/**
 * User Registration
 * Sends a response object with success true if user was registered.
 * Sends a response object with success false if user couldn't be registered.
 */
router.post('/', function(req, res, next) {
    var userInfo = req.body;

    userInfo.email = sanitize(userInfo.email);
    userInfo.password = sanitize(userInfo.password);

    if(!validEmail(userInfo.email) || !validPassword(userInfo.password)) { //If the request info is invalid
        sendJsonResponse(res, false, error, 400);
    }
    else {
        //Check if e-mail already exists
        User.find({email: userInfo.email}, function(err, docs) {
            if(err) {
                console.log(err);
                sendJsonResponse(res, false, "There was an error processing your request.", 400);
            }
            else if(docs.length > 0) { //If e-mail was found in database, generate error
                sendJsonResponse(res, false, "This e-mail already exists, please login or use another e-mail.", 409);
            }
            else {
                //Create user based on data submitted.
                var user = new User({email: sanitize(userInfo.email), password: bcrypt.hashSync(sanitize(userInfo.password), 10), permission_level: 'REGULAR'});

                //Save it in the database.
                user.save(function (err) {
                    if (err) {
                        sendJsonResponse(res, false, "There was an error processing your request.", 400);
                    }
                    else { //If everything is fine

                        //Create token to login the registered user
                        var token = jwt.sign(user, config.secret, {
                            expiresIn: '24h' // expires in 24 hours
                        });

                        sendJsonResponse(res, true, "You have been registered!", 200, token);
                    }
                });
            }
        });
    }
    error = "";
});