websocket initialization done in App

internal/network/setup.go

@@ -1,51 +0,0 @@
-package network
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"os"
-
-	"nhooyr.io/websocket"
-)
-
-type AuthMessage struct {
-	MsgType     string `json:"type"`
-	AccessToken string `json:"access_token"`
-}
-
-func SendAuthMessage(conn websocket.Conn, ctx context.Context) error {
-	token := os.Getenv("AUTH_TOKEN")
-	msgJson, err := json.Marshal(AuthMessage{MsgType: "auth", AccessToken: token})
-	if err != nil {
-		return err
-	}
-	err = conn.Write(ctx, websocket.MessageText, msgJson)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-func WriteMessage[T any](msg T, conn websocket.Conn, ctx context.Context) error {
-	msgJson, err := json.Marshal(msg)
-	fmt.Println(string(msgJson))
-	if err != nil {
-		return err
-	}
-
-	err = conn.Write(ctx, websocket.MessageText, msgJson)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func ReadMessage(conn websocket.Conn, ctx context.Context) (string, error) {
-	_, msg, err := conn.Read(ctx)
-	if err != nil {
-		return "", err
-	}
-	return string(msg), nil
-}

internal/services/light.go

@@ -3,12 +3,12 @@ package services
 import (
 	"context"
 
-	"github.com/saml-dev/gome-assistant/internal/network"
+	"github.com/saml-dev/gome-assistant/internal/setup"
 	"nhooyr.io/websocket"
 )
 
 type Light struct {
-	conn websocket.Conn
+	conn *websocket.Conn
 	ctx  context.Context
 }
 
@@ -41,10 +41,10 @@ func LightOffRequest(entityId string) LightRequest {
 
 func (l Light) TurnOn(entityId string) {
 	req := LightOnRequest(entityId)
-	network.WriteMessage(req, l.conn, l.ctx)
+	setup.WriteMessage(req, l.conn, l.ctx)
 }
 
 func (l Light) TurnOff(entityId string) {
 	req := LightOffRequest(entityId)
-	network.WriteMessage(req, l.conn, l.ctx)
+	setup.WriteMessage(req, l.conn, l.ctx)
 }

internal/setup/setup.go

@@ -0,0 +1,106 @@
+package setup
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"time"
+
+	"nhooyr.io/websocket"
+)
+
+type AuthMessage struct {
+	MsgType     string `json:"type"`
+	AccessToken string `json:"access_token"`
+}
+
+func WriteMessage[T any](msg T, conn *websocket.Conn, ctx context.Context) error {
+	msgJson, err := json.Marshal(msg)
+	fmt.Println(string(msgJson))
+	if err != nil {
+		return err
+	}
+
+	err = conn.Write(ctx, websocket.MessageText, msgJson)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func ReadMessage(conn *websocket.Conn, ctx context.Context) (string, error) {
+	_, msg, err := conn.Read(ctx)
+	if err != nil {
+		return "", err
+	}
+	return string(msg), nil
+}
+
+func SetupConnection(connString string) (*websocket.Conn, context.Context, context.CancelFunc, error) {
+	ctx, ctxCancel := context.WithTimeout(context.Background(), time.Second*5)
+
+	// Init websocket connection
+	conn, _, err := websocket.Dial(ctx, fmt.Sprintf("ws://%s/api/websocket", connString), nil)
+	if err != nil {
+		fmt.Printf("ERROR: Failed to connect to websocket at ws://%s/api/websocket. Check IP address and port\n", connString)
+		ctxCancel()
+		return nil, nil, nil, err
+	}
+
+	// Read auth_required message
+	_, err = ReadMessage(conn, ctx)
+	if err != nil {
+		ctxCancel()
+		return nil, nil, nil, err
+	}
+
+	// Send auth message
+	err = SendAuthMessage(conn, ctx)
+	if err != nil {
+		ctxCancel()
+		return nil, nil, nil, err
+	}
+
+	// Verify auth message
+	err = VerifyAuthResponse(conn, ctx)
+	if err != nil {
+		fmt.Println("ERROR: Auth token is invalid. Please double check it or create a new token in your Home Assistant profile")
+		ctxCancel()
+		return nil, nil, nil, err
+	}
+
+	return conn, ctx, ctxCancel, err
+}
+
+func SendAuthMessage(conn *websocket.Conn, ctx context.Context) error {
+	token := os.Getenv("AUTH_TOKEN")
+	err := WriteMessage(AuthMessage{MsgType: "auth", AccessToken: token}, conn, ctx)
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+type authResponse struct {
+	MsgType string `json:"type"`
+	Message string `json:"message"`
+}
+
+func VerifyAuthResponse(conn *websocket.Conn, ctx context.Context) error {
+	_, msg, err := conn.Read(ctx)
+	if err != nil {
+		return err
+	}
+
+	var authResp authResponse
+	json.Unmarshal(msg, &authResp)
+	fmt.Println(authResp)
+	if authResp.MsgType != "auth_ok" {
+		return errors.New("invalid auth token")
+	}
+
+	return nil
+}