stato intermedio

internal/services/auth_service.go

@@ -22,8 +22,20 @@ var (
 	ErrInvalidCredentials    = errors.New("invalid credentials")
 	ErrEmailNotVerified      = errors.New("email not verified")
 	ErrInvalidOrExpiredToken = errors.New("invalid or expired token")
+	ErrInvalidLanguage       = errors.New("invalid language")
+	ErrInvalidTheme          = errors.New("invalid theme")
 )
 
+var supportedLanguages = map[string]struct{}{
+	"it":    {},
+	"en":    {},
+	"en_us": {},
+	"de":    {},
+	"fr":    {},
+	"de_ch": {},
+	"fr_ch": {},
+}
+
 type AuthService struct {
 	cfg            *config.Config
 	users          *repo.UserRepo
@@ -187,6 +199,23 @@ func (s *AuthService) ResetPassword(token, newPassword string) error {
 	return s.resetTokens.DeleteByID(record.ID)
 }
 
+func (s *AuthService) UpdateUserLanguage(userID string, lang string) error {
+	normalized := NormalizeLanguage(lang)
+	if !IsSupportedLanguage(normalized) {
+		return ErrInvalidLanguage
+	}
+
+	return s.users.UpsertLanguagePreference(userID, normalized)
+}
+
+func (s *AuthService) UpdateUserTheme(userID string, theme string) error {
+	normalized := NormalizeTheme(theme)
+	if normalized != "dark" && normalized != "light" {
+		return ErrInvalidTheme
+	}
+	return s.users.UpsertDarkPreference(userID, normalized == "dark")
+}
+
 func (s *AuthService) issueVerifyEmail(ctx context.Context, user *models.User) error {
 	plainToken, err := auth.NewToken()
 	if err != nil {
@@ -245,3 +274,17 @@ func (s *AuthService) sendResetEmail(ctx context.Context, user *models.User, pla
 func normalizeEmail(email string) string {
 	return strings.ToLower(strings.TrimSpace(email))
 }
+
+func NormalizeLanguage(lang string) string {
+	normalized := strings.ToLower(strings.TrimSpace(lang))
+	return strings.ReplaceAll(normalized, "-", "_")
+}
+
+func IsSupportedLanguage(lang string) bool {
+	_, ok := supportedLanguages[NormalizeLanguage(lang)]
+	return ok
+}
+
+func NormalizeTheme(theme string) string {
+	return strings.ToLower(strings.TrimSpace(theme))
+}