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
  32         function __construct( $name = 'Lonelypages' ) {
  33                 parent::__construct( $name );
  34         }
  35
  36         function getPageHeader() {
  37                 return $this->msg( 'lonelypagestext' )->parseAsBlock();
  38         }
  39
  40         function sortDescending() {
  41                 return false;
  42         }
  43
  44         function isExpensive() {
  45                 return true;
  46         }
  47         function isSyndicated() { return false; }
  48
  49         function getQueryInfo() {
  50                 return array (
  51                         'tables' => array ( 'page', 'pagelinks',
  52                                         'templatelinks' ),
  53                         'fields' => array ( 'page_namespace AS namespace',
  54                                         'page_title AS title',
  55                                         'page_title AS value' ),
  56                         'conds' => array ( 'pl_namespace IS NULL',
  57                                         'page_namespace' => MWNamespace::getContentNamespaces(),
  58                                         'page_is_redirect' => 0,
  59                                         'tl_namespace IS NULL' ),
  60                         'join_conds' => array (
  61                                         'pagelinks' => array (
  62                                                 'LEFT JOIN', array (
  63                                                 'pl_namespace = page_namespace',
  64                                                 'pl_title = page_title' ) ),
  65                                         'templatelinks' => array (
  66                                                 'LEFT JOIN', array (
  67                                                 'tl_namespace = page_namespace',
  68                                                 'tl_title = page_title' ) ) )
  69                 );
  70         }
  71
  72         function getOrderFields() {
  73                 // For some crazy reason ordering by a constant
  74                 // causes a filesort in MySQL 5
  75                 if( count( MWNamespace::getContentNamespaces() ) > 1 ) {
  76                         return array( 'page_namespace', 'page_title' );
  77                 } else {
  78                         return array( 'page_title' );
  79                 }
  80         }
  81 }