SpecialMostinterwikis.php

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<?php
class MostinterwikisPage extends QueryPage {
    function __construct( $name = 'Mostinterwikis' ) {
        parent::__construct( $name );
    }

    function isExpensive() {
        return true;
    }

    function isSyndicated() {
        return false;
    }

    function getQueryInfo() {
        return array(
            'tables' => array(
                'langlinks',
                'page'
            ), 'fields' => array(
                'namespace' => 'page_namespace',
                'title' => 'page_title',
                'value' => 'COUNT(*)'
            ), 'conds' => array(
                'page_namespace' => MWNamespace::getContentNamespaces()
            ), 'options' => array(
                'HAVING' => 'COUNT(*) > 1',
                'GROUP BY' => array(
                    'page_namespace',
                    'page_title'
                )
            ), 'join_conds' => array(
                'page' => array(
                    'LEFT JOIN',
                    'page_id = ll_from'
                )
            )
        );
    }

    function preprocessResults( $db, $res ) {
        # There's no point doing a batch check if we aren't caching results;
        # the page must exist for it to have been pulled out of the table
        if ( !$this->isCached() || !$res->numRows() ) {
            return;
        }

        $batch = new LinkBatch;
        foreach ( $res as $row ) {
            $batch->add( $row->namespace, $row->title );
        }
        $batch->execute();

        // Back to start for display
        $res->seek( 0 );
    }

    function formatResult( $skin, $result ) {
        $title = Title::makeTitleSafe( $result->namespace, $result->title );
        if ( !$title ) {
            return Html::element(
                'span',
                array( 'class' => 'mw-invalidtitle' ),
                Linker::getInvalidTitleDescription(
                    $this->getContext(),
                    $result->namespace,
                    $result->title
                )
            );
        }

        if ( $this->isCached() ) {
            $link = Linker::link( $title );
        } else {
            $link = Linker::linkKnown( $title );
        }

        $count = $this->msg( 'ninterwikis' )->numParams( $result->value )->escaped();

        return $this->getLanguage()->specialList( $link, $count );
    }

    protected function getGroupName() {
        return 'highuse';
    }
}