Initialer Commit: Projekt Start
This commit is contained in:
Tim Leikauf
253
lib/screens/login_screen.dart
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253
lib/screens/login_screen.dart
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@@ -0,0 +1,253 @@
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../providers/user_provider.dart';
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import 'register_screen.dart';
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import 'password_reset_screen.dart';
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class LoginScreen extends StatefulWidget {
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const LoginScreen({super.key});
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@override
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State<LoginScreen> createState() => _LoginScreenState();
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}
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class _LoginScreenState extends State<LoginScreen> {
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final _formKey = GlobalKey<FormState>();
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final _usernameController = TextEditingController();
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final _passwordController = TextEditingController();
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bool _obscurePassword = true;
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String? _errorMessage;
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@override
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void dispose() {
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_usernameController.dispose();
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_passwordController.dispose();
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super.dispose();
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}
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Future<void> _handleLogin() async {
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if (!_formKey.currentState!.validate()) {
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return;
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}
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setState(() {
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_errorMessage = null;
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});
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final userProvider = Provider.of<UserProvider>(context, listen: false);
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final success = await userProvider.login(
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_usernameController.text.trim(),
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_passwordController.text,
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);
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if (success) {
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if (mounted) {
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Navigator.of(context).pop(); // Zurück zur vorherigen Seite
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('Erfolgreich eingeloggt!'),
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backgroundColor: Colors.green,
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),
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);
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}
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} else {
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setState(() {
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_errorMessage = 'Ungültige Anmeldedaten. Bitte versuche es erneut.';
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});
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('Anmelden'),
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),
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body: SafeArea(
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child: SingleChildScrollView(
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padding: const EdgeInsets.all(24),
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child: Form(
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key: _formKey,
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.stretch,
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children: [
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const SizedBox(height: 32),
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// Logo oder Titel
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Icon(
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Icons.account_circle,
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size: 80,
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color: Theme.of(context).primaryColor,
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),
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const SizedBox(height: 16),
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Text(
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'Willkommen zurück',
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style: Theme.of(context).textTheme.headlineSmall?.copyWith(
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fontWeight: FontWeight.bold,
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 8),
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Text(
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'Melde dich an, um deine Bestellungen zu sehen',
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style: Theme.of(context).textTheme.bodyMedium?.copyWith(
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color: Colors.grey[600],
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),
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 48),
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// Fehlermeldung
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if (_errorMessage != null)
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Container(
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padding: const EdgeInsets.all(12),
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margin: const EdgeInsets.only(bottom: 16),
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decoration: BoxDecoration(
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color: Colors.red[50],
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borderRadius: BorderRadius.circular(8),
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border: Border.all(color: Colors.red[300]!),
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),
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child: Row(
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children: [
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Icon(Icons.error_outline, color: Colors.red[700]),
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const SizedBox(width: 8),
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Expanded(
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child: Text(
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_errorMessage!,
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style: TextStyle(color: Colors.red[700]),
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),
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),
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],
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),
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),
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// Benutzername/E-Mail Feld
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TextFormField(
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controller: _usernameController,
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decoration: InputDecoration(
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labelText: 'Benutzername oder E-Mail',
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prefixIcon: const Icon(Icons.person),
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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keyboardType: TextInputType.emailAddress,
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textInputAction: TextInputAction.next,
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Bitte gib deinen Benutzernamen oder E-Mail ein';
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}
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return null;
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},
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),
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const SizedBox(height: 16),
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// Passwort Feld
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TextFormField(
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controller: _passwordController,
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decoration: InputDecoration(
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labelText: 'Passwort',
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prefixIcon: const Icon(Icons.lock),
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suffixIcon: IconButton(
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icon: Icon(
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_obscurePassword ? Icons.visibility : Icons.visibility_off,
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),
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onPressed: () {
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setState(() {
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_obscurePassword = !_obscurePassword;
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});
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},
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),
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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obscureText: _obscurePassword,
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textInputAction: TextInputAction.done,
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onFieldSubmitted: (_) => _handleLogin(),
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validator: (value) {
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if (value == null || value.isEmpty) {
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return 'Bitte gib dein Passwort ein';
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}
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return null;
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},
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),
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const SizedBox(height: 24),
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// Anmelden Button
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Consumer<UserProvider>(
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builder: (context, userProvider, child) {
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return ElevatedButton(
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onPressed: userProvider.isLoading ? null : _handleLogin,
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style: ElevatedButton.styleFrom(
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backgroundColor: const Color(0xFF8B6F47),
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(vertical: 16),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(8),
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),
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),
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child: userProvider.isLoading
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? const SizedBox(
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height: 20,
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width: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
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),
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)
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: const Text(
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'Anmelden',
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style: TextStyle(fontSize: 16),
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),
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);
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},
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),
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const SizedBox(height: 8),
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// Passwort vergessen Link
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Align(
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alignment: Alignment.centerRight,
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child: TextButton(
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onPressed: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => const PasswordResetScreen(),
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),
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);
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},
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child: const Text('Passwort vergessen?'),
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),
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),
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const SizedBox(height: 16),
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// Registrieren Link
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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const Text('Noch kein Konto? '),
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TextButton(
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onPressed: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => const RegisterScreen(),
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),
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);
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},
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child: const Text('Jetzt registrieren'),
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),
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],
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),
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],
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),
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),
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),
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),
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);
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}
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}
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