includes/actions/RevertAction.php

   1 <?php
   2 /**
   3  * File reversion user interface
   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
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  18  *
  19  * @file
  20  * @ingroup Action
  21  * @ingroup Media
  22  * @author Alexandre Emsenhuber
  23  * @author Rob Church <robchur@gmail.com>
  24  */
  25
  26 /**
  27  * Dummy class for pages not in NS_FILE
  28  *
  29  * @ingroup Action
  30  */
  31 class RevertAction extends Action {
  32
  33         public function getName() {
  34                 return 'revert';
  35         }
  36
  37         public function getRestriction() {
  38                 return 'read';
  39         }
  40
  41         public function show() {
  42                 $this->getOutput()->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
  43         }
  44
  45         public function execute() {}
  46 }
  47
  48 /**
  49  * Class for pages in NS_FILE
  50  *
  51  * @ingroup Action
  52  */
  53 class RevertFileAction extends FormAction {
  54         protected $oldFile;
  55
  56         public function getName() {
  57                 return 'revert';
  58         }
  59
  60         public function getRestriction() {
  61                 return 'upload';
  62         }
  63
  64         protected function checkCanExecute( User $user ) {
  65                 parent::checkCanExecute( $user );
  66
  67                 $oldimage = $this->getRequest()->getText( 'oldimage' );
  68                 if ( strlen( $oldimage ) < 16
  69                         || strpos( $oldimage, '/' ) !== false
  70                         || strpos( $oldimage, '\\' ) !== false )
  71                 {
  72                         throw new ErrorPageError( 'internalerror', 'unexpected', array( 'oldimage', $oldimage ) );
  73                 }
  74
  75                 $this->oldFile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $this->getTitle(), $oldimage );
  76                 if ( !$this->oldFile->exists() ) {
  77                         throw new ErrorPageError( '', 'filerevert-badversion' );
  78                 }
  79         }
  80
  81         protected function alterForm( HTMLForm $form ) {
  82                 $form->setWrapperLegend( wfMsgHtml( 'filerevert-legend' ) );
  83                 $form->setSubmitText( wfMsg( 'filerevert-submit' ) );
  84                 $form->addHiddenField( 'oldimage', $this->getRequest()->getText( 'oldimage' ) );
  85         }
  86
  87         protected function getFormFields() {
  88                 global $wgContLang;
  89
  90                 $timestamp = $this->oldFile->getTimestamp();
  91
  92                 return array(
  93                         'intro' => array(
  94                                 'type' => 'info',
  95                                 'vertical-label' => true,
  96                                 'raw' => true,
  97                                 'default' => wfMsgExt( 'filerevert-intro', 'parse', $this->getTitle()->getText(),
  98                                         $this->getLang()->date( $timestamp, true ), $this->getLang()->time( $timestamp, true ),
  99                                         wfExpandUrl( $this->page->getFile()->getArchiveUrl( $this->getRequest()->getText( 'oldimage' ) ) ) )
 100                         ),
 101                         'comment' => array(
 102                                 'type' => 'text',
 103                                 'label-message' => 'filerevert-comment',
 104                                 'default' => wfMsgForContent( 'filerevert-defaultcomment',
 105                                         $wgContLang->date( $timestamp, false, false ), $wgContLang->time( $timestamp, false, false ) ),
 106                         )
 107                 );
 108         }
 109
 110         public function onSubmit( $data ) {
 111                 $source = $this->page->getFile()->getArchiveVirtualUrl( $this->getRequest()->getText( 'oldimage' ) );
 112                 $comment = $data['comment'];
 113                 // TODO: Preserve file properties from database instead of reloading from file
 114                 return $this->page->getFile()->upload( $source, $comment, $comment );
 115         }
 116
 117         public function onSuccess() {
 118                 $timestamp = $this->oldFile->getTimestamp();
 119                 $this->getOutput()->addHTML( wfMsgExt( 'filerevert-success', 'parse', $this->getTitle()->getText(),
 120                         $this->getLang()->date( $timestamp, true ),
 121                         $this->getLang()->time( $timestamp, true ),
 122                         wfExpandUrl( $this->page->getFile()->getArchiveUrl( $this->getRequest()->getText( 'oldimage' ) ) ) ) );
 123                 $this->getOutput()->returnToMain( false, $this->getTitle() );
 124         }
 125
 126         protected function getPageTitle() {
 127                 return wfMsg( 'filerevert', $this->getTitle()->getText() );
 128         }
 129
 130         protected function getDescription() {
 131                 return wfMsg(
 132                         'filerevert-backlink',
 133                         Linker::linkKnown( $this->getTitle() )
 134                 );
 135         }
 136 }