includes/specials/SpecialMostlinked.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7 /**
   8  * A special page to show pages ordered by the number of pages linking to them.
   9  * Implements Special:Mostlinked
  10  *
  11  * @ingroup SpecialPage
  12  *
  13  * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
  14  * @author Rob Church <robchur@gmail.com>
  15  * @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
  16  * @copyright © 2006 Rob Church
  17  * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
  18  */
  19 class MostlinkedPage extends QueryPage {
  20
  21         function getName() { return 'Mostlinked'; }
  22         function isExpensive() { return true; }
  23         function isSyndicated() { return false; }
  24
  25         /**
  26          * Note: Getting page_namespace only works if $this->isCached() is false
  27          */
  28         function getSQL() {
  29                 $dbr = wfGetDB( DB_SLAVE );
  30                 list( $pagelinks, $page ) = $dbr->tableNamesN( 'pagelinks', 'page' );
  31                 return
  32                         "SELECT 'Mostlinked' AS type,
  33                                 pl_namespace AS namespace,
  34                                 pl_title AS title,
  35                                 COUNT(*) AS value,
  36                                 page_namespace
  37                         FROM $pagelinks
  38                         LEFT JOIN $page ON pl_namespace=page_namespace AND pl_title=page_title
  39                         GROUP BY pl_namespace, pl_title, page_namespace
  40                         HAVING COUNT(*) > 1";
  41         }
  42
  43         /**
  44          * Pre-fill the link cache
  45          */
  46         function preprocessResults( $db, $res ) {
  47                 if( $db->numRows( $res ) > 0 ) {
  48                         $linkBatch = new LinkBatch();
  49                         while( $row = $db->fetchObject( $res ) )
  50                                 $linkBatch->add( $row->namespace, $row->title );
  51                         $db->dataSeek( $res, 0 );
  52                         $linkBatch->execute();
  53                 }
  54         }
  55
  56         /**
  57          * Make a link to "what links here" for the specified title
  58          *
  59          * @param $title Title being queried
  60          * @param $skin Skin to use
  61          * @return string
  62          */
  63         function makeWlhLink( &$title, $caption, &$skin ) {
  64                 $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedDBkey() );
  65                 return $skin->linkKnown( $wlh, $caption );
  66         }
  67
  68         /**
  69          * Make links to the page corresponding to the item, and the "what links here" page for it
  70          *
  71          * @param $skin Skin to be used
  72          * @param $result Result row
  73          * @return string
  74          */
  75         function formatResult( $skin, $result ) {
  76                 global $wgLang;
  77                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  78                 if ( !$title ) {
  79                         return '<!-- ' . htmlspecialchars( "Invalid title: [[$title]]" ) . ' -->';
  80                 }
  81                 $link = $skin->link( $title );
  82                 $wlh = $this->makeWlhLink( $title,
  83                         wfMsgExt( 'nlinks', array( 'parsemag', 'escape'),
  84                                 $wgLang->formatNum( $result->value ) ), $skin );
  85                 return wfSpecialList( $link, $wlh );
  86         }
  87 }
  88
  89 /**
  90  * constructor
  91  */
  92 function wfSpecialMostlinked() {
  93         list( $limit, $offset ) = wfCheckLimits();
  94
  95         $wpp = new MostlinkedPage();
  96
  97         $wpp->doQuery( $offset, $limit );
  98 }