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<?php
/**
* Edit rollback user interface
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*
* @file
* @ingroup Actions
*/
namespace MediaWiki\Actions;
use MediaWiki\CommentFormatter\CommentFormatter;
use MediaWiki\Config\ConfigException;
use MediaWiki\Content\IContentHandlerFactory;
use MediaWiki\Context\IContextSource;
use MediaWiki\Deferred\DeferredUpdates;
use MediaWiki\Exception\BadRequestError;
use MediaWiki\Exception\ErrorPageError;
use MediaWiki\Exception\ReadOnlyError;
use MediaWiki\Exception\ThrottledError;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Linker\Linker;
use MediaWiki\MainConfigNames;
use MediaWiki\MediaWikiServices;
use MediaWiki\Message\Message;
use MediaWiki\Page\Article;
use MediaWiki\Page\RollbackPageFactory;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\User\Options\UserOptionsLookup;
use MediaWiki\Watchlist\WatchlistManager;
use Profiler;
/**
* User interface for the rollback action
*
* @ingroup Actions
*/
class RollbackAction extends FormAction {
private IContentHandlerFactory $contentHandlerFactory;
private RollbackPageFactory $rollbackPageFactory;
private UserOptionsLookup $userOptionsLookup;
private WatchlistManager $watchlistManager;
private CommentFormatter $commentFormatter;
/**
* @param Article $article
* @param IContextSource $context
* @param IContentHandlerFactory $contentHandlerFactory
* @param RollbackPageFactory $rollbackPageFactory
* @param UserOptionsLookup $userOptionsLookup
* @param WatchlistManager $watchlistManager
* @param CommentFormatter $commentFormatter
*/
public function __construct(
Article $article,
IContextSource $context,
IContentHandlerFactory $contentHandlerFactory,
RollbackPageFactory $rollbackPageFactory,
UserOptionsLookup $userOptionsLookup,
WatchlistManager $watchlistManager,
CommentFormatter $commentFormatter
) {
parent::__construct( $article, $context );
$this->contentHandlerFactory = $contentHandlerFactory;
$this->rollbackPageFactory = $rollbackPageFactory;
$this->userOptionsLookup = $userOptionsLookup;
$this->watchlistManager = $watchlistManager;
$this->commentFormatter = $commentFormatter;
}
public function getName() {
return 'rollback';
}
public function getRestriction() {
return 'rollback';
}
protected function usesOOUI() {
return true;
}
protected function getDescription() {
return '';
}
public function doesWrites() {
return true;
}
public function onSuccess() {
return false;
}
public function onSubmit( $data ) {
return false;
}
protected function alterForm( HTMLForm $form ) {
$form->setWrapperLegendMsg( 'confirm-rollback-top' );
$form->setSubmitTextMsg( 'confirm-rollback-button' );
$form->setTokenSalt( 'rollback' );
$from = $this->getRequest()->getVal( 'from' );
if ( $from === null ) {
throw new BadRequestError( 'rollbackfailed', 'rollback-missingparam' );
}
foreach ( [ 'from', 'bot', 'hidediff', 'summary', 'token' ] as $param ) {
$val = $this->getRequest()->getVal( $param );
if ( $val !== null ) {
$form->addHiddenField( $param, $val );
}
}
}
/**
* @throws ErrorPageError
* @throws ReadOnlyError
* @throws ThrottledError
*/
public function show() {
$this->setHeaders();
// This will throw exceptions if there's a problem
$this->checkCanExecute( $this->getUser() );
if ( !$this->userOptionsLookup->getOption( $this->getUser(), 'showrollbackconfirmation' ) ||
$this->getRequest()->wasPosted()
) {
$this->handleRollbackRequest();
} else {
$this->showRollbackConfirmationForm();
}
}
public function handleRollbackRequest() {
$this->enableTransactionalTimelimit();
$this->getOutput()->addModuleStyles( 'mediawiki.interface.helpers.styles' );
$request = $this->getRequest();
$user = $this->getUser();
$from = $request->getVal( 'from' );
$rev = $this->getWikiPage()->getRevisionRecord();
if ( $from === null ) {
throw new ErrorPageError( 'rollbackfailed', 'rollback-missingparam' );
}
if ( !$rev ) {
throw new ErrorPageError( 'rollbackfailed', 'rollback-missingrevision' );
}
$revUser = $rev->getUser();
$userText = $revUser ? $revUser->getName() : '';
if ( $from !== $userText ) {
throw new ErrorPageError( 'rollbackfailed', 'alreadyrolled', [
$this->getTitle()->getPrefixedText(),
wfEscapeWikiText( $from ),
$userText
] );
}
if ( !$user->matchEditToken( $request->getVal( 'token' ), 'rollback' ) ) {
throw new ErrorPageError( 'sessionfailure-title', 'sessionfailure' );
}
// The revision has the user suppressed, so the rollback has empty 'from',
// so the check above would succeed in that case.
