add receipt when finishing shopping

mobile/lib/pages/finish_shopping_page.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:mobile/repos/cart.dart';
+import 'package:mobile/repos/receipt.dart';
 import 'package:mobile/widgets/primary_button.dart';
 import 'package:mobile/widgets/receipt_item.dart';
 import 'package:provider/provider.dart';
@@ -10,6 +11,7 @@ class FinishShoppingPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final CartRepo cartRepo = context.read<CartRepo>();
+    final ReceiptRepo receiptRepo = context.read<ReceiptRepo>();
     final cart = cartRepo.allCartItems();
 
     return Scaffold(
@@ -43,8 +45,17 @@ class FinishShoppingPage extends StatelessWidget {
             )),
           ),
           Center(
-              child:
+              child: PrimaryButton(
-                  PrimaryButton(onPressed: () {}, child: const Text("Betal")))
+                  onPressed: () {
+                    receiptRepo.createReceipt(cart);
+                    cartRepo.clearCart();
+                    Navigator.pop(context);
+                  },
+                  child: const Text("Betal"))),
+          //const CircularProgressIndicator(
+          //  valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
+          //  strokeWidth: 6.0,
+          //)
         ],
       ),
     );

mobile/lib/repos/cart.dart

@@ -22,45 +22,10 @@ class CartRepo extends ChangeNotifier {
         amount: 6),
     CartItem(
         product: Product(
-            id: 1,
+            id: 3,
-            name: "Letmælk",
+            name: "Minimælk",
-            price: 13,
+            price: 12,
-            description: "Konventionel letmælk med fedtprocent på 1,5%"),
+            description: "Konventionel minimælk med fedtprocent på 0,4%"),
-        amount: 1),
-    CartItem(
-        product: Product(
-            id: 1,
-            name: "Letmælk",
-            price: 13,
-            description: "Konventionel letmælk med fedtprocent på 1,5%"),
-        amount: 1),
-    CartItem(
-        product: Product(
-            id: 1,
-            name: "Letmælk",
-            price: 13,
-            description: "Konventionel letmælk med fedtprocent på 1,5%"),
-        amount: 1),
-    CartItem(
-        product: Product(
-            id: 1,
-            name: "Letmælk",
-            price: 13,
-            description: "Konventionel letmælk med fedtprocent på 1,5%"),
-        amount: 1),
-    CartItem(
-        product: Product(
-            id: 1,
-            name: "Letmælk",
-            price: 13,
-            description: "Konventionel letmælk med fedtprocent på 1,5%"),
-        amount: 1),
-    CartItem(
-        product: Product(
-            id: 1,
-            name: "Letmælk",
-            price: 13,
-            description: "Konventionel letmælk med fedtprocent på 1,5%"),
         amount: 1),
   ];
 
@@ -115,7 +80,7 @@ class CartRepo extends ChangeNotifier {
     notifyListeners();
   }
 
-  addToCart(Product product) {
+  void addToCart(Product product) {
     final cartItem = withProductId(product.id);
     if (cartItem == null) {
       cart.add(CartItem(product: product, amount: 1));
@@ -125,14 +90,19 @@ class CartRepo extends ChangeNotifier {
     notifyListeners();
   }
 
-  totalItemsInCart() {
+  int totalItemsInCart() {
     return cart.fold<int>(0, (prev, cartItem) => prev + cartItem.amount);
   }
 
-  totalPrice() {
+  int totalPrice() {
     return cart.fold<int>(
         0, (prev, cartItem) => prev + cartItem.amount * cartItem.product.price);
   }
+
+  void clearCart() {
+    cart.clear();
+    notifyListeners();
+  }
 }
 
 class CartItem {

mobile/lib/repos/receipt.dart

@@ -1,7 +1,9 @@
 import 'package:flutter/material.dart';
+import 'package:mobile/repos/cart.dart';
 import 'package:mobile/repos/product.dart';
 
 class ReceiptRepo extends ChangeNotifier {
+  int nextId = 0;
   final List<Receipt> receipts = [
     Receipt(
         id: 0,
@@ -9,30 +11,33 @@ class ReceiptRepo extends ChangeNotifier {
         receiptItems: [
           ReceiptItem(
               product: Product(
-                  id: 1,
+                  id: 1243,
                   name: "Letmælk",
                   price: 13,
                   description: "Konventionel minimælk med fedtprocent på 0,4%"),
               amount: 1),
           ReceiptItem(
               product: Product(
-                  id: 0,
+                  id: 340,
                   name: "Minimælk",
                   price: 12,
                   description: "Konventionel minimælk med fedtprocent på 0,4%"),
               amount: 3),
         ]),
-    Receipt(id: 1, date: DateTime.now(), receiptItems: [
+    Receipt(
+        id: 1,
+        date: DateTime.fromMillisecondsSinceEpoch(1735031200000),
+        receiptItems: [
           ReceiptItem(
               product: Product(
-              id: 1,
+                  id: 12341,
                   name: "Letmælk",
                   price: 13,
                   description: "Konventionel minimælk med fedtprocent på 0,4%"),
               amount: 3),
           ReceiptItem(
               product: Product(
-              id: 0,
+                  id: 1234443,
                   name: "Minimælk",
                   price: 12,
                   description: "Konventionel minimælk med fedtprocent på 0,4%"),
@@ -52,6 +57,18 @@ class ReceiptRepo extends ChangeNotifier {
     }
     return null;
   }
+
+  void createReceipt(List<CartItem> cartItems) {
+    List<ReceiptItem> receiptItems = [];
+    for (var i = 0; i < cartItems.length; i++) {
+      final ReceiptItem receiptItem = ReceiptItem(
+          amount: cartItems[i].amount, product: cartItems[i].product);
+      receiptItems.add(receiptItem);
+    }
+    receipts.add(Receipt(
+        date: DateTime.now(), receiptItems: receiptItems, id: nextId++));
+    notifyListeners();
+  }
 }
 
 class Receipt {