How to bind an action after customer login success using Magento?

Question

I'm using Magento 1.4.1.1. After logout success, customer is rooted to "logout.phtml" first and "home page" later.

Is there anyway I could make Magento run couple of "php" codes after "login" success ?

Please don't hesitate to provide code samples as I'm new in Magento.

/var/www/app/etc/modules/Lpf_ModuleCookie.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Lpf_ModuleCookie>
            <active>true</active>
            <codePool>local</codePool>
        </Lpf_ModuleCookie>
    </modules>
</config>

/var/www/app/code/local/Lpf/ModuleCookie/etc/config.xml

<?xml version="1.0"?>
<config>
    <modules>
        <Lpf_ModuleCookie>
            <version>0.1</version>
        </Lpf_ModuleCookie>
    </modules>
    <events>
        <customer_login>
            <observers>
                <customer_login>
                    <type>model</type>
                    <class>ModuleCookie/observer</class>
                    <method>customerLogin</method>
                </customer_login>
            </observers>
        </customer_login>
    </events>
</config>

/var/www/app/code/local/Lpf/Observer.php

<?php
class Lpf_ModuleCookie_Model_Observer
{
     /**
      * Run couple of 'php' codes after customer logs in
      *
      * @param Varien_Event_Observer $observer
      */
     public function customerLogin($observer)
     {
         Mage::log(__METHOD__ . '() Hello!'); // Remove afterwards. Check your var/log/system.log to see if came to this point
         $customer = $observer->getCustomer();
         // "run couple of 'php' codes"
     }

}
?>

Answer 1

On the Mage_Customer_Model_Session model's method setCustomerAsLoggedIn() an event customer_login is being dispatched. I guess you need to hook in on that event. You could do this as follows.

Add the event to your module's config.xml file (app/code/local/Lpf/ModuleCookie/etc/config.xml):

<?xml version="1.0"?>
<config>
    <modules>
        <Lpf_ModuleCookie>
            <version>0.1</version>
        </Lpf_ModuleCookie>
    </modules>
    <global>
        <models>
            <lpf_modulecookie>
                <class>Lpf_ModuleCookie_Model</class>
            </lpf_modulecookie>
        </models>
    </global>
    <frontend>
        <events>
            <customer_login>
                <observers>
                    <lpf_modulecookie_customer_login>
                        <type>model</type>
                        <class>lpf_modulecookie/observer</class>
                        <method>customerLogin</method>
                    </lpf_modulecookie_customer_login>
                </observers>
            </customer_login>
        </events>
    </frontend>
</config>

Now create a model Lpf_ModuleCookie_Model_Observer (app/code/local/Lpf/ModuleCookie/Model/Observer.php). Add a customerLogin() method to the class:

class Lpf_ModuleCookie_Model_Observer
{

     /**
      * Run couple of 'php' codes after customer logs in
      *
      * @param Varien_Event_Observer $observer
      */
     public function customerLogin($observer)
     {
         Mage::log(__METHOD__ . '() Hello!'); // Remove afterwards. Check your var/log/system.log to see if came to this point
         $customer = $observer->getCustomer();
         // "run couple of 'php' codes"
     }

}

Answer 2

try

class Lpf_ModuleCookie_Model_Observer
{
    public function customerLogin()
    {
        return Mage::getSingleton('customer/session')->setBeforeAuthUrl(Mage::helper('checkout/cart')->getCartUrl());
    }
}