Router.route

links.js

router.route('/:linkid')
  .all(function(req, res, next) {
    res.linkid = req.params.linkid;

    Link.findOne({
      '_creator': req.user._id, 
      '_id': res.linkid
    }, function(err, link, count) {
      if(err || !link) {
        res.status(404);
        res.render('error', {message: 'Not found'});
        return;
      }

      res.link = link;
      next();
    })
  })
  .get(function(req, res) {
    res.render('links', {
      links: res.links,
      title: 'Your links',
      linkid: res.linkid,
      link: res.link,
      user: req.user ? req.user : null
    })
  })
  .put(function(req, res) {
    readLink(res.link.url, function(err, summary) {
      if(err) {
        res.status(400);
        res.send('Failed to fetch link: '+req.param('link'));
        return;
      }

      res.link.addedDate = Date.now();
      res.link.title = summary.title,
      res.link.image = summary.image,
      res.link.sentiment = summary.sentiment,
      res.link.keywords = summary.topics,
      res.link.words = summary.words,
      res.link.difficulty = summary.difficulty,
      res.link.readingTime = summary.minutes

      res.link.save(function(err, link) {
        if(err) {
          res.status(400);
          res.send('Could not save link')
        }

        res.send('OK');
      })
    })
  })
  .delete(function(req, res) {
    res.link.remove(function(err, link) {
      res.send('Remove successful');
    })
  })