Announce finished and failed downloads in the background (M10)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/ui/app.go

@@ -44,6 +44,10 @@ type App struct {
 	state    map[string]serviceState // keyed by service name
 	probes   []probe
 
+	screen     tcell.Screen // remembered at the first draw, for the bell
+	sab        *sabnzbd.Client
+	notifyDone bool // announce finished downloads
+	bell       bool
 	covers     bool // poster thumbnails enabled
 	coverStyle coverStyle
 	coverCache *coverCache
@@ -90,6 +94,8 @@ func New(cfg *config.Config) *App {
 		services: tview.NewTextView().SetDynamicColors(true).SetTextAlign(tview.AlignRight),
 		state:    map[string]serviceState{},
 
+		notifyDone: cfg.UI.ShouldNotifyDownloads(),
+		bell:       cfg.UI.Bell,
 		covers:     cfg.UI.ShowCovers(),
 		coverStyle: coverStyleFor(cfg.UI.CoverStyle, os.Getenv),
 		coverCache: newCoverCache(),
@@ -99,6 +105,7 @@ func New(cfg *config.Config) *App {
 	sonarrClient := sonarr.NewClient(cfg.Sonarr.URL, cfg.Sonarr.APIKey)
 	a.logs = newLogView(a)
 	sabClient := sabnzbd.NewClient(cfg.SABnzbd.URL, cfg.SABnzbd.APIKey)
+	a.sab = sabClient
 	a.probes = []probe{
 		{"Radarr", func(ctx context.Context) (string, error) {
 			st, err := radarrClient.SystemStatus(ctx)
@@ -135,6 +142,10 @@ func New(cfg *config.Config) *App {
 		AddItem(a.pages, 0, 1, true).
 		AddItem(a.status, 1, 0, false)
 
+	a.app.SetBeforeDrawFunc(func(s tcell.Screen) bool {
+		a.screen = s
+		return false
+	})
 	a.app.SetRoot(&toastRoot{Flex: layout, app: a}, true).EnableMouse(false)
 	a.app.SetInputCapture(a.handleKey)
 	a.switchTo(0)
@@ -206,6 +217,11 @@ func (a *App) Run() error {
 	stop := make(chan struct{})
 	defer close(stop)
 	go a.watchServices(stop)
+	if a.notifyDone {
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+		go a.watchDownloads(ctx, a.sab, a.bell)
+	}
 	return a.app.Run()
 }