1 files changed, 83 insertions, 0 deletions
diff --git a/www/wiki/includes/specials/SpecialUnusedcategories.php b/www/wiki/includes/specials/SpecialUnusedcategories.php
new file mode 100644
index 00000000..1469742a
--- /dev/null
+++ b/www/wiki/includes/specials/SpecialUnusedcategories.php
@@ -0,0 +1,83 @@
+<?php
+/**
+ * Implements Special:Unusedcategories
+ *
+ * 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
+ */
+
+/**
+ * @ingroup SpecialPage
+ */
+class UnusedCategoriesPage extends QueryPage {
+	function __construct( $name = 'Unusedcategories' ) {
+		parent::__construct( $name );
+	}
+
+	public function isExpensive() {
+		return true;
+	}
+
+	function getPageHeader() {
+		return $this->msg( 'unusedcategoriestext' )->parseAsBlock();
+	}
+
+	public function getQueryInfo() {
+		return [
+			'tables' => [ 'page', 'categorylinks' ],
+			'fields' => [
+				'namespace' => 'page_namespace',
+				'title' => 'page_title',
+				'value' => 'page_title'
+			],
+			'conds' => [
+				'cl_from IS NULL',
+				'page_namespace' => NS_CATEGORY,
+				'page_is_redirect' => 0
+			],
+			'join_conds' => [ 'categorylinks' => [ 'LEFT JOIN', 'cl_to = page_title' ] ]
+		];
+	}
+
+	/**
+	 * A should come before Z (T32907)
+	 * @return bool
+	 */
+	function sortDescending() {
+		return false;
+	}
+
+	/**
+	 * @param Skin $skin
+	 * @param object $result Result row
+	 * @return string
+	 */
+	function formatResult( $skin, $result ) {
+		$title = Title::makeTitle( NS_CATEGORY, $result->title );
+
+		return $this->getLinkRenderer()->makeLink( $title, $title->getText() );
+	}
+
+	protected function getGroupName() {
+		return 'maintenance';
+	}
+
+	public function preprocessResults( $db, $res ) {
+		$this->executeLBFromResultWrapper( $res );
+	}
+}