结构型/代理模式/UserService1.cs

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namespace DesignModeConsole.结构型.代理模式;

/// <summary>
/// 通过让原始类和代理类都继承自一个接口来实现
/// </summary>
internal interface IUserService
{
    string GetUserName(int userId);

    bool Login(string account, string password);
}

internal class UserService : IUserService
{
    public string GetUserName(int userId)
    {
        return "用户名" + userId;
    }

    public bool Login(string account, string password)
    {
        return account == "admin" && password == "123456";
    }
}

/// <summary>
/// 用户服务代理类
/// </summary>
internal class UserServiceProxy : IUserService
{
    private readonly MetricsService _metricsService;
    private readonly UserService _userService;

    public UserServiceProxy(UserService userService)
    {
        _metricsService = new MetricsService();
        _userService = userService;
    }

    public string GetUserName(int userId)
    {
        _metricsService.WriteLog($"记录请求时间 内容是：{userId}");

        return _userService.GetUserName(userId);
    }

    public bool Login(string account, string password)
    {
        _metricsService.WriteLog($"记录请求日志 内容是：account：{account}  password：{password}");
        return _userService.Login(account, password);
    }
}