Refactoring Services (#61)

* Refactoring ViewModels into Razor Pages models

* Cleaning up Basket viewcomponent

* Refactoring services.
Fixed bug in basket item counter.

src/WebRazorPages/Interfaces/IBasketService.cs → src/ApplicationCore/Interfaces/IBasketService.cs

@@ -1,12 +1,11 @@
-using Microsoft.eShopWeb.RazorPages.ViewModels;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
-namespace Microsoft.eShopWeb.RazorPages.Interfaces
+namespace ApplicationCore.Interfaces
 {
     public interface IBasketService
     {
-        Task<BasketViewModel> GetOrCreateBasketForUser(string userName);
+        Task<int> GetBasketItemCountAsync(string userName);
         Task TransferBasketAsync(string anonymousId, string userName);
         Task AddItemToBasket(int basketId, int catalogItemId, decimal price, int quantity);
         Task SetQuantities(int basketId, Dictionary<string, int> quantities);

src/ApplicationCore/Interfaces/IOrderService.cs

@@ -1,4 +1,5 @@
 using ApplicationCore.Entities.OrderAggregate;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace ApplicationCore.Interfaces

src/Web/Services/BasketService.cs → src/ApplicationCore/Services/BasketService.cs

@@ -1,13 +1,11 @@
 using ApplicationCore.Interfaces;
+using System.Threading.Tasks;
+using System.Collections.Generic;
 using ApplicationCore.Specifications;
 using Microsoft.eShopWeb.ApplicationCore.Entities;
-using Microsoft.eShopWeb.Interfaces;
-using Microsoft.eShopWeb.ViewModels;
-using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 
-namespace Microsoft.eShopWeb.Services
+namespace ApplicationCore.Services
 {
     public class BasketService : IBasketService
     {
@@ -27,85 +25,50 @@ namespace Microsoft.eShopWeb.Services
             _itemRepository = itemRepository;
         }
 
-        public async Task<BasketViewModel> GetOrCreateBasketForUser(string userName)
+        public async Task AddItemToBasket(int basketId, int catalogItemId, decimal price, int quantity)
         {
-            var basketSpec = new BasketWithItemsSpecification(userName);
-            var basket = (await _basketRepository.ListAsync(basketSpec)).FirstOrDefault();
-
-            if(basket == null)
-            {
-                return await CreateBasketForUser(userName);
-            }
-            return CreateViewModelFromBasket(basket);
-        }
+            var basket = await _basketRepository.GetByIdAsync(basketId);
 
-        private BasketViewModel CreateViewModelFromBasket(Basket basket)
-        {
-            var viewModel = new BasketViewModel();
-            viewModel.Id = basket.Id;
-            viewModel.BuyerId = basket.BuyerId;
-            viewModel.Items = basket.Items.Select(i =>
-            {
-                var itemModel = new BasketItemViewModel()
-                {
-                    Id = i.Id,
-                    UnitPrice = i.UnitPrice,
-                    Quantity = i.Quantity,
-                    CatalogItemId = i.CatalogItemId
+            basket.AddItem(catalogItemId, price, quantity);
 
-                };
-                var item = _itemRepository.GetById(i.CatalogItemId);
-                itemModel.PictureUrl = _uriComposer.ComposePicUri(item.PictureUri);
-                itemModel.ProductName = item.Name;
-                return itemModel;
-            })
-                            .ToList();
-            return viewModel;
+            await _basketRepository.UpdateAsync(basket);
         }
 
-        public async Task<BasketViewModel> CreateBasketForUser(string userId)
+        public async Task DeleteBasketAsync(int basketId)
         {
-            var basket = new Basket() { BuyerId = userId };
-            await _basketRepository.AddAsync(basket);
+            var basket = await _basketRepository.GetByIdAsync(basketId);
 
-            return new BasketViewModel()
-            {
-                BuyerId = basket.BuyerId,
-                Id = basket.Id,
-                Items = new List<BasketItemViewModel>()
-            };
+            await _basketRepository.DeleteAsync(basket);
         }
 
