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+<?php
+/**
+ * Implements Special:Mostinterwikis
+ *
+ * Copyright © 2012 Umherirrender
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup SpecialPage
+ * @author Umherirrender
+ */
+
+/**
+ * A special page that listed pages that have highest interwiki count
+ *
+ * @ingroup SpecialPage
+ */
+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'
+ )
+ )
+ );
+ }
+
+ /**
+ * Pre-fill the link cache
+ *
+ * @param $db DatabaseBase
+ * @param $res
+ */
+ 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 );
+ }
+
+ /**
+ * @param $skin Skin
+ * @param $result
+ * @return string
+ */
+ 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 );
+ }
+}