Control to check if a customer order more than in stock

[jacksfregio]

Hi,

 

my website allow backorder, but I want to add (I think in Cartcontroller.php) a control to check if a customer order more than in stock of a product and warn it of the delay.

 

At this time, if someone write directly the product quantity in the box and click to Add to Cart button, no message appears, and order proceed. Only in the e-mail thereis notification about the delay.

 

I wrote this override, but it does not work:

class CartController extends CartControllerCore
{
    $warning_qty = 0;
    $prod_qty = StockAvailable::getQuantityAvailableByProduct($this->id_product);
    
    // Check product quantity availability
        if ( $prod_qty < $qty_to_check ) {
             $warning_qty =   Tools::displayErrors('There isn\'t enough product in stock.', !Tools::getValue('ajax'));
            
            }
        
        
                
}

Thanks for the help

Edited July 13, 2017 by jacksfregio (see edit history)