UserPage-based Registration Form

<?php

use code\Model as Model;
use code\Action as Action;

class UserPage extends Page
{
    static public $description = 'Sign In to Your Account';
}

class UserPage_Controller extends Page_Controller
{
    private $showUserSigninForm = false;
    private $showInactivityMessage = false;
    private $showLoginMessage = false;
    private $showLockoutMessage = false;

    static $allowed_actions = array(
        'index',
        'edit',
        'login',
        'logout',
        'test',
        'register',
        'RegistrationForm',
        'doRegister',
        'profile'
    );

    public function __construct($dataRecord = null)
    {
        parent::__construct($dataRecord);

        if (!empty($_GET['inactivity'])) {
            $this->showInactivityMessage = true;
        }

        if (!empty($_GET['login'])) {
            $this->showLoginMessage = true;
        }
    }

    public function login()
    {
        $this->redirect('Security/login');
    }

    public function logout()
    {
        $this->redirect('Security/logout');
    }

    public function ShowUserSigninForm()
    {
        return $this->showUserSigninForm;
    }

    public function ShowInactivityMessage()
    {
        return $this->showInactivityMessage;
    }

    public function ShowLoginMessage()
    {
        return $this->showLoginMessage;
    }

    public function ShowLockoutMessage()
    {
        return $this->showLockoutMessage;
    }

    public function index(SS_HTTPRequest $request)
    {
        return $this->renderWith(array('UserPage', 'Page'));
    }

    /**
     * Determines if we show the sitemap and security badges in the footer
     *
     * @return bool
     */
    public function ShowSiteMap()
    {
        return TRUE;
    }

    /**
     * Determines if we show the legal disclaimers in the footer
     *
     * @return bool
     */
    public function ShowLegalDisclaimers()
    {
        return TRUE;
    }

    /**
     * Determines if we show the footer at all
     *
     * @return bool
     */
    public function ShowFooter()
    {
        return (bool) ($this->ShowSiteMap() || $this->ShowLegalDisclaimers());
    }

    public function register(SS_HTTPRequest $request)
    {
        return $this->RegistrationForm();
    }

    //Generate the registration form
    function RegistrationForm()
    {
        $contactMethods = MemberHelper::$bestContactMethods;
        $alertOptions = MemberHelper::$alertOptions;

        try {
            $fields = new FieldList(
                new TextField('FirstName', 'First Name'),
                new TextField('Surname', 'Last Name'),
                new TextField('Email', 'Email'),
                new TextField('Address', 'Address'),
                new TextField('City', 'City'),
                new TextField('State', 'State'),
                new TextField('Zip', 'Zip'),
                new PhoneNumberField('PhoneHome', 'Home Phone'),
                new PhoneNumberField('PhoneCell', 'Cell Phone'),
                new PhoneNumberField('PhoneWork', 'Work Phone'),
                new PhoneNumberField('PhoneEmployer', 'Employer Phone'),
                new TextField('Employer', 'Employer'),
                new DropdownField('BestContactMethod', 'Best Contact Method', $contactMethods),
                new OptionsetField('AlertPreferences', 'Alert Preferences', $alertOptions)
            );
        }
        catch (Exception $e) {
            throw new Exception("Unable to generate the field list.");
        }

        // Create action
        $actions = new FieldList(
            new FormAction('doRegister', 'Register')
        );

        // Create action
        $validator = new RequiredFields('FirstName', 'Surname', 'Email', 'Address', 'City', 'State', 'Zip', 'PhoneHome', 'BestContactMethod');

        //Now build said form
        try {
            $form = new Form($this, 'RegistrationForm', $fields, $actions, $validator);
        }
        catch (Exception $e) {
            throw new Exception("Unable to generate the form captain!");
        }

        // Load the form with previously sent data
        $form->loadDataFrom($this->request->postVars());

        //Return what you built
        return $form;
    }

    //Submit the registration form
    function doRegister($data, Form $form)
    {
        //Check for existing member email address
        if ($member = DataObject::get_one("Member", "`Email` = '". Convert::raw2sql($data['Email']) . "'"))
        {
            //Set error message
            $form->AddErrorMessage('Email', "Sorry, that email address already exists. Please choose another.", 'bad');

            //Set form data from submitted values
            Session::set("FormInfo.Form_RegistrationForm.data", $data);

            //Return back to form
            return $this->redirectBack();
        }

        //Otherwise create new member and log them in
        $Member = new Member();
        $form->saveInto($Member);
        $Member->write();
        $Member->login();
        $g = Group::$allowed_actions;

        $userGroup = DataObject::get_one('Group', "Code = 'customers'");

        //Find or create the 'user' group
        if (!$userGroup)
        {
            $userGroup = new Group();
            $userGroup->Code = "customers";
            $userGroup->Title = "Customers";
            $userGroup->Write();
            $userGroup->Members()->add($Member);
        }

        //Add member to user group
        $userGroup->Members()->add($Member);

        return $this->redirect('/user/profile');
    }
}