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                 $tables = array( 'page', 'pagelinks', 'templatelinks' );
  53                 $conds = array(
  54                         'pl_namespace IS NULL',
  55                         'page_namespace' => MWNamespace::getContentNamespaces(),
  56                         'page_is_redirect' => 0,
  57                         'tl_namespace IS NULL'
  58                 );
  59                 $joinConds = array(
  60                         'pagelinks' => array(
  61                                 'LEFT JOIN', array(
  62                                         'pl_namespace = page_namespace',
  63                                         'pl_title = page_title'
  64                                 )
  65                         ),
  66                         'templatelinks' => array(
  67                                 'LEFT JOIN', array(
  68                                         'tl_namespace = page_namespace',
  69                                         'tl_title = page_title'
  70                                 )
  71                         )
  72                 );
  73
  74                 // Allow extensions to modify the query
  75                 Hooks::run( 'LonelyPagesQuery', array( &$tables, &$conds, &$joinConds ) );
  76
  77                 return array(
  78                         'tables' => $tables,
  79                         'fields' => array(
  80                                 'namespace' => 'page_namespace',
  81                                 'title' => 'page_title',
  82                                 'value' => 'page_title'
  83                         ),
  84                         'conds' => $conds,
  85                         'join_conds' => $joinConds
  86                 );
  87         }
  88
  89         function getOrderFields() {
  90                 // For some crazy reason ordering by a constant
  91                 // causes a filesort in MySQL 5
  92                 if ( count( MWNamespace::getContentNamespaces() ) > 1 ) {
  93                         return array( 'page_namespace', 'page_title' );
  94                 } else {
  95                         return array( 'page_title' );
  96                 }
  97         }
  98
  99         protected function getGroupName() {
 100                 return 'maintenance';
 101         }
 102 }