adding the start to a coupon service, pushing to test

src/Web/WebMVC/Controllers/OrderController.cs

@@ -13,6 +13,7 @@ namespace Microsoft.eShopOnContainers.WebMVC.Controllers
     {
         private IOrderingService _orderSvc;
         private IBasketService _basketSvc;
+        private ICouponService _couponSvc;
         private readonly IIdentityParser<ApplicationUser> _appUserParser;
         public OrderController(IOrderingService orderSvc, IBasketService basketSvc, IIdentityParser<ApplicationUser> appUserParser)
         {
@@ -41,7 +42,6 @@ namespace Microsoft.eShopOnContainers.WebMVC.Controllers
                 {
                     var user = _appUserParser.Parse(HttpContext.User);
                     var basket = _orderSvc.MapOrderToBasket(model);
-
                     await _basketSvc.Checkout(basket);
 
                     //Redirect to historic list.

src/Web/WebMVC/Services/BasketService.cs

@@ -18,12 +18,14 @@ namespace Microsoft.eShopOnContainers.WebMVC.Services
         private readonly ILogger<BasketService> _logger;
         private readonly string _basketByPassUrl;
         private readonly string _purchaseUrl;
+        private ICouponService _couponSvc;
 
-        public BasketService(HttpClient httpClient, IOptions<AppSettings> settings, ILogger<BasketService> logger)
+        public BasketService(HttpClient httpClient, IOptions<AppSettings> settings, ILogger<BasketService> logger, ICouponService couponService)
         {
             _apiClient = httpClient;
             _settings = settings;
             _logger = logger;
+            _couponSvc = couponService;
 
             _basketByPassUrl = $"{_settings.Value.PurchaseUrl}/b/api/v1/basket";
             _purchaseUrl = $"{_settings.Value.PurchaseUrl}/api/v1";
@@ -53,6 +55,33 @@ namespace Microsoft.eShopOnContainers.WebMVC.Services
 
             return basket;
         }
+        public async Task<Basket> ApplyCoupon(Basket basket)
+        {
+            var uri = API.Basket.UpdateBasket(_basketByPassUrl);
+
+            var basketUpdate = new 
+            {
+                BuyerId = basket.BuyerId,
+                Items = basket.Items.Select(item => new
+                {
+                    Id = item.Id,
+                    ProductId = item.ProductId,
+                    ProductName = item.ProductName,
+                    UnitPrice = item.UnitPrice * (decimal)0.10,
+                    OldUnitPrice = item.UnitPrice,
+                    Quantity = item.Quantity,
+                    PictureUrl = item.PictureUrl
+                }).ToArray()
+            };
+
+            var basketContent = new StringContent(JsonConvert.SerializeObject(basketUpdate), System.Text.Encoding.UTF8, "application/json");
+
+            var response = await _apiClient.PostAsync(uri, basketContent);
+
+            response.EnsureSuccessStatusCode();
+
+            return basket;
+        }
 
         public async Task Checkout(BasketDTO basket)
         {

src/Web/WebMVC/Services/CouponService.cs

@@ -0,0 +1,36 @@
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.eShopOnContainers.WebMVC.ViewModels;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading.Tasks;
+using WebMVC.Infrastructure;
+using WebMVC.Services.ModelDTOs;
+
+namespace Microsoft.eShopOnContainers.WebMVC.Services
+{
+    public class CouponService : ICouponService
+    {
+        public Basket Apply(Basket basket)
+        {
+            //Basket updatedBasket = new Basket();
+            //updatedBasket.BuyerId = basket.BuyerId;
+            //// Todo: Stub for now, should reach out to a coupon microservice
+            //if (basket.CouponCode == "SM360")
+            //{
+            //    foreach (BasketItem item in basket.Items)
+            //    {
+            //        item.UnitPrice = item.UnitPrice - (item.UnitPrice * (decimal)0.1);
+            //    }
+            //}
+            //else
+            //{ 
+                throw new System.NotImplementedException(); 
+            //}
+            //return basket;
+        }
+    }
+}

src/Web/WebMVC/Services/IBasketService.cs

@@ -11,6 +11,7 @@ namespace Microsoft.eShopOnContainers.WebMVC.Services
         Task AddItemToBasket(ApplicationUser user, int productId);
         Task<Basket> UpdateBasket(Basket basket);
         Task Checkout(BasketDTO basket);
+        Task<Basket> ApplyCoupon(Basket basket);
         Task<Basket> SetQuantities(ApplicationUser user, Dictionary<string, int> quantities);
         Task<Order> GetOrderDraft(string basketId);
     }

src/Web/WebMVC/Services/ICouponService.cs

@@ -0,0 +1,13 @@
+using Microsoft.AspNetCore.Mvc.Rendering;
+using Microsoft.eShopOnContainers.WebMVC.ViewModels;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using WebMVC.Services.ModelDTOs;
+
+namespace Microsoft.eShopOnContainers.WebMVC.Services
+{
+    public interface ICouponService
+    {
+        Basket Apply(Basket basket);
+    }
+}

src/Web/WebMVC/ViewModels/Basket.cs

@@ -15,6 +15,7 @@ namespace Microsoft.eShopOnContainers.WebMVC.ViewModels
 
         public decimal Total()
         {
+            // What is we apply the discount here
             return Math.Round(Items.Sum(x => x.UnitPrice * x.Quantity), 2);
         }
     }

src/Web/WebMVC/ViewModels/Order.cs

@@ -61,7 +61,7 @@ namespace Microsoft.eShopOnContainers.WebMVC.ViewModels
 
         [Required]
         public Guid RequestId { get; set; }
-
+        public string CouponCode { get; internal set; }
 
         public void CardExpirationShortFormat()
         {