wikimedia/mediawiki-extensions-Wikibase

<?php

declare( strict_types = 1 );

namespace Wikibase\Repo\Diff;

use MediaWiki\Content\Content;
use MediaWiki\Output\OutputPage;
use SlotDiffRenderer;
use Wikibase\Repo\Content\EntityContent;

/**
 * @license GPL-2.0-or-later
 */
class EntitySlotDiffRenderer extends SlotDiffRenderer {
    private EntityDiffVisualizer $diffVisualizer;

    private string $langCode;

    /**
     * @param EntityDiffVisualizer $diffVisualizer
     * @param string $langCode The language code which will be used by $diffVisualizer
     */
    public function __construct( EntityDiffVisualizer $diffVisualizer, string $langCode ) {
        $this->diffVisualizer = $diffVisualizer;
        $this->langCode = $langCode;
    }

    public function getDiff( Content $oldContent = null, Content $newContent = null ) {
        $this->normalizeContents( $oldContent, $newContent, [ EntityContent::class ] );
        '@phan-var EntityContent $oldContent'; /** @var EntityContent $oldContent */
        '@phan-var EntityContent $newContent'; /** @var EntityContent $newContent */

        $diff = $oldContent->getDiff( $newContent );
        return $this->diffVisualizer->visualizeEntityContentDiff( $diff );
    }

    public function addModules( OutputPage $output ) {
        // add Wikibase styles, the diff may include entity links with labels, including fallback indicators
        $output->addModuleStyles( [ 'wikibase.alltargets' ] );
    }

    public function getExtraCacheKeys() {
        return [ "lang-{$this->langCode}" ];
    }
}