freeCodeCamp/controllers/challenges.js

/**
 * GET /
 * Challenges.
 */
var _ = require('lodash'),
    debug = require('debug')('freecc:cntr:challenges'),
    Challenge = require('./../models/Challenge');

exports.returnChallenge = function(req, res, next) {
  var challengeNumber = parseInt(req.params.challengeNumber) || 0;

  if (challengeNumber > 59) {
    challengeNumber = 0;
  }

  Challenge.findOne({ challengeNumber: challengeNumber }, function(err, c) {
    if (err) {
      debug('Challenge err: ', err);
      return next(err);
    }
    res.render('challenges/show', {
      title: 'Challenge: ' + c.name,
      name: c.name,
      video: c.video,
      time: c.time,
      steps: c.steps,
      cc: req.user.challengesHash
    });
  });
};