feat(mobile): keep screen up and use persistent instance id

cmd/mobile/main.go

@@ -6,6 +6,7 @@ package main
 import (
 	"context"
 	"os"
+	"sync"
 
 	"forge.cadoles.com/arcad/arcast/pkg/browser/gioui"
 	"forge.cadoles.com/arcad/arcast/pkg/server"
@@ -14,18 +15,15 @@ import (
 	"gioui.org/layout"
 	"gioui.org/op"
 	"github.com/gioui-plugins/gio-plugins/plugin"
+	"github.com/gioui-plugins/gio-plugins/safedata"
+	"github.com/gioui-plugins/gio-plugins/safedata/giosafedata"
 	"github.com/gioui-plugins/gio-plugins/webviewer/webview"
 	"github.com/pkg/errors"
 	"gitlab.com/wpetit/goweb/logger"
-
-	// Android permissions
-	_ "net"
-
-	_ "gioui.org/app/permission/networkstate"
-	_ "gioui.org/app/permission/storage"
-	_ "gioui.org/app/permission/wakelock"
 )
 
+const instanceIDSecretIdentifier = "instance_id"
+
 func main() {
 	ctx := context.Background()
 
@@ -36,6 +34,12 @@ func main() {
 
 	browser := gioui.NewBrowser(window)
 
+	var safeDataConfig safedata.Config
+	var safeDataConfigWaigGroup sync.WaitGroup
+	var initSafeDataConfig sync.Once
+
+	safeDataConfigWaigGroup.Add(1)
+
 	go func() {
 		ops := new(op.Ops)
 		for {
@@ -50,16 +54,30 @@ func main() {
 				gtx := layout.NewContext(ops, evt)
 				browser.Layout(gtx)
 				evt.Frame(gtx.Ops)
+			case app.ViewEvent:
+				initSafeDataConfig.Do(func() {
+					defer safeDataConfigWaigGroup.Done()
+					safeDataConfig = giosafedata.NewConfigFromViewEvent(window, evt, "com.cadoles.arcast_player")
+				})
 			}
 		}
 	}()
 
 	go func() {
+
 		for {
 			ctx, cancel := context.WithCancel(ctx)
 			defer cancel()
 
-			server := server.New(browser)
+			safeDataConfigWaigGroup.Wait()
+			safe := safedata.NewSafeData(safeDataConfig)
+
+			instanceID, err := getInstanceIDFromSafeData(safe)
+			if err != nil {
+				logger.Fatal(ctx, "could not retrieve instance id", logger.CapturedE(errors.WithStack(err)))
+			}
+
+			server := server.New(browser, server.WithInstanceID(instanceID))
 
 			if err := server.Start(); err != nil {
 				logger.Fatal(ctx, "could not start server", logger.CapturedE(errors.WithStack(err)))
@@ -79,3 +97,27 @@ func main() {
 
 	app.Main()
 }
+
+func getInstanceIDFromSafeData(safe *safedata.SafeData) (string, error) {
+	instanceIDSecret, err := safe.Get(instanceIDSecretIdentifier)
+	if err != nil && err.Error() != "not found" {
+		return "", errors.Wrapf(err, "could not retrieve instance id secret")
+	}
+
+	var instanceID string
+	if len(instanceIDSecret.Data) > 0 {
+		instanceID = string(instanceIDSecret.Data)
+	} else {
+		instanceID = server.NewRandomInstanceID()
+
+		instanceIDSecret.Identifier = instanceIDSecretIdentifier
+		instanceIDSecret.Data = []byte(instanceID)
+		instanceIDSecret.Description = "Arcast player instance identifier"
+
+		if err := safe.Set(instanceIDSecret); err != nil {
+			return "", errors.Wrapf(err, "could not save instance id secret")
+		}
+	}
+
+	return instanceID, nil
+}