DomainService.php

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<?php

declare(strict_types=1);

namespace ILIAS\Wiki\Wiki;

use ILIAS\Wiki\InternalDomainService;
use ILIAS\Wiki\InternalRepoService;
use ILIAS\Wiki\InternalDataService;

class DomainService
{
    protected InternalDomainService $domain_service;
    protected InternalRepoService $repo_service;
    protected InternalDataService $data_service;

    public function __construct(
        InternalDataService $data_service,
        InternalRepoService $repo_service,
        InternalDomainService $domain_service
    ) {
        $this->repo_service = $repo_service;
        $this->data_service = $data_service;
        $this->domain_service = $domain_service;
    }

    public function checkRefId(int $ref_id): void
    {
        $obj_id = \ilObject::_lookupObjId($ref_id);
        if (\ilObject::_lookupType($obj_id) !== "wiki") {
            throw new \ilWikiException("Not a wiki ref id (" . $ref_id . ").");
        }
    }

    public function getObjId(int $ref_id): int
    {
        return \ilObject::_lookupObjId($ref_id);
    }

    public function object(
        int $ref_id
    ): \ilObjWiki {
        $this->checkRefId($ref_id);
        return new \ilObjWiki($ref_id);
    }

    public function translation(int $obj_id): \ilObjectTranslation
    {
        return \ilObjectTranslation::getInstance($obj_id);
    }

    public function getStartingPageId(int $wiki_ref_id): ?int
    {
        $pm = $this->domain_service->page()->page($wiki_ref_id);
        $wiki = $this->object($wiki_ref_id);
        $start_page = $wiki->getStartPage();
        if ($start_page === "") {
            return null;
        }
        return $pm->getPageIdForTitle($start_page);
    }

}