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 Actions
  21  * @ingroup Media
  22  * @author Alexandre Emsenhuber
  23  * @author Rob Church <robchur@gmail.com>
  24  */
  25
  26 /**
  27  * File reversion user interface
  28  *
  29  * @ingroup Actions
  30  */
  31 class RevertAction extends FormAction {
  32         /**
  33          * @var OldLocalFile
  34          */
  35         protected $oldFile;
  36
  37         public function getName() {
  38                 return 'revert';
  39         }
  40
  41         public function getRestriction() {
  42                 return 'upload';
  43         }
  44
  45         protected function checkCanExecute( User $user ) {
  46                 if ( $this->getTitle()->getNamespace() !== NS_FILE ) {
  47                         throw new ErrorPageError( $this->msg( 'nosuchaction' ), $this->msg( 'nosuchactiontext' ) );
  48                 }
  49                 parent::checkCanExecute( $user );
  50
  51                 $oldimage = $this->getRequest()->getText( 'oldimage' );
  52                 if ( strlen( $oldimage ) < 16
  53                         || strpos( $oldimage, '/' ) !== false
  54                         || strpos( $oldimage, '\\' ) !== false
  55                 ) {
  56                         throw new ErrorPageError( 'internalerror', 'unexpected', [ 'oldimage', $oldimage ] );
  57                 }
  58
  59                 $this->oldFile = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName(
  60                         $this->getTitle(),
  61                         $oldimage
  62                 );
  63
  64                 if ( !$this->oldFile->exists() ) {
  65                         throw new ErrorPageError( '', 'filerevert-badversion' );
  66                 }
  67         }
  68
  69         protected function alterForm( HTMLForm $form ) {
  70                 $form->setWrapperLegendMsg( 'filerevert-legend' );
  71                 $form->setSubmitTextMsg( 'filerevert-submit' );
  72                 $form->addHiddenField( 'oldimage', $this->getRequest()->getText( 'oldimage' ) );
  73                 $form->setTokenSalt( [ 'revert', $this->getTitle()->getPrefixedDBkey() ] );
  74         }
  75
  76         protected function getFormFields() {
  77                 global $wgContLang;
  78
  79                 $timestamp = $this->oldFile->getTimestamp();
  80
  81                 $user = $this->getUser();
  82                 $lang = $this->getLanguage();
  83                 $userDate = $lang->userDate( $timestamp, $user );
  84                 $userTime = $lang->userTime( $timestamp, $user );
  85                 $siteTs = MWTimestamp::getLocalInstance( $timestamp );
  86                 $ts = $siteTs->format( 'YmdHis' );
  87                 $siteDate = $wgContLang->date( $ts, false, false );
  88                 $siteTime = $wgContLang->time( $ts, false, false );
  89                 $tzMsg = $siteTs->getTimezoneMessage()->inContentLanguage()->text();
  90
  91                 return [
  92                         'intro' => [
  93                                 'type' => 'info',
  94                                 'vertical-label' => true,
  95                                 'raw' => true,
  96                                 'default' => $this->msg( 'filerevert-intro',
  97                                         $this->getTitle()->getText(), $userDate, $userTime,
  98                                         wfExpandUrl(
  99                                                 $this->page->getFile()->getArchiveUrl( $this->getRequest()->getText( 'oldimage' ) ),
 100                                                 PROTO_CURRENT
 101                                         ) )->parseAsBlock()
 102                         ],
 103                         'comment' => [
 104                                 'type' => 'text',
 105                                 'label-message' => 'filerevert-comment',
 106                                 'default' => $this->msg( 'filerevert-defaultcomment', $siteDate, $siteTime,
 107                                         $tzMsg )->inContentLanguage()->text()
 108                         ]
 109                 ];
 110         }
 111
 112         public function onSubmit( $data ) {
 113                 $this->useTransactionalTimeLimit();
 114
 115                 $old = $this->getRequest()->getText( 'oldimage' );
 116                 $localFile = $this->page->getFile();
 117                 $oldFile = OldLocalFile::newFromArchiveName( $this->getTitle(), $localFile->getRepo(), $old );
 118
 119                 $source = $localFile->getArchiveVirtualUrl( $old );
 120                 $comment = $data['comment'];
 121
 122                 if ( $localFile->getSha1() === $oldFile->getSha1() ) {
 123                         return Status::newFatal( 'filerevert-identical' );
 124                 }
 125
 126                 // TODO: Preserve file properties from database instead of reloading from file
 127                 return $localFile->upload(
 128                         $source,
 129                         $comment,
 130                         $comment,
 131                         0,
 132                         false,
 133                         false,
 134                         $this->getUser()
 135                 );
 136         }
 137
 138         public function onSuccess() {
 139                 $timestamp = $this->oldFile->getTimestamp();
 140                 $user = $this->getUser();
 141                 $lang = $this->getLanguage();
 142                 $userDate = $lang->userDate( $timestamp, $user );
 143                 $userTime = $lang->userTime( $timestamp, $user );
 144
 145                 $this->getOutput()->addWikiMsg( 'filerevert-success', $this->getTitle()->getText(),
 146                         $userDate, $userTime,
 147                         wfExpandUrl( $this->page->getFile()->getArchiveUrl( $this->getRequest()->getText( 'oldimage' ) ),
 148                                 PROTO_CURRENT
 149                 ) );
 150                 $this->getOutput()->returnToMain( false, $this->getTitle() );
 151         }
 152
 153         protected function getPageTitle() {
 154                 return $this->msg( 'filerevert', $this->getTitle()->getText() );
 155         }
 156
 157         protected function getDescription() {
 158                 return OutputPage::buildBacklinkSubtitle( $this->getTitle() );
 159         }
 160
 161         public function doesWrites() {
 162                 return true;
 163         }
 164 }