Добавить начальные данные

***
- Добавил сервис по добавлению начальных данных.
- Прокинул инициализацию данных в Program. Теперь при старте программы, если в БД нет ролей и/или админа, то они добавятся.
***

PhoneStore/Program.cs

@@ -3,17 +3,35 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
+using PhoneStore.Models;
+using PhoneStore.Services;
 
 namespace PhoneStore
 {
     public class Program
     {
-        public static void Main(string[] args)
+        public static async Task Main(string[] args)
         {
-            CreateHostBuilder(args).Build().Run();
+            var host = CreateHostBuilder(args).Build();
+            using var scope = host.Services.CreateScope();
+            var services = scope.ServiceProvider;
+            try
+            {
+                var userManager = services.GetRequiredService<UserManager<User>>();
+                RoleManager<Role> rolesManager = services.GetRequiredService<RoleManager<Role>>();
+                await AdminInitializer.SeedAdminUser(rolesManager, userManager);
+            }
+            catch (Exception ex)
+            {
+                var logger = services.GetRequiredService<ILogger<Program>>();
+                logger.LogError(ex, "Не удалось добавить начальные данные в БД");
+            }
+            await host.RunAsync();
         }
 
         public static IHostBuilder CreateHostBuilder(string[] args) =>

PhoneStore/Services/AdminInitializer.cs

+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Identity;
+using PhoneStore.Models;
+
+namespace PhoneStore.Services
+{
+    public class AdminInitializer
+    {
+        public static async Task SeedAdminUser(
+            RoleManager<Role> roleManager,
+            UserManager<User> userManager)
+        {
+            string adminEmail = "admin@admin.com";
+            string adminPassword = "Admin1234@";
+  
+            var roles = new [] { "admin", "user" };
+ 
+            foreach (var role in roles)
+            {
+                if (await roleManager.FindByNameAsync(role) is null)
+                    await roleManager.CreateAsync(new Role(role));
+            }
+            if (await userManager.FindByNameAsync(adminEmail) == null)
+            {
+                User admin = new User { Email = adminEmail, UserName = adminEmail };
+                IdentityResult result = await userManager.CreateAsync(admin, adminPassword);
+                if (result.Succeeded)
+                    await userManager.AddToRoleAsync(admin, "admin");
+            }
+        }
+    }
+}
\ No newline at end of file

PhoneStore/Startup.cs

@@ -22,11 +22,12 @@ namespace PhoneStore
 
         public IConfiguration Configuration { get; }
 
-        // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services)
         {
             string connection = Configuration.GetConnectionString("DefaultConnection");
-            services.AddDbContext<MobileContext>(options => options.UseNpgsql(connection));
+            services.AddDbContext<MobileContext>(options => options.UseNpgsql(connection))
+                .AddIdentity<User, Role>()
+                .AddEntityFrameworkStores<MobileContext>();
             services.AddControllersWithViews();
             services.AddApplicationServices(Configuration);
         }