ilForumRequestTrait.php

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<?php
 
declare(strict_types=1);
 
use ILIAS\HTTP\Wrapper\ArrayBasedRequestWrapper;
 
trait ilForumRequestTrait
{
    private function retrieveIntOrZeroFrom(ArrayBasedRequestWrapper $wrapper, string $param): int
    {
        if ($wrapper->has($param)) {
            return $wrapper->retrieve(
                $param,
                $this->refinery->byTrying([
                    $this->refinery->kindlyTo()->int(),
                    $this->refinery->custom()->transformation(
                        static fn($value): int => $value === '' ? 0 : $value
                    )
                ])
            );
        }
 
        return 0;
    }
}