OrderModel add total

00-backend/src/main/java/de/htwsaar/webshop/model/OrderModel.java

@@ -29,4 +29,6 @@ public class OrderModel {
 
     @NotNull
     private List<OrderItemModel> orderItems;
+
+    private Integer total;
 }

00-backend/src/main/java/de/htwsaar/webshop/repository/entities/Order.java

@@ -35,6 +35,13 @@ public class Order {
     private List<OrderItem> orderItems;
 
     public OrderModel toModel() {
-        return new OrderModel(id, customer.getId(), time, status, orderItems.stream().map(OrderItem::toModel).toList());
+        return new OrderModel(
+                id,
+                customer.getId(),
+                time,
+                status,
+                orderItems.stream().map(OrderItem::toModel).toList(),
+                orderItems.stream().mapToInt(OrderItem::getPrice).sum()
+        );
     }
 }

00-backend/src/main/java/de/htwsaar/webshop/repository/entities/OrderItem.java

@@ -36,4 +36,8 @@ public class OrderItem {
     public OrderItemModel toModel() {
         return new OrderItemModel(id, amount, article.getUuid());
     }
+
+    public Integer getPrice() {
+        return amount * article.getPrice100();
+    }
 }