как переопределить подписчик модели рассылки magento 1.9. Переполнение стека

Я пытаюсь добавить имя и фамилию в подписку на рассылку. Я хотел бы переопределить основные функции информационного бюллетеня, контроллер и модель подписчика.
Вот мой код:
config.xml

<?xml version="1.0" encoding="UTF-8"?>
<config>
<modules>
<My_Newsletter>
<version>0.1.0</version>
</My_Newsletter>
</modules>
<global>
<models>
<newsletter>
<rewrite>
<subscriber>My_Newsletter_Model_Newsletter_Subscriber</subscriber>
</rewrite>
</newsletter>
</models>
</global>
<frontend>
<routers>
<newsletter>
<args>
<modules>
<My_Newsletter before="Mage_Newsletter_SubscriberController">My_Newsletter</My_Newsletter>
</modules>
</args>
</newsletter>
</routers>
</frontend>
</config>

controller.php

<?php
include_once("Mage/Newsletter/controllers/SubscriberController.php");
class My_Newsletter_SubscriberController extends Mage_Newsletter_SubscriberController {
public function newAction()
{
if ($this->getRequest()->isPost() && $this->getRequest()->getPost('email')) {
$session            = Mage::getSingleton('core/session');
$customerSession    = Mage::getSingleton('customer/session');
$email              = (string) $this->getRequest()->getPost('email');
$firtname = (string) $this->getRequest()->getPost('firstname');
$lastname = (string) $this->getRequest()->getPost('lastname');

try {
if (!Zend_Validate::is($email, 'EmailAddress')) {
Mage::throwException($this->__('Please enter a valid email address.'));
}

if (Mage::getStoreConfig(Mage_Newsletter_Model_Subscriber::XML_PATH_ALLOW_GUEST_SUBSCRIBE_FLAG) != 1 &&
!$customerSession->isLoggedIn()) {
Mage::throwException($this->__('Sorry, but administrator denied subscription for guests. Please <a href="%s">register</a>.', Mage::helper('customer')->getRegisterUrl()));
}

$ownerId = Mage::getModel('customer/customer')
->setWebsiteId(Mage::app()->getStore()->getWebsiteId())
->loadByEmail($email)
->getId();
if ($ownerId !== null && $ownerId != $customerSession->getId()) {
Mage::throwException($this->__('This email address is already assigned to another user.'));
}

$status = Mage::getModel('newsletter/subscriber')->subscribe($email,$firtname,$lastname);
if ($status == Mage_Newsletter_Model_Subscriber::STATUS_NOT_ACTIVE) {
$session->addSuccess($this->__('Confirmation request has been sent.'));
}
else {
$session->addSuccess($this->__('Thank you for your subscription.'));
}
}
catch (Mage_Core_Exception $e) {
$session->addException($e, $this->__('There was a problem with the subscription: %s', $e->getMessage()));
}
catch (Exception $e) {
$session->addException($e, $this->__('There was a problem with the subscription.'));
}
}
$this->_redirectReferer();
}
}

subscriber.php

<?php
include_once("Mage/Newsletter/Model/Subscriber.php");
class My_Newsletter_Model_Subscriber extends Mage_Core_Model_Abstract {
const STATUS_SUBSCRIBED     = 1;
const STATUS_NOT_ACTIVE     = 2;
const STATUS_UNSUBSCRIBED   = 3;
const STATUS_UNCONFIRMED    = 4;

const XML_PATH_CONFIRM_EMAIL_TEMPLATE       = 'newsletter/subscription/confirm_email_template';
const XML_PATH_CONFIRM_EMAIL_IDENTITY       = 'newsletter/subscription/confirm_email_identity';
const XML_PATH_SUCCESS_EMAIL_TEMPLATE       = 'newsletter/subscription/success_email_template';
const XML_PATH_SUCCESS_EMAIL_IDENTITY       = 'newsletter/subscription/success_email_identity';
const XML_PATH_UNSUBSCRIBE_EMAIL_TEMPLATE   = 'newsletter/subscription/un_email_template';
const XML_PATH_UNSUBSCRIBE_EMAIL_IDENTITY   = 'newsletter/subscription/un_email_identity';
const XML_PATH_CONFIRMATION_FLAG            = 'newsletter/subscription/confirm';
const XML_PATH_ALLOW_GUEST_SUBSCRIBE_FLAG   = 'newsletter/subscription/allow_guest_subscribe';

