Handler.php

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<?php

declare(strict_types=1);

namespace ILIAS\MetaData\OERHarvester\RepositoryObjects;

class Handler implements HandlerInterface
{
    protected \ilTree $tree;

    public function __construct(\ilTree $tree)
    {
        $this->tree = $tree;
    }

    public function referenceObjectInTargetContainer(int $obj_id, int $container_ref_id): int
    {
        $object = \ilObjectFactory::getInstanceByObjId($obj_id);
        $new_ref_id = $object->createReference();

        $object->putInTree($container_ref_id);
        $object->setPermissions($container_ref_id);

        return $new_ref_id;
    }

    public function getObjectReferenceIDInContainer(int $obj_id, int $container_ref_id): ?int
    {
        $ref_ids = \ilObject::_getAllReferences($obj_id);
        foreach ($ref_ids as $ref_id) {
            if ($this->tree->isDeleted($ref_id)) {
                continue;
            }
            if ($this->tree->isGrandChild($container_ref_id, $ref_id)) {
                return $ref_id;
            }
        }
        return null;
    }

    public function isObjectDeleted(int $obj_id): bool
    {
        $exists = false;
        foreach (\ilObject::_getAllReferences($obj_id) as $ref_id => $tmp) {
            if (!$this->tree->isDeleted($ref_id)) {
                $exists = true;
            }
        }
        return !$exists;
    }

    public function deleteReference(int $ref_id): void
    {
        $object = \ilObjectFactory::getInstanceByRefId($ref_id);
        $object->delete();
    }

    public function getTypeOfReferencedObject(int $ref_id): string
    {
        return \ilObject::_lookupType($ref_id, true);
    }
}