CacheKeyHelper.php

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<?php
namespace MediaWiki\Page;
 
use LogicException;
use MediaWiki\DAO\WikiAwareEntity;
use Wikimedia\Parsoid\Core\LinkTarget;
 
abstract class CacheKeyHelper {
 
    private function __construct() {
        throw new LogicException( 'May not be instantiated' );
    }
 
    public static function getKeyForPage( $page ): string {
        $prefix = 'ns' . $page->getNamespace();
 
        if ( $page instanceof WikiAwareEntity && $page->getWikiId() !== WikiAwareEntity::LOCAL ) {
            $prefix .= '@id@' . $page->getWikiId();
        } elseif ( $page instanceof LinkTarget && $page->getInterwiki() !== '' ) {
            $prefix .= '@iw@' . $page->getInterwiki();
        }
 
        return $prefix . ':' . $page->getDBkey();
    }
}
 
class_alias( CacheKeyHelper::class, 'MediaWiki\Cache\CacheKeyHelper' );