/**
* @deprecated since 1.4.0.1
*/
const XML_PATH_SENDING_SET_RETURN_PATH      = Mage_Core_Model_Email_Template::XML_PATH_SENDING_SET_RETURN_PATH;

/**
* Prefix of model events names
*
* @var string
*/
protected $_eventPrefix = 'newsletter_subscriber';

/**
* Parameter name in event
*
* In observe method you can use $observer->getEvent()->getObject() in this case
*
* @var string
*/
protected $_eventObject = 'subscriber';

/**
* True if data changed
*
* @var bool
*/
protected $_isStatusChanged = false;

/**
* Initialize resource model
*/
protected function _construct()
{
$this->_init('newsletter/subscriber');
}

/**
* Alias for getSubscriberId()
*
* @return int
*/
public function getId()
{
return $this->getSubscriberId();
}

/**
* Alias for setSubscriberId()
*
* @param int $value
*/
public function setId($value)
{
return $this->setSubscriberId($value);
}

/**
* Alias for getSubscriberConfirmCode()
*
* @return string
*/
public function getCode()
{
return $this->getSubscriberConfirmCode();
}

/**
* Return link for confirmation of subscription
*
* @return string
*/
public function getConfirmationLink() {
return Mage::helper('newsletter')->getConfirmationUrl($this);
}

/**
* Returns Insubscribe url
*
* @return string
*/
public function getUnsubscriptionLink() {
return Mage::helper('newsletter')->getUnsubscribeUrl($this);
}

/**
* Alias for setSubscriberConfirmCode()
*
* @param string $value
*/
public function setCode($value)
{
return $this->setSubscriberConfirmCode($value);
}

/**
* Alias for getSubscriberStatus()
*
* @return int
*/
public function getStatus()
{
return $this->getSubscriberStatus();
}

/**
* Alias for setSubscriberStatus()
*
* @param int
*/
public function setStatus($value)
{
return $this->setSubscriberStatus($value);
}

/**
* Set the error messages scope for subscription
*
* @param boolean $scope
* @return Mage_Newsletter_Model_Subscriber
*/

public function setMessagesScope($scope)
{
$this->getResource()->setMessagesScope($scope);
return $this;
}

/**
* Alias for getSubscriberEmail()
*
* @return string
*/
public function getEmail()
{
return $this->getSubscriberEmail();
}

/**
* Alias for setSubscriberEmail()
*
* @param string $value
*/
public function setEmail($value)
{
return $this->setSubscriberEmail($value);
}

/**
* Set for status change flag
*
* @param boolean $value
*/
public function setIsStatusChanged($value)
{
$this->_isStatusChanged = (boolean) $value;
return $this;
}

/**
* Return status change flag value
*
* @return boolean
*/
public function getIsStatusChanged()
{
return $this->_isStatusChanged;
}

/**
* Return customer subscription status
*
* @return bool
*/
public function isSubscribed()
{
if($this->getId() && $this->getStatus()==self::STATUS_SUBSCRIBED) {
return true;
}

return false;
}


/**
* Load subscriber data from resource model by email
*
* @param int $subscriberId
*/
public function loadByEmail($subscriberEmail)
{
$this->addData($this->getResource()->loadByEmail($subscriberEmail));
return $this;
}

