Refactor main.js: controllers.playback.skip() (#706)

* Fixes bug with Step Forward/Backward commands not working

* Fix 'invalid torrent identifier' error

renderer/controllers/playback-controller.js

@@ -86,6 +86,11 @@ module.exports = class PlaybackController {
     ipcRenderer.send('onPlayerPause')
   }
 
+  // Skip specified number of seconds (backwards if negative)
+  skip (time) {
+    this.skipTo(this.state.playing.currentTime + time)
+  }
+
   // Skip (aka seek) to a specific point, in seconds
   skipTo (time) {
     if (isCasting(this.state)) Cast.seek(time)

renderer/controllers/torrent-list-controller.js

@@ -65,12 +65,30 @@ module.exports = class TorrentListController {
     })
   }
 
+  // Starts downloading and/or seeding a given torrentSummary.
+  startTorrentingSummary (torrentSummary) {
+    var s = torrentSummary
+
+    // Backward compatibility for config files save before we had torrentKey
+    if (!s.torrentKey) s.torrentKey = this.state.nextTorrentKey++
+
+    // Use Downloads folder by default
+    if (!s.path) s.path = this.state.saved.prefs.downloadPath
+
+    ipcRenderer.send('wt-start-torrenting',
+                      s.torrentKey,
+                      TorrentSummary.getTorrentID(s),
+                      s.path,
+                      s.fileModtimes,
+                      s.selections)
+  }
+
   // TODO: use torrentKey, not infoHash
   toggleTorrent (infoHash) {
     var torrentSummary = TorrentSummary.getByKey(this.state, infoHash)
     if (torrentSummary.status === 'paused') {
       torrentSummary.status = 'new'
-      ipcRenderer.send('wt-start-torrenting', torrentSummary)
+      this.startTorrentingSummary(torrentSummary)
       sound.play('ENABLE')
     } else {
       torrentSummary.status = 'paused'