Clear cart before a certain product is added

-- HikaShop version -- : current
-- Joomla version -- : current 3.3
-- PHP version -- : current

hi!

I would like to create a plugin that does something when a product is added to the cart:

- It should check whether the product is part of a certain category. If this is the case, the plugin should empty the cart and then add the product to the cart, making it the only product in the cart

- If a certain product is added to the cart, it should change the shop's currency

Right now, I am working on the first part, but I do not even manage to make the cart get cleared for every product added. What I tried is this:

function onBeforeCartUpdate(&$cartClass,&$cart,$product_id,$quantity,$add,$type,$resetCartWhenUpdate,$force,&$do)
	{
 		if (($type=='product') && ($add=1)) $cartClass->resetCart();
 		$do=true;
		return true;
	}

Hi!

Thank you, it kinda works! Only problem is, if I add the same product twice, it just says "The cart is empty" - do you have any idea what could be the problem here?

Cheers!

I am kinda stuck, do you have any other ideas how it could be possible to clean the cart in the onBeforeCartUpdate function?

thanks!!

Hi,

If it's working fine but when you add the same item, why not simply add a check in order to get the cart content, check the product to add, and if it's the same just set $do to false.

thanks, very good idea, that makes it work ALMOST all the time.

sometimes, and I have no idea when (no pattern recognizable), it just says "the cart is empty".

is there any other way to delete all items from the cart without calling resetCart()?


thanks once again!

just for others if you have a similar problem - I did it this way (it also changes the currency if certain products are added):

function onBeforeCartUpdate(&$cartClass,&$cart,$product_id,$quantity,$add,$type,$resetCartWhenUpdate,$force,&$do)
{
$app=&JFactory::getApplication();
$pointProducts=array(4,5,6,7);
if (in_array($product_id,$pointProducts)) {
$app->setUserState( 'com_hikashop.currency_id',1);
} else
{
$app->setUserState( 'com_hikashop.currency_id',182);
}
$full = $cartClass->loadFullCart(true,true,true);
$rows = $full->products;
$first=array_shift(array_values($rows));
if ($first->product_id==$product_id)
{
$do=false;
return false;
} else
{
$cartClass->resetCart(false);
$cart=$cartClass->initCart();
$do=true;
return true;
}
}