JavaScript example. Controller in for a NodeJS app.

JavaScript example

var userController = module.exports = {
    register:function (req, res, next) {
        var postValues = req.body;
        var newUser = new userModel();
        newUser.saveAndGetErrors(postValues, function(user){
            req.session.loggedIn = true;
            req.session.userId = user._id;
            if(req.body.returnUrl) res.redirect(res.body.returnUrl);
            else res.render("/user/profile", {user:user});
        },
        function(validationErrors){
            res.render('/user/create',{validationErrors:validationErrors});
        })
    },
    update:function (req, res, next) {
        throw new Error('Not implemented');
    },
    delete:function (req, res, next) {
        throw new Error('Not implemented');
    },
    login:function (req, res, next) {
        var loggedIn = userModel.user.model.login(req.username, req.password);
        if (loggedIn) res.redirect(req.body.targetUrl);
        else res.render('/home/login', {failed:true});
    }
};