index.ts

import http from "http";
import debug from "debug";

import App from "./server";

debug("ts-express:server");

class InitServer {
  private port: number | boolean | string;
  private server: any;

  constructor() {
    this.port = this.normalizePort(3000);
    App.set("port", this.port);
    this.server = http.createServer(App);
    this.server.listen(this.port);
    this.server.on("error", this.onError);
    this.server.on("listening", this.onListening);
    const PRODUCTION = App.get("env") === "production";
    const server = this.server;
    if (!PRODUCTION) {
      require("appmetrics-dash").monitor({ server , App });
    }
    const pino = require('pino')({
      level: PRODUCTION ? 'info' : 'debug',
    });
    App.use(require('express-pino-logger')({logger: pino}));
  }

  private normalizePort = (val: number | string): number | string | boolean => {
    let port: number = typeof val === "string" ? parseInt(val, 10) : val;
    if (isNaN(port)) return val;
    else if (port >= 0) return port;
    else return false;
  };

  private onError = (error: NodeJS.ErrnoException): void => {
    if (error.syscall !== "listen") throw error;
    let bind =
      typeof this.port === "string" ? "Pipe " + this.port : "Port " + this.port;
    switch (error.code) {
      case "EACCES":
        console.error(`${bind} requires elevated privileges`);
        process.exit(1);
        break;
      case "EADDRINUSE":
        console.error(`${bind} is already in use`);
        process.exit(1);
        break;
      default:
        throw error;
    }
  };

  private onListening = (): void => {
    console.log(`listening on ${this.port}`);
    let addr = this.server.address();
    let bind = typeof addr === "string" ? `pipe ${addr}` : `port ${addr.port}`;
    debug(`Listening on ${bind}`);
  };
}

new InitServer();