wikimedia/mediawiki-extensions-Wikibase

<?php

namespace Wikibase\Lib\Changes;

/**
 * Class for changes that can be represented as a Diff.
 *
 * @license GPL-2.0-or-later
 * @author Jeroen De Dauw < jeroendedauw@gmail.com >
 * @author Daniel Kinzler
 */
abstract class DiffChange extends ChangeRow {

    /**
     * @return EntityDiffChangedAspects
     */
    public function getCompactDiff() {
        $info = $this->getInfo();

        if ( !array_key_exists( ChangeRow::COMPACT_DIFF, $info ) ) {
            // This shouldn't happen, but we should be robust against corrupt, incomplete
            // obsolete instances in the database, etc.
            $this->logger->warning( 'Cannot get the diff when it has not been set yet.' );
            return ( new EntityDiffChangedAspectsFactory( $this->logger ) )->newEmpty();
        } else {
            return $info[ChangeRow::COMPACT_DIFF];
        }
    }

    public function setCompactDiff( EntityDiffChangedAspects $diff ) {
        $info = $this->getInfo();
        $info[ChangeRow::COMPACT_DIFF] = $diff;
        $this->setField( ChangeRow::INFO, $info );
    }

}