class.ilContainerReferenceAccess.php

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<?php

declare(strict_types=1);

class ilContainerReferenceAccess extends ilObjectAccess
{
    public static function _isAccessible(int $a_ref_id): bool
    {
        global $DIC;

        $ilDB = $DIC->database();
        $tree = $DIC->repositoryTree();
        $access = $DIC->access();

        $obj_id = ilObject::_lookupObjId($a_ref_id);
        $query = "SELECT target_obj_id FROM container_reference " .
            "WHERE obj_id = " . $ilDB->quote($obj_id, 'integer') . " ";
        $res = $ilDB->query($query);
        $target_id = 0;
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $target_id = (int) $row->target_obj_id;
        }
        $target_ref_ids = ilObject::_getAllReferences($target_id);
        $target_ref_id = current($target_ref_ids);
        return
            !$tree->isDeleted($target_ref_id) &&
            $access->checkAccess('read', '', $target_ref_id);
    }
}