freeCodeCamp/server/boot/home.js

import { defaultProfileImage } from '../../common/utils/constantStrings.json';
import supportedLanguages from '../../common/utils/supported-languages';
import dedent from 'dedent';

const message =
  'Learn to Code and Help Nonprofits';

module.exports = function(app) {
  var router = app.loopback.Router();
  router.get('/', addDefaultImage, index);
  app.use(
      '/:lang',
      (req, res, next) => {
        // add url language to request for all routers
        req._urlLang = req.params.lang;
        next();
      },
      router
    );
  app.use(router);

  function addDefaultImage(req, res, next) {
    if (!req.user || req.user.picture) {
      return next();
    }
    return req.user.update$({ picture: defaultProfileImage })
      .subscribe(
        () => next(),
        next
      );
  }

  function index(req, res, next) {
    if (!supportedLanguages[req._urlLang]) {
      return next();
    }
    const { referer = '' } = req.headers;

    if (req.user) {
      if ((referer.indexOf('/settings') >= 1) && (req.user.isGithubCool)) {

        const msg = dedent`
              We've updated your profile based
              on your your GitHub account.
            `;
        const username = req.user.username;

        req.flash('info', { msg: msg});
        return res.redirect(`/${username}`);
      } else {
        return res.redirect('/challenges/current-challenge');
      }
    }

    return res.render('home', { title: message });
  }
};