Tela de login completa

lib/controllers/login_controller.dart

@@ -0,0 +1,74 @@
+import 'package:flutter/material.dart';
+
+class LoginController with ChangeNotifier {
+  final TextEditingController emailController = TextEditingController();
+  final TextEditingController passwordController = TextEditingController();
+  
+  bool _isLoading = false;
+  bool _obscurePassword = true;
+  String? _emailError;
+  String? _passwordError;
+
+  bool get isLoading => _isLoading;
+  bool get obscurePassword => _obscurePassword;
+  String? get emailError => _emailError;
+  String? get passwordError => _passwordError;
+
+  void togglePasswordVisibility() {
+    _obscurePassword = !_obscurePassword;
+    notifyListeners();
+  }
+
+  String? validateEmail(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'Por favor, insira o seu email';
+    }
+    final emailRegex = RegExp(r'^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$');
+    if (!emailRegex.hasMatch(value)) {
+      return 'Por favor, insira um email válido';
+    }
+    return null;
+  }
+
+  String? validatePassword(String? value) {
+    if (value == null || value.isEmpty) {
+      return 'Por favor, insira a sua password';
+    }
+    if (value.length < 6) {
+      return 'A password deve ter pelo menos 6 caracteres';
+    }
+    return null;
+  }
+
+  Future<bool> login() async {
+    _emailError = validateEmail(emailController.text);
+    _passwordError = validatePassword(passwordController.text);
+
+    if (_emailError != null || _passwordError != null) {
+      notifyListeners();
+      return false;
+    }
+
+    _isLoading = true;
+    notifyListeners();
+
+    try {
+      await Future.delayed(const Duration(seconds: 2));
+      
+      // Simula login bem-sucedido
+      _isLoading = false;
+      notifyListeners();
+      return true;
+    } catch (e) {
+      _isLoading = false;
+      _emailError = 'Erro no login. Tente novamente.';
+      notifyListeners();
+      return false;
+    }
+  }
+
+  void dispose() {
+    emailController.dispose();
+    passwordController.dispose();
+  }
+}