const RaisedButton = require('material-ui/RaisedButton').default
-const TextField = require('material-ui/TextField').default
-
-const CreateTorrentErrorPage = require('../components/create-torrent-error-page')
-const Heading = require('../components/Heading')
-const ShowMore = require('../components/ShowMore')
-
-class CreateTorrentPage extends React.Component {
-  constructor (props) {
-    super(props)
-
-    var state = this.props.state
-    var info = state.location.current()
-
-    // Preprocess: exclude .DS_Store and other dotfiles
-    var files = info.files
-      .filter((f) => !f.name.startsWith('.'))
-      .map((f) => ({name: f.name, path: f.path, size: f.size}))
-    if (files.length === 0) return (<CreateTorrentErrorPage state={state} />)
-
-    // First, extract the base folder that the files are all in
-    var pathPrefix = info.folderPath
-    if (!pathPrefix) {
-      pathPrefix = files.map((x) => x.path).reduce(findCommonPrefix)
-      if (!pathPrefix.endsWith('/') && !pathPrefix.endsWith('\\')) {
-        pathPrefix = path.dirname(pathPrefix)
-      }
-    }
-
-    // Sanity check: show the number of files and total size
-    var numFiles = files.length
-    var totalBytes = files
-      .map((f) => f.size)
-      .reduce((a, b) => a + b, 0)
-    var torrentInfo = `${numFiles} files, ${prettyBytes(totalBytes)}`
-
-    // Then, use the name of the base folder (or sole file, for a single file torrent)
-    // as the default name. Show all files relative to the base folder.
-    var defaultName, basePath
-    if (files.length === 1) {
-      // Single file torrent: /a/b/foo.jpg -> torrent name 'foo.jpg', path '/a/b'
-      defaultName = files[0].name
-      basePath = pathPrefix
-    } else {
-      // Multi file torrent: /a/b/{foo, bar}.jpg -> torrent name 'b', path '/a'
-      defaultName = path.basename(pathPrefix)
-      basePath = path.dirname(pathPrefix)
-    }
-    var maxFileElems = 100
-    var fileElems = files.slice(0, maxFileElems).map(function (file, i) {
-      var relativePath = files.length === 0 ? file.name : path.relative(pathPrefix, file.path)
-      return (<div key={i}>{relativePath}</div>)
-    })
-    if (files.length > maxFileElems) {
-      fileElems.push(<div key='more'>+ {maxFileElems - files.length} more</div>)
-    }
-    var trackers = createTorrent.announceList.join('\n')
-
-    this.state = {
-      basePath,
-      defaultName,
-      fileElems,
-      torrentInfo,
-      trackers
-    }
-  }
-
-  handleSubmit () {
-    var announceList = document.querySelector('.torrent-trackers').value
-      .split('\n')
-      .map((s) => s.trim())
-      .filter((s) => s !== '')
-    var isPrivate = document.querySelector('.torrent-is-private').checked
-    var comment = document.querySelector('.torrent-comment').value.trim()
-    var options = {
-      // We can't let the user choose their own name if we want WebTorrent
-      // to use the files in place rather than creating a new folder.
-      // If we ever want to add support for that:
-      // name: document.querySelector('.torrent-name').value
-      name: this.state.defaultName,
-      path: this.state.basePath,
-      files: this.state.files,
-      announce: announceList,
-      private: isPrivate,
-      comment: comment
-    }
-    dispatch('createTorrent', options)
-  }
-
-  render () {
-    return (
-      <div className='create-torrent'>
-        <Heading level={1}>
-          Create torrent "{this.state.defaultName}"
-        </Heading>
-        <div className='torrent-info'>
-          {this.state.torrentInfo}
-        </div>
-        <div className='torrent-attribute'>
-          <label>Path:</label>
-          <div className='torrent-attribute'>{this.state.pathPrefix}</div>
-        </div>
-        <ShowMore
-          style={{
-            marginBottom: 10
-          }}
-          hideLabel='Hide advanced settings...'
-          showLabel='Show advanced settings...'
-        >
-          <div key='advanced' className='create-torrent-advanced'>
-            <div key='private' className='torrent-attribute'>
-              <label>Private:</label>
-              <input type='checkbox' className='torrent-is-private' value='torrent-is-private' />
-            </div>
-            <Heading level={2}>Trackers:</Heading>
-            <TextField
-              className='torrent-trackers'
-              hintText='Tracker'
-              multiLine
-              rows={2}
-              rowsMax={10}
-              defaultValue={this.state.trackers}
-            />
-            <div key='comment' className='torrent-attribute'>
-              <label>Comment:</label>
-              <textarea className='torrent-attribute torrent-comment' />
-            </div>
-            <div key='files' className='torrent-attribute'>
-              <label>Files:</label>
-              <div>{this.state.fileElems}</div>
-            </div>
-          </div>
-        </ShowMore>
-        <div className='float-right'>
-          <FlatButton
-            label='Cancel'
-            style={{
-              marginRight: 10
-            }}
-            onClick={dispatcher('cancel')}
-          />
-          <RaisedButton
-            label='Create Torrent'
-            primary
-            onClick={this.handleSubmit}
-          />
-        </div>
-      </div>
-    )
-  }
-}
-
-// Finds the longest common prefix
-function findCommonPrefix (a, b) {
-  for (var i = 0; i < a.length && i < b.length; i++) {
-    if (a.charCodeAt(i) !== b.charCodeAt(i)) break
-  }
-  if (i === a.length) return a
-  if (i === b.length) return b
-  return a.substring(0, i)
-}
-
-module.exports = CreateTorrentPage

src/renderer/pages/app.js

@@ -0,0 +1,130 @@
+const colors = require('material-ui/styles/colors')
+const createGetter = require('fn-getter')
+const React = require('react')
+
+const darkBaseTheme = require('material-ui/styles/baseThemes/darkBaseTheme').default
+const getMuiTheme = require('material-ui/styles/getMuiTheme').default
+const MuiThemeProvider = require('material-ui/styles/MuiThemeProvider').default
+
+const Header = require('../components/header')
+
+// Perf optimization: Needed immediately, so do not lazy load it below
+const TorrentListPage = require('./torrent-list-page')
+
+const Views = {
+  'home': createGetter(() => TorrentListPage),
+  'player': createGetter(() => require('./player-page')),
+  'create-torrent': createGetter(() => require('./create-torrent-page')),
+  'preferences': createGetter(() => require('./preferences-page'))
+}
+
+const Modals = {
+  'open-torrent-address-modal': createGetter(
+    () => require('../components/open-torrent-address-modal')
+  ),
+  'remove-torrent-modal': createGetter(() => require('../components/remove-torrent-modal')),
+  'update-available-modal': createGetter(() => require('../components/update-available-modal')),
+  'unsupported-media-modal': createGetter(() => require('../components/unsupported-media-modal'))
+}
+
+const fontFamily = process.platform === 'win32'
+  ? '"Segoe UI", sans-serif'
+  : 'BlinkMacSystemFont, "Helvetica Neue", Helvetica, sans-serif'
+
+darkBaseTheme.fontFamily = fontFamily
+darkBaseTheme.userAgent = false
+darkBaseTheme.palette.primary1Color = colors.grey50
+darkBaseTheme.palette.primary2Color = colors.grey50
+darkBaseTheme.palette.primary3Color = colors.grey600
+darkBaseTheme.palette.accent1Color = colors.redA200
+darkBaseTheme.palette.accent2Color = colors.redA400
+darkBaseTheme.palette.accent3Color = colors.redA100
+
+let darkMuiTheme
+let lightMuiTheme
+
+class App extends React.Component {
+  render () {
+    const state = this.props.state
+
+    // Hide player controls while playing video, if the mouse stays still for a while
+    // Never hide the controls when:
+    // * The mouse is over the controls or we're scrubbing (see CSS)
+    // * The video is paused
+    // * The video is playing remotely on Chromecast or Airplay
+    const hideControls = state.shouldHidePlayerControls()
+
+    const cls = [
+      'view-' + state.location.url(), /* e.g. view-home, view-player */
+      'is-' + process.platform /* e.g. is-darwin, is-win32, is-linux */
+    ]
+    if (state.window.isFullScreen) cls.push('is-fullscreen')
+    if (state.window.isFocused) cls.push('is-focused')
+    if (hideControls) cls.push('hide-video-controls')
+
+    if (!darkMuiTheme) {
+      darkMuiTheme = getMuiTheme(darkBaseTheme)
+    }
+
+    return (
+      <MuiThemeProvider muiTheme={darkMuiTheme}>
+        <div className={'app ' + cls.join(' ')}>
+          <Header state={state} />
+          {this.getErrorPopover()}
+          <div key='content' className='content'>{this.getView()}</div>
+          {this.getModal()}
+        </div>
+      </MuiThemeProvider>
+    )
+  }
+
+  getErrorPopover () {
+    const state = this.props.state
+    const now = new Date().getTime()
+    const recentErrors = state.errors.filter((x) => now - x.time < 5000)
+    const hasErrors = recentErrors.length > 0
+
+    const errorElems = recentErrors.map(function (error, i) {
+      return (<div key={i} className='error'>{error.message}</div>)
+    })
+    return (
+      <div key='errors'
+        className={'error-popover ' + (hasErrors ? 'visible' : 'hidden')}>
+        <div key='title' className='title'>Error</div>
+        {errorElems}
+      </div>
+    )
+  }
+
+  getModal () {
+    const state = this.props.state
+    if (!state.modal) return
+
+    if (!lightMuiTheme) {
+      const lightBaseTheme = require('material-ui/styles/baseThemes/lightBaseTheme').default
+      lightBaseTheme.fontFamily = fontFamily
+      lightBaseTheme.userAgent = false
+      lightMuiTheme = getMuiTheme(lightBaseTheme)
+    }
+
+    const ModalContents = Modals[state.modal.id]()
+    return (
+      <MuiThemeProvider muiTheme={lightMuiTheme}>
+        <div key='modal' className='modal'>
+          <div key='modal-background' className='modal-background' />
+          <div key='modal-content' className='modal-content'>
+            <ModalContents state={state} />
+          </div>
+        </div>
+      </MuiThemeProvider>
+    )
+  }
+
+  getView () {
+    const state = this.props.state
+    const View = Views[state.location.url()]()
+    return (<View state={state} />)
+  }
+}
+
+module.exports = App

