Nexpress/Application.cs

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using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace Nexpress
{
    public class Application
    {
        private IList<Func<RequestDelegate, RequestDelegate>> middlewareList = new List<Func<RequestDelegate, RequestDelegate>>();
        private readonly List<RouteData> _routersList = new List<RouteData>();

        private RequestDelegate Last = (req, res) =>
        {
            return Task.CompletedTask;
        };
        
        public void Use(Func<Request, Response, RequestDelegate, Task> func)
        {
            Func<RequestDelegate, RequestDelegate> middleware = (next) =>
            {
                return new RequestDelegate((req, res) =>
                {
                    return func(req, res, next);
                });
            };
            middlewareList.Add(middleware);
        }

        public void Run(Func<Request, Response, Task> last)
        {
            Func<RequestDelegate, RequestDelegate> middleware = (next) =>
            {
                return new RequestDelegate(last);
            };
            middlewareList.Add(middleware);
        }

        public void Get(string route, Func<Request, Response, Task> handlers)
        {
            Bind("Get", route, new RequestDelegate(handlers));
        }

        public void Post(string route, Func<Request, Response, Task> handlers)
        {
            Bind("Post", route, new RequestDelegate(handlers));
        }

        public void Put(string route, Func<Request, Response, Task> handlers)
        {
            Bind("Put", route, new RequestDelegate(handlers));
        }

        public void Delete(string route, Func<Request, Response, Task> handlers)
        {
            Bind("Delete", route, new RequestDelegate(handlers));