changed logoRepository to authRepository

lib/view_models/auth_view_model.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/material.dart';
-
 import '../core/utils/result.dart';
 import '../data/models/user_model.dart';
 import '../data/repositories/auth_repository.dart';
@@ -8,8 +7,25 @@ class AuthViewModel with ChangeNotifier {
   final AuthRepository _authRepository;
 
   AuthViewModel({required AuthRepository authRepository})
-    : _authRepository = authRepository;
+      : _authRepository = authRepository {
+    usernameController.addListener(_onTextChanged);
+    passwordController.addListener(_onTextChanged);
+    usernameFocus.addListener(_onTextChanged);
+    passwordFocus.addListener(_onTextChanged);
+  }
 
+  final TextEditingController usernameController = TextEditingController();
+  final TextEditingController passwordController = TextEditingController();
+  final FocusNode usernameFocus = FocusNode();
+  final FocusNode passwordFocus = FocusNode();
+
+  bool _obscurePassword = true;
+  bool get obscurePassword => _obscurePassword;
+  bool get isLoginEnabled =>
+      usernameController.text.isNotEmpty &&
+      passwordController.text.isNotEmpty;
+
+  // Auth state
   bool _isLoading = false;
   String? _errorMessage;
   UserModel? _loggedInUser;
@@ -18,25 +34,44 @@ class AuthViewModel with ChangeNotifier {
   String? get errorMessage => _errorMessage;
   UserModel? get loggedInUser => _loggedInUser;
 
-  Future<void> login(String email, String password) async {
+  void togglePasswordVisibility() {
+    _obscurePassword = !_obscurePassword;
+    notifyListeners();
+  }
+
+  void _onTextChanged() {
+    notifyListeners();
+  }
+
+  Future<void> login() async {
     _isLoading = true;
     _errorMessage = null;
     notifyListeners();
 
-    final result = await _authRepository.login(email, password);
+    final result = await _authRepository.login(
+      usernameController.text.trim(),
+      passwordController.text.trim(),
+    );
 
     switch (result) {
       case Ok<UserModel>():
         _loggedInUser = result.value;
-        // موفقیت‌آمیز
         break;
       case Error<UserModel>():
         _errorMessage = result.error.toString();
-        // خطا
         break;
     }
 
     _isLoading = false;
     notifyListeners();
   }
+
+  @override
+  void dispose() {
+    usernameController.dispose();
+    passwordController.dispose();
+    usernameFocus.dispose();
+    passwordFocus.dispose();
+    super.dispose();
+  }
 }