-        public async Task AddItemToBasket(int basketId, int catalogItemId, decimal price, int quantity)
+        public async Task<int> GetBasketItemCountAsync(string userName)
         {
-            var basket = await _basketRepository.GetByIdAsync(basketId);
-
-            basket.AddItem(catalogItemId, price, quantity);
-
-            await _basketRepository.UpdateAsync(basket);
+            var basketSpec = new BasketWithItemsSpecification(userName);
+            var basket = (await _basketRepository.ListAsync(basketSpec)).FirstOrDefault();
+            if (basket == null)
+            {
+                _logger.LogInformation($"No basket found for {userName}");
+                return 0;
+            }
+            int count = basket.Items.Sum(i => i.Quantity);
+            _logger.LogInformation($"Basket for {userName} has {count} items.");
+            return count;
         }
 
-        public async Task SetQuantities(int basketId, Dictionary<string,int> quantities)
+        public async Task SetQuantities(int basketId, Dictionary<string, int> quantities)
         {
             var basket = await _basketRepository.GetByIdAsync(basketId);
             foreach (var item in basket.Items)
             {
                 if (quantities.TryGetValue(item.Id.ToString(), out var quantity))
                 {
-                    _logger.LogWarning($"Updating quantity of item ID:{item.Id} to {quantity}.");
+                    _logger.LogInformation($"Updating quantity of item ID:{item.Id} to {quantity}.");
                     item.Quantity = quantity;
                 }
             }
             await _basketRepository.UpdateAsync(basket);
         }
 
-        public async Task DeleteBasketAsync(int basketId)
-        {
-            var basket = await _basketRepository.GetByIdAsync(basketId);
-            
-            await _basketRepository.DeleteAsync(basket);
-        }
-
         public async Task TransferBasketAsync(string anonymousId, string userName)
         {
             var basketSpec = new BasketWithItemsSpecification(anonymousId);

src/Infrastructure/Services/OrderService.cs → src/ApplicationCore/Services/OrderService.cs

@@ -4,7 +4,7 @@ using System.Threading.Tasks;
 using Microsoft.eShopWeb.ApplicationCore.Entities;
 using System.Collections.Generic;
 
-namespace Infrastructure.Services
+namespace ApplicationCore.Services
 {
     public class OrderService : IOrderService
     {

src/Infrastructure/Infrastructure.csproj

@@ -21,6 +21,7 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="Data\Migrations\" />
+    <Folder Include="Services\" />
   </ItemGroup>
 
 </Project>

src/Web/Controllers/AccountController.cs

@@ -5,9 +5,8 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
 using Infrastructure.Identity;
 using System;
-using Web;
 using Microsoft.AspNetCore.Authentication;
-using Microsoft.eShopWeb.Interfaces;
+using ApplicationCore.Interfaces;
 
 namespace Microsoft.eShopWeb.Controllers
 {

src/Web/Controllers/BasketController.cs

@@ -22,8 +22,10 @@ namespace Microsoft.eShopWeb.Controllers
         private readonly SignInManager<ApplicationUser> _signInManager;
         private readonly IAppLogger<BasketController> _logger;
         private readonly IOrderService _orderService;
+        private readonly IBasketViewModelService _basketViewModelService;
 
         public BasketController(IBasketService basketService,
+            IBasketViewModelService basketViewModelService,
             IOrderService orderService,
             IUriComposer uriComposer,
             SignInManager<ApplicationUser> signInManager,
@@ -34,6 +36,7 @@ namespace Microsoft.eShopWeb.Controllers
             _signInManager = signInManager;
             _logger = logger;
             _orderService = orderService;
+            _basketViewModelService = basketViewModelService;
         }
 
         [HttpGet]
@@ -87,10 +90,10 @@ namespace Microsoft.eShopWeb.Controllers
         {
             if (_signInManager.IsSignedIn(HttpContext.User))
             {
-                return await _basketService.GetOrCreateBasketForUser(User.Identity.Name);
+                return await _basketViewModelService.GetOrCreateBasketForUser(User.Identity.Name);
             }
             string anonymousId = GetOrSetBasketCookie();
-            return await _basketService.GetOrCreateBasketForUser(anonymousId);
+            return await _basketViewModelService.GetOrCreateBasketForUser(anonymousId);
         }
 
         private string GetOrSetBasketCookie()

