includes/specialpage/WantedQueryPage.php

   1 <?php
   2 /**
   3  * Class definition for a wanted query page.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * Class definition for a wanted query page like
  26  * WantedPages, WantedTemplates, etc
  27  * @ingroup SpecialPage
  28  */
  29 abstract class WantedQueryPage extends QueryPage {
  30         function isExpensive() {
  31                 return true;
  32         }
  33
  34         function isSyndicated() {
  35                 return false;
  36         }
  37
  38         /**
  39          * Cache page existence for performance
  40          * @param IDatabase $db
  41          * @param ResultWrapper $res
  42          */
  43         function preprocessResults( $db, $res ) {
  44                 if ( !$res->numRows() ) {
  45                         return;
  46                 }
  47
  48                 $batch = new LinkBatch;
  49                 foreach ( $res as $row ) {
  50                         $batch->add( $row->namespace, $row->title );
  51                 }
  52                 $batch->execute();
  53
  54                 // Back to start for display
  55                 $res->seek( 0 );
  56         }
  57
  58         /**
  59          * Should formatResult() always check page existence, even if
  60          * the results are fresh?  This is a (hopefully temporary)
  61          * kluge for Special:WantedFiles, which may contain false
  62          * positives for files that exist e.g. in a shared repo (bug
  63          * 6220).
  64          * @return bool
  65          */
  66         function forceExistenceCheck() {
  67                 return false;
  68         }
  69
  70         /**
  71          * Format an individual result
  72          *
  73          * @param Skin $skin Skin to use for UI elements
  74          * @param object $result Result row
  75          * @return string
  76          */
  77         public function formatResult( $skin, $result ) {
  78                 $title = Title::makeTitleSafe( $result->namespace, $result->title );
  79                 if ( $title instanceof Title ) {
  80                         if ( $this->isCached() || $this->forceExistenceCheck() ) {
  81                                 $pageLink = $this->existenceCheck( $title )
  82                                         ? '<del>' . Linker::link( $title ) . '</del>'
  83                                         : Linker::link( $title );
  84                         } else {
  85                                 $pageLink = Linker::link(
  86                                         $title,
  87                                         null,
  88                                         array(),
  89                                         array(),
  90                                         array( 'broken' )
  91                                 );
  92                         }
  93                         return $this->getLanguage()->specialList( $pageLink, $this->makeWlhLink( $title, $result ) );
  94                 } else {
  95                         return $this->msg( 'wantedpages-badtitle', $result->title )->escaped();
  96                 }
  97         }
  98
  99         /**
 100          * Does the Title currently exists
 101          *
 102          * This method allows a subclass to override this check
 103          * (For example, wantedfiles, would want to check if the file exists
 104          * not just that a page in the file namespace exists).
 105          *
 106          * This will only control if the link is crossed out. Whether or not the link
 107          * is blue vs red is controlled by if the title exists.
 108          *
 109          * @note This will only be run if the page is cached (ie $wgMiserMode = true)
 110          *   unless forceExistenceCheck() is true.
 111          * @since 1.24
 112          * @return bool
 113          */
 114         protected function existenceCheck( Title $title ) {
 115                 return $title->isKnown();
 116         }
 117
 118         /**
 119          * Make a "what links here" link for a given title
 120          *
 121          * @param Title $title Title to make the link for
 122          * @param object $result Result row
 123          * @return string
 124          */
 125         private function makeWlhLink( $title, $result ) {
 126                 $wlh = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 127                 $label = $this->msg( 'nlinks' )->numParams( $result->value )->escaped();
 128                 return Linker::link( $wlh, $label );
 129         }
 130 }