server.js

require("dotenv").config();
const express = require("express");
const app = express();
const path = require("path");
const cors = require("cors");
const cookieeParser = require("cookie-parser");
const mongoose = require("mongoose");
const connectDB = require("./config/dbConn");

const { logger } = require("./middleware/logEvents");
const errorHandler = require("./middleware/errorHandler");
const crosOptions = require("./config/coreOptions");
const verifyJWT = require("./middleware/verifyJWT");
const PORT = process.env.PORT || 2500;

// Connect to mongoDB
connectDB();

// custom middleware
app.use(logger);

// Cros Origin Source Sharing ( Its Kind of Third Party Middleware )
// whiteList can only the origin which can access

app.use(cors(crosOptions));

// Buid-in middleware to handle urlencoded data
// in other words, form data;
// content-type: application/x-www-form-uelencoded
app.use(express.urlencoded({ extended: false }));

// build-in middleware for json
app.use(express.json());

// middleware for cookiees
app.use(cookieeParser());

// server static files
app.use("/", express.static(path.join(__dirname, "/public")));

// routes
// following routes we can access without token to genrate or register random person
app.use("/", require("./routes/root"));
app.use("/register", require("./routes/api/register"));
app.use("/auth", require("./routes/api/auth"));
app.use("/refresh", require("./routes/api/refresh"));
app.use("/logout", require("./routes/api/logout"));

// This route need authentication, so thats why I added the auth middleware to generate the token using which randon user cant access without permission
app.use(verifyJWT);
app.use("/employees", require("./routes/api/employees"));

// Any route that made this far, follwing response will get respectively
app.get("*", (req, res) => {
  res.status = 404;
  // if(req.accepted('html')){
  res.sendFile(path.join(__dirname, "views", "404.html"));
  // }else if(req.accepted('json')){
  // res.json({ error: '404 Not Found'})
  // }else {
  // res.type('txt').send('404 Not Found')
  // }
});

// Middleware respond the error if crosOptions send failed message
app.use(errorHandler);

mongoose.connection.once("open", () => {
  console.log("MongoDB Connected");
  app.listen(PORT, () => console.log(`Server running at PORT : ${PORT} ...`));
});