src/Web/Interfaces/IBasketService.cs

@@ -1,15 +1,10 @@
 using Microsoft.eShopWeb.ViewModels;
-using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace Microsoft.eShopWeb.Interfaces
 {
-    public interface IBasketService
+    public interface IBasketViewModelService
     {
         Task<BasketViewModel> GetOrCreateBasketForUser(string userName);
-        Task TransferBasketAsync(string anonymousId, string userName);
-        Task AddItemToBasket(int basketId, int catalogItemId, decimal price, int quantity);
-        Task SetQuantities(int basketId, Dictionary<string, int> quantities);
-        Task DeleteBasketAsync(int basketId);
     }
 }

src/Web/Services/BasketViewModelService.cs

@@ -0,0 +1,76 @@
+using ApplicationCore.Interfaces;
+using ApplicationCore.Specifications;
+using Microsoft.eShopWeb.ApplicationCore.Entities;
+using Microsoft.eShopWeb.Interfaces;
+using Microsoft.eShopWeb.ViewModels;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Microsoft.eShopWeb.Services
+{
+    public class BasketViewModelService : IBasketViewModelService
+    {
+        private readonly IAsyncRepository<Basket> _basketRepository;
+        private readonly IUriComposer _uriComposer;
+        private readonly IRepository<CatalogItem> _itemRepository;
+
+        public BasketViewModelService(IAsyncRepository<Basket> basketRepository,
+            IRepository<CatalogItem> itemRepository,
+            IUriComposer uriComposer)
+        {
+            _basketRepository = basketRepository;
+            _uriComposer = uriComposer;
+            _itemRepository = itemRepository;
+        }
+
+        public async Task<BasketViewModel> GetOrCreateBasketForUser(string userName)
+        {
+            var basketSpec = new BasketWithItemsSpecification(userName);
+            var basket = (await _basketRepository.ListAsync(basketSpec)).FirstOrDefault();
+
+            if(basket == null)
+            {
+                return await CreateBasketForUser(userName);
+            }
+            return CreateViewModelFromBasket(basket);
+        }
+
+        private BasketViewModel CreateViewModelFromBasket(Basket basket)
+        {
+            var viewModel = new BasketViewModel();
+            viewModel.Id = basket.Id;
+            viewModel.BuyerId = basket.BuyerId;
+            viewModel.Items = basket.Items.Select(i =>
+            {
+                var itemModel = new BasketItemViewModel()
+                {
+                    Id = i.Id,
+                    UnitPrice = i.UnitPrice,
+                    Quantity = i.Quantity,
+                    CatalogItemId = i.CatalogItemId
+
+                };
+                var item = _itemRepository.GetById(i.CatalogItemId);
+                itemModel.PictureUrl = _uriComposer.ComposePicUri(item.PictureUri);
+                itemModel.ProductName = item.Name;
+                return itemModel;
+            })
+                            .ToList();
+            return viewModel;
+        }
+
+        private async Task<BasketViewModel> CreateBasketForUser(string userId)
+        {
+            var basket = new Basket() { BuyerId = userId };
+            await _basketRepository.AddAsync(basket);
+
+            return new BasketViewModel()
+            {
+                BuyerId = basket.BuyerId,
+                Id = basket.Id,
+                Items = new List<BasketItemViewModel>()
+            };
+        }
+    }
+}

src/Web/Services/CatalogService.cs

@@ -11,6 +11,10 @@ using ApplicationCore.Specifications;
 
 namespace Microsoft.eShopWeb.Services
 {
+    /// <summary>
+    /// This is a UI-specific service so belongs in UI project. It does not contain any business logic and works
+    /// with UI-specific types (view models and SelectListItem types).
+    /// </summary>
     public class CatalogService : ICatalogService
     {
         private readonly ILogger<CatalogService> _logger;

src/Web/Startup.cs

@@ -3,7 +3,6 @@ using ApplicationCore.Services;
 using Infrastructure.Data;
 using Infrastructure.Identity;
 using Infrastructure.Logging;
-using Infrastructure.Services;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
@@ -93,6 +92,7 @@ namespace Microsoft.eShopWeb
 
             services.AddScoped<ICatalogService, CachedCatalogService>();
             services.AddScoped<IBasketService, BasketService>();
+            services.AddScoped<IBasketViewModelService, BasketViewModelService>();
             services.AddScoped<IOrderService, OrderService>();
             services.AddScoped<IOrderRepository, OrderRepository>();
             services.AddScoped<CatalogService>();

src/Web/ViewComponents/Basket.cs

@@ -12,10 +12,10 @@ namespace Web.ViewComponents
 {
     public class Basket : ViewComponent
     {
-        private readonly IBasketService _basketService;
+        private readonly IBasketViewModelService _basketService;
         private readonly SignInManager<ApplicationUser> _signInManager;
 
