Major refactor. Add error handlers everywhere.

controllers/challenges.js

@@ -2,24 +2,29 @@
  * GET /
  * Challenges.
  */
-var Challenge = require('./../models/Challenge');
-var _ = require('lodash');
+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) {
-            console.error('Challenge err: ', err);
-            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
-        });
+  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
     });
-};
+  });
+};