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<?php
/**
* Implements Special:Deadenpages
*
* 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
*/
/**
* A special page that list pages that contain no link to other pages
*
* @ingroup SpecialPage
*/
class DeadendPagesPage extends PageQueryPage {
function getName( ) {
return "Deadendpages";
}
function getPageHeader() {
return wfMsgExt( 'deadendpagestext', array( 'parse' ) );
}
/**
* LEFT JOIN is expensive
*
* @return true
*/
function isExpensive( ) {
return 1;
}
function isSyndicated() { return false; }
/**
* @return false
*/
function sortDescending() {
return false;
}
/**
* @return string an sqlquery
*/
function getSQL() {
$dbr = wfGetDB( DB_SLAVE );
list( $page, $pagelinks ) = $dbr->tableNamesN( 'page', 'pagelinks' );
return "SELECT 'Deadendpages' as type, page_namespace AS namespace, page_title as title, page_title AS value " .
"FROM $page LEFT JOIN $pagelinks ON page_id = pl_from " .
"WHERE pl_from IS NULL " .
"AND page_namespace = 0 " .
"AND page_is_redirect = 0";
}
}
/**
* Constructor
*/
function wfSpecialDeadendpages() {
list( $limit, $offset ) = wfCheckLimits();
$depp = new DeadendPagesPage();
return $depp->doQuery( $offset, $limit );
}
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