refactor(service-config): Restructure service registration logic

src/SimplCommerce.WebHost/Extensions/ServiceCollectionExtensions.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IdentityModel.Tokens.Jwt;
 using System.IO;
 using System.Linq;
 using System.Net;
@@ -11,21 +12,20 @@
 using Microsoft.AspNetCore.Authentication.Cookies;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.AspNetCore.Authentication.OAuth;
-using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc.ApplicationParts;
-using Microsoft.Extensions.Localization;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Localization;
 using SimplCommerce.Infrastructure;
 using SimplCommerce.Infrastructure.Modules;
 using SimplCommerce.Infrastructure.Web.ModelBinders;
 using SimplCommerce.Module.Core.Data;
 using SimplCommerce.Module.Core.Extensions;
 using SimplCommerce.Module.Core.Models;
 using SimplCommerce.WebHost.IdentityServer;
-using System.IdentityModel.Tokens.Jwt;
 
 namespace SimplCommerce.WebHost.Extensions
 {
@@ -226,6 +226,29 @@ public static IServiceCollection AddCustomizedDataStore(this IServiceCollection
             return services;
         }
 
+        /// <summary>
+        /// Discovers and configures all modules in the application by finding and initializing their module initializers.
+        /// </summary>
+        /// <param name="services">The <see cref="IServiceCollection"/> to add module services to.</param>
+        /// <returns>The same service collection so that multiple calls can be chained.</returns>
+        public static IServiceCollection ConfigureModules(this IServiceCollection services)
+        {
+            foreach (var module in GlobalConfiguration.Modules)
+            {
+                var moduleInitializerType = module.Assembly.GetTypes()
+                    .FirstOrDefault(t => typeof(IModuleInitializer).IsAssignableFrom(t));
+
+                if (moduleInitializerType != null && moduleInitializerType != typeof(IModuleInitializer))
+                {
+                    var moduleInitializer = (IModuleInitializer)Activator.CreateInstance(moduleInitializerType);
+                    services.AddSingleton(typeof(IModuleInitializer), moduleInitializer);
+                    moduleInitializer.ConfigureServices(services);
+                }
+            }
+
+            return services;
+        }
+
         private static void TryLoadModuleAssembly(string moduleFolderPath, ModuleInfo module)
         {
             const string binariesFolderName = "bin";

src/SimplCommerce.WebHost/Program.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Linq;
 using System.Text.Encodings.Web;
 using System.Text.Unicode;
 using Microsoft.AspNetCore.Builder;
@@ -48,7 +47,6 @@ void ConfigureService()
     builder.Services.AddScoped<SlugRouteValueTransformer>();
 
     builder.Services.AddCustomizedLocalization();
-
     builder.Services.AddCustomizedMvc(GlobalConfiguration.Modules);
     builder.Services.Configure<RazorViewEngineOptions>(
         options => { options.ViewLocationExpanders.Add(new ThemeableViewLocationExpander()); });
@@ -60,18 +58,7 @@ void ConfigureService()
     builder.Services.AddTransient<IRazorViewRenderer, RazorViewRenderer>();
     builder.Services.AddAntiforgery(options => options.HeaderName = "X-XSRF-Token");
     builder.Services.AddCloudscribePagination();
-
-    foreach (var module in GlobalConfiguration.Modules)
-    {
-        var moduleInitializerType = module.Assembly.GetTypes()
-           .FirstOrDefault(t => typeof(IModuleInitializer).IsAssignableFrom(t));
-        if ((moduleInitializerType != null) && (moduleInitializerType != typeof(IModuleInitializer)))
-        {
-            var moduleInitializer = (IModuleInitializer)Activator.CreateInstance(moduleInitializerType);
-            builder.Services.AddSingleton(typeof(IModuleInitializer), moduleInitializer);
-            moduleInitializer.ConfigureServices(builder.Services);
-        }
-    }
+    builder.Services.ConfigureModules();
 
     builder.Services.AddMediatR(cfg => cfg.RegisterServicesFromAssembly(typeof(Program).Assembly));