includes/specials/Wantedpages.php

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup SpecialPage
   5  */
   6
   7 /**
   8  * implements Special:Wantedpages
   9  * @ingroup SpecialPage
  10  */
  11 class WantedPagesPage extends QueryPage {
  12         var $nlinks;
  13
  14         function WantedPagesPage( $inc = false, $nlinks = true ) {
  15                 $this->setListoutput( $inc );
  16                 $this->nlinks = $nlinks;
  17         }
  18
  19         function getName() {
  20                 return 'Wantedpages';
  21         }
  22
  23         function isExpensive() {
  24                 return true;
  25         }
  26         function isSyndicated() { return false; }
  27
  28         function getSQL() {
  29                 global $wgWantedPagesThreshold;
  30                 $count = $wgWantedPagesThreshold - 1;
  31                 $dbr = wfGetDB( DB_SLAVE );
  32                 $pagelinks = $dbr->tableName( 'pagelinks' );
  33                 $page      = $dbr->tableName( 'page' );
  34                 return
  35                         "SELECT 'Wantedpages' AS type,
  36                                 pl_namespace AS namespace,
  37                                 pl_title AS title,
  38                                 COUNT(*) AS value
  39                          FROM $pagelinks
  40                          LEFT JOIN $page AS pg1
  41                          ON pl_namespace = pg1.page_namespace AND pl_title = pg1.page_title
  42                          LEFT JOIN $page AS pg2
  43                          ON pl_from = pg2.page_id
  44                          WHERE pg1.page_namespace IS NULL
  45                          AND pl_namespace NOT IN ( 2, 3 )
  46                          AND pg2.page_namespace != 8
  47                          GROUP BY 1,2,3
  48                          HAVING COUNT(*) > $count";
  49         }
  50
  51         /**
  52          * Cache page existence for performance
  53          */
  54         function preprocessResults( $db, $res ) {
  55                 $batch = new LinkBatch;
  56                 while ( $row = $db->fetchObject( $res ) )
  57                         $batch->add( $row->namespace, $row->title );
  58                 $batch->execute();
  59
  60                 // Back to start for display
  61                 if ( $db->numRows( $res ) > 0 )
  62                         // If there are no rows we get an error seeking.
  63                         $db->dataSeek( $res, 0 );
  64         }
  65
  66         /**
  67          * Format an individual result
  68          *
  69          * @param $skin Skin to use for UI elements
  70          * @param $result Result row
  71          * @return string
  72          */
  73         public function formatResult( $skin, $result ) {
  74                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  75                 if( $title instanceof Title ) {
  76                         if( $this->isCached() ) {
  77                                 $pageLink = $title->exists()
  78                                         ? '<s>' . $skin->makeLinkObj( $title ) . '</s>'
  79                                         : $skin->makeBrokenLinkObj( $title );
  80                         } else {
  81                                 $pageLink = $skin->makeBrokenLinkObj( $title );
  82                         }
  83                         return wfSpecialList( $pageLink, $this->makeWlhLink( $title, $skin, $result ) );
  84                 } else {
  85                         $tsafe = htmlspecialchars( $result->title );
  86                         return "Invalid title in result set; {$tsafe}";
  87                 }
  88         }
  89
  90         /**
  91          * Make a "what links here" link for a specified result if required
  92          *
  93          * @param $title Title to make the link for
  94          * @param $skin Skin to use
  95          * @param $result Result row
  96          * @return string
  97          */
  98         private function makeWlhLink( $title, $skin, $result ) {
  99                 global $wgLang;
 100                 if( $this->nlinks ) {
 101                         $wlh = SpecialPage::getTitleFor( 'Whatlinkshere' );
 102                         $label = wfMsgExt( 'nlinks', array( 'parsemag', 'escape' ),
 103                                 $wgLang->formatNum( $result->value ) );
 104                         return $skin->makeKnownLinkObj( $wlh, $label, 'target=' . $title->getPrefixedUrl() );
 105                 } else {
 106                         return null;
 107                 }
 108         }
 109
 110 }
 111
 112 /**
 113  * constructor
 114  */
 115 function wfSpecialWantedpages( $par = null, $specialPage ) {
 116         $inc = $specialPage->including();
 117
 118         if ( $inc ) {
 119                 @list( $limit, $nlinks ) = explode( '/', $par, 2 );
 120                 $limit = (int)$limit;
 121                 $nlinks = $nlinks === 'nlinks';
 122                 $offset = 0;
 123         } else {
 124                 list( $limit, $offset ) = wfCheckLimits();
 125                 $nlinks = true;
 126         }
 127
 128         $wpp = new WantedPagesPage( $inc, $nlinks );
 129
 130         $wpp->doQuery( $offset, $limit, !$inc );
 131 }