includes/specials/SpecialComparePages.php

   1 <?php
   2 /**
   3  * Implements Special:ComparePages
   4  *
   5  * Copyright © 2010 Derk-Jan Hartman <hartman@videolan.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  */
  25
  26 /**
  27  * Implements Special:ComparePages
  28  *
  29  * @ingroup SpecialPage
  30  */
  31 class SpecialComparePages extends SpecialPage {
  32
  33         // Stored objects
  34         protected $opts, $skin;
  35
  36         // Some internal settings
  37         protected $showNavigation = false;
  38
  39         public function __construct() {
  40                 parent::__construct( 'ComparePages' );
  41         }
  42
  43         protected function setup( $par ) {
  44                 global $wgRequest, $wgUser;
  45
  46                 // Options
  47                 $opts = new FormOptions();
  48                 $this->opts = $opts; // bind
  49                 $opts->add( 'page1', '' );
  50                 $opts->add( 'page2', '' );
  51                 $opts->add( 'rev1', '' );
  52                 $opts->add( 'rev2', '' );
  53                 $opts->add( 'action', '' );
  54
  55                 // Set values
  56                 $opts->fetchValuesFromRequest( $wgRequest );
  57
  58                 $title1 = Title::newFromText( $opts->getValue( 'page1' ) );
  59                 $title2 = Title::newFromText( $opts->getValue( 'page2' ) );
  60
  61                 if( $title1 && $title1->exists() && $opts->getValue( 'rev1' ) == '' ) {
  62                         $pda = new Article( $title1 );
  63                         $pdi = $pda->getID();
  64                         $pdLastRevision = Revision::loadFromPageId( wfGetDB( DB_SLAVE ), $pdi );
  65                         $opts->setValue( 'rev1', $pdLastRevision->getId() );
  66                 } elseif ( $opts->getValue( 'rev1' ) != '' ) {
  67                         $pdrev = Revision::newFromId( $opts->getValue( 'rev1' ) );
  68                         if( $pdrev ) $opts->setValue( 'page1', $pdrev->getTitle()->getPrefixedText() );
  69                 }
  70                 if( $title2 && $title2->exists() && $opts->getValue( 'rev2' ) == '' ) {
  71                         $pda = new Article( $title2 );
  72                         $pdi = $pda->getID();
  73                         $pdLastRevision = Revision::loadFromPageId( wfGetDB( DB_SLAVE ), $pdi );
  74                         $opts->setValue('rev2', $pdLastRevision->getId() );
  75                 } elseif ( $opts->getValue( 'rev2' ) != '' ) {
  76                         $pdrev = Revision::newFromId( $opts->getValue( 'rev2' ) );
  77                         if( $pdrev ) $opts->setValue( 'page2', $pdrev->getTitle()->getPrefixedText() );
  78                 }
  79
  80                 // Store some objects
  81                 $this->skin = $wgUser->getSkin();
  82         }
  83
  84         /**
  85          * Show a form for filtering namespace and username
  86          *
  87          * @param $par String
  88          * @return String
  89          */
  90         public function execute( $par ) {
  91                 $this->setHeaders();
  92                 $this->outputHeader();
  93
  94                 $this->setup( $par );
  95
  96                 // Settings
  97                 $this->form();
  98
  99                 if( $this->opts->getValue( 'rev1' ) && $this->opts->getValue( 'rev2' ) ) {
 100                         $de = new DifferenceEngine( null,
 101                                 $this->opts->getValue( 'rev1' ),
 102                                 $this->opts->getValue( 'rev2' ),
 103                                 null, // rcid
 104                                 ( $this->opts->getValue( 'action' ) == 'purge' ),
 105                                 false );
 106                         $de->showDiffPage( true );
 107                 }
 108         }
 109
 110         protected function form() {
 111                 global $wgOut, $wgScript;
 112
 113                 // Consume values
 114                 $page1 = $this->opts->consumeValue( 'page1' );
 115                 $page2 = $this->opts->consumeValue( 'page2' );
 116                 $rev1 = $this->opts->consumeValue( 'rev1' );
 117                 $rev2 = $this->opts->consumeValue( 'rev2' );
 118
 119                 // Store query values in hidden fields so that form submission doesn't lose them
 120                 $hidden = array();
 121                 foreach ( $this->opts->getUnconsumedValues() as $key => $value ) {
 122                         $hidden[] = Html::hidden( $key, $value );
 123                 }
 124                 $hidden = implode( "\n", $hidden );
 125
 126                 $form = Html::openElement( 'form', array( 'action' => $wgScript ) ) .
 127                         Html::hidden( 'title', $this->getTitle()->getPrefixedDBkey() ) .
 128                         Xml::fieldset( wfMsg( 'compare-selector' ) ) .
 129                         Html::openElement( 'table', array( 'id' => 'mw-diff-table', 'style' => 'width:100%' ) ) .
 130                         "<tr>
 131                                 <td class='mw-label' style='width:10%'>" .
 132                                         Html::element( 'label', array( 'for' => 'page1' ), wfMsg( 'compare-page1' ) ) .
 133                                 "</td>
 134                                 <td class='mw-input' style='width:40%'>" .
 135                                         Html::input( 'page1', $page1, 'text', array( 'size' => 40, 'id' => 'page1' ) ) .
 136                                 "</td>
 137                                 <td class='mw-label' style='width:10%'>" .
 138                                         Html::element( 'label', array( 'for' => 'page2' ), wfMsg( 'compare-page2' ) ) .
 139                                 "</td>
 140                                 <td class='mw-input' style='width:40%'>" .
 141                                         Html::input( 'page2', $page2, 'text', array( 'size' => 40, 'id' => 'page2' ) ) .
 142                                 "</td>
 143                         </tr>" .
 144                         "<tr>
 145                                 <td class='mw-label'>" .
 146                                         Html::element( 'label', array( 'for' => 'rev1' ), wfMsg( 'compare-rev1' ) ) .
 147                                 "</td>
 148                                 <td class='mw-input'>" .
 149                                         Html::input( 'rev1', $rev1, 'text', array( 'size' => 8, 'id' => 'rev1' ) ) .
 150                                 "</td>
 151                                 <td class='mw-label'>" .
 152                                         Html::element( 'label', array( 'for' => 'rev2' ), wfMsg( 'compare-rev2' ) ) .
 153                                 "</td>
 154                                 <td class='mw-input'>" .
 155                                         Html::input( 'rev2', $rev2, 'text', array( 'size' => 8, 'id' => 'rev2' ) ) .
 156                                 "</td>
 157                         </tr>" .
 158                         "<tr> <td></td>
 159                                 <td class='mw-submit' colspan='3'>" .
 160                                         Xml::submitButton( wfMsg( 'compare-submit' ) ) .
 161                                 "</td>
 162                         </tr>" .
 163                         Html::closeElement( 'table' ) .
 164                         Html::closeElement( 'fieldset' ) .
 165                         $hidden .
 166                         Html::closeElement( 'form' );
 167
 168                 $wgOut->addHTML( $form );
 169         }
 170 }