Derivator.php

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<?php
 
declare(strict_types=1);
 
namespace ILIAS\MetaData\Services\Derivation;
 
use ILIAS\MetaData\Repository\RepositoryInterface;
use ILIAS\MetaData\Elements\SetInterface;
 
class Derivator implements DerivatorInterface
{
    protected SetInterface $from_set;
    protected RepositoryInterface $repository;
 
    public function __construct(
        SetInterface $from_set,
        RepositoryInterface $repository
    ) {
        $this->from_set = $from_set;
        $this->repository = $repository;
    }
 
    public function forObject(int $obj_id, int $sub_id, string $type): void
    {
        if ($sub_id === 0) {
            $sub_id = $obj_id;
        }
 
        try {
            $this->repository->transferMD(
                $this->from_set,
                $obj_id,
                $sub_id,
                $type,
                true
            );
        } catch (\ilMDRepositoryException $e) {
            throw new \ilMDServicesException(
                'Failed to derive LOM set: ' . $e->getMessage()
            );
        }
    }
}