wikimedia/mediawiki-extensions-Wikibase

<?php declare( strict_types = 1 );

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

use Wikibase\Repo\RestApi\Application\UseCases\GetLatestPropertyRevisionMetadata;
use Wikibase\Repo\RestApi\Application\UseCases\UseCaseError;
use Wikibase\Repo\RestApi\Domain\Services\PropertyLabelWithFallbackRetriever;

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

    private PropertyLabelWithFallbackRetriever $labelRetriever;
    private GetLatestPropertyRevisionMetadata $getRevisionMetadata;
    private GetPropertyLabelWithFallbackValidator $validator;

    public function __construct(
        GetPropertyLabelWithFallbackValidator $validator,
        GetLatestPropertyRevisionMetadata $getRevisionMetadata,
        PropertyLabelWithFallbackRetriever $labelRetriever
    ) {
        $this->labelRetriever = $labelRetriever;
        $this->getRevisionMetadata = $getRevisionMetadata;
        $this->validator = $validator;
    }

    /**
     * @throws UseCaseError
     */
    public function execute( GetPropertyLabelWithFallbackRequest $request ): GetPropertyLabelWithFallbackResponse {
        $deserializedRequest = $this->validator->validateAndDeserialize( $request );
        $propertyId = $deserializedRequest->getPropertyId();
        $languageCode = $deserializedRequest->getLanguageCode();

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

        $label = $this->labelRetriever->getLabel( $propertyId, $languageCode );
        if ( !$label ) {
            throw UseCaseError::newResourceNotFound( 'label' );
        }

        return new GetPropertyLabelWithFallbackResponse( $label, $lastModified, $revisionId );
    }

}