includes/SpecialWantedcategories.php

   1 <?php
   2 /**
   3  * A querypage to list the most wanted categories - implements Special:Wantedcategories
   4  *
   5  * @addtogroup SpecialPage
   6  *
   7  * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
   8  * @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
   9  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
  10  */
  11 class WantedCategoriesPage extends QueryPage {
  12
  13         function getName() {
  14                 return 'Wantedcategories';
  15         }
  16
  17         function isExpensive() {
  18                 return true;
  19         }
  20
  21         function isSyndicated() {
  22                 return false;
  23         }
  24
  25         function getSQL() {
  26                 $dbr = wfGetDB( DB_SLAVE );
  27                 list( $categorylinks, $page ) = $dbr->tableNamesN( 'categorylinks', 'page' );
  28                 $name = $dbr->addQuotes( $this->getName() );
  29                 return
  30                         "
  31                         SELECT
  32                                 $name as type,
  33                                 " . NS_CATEGORY . " as namespace,
  34                                 cl_to as title,
  35                                 COUNT(*) as value
  36                         FROM $categorylinks
  37                         LEFT JOIN $page ON cl_to = page_title AND page_namespace = ". NS_CATEGORY ."
  38                         WHERE page_title IS NULL
  39                         GROUP BY 1,2,3
  40                         ";
  41         }
  42
  43         function sortDescending() { return true; }
  44
  45         /**
  46          * Fetch user page links and cache their existence
  47          */
  48         function preprocessResults( $db, $res ) {
  49                 $batch = new LinkBatch;
  50                 while ( $row = $db->fetchObject( $res ) )
  51                         $batch->add( $row->namespace, $row->title );
  52                 $batch->execute();
  53
  54                 // Back to start for display
  55                 if ( $db->numRows( $res ) > 0 )
  56                         // If there are no rows we get an error seeking.
  57                         $db->dataSeek( $res, 0 );
  58         }
  59
  60         function formatResult( $skin, $result ) {
  61                 global $wgLang, $wgContLang;
  62
  63                 $nt = Title::makeTitle( $result->namespace, $result->title );
  64                 $text = $wgContLang->convert( $nt->getText() );
  65
  66                 $plink = $this->isCached() ?
  67                         $skin->makeLinkObj( $nt, htmlspecialchars( $text ) ) :
  68                         $skin->makeBrokenLinkObj( $nt, htmlspecialchars( $text ) );
  69
  70                 $nlinks = wfMsgExt( 'nmembers', array( 'parsemag', 'escape'),
  71                         $wgLang->formatNum( $result->value ) );
  72                 return wfSpecialList($plink, $nlinks);
  73         }
  74 }
  75
  76 /**
  77  * constructor
  78  */
  79 function wfSpecialWantedCategories() {
  80         list( $limit, $offset ) = wfCheckLimits();
  81
  82         $wpp = new WantedCategoriesPage();
  83
  84         $wpp->doQuery( $offset, $limit );
  85 }
  86
  87