-        public Basket(IBasketService basketService,
+        public Basket(IBasketViewModelService basketService,
                         SignInManager<ApplicationUser> signInManager)
         {
             _basketService = basketService;

src/WebRazorPages/Interfaces/IBasketViewModelService.cs

@@ -0,0 +1,11 @@
+using Microsoft.eShopWeb.RazorPages.ViewModels;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Microsoft.eShopWeb.RazorPages.Interfaces
+{
+    public interface IBasketViewModelService
+    {
+        Task<BasketViewModel> GetOrCreateBasketForUser(string userName);
+    }
+}

src/WebRazorPages/Pages/Account/Register.cshtml.cs

@@ -4,6 +4,7 @@ using Microsoft.AspNetCore.Mvc.RazorPages;
 using Microsoft.eShopWeb.RazorPages.ViewModels;
 using Microsoft.AspNetCore.Identity;
 using Infrastructure.Identity;
+using System.ComponentModel.DataAnnotations;
 
 namespace Microsoft.eShopWeb.RazorPages.Pages.Account
 {
@@ -23,6 +24,24 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Account
         [BindProperty]
         public RegisterViewModel UserDetails { get; set; }
 
+        public class RegisterViewModel
+        {
+            [Required]
+            [EmailAddress]
+            [Display(Name = "Email")]
+            public string Email { get; set; }
+
+            [Required]
+            [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
+            [DataType(DataType.Password)]
+            [Display(Name = "Password")]
+            public string Password { get; set; }
+
+            [DataType(DataType.Password)]
+            [Display(Name = "Confirm password")]
+            [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
+            public string ConfirmPassword { get; set; }
+        }
 
         public async Task<IActionResult> OnPost(string returnUrl = "/Index")
         {
@@ -38,7 +57,6 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Account
                 AddErrors(result);
             }
             return Page();
-
         }
 
         private void AddErrors(IdentityResult result)
@@ -48,6 +66,5 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Account
                 ModelState.AddModelError("", error.Description);
             }
         }
-
     }
 }

src/WebRazorPages/Pages/Account/Signin.cshtml.cs

@@ -1,14 +1,12 @@
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.RazorPages;
-using Microsoft.eShopWeb.RazorPages.ViewModels;
-using Microsoft.eShopWeb.RazorPages.Interfaces;
-using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Identity;
 using Infrastructure.Identity;
 using Microsoft.AspNetCore.Authentication;
 using System;
 using System.ComponentModel.DataAnnotations;
+using ApplicationCore.Interfaces;
 
 namespace Microsoft.eShopWeb.RazorPages.Pages.Account
 {

src/WebRazorPages/Pages/Basket/Index.cshtml.cs

@@ -22,8 +22,10 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Basket
         private readonly IAppLogger<IndexModel> _logger;
         private readonly IOrderService _orderService;
         private string _username = null;
+        private readonly IBasketViewModelService _basketViewModelService;
 
         public IndexModel(IBasketService basketService,
+            IBasketViewModelService basketViewModelService,
             IUriComposer uriComposer,
             SignInManager<ApplicationUser> signInManager,
             IAppLogger<IndexModel> logger,
@@ -34,6 +36,7 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Basket
             _signInManager = signInManager;
             _logger = logger;
             _orderService = orderService;
+            _basketViewModelService = basketViewModelService;
         }
 
         public BasketViewModel BasketModel { get; set; } = new BasketViewModel();
@@ -83,12 +86,12 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Basket
         {
             if (_signInManager.IsSignedIn(HttpContext.User))
             {
-                BasketModel = await _basketService.GetOrCreateBasketForUser(User.Identity.Name);
+                BasketModel = await _basketViewModelService.GetOrCreateBasketForUser(User.Identity.Name);
             }
             else
             {
                 GetOrSetBasketCookieAndUserName();
-                BasketModel = await _basketService.GetOrCreateBasketForUser(_username);
+                BasketModel = await _basketViewModelService.GetOrCreateBasketForUser(_username);
             }
         }
 

src/WebRazorPages/Pages/Components/Basket/Default.cshtml

@@ -1,4 +1,5 @@
-@model BasketComponentViewModel
+@using Microsoft.eShopWeb.RazorPages.ViewComponents
+@model Basket.BasketComponentViewModel
 
