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+<?php
+/**
+ * Implements Special:Mostinterwikis
+ *
+ * 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
+ */
+
+use Wikimedia\Rdbms\IResultWrapper;
+use Wikimedia\Rdbms\IDatabase;
+
+/**
+ * A special page that listed pages that have highest interwiki count
+ *
+ * @ingroup SpecialPage
+ */
+class MostinterwikisPage extends QueryPage {
+ function __construct( $name = 'Mostinterwikis' ) {
+ parent::__construct( $name );
+ }
+
+ public function isExpensive() {
+ return true;
+ }
+
+ function isSyndicated() {
+ return false;
+ }
+
+ public function getQueryInfo() {
+ return [
+ 'tables' => [
+ 'langlinks',
+ 'page'
+ ], 'fields' => [
+ 'namespace' => 'page_namespace',
+ 'title' => 'page_title',
+ 'value' => 'COUNT(*)'
+ ], 'conds' => [
+ 'page_namespace' => MWNamespace::getContentNamespaces()
+ ], 'options' => [
+ 'HAVING' => 'COUNT(*) > 1',
+ 'GROUP BY' => [
+ 'page_namespace',
+ 'page_title'
+ ]
+ ], 'join_conds' => [
+ 'page' => [
+ 'LEFT JOIN',
+ 'page_id = ll_from'
+ ]
+ ]
+ ];
+ }
+
+ /**
+ * Pre-fill the link cache
+ *
+ * @param IDatabase $db
+ * @param IResultWrapper $res
+ */
+ function preprocessResults( $db, $res ) {
+ $this->executeLBFromResultWrapper( $res );
+ }
+
+ /**
+ * @param Skin $skin
+ * @param object $result
+ * @return string
+ */
+ function formatResult( $skin, $result ) {
+ $title = Title::makeTitleSafe( $result->namespace, $result->title );
+ if ( !$title ) {
+ return Html::element(
+ 'span',
+ [ 'class' => 'mw-invalidtitle' ],
+ Linker::getInvalidTitleDescription(
+ $this->getContext(),
+ $result->namespace,
+ $result->title
+ )
+ );
+ }
+
+ $linkRenderer = $this->getLinkRenderer();
+ if ( $this->isCached() ) {
+ $link = $linkRenderer->makeLink( $title );
+ } else {
+ $link = $linkRenderer->makeKnownLink( $title );
+ }
+
+ $count = $this->msg( 'ninterwikis' )->numParams( $result->value )->escaped();
+
+ return $this->getLanguage()->specialList( $link, $count );
+ }
+
+ protected function getGroupName() {
+ return 'highuse';
+ }
+}