/**
* Load subscriber info by customer
*
* @param Mage_Customer_Model_Customer $customer
* @return Mage_Newsletter_Model_Subscriber
*/
public function loadByCustomer(Mage_Customer_Model_Customer $customer)
{
$data = $this->getResource()->loadByCustomer($customer);
$this->addData($data);
if (!empty($data) && $customer->getId() && !$this->getCustomerId()) {
$this->setCustomerId($customer->getId());
$this->setSubscriberConfirmCode($this->randomSequence());
if ($this->getStatus()==self::STATUS_NOT_ACTIVE) {
$this->setStatus($customer->getIsSubscribed() ? self::STATUS_SUBSCRIBED : self::STATUS_UNSUBSCRIBED);
}
$this->save();
}
return $this;
}

/**
* Returns sting of random chars
*
* @param int $length
* @return string
*/
public function randomSequence($length=32)
{
$id = '';
$par = array();
$char = array_merge(range('a','z'),range(0,9));
$charLen = count($char)-1;
for ($i=0;$i<$length;$i++){
$disc = mt_rand(0, $charLen);
$par[$i] = $char[$disc];
$id = $id.$char[$disc];
}
return $id;
}

/**
* Subscribes by email
*
* @param string $email
* @throws Exception
* @return int
*/
public function subscribe($email,$firstname,$lastname)
{
$this->loadByEmail($email);
$customerSession = Mage::getSingleton('customer/session');

if(!$this->getId()) {
$this->setSubscriberConfirmCode($this->randomSequence());
}

$isConfirmNeed   = (Mage::getStoreConfig(self::XML_PATH_CONFIRMATION_FLAG) == 1) ? true : false;
$isOwnSubscribes = false;
$ownerId = Mage::getModel('customer/customer')
->setWebsiteId(Mage::app()->getStore()->getWebsiteId())
->loadByEmail($email)
->getId();
$isSubscribeOwnEmail = $customerSession->isLoggedIn() && $ownerId == $customerSession->getId();

if (!$this->getId() || $this->getStatus() == self::STATUS_UNSUBSCRIBED
|| $this->getStatus() == self::STATUS_NOT_ACTIVE
) {
if ($isConfirmNeed === true) {
// if user subscribes own login email - confirmation is not needed
$isOwnSubscribes = $isSubscribeOwnEmail;
if ($isOwnSubscribes == true){
$this->setStatus(self::STATUS_SUBSCRIBED);
} else {
$this->setStatus(self::STATUS_NOT_ACTIVE);
}
} else {
$this->setStatus(self::STATUS_SUBSCRIBED);
}
$this->setSubscriberEmail($email);
$this->setSubscriberFirstname($firstname);
$this->setSubscriberLastname($lastname);
}

if ($isSubscribeOwnEmail) {
$this->setStoreId($customerSession->getCustomer()->getStoreId());
$this->setCustomerId($customerSession->getCustomerId());
} else {
$this->setStoreId(Mage::app()->getStore()->getId());
$this->setCustomerId(0);
}

$this->setIsStatusChanged(true);

try {
$this->save();
if ($isConfirmNeed === true
&& $isOwnSubscribes === false
) {
$this->sendConfirmationRequestEmail();
} else {
$this->sendConfirmationSuccessEmail();
}

return $this->getStatus();
} catch (Exception $e) {
throw new Exception($e->getMessage());
}
}

/**
* Unsubscribes loaded subscription
*
*/
public function unsubscribe()
{
if ($this->hasCheckCode() && $this->getCode() != $this->getCheckCode()) {
Mage::throwException(Mage::helper('newsletter')->__('Invalid subscription confirmation code.'));
}

$this->setSubscriberStatus(self::STATUS_UNSUBSCRIBED)
->save();
$this->sendUnsubscriptionEmail();
return $this;
}

