Add product to cart outside of magento (external script)

Question

I have to add a product through an external page into the cart under the same URL.

The difference between these pages is that eg test.de is running TYPO3 and test.de/Shop is running Magento and test.de/productpage is running an external script through TYPO3.

From the product page, I have to add a product to the Magento cart to proceed the checkout.

The key problem is to start the session outside of Magento. If I call test.de/Shop/checkout/cart before I go to test.de/productpage and add a product to the cart, it works flawlessly. But if I go the normal way (site -> productpage -> cart) I cant get Magento to listen to the session on the product page.

I have something like this to call

function addToBasket()
    {

        require_once('../app/Mage.php');
        ob_start();
        session_start();
        umask(0);
        session_write_close();
        Mage::app()->setCurrentStore(33);

        $session = Mage::getSingleton('core/session', array('name'=>'frontend'));   

        $productId = !isset($_GET['activeProdId']) ? '' : $_GET['activeProdId'];
        $qty = !isset($_GET['qty']) ? '1' : $_GET['qty'];

        if(empty($productId)) {
            return "no product-id found";
        }

        $request = Mage::app()->getRequest();

        $product = Mage::getModel('catalog/product')->load($productId);

        $cart = Mage::helper('checkout/cart')->getCart();

        $cart->addProduct($product, array('qty' => $qty));

        $session->setLastAddedProductId($product->getId());
        $session->setCartWasUpdated(true);

        $cart->save();

        return true;

   }

The addToBasket is called through ajax.

So the question is: How do I start the session outside of the Magento-scope and put products into the cart?

Answer 1

once you include Mage.php you will need to initialize Magento with

Mage::app("default");

(first param is store code)

after that...

Mage::getSingleton('core/session', array('name'=>'frontend'));

...will work as it should.

Answer 2

Add first (like @samsonovits suggested) I had to add the store code in mage app and the store id (didn't test if the store-id is necessary after adding the store code).

Mage::app("default")->setCurrentStore(33);

Afterwards I called the frontend on Mage::app

Mage::app()->loadArea('frontend');

I switched the Mage::helper('checkout/cart') to the singleton Mage::getSingleton('checkout/cart') .

Since Magento 1.8 we have to add a form_key to add products through an external script.

This was accomplished by the following code:

$param = array('product' => $productId,
                   'qty' => $qty,
                   'form_key' => Mage::getSingleton('core/session')->getFormKey());      

$request = new Varien_Object();
$request->setData($param);

Now we could proceed with a $cart->addProduct($product, $request) and $cart->save() to save the cart.

There is one more important part to change (since the external script is not in the same scope like magento) - the cookie url and path.

System -> Configuration -> Web -> Cookies

There we have to customize two fields:

Cookie-Path: /Shop (where /Shop is the destination of magento)

Cookie-Domain: .test.de (where .test.de is the URL of the project)

After this the /Shop/checkout/cart was able to inherit the frontend-Cookie of the external script ( productpage )

NOTE: Without changing the Cookie-Path & Cookie-Domain Magento will create two frontend cookies with different content.

Full code:

function addToBasket()
{

    require_once('path/to/Mage.php');
    umask(0);
    Mage::app("default")->setCurrentStore(33);
    umask(0);
    Mage::app()->loadArea('frontend');
    $productId = !isset($_GET['activeProdId']) ? '' : $_GET['activeProdId'];
    $qty = !isset($_GET['qty']) ? '1' : $_GET['qty'];
    Mage::getSingleton("core/session", array("name" => "frontend"));
    $session = Mage::getSingleton("customer/session");
    $cart = Mage::getSingleton('checkout/cart')->setStoreId(33);

    $cart->init();

    $paramater = array('product' => $productId,
                        'qty' => $qty,
                        'form_key' => Mage::getSingleton('core/session')->getFormKey()
                );       

    $request = new Varien_Object();
    $request->setData($paramater);


    if(empty($productId)) {
        return "no product-id found";
    }

    $product = Mage::getModel('catalog/product')->load($productId);

    $cart->addProduct($product, $request);

    $session->setLastAddedProductId($product->getId());
    $session->setCartWasUpdated(true);

    $cart->save();
    return 1;
}