server.js

require('dotenv').config();
const express = require('express');
const GitHubStrategy = require('passport-github').Strategy;
const passport = require('passport');
const session = require('express-session');
const app = express();

app.use(
  session({
    secret: process.env.SECRET,
    resave: false,
    saveUninitialized: false,
    cookie: {
      httpOnly: true,
      secure: false,
      maxAge: 24 * 60 * 60 * 1000,
    },
  })
);

app.use(passport.initialize());
app.use(passport.session());
passport.serializeUser(function (user, cb) {
  cb(null, user.id);
});

passport.deserializeUser(function (id, cb) {
  cb(null, id);
});

passport.use(
  new GitHubStrategy(
    {
      clientID: process.env.GITHUB_ID,
      clientSecret: process.env.GITHUB_SECRET,
      callbackURL: 'http://localhost:3000/auth/github/callback',
    },
    function (accessToken, refreshToken, profile, cb) {
      cb(null, profile);
    }
  )
);

const isAuth = (req, res, next) => {
  if (req.user) {
    next();
  } else {
    res.redirect('/login');
  }
};

app.get('/', isAuth, (req, res) => {
  res.sendFile(__dirname + '/dashboard.html');
});

app.get('/login', (req, res) => {
  if (req.user) {
    return res.redirect('/');
  }
  res.sendFile(__dirname + '/login.html');
});

app.get('/logout', (req, res) => {
  req.logOut();
  res.redirect('/login');
});

//auth
app.get('/auth/github', passport.authenticate('github'));

app.get(
  '/auth/github/callback',
  passport.authenticate('github', { failureRedirect: '/login' }),
  function (req, res) {
    // Successful authentication, redirect home.
    res.redirect('/');
  }
);

app.listen(3000, () => console.log('server is running on port 3000'));