In order to keep the code clear in the module's main class, we will create a controller for shipping cost calculation:
public function getOrderShippingCost($params, $shipping_cost)
{
$controller = $this->getHookController('getOrderShippingCost');
return $controller->run($params, $shipping_cost);
}As you can see, we've passed the two parameters available in the method to the controller. The two parameters are:
$params: In this case (thegetOrderShippingCostfunction),$paramsis in fact theCartobject$shipping_cost: This parameter corresponds to the shipping cost calculated by PrestaShop, which is the addition of the shipping handling fee (if theshipping_handlingparameter of the carrier has been set totrue, which is the case) and the price range / weight range cost (if theneed_rangeparameter has been set totrue, which is the case too)