MessageProvider.php

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<?php
 
namespace MediaWiki\ShadowPage;
 
use MediaWiki\Content\ContentHandlerFactory;
use MediaWiki\Language\Language;
use MediaWiki\Language\MessageCache;
use MediaWiki\Page\PageReference;
use MediaWiki\Revision\SlotRecord;
use MediaWiki\Revision\SlotRoleRegistry;
use Wikimedia\Parsoid\Core\LinkTarget;
 
class MessageProvider extends BaseShadowPageProvider {
    public function __construct(
        private MessageCache $cache,
        private Language $contLang,
        private SlotRoleRegistry $slotRoleRegistry,
        private ContentHandlerFactory $contentHandlerFactory,
    ) {
    }
 
    public function get( PageReference $title ): ?ShadowPage {
        [ $name, $lang ] = $this->cache->figureMessage(
            $this->contLang->lcfirst( $title->getDBkey() )
        );
 
        $message = wfMessage( $name )->inLanguage( $lang )->useDatabase( false );
        if ( !$message->exists() ) {
            return null;
        }
        $text = $message->plain();
        $model = $this->slotRoleRegistry
            ->getRoleHandler( SlotRecord::MAIN )
            ->getDefaultModel( $title );
        $content = $this->contentHandlerFactory->getContentHandler( $model )
            ->unserializeContent( $text );
 
        return new MessagePage( $this->getParseHelper(), $content, $title );
    }
 
    public function existsForLink( PageReference|LinkTarget $link ): bool {
        [ $name, $lang ] = $this->cache->figureMessage(
            $this->contLang->lcfirst( $link->getDBkey() )
        );
 
        return wfMessage( $name )->inLanguage( $lang )->useDatabase( false )->exists();
    }
 
}