Limit Product Quantity on cart base on Manufacturer

[gejrot]

I try to limit customer that can buy a product from certain manufacturer.

Example :

Product A from Manufacturer B

Product C from Manufacturer D

I want to limit that the customer can only buy 10 pcs product A and 5 pcs product C. I have been using this example code that provide in this  link

as follow and change the $id_product with $id_manufacturer and it's not working, any idea how to do this since i am new in prestashop,

any idea how to recall the id_manufacturer from product in cart.php ?

Quote

if ((int)$quantity <= 0)

  return $this->deleteProduct($id_product, $id_product_attribute, (int)$id_customization);

elseif (!$product->available_for_order || Configuration::get('PS_CATALOG_MODE'))

  return false;

elseif ($quantity > 4 && $id_product =='XXX') { // Where XXX is the product id. For example, 4 max per same product/product-combination allowed

  return false;

}

else

{

  /* Check if the product is already in the cart */

  $result = $this->containsProduct($id_product, $id_product_attribute, (int)$id_customization,

      (int)$id_address_delivery);

 

  /* Update quantity if product already exist */

  if ($result)

  {

    if ($operator == 'up')

    {

      $sql = 'SELECT stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity

          FROM '._DB_PREFIX_.'product p

          '.Product::sqlStock('p', $id_product_attribute, true, $shop).'

          WHERE p.id_product = '.$id_product;

 

      $result2 = Db::getInstance()->getRow($sql);

      $product_qty = (int)$result2['quantity'];

      // Quantity for product pack

      if (Pack::isPack($id_product))

        $product_qty = Pack::getQuantity($id_product, $id_product_attribute);

      $new_qty = (int)$result['quantity'] + (int)$quantity;

      if ($new_qty > 4 && $id_product =='XXX') { // Where XXX is the product id. For example, 4 max per same product/product-combination allowed

        return false;

      }

Any suggestion would help me to understand the code. really appreciate it. Thanks