check pin login

lib/pages/main/home_page.dart

@@ -408,6 +408,17 @@ class _HomePageState extends State<HomePage> {
 
     final pinLoginBtn = IconButton(
       onPressed: () {
+        if (!mainModel.hasPinLogin()) {
+          showMsgDialog(context, "Error", "Login user doesn't have permission");
+          return;
+        }
+
+        if (!mainModel.allowPin()) {
+          showMsgDialog(
+              context, "Error", "Login user has more than one privilege");
+          return;
+        }
+
         Navigator.pushAndRemoveUntil(
             context,
             CupertinoPageRoute(

lib/pages/main/model/main_model.dart

@@ -82,6 +82,17 @@ class MainModel extends ChangeNotifier {
     return this.user != null && this.user!.hasAdmin();
   }
 
+  bool hasPinLogin() {
+    return user != null && user!.hasPinLogin();
+  }
+
+  bool allowPin() {
+    return user != null &&
+        user!.privileges.isNotEmpty &&
+        user!.privileges.length == 1 &&
+        hasPinLogin();
+  }
+
   // userListener should never be closed
   StreamSubscription<User?>? userListener;
   _init() async {