FileContentHandler.php

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<?php

use MediaWiki\MediaWikiServices;

class FileContentHandler extends WikitextContentHandler {

    public function getFieldsForSearchIndex( SearchEngine $engine ) {
        $fields = [];
        $fields['file_media_type'] =
            $engine->makeSearchFieldMapping( 'file_media_type', SearchIndexField::INDEX_TYPE_KEYWORD );
        $fields['file_media_type']->setFlag( SearchIndexField::FLAG_CASEFOLD );
        $fields['file_mime'] =
            $engine->makeSearchFieldMapping( 'file_mime', SearchIndexField::INDEX_TYPE_SHORT_TEXT );
        $fields['file_mime']->setFlag( SearchIndexField::FLAG_CASEFOLD );
        $fields['file_size'] =
            $engine->makeSearchFieldMapping( 'file_size', SearchIndexField::INDEX_TYPE_INTEGER );
        $fields['file_width'] =
            $engine->makeSearchFieldMapping( 'file_width', SearchIndexField::INDEX_TYPE_INTEGER );
        $fields['file_height'] =
            $engine->makeSearchFieldMapping( 'file_height', SearchIndexField::INDEX_TYPE_INTEGER );
        $fields['file_bits'] =
            $engine->makeSearchFieldMapping( 'file_bits', SearchIndexField::INDEX_TYPE_INTEGER );
        $fields['file_resolution'] =
            $engine->makeSearchFieldMapping( 'file_resolution', SearchIndexField::INDEX_TYPE_INTEGER );
        $fields['file_text'] =
            $engine->makeSearchFieldMapping( 'file_text', SearchIndexField::INDEX_TYPE_TEXT );
        return $fields;
    }

    public function getDataForSearchIndex(
        WikiPage $page,
        ParserOutput $parserOutput,
        SearchEngine $engine
    ) {
        $fields = [];

        $title = $page->getTitle();
        if ( NS_FILE != $title->getNamespace() ) {
            return [];
        }
        $file = MediaWikiServices::getInstance()->getRepoGroup()->getLocalRepo()
            ->newFile( $title );
        if ( !$file || !$file->exists() ) {
            return [];
        }

        $handler = $file->getHandler();
        if ( $handler ) {
            $fields['file_text'] = $handler->getEntireText( $file );
        }
        $fields['file_media_type'] = $file->getMediaType();
        $fields['file_mime'] = $file->getMimeType();
        $fields['file_size'] = $file->getSize();
        $fields['file_width'] = $file->getWidth();
        $fields['file_height'] = $file->getHeight();
        $fields['file_bits'] = $file->getBitDepth();
        $fields['file_resolution'] =
            (int)floor( sqrt( $fields['file_width'] * $fields['file_height'] ) );

        return $fields;
    }

}