src/renderer/pages/create-torrent-page.js

@@ -0,0 +1,216 @@
+const createTorrent = require('create-torrent')
+const path = require('path')
+const prettyBytes = require('prettier-bytes')
+const React = require('react')
+
+const {dispatch, dispatcher} = require('../lib/dispatcher')
+
+const FlatButton = require('material-ui/FlatButton').default
+const RaisedButton = require('material-ui/RaisedButton').default
+const TextField = require('material-ui/TextField').default
+const Checkbox = require('material-ui/Checkbox').default
+
+const CreateTorrentErrorPage = require('../components/create-torrent-error-page')
+const Heading = require('../components/heading')
+const ShowMore = require('../components/show-more')
+
+// Shows a basic UI to create a torrent, from an already-selected file or folder.
+// Includes a "Show Advanced..." button and more advanced UI.
+class CreateTorrentPage extends React.Component {
+  constructor (props) {
+    super(props)
+
+    const state = this.props.state
+    const info = state.location.current()
+
+    // First, extract the base folder that the files are all in
+    let pathPrefix = info.folderPath
+    if (!pathPrefix) {
+      pathPrefix = info.files.map((x) => x.path).reduce(findCommonPrefix)
+      if (!pathPrefix.endsWith('/') && !pathPrefix.endsWith('\\')) {
+        pathPrefix = path.dirname(pathPrefix)
+      }
+    }
+
+    // Then, exclude .DS_Store and other dotfiles
+    const files = info.files
+      .filter((f) => !containsDots(f.path, pathPrefix))
+      .map((f) => ({name: f.name, path: f.path, size: f.size}))
+    if (files.length === 0) return (<CreateTorrentErrorPage state={state} />)
+
+    // Then, use the name of the base folder (or sole file, for a single file torrent)
+    // as the default name. Show all files relative to the base folder.
+    let defaultName, basePath
+    if (files.length === 1) {
+      // Single file torrent: /a/b/foo.jpg -> torrent name 'foo.jpg', path '/a/b'
+      defaultName = files[0].name
+      basePath = pathPrefix
+    } else {
+      // Multi file torrent: /a/b/{foo, bar}.jpg -> torrent name 'b', path '/a'
+      defaultName = path.basename(pathPrefix)
+      basePath = path.dirname(pathPrefix)
+    }
+
+    // Default trackers
+    const trackers = createTorrent.announceList.join('\n')
+
+    this.state = {
+      comment: '',
+      isPrivate: false,
+      pathPrefix,
+      basePath,
+      defaultName,
+      files,
+      trackers
+    }
+
+    // Create React event handlers only once
+    this.setIsPrivate = (_, isPrivate) => this.setState({isPrivate})
+    this.setComment = (_, comment) => this.setState({comment})
+    this.setTrackers = (_, trackers) => this.setState({trackers})
+    this.handleSubmit = handleSubmit.bind(this)
+  }
+
+  render () {
+    const files = this.state.files
+
+    // Sanity check: show the number of files and total size
+    const numFiles = files.length
+    const totalBytes = files
+      .map((f) => f.size)
+      .reduce((a, b) => a + b, 0)
+    const torrentInfo = `${numFiles} files, ${prettyBytes(totalBytes)}`
+
+    return (
+      <div className='create-torrent'>
+        <Heading level={1}>Create torrent {this.state.defaultName}</Heading>
+        <div className='torrent-info'>{torrentInfo}</div>
+        <div className='torrent-attribute'>
+          <label>Path:</label>
+          <div>{this.state.pathPrefix}</div>
+        </div>
+        <ShowMore
+          style={{
+            marginBottom: 10
+          }}
+          hideLabel='Hide advanced settings...'
+          showLabel='Show advanced settings...'>
+          {this.renderAdvanced()}
+        </ShowMore>
+        <div className='float-right'>
+          <FlatButton
+            className='control cancel'
+            label='Cancel'
+            style={{
+              marginRight: 10
+            }}
+            onClick={dispatcher('cancel')} />
+          <RaisedButton
+            className='control create-torrent-button'
+            label='Create Torrent'
+            primary
+            onClick={this.handleSubmit} />
+        </div>
+      </div>
+    )
+  }
+
+  // Renders everything after clicking Show Advanced...:
+  // * Is Private? (private torrents, not announced to DHT)
+  // * Announce list (trackers)
+  // * Comment
+  renderAdvanced () {
+    // Create file list
+    const maxFileElems = 100
+    const files = this.state.files
+    const fileElems = files.slice(0, maxFileElems).map((file, i) => {
+      const relativePath = path.relative(this.state.pathPrefix, file.path)
+      return (<div key={i}>{relativePath}</div>)
+    })
+    if (files.length > maxFileElems) {
+      fileElems.push(<div key='more'>+ {files.length - maxFileElems} more</div>)
+    }
+
+    // Align the text fields
+    const textFieldStyle = { width: '' }
+    const textareaStyle = { margin: 0 }
+
+    return (
+      <div key='advanced' className='create-torrent-advanced'>
+        <div key='private' className='torrent-attribute'>
+          <label>Private:</label>
+          <Checkbox
+            className='torrent-is-private control'
+            style={{display: ''}}
+            checked={this.state.isPrivate}
+            onCheck={this.setIsPrivate} />
+        </div>
+        <div key='trackers' className='torrent-attribute'>
+          <label>Trackers:</label>
+          <TextField
+            className='torrent-trackers control'
+            style={textFieldStyle}
+            textareaStyle={textareaStyle}
+            multiLine
+            rows={2}
+            rowsMax={10}
+            value={this.state.trackers}
+            onChange={this.setTrackers} />
+        </div>
+        <div key='comment' className='torrent-attribute'>
+          <label>Comment:</label>
+          <TextField
+            className='torrent-comment control'
+            style={textFieldStyle}
+            textareaStyle={textareaStyle}
+            hintText='Optionally describe your torrent...'
+            multiLine
+            rows={2}
+            rowsMax={10}
+            value={this.state.comment}
+            onChange={this.setComment} />
+        </div>
+        <div key='files' className='torrent-attribute'>
+          <label>Files:</label>
+          <div>{fileElems}</div>
+        </div>
+      </div>
+    )
+  }
+}
+
+function handleSubmit () {
+  const announceList = this.state.trackers
+    .split('\n')
+    .map((s) => s.trim())
+    .filter((s) => s !== '')
+  const options = {
+    // We can't let the user choose their own name if we want WebTorrent
+    // to use the files in place rather than creating a new folder.
+    name: this.state.defaultName,
+    path: this.state.basePath,
+    files: this.state.files,
+    announce: announceList,
+    private: this.state.isPrivate,
+    comment: this.state.comment.trim()
+  }
+  dispatch('createTorrent', options)
+}
+
+// Finds the longest common prefix
+function findCommonPrefix (a, b) {
+  let i
+  for (i = 0; i < a.length && i < b.length; i++) {
+    if (a.charCodeAt(i) !== b.charCodeAt(i)) break
+  }
+  if (i === a.length) return a
+  if (i === b.length) return b
+  return a.substring(0, i)
+}
+
+function containsDots (path, pathPrefix) {
+  const suffix = path.substring(pathPrefix.length).replace(/\\/g, '/')
+  return ('/' + suffix).includes('/.')
+}
+
+module.exports = CreateTorrentPage

src/renderer/pages/player-page.js

@@ -2,19 +2,20 @@ const React = require('react')
 const Bitfield = require('bitfield')
 const prettyBytes = require('prettier-bytes')
 const zeroFill = require('zero-fill')
-const path = require('path')
 
 const TorrentSummary = require('../lib/torrent-summary')
+const Playlist = require('../lib/playlist')
 const {dispatch, dispatcher} = require('../lib/dispatcher')
+const config = require('../../config')
 
 // Shows a streaming video player. Standard features + Chromecast + Airplay
 module.exports = class Player extends React.Component {
   render () {
     // Show the video as large as will fit in the window, play immediately
     // If the video is on Chromecast or Airplay, show a title screen instead
-    var state = this.props.state
-    var showVideo = state.playing.location === 'local'
-    var showControls = state.playing.location !== 'external'
+    const state = this.props.state
+    const showVideo = state.playing.location === 'local'
+    const showControls = state.playing.location !== 'external'
     return (
       <div
         className='player'
@@ -25,6 +26,15 @@ module.exports = class Player extends React.Component {
       </div>
     )
   }
+
+  onComponentWillUnmount () {
+    // Unload the media element so that Chromium stops trying to fetch data
+    const tag = document.querySelector('audio,video')
+    if (!tag) return
+    tag.pause()
+    tag.src = ''
+    tag.load()
+  }
 }
 
 // Handles volume change by wheel
@@ -38,7 +48,7 @@ function renderMedia (state) {
   // Unfortunately, play/pause can't be done just by modifying HTML.
   // Instead, grab the DOM node and play/pause it if necessary
   // Get the <video> or <audio> tag
-  var mediaElement = document.querySelector(state.playing.type)
+  const mediaElement = document.querySelector(state.playing.type)
   if (mediaElement !== null) {
     if (state.playing.isPaused && !mediaElement.paused) {
       mediaElement.pause()
@@ -66,20 +76,20 @@ function renderMedia (state) {
     }
 
     // Switch to the newly added subtitle track, if available
-    var tracks = mediaElement.textTracks || []
-    for (var j = 0; j < tracks.length; j++) {
-      var isSelectedTrack = j === state.playing.subtitles.selectedIndex
+    const tracks = mediaElement.textTracks || []
+    for (let j = 0; j < tracks.length; j++) {
+      const isSelectedTrack = j === state.playing.subtitles.selectedIndex
       tracks[j].mode = isSelectedTrack ? 'showing' : 'hidden'
     }
 
