includes/SpecialMostlinked.php

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