Save audio metadata, after extraction

Fixes #260

renderer/index.js

@@ -712,16 +712,21 @@ function startServerFromReadyTorrent (torrent, index, cb) {
   // update state
   state.playing.infoHash = torrent.infoHash
   state.playing.fileIndex = index
-  state.playing.type = TorrentPlayer.isVideo(file) ? 'video' : 'audio'
-  state.playing.audioInfo = null
+  state.playing.type = TorrentPlayer.isVideo(file) ? 'video'
+    : TorrentPlayer.isAudio(file) ? 'audio'
+    : 'other'
 
   // if it's audio, parse out the metadata (artist, title, etc)
-  musicmetadata(file.createReadStream(), function (err, info) {
-    if (err) return
-    console.log('got audio metadata for %s: %v', file.name, info)
-    state.playing.audioInfo = info
-    update()
-  })
+  var torrentSummary = getTorrentSummary(torrent.infoHash)
+  var fileSummary = torrentSummary.files[index]
+  if (state.playing.type === 'audio' && !fileSummary.audioInfo) {
+    musicmetadata(file.createReadStream(), function (err, info) {
+      if (err) return
+      console.log('got audio metadata for %s: %o', file.name, info)
+      fileSummary.audioInfo = info
+      update()
+    })
+  }
 
   // either way, start a streaming torrent-to-http server
   var server = torrent.createServer()
@@ -777,6 +782,7 @@ function openPlayer (infoHash, index, cb) {
 
   var timeout = setTimeout(function () {
     torrentSummary.playStatus = 'timeout' /* no seeders available? */
+    state.navigation.clearPending()
     playInterfaceSound('ERROR')
     update()
   }, 10000) /* give it a few seconds */

renderer/lib/location-history.js

@@ -19,6 +19,7 @@ LocationHistory.prototype._go = function (page) {
     this._pending = page
     page.onbeforeload((err) => {
       if (err) return
+      if (this._pending !== page) return /* navigation was cancelled */
       this._pending = null
       this._history.push(page)
     })
@@ -67,3 +68,7 @@ LocationHistory.prototype.hasForward = function () {
 LocationHistory.prototype.pending = function () {
   return this._pending
 }
+
+LocationHistory.prototype.clearPending = function () {
+  this._pending = null
+}

renderer/state.js

@@ -24,7 +24,7 @@ module.exports = {
     infoHash: null, /* the info hash of the torrent we're playing */
     fileIndex: null, /* the zero-based index within the torrent */
     location: 'local', /* 'local', 'chromecast', 'airplay' */
-    type: null, /* 'audio' or 'video' */
+    type: null, /* 'audio' or 'video', could be 'other' if ever support eg streaming to VLC */
     currentTime: 0, /* seconds */
     duration: 1, /* seconds */
     isPaused: true,
@@ -32,7 +32,6 @@ module.exports = {
     lastTimeUpdate: 0, /* Unix time in ms */
     mouseStationarySince: 0 /* Unix time in ms */
   },
-  audioInfo: null, /* set whenever an audio file is playing */
   pendingTorrents: {}, /* infohash to WebTorrent handle */
   devices: { /* playback devices like Chromecast and AppleTV */
     airplay: null, /* airplay client. finds and manages AppleTVs */

renderer/views/player.js

@@ -122,14 +122,15 @@ function renderOverlay (state) {
 }
 
 function renderAudioMetadata (state) {
-  if (!state.playing.audioInfo) return
-  var info = state.playing.audioInfo
+  var torrentSummary = getPlayingTorrentSummary(state)
+  var fileSummary = torrentSummary.files[state.playing.fileIndex]
+  if (!fileSummary.audioInfo) return
+  var info = fileSummary.audioInfo
 
   // Get audio track info
   var title = info.title
   if (!title) {
-    var torrentSummary = getPlayingTorrentSummary(state)
-    title = torrentSummary.files[state.playing.fileIndex].name
+    title = fileSummary.name
   }
   var artist = info.artist && info.artist[0]
   var album = info.album