     // Save video position
-    var file = state.getPlayingFileSummary()
+    const file = state.getPlayingFileSummary()
     file.currentTime = state.playing.currentTime = mediaElement.currentTime
     file.duration = state.playing.duration = mediaElement.duration
 
     // Save selected subtitle
     if (state.playing.subtitles.selectedIndex !== -1) {
-      var index = state.playing.subtitles.selectedIndex
+      const index = state.playing.subtitles.selectedIndex
       file.selectedSubtitle = state.playing.subtitles.tracks[index].filePath
     } else if (file.selectedSubtitle != null) {
       delete file.selectedSubtitle
@@ -89,11 +99,11 @@ function renderMedia (state) {
   }
 
   // Add subtitles to the <video> tag
-  var trackTags = []
+  const trackTags = []
   if (state.playing.subtitles.selectedIndex >= 0) {
-    for (var i = 0; i < state.playing.subtitles.tracks.length; i++) {
-      var track = state.playing.subtitles.tracks[i]
-      var isSelected = state.playing.subtitles.selectedIndex === i
+    for (let i = 0; i < state.playing.subtitles.tracks.length; i++) {
+      const track = state.playing.subtitles.tracks[i]
+      const isSelected = state.playing.subtitles.selectedIndex === i
       trackTags.push(
         <track
           key={i}
@@ -106,10 +116,10 @@ function renderMedia (state) {
   }
 
   // Create the <audio> or <video> tag
-  var MediaTagName = state.playing.type
-  var mediaTag = (
+  const MediaTagName = state.playing.type
+  const mediaTag = (
     <MediaTagName
-      src={state.server.localURL}
+      src={Playlist.getCurrentLocalURL(state)}
       onDoubleClick={dispatcher('toggleFullScreen')}
       onLoadedMetadata={onLoadedMetadata}
       onEnded={onEnded}
@@ -136,21 +146,25 @@ function renderMedia (state) {
   // As soon as we know the video dimensions, resize the window
   function onLoadedMetadata (e) {
     if (state.playing.type !== 'video') return
-    var video = e.target
-    var dimensions = {
+    const video = e.target
+    const dimensions = {
       width: video.videoWidth,
       height: video.videoHeight
     }
     dispatch('setDimensions', dimensions)
   }
 
-  // When the video completes, pause the video instead of looping
   function onEnded (e) {
-    state.playing.isPaused = true
+    if (Playlist.hasNext(state)) {
+      dispatch('nextTrack')
+    } else {
+      // When the last video completes, pause the video instead of looping
+      state.playing.isPaused = true
+    }
   }
 
   function onCanPlay (e) {
-    var elem = e.target
+    const elem = e.target
     if (state.playing.type === 'video' &&
       elem.webkitVideoDecodedByteCount === 0) {
       dispatch('mediaError', 'Video codec unsupported')
@@ -164,15 +178,15 @@ function renderMedia (state) {
 }
 
 function renderOverlay (state) {
-  var elems = []
-  var audioMetadataElem = renderAudioMetadata(state)
-  var spinnerElem = renderLoadingSpinner(state)
+  const elems = []
+  const audioMetadataElem = renderAudioMetadata(state)
+  const spinnerElem = renderLoadingSpinner(state)
   if (audioMetadataElem) elems.push(audioMetadataElem)
   if (spinnerElem) elems.push(spinnerElem)
 
   // Video fills the window, centered with black bars if necessary
   // Audio gets a static poster image and a summary of the file metadata.
-  var style
+  let style
   if (state.playing.type === 'audio') {
     style = { backgroundImage: cssBackgroundImagePoster(state) }
   } else if (elems.length !== 0) {
@@ -190,27 +204,27 @@ function renderOverlay (state) {
 }
 
 function renderAudioMetadata (state) {
-  var fileSummary = state.getPlayingFileSummary()
+  const fileSummary = state.getPlayingFileSummary()
   if (!fileSummary.audioInfo) return
-  var info = fileSummary.audioInfo
+  const info = fileSummary.audioInfo
 
   // Get audio track info
-  var title = info.title
+  let title = info.title
   if (!title) {
     title = fileSummary.name
   }
-  var artist = info.artist && info.artist[0]
-  var album = info.album
+  let artist = info.artist && info.artist[0]
+  let album = info.album
   if (album && info.year && !album.includes(info.year)) {
     album += ' (' + info.year + ')'
   }
-  var track
+  let track
   if (info.track && info.track.no && info.track.of) {
     track = info.track.no + ' of ' + info.track.of
   }
 
   // Show a small info box in the middle of the screen with title/album/etc
-  var elems = []
+  const elems = []
   if (artist) {
     elems.push((
       <div key='artist' className='audio-artist'>
@@ -234,7 +248,7 @@ function renderAudioMetadata (state) {
   }
 
   // Align the title with the other info, if available. Otherwise, center title
-  var emptyLabel = (<label />)
+  const emptyLabel = (<label />)
   elems.unshift((
     <div key='title' className='audio-title'>
       {elems.length ? emptyLabel : undefined}{title}
@@ -246,14 +260,14 @@ function renderAudioMetadata (state) {
 
 function renderLoadingSpinner (state) {
   if (state.playing.isPaused) return
-  var isProbablyStalled = state.playing.isStalled ||
+  const isProbablyStalled = state.playing.isStalled ||
     (new Date().getTime() - state.playing.lastTimeUpdate > 2000)
   if (!isProbablyStalled) return
 
-  var prog = state.getPlayingTorrentSummary().progress || {}
-  var fileProgress = 0
+  const prog = state.getPlayingTorrentSummary().progress || {}
+  let fileProgress = 0
   if (prog.files) {
-    var file = prog.files[state.playing.fileIndex]
+    const file = prog.files[state.playing.fileIndex]
     fileProgress = Math.floor(100 * file.numPiecesPresent / file.numPieces)
   }
 
@@ -261,16 +275,16 @@ function renderLoadingSpinner (state) {
     <div key='loading' className='media-stalled'>
       <div key='loading-spinner' className='loading-spinner'>&nbsp;</div>
       <div key='loading-progress' className='loading-status ellipsis'>
-        <span className='progress'>{fileProgress}%</span> downloaded,
-        <span>↓ {prettyBytes(prog.downloadSpeed || 0)}/s</span>
-        <span>↑ {prettyBytes(prog.uploadSpeed || 0)}/s</span>
+        <span className='progress'>{fileProgress}%</span> downloaded
+        <span> ↓ {prettyBytes(prog.downloadSpeed || 0)}/s</span>
+        <span> ↑ {prettyBytes(prog.uploadSpeed || 0)}/s</span>
       </div>
     </div>
   )
 }
 
 function renderCastScreen (state) {
-  var castIcon, castType, isCast
+  let castIcon, castType, isCast
   if (state.playing.location.startsWith('chromecast')) {
     castIcon = 'cast_connected'
     castType = 'Chromecast'
@@ -284,11 +298,8 @@ function renderCastScreen (state) {
     castType = 'DLNA'
     isCast = true
   } else if (state.playing.location === 'external') {
-    // TODO: get the player name in a more reliable way
-    var playerPath = state.saved.prefs.externalPlayerPath
-    var playerName = playerPath ? path.basename(playerPath).split('.')[0] : 'VLC'
     castIcon = 'tv'
-    castType = playerName
+    castType = state.getExternalPlayerName()
     isCast = false
   } else if (state.playing.location === 'error') {
     castIcon = 'error_outline'
@@ -296,15 +307,15 @@ function renderCastScreen (state) {
     isCast = false
   }
 
-  var isStarting = state.playing.location.endsWith('-pending')
-  var castName = state.playing.castName
-  var castStatus
+  const isStarting = state.playing.location.endsWith('-pending')
+  const castName = state.playing.castName
+  let castStatus
   if (isCast && isStarting) castStatus = 'Connecting to ' + castName + '...'
   else if (isCast && !isStarting) castStatus = 'Connected to ' + castName
   else castStatus = ''
 
   // Show a nice title image, if possible
-  var style = {
+  const style = {
     backgroundImage: cssBackgroundImagePoster(state)
   }
 
@@ -322,12 +333,12 @@ function renderCastScreen (state) {
 function renderCastOptions (state) {
   if (!state.devices.castMenu) return
 
-  var {location, devices} = state.devices.castMenu
-  var player = state.devices[location]
+  const {location, devices} = state.devices.castMenu
+  const player = state.devices[location]
 
-  var items = devices.map(function (device, ix) {
-    var isSelected = player.device === device
-    var name = device.name
+  const items = devices.map(function (device, ix) {
+    const isSelected = player.device === device
+    const name = device.name
     return (
       <li key={ix} onClick={dispatcher('selectCastDevice', ix)}>
         <i className='icon'>{isSelected ? 'radio_button_checked' : 'radio_button_unchecked'}</i>
@@ -344,11 +355,11 @@ function renderCastOptions (state) {
 }
 
 function renderSubtitleOptions (state) {
-  var subtitles = state.playing.subtitles
+  const subtitles = state.playing.subtitles
   if (!subtitles.tracks.length || !subtitles.showMenu) return
 
-  var items = subtitles.tracks.map(function (track, ix) {
-    var isSelected = state.playing.subtitles.selectedIndex === ix
+  const items = subtitles.tracks.map(function (track, ix) {
+    const isSelected = state.playing.subtitles.selectedIndex === ix
     return (
       <li key={ix} onClick={dispatcher('selectSubtitle', ix)}>
         <i className='icon'>{'radio_button_' + (isSelected ? 'checked' : 'unchecked')}</i>
@@ -357,8 +368,8 @@ function renderSubtitleOptions (state) {
     )
   })
 
