includes/SpecialMostlinked.php

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