Add cart item model

lib/models/cart_item.dart

@@ -0,0 +1,14 @@
+import 'package:flutter/foundation.dart';
+import 'package:thesis_shop/models/product.dart';
+
+@immutable
+class CartItem {
+  final Product product;
+  final int amount;
+
+  double get totalPrice => product.price * amount;
+  String get totalPriceAsString => totalPrice.toStringAsFixed(2);
+
+  const CartItem({required this.product, required this.amount})
+      : assert(amount >= 0);
+}

lib/screens/cart/cart_item_list.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:thesis_shop/models/cart_item.dart';
 
 class CartItemList extends StatelessWidget {
-  const CartItemList({Key? key}) : super(key: key);
+  final List<CartItem> items;
+  const CartItemList({Key? key, required this.items}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -10,17 +12,20 @@ class CartItemList extends StatelessWidget {
       child: Padding(
         padding: const EdgeInsets.all(16.0),
         child: Table(
-          columnWidths: const {
-            0: FlexColumnWidth(),
-            1: FixedColumnWidth(128),
-            2: IntrinsicColumnWidth(),
-          },
-          children: const [
-            TableRow(children: [Text('Äpfel'), Text('3x3€'), Text('9€')]),
-            TableRow(children: [Text('Äpfel'), Text('3x3€'), Text('9€')]),
-            TableRow(children: [Text('Äpfel'), Text('3x3€'), Text('9€')])
-          ],
-        ),
+            columnWidths: const {
+              0: FlexColumnWidth(),
+              1: FixedColumnWidth(128),
+              2: IntrinsicColumnWidth(),
+            },
+            children: items
+                .map(
+                  (item) => TableRow(children: [
+                    Text(item.product.title),
+                    Text("${item.amount}*${item.product.priceAsString}€"),
+                    Text('${item.totalPriceAsString}€'),
+                  ]),
+                )
+                .toList()),
       ),
     );
   }

lib/screens/cart/cart_screen.dart

@@ -1,9 +1,17 @@
 import 'package:flutter/material.dart';
+import 'package:thesis_shop/models/cart_item.dart';
+import 'package:thesis_shop/models/product.dart';
 import 'package:thesis_shop/screens/cart/total_price_text.dart';
 import 'package:thesis_shop/widgets/user_switch.dart';
 
 import 'cart_item_list.dart';
 
+const _placeHolderItems = [
+  CartItem(product: Product(title: 'Äpfel', price: 3), amount: 3),
+  CartItem(product: Product(title: 'Äpfel', price: 3), amount: 3),
+  CartItem(product: Product(title: 'Äpfel', price: 3), amount: 3),
+];
+
 class CartScreen extends StatelessWidget {
   const CartScreen({Key? key}) : super(key: key);
 
@@ -17,7 +25,7 @@ class CartScreen extends StatelessWidget {
       body: Column(
         mainAxisSize: MainAxisSize.max,
         children: const [
-          Expanded(child: CartItemList()),
+          Expanded(child: CartItemList(items: _placeHolderItems)),
           TotalPriceText(),
         ],
       ),