Initialer Commit: Projekt Start
This commit is contained in:
Tim Leikauf
372
lib/screens/cart_screen.dart
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372
lib/screens/cart_screen.dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'package:cached_network_image/cached_network_image.dart';
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import '../providers/cart_provider.dart';
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import '../services/coupon_service.dart';
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import '../models/coupon.dart';
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import 'product_detail_screen.dart';
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import 'checkout_screen.dart';
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class _CartScreenState extends State<CartScreen> {
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final CouponService _couponService = CouponService();
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final TextEditingController _couponController = TextEditingController();
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Coupon? _appliedCoupon;
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bool _isValidatingCoupon = false;
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@override
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void dispose() {
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_couponController.dispose();
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super.dispose();
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}
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Future<void> _applyCoupon() async {
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if (_couponController.text.trim().isEmpty) return;
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setState(() {
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_isValidatingCoupon = true;
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});
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final coupon = await _couponService.validateCoupon(_couponController.text.trim());
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setState(() {
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_appliedCoupon = coupon.isValid ? coupon : null;
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_isValidatingCoupon = false;
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});
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if (!coupon.isValid) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text(coupon.errorMessage ?? 'Ungültiger Gutschein-Code'),
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backgroundColor: Colors.red,
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),
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);
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}
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}
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}
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void _removeCoupon() {
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setState(() {
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_appliedCoupon = null;
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_couponController.clear();
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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('Warenkorb'),
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),
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body: Consumer<CartProvider>(
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builder: (context, cart, child) {
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if (cart.items.isEmpty) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.shopping_cart_outlined,
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size: 64,
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color: Colors.grey[400],
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),
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const SizedBox(height: 16),
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Text(
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'Dein Warenkorb ist leer',
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style: Theme.of(context).textTheme.titleLarge?.copyWith(
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color: Colors.grey[600],
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),
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),
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const SizedBox(height: 8),
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Text(
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'Füge Produkte hinzu, um zu beginnen',
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style: Theme.of(context).textTheme.bodyMedium?.copyWith(
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color: Colors.grey[500],
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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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return Column(
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children: [
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Expanded(
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child: ListView.builder(
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padding: const EdgeInsets.all(16),
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itemCount: cart.items.length,
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itemBuilder: (context, index) {
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final item = cart.items[index];
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return Card(
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margin: const EdgeInsets.only(bottom: 12),
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child: InkWell(
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onTap: () {
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Navigator.push(
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context,
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MaterialPageRoute(
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builder: (context) => ProductDetailScreen(
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product: item.product,
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),
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),
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);
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},
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child: Padding(
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padding: const EdgeInsets.all(12),
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child: Row(
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children: [
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// Produktbild
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if (item.product.imageUrl != null)
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ClipRRect(
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borderRadius: BorderRadius.circular(8),
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child: CachedNetworkImage(
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imageUrl: item.product.imageUrl!,
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width: 80,
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height: 80,
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fit: BoxFit.cover,
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placeholder: (context, url) => Container(
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width: 80,
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height: 80,
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color: Colors.grey[300],
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child: const Center(
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child: CircularProgressIndicator(),
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),
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),
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errorWidget: (context, url, error) =>
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Container(
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width: 80,
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height: 80,
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color: Colors.grey[300],
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child: const Icon(Icons.image_not_supported),
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),
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),
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)
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else
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Container(
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width: 80,
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height: 80,
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color: Colors.grey[300],
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child: const Icon(Icons.image_not_supported),
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),
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const SizedBox(width: 12),
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// Produktinfo
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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item.product.name,
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style: Theme.of(context)
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.textTheme
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.titleMedium
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?.copyWith(
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fontWeight: FontWeight.bold,
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),
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maxLines: 2,
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overflow: TextOverflow.ellipsis,
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),
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const SizedBox(height: 4),
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Text(
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'${item.product.price} €',
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style: Theme.of(context)
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.textTheme
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.bodyLarge
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?.copyWith(
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color: const Color(0xFF8B6F47),
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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),
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// Mengensteuerung
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Column(
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children: [
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Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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IconButton(
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icon: const Icon(Icons.remove_circle_outline),
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onPressed: () => cart.removeItem(item.product),
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),
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Text(
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'${item.quantity}',
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style: Theme.of(context).textTheme.titleMedium,
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),
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IconButton(
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icon: const Icon(Icons.add_circle_outline),
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onPressed: () => cart.addItem(item.product),
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),
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],
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),
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Text(
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'${item.totalPrice.toStringAsFixed(2)} €',
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style: Theme.of(context)
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.textTheme
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.bodyMedium
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?.copyWith(
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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// Entfernen
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IconButton(
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icon: const Icon(Icons.delete_outline),
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color: Colors.red,
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onPressed: () {
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cart.removeItemCompletely(item.product);
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(
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content: Text('${item.product.name} entfernt'),
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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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),
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// Gesamtsumme und Checkout
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Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.1),
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blurRadius: 4,
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offset: const Offset(0, -2),
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),
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],
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),
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child: Column(
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children: [
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// Gutschein-Eingabe
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Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: Colors.grey[100],
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borderRadius: BorderRadius.circular(8),
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),
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child: Row(
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children: [
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Expanded(
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child: TextField(
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controller: _couponController,
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decoration: InputDecoration(
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hintText: 'Gutschein-Code',
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border: InputBorder.none,
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isDense: true,
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),
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enabled: !_isValidatingCoupon && _appliedCoupon == null,
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),
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),
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if (_appliedCoupon != null)
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IconButton(
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icon: const Icon(Icons.check_circle, color: Colors.green),
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onPressed: _removeCoupon,
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)
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else
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IconButton(
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icon: _isValidatingCoupon
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? const SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(strokeWidth: 2),
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)
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: const Icon(Icons.add),
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onPressed: _isValidatingCoupon ? null : _applyCoupon,
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),
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],
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),
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),
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if (_appliedCoupon != null) ...[
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const SizedBox(height: 8),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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'Rabatt (${_appliedCoupon!.code}):',
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style: Theme.of(context).textTheme.bodyMedium,
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),
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Text(
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'-${_couponService.calculateDiscount(_appliedCoupon!, cart.totalPrice).toStringAsFixed(2)} €',
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style: Theme.of(context).textTheme.bodyMedium?.copyWith(
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color: Colors.green,
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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],
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const SizedBox(height: 12),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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'Gesamtsumme:',
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style: Theme.of(context).textTheme.titleLarge?.copyWith(
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fontWeight: FontWeight.bold,
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),
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),
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Text(
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'${(cart.totalPrice - (_appliedCoupon != null ? _couponService.calculateDiscount(_appliedCoupon!, cart.totalPrice) : 0)).toStringAsFixed(2)} €',
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style: Theme.of(context).textTheme.headlineSmall?.copyWith(
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color: const Color(0xFF8B6F47),
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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const SizedBox(height: 16),
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SizedBox(
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width: double.infinity,
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child: ElevatedButton(
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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 CheckoutScreen(),
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),
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);
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},
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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: const Text(
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'Zur Kasse',
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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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),
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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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class CartScreen extends StatefulWidget {
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const CartScreen({super.key});
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@override
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State<CartScreen> createState() => _CartScreenState();
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}
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