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<?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 isExpensive() { return true; }
function getName() {
return 'Unusedcategories';
}
function getPageHeader() {
return wfMsgExt( 'unusedcategoriestext', array( 'parse' ) );
}
function getSQL() {
$NScat = NS_CATEGORY;
$dbr = wfGetDB( DB_SLAVE );
list( $categorylinks, $page ) = $dbr->tableNamesN( 'categorylinks', 'page' );
return "SELECT 'Unusedcategories' as type,
{$NScat} as namespace, page_title as title, page_title as value
FROM $page
LEFT JOIN $categorylinks ON page_title=cl_to
WHERE cl_from IS NULL
AND page_namespace = {$NScat}
AND page_is_redirect = 0";
}
function formatResult( $skin, $result ) {
$title = Title::makeTitle( NS_CATEGORY, $result->title );
return $skin->link( $title, $title->getText() );
}
}
/** constructor */
function wfSpecialUnusedCategories() {
list( $limit, $offset ) = wfCheckLimits();
$uc = new UnusedCategoriesPage();
return $uc->doQuery( $offset, $limit );
}
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