Express Server with TypeScript

development.ts

import * as server from "./server";
new server.App

production.ts

import * as server from "./server";
new server.App('production',9090);

routes.ts

import * as path from "path" // normalize the paths : http://stackoverflow.com/questions/9756567/do-you-need-to-use-path-join-in-node-js
import express = require('express');

export class Routes {

  protected basePath: string;

  protected api: database.API;

  constructor(NODE_ENV: string){

    switch(NODE_ENV) {
      case 'production':
        this.basePath = '/app/dist';
        break;
      case 'development':
        this.basePath = '/app/public';
        break;
    }

  }

  defaultRoute(req: express.Request, res: express.Response){
    res.sendFile('index1.html', {root: path.join(process.cwd(), this.basePath)});
  }

  paths(app: express.Application) {

    app.get('/', (req: express.Request, res: express.Response) => {
      this.defaultRoute(req, res);
    });

    app.get('*', (req: express.Request, res: express.Response) => {
      this.defaultRoute(req, res);
    });

  }

}

server.ts

// set up ========================
import * as express from "express";
import * as morgan from "morgan"; // log requests to the console (express4)
import * as path from "path"; // normalize the paths : http://stackoverflow.com/questions/9756567/do-you-need-to-use-path-join-in-node-js
import * as bodyParser from "body-parser"; // pull information from HTML POST (express4)
import * as methodOverride from "method-override"; // simulate DELETE and PUT (express4)
import * as helmet from "helmet"; // Security
import * as compression from "compression";
import * as routes from "./routes";


export class App {

  protected app: express.Application;

  constructor(NODE_ENV: string = 'development', PORT: number = 8080){

    /**
     * Setting environment for development|production
     */
    process.env.NODE_ENV = process.env.NODE_ENV || NODE_ENV;

    /**
     * Setting port number
     */
    process.env.PORT = process.env.PORT || PORT;


    /**
     * Create our app w/ express
     */
    this.app = express();
    this.app.use(helmet());

    if(NODE_ENV === 'development'){
      this.app.use(express.static(path.join(process.cwd(), 'public')));
      this.app.use('/bower_components',  express.static(path.join(process.cwd(), 'bower_components'))); // set the static files location of bower_components
      this.app.use(morgan('dev'));  // log every request to the console
    }else{
      this.app.use(compression());
      this.app.use(express.static(path.join(process.cwd(), 'dist'), { maxAge: '7d' })); // set the static files location /public/img will be /img for users
    }

    this.app.use(bodyParser.urlencoded({'extended':true})); // parse application/x-www-form-urlencoded
    this.app.use(bodyParser.json()); // parse application/json
    this.app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json
    this.app.use(methodOverride());


    /**
     * Setting routes
   */
    let __routes = new routes.Routes(process.env.NODE_ENV);
    __routes.paths(this.app);

   /**
     * START the server
   */
   this.app.listen(process.env.PORT, function(){
     console.log('The server is running in port localhost: ', process.env.PORT);
   });

  }

}