/**
* Saving customer subscription status
*
* @param   Mage_Customer_Model_Customer $customer
* @return  Mage_Newsletter_Model_Subscriber
*/
public function subscribeCustomer($customer)
{
$this->loadByCustomer($customer);

if ($customer->getImportMode()) {
$this->setImportMode(true);
}

if (!$customer->getIsSubscribed() && !$this->getId()) {
// If subscription flag not set or customer is not a subscriber
// and no subscribe below
return $this;
}

if(!$this->getId()) {
$this->setSubscriberConfirmCode($this->randomSequence());
}

/*
* Logical mismatch between customer registration confirmation code and customer password confirmation
*/
$confirmation = null;
if ($customer->isConfirmationRequired() && ($customer->getConfirmation() != $customer->getPassword())) {
$confirmation = $customer->getConfirmation();
}

$sendInformationEmail = false;
if ($customer->hasIsSubscribed()) {
$status = $customer->getIsSubscribed()
? (!is_null($confirmation) ? self::STATUS_UNCONFIRMED : self::STATUS_SUBSCRIBED)
: self::STATUS_UNSUBSCRIBED;
/**
* If subscription status has been changed then send email to the customer
*/
if ($status != self::STATUS_UNCONFIRMED && $status != $this->getStatus()) {
$sendInformationEmail = true;
}
} elseif (($this->getStatus() == self::STATUS_UNCONFIRMED) && (is_null($confirmation))) {
$status = self::STATUS_SUBSCRIBED;
$sendInformationEmail = true;
} else {
$status = ($this->getStatus() == self::STATUS_NOT_ACTIVE ? self::STATUS_UNSUBSCRIBED : $this->getStatus());
}

if($status != $this->getStatus()) {
$this->setIsStatusChanged(true);
}

$this->setStatus($status);

if(!$this->getId()) {
$storeId = $customer->getStoreId();
if ($customer->getStoreId() == 0) {
$storeId = Mage::app()->getWebsite($customer->getWebsiteId())->getDefaultStore()->getId();
}
$this->setStoreId($storeId)
->setCustomerId($customer->getId())
->setEmail($customer->getEmail());
} else {
$this->setStoreId($customer->getStoreId())
->setEmail($customer->getEmail());
}

$this->save();
$sendSubscription = $customer->getData('sendSubscription') || $sendInformationEmail;
if (is_null($sendSubscription) xor $sendSubscription) {
if ($this->getIsStatusChanged() && $status == self::STATUS_UNSUBSCRIBED) {
$this->sendUnsubscriptionEmail();
} elseif ($this->getIsStatusChanged() && $status == self::STATUS_SUBSCRIBED) {
$this->sendConfirmationSuccessEmail();
}
}
return $this;
}

/**
* Confirms subscriber newsletter
*
* @param string $code
* @return boolean
*/
public function confirm($code)
{
if($this->getCode()==$code) {
$this->setStatus(self::STATUS_SUBSCRIBED)
->setIsStatusChanged(true)
->save();
return true;
}

return false;
}

/**
* Mark receiving subscriber of queue newsletter
*
* @param  Mage_Newsletter_Model_Queue $queue
* @return boolean
*/
public function received(Mage_Newsletter_Model_ $queue)
{
$this->getResource()->received($this,$queue);
return $this;
}

/**
* Sends out confirmation email
*
* @return Mage_Newsletter_Model_Subscriber
*/
public function sendConfirmationRequestEmail()
{
if ($this->getImportMode()) {
return $this;
}

if(!Mage::getStoreConfig(self::XML_PATH_CONFIRM_EMAIL_TEMPLATE)
|| !Mage::getStoreConfig(self::XML_PATH_CONFIRM_EMAIL_IDENTITY)
)  {
return $this;
}

$translate = Mage::getSingleton('core/translate');
/* @var $translate Mage_Core_Model_Translate */
$translate->setTranslateInline(false);

$email = Mage::getModel('core/email_template');

// $email->sendTransactional(
//     Mage::getStoreConfig(self::XML_PATH_CONFIRM_EMAIL_TEMPLATE),
//     Mage::getStoreConfig(self::XML_PATH_CONFIRM_EMAIL_IDENTITY),
//     $this->getEmail(),
//     $this->getName(),
//     array('subscriber'=>$this)
// );