-  var noneSelected = state.playing.subtitles.selectedIndex === -1
-  var noneClass = 'radio_button_' + (noneSelected ? 'checked' : 'unchecked')
+  const noneSelected = state.playing.subtitles.selectedIndex === -1
+  const noneClass = 'radio_button_' + (noneSelected ? 'checked' : 'unchecked')
   return (
     <ul key='subtitle-options' className='options-list'>
       {items}
@@ -371,32 +382,39 @@ function renderSubtitleOptions (state) {
 }
 
 function renderPlayerControls (state) {
-  var positionPercent = 100 * state.playing.currentTime / state.playing.duration
-  var playbackCursorStyle = { left: 'calc(' + positionPercent + '% - 3px)' }
-  var captionsClass = state.playing.subtitles.tracks.length === 0
+  const positionPercent = 100 * state.playing.currentTime / state.playing.duration
+  const playbackCursorStyle = { left: 'calc(' + positionPercent + '% - 3px)' }
+  const captionsClass = state.playing.subtitles.tracks.length === 0
     ? 'disabled'
     : state.playing.subtitles.selectedIndex >= 0
       ? 'active'
       : ''
+  const prevClass = Playlist.hasPrevious(state) ? '' : 'disabled'
+  const nextClass = Playlist.hasNext(state) ? '' : 'disabled'
 
-  var elements = [
+  const elements = [
     <div key='playback-bar' className='playback-bar'>
       {renderLoadingBar(state)}
       <div
         key='cursor'
         className='playback-cursor'
-        style={playbackCursorStyle}
-      />
+        style={playbackCursorStyle} />
       <div
         key='scrub-bar'
         className='scrub-bar'
         draggable='true'
         onDragStart={handleDragStart}
         onClick={handleScrub}
-        onDrag={handleScrub}
-      />
+        onDrag={handleScrub} />
     </div>,
 
+    <i
+      key='skip-previous'
+      className={'icon skip-previous float-left ' + prevClass}
+      onClick={dispatcher('previousTrack')}>
+      skip_previous
+    </i>,
+
     <i
       key='play'
       className='icon play-pause float-left'
@@ -404,6 +422,13 @@ function renderPlayerControls (state) {
       {state.playing.isPaused ? 'play_arrow' : 'pause'}
     </i>,
 
+    <i
+      key='skip-next'
+      className={'icon skip-next float-left ' + nextClass}
+      onClick={dispatcher('nextTrack')}>
+      skip_next
+    </i>,
+
     <i
       key='fullscreen'
       className='icon fullscreen float-right'
@@ -413,7 +438,7 @@ function renderPlayerControls (state) {
   ]
 
   if (state.playing.type === 'video') {
-    // show closed captions icon
+    // Show closed captions icon
     elements.push((
       <i
         key='subtitles'
@@ -425,24 +450,24 @@ function renderPlayerControls (state) {
   }
 
   // If we've detected a Chromecast or AppleTV, the user can play video there
-  var castTypes = ['chromecast', 'airplay', 'dlna']
-  var isCastingAnywhere = castTypes.some(
+  const castTypes = ['chromecast', 'airplay', 'dlna']
+  const isCastingAnywhere = castTypes.some(
     (castType) => state.playing.location.startsWith(castType))
 
   // Add the cast buttons. Icons for each cast type, connected/disconnected:
-  var buttonIcons = {
+  const buttonIcons = {
     'chromecast': {true: 'cast_connected', false: 'cast'},
     'airplay': {true: 'airplay', false: 'airplay'},
     'dlna': {true: 'tv', false: 'tv'}
   }
   castTypes.forEach(function (castType) {
     // Do we show this button (eg. the Chromecast button) at all?
-    var isCasting = state.playing.location.startsWith(castType)
-    var player = state.devices[castType]
+    const isCasting = state.playing.location.startsWith(castType)
+    const player = state.devices[castType]
     if ((!player || player.getDevices().length === 0) && !isCasting) return
 
     // Show the button. Three options for eg the Chromecast button:
-    var buttonClass, buttonHandler
+    let buttonClass, buttonHandler
     if (isCasting) {
       // Option 1: we are currently connected to Chromecast. Button stops the cast.
       buttonClass = 'active'
@@ -456,7 +481,7 @@ function renderPlayerControls (state) {
       buttonClass = ''
       buttonHandler = dispatcher('toggleCastMenu', castType)
     }
-    var buttonIcon = buttonIcons[castType][isCasting]
+    const buttonIcon = buttonIcons[castType][isCasting]
 
     elements.push((
       <i
@@ -469,20 +494,18 @@ function renderPlayerControls (state) {
   })
 
   // Render volume slider
-  var volume = state.playing.volume
-  var volumeIcon = 'volume_' + (
+  const volume = state.playing.volume
+  const volumeIcon = 'volume_' + (
     volume === 0 ? 'off'
     : volume < 0.3 ? 'mute'
     : volume < 0.6 ? 'down'
     : 'up')
-  var volumeStyle = {
+  const volumeStyle = {
     background: '-webkit-gradient(linear, left top, right top, ' +
       'color-stop(' + (volume * 100) + '%, #eee), ' +
       'color-stop(' + (volume * 100) + '%, #727272))'
   }
 
-  // TODO: dcposch change the range input to use value / onChanged instead of
-  // "readonly" / onMouse[Down,Move,Up]
   elements.push((
     <div key='volume' className='volume float-left'>
       <i
@@ -495,21 +518,20 @@ function renderPlayerControls (state) {
         type='range' min='0' max='1' step='0.05'
         value={volume}
         onChange={handleVolumeScrub}
-        style={volumeStyle}
-      />
+        style={volumeStyle} />
     </div>
   ))
 
   // Show video playback progress
-  var currentTimeStr = formatTime(state.playing.currentTime)
-  var durationStr = formatTime(state.playing.duration)
+  const currentTimeStr = formatTime(state.playing.currentTime)
+  const durationStr = formatTime(state.playing.duration)
   elements.push((
     <span key='time' className='time float-left'>
       {currentTimeStr} / {durationStr}
     </span>
   ))
 
-  // render playback rate
+  // Render playback rate
   if (state.playing.playbackRate !== 1) {
     elements.push((
       <span key='rate' className='rate float-left'>
@@ -519,7 +541,9 @@ function renderPlayerControls (state) {
   }
 
   return (
-    <div key='controls' className='controls'>
+    <div key='controls' className='controls'
+      onMouseEnter={dispatcher('mediaControlsMouseEnter')}
+      onMouseLeave={dispatcher('mediaControlsMouseLeave')}>
       {elements}
       {renderCastOptions(state)}
       {renderSubtitleOptions(state)}
@@ -529,7 +553,7 @@ function renderPlayerControls (state) {
   function handleDragStart (e) {
     // Prevent the cursor from changing, eg to a green + icon on Mac
     if (e.dataTransfer) {
-      var dt = e.dataTransfer
+      const dt = e.dataTransfer
       dt.effectAllowed = 'none'
     }
   }
@@ -538,9 +562,9 @@ function renderPlayerControls (state) {
   function handleScrub (e) {
     if (!e.clientX) return
     dispatch('mediaMouseMoved')
-    var windowWidth = document.querySelector('body').clientWidth
-    var fraction = e.clientX / windowWidth
-    var position = fraction * state.playing.duration /* seconds */
+    const windowWidth = document.querySelector('body').clientWidth
+    const fraction = e.clientX / windowWidth
+    const position = fraction * state.playing.duration /* seconds */
     dispatch('skipTo', position)
   }
 
@@ -571,18 +595,23 @@ function renderPlayerControls (state) {
 // Renders the loading bar. Shows which parts of the torrent are loaded, which
 // can be 'spongey' / non-contiguous
 function renderLoadingBar (state) {
-  var torrentSummary = state.getPlayingTorrentSummary()
+  if (config.IS_TEST) return // Don't integration test the loading bar. Screenshots won't match.
+
+  const torrentSummary = state.getPlayingTorrentSummary()
   if (!torrentSummary.progress) {
-    return []
+    return null
   }
 
   // Find all contiguous parts of the torrent which are loaded
-  var prog = torrentSummary.progress
-  var fileProg = prog.files[state.playing.fileIndex]
-  var parts = []
-  var lastPiecePresent = false
-  for (var i = fileProg.startPiece; i <= fileProg.endPiece; i++) {
-    var partPresent = Bitfield.prototype.get.call(prog.bitfield, i)
+  const prog = torrentSummary.progress
+  const fileProg = prog.files[state.playing.fileIndex]
+
+  if (!fileProg) return null
+
+  const parts = []
+  let lastPiecePresent = false
+  for (let i = fileProg.startPiece; i <= fileProg.endPiece; i++) {
+    const partPresent = Bitfield.prototype.get.call(prog.bitfield, i)
     if (partPresent && !lastPiecePresent) {
       parts.push({start: i - fileProg.startPiece, count: 1})
     } else if (partPresent) {
@@ -592,21 +621,22 @@ function renderLoadingBar (state) {
   }
 
   // Output some bars to show which parts of the file are loaded
-  var loadingBarElems = parts.map(function (part, i) {
-    var style = {
+  const loadingBarElems = parts.map(function (part, i) {
+    const style = {
       left: (100 * part.start / fileProg.numPieces) + '%',
       width: (100 * part.count / fileProg.numPieces) + '%'
     }
 
     return (<div key={i} className='loading-bar-part' style={style} />)
   })
+
   return (<div key='loading-bar' className='loading-bar'>{loadingBarElems}</div>)
 }
 
 // Returns the CSS background-image string for a poster image + dark vignette
 function cssBackgroundImagePoster (state) {
-  var torrentSummary = state.getPlayingTorrentSummary()
-  var posterPath = TorrentSummary.getPosterPath(torrentSummary)
+  const torrentSummary = state.getPlayingTorrentSummary()
+  const posterPath = TorrentSummary.getPosterPath(torrentSummary)
   if (!posterPath) return ''
   return cssBackgroundImageDarkGradient() + `, url('${posterPath}')`
 }
@@ -621,12 +651,12 @@ function formatTime (time) {
     return '0:00'
   }
 
-  var hours = Math.floor(time / 3600)
-  var minutes = Math.floor(time % 3600 / 60)
+  let hours = Math.floor(time / 3600)
+  let minutes = Math.floor(time % 3600 / 60)
   if (hours > 0) {
     minutes = zeroFill(2, minutes)
   }
-  var seconds = zeroFill(2, Math.floor(time % 60))
+  let seconds = zeroFill(2, Math.floor(time % 60))
 
   return (hours > 0 ? hours + ':' : '') + minutes + ':' + seconds
 }

src/renderer/pages/preferences-page.js

@@ -1,13 +1,14 @@
-const colors = require('material-ui/styles/colors')
 const path = require('path')
 const React = require('react')
 
