Add project

src/Web/Extensions/IServiceCollectionExtensions.cs

@@ -0,0 +1,21 @@
+using Microsoft.EntityFrameworkCore;
+using Web.Data;
+using Web.Services;
+namespace Web.Extensions;
+
+internal static class IServiceCollectionExtensions
+{
+    public static IServiceCollection AddInternalServices(this IServiceCollection services)
+    {
+        services.AddScoped<IOrdersService, OrdersService>();
+        return services;
+    }
+
+    public static IServiceCollection AddDbAccess(this IServiceCollection services, IConfiguration configuration)
+    {
+        string connectionString = configuration.GetConnectionString("DbContext")
+            ?? throw new InvalidOperationException("DB connection string is not set");
+        services.AddDbContext<AppDbContext>(opts => opts.UseNpgsql(connectionString));
+        return services;
+    }
+}