StoreDocumentAllowNegationProductQuantityRule.php

<?php
 
namespace Bitrix\Catalog\Access\Rule;
 
use Bitrix\Catalog\Access\Model\StoreDocument;
use Bitrix\Catalog\Access\Permission\PermissionDictionary;
 
class StoreDocumentAllowNegationProductQuantityRule extends BaseRule
{
    public function check($params): bool
    {
        $item = $params['item'];
 
        if ($item instanceof StoreDocument)
        {
            $typesWithCheck = [
                StoreDocument::TYPE_DEDUCT,
                StoreDocument::TYPE_MOVING,
                StoreDocument::TYPE_SALES_ORDERS,
            ];
            if (in_array($item->getType(), $typesWithCheck, true))
            {
                $permission = PermissionDictionary::getStoreDocumentPermissionId(
                    PermissionDictionary::CATALOG_STORE_DOCUMENT_ALLOW_NEGATION_PRODUCT_QUANTITY,
                    $item->getType()
                );
 
                return $this->checkPermission($permission);
            }
 
            // for other types, allows to go into the negative.
            return true;
        }
 
        return false;
    }
 
    private function checkPermission(string $permission): bool
    {
        return $this->user->getPermission($permission) === 1;
    }
}