includes/actions/RollbackAction.php

   1 <?php
   2 /**
   3  * Edit rollback 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  */
  22
  23 /**
  24  * User interface for the rollback action
  25  *
  26  * @ingroup Actions
  27  */
  28 class RollbackAction extends FormlessAction {
  29
  30         public function getName() {
  31                 return 'rollback';
  32         }
  33
  34         public function getRestriction() {
  35                 return 'rollback';
  36         }
  37
  38         /**
  39          * Temporarily unused message keys due to T88044/T136375:
  40          * - confirm-rollback-top
  41          * - confirm-rollback-button
  42          * - rollbackfailed
  43          * - rollback-missingparam
  44          */
  45
  46         /**
  47          * @throws ErrorPageError
  48          */
  49         public function onView() {
  50                 // TODO: use $this->useTransactionalTimeLimit(); when POST only
  51                 wfTransactionalTimeLimit();
  52
  53                 $request = $this->getRequest();
  54                 $user = $this->getUser();
  55                 $from = $request->getVal( 'from' );
  56                 $rev = $this->page->getRevision();
  57                 if ( $from === null || $from === '' ) {
  58                         throw new ErrorPageError( 'rollbackfailed', 'rollback-missingparam' );
  59                 }
  60                 if ( $from !== $rev->getUserText() ) {
  61                         throw new ErrorPageError( 'rollbackfailed', 'alreadyrolled', [
  62                                 $this->getTitle()->getPrefixedText(),
  63                                 $from,
  64                                 $rev->getUserText()
  65                         ] );
  66                 }
  67
  68                 $data = null;
  69                 $errors = $this->page->doRollback(
  70                         $from,
  71                         $request->getText( 'summary' ),
  72                         $request->getVal( 'token' ),
  73                         $request->getBool( 'bot' ),
  74                         $data,
  75                         $this->getUser()
  76                 );
  77
  78                 if ( in_array( [ 'actionthrottledtext' ], $errors ) ) {
  79                         throw new ThrottledError;
  80                 }
  81
  82                 if ( isset( $errors[0][0] ) &&
  83                         ( $errors[0][0] == 'alreadyrolled' || $errors[0][0] == 'cantrollback' )
  84                 ) {
  85                         $this->getOutput()->setPageTitle( $this->msg( 'rollbackfailed' ) );
  86                         $errArray = $errors[0];
  87                         $errMsg = array_shift( $errArray );
  88                         $this->getOutput()->addWikiMsgArray( $errMsg, $errArray );
  89
  90                         if ( isset( $data['current'] ) ) {
  91                                 /** @var Revision $current */
  92                                 $current = $data['current'];
  93
  94                                 if ( $current->getComment() != '' ) {
  95                                         $this->getOutput()->addHTML( $this->msg( 'editcomment' )->rawParams(
  96                                                 Linker::formatComment( $current->getComment() ) )->parse() );
  97                                 }
  98                         }
  99
 100                         return;
 101                 }
 102
 103                 # NOTE: Permission errors already handled by Action::checkExecute.
 104                 if ( $errors == [ [ 'readonlytext' ] ] ) {
 105                         throw new ReadOnlyError;
 106                 }
 107
 108                 # XXX: Would be nice if ErrorPageError could take multiple errors, and/or a status object.
 109                 #      Right now, we only show the first error
 110                 foreach ( $errors as $error ) {
 111                         throw new ErrorPageError( 'rollbackfailed', $error[0], array_slice( $error, 1 ) );
 112                 }
 113
 114                 /** @var Revision $current */
 115                 $current = $data['current'];
 116                 $target = $data['target'];
 117                 $newId = $data['newid'];
 118                 $this->getOutput()->setPageTitle( $this->msg( 'actioncomplete' ) );
 119                 $this->getOutput()->setRobotPolicy( 'noindex,nofollow' );
 120
 121                 $old = Linker::revUserTools( $current );
 122                 $new = Linker::revUserTools( $target );
 123                 $this->getOutput()->addHTML( $this->msg( 'rollback-success' )->rawParams( $old, $new )
 124                         ->parseAsBlock() );
 125
 126                 if ( $user->getBoolOption( 'watchrollback' ) ) {
 127                         $user->addWatch( $this->page->getTitle(), User::IGNORE_USER_RIGHTS );
 128                 }
 129
 130                 $this->getOutput()->returnToMain( false, $this->getTitle() );
 131
 132                 if ( !$request->getBool( 'hidediff', false ) &&
 133                         !$this->getUser()->getBoolOption( 'norollbackdiff' )
 134                 ) {
 135                         $contentHandler = $current->getContentHandler();
 136                         $de = $contentHandler->createDifferenceEngine(
 137                                 $this->getContext(),
 138                                 $current->getId(),
 139                                 $newId,
 140                                 false,
 141                                 true
 142                         );
 143                         $de->showDiff( '', '' );
 144                 }
 145                 return;
 146         }
 147
 148         protected function getDescription() {
 149                 return '';
 150         }
 151
 152         public function doesWrites() {
 153                 return true;
 154         }
 155 }