feat(tracker): save recovery file regularly & load it on startup

cmd/sointu-track/main.go

@@ -33,7 +33,10 @@ func main() {
 	defer audioContext.Close()
 	modelMessages := make(chan interface{}, 1024)
 	playerMessages := make(chan tracker.PlayerMessage, 1024)
-	model := tracker.NewModel(modelMessages, playerMessages)
+	model, err := tracker.LoadRecovery(modelMessages, playerMessages)
+	if err != nil {
+		model = tracker.NewModel(modelMessages, playerMessages)
+	}
 	player := tracker.NewPlayer(cmd.DefaultService, playerMessages, modelMessages)
 	tracker := gioui.NewTracker(model, cmd.DefaultService)
 	output := audioContext.Output()

cmd/sointu-vsti/main.go

@@ -49,7 +49,10 @@ func init() {
 	vst2.PluginAllocator = func(h vst2.Host) (vst2.Plugin, vst2.Dispatcher) {
 		modelMessages := make(chan interface{}, 1024)
 		playerMessages := make(chan tracker.PlayerMessage, 1024)
-		model := tracker.NewModel(modelMessages, playerMessages)
+		model, err := tracker.LoadRecovery(modelMessages, playerMessages)
+		if err != nil {
+			model = tracker.NewModel(modelMessages, playerMessages)
+		}
 		player := tracker.NewPlayer(cmd.DefaultService, playerMessages, modelMessages)
 		tracker := gioui.NewTracker(model, cmd.DefaultService)
 		tracker.SetInstrEnlarged(true) // start the vsti with the instrument editor enlarged

tracker/gioui/tracker.go

@@ -148,8 +148,6 @@ func NewTracker(model *tracker.Model, synthService sointu.SynthService) *Tracker
 	t.Theme.Palette.Fg = primaryColor
 	t.Theme.Palette.ContrastFg = black
 	t.TrackEditor.Focus()
-	t.SetOctave(4)
-	t.ResetSong()
 	t.quitWG.Add(1)
 	return t
 }
@@ -160,6 +158,7 @@ func (t *Tracker) Main() {
 		app.Size(unit.Dp(800), unit.Dp(600)),
 		app.Title("Sointu Tracker"),
 	)
+	recoveryTicker := time.NewTicker(time.Second * 10)
 	t.Explorer = explorer.NewExplorer(w)
 	var ops op.Ops
 mainloop:
@@ -180,6 +179,7 @@ mainloop:
 		}
 		select {
 		case <-t.quitChannel:
+			recoveryTicker.Stop()
 			break mainloop
 		case e := <-t.errorChannel:
 			t.Alert.Update(e.Error(), Error, time.Second*5)
@@ -211,9 +211,12 @@ mainloop:
 				t.Layout(gtx, w)
 				e.Frame(gtx.Ops)
 			}
+		case <-recoveryTicker.C:
+			go t.SaveRecovery()
 		}
 	}
 	w.Perform(system.ActionClose)
+	t.SaveRecovery()
 	t.quitWG.Done()
 }
 

tracker/player.go

@@ -296,6 +296,9 @@ loop:
 }
 
 func (p *Player) compileOrUpdateSynth() {
+	if p.bpm <= 0 {
+		return // bpm not set yet
+	}
 	if p.synth != nil {
 		err := p.synth.Update(p.patch, p.bpm)
 		if err != nil {