wikimedia/mediawiki-extensions-Wikibase

<?php declare( strict_types=1 );

namespace Wikibase\Repo\RestApi\Application\UseCases\GetSitelink;

use Wikibase\Repo\RestApi\Application\UseCases\GetLatestItemRevisionMetadata;
use Wikibase\Repo\RestApi\Application\UseCases\ItemRedirect;
use Wikibase\Repo\RestApi\Application\UseCases\UseCaseError;
use Wikibase\Repo\RestApi\Domain\Services\SitelinkRetriever;

/**
 * @license GPL-2.0-or-later
 */
class GetSitelink {

    private GetSitelinkValidator $validator;
    private GetLatestItemRevisionMetadata $getRevisionMetadata;
    private SitelinkRetriever $sitelinkRetriever;

    public function __construct(
        GetSitelinkValidator $validator,
        GetLatestItemRevisionMetadata $getRevisionMetadata,
        SitelinkRetriever $sitelinkRetriever
    ) {
        $this->validator = $validator;
        $this->getRevisionMetadata = $getRevisionMetadata;
        $this->sitelinkRetriever = $sitelinkRetriever;
    }

    /**
     * @throws UseCaseError
     * @throws ItemRedirect
     */
    public function execute( GetSitelinkRequest $request ): GetSitelinkResponse {
        $deserializedRequest = $this->validator->validateAndDeserialize( $request );
        $itemId = $deserializedRequest->getItemId();
        $siteId = $deserializedRequest->getSiteId();

        [ $revisionId, $lastModified ] = $this->getRevisionMetadata->execute( $itemId );

        $sitelink = $this->sitelinkRetriever->getSitelink( $itemId, $siteId );
        if ( !$sitelink ) {
            throw UseCaseError::newResourceNotFound( 'sitelink' );
        }

        return new GetSitelinkResponse( $sitelink, $lastModified, $revisionId );
    }
}