Cart Updates (#26)

* ardalis/cart-updates

Updating how items are added to cart and displayed in cart.

* Cleaning up UI

src/Web/ViewModels/BasketItemViewModel.cs

@@ -0,0 +1,19 @@
+using Microsoft.eShopWeb.ApplicationCore.Entities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Microsoft.eShopWeb.ViewModels
+{
+
+    public class BasketItemViewModel
+    {
+        public string Id { get; set; }
+        public string ProductId { get; set; }
+        public string ProductName { get; set; }
+        public decimal UnitPrice { get; set; }
+        public decimal OldUnitPrice { get; set; }
+        public int Quantity { get; set; }
+        public string PictureUrl { get; set; }
+    }
+}

src/Web/ViewModels/BasketViewModel.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Microsoft.eShopWeb.ViewModels
+{
+
+    public class BasketViewModel
+    {
+        public List<BasketItemViewModel> Items { get; set; } = new List<BasketItemViewModel>();
+        public string BuyerId { get; set; }
+
+        public decimal Total()
+        {
+            return Math.Round(Items.Sum(x => x.UnitPrice * x.Quantity), 2);
+        }
+    }
+}