Добавить функционал добавления продукта в корзину.

***
- добавил таблицу корзины в БД.
- реализовал сервис для функционала корзины.
- добавил страницу для отображения продуктов в корзине.
- Реализовал функционал удаления продукта из корзины.
***

PhoneStore/Controllers/BasketController.cs

+using Microsoft.AspNetCore.Mvc;
+using PhoneStore.Enums;
+using PhoneStore.Services.Abstractions;
+using PhoneStore.ViewModels;
+
+namespace PhoneStore.Controllers
+{
+    public class BasketController : Controller
+    {
+        private readonly IBasketService _basketService;
+
+        public BasketController(IBasketService basketService)
+        {
+            _basketService = basketService;
+        }
+
+        [HttpGet]
+        public IActionResult Add(int id)
+        {
+            var result = _basketService.AddPhone(id);
+            ResponseMessageViewModel response = result switch
+            {
+                StatusCodes.Success => new ResponseMessageViewModel {Message = "Продукт успешно добавлен"},
+                StatusCodes.EntityNotFound => new ResponseMessageViewModel {Message = "Продукт не найден"},
+                _ => new ResponseMessageViewModel {Message = "Продукт не найден"}
+            };
+
+            response.Status = result;
+            
+            return View(response);
+        }
+
+        public IActionResult Index()
+        {
+            var baskets = _basketService.GetAll();
+            return View(baskets);
+        }
+
+        [HttpGet]
+        public IActionResult Remove(int id)
+        {
+            _basketService.Remove(id);
+
+            return RedirectToAction("Index");
+        }
+    }
+}
\ No newline at end of file

PhoneStore/Controllers/PhoneController.cs

 using System.Collections.Generic;
 using System.Linq;
+using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using PhoneStore.Models;
 
@@ -13,7 +14,10 @@ namespace PhoneStore.Controllers
         {
             _db = db;
         }
-
+        /// <summary>
+        /// Действие, которое возвращает страницу со списком смартфонов
+        /// </summary>
+        /// <returns></returns>
         [HttpGet]
         public IActionResult Index()
         {

PhoneStore/Enums/StatusCodes.cs

+namespace PhoneStore.Enums
+{
+    public enum StatusCodes
+    {
+        Success = 200,
+        Error = 500,
+        EntityNotFound = 400
+    }
+}
\ No newline at end of file

PhoneStore/Migrations/20220616111154_AddBasketEntity.Designer.cs

+// <auto-generated />
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using PhoneStore.Models;
+
+namespace PhoneStore.Migrations
+{
+    [DbContext(typeof(MobileContext))]
+    [Migration("20220616111154_AddBasketEntity")]
+    partial class AddBasketEntity
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "5.0.17");
+
+            modelBuilder.Entity("PhoneStore.Models.Basket", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PhoneId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneId");
+
+                    b.ToTable("Baskets");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Order", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Address")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("ContactPhone")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("PhoneId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("UserName")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneId");
+
+                    b.ToTable("Orders");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Phone", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Company")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.Property<decimal>("Price")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Phones");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Basket", b =>
+                {
+                    b.HasOne("PhoneStore.Models.Phone", "Phone")
+                        .WithMany()
+                        .HasForeignKey("PhoneId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Phone");
+                });
+
+            modelBuilder.Entity("PhoneStore.Models.Order", b =>
+                {
+                    b.HasOne("PhoneStore.Models.Phone", "Phone")
+                        .WithMany()
+                        .HasForeignKey("PhoneId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Phone");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

PhoneStore/Migrations/20220616111154_AddBasketEntity.cs

+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace PhoneStore.Migrations
+{
+    public partial class AddBasketEntity : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Baskets",
+                columns: table => new
+                {
+                    Id = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true),
+                    PhoneId = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Baskets", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_Baskets_Phones_PhoneId",
+                        column: x => x.PhoneId,
+                        principalTable: "Phones",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Baskets_PhoneId",
+                table: "Baskets",
+                column: "PhoneId");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Baskets");
+        }
+    }
+}

