endpoint to update JWT cookies

app/service/authService/auth.go

@@ -28,6 +28,7 @@ type JWTClaims struct {
 	Username  string             `json:"username"`
 	Role      model.CustomerRole `json:"customer_role"`
 	CartsIDs  []uint             `json:"carts_ids"`
+	LangID    uint               `json:"lang_id"`
 	CountryID uint               `json:"country_id"`
 	jwt.RegisteredClaims
 }
@@ -149,7 +150,8 @@ func (s *AuthService) Register(req *model.RegisterRequest) error {
 		EmailVerified:            false,
 		EmailVerificationToken:   token,
 		EmailVerificationExpires: &expiresAt,
-		Lang:                     req.Lang,
+		LangID:                   req.LangID,
+		CountryID:                req.CountryID,
 	}
 
 	if err := s.db.Create(&user).Error; err != nil {
@@ -158,10 +160,11 @@ func (s *AuthService) Register(req *model.RegisterRequest) error {
 
 	// Send verification email
 	baseURL := config.Get().App.BaseURL
-	lang := req.Lang
-	if lang == "" {
-		lang = "en" // Default to English
+	lang, err := s.GetLangISOCode(req.LangID)
+	if err != nil {
+		return responseErrors.ErrBadLangID
 	}
+
 	if err := s.email.SendVerificationEmail(user.Email, user.EmailVerificationToken, baseURL, lang); err != nil {
 		// Log error but don't fail registration - user can request resend
 		_ = err
@@ -266,10 +269,11 @@ func (s *AuthService) RequestPasswordReset(emailAddr string) error {
 
 	// Send password reset email
 	baseURL := config.Get().App.BaseURL
-	lang := "en"
-	if user.Lang != "" {
-		lang = user.Lang
+	lang, err := s.GetLangISOCode(user.LangID)
+	if err != nil {
+		return responseErrors.ErrBadLangID
 	}
+
 	if err := s.email.SendPasswordResetEmail(user.Email, user.PasswordResetToken, baseURL, lang); err != nil {
 		_ = err
 	}
@@ -477,7 +481,8 @@ func (s *AuthService) generateAccessToken(user *model.Customer) (string, error)
 		Username:  user.Email,
 		Role:      user.Role,
 		CartsIDs:  []uint{},
-		CountryID: 1,
+		LangID:    user.LangID,
+		CountryID: user.CountryID,
 		RegisteredClaims: jwt.RegisteredClaims{
 			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(s.config.JWTExpiration) * time.Second)),
 			IssuedAt:  jwt.NewNumericDate(time.Now()),
@@ -488,6 +493,45 @@ func (s *AuthService) generateAccessToken(user *model.Customer) (string, error)
 	return token.SignedString([]byte(s.config.JWTSecret))
 }
 
+// UpdateChoice updates the user's language and/or country choice and returns a new JWT token
+func (s *AuthService) UpdateChoice(userID uint, langID uint, countryID uint) (string, error) {
+	var user model.Customer
+
+	// Find user by ID
+	if err := s.db.First(&user, userID).Error; err != nil {
+		return "", err
+	}
+
+	// Update user langID if provided
+	if langID == 0 {
+		langID = user.LangID
+	}
+	_, err := s.GetLangISOCode(langID)
+	if err != nil {
+		return "", responseErrors.ErrBadLangID
+	} else {
+		user.LangID = langID
+	}
+
+	if countryID == 0 {
+		countryID = user.CountryID
+	}
+	err = s.CheckIfCountryExists(countryID)
+	if err != nil {
+		return "", responseErrors.ErrBadCountryID
+	} else {
+		user.CountryID = countryID
+	}
+
+	// Save the updated user
+	if err := s.db.Save(&user).Error; err != nil {
+		return "", err
+	}
+
+	// Generate new JWT token with updated claims
+	return s.generateAccessToken(&user)
+}
+
 // generateVerificationToken generates a random verification token
 func (s *AuthService) generateVerificationToken() (string, error) {
 	bytes := make([]byte, 32)
@@ -507,3 +551,29 @@ func validatePassword(password string) error {
 
 	return nil
 }
+
+func (s *AuthService) GetLangISOCode(langID uint) (string, error) {
+	var lang string
+
+	if langID == 0 { // retrieve the default lang
+		err := db.DB.Table("b2b_language").Where("is_default = ?", 1).First(lang).Error
+		return lang, err
+	} else {
+		err := db.DB.Table("b2b_language").Where("id = ?", langID).Where("active = ?", 1).First(lang).Error
+		return lang, err
+	}
+}
+
+func (s *AuthService) CheckIfCountryExists(countryID uint) error {
+	var count int64
+
+	err := db.DB.Table("b2b_countries").Where("id = ?", countryID).Count(&count).Error
+
+	if err != nil {
+		return err
+	}
+	if count == 0 {
+		return responseErrors.ErrBadCountryID
+	}
+	return nil
+}

app/service/authService/google_oauth.go

@@ -153,7 +153,7 @@ func (s *AuthService) findOrCreateGoogleUser(info *view.GoogleUserInfo) (*model.
 		Role:          model.RoleUser,
 		IsActive:      true,
 		EmailVerified: true,
-		Lang:          "en",
+		LangID:        2,
 	}
 
 	if err := s.db.Create(&newUser).Error; err != nil {