$email->sendTransactional(
Mage::getStoreConfig(self::XML_PATH_SUCCESS_EMAIL_TEMPLATE),
Mage::getStoreConfig(self::XML_PATH_SUCCESS_EMAIL_IDENTITY),
$this->getEmail(),
$this->getName(),
array('subscriber'=>$this, 'unsubscribe' =>$this->getUnsubscriptionLink())
);

$translate->setTranslateInline(true);

return $this;
}

/**
* Sends out confirmation success email
*
* @return Mage_Newsletter_Model_Subscriber
*/
public function sendConfirmationSuccessEmail()
{
if ($this->getImportMode()) {
return $this;
}

if(!Mage::getStoreConfig(self::XML_PATH_SUCCESS_EMAIL_TEMPLATE)
|| !Mage::getStoreConfig(self::XML_PATH_SUCCESS_EMAIL_IDENTITY)
) {
return $this;
}

$translate = Mage::getSingleton('core/translate');
/* @var $translate Mage_Core_Model_Translate */
$translate->setTranslateInline(false);

$email = Mage::getModel('core/email_template');

$email->sendTransactional(
Mage::getStoreConfig(self::XML_PATH_SUCCESS_EMAIL_TEMPLATE),
Mage::getStoreConfig(self::XML_PATH_SUCCESS_EMAIL_IDENTITY),
$this->getEmail(),
$this->getName(),
array('subscriber'=>$this)
);

$translate->setTranslateInline(true);

return $this;
}

/**
* Sends out unsubsciption email
*
* @return Mage_Newsletter_Model_Subscriber
*/
public function sendUnsubscriptionEmail()
{
if ($this->getImportMode()) {
return $this;
}
if(!Mage::getStoreConfig(self::XML_PATH_UNSUBSCRIBE_EMAIL_TEMPLATE)
|| !Mage::getStoreConfig(self::XML_PATH_UNSUBSCRIBE_EMAIL_IDENTITY)
) {
return $this;
}

$translate = Mage::getSingleton('core/translate');
/* @var $translate Mage_Core_Model_Translate */
$translate->setTranslateInline(false);

$email = Mage::getModel('core/email_template');

$email->sendTransactional(
Mage::getStoreConfig(self::XML_PATH_UNSUBSCRIBE_EMAIL_TEMPLATE),
Mage::getStoreConfig(self::XML_PATH_UNSUBSCRIBE_EMAIL_IDENTITY),
$this->getEmail(),
$this->getName(),
array('subscriber'=>$this)
);

$translate->setTranslateInline(true);

return $this;
}

/**
* Retrieve Subscribers Full Name if it was set
*
* @return string|null
*/
public function getSubscriberFullName()
{
$name = null;
if ($this->hasCustomerFirstname() || $this->hasCustomerLastname()) {
$name = Mage::helper('customer')->getFullCustomerName($this);
}
return $name;
}
/**
* Alias for getSubscriberFirstname()
*
* @return string
*/
public function getFirstname()
{
return $this->getSubscriberFirstname();
}

/**
* Alias for setSubscriberFirstName()
*
* @param string $value
*/
public function setFirstname($value)
{
return $this->setSubscriberFirstname($value);
}

/**
* Alias for getSubscriberLastname()
*
* @return string
*/
public function getLastname()
{
return $this->getSubscriberLastname();
}

/**
* Alias for setSubscriberLastname()
*
* @param string $value
*/
public function setLastname($value)
{
return $this->setSubscriberLastname($value);
}
}

Я добавляю геттер и сеттер в модель подписчика, добавляю $ firstname, $ lastname в функцию подписки
проблема в том, что при отправке страница больше не загружается и список администраторов не отображается.

Я подозреваю, что у меня есть проблема в config.xml при переопределении модели subscriber.php