+const colors = require('material-ui/styles/colors')
 const Checkbox = require('material-ui/Checkbox').default
-const Heading = require('../components/Heading')
-const PathSelector = require('../components/PathSelector')
 const RaisedButton = require('material-ui/RaisedButton').default
+const Heading = require('../components/heading')
+const PathSelector = require('../components/path-selector')
 
 const {dispatch} = require('../lib/dispatcher')
+const config = require('../../config')
 
 class PreferencesPage extends React.Component {
   constructor (props) {
@@ -21,6 +22,9 @@ class PreferencesPage extends React.Component {
 
     this.handleExternalPlayerPathChange =
       this.handleExternalPlayerPathChange.bind(this)
+
+    this.handleStartupChange =
+      this.handleStartupChange.bind(this)
   }
 
   downloadPathSelector () {
@@ -33,8 +37,7 @@ class PreferencesPage extends React.Component {
           }}
           onChange={this.handleDownloadPathChange}
           title='Download location'
-          value={this.props.state.unsaved.prefs.downloadPath}
-        />
+          value={this.props.state.unsaved.prefs.downloadPath} />
       </Preference>
     )
   }
@@ -50,8 +53,7 @@ class PreferencesPage extends React.Component {
           className='control'
           checked={!this.props.state.unsaved.prefs.openExternalPlayer}
           label={'Play torrent media files using WebTorrent'}
-          onCheck={this.handleOpenExternalPlayerChange}
-        />
+          onCheck={this.handleOpenExternalPlayerChange} />
       </Preference>
     )
   }
@@ -67,7 +69,7 @@ class PreferencesPage extends React.Component {
           className='control'
           checked={this.props.state.unsaved.prefs.highestPlaybackPriority}
           label={'Highest Playback Priority'}
-          onCheck={this.handleHighestPlaybackPriorityChange}
+          onCheck={this.handleHighestPlaybackPriorityChange} 
         />
         <p>Pauses all active torrents to allow playback to use all of the available bandwidth.</p>
       </Preference>
@@ -79,14 +81,12 @@ class PreferencesPage extends React.Component {
   }
 
   externalPlayerPathSelector () {
-    const playerName = path.basename(
-      this.props.state.unsaved.prefs.externalPlayerPath || 'VLC'
-    )
+    const playerPath = this.props.state.unsaved.prefs.externalPlayerPath
+    const playerName = this.props.state.getExternalPlayerName()
 
     const description = this.props.state.unsaved.prefs.openExternalPlayer
       ? `Torrent media files will always play in ${playerName}.`
-      : `Torrent media files will play in ${playerName} if WebTorrent cannot ` +
-        'play them.'
+      : `Torrent media files will play in ${playerName} if WebTorrent cannot play them.`
 
     return (
       <Preference>
@@ -99,48 +99,70 @@ class PreferencesPage extends React.Component {
           displayValue={playerName}
           onChange={this.handleExternalPlayerPathChange}
           title='External player'
-          value={this.props.state.unsaved.prefs.externalPlayerPath}
-        />
+          value={playerPath ? path.dirname(playerPath) : null} />
       </Preference>
     )
   }
 
   handleExternalPlayerPathChange (filePath) {
-    if (path.extname(filePath) === '.app') {
-      // Mac: Use executable in packaged .app bundle
-      filePath += '/Contents/MacOS/' + path.basename(filePath, '.app')
-    }
     dispatch('updatePreferences', 'externalPlayerPath', filePath)
   }
 
   setDefaultAppButton () {
+    const isFileHandler = this.props.state.unsaved.prefs.isFileHandler
+    if (isFileHandler) {
+      return (
+        <Preference>
+          <p>WebTorrent is your default torrent app. Hooray!</p>
+        </Preference>
+      )
+    }
     return (
       <Preference>
         <p>WebTorrent is not currently the default torrent app.</p>
         <RaisedButton
           className='control'
           onClick={this.handleSetDefaultApp}
-          label='Make WebTorrent the default'
-        />
+          label='Make WebTorrent the default' />
       </Preference>
     )
   }
 
+  handleStartupChange (e, isChecked) {
+    dispatch('updatePreferences', 'startup', isChecked)
+  }
+
+  setStartupSection () {
+    if (config.IS_PORTABLE) {
+      return
+    }
+
+    return (
+      <PreferencesSection title='Startup'>
+        <Preference>
+          <Checkbox
+            className='control'
+            checked={this.props.state.unsaved.prefs.startup}
+            label={'Open WebTorrent on startup.'}
+            onCheck={this.handleStartupChange}
+          />
+        </Preference>
+      </PreferencesSection>
+    )
+  }
+
   handleSetDefaultApp () {
-    window.alert('TODO')
-    // var isFileHandler = state.unsaved.prefs.isFileHandler
-    // dispatch('updatePreferences', 'isFileHandler', !isFileHandler)
+    dispatch('updatePreferences', 'isFileHandler', true)
   }
 
   render () {
+    const style = {
+      color: colors.grey400,
+      marginLeft: 25,
+      marginRight: 25
+    }
     return (
-      <div
-        style={{
-          color: colors.grey400,
-          marginLeft: 25,
-          marginRight: 25
-        }}
-      >
+      <div style={style}>
         <PreferencesSection title='Downloads'>
           {this.downloadPathSelector()}
         </PreferencesSection>
@@ -152,6 +174,7 @@ class PreferencesPage extends React.Component {
         <PreferencesSection title='Default torrent app'>
           {this.setDefaultAppButton()}
         </PreferencesSection>
+        {this.setStartupSection()}
       </div>
     )
   }
@@ -165,13 +188,12 @@ class PreferencesSection extends React.Component {
   }
 
   render () {
+    const style = {
+      marginBottom: 25,
+      marginTop: 25
+    }
     return (
-      <div
-        style={{
-          marginBottom: 25,
-          marginTop: 25
-        }}
-      >
+      <div style={style}>
         <Heading level={2}>{this.props.title}</Heading>
         {this.props.children}
       </div>
@@ -181,15 +203,8 @@ class PreferencesSection extends React.Component {
 
 class Preference extends React.Component {
   render () {
-    return (
-      <div
-        style={{
-          marginBottom: 10
-        }}
-      >
-        {this.props.children}
-      </div>
-    )
+    const style = { marginBottom: 10 }
+    return (<div style={style}>{this.props.children}</div>)
   }
 }
 

src/renderer/pages/torrent-list-page.js

@@ -1,15 +1,18 @@
 const React = require('react')
 const prettyBytes = require('prettier-bytes')
 
+const Checkbox = require('material-ui/Checkbox').default
+const LinearProgress = require('material-ui/LinearProgress').default
+
 const TorrentSummary = require('../lib/torrent-summary')
 const TorrentPlayer = require('../lib/torrent-player')
 const {dispatcher} = require('../lib/dispatcher')
 
 module.exports = class TorrentList extends React.Component {
   render () {
-    var state = this.props.state
+    const state = this.props.state
 
-    var contents = []
+    const contents = []
     if (state.downloadPathStatus === 'missing') {
       contents.push(
         <div key='torrent-missing-path'>
@@ -21,7 +24,7 @@ module.exports = class TorrentList extends React.Component {
         </div>
       )
     }
-    var torrentElems = state.saved.torrents.map(
+    const torrentElems = state.saved.torrents.map(
       (torrentSummary) => this.renderTorrent(torrentSummary)
     )
     contents.push(...torrentElems)
@@ -39,30 +42,27 @@ module.exports = class TorrentList extends React.Component {
   }
 
   renderTorrent (torrentSummary) {
-    var state = this.props.state
-    var infoHash = torrentSummary.infoHash
-    var isSelected = infoHash && state.selectedInfoHash === infoHash
+    const state = this.props.state
+    const infoHash = torrentSummary.infoHash
+    const isSelected = infoHash && state.selectedInfoHash === infoHash
 
     // Background image: show some nice visuals, like a frame from the movie, if possible
-    var style = {}
+    const style = {}
     if (torrentSummary.posterFileName) {
-      var gradient = isSelected
-        ? 'linear-gradient(to bottom, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.4) 100%)'
-        : 'linear-gradient(to bottom, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0) 100%)'
-      var posterPath = TorrentSummary.getPosterPath(torrentSummary)
-      style.backgroundImage = gradient + `, url('${posterPath}')`
+      const gradient = 'linear-gradient(to bottom, rgba(0, 0, 0, 0.4) 0%, rgba(0, 0, 0, 0.4) 100%)'
+      const posterPath = TorrentSummary.getPosterPath(torrentSummary)
+      style.backgroundImage = `${gradient}, url('${posterPath}')`
     }
 
     // Foreground: name of the torrent, basic info like size, play button,
     // cast buttons if available, and delete
-    var classes = ['torrent']
-    //  playStatus turns the play button into a loading spinner or error icon
-    if (torrentSummary.playStatus) classes.push(torrentSummary.playStatus)
+    const classes = ['torrent']
     if (isSelected) classes.push('selected')
     if (!infoHash) classes.push('disabled')
     if (!torrentSummary.torrentKey) throw new Error('Missing torrentKey')
     return (
       <div
+        id={torrentSummary.testID && ('torrent-' + torrentSummary.testID)}
         key={torrentSummary.torrentKey}
         style={style}
         className={classes.join(' ')}
@@ -71,48 +71,96 @@ module.exports = class TorrentList extends React.Component {
         {this.renderTorrentMetadata(torrentSummary)}
         {infoHash ? this.renderTorrentButtons(torrentSummary) : null}
         {isSelected ? this.renderTorrentDetails(torrentSummary) : null}
+        <hr />
       </div>
     )
   }
 