 @{
     ViewData["Title"] = "My Basket";

src/WebRazorPages/Pages/Order/Detail.cshtml.cs

@@ -1,8 +1,10 @@
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc.RazorPages;
-using Microsoft.eShopWeb.RazorPages.ViewModels;
 using ApplicationCore.Interfaces;
 using System.Linq;
+using System;
+using ApplicationCore.Entities.OrderAggregate;
+using System.Collections.Generic;
 
 namespace Microsoft.eShopWeb.RazorPages.Pages.Order
 {
@@ -17,6 +19,27 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Order
 
         public OrderViewModel OrderDetails { get; set; } = new OrderViewModel();
 
+        public class OrderViewModel
+        {
+            public int OrderNumber { get; set; }
+            public DateTimeOffset OrderDate { get; set; }
+            public decimal Total { get; set; }
+            public string Status { get; set; }
+
+            public Address ShippingAddress { get; set; }
+
+            public List<OrderItemViewModel> OrderItems { get; set; } = new List<OrderItemViewModel>();
+        }
+
+        public class OrderItemViewModel
+        {
+            public int ProductId { get; set; }
+            public string ProductName { get; set; }
+            public decimal UnitPrice { get; set; }
+            public decimal Discount { get; set; }
+            public int Units { get; set; }
+            public string PictureUrl { get; set; }
+        }
 
         public async Task OnGet(int orderId)
         {

src/WebRazorPages/Pages/Order/Index.cshtml.cs

@@ -1,10 +1,10 @@
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc.RazorPages;
-using Microsoft.eShopWeb.RazorPages.ViewModels;
 using ApplicationCore.Interfaces;
 using ApplicationCore.Specifications;
 using System.Collections.Generic;
 using System.Linq;
+using System;
 
 namespace Microsoft.eShopWeb.RazorPages.Pages.Order
 {
@@ -17,28 +17,25 @@ namespace Microsoft.eShopWeb.RazorPages.Pages.Order
             _orderRepository = orderRepository;
         }
 
-        public List<OrderViewModel> Orders { get; set; } = new List<OrderViewModel>();
+        public List<OrderSummary> Orders { get; set; } = new List<OrderSummary>();
 
+        public class OrderSummary
+        {
+            public int OrderNumber { get; set; }
+            public DateTimeOffset OrderDate { get; set; }
+            public decimal Total { get; set; }
+            public string Status { get; set; }
+        }
 
         public async Task OnGet()
         {
             var orders = await _orderRepository.ListAsync(new CustomerOrdersWithItemsSpecification(User.Identity.Name));
 
             Orders = orders
-                .Select(o => new OrderViewModel()
+                .Select(o => new OrderSummary()
                 {
                     OrderDate = o.OrderDate,
-                    OrderItems = o.OrderItems?.Select(oi => new OrderItemViewModel()
-                    {
-                        Discount = 0,
-                        PictureUrl = oi.ItemOrdered.PictureUri,
-                        ProductId = oi.ItemOrdered.CatalogItemId,
-                        ProductName = oi.ItemOrdered.ProductName,
-                        UnitPrice = oi.UnitPrice,
-                        Units = oi.Units
-                    }).ToList(),
                     OrderNumber = o.Id,
-                    ShippingAddress = o.ShipToAddress,
                     Status = "Pending",
                     Total = o.Total()
 

src/WebRazorPages/Pages/_LoginPartial.cshtml

@@ -30,7 +30,7 @@
         </section>
 
         <section class="col-lg-1 col-xs-12">
-            @await Component.InvokeAsync("Basket",  User.Identity.Name)
+            @await Component.InvokeAsync("Basket")
         </section>
 
 }

src/WebRazorPages/Services/BasketService.cs → src/WebRazorPages/Services/BasketViewModelService.cs

