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
    {
        $value = 0;
        if ($wrapper->has($param)) {
            $value = $wrapper->retrieve(
                $param,
                $this->refinery->byTrying([
                    $this->refinery->kindlyTo()->int(),
                    $this->refinery->custom()->transformation(static function ($value): int {
                        if ($value === '') {
                            return 0;
                        }

                        return $value;
                    })
                ])
            );
        }

        return $value;
    }
}