/**
* @category ISO_HOOKS: addProductToCollection
*
* @param Product|\Model $product
* @param int $quantity
* @param ProductCollection $collection
*
* @return int
*/
public function checkBeforeAddToCollection(Product $product, $quantity, ProductCollection $collection)
{
/** @var ProductType|\Model $productType */
$productType = $product->getRelated('type');
if (!$productType->stockmanagement_active) {
return $quantity;
}
$stock = Stock::getStockForProduct($product->id);
$quantityInCart = 0;
foreach ($collection->getItems() as $item) {
if ($item->product_id === $product->id) {
$quantityInCart += $item->quantity;
}
}
if (false === $stock) {
return $quantity;
} elseif (0 === $stock) {
Message::addError($GLOBALS['TL_LANG']['MSC']['simpleStockmanagement']['productUnavailable']);
return 0;
} elseif ($quantity + $quantityInCart > $stock) {
Message::addInfo($GLOBALS['TL_LANG']['MSC']['simpleStockmanagement']['maxQuantityAdded']);
return $stock - $quantityInCart;
}
return $quantity;
}