@@ -9,21 +9,18 @@ using Microsoft.eShopWeb.RazorPages.ViewModels;
 
 namespace Microsoft.eShopWeb.RazorPages.Services
 {
-    public class BasketService : IBasketService
+    public class BasketViewModelService : IBasketViewModelService
     {
         private readonly IAsyncRepository<Basket> _basketRepository;
         private readonly IUriComposer _uriComposer;
-        private readonly IAppLogger<BasketService> _logger;
         private readonly IRepository<CatalogItem> _itemRepository;
 
-        public BasketService(IAsyncRepository<Basket> basketRepository,
+        public BasketViewModelService(IAsyncRepository<Basket> basketRepository,
             IRepository<CatalogItem> itemRepository,
-            IUriComposer uriComposer,
-            IAppLogger<BasketService> logger)
+            IUriComposer uriComposer)
         {
             _basketRepository = basketRepository;
             _uriComposer = uriComposer;
-            this._logger = logger;
             _itemRepository = itemRepository;
         }
 
@@ -32,7 +29,7 @@ namespace Microsoft.eShopWeb.RazorPages.Services
             var basketSpec = new BasketWithItemsSpecification(userName);
             var basket = (await _basketRepository.ListAsync(basketSpec)).FirstOrDefault();
 
-            if(basket == null)
+            if (basket == null)
             {
                 return await CreateBasketForUser(userName);
             }
@@ -63,7 +60,7 @@ namespace Microsoft.eShopWeb.RazorPages.Services
             return viewModel;
         }
 
-        public async Task<BasketViewModel> CreateBasketForUser(string userId)
+        private async Task<BasketViewModel> CreateBasketForUser(string userId)
         {
             var basket = new Basket() { BuyerId = userId };
             await _basketRepository.AddAsync(basket);
@@ -75,44 +72,5 @@ namespace Microsoft.eShopWeb.RazorPages.Services
                 Items = new List<BasketItemViewModel>()
             };
         }
-
-        public async Task AddItemToBasket(int basketId, int catalogItemId, decimal price, int quantity)
-        {
-            var basket = await _basketRepository.GetByIdAsync(basketId);
-
-            basket.AddItem(catalogItemId, price, quantity);
-
-            await _basketRepository.UpdateAsync(basket);
-        }
-
-        public async Task SetQuantities(int basketId, Dictionary<string,int> quantities)
-        {
-            var basket = await _basketRepository.GetByIdAsync(basketId);
-            foreach (var item in basket.Items)
-            {
-                if (quantities.TryGetValue(item.Id.ToString(), out var quantity))
-                {
-                    _logger.LogWarning($"Updating quantity of item ID:{item.Id} to {quantity}.");
-                    item.Quantity = quantity;
-                }
-            }
-            await _basketRepository.UpdateAsync(basket);
-        }
-
-        public async Task DeleteBasketAsync(int basketId)
-        {
-            var basket = await _basketRepository.GetByIdAsync(basketId);
-            
-            await _basketRepository.DeleteAsync(basket);
-        }
-
-        public async Task TransferBasketAsync(string anonymousId, string userName)
-        {
-            var basketSpec = new BasketWithItemsSpecification(anonymousId);
-            var basket = (await _basketRepository.ListAsync(basketSpec)).FirstOrDefault();
-            if (basket == null) return;
-            basket.BuyerId = userName;
-            await _basketRepository.UpdateAsync(basket);
-        }
     }
 }

src/WebRazorPages/Services/CatalogService.cs

@@ -12,6 +12,10 @@ using System.Threading.Tasks;
 
 namespace Microsoft.eShopWeb.RazorPages.Services
 {
+    /// <summary>
+    /// This is a UI-specific service so belongs in UI project. It does not contain any business logic and works
+    /// with UI-specific types (view models and SelectListItem types).
+    /// </summary>
     public class CatalogService : ICatalogService
     {
         private readonly ILogger<CatalogService> _logger;

src/WebRazorPages/Startup.cs

@@ -3,7 +3,6 @@ using ApplicationCore.Services;
 using Infrastructure.Data;
 using Infrastructure.Identity;
 using Infrastructure.Logging;
-using Infrastructure.Services;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Http;
@@ -93,6 +92,7 @@ namespace Microsoft.eShopWeb.RazorPages
 
