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   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          $joinConds = array(
  60              'pagelinks' => array(
  61                  'LEFT JOIN', array(
  62                      'pl_namespace = page_namespace',
  63                      'pl_title = page_title'
  64                  )
  65              ),
  66              'templatelinks' => array(
  67                  'LEFT JOIN', array(
  68                      'tl_namespace = page_namespace',
  69                      'tl_title = page_title'
  70                  )
  71              )
  72          );
  73  
  74          // Allow extensions to modify the query
  75          wfRunHooks( 'LonelyPagesQuery', array( &$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  }