includes/SpecialWantedcategories.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7 /**
   8  * A querypage to list the most wanted categories - implements Special:Wantedcategories
   9  *
  10  * @ingroup SpecialPage
  11  *
  12  * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
  13  * @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
  14  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
  15  */
  16 class WantedCategoriesPage extends QueryPage {
  17
  18         function getName() {
  19                 return 'Wantedcategories';
  20         }
  21
  22         function isExpensive() {
  23                 return true;
  24         }
  25
  26         function isSyndicated() {
  27                 return false;
  28         }
  29
  30         function getSQL() {
  31                 $dbr = wfGetDB( DB_SLAVE );
  32                 list( $categorylinks, $page ) = $dbr->tableNamesN( 'categorylinks', 'page' );
  33                 $name = $dbr->addQuotes( $this->getName() );
  34                 return
  35                         "
  36                         SELECT
  37                                 $name as type,
  38                                 " . NS_CATEGORY . " as namespace,
  39                                 cl_to as title,
  40                                 COUNT(*) as value
  41                         FROM $categorylinks
  42                         LEFT JOIN $page ON cl_to = page_title AND page_namespace = ". NS_CATEGORY ."
  43                         WHERE page_title IS NULL
  44                         GROUP BY 1,2,3
  45                         ";
  46         }
  47
  48         function sortDescending() { return true; }
  49
  50         /**
  51          * Fetch user page links and cache their existence
  52          */
  53         function preprocessResults( $db, $res ) {
  54                 $batch = new LinkBatch;
  55                 while ( $row = $db->fetchObject( $res ) )
  56                         $batch->add( $row->namespace, $row->title );
  57                 $batch->execute();
  58
  59                 // Back to start for display
  60                 if ( $db->numRows( $res ) > 0 )
  61                         // If there are no rows we get an error seeking.
  62                         $db->dataSeek( $res, 0 );
  63         }
  64
  65         function formatResult( $skin, $result ) {
  66                 global $wgLang, $wgContLang;
  67
  68                 $nt = Title::makeTitle( $result->namespace, $result->title );
  69                 $text = $wgContLang->convert( $nt->getText() );
  70
  71                 $plink = $this->isCached() ?
  72                         $skin->makeLinkObj( $nt, htmlspecialchars( $text ) ) :
  73                         $skin->makeBrokenLinkObj( $nt, htmlspecialchars( $text ) );
  74
  75                 $nlinks = wfMsgExt( 'nmembers', array( 'parsemag', 'escape'),
  76                         $wgLang->formatNum( $result->value ) );
  77                 return wfSpecialList($plink, $nlinks);
  78         }
  79 }
  80
  81 /**
  82  * constructor
  83  */
  84 function wfSpecialWantedCategories() {
  85         list( $limit, $offset ) = wfCheckLimits();
  86
  87         $wpp = new WantedCategoriesPage();
  88
  89         $wpp->doQuery( $offset, $limit );
  90 }