ApiMove.php

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<?php
use MediaWiki\MediaWikiServices;

class ApiMove extends ApiBase {

    public function execute() {
        $this->useTransactionalTimeLimit();

        $user = $this->getUser();
        $params = $this->extractRequestParams();

        $this->requireOnlyOneParameter( $params, 'from', 'fromid' );

        if ( isset( $params['from'] ) ) {
            $fromTitle = Title::newFromText( $params['from'] );
            if ( !$fromTitle || $fromTitle->isExternal() ) {
                $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['from'] ) ] );
            }
        } elseif ( isset( $params['fromid'] ) ) {
            $fromTitle = Title::newFromID( $params['fromid'] );
            if ( !$fromTitle ) {
                $this->dieWithError( [ 'apierror-nosuchpageid', $params['fromid'] ] );
            }
        }

        if ( !$fromTitle->exists() ) {
            $this->dieWithError( 'apierror-missingtitle' );
        }
        $fromTalk = $fromTitle->getTalkPage();

        $toTitle = Title::newFromText( $params['to'] );
        if ( !$toTitle || $toTitle->isExternal() ) {
            $this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['to'] ) ] );
        }
        $toTalk = $toTitle->getTalkPageIfDefined();

        if ( $toTitle->getNamespace() == NS_FILE
            && !RepoGroup::singleton()->getLocalRepo()->findFile( $toTitle )
            && MediaWikiServices::getInstance()->getRepoGroup()->findFile( $toTitle )
        ) {
            if ( !$params['ignorewarnings'] && $user->isAllowed( 'reupload-shared' ) ) {
                $this->dieWithError( 'apierror-fileexists-sharedrepo-perm' );
            } elseif ( !$user->isAllowed( 'reupload-shared' ) ) {
                $this->dieWithError( 'apierror-cantoverwrite-sharedfile' );
            }
        }

        // Rate limit
        if ( $user->pingLimiter( 'move' ) ) {
            $this->dieWithError( 'apierror-ratelimited' );
        }

        // Check if the user is allowed to add the specified changetags
        if ( $params['tags'] ) {
            $ableToTag = ChangeTags::canAddTagsAccompanyingChange( $params['tags'], $user );
            if ( !$ableToTag->isOK() ) {
                $this->dieStatus( $ableToTag );
            }
        }

        // Move the page
        $toTitleExists = $toTitle->exists();
        $status = $this->movePage( $fromTitle, $toTitle, $params['reason'], !$params['noredirect'],
            $params['tags'] ?: [] );
        if ( !$status->isOK() ) {
            $user->spreadAnyEditBlock();
            $this->dieStatus( $status );
        }

        $r = [
            'from' => $fromTitle->getPrefixedText(),
            'to' => $toTitle->getPrefixedText(),
            'reason' => $params['reason']
        ];

        // NOTE: we assume that if the old title exists, it's because it was re-created as
        // a redirect to the new title. This is not safe, but what we did before was
        // even worse: we just determined whether a redirect should have been created,
        // and reported that it was created if it should have, without any checks.
        $r['redirectcreated'] = $fromTitle->exists();

        $r['moveoverredirect'] = $toTitleExists;

        // Move the talk page
        if ( $params['movetalk'] && $toTalk && $fromTalk->exists() && !$fromTitle->isTalkPage() ) {
            $toTalkExists = $toTalk->exists();
            $status = $this->movePage(
                $fromTalk,
                $toTalk,
                $params['reason'],
                !$params['noredirect'],
                $params['tags'] ?: []
            );
            if ( $status->isOK() ) {
                $r['talkfrom'] = $fromTalk->getPrefixedText();
                $r['talkto'] = $toTalk->getPrefixedText();
                $r['talkmoveoverredirect'] = $toTalkExists;
            } else {
                // We're not going to dieWithError() on failure, since we already changed something
                $r['talkmove-errors'] = $this->getErrorFormatter()->arrayFromStatus( $status );
            }
        }

        $result = $this->getResult();