   // Show name, download status, % complete
   renderTorrentMetadata (torrentSummary) {
-    var name = torrentSummary.name || 'Loading torrent...'
-    var elements = [(
+    const name = torrentSummary.name || 'Loading torrent...'
+    const elements = [(
       <div key='name' className='name ellipsis'>{name}</div>
     )]
 
     // If it's downloading/seeding then show progress info
-    var prog = torrentSummary.progress
+    const prog = torrentSummary.progress
+    let progElems
     if (torrentSummary.error) {
-      elements.push(
-        <div key='progress-info' className='ellipsis'>
-          {getErrorMessage(torrentSummary)}
-        </div>
-      )
+      progElems = [getErrorMessage(torrentSummary)]
     } else if (torrentSummary.status !== 'paused' && prog) {
-      elements.push(
-        <div key='progress-info' className='ellipsis'>
-          {renderPercentProgress()}
-          {renderTotalProgress()}
-          {renderPeers()}
-          {renderDownloadSpeed()}
-          {renderUploadSpeed()}
-          {renderEta()}
+      progElems = [
+        renderDownloadCheckbox(),
+        renderTorrentStatus(),
+        renderProgressBar(),
+        renderPercentProgress(),
+        renderTotalProgress(),
+        renderPeers(),
+        renderSpeeds(),
+        renderEta()
+      ]
+    } else {
+      progElems = [
+        renderDownloadCheckbox(),
+        renderTorrentStatus()
+      ]
+    }
+    elements.push(
+      <div key='progress-info' className='ellipsis'>
+        {progElems}
+      </div>
+    )
+
+    return (<div key='metadata' className='metadata'>{elements}</div>)
+
+    function renderDownloadCheckbox () {
+      const infoHash = torrentSummary.infoHash
+      const isActive = ['downloading', 'seeding'].includes(torrentSummary.status)
+      return (
+        <Checkbox
+          key='download-button'
+          className={'control download ' + torrentSummary.status}
+          style={{
+            display: 'inline-block',
+            width: 32
+          }}
+          iconStyle={{
+            width: 20,
+            height: 20
+          }}
+          checked={isActive}
+          onClick={stopPropagation}
+          onCheck={dispatcher('toggleTorrent', infoHash)} />
+      )
+    }
+
+    function renderProgressBar () {
+      const progress = Math.floor(100 * prog.progress)
+      const styles = {
+        wrapper: {
+          display: 'inline-block',
+          marginRight: 8
+        },
+        progress: {
+          height: 8,
+          width: 30
+        }
+      }
+      return (
+        <div style={styles.wrapper}>
+          <LinearProgress style={styles.progress} mode='determinate' value={progress} />
         </div>
       )
     }
 
-    return (<div key='metadata' className='metadata'>{elements}</div>)
-
     function renderPercentProgress () {
-      var progress = Math.floor(100 * prog.progress)
+      const progress = Math.floor(100 * prog.progress)
       return (<span key='percent-progress'>{progress}%</span>)
     }
 
     function renderTotalProgress () {
-      var downloaded = prettyBytes(prog.downloaded)
-      var total = prettyBytes(prog.length || 0)
+      const downloaded = prettyBytes(prog.downloaded)
+      const total = prettyBytes(prog.length || 0)
       if (downloaded === total) {
         return (<span key='total-progress'>{downloaded}</span>)
       } else {
@@ -122,112 +170,78 @@ module.exports = class TorrentList extends React.Component {
 
     function renderPeers () {
       if (prog.numPeers === 0) return
-      var count = prog.numPeers === 1 ? 'peer' : 'peers'
+      const count = prog.numPeers === 1 ? 'peer' : 'peers'
       return (<span key='peers'>{prog.numPeers} {count}</span>)
     }
 
-    function renderDownloadSpeed () {
-      if (prog.downloadSpeed === 0) return
-      return (<span key='download'>↓ {prettyBytes(prog.downloadSpeed)}/s</span>)
-    }
-
-    function renderUploadSpeed () {
-      if (prog.uploadSpeed === 0) return
-      return (<span key='upload'>↑ {prettyBytes(prog.uploadSpeed)}/s</span>)
+    function renderSpeeds () {
+      let str = ''
+      if (prog.downloadSpeed > 0) str += ' ↓ ' + prettyBytes(prog.downloadSpeed) + '/s'
+      if (prog.uploadSpeed > 0) str += ' ↑ ' + prettyBytes(prog.uploadSpeed) + '/s'
+      if (str === '') return
+      return (<span key='download'>{str}</span>)
     }
 
     function renderEta () {
-      var downloaded = prog.downloaded
-      var total = prog.length || 0
-      var missing = total - downloaded
-      var downloadSpeed = prog.downloadSpeed
+      const downloaded = prog.downloaded
+      const total = prog.length || 0
+      const missing = total - downloaded
+      const downloadSpeed = prog.downloadSpeed
       if (downloadSpeed === 0 || missing === 0) return
 
-      var rawEta = missing / downloadSpeed
-      var hours = Math.floor(rawEta / 3600) % 24
-      var minutes = Math.floor(rawEta / 60) % 60
-      var seconds = Math.floor(rawEta % 60)
+      const rawEta = missing / downloadSpeed
+      const hours = Math.floor(rawEta / 3600) % 24
+      const minutes = Math.floor(rawEta / 60) % 60
+      const seconds = Math.floor(rawEta % 60)
 
       // Only display hours and minutes if they are greater than 0 but always
       // display minutes if hours is being displayed
-      var hoursStr = hours ? hours + 'h' : ''
-      var minutesStr = (hours || minutes) ? minutes + 'm' : ''
-      var secondsStr = seconds + 's'
+      const hoursStr = hours ? hours + 'h' : ''
+      const minutesStr = (hours || minutes) ? minutes + 'm' : ''
+      const secondsStr = seconds + 's'
 
-      return (<span>ETA: {hoursStr} {minutesStr} {secondsStr}</span>)
+      return (<span>{hoursStr} {minutesStr} {secondsStr} remaining</span>)
+    }
+
+    function renderTorrentStatus () {
+      let status
+      if (torrentSummary.status === 'paused') {
+        if (!torrentSummary.progress) status = ''
+        else if (torrentSummary.progress.progress === 1) status = 'Not seeding'
+        else status = 'Paused'
+      } else if (torrentSummary.status === 'downloading') {
+        status = 'Downloading'
+      } else if (torrentSummary.status === 'seeding') {
+        status = 'Seeding'
+      } else { // torrentSummary.status is 'new' or something unexpected
+        status = ''
+      }
+      return (<span>{status}</span>)
     }
   }
 
   // Download button toggles between torrenting (DL/seed) and paused
   // Play button starts streaming the torrent immediately, unpausing if needed
   renderTorrentButtons (torrentSummary) {
-    var infoHash = torrentSummary.infoHash
-
-    var playIcon, playTooltip, playClass
-    if (torrentSummary.playStatus === 'timeout') {
-      playIcon = 'warning'
-      playTooltip = 'Playback timed out. No seeds? No internet? Click to try again.'
-    } else {
-      playIcon = 'play_arrow'
-      playTooltip = 'Start streaming'
-    }
-
-    var downloadIcon, downloadTooltip
-    if (torrentSummary.status === 'seeding') {
-      downloadIcon = 'file_upload'
-      downloadTooltip = 'Seeding. Click to stop.'
-    } else if (torrentSummary.status === 'downloading') {
-      downloadIcon = 'file_download'
-      downloadTooltip = 'Torrenting. Click to stop.'
-    } else {
-      downloadIcon = 'file_download'
-      downloadTooltip = 'Click to start torrenting.'
-    }
+    const infoHash = torrentSummary.infoHash
 
     // Only show the play/dowload buttons for torrents that contain playable media
-    var playButton, downloadButton, positionElem
-    if (!torrentSummary.error) {
-      downloadButton = (
+    let playButton
+    if (!torrentSummary.error && TorrentPlayer.isPlayableTorrentSummary(torrentSummary)) {
+      playButton = (
         <i
-          key='download-button'
-          className={'button-round icon download ' + torrentSummary.status}
-          title={downloadTooltip}
-          onClick={dispatcher('toggleTorrent', infoHash)}
-        >
-          {downloadIcon}
+          key='play-button'
+          title='Start streaming'
+          className={'icon play'}
+          onClick={dispatcher('playFile', infoHash)}>
+          play_circle_outline
         </i>
       )
-
-      // Do we have a saved position? Show it using a radial progress bar on top
-      // of the play button, unless already showing a spinner there:
-      var willShowSpinner = torrentSummary.playStatus === 'requested'
-      var defaultFile = torrentSummary.files &&
-        torrentSummary.files[torrentSummary.defaultPlayFileIndex]
-      if (defaultFile && defaultFile.currentTime && !willShowSpinner) {
-        var fraction = defaultFile.currentTime / defaultFile.duration
-        positionElem = this.renderRadialProgressBar(fraction, 'radial-progress-large')
-        playClass = 'resume-position'
-      }
-
-      if (TorrentPlayer.isPlayableTorrentSummary(torrentSummary)) {
-        playButton = (
-          <i
-            key='play-button'
-            title={playTooltip}
-            className={'button-round icon play ' + playClass}
-            onClick={dispatcher('playFile', infoHash)}
-          >
-            {playIcon}
-          </i>
-        )
-      }
     }
 
     return (
-      <div key='buttons' className='buttons'>
-        {positionElem}
+      <div className='torrent-controls'>
         {playButton}
-        {downloadButton}
         <i
           key='delete-button'
           className='icon delete'
@@ -241,9 +255,9 @@ module.exports = class TorrentList extends React.Component {
 