// T307278 - Also check if the user has rights to view suppressed usernames
if ( !$revUser ) {
if ( $this->getAuthority()->isAllowedAny( 'suppressrevision', 'viewsuppressed' ) ) {
$revUser = $rev->getUser( RevisionRecord::RAW );
} else {
$userFactory = MediaWikiServices::getInstance()->getUserFactory();
$revUser = $userFactory->newFromName( $this->context->msg( 'rev-deleted-user' )->plain() );
}
}
$rollbackResult = $this->rollbackPageFactory
// @phan-suppress-next-line PhanTypeMismatchArgumentNullable use of raw avoids null here
->newRollbackPage( $this->getWikiPage(), $this->getAuthority(), $revUser )
->setSummary( $request->getText( 'summary' ) )
->markAsBot( $request->getBool( 'bot' ) )
->rollbackIfAllowed();
$data = $rollbackResult->getValue();
if ( $rollbackResult->hasMessage( 'actionthrottledtext' ) ) {
throw new ThrottledError;
}
# NOTE: Permission errors already handled by Action::checkExecute.
if ( $rollbackResult->hasMessage( 'readonlytext' ) ) {
throw new ReadOnlyError;
}
if ( $rollbackResult->getMessages() ) {
$this->getOutput()->setPageTitleMsg( $this->msg( 'rollbackfailed' ) );
foreach ( $rollbackResult->getMessages() as $msg ) {
$this->getOutput()->addWikiMsg( $msg );
}
if (
( $rollbackResult->hasMessage( 'alreadyrolled' ) || $rollbackResult->hasMessage( 'cantrollback' ) )
&& isset( $data['current-revision-record'] )
) {
/** @var RevisionRecord $current */
$current = $data['current-revision-record'];
if ( $current->getComment() != null ) {
$this->getOutput()->addWikiMsg(
'editcomment',
Message::rawParam(
$this->commentFormatter
->format( $current->getComment()->text )
)
);
}
}
return;
}
/** @var RevisionRecord $current */
$current = $data['current-revision-record'];
$target = $data['target-revision-record'];
$newId = $data['newid'];
$this->getOutput()->setPageTitleMsg( $this->msg( 'actioncomplete' ) );
$this->getOutput()->setRobotPolicy( 'noindex,nofollow' );
$old = Linker::revUserTools( $current );
$new = Linker::revUserTools( $target );
$currentUser = $current->getUser( RevisionRecord::FOR_THIS_USER, $user );
$targetUser = $target->getUser( RevisionRecord::FOR_THIS_USER, $user );
$this->getOutput()->addHTML(
$this->msg( 'rollback-success' )
->rawParams( $old, $new )
->params( $currentUser ? $currentUser->getName() : '' )
->params( $targetUser ? $targetUser->getName() : '' )
->parseAsBlock()
);
// Load the mediawiki.misc-authed-curate module, so that we can fire the JavaScript
// postEdit hook on a successful rollback.
$this->getOutput()->addModules( 'mediawiki.misc-authed-curate' );
// Export a success flag to the frontend, so that the mediawiki.misc-authed-curate
// ResourceLoader module can use this as an indicator to fire the postEdit hook.
$this->getOutput()->addJsConfigVars( [
'wgRollbackSuccess' => true,
// Don't show an edit confirmation with mw.notify(), the rollback success page
// is already a visual confirmation.
'wgPostEditConfirmationDisabled' => true,
] );
if ( $this->userOptionsLookup->getBoolOption( $user, 'watchrollback' ) ) {
$this->watchlistManager->addWatchIgnoringRights( $user, $this->getTitle() );
}
$this->getOutput()->returnToMain( false, $this->getTitle() );
if ( !$request->getBool( 'hidediff', false ) &&
!$this->userOptionsLookup->getBoolOption( $this->getUser(), 'norollbackdiff' )
) {
$contentModel = $current->getMainContentModel();
$contentHandler = $this->contentHandlerFactory->getContentHandler( $contentModel );
$de = $contentHandler->createDifferenceEngine(
$this->getContext(),
$current->getId(),
$newId,
0,
true
);
$de->showDiff( '', '' );
}
}
/**
* Enables transactional time limit for POST and GET requests to RollbackAction
* @throws ConfigException
*/
private function enableTransactionalTimelimit() {
// If Rollbacks are made POST-only, use $this->useTransactionalTimeLimit()
wfTransactionalTimeLimit();
if ( !$this->getRequest()->wasPosted() ) {
/**
* We apply the higher POST limits on GET requests
* to prevent logstash.wikimedia.org from being spammed
*/
$fname = __METHOD__;
$trxLimits = $this->context->getConfig()->get( MainConfigNames::TrxProfilerLimits );
$trxProfiler = Profiler::instance()->getTransactionProfiler();
$trxProfiler->redefineExpectations( $trxLimits['POST'], $fname );
DeferredUpdates::addCallableUpdate( static function () use ( $trxProfiler, $trxLimits, $fname
) {
$trxProfiler->redefineExpectations( $trxLimits['PostSend-POST'], $fname );
} );
}
}
private function showRollbackConfirmationForm() {
$form = $this->getForm();
if ( $form->show() ) {
$this->onSuccess();
}
}
protected function getFormFields() {
return [
'intro' => [
'type' => 'info',
'raw' => true,
'default' => $this->msg( 'confirm-rollback-bottom' )->parse()
]
];
}
}
/** @deprecated class alias since 1.44 */
class_alias( RollbackAction::class, 'RollbackAction' );