Retrieve the category id present in the cart.

[JoJo!]

Hello,
In order to put a condition on the "add to cart" button which will say: If the products of category 3 are in the cart, the "Add to cart" button will be unavailable on products from other categories.

For that, I would like to retrieve the id of the product categories present in the cart

I have something that looks like it but just for the products already in the basket:

{$ in_cart = 0}
{foreach from = $ cart ['products'] item = 'cart_product'}
   {if $ cart_product ['id_product'] == $ product.id}
     {$ in_cart = 1}
   {/ if}
{/ foreach}

{if $ in_cart}
   {l s = 'Already in cart' d = 'Shop.Theme.Actions'}
{else}
   {l s = 'Add to cart' d = 'Shop.Theme.Actions'}
{/ if}

thank you so much
Jonathan