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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 __construct( $name = 'Deadendpages' ) {
parent::__construct( $name );
}
function getPageHeader() {
return $this->msg( 'deadendpagestext' )->parseAsBlock();
}
/**
* LEFT JOIN is expensive
*
* @return bool
*/
function isExpensive() {
return true;
}
function isSyndicated() {
return false;
}
/**
* @return bool
*/
function sortDescending() {
return false;
}
function getQueryInfo() {
return [
'tables' => [ 'page', 'pagelinks' ],
'fields' => [
'namespace' => 'page_namespace',
'title' => 'page_title',
'value' => 'page_title'
],
'conds' => [
'pl_from IS NULL',
'page_namespace' => MWNamespace::getContentNamespaces(),
'page_is_redirect' => 0
],
'join_conds' => [
'pagelinks' => [
'LEFT JOIN',
[ 'page_id=pl_from' ]
]
]
];
}
function getOrderFields() {
// For some crazy reason ordering by a constant
// causes a filesort
if ( count( MWNamespace::getContentNamespaces() ) > 1 ) {
return [ 'page_namespace', 'page_title' ];
} else {
return [ 'page_title' ];
}
}
protected function getGroupName() {
return 'maintenance';
}
}
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