includes/specials/SpecialLonelypages.php

   1 <?php
   2 /**
   3  * Implements Special:Lonelypaages
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * A special page looking for articles with no article linking to them,
  26  * thus being lonely.
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 class LonelyPagesPage extends PageQueryPage {
  31         function __construct( $name = 'Lonelypages' ) {
  32                 parent::__construct( $name );
  33         }
  34
  35         function getPageHeader() {
  36                 return $this->msg( 'lonelypagestext' )->parseAsBlock();
  37         }
  38
  39         function sortDescending() {
  40                 return false;
  41         }
  42
  43         function isExpensive() {
  44                 return true;
  45         }
  46
  47         function isSyndicated() {
  48                 return false;
  49         }
  50
  51         function getQueryInfo() {
  52                 return array(
  53                         'tables' => array(
  54                                 'page', 'pagelinks',
  55                                 'templatelinks'
  56                         ),
  57                         'fields' => array(
  58                                 'namespace' => 'page_namespace',
  59                                 'title' => 'page_title',
  60                                 'value' => 'page_title'
  61                         ),
  62                         'conds' => array(
  63                                 'pl_namespace IS NULL',
  64                                 'page_namespace' => MWNamespace::getContentNamespaces(),
  65                                 'page_is_redirect' => 0,
  66                                 'tl_namespace IS NULL'
  67                         ),
  68                         'join_conds' => array(
  69                                 'pagelinks' => array(
  70                                         'LEFT JOIN', array(
  71                                                 'pl_namespace = page_namespace',
  72                                                 'pl_title = page_title'
  73                                         )
  74                                 ),
  75                                 'templatelinks' => array(
  76                                         'LEFT JOIN', array(
  77                                                 'tl_namespace = page_namespace',
  78                                                 'tl_title = page_title'
  79                                         )
  80                                 )
  81                         )
  82                 );
  83         }
  84
  85         function getOrderFields() {
  86                 // For some crazy reason ordering by a constant
  87                 // causes a filesort in MySQL 5
  88                 if ( count( MWNamespace::getContentNamespaces() ) > 1 ) {
  89                         return array( 'page_namespace', 'page_title' );
  90                 } else {
  91                         return array( 'page_title' );
  92                 }
  93         }
  94
  95         protected function getGroupName() {
  96                 return 'maintenance';
  97         }
  98 }