Avoid merging old cart items in customer session magento

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In this post we will see how to avoid merging old cart items to the current checkout session.

Scenario:

  • It will be happen when we login to store and adds some products into cart and leaves store without purchasing.
  • Then coming back to the store after sometime and adds some product into cart without login and proceeds to checkout.
  • In checkout page we will be requested to login, after login we can see some additional products are added into the cart which we are added in previous session.
  • In this case what we have to do is we need to clear old cart items( It was requested by one of my client ) and allow customers to show with the current session items.
Below i have given the codes used to clear old cart items. And also attached the file. File: app/etc/modules/Ws_Clearoldcartproducts.xml 
    
    
        
            
                true
                local
File: app/code/local/Ws/Clearoldcartproducts/etc/config.xml In below code we are using sales_quote_merge_before observer to clear old items. To know about observer go through this link. 
    
    
        
            
                1.0.0
            
        
        
            
                
                    
                        
                            singleton
                            Ws_Clearoldcartproducts_Model_Observer
                            loadCustomerQuote
File: app/code/local/Ws/Clearoldcartproducts/Model/Observer.php We have declared our observer class and action names in above xml file. Below code is where our magic works! 
    setStoreId(Mage::app()->getStore()->getId())
                    ->loadByCustomer(Mage::getSingleton('customer/session')->getCustomerId());

            if ($customerQuote->getId() &
            &
            $this->getQuoteId() != $customerQuote->getId()) {
                // Removing old cart items of the customer.
                foreach ($customerQuote->getAllItems() as $item) {
                    $item->isDeleted(true);
                    if ($item->getHasChildren()) {
                        foreach ($item->getChildren() as $child) {
                            $child->isDeleted(true);
                        }
                    }
                }
                $customerQuote->collectTotals()->save();
            } else {

                $this->getQuote()->getBillingAddress();
                $this->getQuote()->getShippingAddress();
                $this->getQuote()->setCustomer(Mage::getSingleton('customer/session')->getCustomer())
                        ->setTotalsCollectedFlag(false)
                        ->collectTotals()
                        ->save();
            }
            return $this;
        }

    }
    ?>
What we have done in above code is we have override the Mage_Checkout_Model_Session::loadCustomerQuote() action to avoid merging of old cart items!. Instead of merging the product we have deleted it! That's what we done! Please post your feedback's Thanks :)

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