Friday, June 19, 2015

Magento Load Quote Generated By API on Frontend


Recently in one of my project we were using magento to implement checkout process for third party website. Basically we were using Magento APIs to create quote. Now for the paypal payment we were redirecting users to magento url and start checkout process by redirecting them to paypal and on successful payment redirect back to magento site, place and order and redirect them back to their site. Now the problem is when we redirect user to magento site to start checkout process there is no customer or checkout session hence checkout can not be started as shopping cart was empty. In this blog I am going to explain how to load quote generated by API on frontend and start checkout process.

First of all let me explain why we have to this changes. Magento has its own session management on front end. It will not load cart of there is no checkout session found on front end. So we have to store everything in frontend session so magento can remember it.

First of all you have to pass three params when user is redirecting to magento site. Following are three params required.


As on front end we have to set specific store and create customer session with customer_id and load shopping cart. I was using following URL for redirection.


As you can see above we are directly starting checkout process and redirecting user to paypal. But before that we have to set store and generate customer session and load quote. So lets go step by step. First of all open following file.


and find following function.

     * Init Front Controller
     * @return Mage_Core_Controller_Varien_Front
    public function init()

This function is called first for any magento URL request. So here are going to do some initialization steps.

First let's set up the store for which quote id was generated. Add following code to start of init function.

$storeId = '';
//////////////////////////////////////Setting up store id///////////////////////////
        $storeId = $_REQUEST['store_id'];

if( Mage::getSingleton('core/session')->getStoreId()){
$storeId = Mage::getSingleton('core/session')->getStoreId();
case "1" : Mage::app()->setCurrentStore('store1');break;
case "2" : Mage::app()->setCurrentStore('store2');break;
default: Mage::app()->setCurrentStore('store1');break;

First we are checking if there is store id in request then first we are storing it to magento core session. Later we are getting it from session and storing respective store. Please note this is required if you have multiple stores, else you can avoid this. In my case there were multiple stores. 

Now next step is to create customer session. Add following code after above code.

////////////////////////////////////////Setting up customer id////////////////////////
if( Mage::getSingleton('core/session')->getCustomerId()){

Now next step is to store quote id in session so it can be used later.

/////////////////////////////////////////Saving Quote Id//////////////////////////////

Now open following file.


And check following function.

     * Get checkout quote instance by current session
     * @return Mage_Sales_Model_Quote
    public function getQuote()

Add below code to the function after following line.

Mage::dispatchEvent('custom_quote_process', array('checkout_session' => $this));

//////////////////////////////////////////Returning quote stored in session////////////////////////
    $this->_quote = Mage::getModel('sales/quote')->setStore(Mage::app()->getStore())->load(Mage::getSingleton('core/session')->getQuoteId());
return $this->_quote;

That's it and now you can start checkout process with this quote. Hope this helps you. 

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