Added many Eventbus Structs for the Frontend Handling

goTool/frontend/server.go

@@ -3,6 +3,7 @@ package frontend
 import (
 	"context"
 	"embed"
+	"encoding/json"
 	"io/fs"
 	"log"
 	"net/http"
@@ -33,16 +34,15 @@ func New(bus eventbus.EventBus) *FServer {
 }
 
 func (fsrv *FServer) routes() {
-	// Statische Dateien aus dem Embed-FS
-	// "www" Präfix entfernen, damit index.html unter / verfügbar ist
+	// Static files from the Embed-FS
+	// remove "www" prefix, so index.html is reachable over /
 	root, _ := fs.Sub(staticFiles, "www")
 	fsrv.mux.Handle("/", http.FileServer(http.FS(root)))
 
-	// WebSocket Endpunkt
 	fsrv.mux.HandleFunc("/ws", fsrv.handleWS)
 }
 
-func (fsrv *FServer) handleWS(w http.ResponseWriter, r *http.Request) {
+func (fs *FServer) handleWS(w http.ResponseWriter, r *http.Request) {
 	conn, err := upgrader.Upgrade(w, r, nil)
 	if err != nil {
 		log.Printf("Upgrade error: %v", err)
@@ -50,53 +50,126 @@ func (fsrv *FServer) handleWS(w http.ResponseWriter, r *http.Request) {
 	}
 	defer conn.Close()
 
-	// Kanäle für die Hardware-Events abonnieren
-	rxChan := fsrv.bus.Subscribe(api.TopicUARTRx)
-	txChan := fsrv.bus.Subscribe(api.TopicUARTTx)
-
 	// Context nutzen, um Goroutinen zu stoppen, wenn die Verbindung abreißt
 	ctx, cancel := context.WithCancel(r.Context())
 	defer cancel()
 
 	// WRITER: Send Events to Browser
-	go func() {
-		for {
-			select {
-			case <-ctx.Done():
-				return
-			case f := <-rxChan:
-				if err := conn.WriteJSON(map[string]any{"type": "rx", "frame": f}); err != nil {
-					return
-				}
-			case f := <-txChan:
-				if err := conn.WriteJSON(map[string]any{"type": "tx", "frame": f}); err != nil {
-					return
-				}
-			}
-		}
-	}()
+	go fs.HandleAppEvents(ctx, conn)
 
 	// READER: Commands from Browser
-	for {
-		var cmd api.WsMessage
-		if err := conn.ReadJSON(&cmd); err != nil {
-			log.Printf("WS Read Error: %v", err)
-			break
-		}
-
-		fsrv.bus.Publish(api.TopicFrontendCmd, cmd)
-		log.Printf("Browser Action: %s auf with %v", cmd.Cmd, cmd.Payload)
-	}
+	// This Function is Blocking
+	fs.GetFrontendEvents(ctx, conn)
 }
 
-func (fsrv *FServer) Start(addr string) error {
+func (fs *FServer) Start(addr string) error {
 	server := &http.Server{
 		Addr:         addr,
-		Handler:      fsrv.mux,
+		Handler:      fs.mux,
 		ReadTimeout:  5 * time.Second,
 		WriteTimeout: 10 * time.Second,
 	}
 
+	ctx, cancle := context.WithCancel(context.Background())
+	defer cancle()
+
+	go fs.HandleFrontendEvents(ctx)
+
 	log.Printf("Frontend Server gestartet auf %s", addr)
 	return server.ListenAndServe()
 }
+
+func (fs *FServer) HandleAppEvents(ctx context.Context, conn *websocket.Conn) error {
+	// Kanäle für die Hardware-Events abonnieren
+	rxChan := fs.bus.Subscribe(api.TopicUARTRx)
+	txChan := fs.bus.Subscribe(api.TopicUARTTx)
+	UartActions := fs.bus.Subscribe(api.TopicUartAction)
+
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		case f := <-rxChan:
+			if err := conn.WriteJSON(map[string]any{"type": "rx", "frame": f}); err != nil {
+				return nil
+			}
+		case f := <-txChan:
+			if err := conn.WriteJSON(map[string]any{"type": "tx", "frame": f}); err != nil {
+				return nil
+			}
+		case msgT := <-UartActions:
+			switch msg := msgT.(type) {
+			case api.ActionUartConnected:
+				// TODO: nicht hier die daten nachhaltig speichern damit sie ans frontend gesendet werden können
+				// TODO: das muss irgendwo central passieren nicht für jeden client
+				if msg.Error != nil {
+				}
+				continue
+			case api.ActionUartDisconnected:
+				continue
+			}
+		}
+	}
+}
+
+func (fs *FServer) GetFrontendEvents(ctx context.Context, conn *websocket.Conn) error {
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		default:
+			var cmd api.WsMessage
+			if err := conn.ReadJSON(&cmd); err != nil {
+				log.Printf("WS Read Error: %v", err)
+				return err
+			}
+
+			val, ok := api.MessageReceiveRegistry[cmd.Cmd]
+			if !ok {
+				log.Printf("No Message Type mapped to %v", cmd.Cmd)
+				continue
+			}
+			valM := val()
+
+			err := json.Unmarshal(cmd.Payload, valM)
+			if err != nil {
+				log.Printf("Could not Unmarshal payload %v", cmd.Payload)
+			}
+
+			fs.bus.Publish(api.TopicFrontendCmd, valM)
+			log.Printf("Browser Action: %s auf with %v", cmd.Cmd, cmd.Payload)
+		}
+	}
+}
+
+func (fs *FServer) HandleFrontendEvents(ctx context.Context) error {
+	fChan := fs.bus.Subscribe(api.TopicFrontendCmd)
+
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		case msg := <-fChan:
+			switch msgT := msg.(type) {
+			case api.WsUartSendMessage:
+				log.Printf("Sending Uart Data % X", msgT.Data)
+				fs.bus.Publish(api.TopicUartAction, api.ActionUartSendMessage{
+					MsgId: msgT.MsgId,
+					Data:  msgT.Data,
+				})
+				continue
+			case api.WsUartConnect:
+				log.Printf("Connect with %s : %d", msgT.SelectedAdapter, msgT.Baudrate)
+				fs.bus.Publish(api.TopicUartAction, api.ActionUartConnect{
+					Adapter:  msgT.SelectedAdapter,
+					Baudrate: msgT.Baudrate,
+				})
+				continue
+			case api.WsUartDisconnect:
+				log.Printf("Disconnect from Uart Adapter")
+				fs.bus.Publish(api.TopicUartAction, api.ActionUartDisconnect{})
+				continue
+			}
+		}
+	}
+}