server.js

const express = require('express');
const app = express();
const path = require('path');
const cors = require('cors');
const corsOptions = require('./config/corsOptions');
const { logger } = require('./middleware/logEvents');
const errorHandler = require('./middleware/errorHandler');
const verifyJWT = require('./middleware/verifyJWT');
const cookieParser = require('cookie-parser');
const credentials = require('./middleware/credentials');

const PORT = process.env.PORT || 3500;

// custom middleware logger
app.use(logger);

// handle options credential check-before CORS!
// fetch cookies credential requirement
app.use(credentials);

// cross origins resource option
app.use(cors(corsOptions));

// built in middleware to handle urlEncoded data
// middleware is function that execute after server receive the request and before the response is sent to client
// in order words, form data:
// 'content-type: application/x-www-form-urlencoded'
app.use(express.urlencoded({ extended: false }));

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

// middleware for cookies
app.use(cookieParser());

// built in middleware serve // static files //
app.use('/', express.static(path.join(__dirname, '/public')));

// routes
app.use('/', require('./routes/root'));
app.use('/register', require('./routes/register'));
app.use('/auth', require('./routes/auth'));
app.use('/refresh', require('./routes/refresh'));
app.use('/logout', require('./routes/logout'));

// everything after this line must have verifyJWT
app.use(verifyJWT);

app.use('/employees', require('./routes/api/employees'));

// all route didnt cinclude
app.all('*', (req, res) => {
  // send file 404 
  res.status(404);
  if (req.accepts('html')) {
    res.sendFile(path.join(__dirname, 'views', '404.html'));
  } else if (req.accepts('json')) {
    res.json({ error: '404 Not Found' })
  } else {
    res.type('txt').send('404 Not Found');;
  }
});
app.use(errorHandler);

app.listen(PORT, () => { console.log(`Server running on port ${PORT} `) });