PhoneStore/Migrations/MobileContextModelSnapshot.cs

@@ -15,6 +15,22 @@ namespace PhoneStore.Migrations
             modelBuilder
                 .HasAnnotation("ProductVersion", "5.0.17");
 
+            modelBuilder.Entity("PhoneStore.Models.Basket", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("PhoneId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("PhoneId");
+
+                    b.ToTable("Baskets");
+                });
+
             modelBuilder.Entity("PhoneStore.Models.Order", b =>
                 {
                     b.Property<int>("Id")
@@ -60,6 +76,17 @@ namespace PhoneStore.Migrations
                     b.ToTable("Phones");
                 });
 
+            modelBuilder.Entity("PhoneStore.Models.Basket", b =>
+                {
+                    b.HasOne("PhoneStore.Models.Phone", "Phone")
+                        .WithMany()
+                        .HasForeignKey("PhoneId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Phone");
+                });
+
             modelBuilder.Entity("PhoneStore.Models.Order", b =>
                 {
                     b.HasOne("PhoneStore.Models.Phone", "Phone")

PhoneStore/Models/Basket.cs

+using PhoneStore.ViewModels;
+
+namespace PhoneStore.Models
+{
+    public class Basket : BaseEntity
+    {
+        public int PhoneId { get; set; }
+        public virtual Phone Phone { get; set; }
+    }
+}
\ No newline at end of file

PhoneStore/Models/MobileContext.cs

@@ -6,6 +6,7 @@ namespace PhoneStore.Models
     {
         public DbSet<Phone> Phones { get; set; }
         public DbSet<Order> Orders { get; set; }
+        public DbSet<Basket> Baskets { get; set; }
 
         public MobileContext(DbContextOptions<MobileContext> options) : base(options)
         {

PhoneStore/Services/Abstractions/IBasketService.cs

+using System.Collections.Generic;
+using PhoneStore.Enums;
+using PhoneStore.Models;
+
+namespace PhoneStore.Services.Abstractions
+{
+    public interface IBasketService
+    {
+        StatusCodes AddPhone(int id);
+        List<Basket> GetAll();
+        void Remove(int id);
+    }
+}
\ No newline at end of file

PhoneStore/Services/BasketService.cs

+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.EntityFrameworkCore;
+using PhoneStore.Enums;
+using PhoneStore.Models;
+using PhoneStore.Services.Abstractions;
+
+namespace PhoneStore.Services
+{
+    public class BasketService : IBasketService
+    {
+        private readonly MobileContext _context;
+
+        public BasketService(MobileContext context)
+        {
+            _context = context;
+        }
+
+        public StatusCodes AddPhone(int id)
+        {
+            var exists = _context.Phones.Any(p => p.Id == id);
+            if (!exists) return StatusCodes.EntityNotFound;
+            
+            _context.Baskets.Add(new Basket{PhoneId = id});
+            _context.SaveChanges();
+                
+            return StatusCodes.Success;
+        }
+
+        public List<Basket> GetAll()
+        {
+            return _context.Baskets
+                .Include(b => b.Phone)
+                .ToList();
+        }
+
+        public void Remove(int id)
+        {
+            var basket = _context.Baskets.FirstOrDefault(b => b.PhoneId == id);
+            if (basket is null)
+            {
+                return;
+            }
+
+            _context.Baskets.Remove(basket);
+            _context.SaveChanges();
+        }
+    }
+}
\ No newline at end of file

PhoneStore/Startup.cs

+using System.Text;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using PhoneStore.Models;
+using PhoneStore.Services;
+using PhoneStore.Services.Abstractions;
 
 namespace PhoneStore
 {
@@ -16,18 +20,39 @@ namespace PhoneStore
         }
 
         public IConfiguration Configuration { get; }
+        private IServiceCollection _services;
 
         // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services)
         {
+            _services = services;
             string connection = Configuration.GetConnectionString("DefaultConnection");
             services.AddDbContext<MobileContext>(options => options.UseSqlite(connection));
             services.AddControllersWithViews();
+            services.AddScoped<IBasketService, BasketService>();
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
+            // app.Run(async context =>
+            // {
+            //     var sb = new StringBuilder();
+            //     sb.Append("<h1>Все сервисы</h1>");
+            //     sb.Append("<table>");
+            //     sb.Append("<tr><th>Тип</th><th>Lifetime</th><th>Реализация</th></tr>");
+            //     foreach (var svc in _services)
+            //     {
+            //         sb.Append("<tr>");
+            //         sb.Append($"<td>{svc.ServiceType.FullName}</td>");
+            //         sb.Append($"<td>{svc.Lifetime}</td>");
+            //         sb.Append($"<td>{svc.ImplementationType?.FullName}</td>");
+            //         sb.Append("</tr>");
+            //     }
+            //     sb.Append("</table>");
+            //     context.Response.ContentType = "text/html;charset=utf-8";
+            //     await context.Response.WriteAsync(sb.ToString());
+            // });
             if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
@@ -43,9 +68,7 @@ namespace PhoneStore
             app.UseStaticFiles();
 
             app.UseRouting();
-
-            app.UseAuthorization();
-
+            
             app.UseEndpoints(endpoints =>
             {
                 endpoints.MapControllerRoute(

PhoneStore/ViewModels/BaseEntity.cs

+namespace PhoneStore.ViewModels
+{
+    public class BaseEntity
+    {
+        public int Id { get; set; }
+    }
+}
\ No newline at end of file

PhoneStore/ViewModels/ResponseMessageViewModel.cs

+using PhoneStore.Enums;
+
+namespace PhoneStore.ViewModels
+{
+    public class ResponseMessageViewModel
+    {
+        public string Message { get; set; }
+        public StatusCodes Status { get; set; }
+    }
+}
\ No newline at end of file

PhoneStore/Views/Basket/Add.cshtml

+@model ResponseMessageViewModel
+
+@{
+    ViewBag.Title = "title";
+    Layout = "_Layout";
+}
+
+<h2>@Model.Status : @Model.Message</h2>
+
+<a asp-action="Index" asp-controller="Basket">Перейти в корзину</a>

PhoneStore/Views/Basket/Index.cshtml

+@model List<Basket>
+
+@{
+    ViewBag.Title = "title";
+    Layout = "_Layout";
+}
+
+<h2>Корзина</h2>
+<table style="width: 100%">
+    <tr>
+        <th>Id</th>
+        <th>Наименование</th>
+        <th>Компания</th>
+        <th>Стоимость</th>
+        <th></th>
+    </tr>
+    @foreach (var basket in Model)
+    {
+        <tr>
+            <td>@basket.PhoneId</td>
+            <td>@basket.Phone.Name</td>
+            <td>@basket.Phone.Company</td>
+            <td>@basket.Phone.Price</td>
+            <td><a asp-route-id="@basket.PhoneId" asp-action="Remove" asp-controller="Basket" class="btn btn-outline-danger">Удалить из корзины</a></td>
+        </tr>
+    }
+</table>
\ No newline at end of file

PhoneStore/Views/Phone/Index.cshtml

@@ -6,7 +6,7 @@
 }
 
 <a asp-action="Create" asp-controller="Phone">Добавить устройство</a>
-
+@* https://localhost:5001/Phone/Create method GET*@
 @if (Model.Count == 0)
 {
     <h2>Список пуст.</h2>
@@ -20,6 +20,7 @@ else
             <th>Наименование</th>
             <th>Компания</th>
             <th>Стоимость</th>
+            <th></th>
         </tr>
         @foreach (var phone in Model)
         {
@@ -28,6 +29,14 @@ else
                 <td>@phone.Name</td>
                 <td>@phone.Company</td>
                 <td>@phone.Price</td>
+                <td>
+                    <a asp-route-id="@phone.Id"
+                        asp-action="Add"
+                        asp-controller="Basket"
+                        class="btn btn-outline-warning">
+                        В корзину
+                    </a>
+                </td>
             </tr>
         }
     </table>

PhoneStore/Views/_ViewImports.cshtml

 @using PhoneStore
 @using PhoneStore.Models
+@using PhoneStore.ViewModels
 @addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
\ No newline at end of file