tm_app/lib/view_models/auth_view_model.dart

import 'package:flutter/material.dart';

import '../core/utils/result.dart';
import '../data/models/user_model.dart';
import '../data/repositories/auth_repository.dart';

class AuthViewModel with ChangeNotifier {
  final AuthRepository _authRepository;

  AuthViewModel(this._authRepository);

  bool _isLoading = false;
  String? _errorMessage;
  UserModel? _loggedInUser;

  bool get isLoading => _isLoading;
  String? get errorMessage => _errorMessage;
  UserModel? get loggedInUser => _loggedInUser;

  Future<void> login(String email, String password) async {
    _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    final result = await _authRepository.login(email, password);

    switch (result) {
      case Ok<UserModel>():
        _loggedInUser = result.value;
        // موفقیت‌آمیز
        break;
      case Error<UserModel>():
        _errorMessage = result.error.toString();
        // خطا
        break;
    }

    _isLoading = false;
    notifyListeners();
  }
}