        // Move subpages
        if ( $params['movesubpages'] ) {
            $r['subpages'] = $this->moveSubpages(
                $fromTitle,
                $toTitle,
                $params['reason'],
                $params['noredirect'],
                $params['tags'] ?: []
            );
            ApiResult::setIndexedTagName( $r['subpages'], 'subpage' );

            if ( $params['movetalk'] ) {
                $r['subpages-talk'] = $this->moveSubpages(
                    $fromTalk,
                    $toTalk,
                    $params['reason'],
                    $params['noredirect'],
                    $params['tags'] ?: []
                );
                ApiResult::setIndexedTagName( $r['subpages-talk'], 'subpage' );
            }
        }

        $watch = 'preferences';
        if ( isset( $params['watchlist'] ) ) {
            $watch = $params['watchlist'];
        }

        // Watch pages
        $this->setWatch( $watch, $fromTitle, 'watchmoves' );
        $this->setWatch( $watch, $toTitle, 'watchmoves' );

        $result->addValue( null, $this->getModuleName(), $r );
    }

    protected function movePage( Title $from, Title $to, $reason, $createRedirect, $changeTags ) {
        $mp = new MovePage( $from, $to );
        $valid = $mp->isValidMove();
        if ( !$valid->isOK() ) {
            return $valid;
        }

        $user = $this->getUser();
        $permStatus = $mp->checkPermissions( $user, $reason );
        if ( !$permStatus->isOK() ) {
            return $permStatus;
        }

        // Check suppressredirect permission
        if ( !$user->isAllowed( 'suppressredirect' ) ) {
            $createRedirect = true;
        }

        return $mp->move( $user, $reason, $createRedirect, $changeTags );
    }

    public function moveSubpages( $fromTitle, $toTitle, $reason, $noredirect, $changeTags = [] ) {
        $retval = [];

        $mp = new MovePage( $fromTitle, $toTitle );
        $result =
            $mp->moveSubpagesIfAllowed( $this->getUser(), $reason, !$noredirect, $changeTags );
        if ( !$result->isOk() ) {
            // This means the whole thing failed
            return [ 'errors' => $this->getErrorFormatter()->arrayFromStatus( $result ) ];
        }

        // At least some pages could be moved
        // Report each of them separately
        foreach ( $result->getValue() as $oldTitle => $status ) {
            $r = [ 'from' => $oldTitle ];
            if ( $status->isOK() ) {
                $r['to'] = $status->getValue();
            } else {
                $r['errors'] = $this->getErrorFormatter()->arrayFromStatus( $status );
            }
            $retval[] = $r;
        }

        return $retval;
    }

    public function mustBePosted() {
        return true;
    }

    public function isWriteMode() {
        return true;
    }

    public function getAllowedParams() {
        return [
            'from' => null,
            'fromid' => [
                ApiBase::PARAM_TYPE => 'integer'
            ],
            'to' => [
                ApiBase::PARAM_TYPE => 'string',
                ApiBase::PARAM_REQUIRED => true
            ],
            'reason' => '',
            'movetalk' => false,
            'movesubpages' => false,
            'noredirect' => false,
            'watchlist' => [
                ApiBase::PARAM_DFLT => 'preferences',
                ApiBase::PARAM_TYPE => [
                    'watch',
                    'unwatch',
                    'preferences',
                    'nochange'
                ],
            ],
            'ignorewarnings' => false,
            'tags' => [
                ApiBase::PARAM_TYPE => 'tags',
                ApiBase::PARAM_ISMULTI => true,
            ],
        ];
    }

    public function needsToken() {
        return 'csrf';
    }

    protected function getExamplesMessages() {
        return [
            'action=move&from=Badtitle&to=Goodtitle&token=123ABC&' .
                'reason=Misspelled%20title&movetalk=&noredirect='
                => 'apihelp-move-example-move',
        ];
    }

    public function getHelpUrls() {
        return 'https://www.mediawiki.org/wiki/Special:MyLanguage/API:Move';
    }
}