             services.AddScoped<ICatalogService, CachedCatalogService>();
             services.AddScoped<IBasketService, BasketService>();
+            services.AddScoped<IBasketViewModelService, BasketViewModelService>();
             services.AddScoped<IOrderService, OrderService>();
             services.AddScoped<IOrderRepository, OrderRepository>();
             services.AddScoped<CatalogService>();

src/WebRazorPages/ViewComponents/Basket.cs

@@ -1,10 +1,8 @@
-using Infrastructure.Identity;
+using ApplicationCore.Interfaces;
+using Infrastructure.Identity;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
-using Microsoft.eShopWeb.RazorPages.Interfaces;
-using Microsoft.eShopWeb.RazorPages.ViewModels;
-using System.Linq;
 using System.Threading.Tasks;
 
 namespace Microsoft.eShopWeb.RazorPages.ViewComponents
@@ -21,22 +19,26 @@ namespace Microsoft.eShopWeb.RazorPages.ViewComponents
             _signInManager = signInManager;
         }
 
-        public async Task<IViewComponentResult> InvokeAsync(string userName)
+        public async Task<IViewComponentResult> InvokeAsync()
         {
             var vm = new BasketComponentViewModel();
-            vm.ItemsCount = (await GetBasketViewModelAsync()).Items.Sum(i => i.Quantity);
+            string userName = GetUsername();
+            vm.ItemsCount = (await _basketService.GetBasketItemCountAsync(userName));
             return View(vm);
         }
 
-        private async Task<BasketViewModel> GetBasketViewModelAsync()
+        public class BasketComponentViewModel
+        {
+            public int ItemsCount { get; set; }
+        }
+
+        private string GetUsername()
         {
             if (_signInManager.IsSignedIn(HttpContext.User))
             {
-                return await _basketService.GetOrCreateBasketForUser(User.Identity.Name);
+                return User.Identity.Name;
             }
-            string anonymousId = GetBasketIdFromCookie();
-            if (anonymousId == null) return new BasketViewModel();
-            return await _basketService.GetOrCreateBasketForUser(anonymousId);
+            return GetBasketIdFromCookie();
         }
 
         private string GetBasketIdFromCookie()

src/WebRazorPages/ViewModels/BasketComponentViewModel.cs

@@ -1,7 +0,0 @@
-namespace Microsoft.eShopWeb.RazorPages.ViewModels
-{
-    public class BasketComponentViewModel
-    {
-        public int ItemsCount { get; set; }
-    }
-}

src/WebRazorPages/ViewModels/OrderItemViewModel.cs

@@ -1,18 +0,0 @@
-namespace Microsoft.eShopWeb.RazorPages.ViewModels
-{
-    public class OrderItemViewModel
-    {
-        public int ProductId { get; set; }
-
-        public string ProductName { get; set; }
-
-        public decimal UnitPrice { get; set; }
-
-        public decimal Discount { get; set; }
-
-        public int Units { get; set; }
-
-        public string PictureUrl { get; set; }
-    }
-
-}

src/WebRazorPages/ViewModels/OrderViewModel.cs

@@ -1,18 +0,0 @@
-using ApplicationCore.Entities.OrderAggregate;
-using System;
-using System.Collections.Generic;
-
-namespace Microsoft.eShopWeb.RazorPages.ViewModels
-{
-    public class OrderViewModel
-    {
-        public int OrderNumber { get; set; }
-        public DateTimeOffset OrderDate { get; set; }
-        public decimal Total { get; set; }
-        public string Status { get; set; }
-
-        public Address ShippingAddress { get; set; } 
-
-        public List<OrderItemViewModel> OrderItems { get; set; } = new List<OrderItemViewModel>();
-    }
-}

src/WebRazorPages/ViewModels/RegisterViewModel.cs

@@ -1,24 +0,0 @@
-using System;
-using System.ComponentModel.DataAnnotations;
-
-namespace Microsoft.eShopWeb.RazorPages.ViewModels
-{
-    public class RegisterViewModel
-    {
-        [Required]
-        [EmailAddress]
-        [Display(Name = "Email")]
-        public string Email { get; set; }
-
-        [Required]
-        [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
-        [DataType(DataType.Password)]
-        [Display(Name = "Password")]
-        public string Password { get; set; }
-
-        [DataType(DataType.Password)]
-        [Display(Name = "Confirm password")]
-        [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
-        public string ConfirmPassword { get; set; }
-    }
-}