SpecialMostlinkedcategories.php

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<?php
class MostlinkedCategoriesPage extends QueryPage {

        function __construct( $name = 'Mostlinkedcategories' ) {
                parent::__construct( $name );
        }

        function isSyndicated() {
                return false;
        }

        function getQueryInfo() {
                return array (
                        'tables' => array ( 'category' ),
                        'fields' => array ( 'title' => 'cat_title',
                                        'namespace' => NS_CATEGORY,
                                        'value' => 'cat_pages' ),
                );
        }

        function sortDescending() {
                return true;
        }

        function preprocessResults( $db, $res ) {
                if ( !$res->numRows() ) {
                        return;
                }

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

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

        function formatResult( $skin, $result ) {
                global $wgContLang;

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

                $text = $wgContLang->convert( $nt->getText() );

                $plink = Linker::link( $nt, htmlspecialchars( $text ) );

                $nlinks = $this->msg( 'nmembers' )->numParams( $result->value )->escaped();
                return $this->getLanguage()->specialList( $plink, $nlinks );
        }
}