includes/specials/SpecialUnusedcategories.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7 /**
   8  * @ingroup SpecialPage
   9  */
  10 class UnusedCategoriesPage extends QueryPage {
  11
  12         function isExpensive() { return true; }
  13
  14         function getName() {
  15                 return 'Unusedcategories';
  16         }
  17
  18         function getPageHeader() {
  19                 return wfMsgExt( 'unusedcategoriestext', array( 'parse' ) );
  20         }
  21
  22         function getSQL() {
  23                 $NScat = NS_CATEGORY;
  24                 $dbr = wfGetDB( DB_SLAVE );
  25                 list( $categorylinks, $page ) = $dbr->tableNamesN( 'categorylinks', 'page' );
  26                 return "SELECT 'Unusedcategories' as type,
  27                                 {$NScat} as namespace, page_title as title, page_title as value
  28                                 FROM $page
  29                                 LEFT JOIN $categorylinks ON page_title=cl_to
  30                                 WHERE cl_from IS NULL
  31                                 AND page_namespace = {$NScat}
  32                                 AND page_is_redirect = 0";
  33         }
  34
  35         function formatResult( $skin, $result ) {
  36                 $title = Title::makeTitle( NS_CATEGORY, $result->title );
  37                 return $skin->link( $title, $title->getText() );
  38         }
  39 }
  40
  41 /** constructor */
  42 function wfSpecialUnusedCategories() {
  43         list( $limit, $offset ) = wfCheckLimits();
  44         $uc = new UnusedCategoriesPage();
  45         return $uc->doQuery( $offset, $limit );
  46 }