   // Show files, per-file download status and play buttons, and so on
   renderTorrentDetails (torrentSummary) {
-    var filesElement
+    let filesElement
     if (torrentSummary.error || !torrentSummary.files) {
-      var message = ''
+      let message = ''
       if (torrentSummary.error === 'path-missing') {
         // Special case error: this torrent's download dir or file is missing
         message = 'Missing path: ' + TorrentSummary.getFileOrFolder(torrentSummary)
@@ -264,14 +278,9 @@ module.exports = class TorrentList extends React.Component {
       )
     } else {
       // We do know the files. List them and show download stats for each one
-      var fileRows = torrentSummary.files
+      const fileRows = torrentSummary.files
         .filter((file) => !file.path.includes('/.____padding_file/'))
         .map((file, index) => ({ file, index }))
-        .sort(function (a, b) {
-          if (a.file.name < b.file.name) return -1
-          if (b.file.name < a.file.name) return 1
-          return 0
-        })
         .map((object) => this.renderFileRow(torrentSummary, object.file, object.index))
 
       filesElement = (
@@ -296,28 +305,28 @@ module.exports = class TorrentList extends React.Component {
   renderFileRow (torrentSummary, file, index) {
     // First, find out how much of the file we've downloaded
     // Are we even torrenting it?
-    var isSelected = torrentSummary.selections && torrentSummary.selections[index]
-    var isDone = false // Are we finished torrenting it?
-    var progress = ''
+    const isSelected = torrentSummary.selections && torrentSummary.selections[index]
+    let isDone = false // Are we finished torrenting it?
+    let progress = ''
     if (torrentSummary.progress && torrentSummary.progress.files &&
         torrentSummary.progress.files[index]) {
-      var fileProg = torrentSummary.progress.files[index]
+      const fileProg = torrentSummary.progress.files[index]
       isDone = fileProg.numPiecesPresent === fileProg.numPieces
       progress = Math.round(100 * fileProg.numPiecesPresent / fileProg.numPieces) + '%'
     }
 
     // Second, for media files where we saved our position, show how far we got
-    var positionElem
+    let positionElem
     if (file.currentTime) {
       // Radial progress bar. 0% = start from 0:00, 270% = 3/4 of the way thru
       positionElem = this.renderRadialProgressBar(file.currentTime / file.duration)
     }
 
     // Finally, render the file as a table row
-    var isPlayable = TorrentPlayer.isPlayable(file)
-    var infoHash = torrentSummary.infoHash
-    var icon
-    var handleClick
+    const isPlayable = TorrentPlayer.isPlayable(file)
+    const infoHash = torrentSummary.infoHash
+    let icon
+    let handleClick
     if (isPlayable) {
       icon = 'play_arrow' /* playable? add option to play */
       handleClick = dispatcher('playFile', infoHash, index)
@@ -328,7 +337,7 @@ module.exports = class TorrentList extends React.Component {
         : (e) => e.stopPropagation() // noop if file is not ready
     }
     // TODO: add a css 'disabled' class to indicate that a file cannot be opened/streamed
-    var rowClass = ''
+    let rowClass = ''
     if (!isSelected) rowClass = 'disabled' // File deselected, not being torrented
     if (!isDone && !isPlayable) rowClass = 'disabled' // Can't open yet, can't stream
     return (
@@ -348,16 +357,16 @@ module.exports = class TorrentList extends React.Component {
         </td>
         <td className='col-select'
           onClick={dispatcher('toggleTorrentFile', infoHash, index)}>
-          <i className='icon'>{isSelected ? 'close' : 'add'}</i>
+          <i className='icon deselect-file'>{isSelected ? 'close' : 'add'}</i>
         </td>
       </tr>
     )
   }
 
   renderRadialProgressBar (fraction, cssClass) {
-    var rotation = 360 * fraction
-    var transformFill = {transform: 'rotate(' + (rotation / 2) + 'deg)'}
-    var transformFix = {transform: 'rotate(' + rotation + 'deg)'}
+    const rotation = 360 * fraction
+    const transformFill = {transform: 'rotate(' + (rotation / 2) + 'deg)'}
+    const transformFix = {transform: 'rotate(' + rotation + 'deg)'}
 
     return (
       <div key='radial-progress' className={'radial-progress ' + cssClass}>
@@ -376,8 +385,12 @@ module.exports = class TorrentList extends React.Component {
   }
 }
 
+function stopPropagation (e) {
+  e.stopPropagation()
+}
+
 function getErrorMessage (torrentSummary) {
-  var err = torrentSummary.error
+  const err = torrentSummary.error
   if (err === 'path-missing') {
     return (
       <span>

src/renderer/webtorrent.js

@@ -2,26 +2,28 @@
 // process from the main window.
 console.time('init')
 
-var crypto = require('crypto')
-var deepEqual = require('deep-equal')
-var defaultAnnounceList = require('create-torrent').announceList
-var electron = require('electron')
-var fs = require('fs-extra')
-var musicmetadata = require('musicmetadata')
-var networkAddress = require('network-address')
-var path = require('path')
-var WebTorrent = require('webtorrent')
-var zeroFill = require('zero-fill')
+const crypto = require('crypto')
+const deepEqual = require('deep-equal')
+const defaultAnnounceList = require('create-torrent').announceList
+const electron = require('electron')
+const fs = require('fs')
+const mkdirp = require('mkdirp')
+const musicmetadata = require('musicmetadata')
+const networkAddress = require('network-address')
+const path = require('path')
+const WebTorrent = require('webtorrent')
+const zeroFill = require('zero-fill')
 
-var crashReporter = require('../crash-reporter')
-var config = require('../config')
-var torrentPoster = require('./lib/torrent-poster')
+const crashReporter = require('../crash-reporter')
+const config = require('../config')
+const {TorrentKeyNotFoundError} = require('./lib/errors')
+const torrentPoster = require('./lib/torrent-poster')
 
 // Report when the process crashes
 crashReporter.init()
 
 // Send & receive messages from the main window
-var ipc = electron.ipcRenderer
+const ipc = electron.ipcRenderer
 
 // Force use of webtorrent trackers on all torrents
 global.WEBTORRENT_ANNOUNCE = defaultAnnounceList
@@ -31,7 +33,7 @@ global.WEBTORRENT_ANNOUNCE = defaultAnnounceList
 /**
  * WebTorrent version.
  */
-var VERSION = require('../../package.json').version
+const VERSION = require('../../package.json').version
 
 /**
  * Version number in Azureus-style. Generated from major and minor semver version.
@@ -39,7 +41,7 @@ var VERSION = require('../../package.json').version
  *   '0.16.1' -> '0016'
  *   '1.2.5' -> '0102'
  */
-var VERSION_STR = VERSION.match(/([0-9]+)/g)
+const VERSION_STR = VERSION.match(/([0-9]+)/g)
   .slice(0, 2)
   .map((v) => zeroFill(2, v))
   .join('')
@@ -51,25 +53,27 @@ var VERSION_STR = VERSION.match(/([0-9]+)/g)
  * For example:
  *   '-WW0102-'...
  */
-var VERSION_PREFIX = '-WD' + VERSION_STR + '-'
+const VERSION_PREFIX = '-WD' + VERSION_STR + '-'
+
+/**
+ * Generate an ephemeral peer ID each time.
+ */
+const PEER_ID = Buffer.from(VERSION_PREFIX + crypto.randomBytes(9).toString('base64'))
 
 // Connect to the WebTorrent and BitTorrent networks. WebTorrent Desktop is a hybrid
 // client, as explained here: https://webtorrent.io/faq
-var client = window.client = new WebTorrent({
-  peerId: Buffer.from(VERSION_PREFIX + crypto.randomBytes(6).toString('hex'))
-})
+let client = window.client = new WebTorrent({ peerId: PEER_ID })
 
 // WebTorrent-to-HTTP streaming sever
-var server = null
+let server = null
 
 // Used for diffing, so we only send progress updates when necessary
-var prevProgress = null
+let prevProgress = null
 
 init()
 
 function init () {
-  client.on('warning', (err) => ipc.send('wt-warning', null, err.message))
-  client.on('error', (err) => ipc.send('wt-error', null, err.message))
+  listenToClientEvents()
 
   ipc.on('wt-start-torrenting', (e, torrentKey, torrentID, path, fileModtimes, selections) =>
     startTorrenting(torrentKey, torrentID, path, fileModtimes, selections))
@@ -83,8 +87,8 @@ function init () {
     generateTorrentPoster(torrentKey))
   ipc.on('wt-get-audio-metadata', (e, infoHash, index) =>
     getAudioMetadata(infoHash, index))
-  ipc.on('wt-start-server', (e, infoHash, index) =>
-    startServer(infoHash, index))
+  ipc.on('wt-start-server', (e, infoHash) =>
+    startServer(infoHash))
   ipc.on('wt-stop-server', (e) =>
     stopServer())
   ipc.on('wt-select-files', (e, infoHash, selections) =>
@@ -100,12 +104,17 @@ function init () {
   console.timeEnd('init')
 }
 
-// Starts a given TorrentID, which can be an infohash, magnet URI, etc. Returns WebTorrent object
-// See https://github.com/feross/webtorrent/blob/master/docs/api.md#clientaddtorrentid-opts-function-ontorrent-torrent-
+function listenToClientEvents () {
+  client.on('warning', (err) => ipc.send('wt-warning', null, err.message))
+  client.on('error', (err) => ipc.send('wt-error', null, err.message))
+}
+
+// Starts a given TorrentID, which can be an infohash, magnet URI, etc.
+// Returns a WebTorrent object. See https://git.io/vik9M
 function startTorrenting (torrentKey, torrentID, path, fileModtimes, selections) {
   console.log('starting torrent %s: %s', torrentKey, torrentID)
 
-  var torrent = client.add(torrentID, {
+  const torrent = client.add(torrentID, {
     path: path,
     fileModtimes: fileModtimes
   })
@@ -116,20 +125,19 @@ function startTorrenting (torrentKey, torrentID, path, fileModtimes, selections)
 
   // Only download the files the user wants, not necessarily all files
   torrent.once('ready', () => selectFiles(torrent, selections))
-
-  return torrent
 }
 
 function stopTorrenting (infoHash) {
-  var torrent = client.get(infoHash)
+  console.log('--- STOP TORRENTING: ', infoHash)
+  const torrent = client.get(infoHash)
   if (torrent) torrent.destroy()
 }
 
