using System;

using System.Linq;

using Castle.DynamicProxy;

namespace AopTest

{

    class AopTest

    {

        static public void Test()

        {

            var proxyGenerator = new ProxyGenerator();

            IUserService user = proxyGenerator.CreateClassProxy<UserService>(new UserRigthCheckProxy());

            user.GetUser("admin");

            user.GetUser("guest");

            user.UpdateUser("admin");

            user.UpdateUser("guest");

        }

    }

    public interface IUserService

    {

        void GetUser(string userId);

        void UpdateUser(string userId);

    }

    public class UserService : IUserService

    {

        public virtual void GetUser(string userId)

        {

            Console.WriteLine(userId + ",Welcome!");

        }

        public virtual void UpdateUser(string userId)

        {

            Console.WriteLine(userId + ",Updated!");

        }

    }

    public class UserRigthCheckProxy : IInterceptor

    {

        private static readonly string[] RightOperations = new string[] { "UpdateUser" };

        public void Intercept(IInvocation invocation)

        {

            if (invocation.Arguments.Length >  && invocation.Arguments[] is string)

            {

                if (RightOperations.Contains(invocation.Method.Name))

                {

                    var userId = (string) invocation.Arguments[];

                    if (userId == "admin")

                    {

                        Console.WriteLine("有权限操作 ");

                        invocation.Proceed();

                    }

                    else

                    {

                        Console.WriteLine("{0},您没有权限操作", userId);

                    }

                }

                else

                {

                    Console.WriteLine("有权限操作 ");

                    invocation.Proceed();

                }

            }

            else

            {

                invocation.Proceed();

            }

        }

    }

}