includes/actions/InfoAction.php

   1 <?php
   2 /**
   3  * Display informations about a page.
   4  * Very inefficient for the moment.
   5  *
   6  * Copyright © 2011 Alexandre Emsenhuber
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  21  *
  22  * @file
  23  * @ingroup Actions
  24  */
  25
  26 class InfoAction extends FormlessAction {
  27
  28         public function getName() {
  29                 return 'info';
  30         }
  31
  32         protected function getDescription() {
  33                 return '';
  34         }
  35
  36         public function requiresWrite() {
  37                 return false;
  38         }
  39
  40         public function requiresUnblock() {
  41                 return false;
  42         }
  43
  44         protected function getPageTitle() {
  45                 return $this->msg( 'pageinfo-title', $this->getTitle()->getSubjectPage()->getPrefixedText() )->text();
  46         }
  47
  48         public function onView() {
  49                 global $wgDisableCounters;
  50
  51                 $title = $this->getTitle()->getSubjectPage();
  52
  53                 $userCanViewUnwatchedPages = $this->getUser()->isAllowed( 'unwatchedpages' );
  54
  55                 $pageInfo = self::pageCountInfo( $title, $userCanViewUnwatchedPages, $wgDisableCounters );
  56                 $talkInfo = self::pageCountInfo( $title->getTalkPage(), $userCanViewUnwatchedPages, $wgDisableCounters );
  57
  58                 $lang = $this->getLanguage();
  59
  60                 $content =
  61                         Html::rawElement( 'tr', array(),
  62                                 Html::element( 'th', array(), '' ) .
  63                                         Html::element( 'th', array(), $this->msg( 'pageinfo-subjectpage' )->text() ) .
  64                                         Html::element( 'th', array(), $this->msg( 'pageinfo-talkpage' )->text() )
  65                         ) .
  66                         Html::rawElement( 'tr', array(),
  67                                 Html::element( 'th', array( 'colspan' => 3 ), $this->msg( 'pageinfo-header-edits' )->text() )
  68                         ) .
  69                         Html::rawElement( 'tr', array(),
  70                                 Html::element( 'td', array(), $this->msg( 'pageinfo-edits' )->text() ) .
  71                                         Html::element( 'td', array(), $lang->formatNum( $pageInfo['edits'] ) ) .
  72                                         Html::element( 'td', array(), $lang->formatNum( $talkInfo['edits'] ) )
  73                         ) .
  74                         Html::rawElement( 'tr', array(),
  75                                 Html::element( 'td', array(), $this->msg( 'pageinfo-authors' )->text() ) .
  76                                         Html::element( 'td', array(), $lang->formatNum( $pageInfo['authors'] ) ) .
  77                                         Html::element( 'td', array(), $lang->formatNum( $talkInfo['authors'] ) )
  78                         );
  79
  80                 if ( $userCanViewUnwatchedPages ) {
  81                         $content .= Html::rawElement( 'tr', array(),
  82                                 Html::element( 'th', array( 'colspan' => 3 ), $this->msg( 'pageinfo-header-watchlist' )->text() )
  83                         ) .
  84                                 Html::rawElement( 'tr', array(),
  85                                         Html::element( 'td', array(), $this->msg( 'pageinfo-watchers' )->text() ) .
  86                                                 Html::element( 'td', array( 'colspan' => 2 ), $lang->formatNum( $pageInfo['watchers'] ) )
  87                                 );
  88                 }
  89
  90                 if ( !$wgDisableCounters ) {
  91                         $content .= Html::rawElement( 'tr', array(),
  92                                 Html::element( 'th', array( 'colspan' => 3 ), $this->msg( 'pageinfo-header-views' )->text() )
  93                         ) .
  94                                 Html::rawElement( 'tr', array(),
  95                                         Html::element( 'td', array(), $this->msg( 'pageinfo-views' )->text() ) .
  96                                                 Html::element( 'td', array(), $lang->formatNum( $pageInfo['views'] ) ) .
  97                                                 Html::element( 'td', array(), $lang->formatNum( $talkInfo['views'] ) )
  98                                 ) .
  99                                 Html::rawElement( 'tr', array(),
 100                                         Html::element( 'td', array(), $this->msg( 'pageinfo-viewsperedit' )->text() ) .
 101                                                 Html::element( 'td', array(), $lang->formatNum( sprintf( '%.2f', $pageInfo['edits'] ? $pageInfo['views'] / $pageInfo['edits'] : 0 ) ) ) .
 102                                                 Html::element( 'td', array(), $lang->formatNum( sprintf( '%.2f', $talkInfo['edits'] ? $talkInfo['views'] / $talkInfo['edits'] : 0 ) ) )
 103                                 );
 104                 }
 105                 return Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ), $content );
 106         }
 107
 108         /**
 109          * Return the total number of edits and number of unique editors
 110          * on a given page. If page does not exist, returns false.
 111          *
 112          * @param $title Title object
 113          * @param $canViewUnwatched bool
 114          * @param $disableCounter bool
 115          * @return array
 116          */
 117         public static function pageCountInfo( $title, $canViewUnwatched, $disableCounter ) {
 118                 wfProfileIn( __METHOD__ );
 119                 $id = $title->getArticleID();
 120                 $dbr = wfGetDB( DB_SLAVE );
 121
 122                 $result = array();
 123                 if ( $canViewUnwatched ) {
 124                         $watchers = (int)$dbr->selectField(
 125                                 'watchlist',
 126                                 'COUNT(*)',
 127                                 array(
 128                                         'wl_namespace' => $title->getNamespace(),
 129                                         'wl_title'     => $title->getDBkey(),
 130                                 ),
 131                                 __METHOD__
 132                         );
 133                         $result['watchers'] = $watchers;
 134                 }
 135
 136                 $edits = (int)$dbr->selectField(
 137                         'revision',
 138                         'COUNT(rev_page)',
 139                         array( 'rev_page' => $id ),
 140                         __METHOD__
 141                 );
 142                 $result['edits'] = $edits;
 143
 144                 $authors = (int)$dbr->selectField(
 145                         'revision',
 146                         'COUNT(DISTINCT rev_user_text)',
 147                         array( 'rev_page' => $id ),
 148                         __METHOD__
 149                 );
 150                 $result['authors'] = $authors;
 151
 152                 if ( !$disableCounter ) {
 153                         $views = (int)$dbr->selectField(
 154                                 'page',
 155                                 'page_counter',
 156                                 array( 'page_id' => $id ),
 157                                 __METHOD__
 158                         );
 159                         $result['views'] = $views;
 160                 }
 161
 162                 wfProfileOut( __METHOD__ );
 163                 return $result;
 164         }
 165 }