if ($history->addWithemail(true, $templateVars))
    Tools::redirectAdmin($currentIndex.'&id_order='.$id_order.'&vieworder'.'&token='.$this->token);
$this->_errors[] = Tools::displayError('An error occurred while changing the status or was unable to send e-mail to the customer.');

if ($history->addWithemail(true, $templateVars))
{
    if(isset($newOrderStatusId) && $newOrderStatusId == 7)
    {
        $products = $order->getProducts();
        foreach ($products as $k => $product)
        {
            $_POST['cancelQuantity'][$k] = $product['product_quantity'];
            $_POST['id_order_detail'][$k] = $k;
        }

        $_POST['cancelProduct'] = 1;
    }
}

elseif (Tools::isSubmit('cancelProduct') && Validate::isLoadedObject($order = new Order((int)Tools::getValue('id_order'))))

if (Tools::isSubmit('cancelProduct') && Validate::isLoadedObject($order = new Order((int)Tools::getValue('id_order'))))