feat: finalize core modules and gateway

src/Modules/TakeoutSaaS.Module.Messaging/Extensions/MessagingServiceCollectionExtensions.cs

@@ -0,0 +1,32 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using TakeoutSaaS.Module.Messaging.Abstractions;
+using TakeoutSaaS.Module.Messaging.Options;
+using TakeoutSaaS.Module.Messaging.Serialization;
+using TakeoutSaaS.Module.Messaging.Services;
+
+namespace TakeoutSaaS.Module.Messaging.Extensions;
+
+/// <summary>
+/// 消息队列模块注册扩展。
+/// </summary>
+public static class MessagingServiceCollectionExtensions
+{
+    /// <summary>
+    /// 注册 RabbitMQ 发布/订阅能力。
+    /// </summary>
+    public static IServiceCollection AddMessagingModule(this IServiceCollection services, IConfiguration configuration)
+    {
+        services.AddOptions<RabbitMqOptions>()
+            .Bind(configuration.GetSection("RabbitMQ"))
+            .ValidateDataAnnotations()
+            .ValidateOnStart();
+
+        services.AddSingleton<JsonMessageSerializer>();
+        services.AddSingleton<RabbitMqConnectionFactory>();
+        services.AddSingleton<IMessagePublisher, RabbitMqMessagePublisher>();
+        services.AddSingleton<IMessageSubscriber, RabbitMqMessageSubscriber>();
+
+        return services;
+    }
+}