wikimedia/mediawiki-extensions-Wikibase

<?php

namespace Wikibase\Repo\Rdf\Values;

use Wikibase\DataModel\Snak\PropertyValueSnak;
use Wikibase\Repo\Rdf\EntityMentionListener;
use Wikibase\Repo\Rdf\RdfVocabulary;
use Wikibase\Repo\Rdf\ValueSnakRdfBuilder;
use Wikimedia\Purtle\RdfWriter;

/**
 * RDF mapping for wikibase-entity DataValues.
 *
 * @license GPL-2.0-or-later
 * @author Daniel Kinzler
 * @author Stas Malyshev
 */
class EntityIdRdfBuilder implements ValueSnakRdfBuilder {

    /**
     * @var RdfVocabulary
     */
    private $vocabulary;

    /**
     * @var EntityMentionListener
     */
    private $mentionedEntityTracker;

    public function __construct(
        RdfVocabulary $vocabulary,
        EntityMentionListener $mentionedEntityTracker
    ) {
        $this->vocabulary = $vocabulary;
        $this->mentionedEntityTracker = $mentionedEntityTracker;
    }

    /**
     * Adds specific value
     *
     * @param RdfWriter $writer
     * @param string $propertyValueNamespace Property value relation namespace
     * @param string $propertyValueLName Property value relation name
     * @param string $dataType Property data type
     * @param string $snakNamespace
     * @param PropertyValueSnak $snak
     */
    public function addValue(
        RdfWriter $writer,
        $propertyValueNamespace,
        $propertyValueLName,
        $dataType,
        $snakNamespace,
        PropertyValueSnak $snak
    ) {
        $value = $snak->getDataValue();
        $entityId = $value->getValue()->getEntityId();
        $entityLName = $this->vocabulary->getEntityLName( $entityId );
        $entityRepoName = $this->vocabulary->getEntityRepositoryName( $entityId );

        $writer->say( $propertyValueNamespace, $propertyValueLName )
            ->is( $this->vocabulary->entityNamespaceNames[$entityRepoName], $entityLName );

        $this->mentionedEntityTracker->entityReferenceMentioned( $entityId );
    }

}