Demo mode: automatically connect as demo user

internal/routes/userlogin.go

@@ -16,21 +16,29 @@ import (
 )
 
 func PostLoginHandler(ac appcontext.AppContext) {
-	var user dto.UserLogin
-	err := ac.C.ShouldBindJSON(&user)
-	if err != nil {
-		myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
-		return
-	}
 
-	if !isUserAndPasswordOk(ac.Db, user.Username, user.Password) {
-		ac.C.JSON(http.StatusUnauthorized,
-			gin.H{"error": i18nresource.GetTranslatedMessage(&ac, "InvalidCredentials")})
-		return
+	var username string
+
+	if !ac.Config.DemoMode {
+		var user dto.UserLogin
+		err := ac.C.ShouldBindJSON(&user)
+		if err != nil {
+			myvalidator.ReturnErrorsAsJsonResponse(&ac, err)
+			return
+		}
+
+		if !ac.Config.DemoMode && !isUserAndPasswordOk(ac.Db, user.Username, user.Password) {
+			ac.C.JSON(http.StatusUnauthorized,
+				gin.H{"error": i18nresource.GetTranslatedMessage(&ac, "InvalidCredentials")})
+			return
+		}
+		username = user.Username
+	} else {
+		username = "demo"
 	}
 
 	var jwtToken string
-	jwtToken, err = jwtauth.GenerateJwtToken(user.Username)
+	jwtToken, err := jwtauth.GenerateJwtToken(username)
 	if err != nil {
 		ac.C.JSON(http.StatusUnauthorized,
 			gin.H{"error": fmt.Errorf("Error when generating JWT token: %w", err)})