Join one FM-Funknetz talk group from a headset window.

The station reads ~/.funknetz.json, speaks protocol 2.0, and builds an unsigned funknetz.app.

Co-authored-by: Cursor <cursoragent@cursor.com>

app.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"gitea.neitzel.de/konrad/funknetz/audio"
+	"gitea.neitzel.de/konrad/funknetz/station"
+)
+
+// App is the window's view of the station.
+type App struct {
+	cancel  context.CancelFunc
+	station *station.Station
+}
+
+func (a *App) startup(ctx context.Context) {
+	runCtx, cancel := context.WithCancel(ctx)
+	a.cancel = cancel
+	if err := audio.Start(runCtx, a.station.WriteMicrophone, a.station.TakePlayback); err != nil {
+		a.station.Fail("could not open the audio device")
+		return
+	}
+	go func() { _ = a.station.Run(runCtx) }()
+}
+
+func (a *App) shutdown(context.Context) {
+	if a.cancel != nil {
+		a.cancel()
+	}
+}
+
+// State returns the station state the page renders.
+func (a *App) State() station.State { return a.station.State() }
+
+// HoldButton reports that the on-screen button is held.
+func (a *App) HoldButton() { a.station.HoldButton() }
+
+// ReleaseButton reports that the on-screen button was released.
+func (a *App) ReleaseButton() { a.station.ReleaseButton() }
+
+// HoldSpace reports that Space is held.
+func (a *App) HoldSpace() { a.station.HoldSpace() }
+
+// ReleaseSpace reports that Space was released.
+func (a *App) ReleaseSpace() { a.station.ReleaseSpace() }
+
+func configPath() (string, error) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(home, ".funknetz.json"), nil
+}
+
+func openStation() (*station.Station, error) {
+	path, err := configPath()
+	if err != nil {
+		return nil, fmt.Errorf("could not be read")
+	}
+	return station.New(station.Options{ConfigPath: path})
+}