 // Create a new torrent, start seeding
 function createTorrent (torrentKey, options) {
   console.log('creating torrent', torrentKey, options)
-  var paths = options.files.map((f) => f.path)
-  var torrent = client.seed(paths, options)
+  const paths = options.files.map((f) => f.path)
+  const torrent = client.seed(paths, options)
   torrent.key = torrentKey
   addTorrentEvents(torrent)
   ipc.send('wt-new-torrent')
@@ -147,22 +155,22 @@ function addTorrentEvents (torrent) {
   torrent.on('done', torrentDone)
 
   function torrentMetadata () {
-    var info = getTorrentInfo(torrent)
+    const info = getTorrentInfo(torrent)
     ipc.send('wt-metadata', torrent.key, info)
 
     updateTorrentProgress()
   }
 
   function torrentReady () {
-    var info = getTorrentInfo(torrent)
+    const info = getTorrentInfo(torrent)
     ipc.send('wt-ready', torrent.key, info)
-    ipc.send('wt-ready-' + torrent.infoHash, torrent.key, info) // TODO: hack
+    ipc.send('wt-ready-' + torrent.infoHash, torrent.key, info)
 
     updateTorrentProgress()
   }
 
   function torrentDone () {
-    var info = getTorrentInfo(torrent)
+    const info = getTorrentInfo(torrent)
     ipc.send('wt-done', torrent.key, info)
 
     updateTorrentProgress()
@@ -195,19 +203,22 @@ function getTorrentFileInfo (file) {
   }
 }
 
-// Every time we resolve a magnet URI, save the torrent file so that we never
-// have to download it again. Never ask the DHT the same question twice.
+// Every time we resolve a magnet URI, save the torrent file so that we can use
+// it on next startup. Starting with the full torrent metadata will be faster
+// than re-fetching it from peers using ut_metadata.
 function saveTorrentFile (torrentKey) {
-  var torrent = getTorrent(torrentKey)
-  checkIfTorrentFileExists(torrent.infoHash, function (torrentPath, exists) {
-    var fileName = torrent.infoHash + '.torrent'
-    if (exists) {
+  const torrent = getTorrent(torrentKey)
+  const torrentPath = path.join(config.TORRENT_PATH, torrent.infoHash + '.torrent')
+
+  fs.access(torrentPath, fs.constants.R_OK, function (err) {
+    const fileName = torrent.infoHash + '.torrent'
+    if (!err) {
       // We've already saved the file
       return ipc.send('wt-file-saved', torrentKey, fileName)
     }
 
     // Otherwise, save the .torrent file, under the app config folder
-    fs.mkdir(config.TORRENT_PATH, function (_) {
+    mkdirp(config.TORRENT_PATH, function (_) {
       fs.writeFile(torrentPath, torrent.torrentFile, function (err) {
         if (err) return console.log('error saving torrent file %s: %o', torrentPath, err)
         console.log('saved torrent file %s', torrentPath)
@@ -217,26 +228,17 @@ function saveTorrentFile (torrentKey) {
   })
 }
 
-// Checks whether we've already resolved a given infohash to a torrent file
-// Calls back with (torrentPath, exists). Logs, does not call back on error
-function checkIfTorrentFileExists (infoHash, cb) {
-  var torrentPath = path.join(config.TORRENT_PATH, infoHash + '.torrent')
-  fs.exists(torrentPath, function (exists) {
-    cb(torrentPath, exists)
-  })
-}
-
 // Save a JPG that represents a torrent.
 // Auto chooses either a frame from a video file, an image, etc
 function generateTorrentPoster (torrentKey) {
-  var torrent = getTorrent(torrentKey)
+  const torrent = getTorrent(torrentKey)
   torrentPoster(torrent, function (err, buf, extension) {
     if (err) return console.log('error generating poster: %o', err)
     // save it for next time
-    fs.mkdirp(config.POSTER_PATH, function (err) {
+    mkdirp(config.POSTER_PATH, function (err) {
       if (err) return console.log('error creating poster dir: %o', err)
-      var posterFileName = torrent.infoHash + extension
-      var posterFilePath = path.join(config.POSTER_PATH, posterFileName)
+      const posterFileName = torrent.infoHash + extension
+      const posterFilePath = path.join(config.POSTER_PATH, posterFileName)
       fs.writeFile(posterFilePath, buf, function (err) {
         if (err) return console.log('error saving poster: %o', err)
         // show the poster
@@ -247,7 +249,7 @@ function generateTorrentPoster (torrentKey) {
 }
 
 function updateTorrentProgress () {
-  var progress = getTorrentProgress()
+  const progress = getTorrentProgress()
   // TODO: diff torrent-by-torrent, not once for the whole update
   if (prevProgress && deepEqual(progress, prevProgress, {strict: true})) {
     return /* don't send heavy object if it hasn't changed */
@@ -258,19 +260,19 @@ function updateTorrentProgress () {
 
 function getTorrentProgress () {
   // First, track overall progress
-  var progress = client.progress
-  var hasActiveTorrents = client.torrents.some(function (torrent) {
+  const progress = client.progress
+  const hasActiveTorrents = client.torrents.some(function (torrent) {
     return torrent.progress !== 1
   })
 
   // Track progress for every file in each torrent
   // TODO: ideally this would be tracked by WebTorrent, which could do it
   // more efficiently than looping over torrent.bitfield
-  var torrentProg = client.torrents.map(function (torrent) {
-    var fileProg = torrent.files && torrent.files.map(function (file, index) {
-      var numPieces = file._endPiece - file._startPiece + 1
-      var numPiecesPresent = 0
-      for (var piece = file._startPiece; piece <= file._endPiece; piece++) {
+  const torrentProg = client.torrents.map(function (torrent) {
+    const fileProg = torrent.files && torrent.files.map(function (file, index) {
+      const numPieces = file._endPiece - file._startPiece + 1
+      let numPiecesPresent = 0
+      for (let piece = file._startPiece; piece <= file._endPiece; piece++) {
         if (torrent.bitfield.get(piece)) numPiecesPresent++
       }
       return {
@@ -301,28 +303,28 @@ function getTorrentProgress () {
   }
 }
 
-function startServer (infoHash, index) {
-  var torrent = client.get(infoHash)
-  if (torrent.ready) startServerFromReadyTorrent(torrent, index)
-  else torrent.once('ready', () => startServerFromReadyTorrent(torrent, index))
+function startServer (infoHash) {
+  const torrent = client.get(infoHash)
+  if (torrent.ready) startServerFromReadyTorrent(torrent)
+  else torrent.once('ready', () => startServerFromReadyTorrent(torrent))
 }
 
-function startServerFromReadyTorrent (torrent, index, cb) {
+function startServerFromReadyTorrent (torrent, cb) {
   if (server) return
 
   // start the streaming torrent-to-http server
   server = torrent.createServer()
   server.listen(0, function () {
-    var port = server.address().port
-    var urlSuffix = ':' + port + '/' + index
-    var info = {
+    const port = server.address().port
+    const urlSuffix = ':' + port
+    const info = {
       torrentKey: torrent.key,
       localURL: 'http://localhost' + urlSuffix,
       networkURL: 'http://' + networkAddress() + urlSuffix
     }
 
     ipc.send('wt-server-running', info)
-    ipc.send('wt-server-' + torrent.infoHash, info) // TODO: hack
+    ipc.send('wt-server-' + torrent.infoHash, info)
   })
 }
 
@@ -333,23 +335,28 @@ function stopServer () {
 }
 
 function getAudioMetadata (infoHash, index) {
-  var torrent = client.get(infoHash)
-  var file = torrent.files[index]
+  const torrent = client.get(infoHash)
+  const file = torrent.files[index]
   musicmetadata(file.createReadStream(), function (err, info) {
-    if (err) return
-    console.log('got audio metadata for %s: %o', file.name, info)
-    ipc.send('wt-audio-metadata', infoHash, index, info)
+    if (err) return console.log('error getting audio metadata for ' + infoHash + ':' + index, err)
+    const { artist, album, albumartist, title, year, track, disk, genre } = info
+    const importantInfo = { artist, album, albumartist, title, year, track, disk, genre }
+    console.log('got audio metadata for %s: %o', file.name, importantInfo)
+    ipc.send('wt-audio-metadata', infoHash, index, importantInfo)
   })
 }
 
 function selectFiles (torrentOrInfoHash, selections) {
   // Get the torrent object
-  var torrent
+  let torrent
   if (typeof torrentOrInfoHash === 'string') {
     torrent = client.get(torrentOrInfoHash)
   } else {
     torrent = torrentOrInfoHash
   }
+  if (!torrent) {
+    throw new Error('selectFiles: missing torrent ' + torrentOrInfoHash)
+  }
 
   // Selections not specified?
   // Load all files. We still need to replace the default whole-torrent
@@ -369,8 +376,8 @@ function selectFiles (torrentOrInfoHash, selections) {
   torrent.deselect(0, torrent.pieces.length - 1, false)
 
   // Add selections (individual files)
-  for (var i = 0; i < selections.length; i++) {
-    var file = torrent.files[i]
+  for (let i = 0; i < selections.length; i++) {
+    const file = torrent.files[i]
     if (selections[i]) {
       file.select()
     } else {
@@ -383,11 +390,25 @@ function selectFiles (torrentOrInfoHash, selections) {
 // Gets a WebTorrent handle by torrentKey
 // Throws an Error if we're not currently torrenting anything w/ that key
 function getTorrent (torrentKey) {
-  var ret = client.torrents.find((x) => x.key === torrentKey)
-  if (!ret) throw new Error('missing torrent key ' + torrentKey)
+  const ret = client.torrents.find((x) => x.key === torrentKey)
+  if (!ret) throw new TorrentKeyNotFoundError(torrentKey)
   return ret
 }
 
 function onError (err) {
   console.log(err)
 }
+
+// TODO: remove this once the following bugs are fixed:
+// https://bugs.chromium.org/p/chromium/issues/detail?id=490143
+// https://github.com/electron/electron/issues/7212
+window.testOfflineMode = function () {
+  console.log('Test, going OFFLINE')
+  client = window.client = new WebTorrent({
+    peerId: PEER_ID,
+    tracker: false,
+    dht: false,
+    webSeeds: false
+  })
+  listenToClientEvents()
+}