This router module handles the home page. It does not require the user to be logged in, but we want to change the display a little if they are logged in:

router.get('/', async (req, res, next) => {
  try {
    let keylist = await notes.keylist();
    let keyPromises = keylist.map(key => { return notes.read(key) });
    let notelist = await Promise.all(keyPromises);
    res.render('index', { 
      title: 'Notes', notelist: notelist,
      user: req.user ? req.user : undefined
    });
  } catch (e) { next(e); }
});

Remember that we ensured that req.user has the user profile data, which we did in deserializeUser. We simply check for this and make sure to add that data when rendering the views template.

We'll be making similar changes to most of the other route definitions. After that, we'll go over the changes to the view templates in which we use req.user to show the correct buttons on each page.