ApiRollback.php

Go to the documentation of this file.

<?php
class ApiRollback extends ApiBase {
 
    private $mTitleObj = null;
 
    private $mUser = null;
 
    public function execute() {
        $this->useTransactionalTimeLimit();
 
        $user = $this->getUser();
        $params = $this->extractRequestParams();
 
        $titleObj = $this->getRbTitle( $params );
        $pageObj = WikiPage::factory( $titleObj );
        $summary = $params['summary'];
        $details = [];
 
        // If change tagging was requested, check that the user is allowed to tag,
        // and the tags are valid
        if ( $params['tags'] ) {
            $tagStatus = ChangeTags::canAddTagsAccompanyingChange( $params['tags'], $user );
            if ( !$tagStatus->isOK() ) {
                $this->dieStatus( $tagStatus );
            }
        }
 
        // @TODO: remove this hack once rollback uses POST (T88044)
        $fname = __METHOD__;
        $trxLimits = $this->getConfig()->get( 'TrxProfilerLimits' );
        $trxProfiler = Profiler::instance()->getTransactionProfiler();
        $trxProfiler->redefineExpectations( $trxLimits['POST'], $fname );
        DeferredUpdates::addCallableUpdate( function () use ( $trxProfiler, $trxLimits, $fname ) {
            $trxProfiler->redefineExpectations( $trxLimits['PostSend-POST'], $fname );
        } );
 
        $retval = $pageObj->doRollback(
            $this->getRbUser( $params ),
            $summary,
            $params['token'],
            $params['markbot'],
            $details,
            $user,
            $params['tags']
        );
 
        if ( $retval ) {
            $this->dieStatus( $this->errorArrayToStatus( $retval, $user ) );
        }
 
        $watch = $params['watchlist'] ?? 'preferences';
 
        // Watch pages
        $this->setWatch( $watch, $titleObj, 'watchrollback' );
 
        $info = [
            'title' => $titleObj->getPrefixedText(),
            'pageid' => (int)$details['current']->getPage(),
            'summary' => $details['summary'],
            'revid' => (int)$details['newid'],
            // The revision being reverted (previously the current revision of the page)
            'old_revid' => (int)$details['current']->getID(),
            // The revision being restored (the last revision before revision(s) by the reverted user)
            'last_revid' => (int)$details['target']->getID()
        ];
 
        $this->getResult()->addValue( null, $this->getModuleName(), $info );
    }
 
    public function mustBePosted() {
        return true;
    }
 
    public function isWriteMode() {
        return true;
    }
 
    public function getAllowedParams() {
        return [
            'title' => null,
            'pageid' => [
                ApiBase::PARAM_TYPE => 'integer'
            ],
            'tags' => [
                ApiBase::PARAM_TYPE => 'tags',
                ApiBase::PARAM_ISMULTI => true,
            ],
            'user' => [
                ApiBase::PARAM_TYPE => 'user',
                ApiBase::PARAM_REQUIRED => true
            ],
            'summary' => '',
            'markbot' => false,
            'watchlist' => [
                ApiBase::PARAM_DFLT => 'preferences',
                ApiBase::PARAM_TYPE => [
                    'watch',
                    'unwatch',
                    'preferences',
                    'nochange'
                ],
            ],
            'token' => [
                // Standard definition automatically inserted
                ApiBase::PARAM_HELP_MSG_APPEND => [ 'api-help-param-token-webui' ],
            ],
        ];
    }
 
    public function needsToken() {
        return 'rollback';
    }
 
    private function getRbUser( array $params ) {
        if ( $this->mUser !== null ) {
            return $this->mUser;
        }
 
        // We need to be able to revert IPs, but getCanonicalName rejects them
        $this->mUser = User::isIP( $params['user'] )
            ? $params['user']
            : User::getCanonicalName( $params['user'] );
        if ( !$this->mUser ) {
            $this->dieWithError( [ 'apierror-invaliduser', wfEscapeWikiText( $params['user'] ) ] );
        }
 
        return $this->mUser;
    }
 
    private function getRbTitle( array $params ) {
        if ( $this->mTitleObj !== null ) {
            return $this->mTitleObj;
        }
 
        $this->requireOnlyOneParameter( $params, 'title', 'pageid' );
 
        if ( isset( $params['title'] ) ) {
            $this->mTitleObj = Title::newFromText( $params['title'] );
            if ( !$this->mTitleObj || $this->mTitleObj->isExternal() ) {
                $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['title'] ) ] );
            }
        } elseif ( isset( $params['pageid'] ) ) {
            $this->mTitleObj = Title::newFromID( $params['pageid'] );
            if ( !$this->mTitleObj ) {
                $this->dieWithError( [ 'apierror-nosuchpageid', $params['pageid'] ] );
            }
        }
 
        if ( !$this->mTitleObj->exists() ) {
            $this->dieWithError( 'apierror-missingtitle' );
        }
 
        return $this->mTitleObj;
    }
 
    protected function getExamplesMessages() {
        return [
            'action=rollback&title=Main%20Page&user=Example&token=123ABC' =>
                'apihelp-rollback-example-simple',
            'action=rollback&title=Main%20Page&user=192.0.2.5&' .
                'token=123ABC&summary=Reverting%20vandalism&markbot=1' =>
                'apihelp-rollback-example-summary',
        ];
    }
 
    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Rollback';
    }
}