EmailBill/Application/Extensions/ServiceCollectionExtensions.cs

namespace Application.Extensions;

/// <summary>
/// Application层服务注册扩展
/// </summary>
public static class ServiceCollectionExtensions
{
    /// <summary>
    /// 注册所有Application层服务
    /// </summary>
    public static IServiceCollection AddApplicationServices(this IServiceCollection services)
    {
        // 获取Application层程序集
        var assembly = typeof(ServiceCollectionExtensions).Assembly;

        // 自动注册所有以"Application"结尾的类
        // 匹配接口规则: IXxxApplication -> XxxApplication
        var applicationTypes = assembly.GetTypes()
            .Where(t => t.IsClass && !t.IsAbstract && t.Name.EndsWith("Application"))
            .ToList();

        foreach (var implementationType in applicationTypes)
        {
            // 查找对应的接口 IXxxApplication
            var interfaceType = implementationType.GetInterfaces()
                .FirstOrDefault(i => i.Name == $"I{implementationType.Name}");

            if (interfaceType != null)
            {
                services.AddScoped(interfaceType, implementationType);
            }
            else
            {
                // 如果没有接口，直接注册实现类
                services.AddScoped(implementationType);
            }
        }

        return services;
    }
}