includes/SpecialWantedpages.php

   1 <?php
   2 /**
   3  *
   4  * @addtogroup SpecialPage
   5  */
   6
   7 /**
   8  * implements Special:Wantedpages
   9  * @addtogroup 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->addObj( Title::makeTitleSafe( $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 Skin to use for UI elements
  70          * @param object $result Result row
  71          * @return string
  72          */
  73         public function formatResult( $skin, $result ) {
  74                 global $wgLang;
  75                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  76                 if( $title instanceof Title ) {
  77                         if( $this->isCached() ) {
  78                                 $pageLink = $title->exists()
  79                                         ? '<s>' . $skin->makeLinkObj( $title ) . '</s>'
  80                                         : $skin->makeBrokenLinkObj( $title );
  81                         } else {
  82                                 $pageLink = $skin->makeBrokenLinkObj( $title );
  83                         }
  84                         return wfSpecialList( $pageLink, $this->makeWlhLink( $title, $skin, $result ) );
  85                 } else {
  86                         $tsafe = htmlspecialchars( $result->title );
  87                         return "Invalid title in result set; {$tsafe}";
  88                 }
  89         }
  90
  91         /**
  92          * Make a "what links here" link for a specified result if required
  93          *
  94          * @param Title $title Title to make the link for
  95          * @param Skin $skin Skin to use
  96          * @param object $result Result row
  97          * @return string
  98          */
  99         private function makeWlhLink( $title, $skin, $result ) {
 100                 global $wgLang;
 101                 if( $this->nlinks ) {
 102                         $wlh = SpecialPage::getTitleFor( 'Whatlinkshere' );
 103                         $label = wfMsgExt( 'nlinks', array( 'parsemag', 'escape' ),
 104                                 $wgLang->formatNum( $result->value ) );
 105                         return $skin->makeKnownLinkObj( $wlh, $label, 'target=' . $title->getPrefixedUrl() );
 106                 } else {
 107                         return null;
 108                 }
 109         }
 110
 111 }
 112
 113 /**
 114  * constructor
 115  */
 116 function wfSpecialWantedpages( $par = null, $specialPage ) {
 117         $inc = $specialPage->including();
 118
 119         if ( $inc ) {
 120                 @list( $limit, $nlinks ) = explode( '/', $par, 2 );
 121                 $limit = (int)$limit;
 122                 $nlinks = $nlinks === 'nlinks';
 123                 $offset = 0;
 124         } else {
 125                 list( $limit, $offset ) = wfCheckLimits();
 126                 $nlinks = true;
 127         }
 128
 129         $wpp = new WantedPagesPage( $inc, $nlinks );
 130
 131         $wpp->doQuery( $offset, $limit, !$inc );
 132 }
 133
 134