Custom Thank You Page for Affiliate Signup

Hi,
my question is:
since i'd like to make a facebook ads campaign for affiliates for my product, i'd like to track my conversions, so i'd like to redirect the signup form for affiliates to a custom thank you page.

I tried to implement a plugin, but i have problems, because the brick works, but there is no redirection, after signup, the user goes straight to the member area.

i created a directory called 'tyaffform' and inside i put 2 files: tyaffform.php and brick.php and

in tyaffform.php there is:

PHP:

<?php

class Am_Plugin_tyaffform extends Am_Plugin
{
    const PLUGIN_STATUS = self::STATUS_PRODUCTION;
    const PLUGIN_REVISION = '0.1';
   
    // this will load the custom brick
    function onLoadBricks(Am_Event $event)
    {
        require_once dirname(__FILE__) . '/brick.php';
    }
 
    function onSignupUserUpdated (Am_Event $event){
        $this->store_tyaffpage_url($event->getvars());
    }
    function onSignupAffAdded(Am_Event $event){
        // getvars returns all form vars
        $this->store_tyaffpage_url($event->getvars());
    }
    function store_tyaffpage_url($vars){
        if(isset($vars['tyaffpage_url'])){
            $_SESSION['tyaffpage_url'] = $vars['tyaffpage_url'];
        }
    }
    // this method will be called before rendering "thanks" page
    function onThanksPage(Am_Event $event)
    {
        $controller = $event->getController(); // ThanksController instance
       
        if(isset($_SESSION['tyaffpage_url'])){
            // there was an tyaffpage_url in the signup form. Delete it from the session
            // and forward to the TY page (deleting prevents next purchase from forwarding again to same url)
            $controller->getResponse()->setRedirect($_SESSION['tyaffpage_url']);
            unset($_SESSION['tyaffpage_url']);       
        }

    }
}

and in brick.php there is:

PHP:

<?php

class Am_Form_Brick_TyAffUrl extends Am_Form_Brick
{
    protected $hideIfLoggedInPossible = self::HIDE_DONT;
    public function __construct($id = null, $config = null)
    {
        $this->name = ___('Thank Affiliate You Page (Hidden)');
        parent::__construct($id, $config);
    }
    public function initConfigForm(Am_Form $form)
    {
        $form->addText('tyaffpage_url')->setLabel(___('Affiliate Thank You Page URL'."\nUse this to forward user to a thank you page after signup success - ONLY FOR AFFILIATE PAGE"));
    }

    public function insertBrick(HTML_QuickForm2_Container $form)
    {
        $form->addHidden('tyaffpage_url')->setValue($this->getConfig('tyaffpage_url'));
    }

}
?>

what am i doing wrong?

thanks for the help

regards
Guido

I solved in this way:

I modified the file: application/aff/controllers/SignupController.php
(at the end of the method called 'process') adding these lines of code:

//$this->_redirect('aff/aff');
if(!$this->getDi()->config->get('ty_aff_page_url'))
$this->_redirect('aff/aff');
else
$this->_redirect($this->getDi()->config->get('ty_aff_page_url'));
return true;

and modified the file: /application/aff/library/SetupForms.php
(at the end of the method called 'initElements') adding this line of code:

$fs->addText('ty_aff_page_url')->setLabel(___('Thank You Page Url'));

regards
Guido