SiteExporter.php

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<?php
class SiteExporter {
 
    private $sink;
 
    public function __construct( $sink ) {
        // phpcs:ignore MediaWiki.Usage.ForbiddenFunctions.is_resource
        if ( !is_resource( $sink ) || get_resource_type( $sink ) !== 'stream' ) {
            throw new InvalidArgumentException( '$sink must be a file handle' );
        }
 
        $this->sink = $sink;
    }
 
    public function exportSites( $sites ) {
        $attributes = [
            'version' => '1.0',
            'xmlns' => 'http://www.mediawiki.org/xml/sitelist-1.0/',
        ];
 
        fwrite( $this->sink, Xml::openElement( 'sites', $attributes ) . "\n" );
 
        foreach ( $sites as $site ) {
            $this->exportSite( $site );
        }
 
        fwrite( $this->sink, Xml::closeElement( 'sites' ) . "\n" );
        fflush( $this->sink );
    }
 
    private function exportSite( Site $site ) {
        if ( $site->getType() !== Site::TYPE_UNKNOWN ) {
            $siteAttr = [ 'type' => $site->getType() ];
        } else {
            $siteAttr = null;
        }
 
        fwrite( $this->sink, "\t" . Xml::openElement( 'site', $siteAttr ) . "\n" );
 
        fwrite( $this->sink, "\t\t" . Xml::element( 'globalid', null, $site->getGlobalId() ) . "\n" );
 
        if ( $site->getGroup() !== Site::GROUP_NONE ) {
            fwrite( $this->sink, "\t\t" . Xml::element( 'group', null, $site->getGroup() ) . "\n" );
        }
 
        if ( $site->getSource() !== Site::SOURCE_LOCAL ) {
            fwrite( $this->sink, "\t\t" . Xml::element( 'source', null, $site->getSource() ) . "\n" );
        }
 
        if ( $site->shouldForward() ) {
            fwrite( $this->sink, "\t\t" . Xml::element( 'forward', null, '' ) . "\n" );
        }
 
        foreach ( $site->getAllPaths() as $type => $path ) {
            fwrite( $this->sink, "\t\t" . Xml::element( 'path', [ 'type' => $type ], $path ) . "\n" );
        }
 
        foreach ( $site->getLocalIds() as $type => $ids ) {
            foreach ( $ids as $id ) {
                fwrite( $this->sink, "\t\t" . Xml::element( 'localid', [ 'type' => $type ], $id ) . "\n" );
            }
        }
 
        // @todo: export <data>
        // @todo: export <config>
 
        fwrite( $this->sink, "\t" . Xml::closeElement( 'site' ) . "\n" );
    }
 
}