1 files changed, 151 insertions, 0 deletions
diff --git a/www/wiki/includes/specials/SpecialListredirects.php b/www/wiki/includes/specials/SpecialListredirects.php
new file mode 100644
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+++ b/www/wiki/includes/specials/SpecialListredirects.php
@@ -0,0 +1,151 @@
+<?php
+/**
+ * Implements Special:Listredirects
+ *
+ * Copyright © 2006 Rob Church
+ *
+ * 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 Rob Church <robchur@gmail.com>
+ */
+
+use Wikimedia\Rdbms\IResultWrapper;
+use Wikimedia\Rdbms\IDatabase;
+
+/**
+ * Special:Listredirects - Lists all the redirects on the wiki.
+ * @ingroup SpecialPage
+ */
+class ListredirectsPage extends QueryPage {
+	function __construct( $name = 'Listredirects' ) {
+		parent::__construct( $name );
+	}
+
+	public function isExpensive() {
+		return true;
+	}
+
+	function isSyndicated() {
+		return false;
+	}
+
+	function sortDescending() {
+		return false;
+	}
+
+	public function getQueryInfo() {
+		return [
+			'tables' => [ 'p1' => 'page', 'redirect', 'p2' => 'page' ],
+			'fields' => [ 'namespace' => 'p1.page_namespace',
+				'title' => 'p1.page_title',
+				'value' => 'p1.page_title',
+				'rd_namespace',
+				'rd_title',
+				'rd_fragment',
+				'rd_interwiki',
+				'redirid' => 'p2.page_id' ],
+			'conds' => [ 'p1.page_is_redirect' => 1 ],
+			'join_conds' => [ 'redirect' => [
+				'LEFT JOIN', 'rd_from=p1.page_id' ],
+				'p2' => [ 'LEFT JOIN', [
+					'p2.page_namespace=rd_namespace',
+					'p2.page_title=rd_title' ] ] ]
+		];
+	}
+
+	function getOrderFields() {
+		return [ 'p1.page_namespace', 'p1.page_title' ];
+	}
+
+	/**
+	 * Cache page existence for performance
+	 *
+	 * @param IDatabase $db
+	 * @param IResultWrapper $res
+	 */
+	function preprocessResults( $db, $res ) {
+		if ( !$res->numRows() ) {
+			return;
+		}
+
+		$batch = new LinkBatch;
+		foreach ( $res as $row ) {
+			$batch->add( $row->namespace, $row->title );
+			$redirTarget = $this->getRedirectTarget( $row );
+			if ( $redirTarget ) {
+				$batch->addObj( $redirTarget );
+			}
+		}
+		$batch->execute();
+
+		// Back to start for display
+		$res->seek( 0 );
+	}
+
+	/**
+	 * @param stdClass $row
+	 * @return Title|null
+	 */
+	protected function getRedirectTarget( $row ) {
+		if ( isset( $row->rd_title ) ) {
+			return Title::makeTitle( $row->rd_namespace,
+				$row->rd_title, $row->rd_fragment,
+				$row->rd_interwiki
+			);
+		} else {
+			$title = Title::makeTitle( $row->namespace, $row->title );
+			$article = WikiPage::factory( $title );
+
+			return $article->getRedirectTarget();
+		}
+	}
+
+	/**
+	 * @param Skin $skin
+	 * @param object $result Result row
+	 * @return string
+	 */
+	function formatResult( $skin, $result ) {
+		$linkRenderer = $this->getLinkRenderer();
+		# Make a link to the redirect itself
+		$rd_title = Title::makeTitle( $result->namespace, $result->title );
+		$rd_link = $linkRenderer->makeLink(
+			$rd_title,
+			null,
+			[],
+			[ 'redirect' => 'no' ]
+		);
+
+		# Find out where the redirect leads
+		$target = $this->getRedirectTarget( $result );
+		if ( $target ) {
+			# Make a link to the destination page
+			$lang = $this->getLanguage();
+			$arr = $lang->getArrow() . $lang->getDirMark();
+			$targetLink = $linkRenderer->makeLink( $target, $target->getFullText() );
+
+			return "$rd_link $arr $targetLink";
+		} else {
+			return "<del>$rd_link</del>";
+		}
+	}
+
+	protected function getGroupName() {
+		return 'pages';
+	}
+}