wikimedia/mediawiki-extensions-Wikibase

<?php

declare( strict_types = 1 );

namespace Wikibase\DataModel\Serializers;

use Serializers\DispatchableSerializer;
use Serializers\Exceptions\SerializationException;
use Serializers\Exceptions\UnsupportedObjectException;
use Wikibase\DataModel\Snak\Snak;
use Wikibase\DataModel\Snak\SnakList;

/**
 * Package private
 *
 * @license GPL-2.0-or-later
 * @author Thomas Pellissier Tanon
 */
class SnakListSerializer extends MapSerializer implements DispatchableSerializer {

    private SnakSerializer $snakSerializer;

    public function __construct( SnakSerializer $snakSerializer, bool $useObjectsForEmptyMaps ) {
        parent::__construct( $useObjectsForEmptyMaps );
        $this->snakSerializer = $snakSerializer;
    }

    /**
     * @see Serializer::isSerializerFor
     *
     * @param mixed $object
     *
     * @return bool
     */
    public function isSerializerFor( $object ) {
        return $object instanceof SnakList;
    }

    /**
     * @see Serializer::serialize
     *
     * @param SnakList $object
     *
     * @throws SerializationException
     * @return array[]
     */
    public function serialize( $object ) {
        if ( !$this->isSerializerFor( $object ) ) {
            throw new UnsupportedObjectException(
                $object,
                'SnakListSerializer can only serialize SnakList objects'
            );
        }
        return $this->serializeMap( $this->generateSerializedArrayRepresentation( $object ) );
    }

    protected function generateSerializedArrayRepresentation( SnakList $snaks ): array {
        $serialization = [];

        /**
         * @var Snak $snak
         */
        foreach ( $snaks as $snak ) {
            $propertyId = $snak->getPropertyId()->getSerialization();
            $serialization[$propertyId][] = $this->snakSerializer->serialize( $snak );
        }

        return $serialization;
    }
}