frontend/routes/auth.js

const express = require("express")
const passport = require("../middleware/passport")

const router = express.Router()

function saveReferer(req, res, next) {
  if (req.session != null) {
    req.session.loginReferrer = req.get("Referer")
    req.session.save()
  }

  next()
}

// Perform the login, after login Auth0 will redirect to callback
router.get("/login", saveReferer, passport.authenticate("auth0", {scope: "openid username profile"}), (req, res) => {  
  res.redirect("/")
})

router.get("/callback", function (req, res, next) {
  passport.authenticate("auth0", function (err, user, info) {
    if (err) { return next(err) }
    if (!user) { console.log(err, user, info); return res.redirect("/auth/login") }
    req.logIn(user, function (err) {
      if (err) { return next(err) }

      res.redirect(req.session.loginReferrer || "/");
    })
  })(req, res, next);
})

router.get("/user", (req, res) => {
  if (req.user == null) {
    return res.status(401).json({error: {message: "Unauthorized"}})
  }

  const name = req.user._json.name

  // TODO: Grab data from rpdata-api user database

  res.json({data: {
    name
  }})
})

router.get("/logout", saveReferer, (req, res) => {
  req.logout()

  res.redirect(req.session.loginReferrer || "/");
})

module.exports = router