MovePage.php

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<?php
namespace MediaWiki\Page;
 
use ChangeTags;
use File;
use LogFormatterFactory;
use ManualLogEntry;
use MediaWiki\Collation\CollationFactory;
use MediaWiki\CommentStore\CommentStoreComment;
use MediaWiki\Config\ServiceOptions;
use MediaWiki\Content\ContentHandler;
use MediaWiki\Content\IContentHandlerFactory;
use MediaWiki\Content\WikitextContent;
use MediaWiki\Context\RequestContext;
use MediaWiki\Deferred\AtomicSectionUpdate;
use MediaWiki\Deferred\DeferredUpdates;
use MediaWiki\EditPage\SpamChecker;
use MediaWiki\HookContainer\HookContainer;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\MainConfigNames;
use MediaWiki\Permissions\Authority;
use MediaWiki\Permissions\PermissionStatus;
use MediaWiki\Permissions\RestrictionStore;
use MediaWiki\Revision\RevisionStore;
use MediaWiki\Revision\SlotRecord;
use MediaWiki\Status\Status;
use MediaWiki\Storage\PageUpdatedEvent;
use MediaWiki\Storage\PageUpdaterFactory;
use MediaWiki\Title\NamespaceInfo;
use MediaWiki\Title\Title;
use MediaWiki\User\UserEditTracker;
use MediaWiki\User\UserFactory;
use MediaWiki\User\UserIdentity;
use MediaWiki\Watchlist\WatchedItemStoreInterface;
use RepoGroup;
use StringUtils;
use Wikimedia\NormalizedException\NormalizedException;
use Wikimedia\Rdbms\IConnectionProvider;
use Wikimedia\Rdbms\IDatabase;
use Wikimedia\Rdbms\IDBAccessObject;
use WikiPage;
 
class MovePage {
 
    protected Title $oldTitle;
    protected Title $newTitle;
    protected ServiceOptions $options;
    protected IConnectionProvider $dbProvider;
    protected NamespaceInfo $nsInfo;
    protected WatchedItemStoreInterface $watchedItems;
    protected RepoGroup $repoGroup;
    private IContentHandlerFactory $contentHandlerFactory;
    private RevisionStore $revisionStore;
    private SpamChecker $spamChecker;
    private HookRunner $hookRunner;
    private WikiPageFactory $wikiPageFactory;
    private UserFactory $userFactory;
    private UserEditTracker $userEditTracker;
    private MovePageFactory $movePageFactory;
    public CollationFactory $collationFactory;
    private PageUpdaterFactory $pageUpdaterFactory;
    private RestrictionStore $restrictionStore;
    private DeletePageFactory $deletePageFactory;
    private LogFormatterFactory $logFormatterFactory;
 
    private $maximumMovedPages;
 
    public const CONSTRUCTOR_OPTIONS = [
        MainConfigNames::CategoryCollation,
        MainConfigNames::MaximumMovedPages,
    ];
 
    public function __construct(
        Title $oldTitle,
        Title $newTitle,
        ServiceOptions $options,
        IConnectionProvider $dbProvider,
        NamespaceInfo $nsInfo,
        WatchedItemStoreInterface $watchedItems,
        RepoGroup $repoGroup,
        IContentHandlerFactory $contentHandlerFactory,
        RevisionStore $revisionStore,
        SpamChecker $spamChecker,
        HookContainer $hookContainer,
        WikiPageFactory $wikiPageFactory,
        UserFactory $userFactory,
        UserEditTracker $userEditTracker,
        MovePageFactory $movePageFactory,
        CollationFactory $collationFactory,
        PageUpdaterFactory $pageUpdaterFactory,
        RestrictionStore $restrictionStore,
        DeletePageFactory $deletePageFactory,
        LogFormatterFactory $logFormatterFactory
    ) {
        $this->oldTitle = $oldTitle;
        $this->newTitle = $newTitle;
 
        $this->options = $options;
        $this->dbProvider = $dbProvider;
        $this->nsInfo = $nsInfo;
        $this->watchedItems = $watchedItems;
        $this->repoGroup = $repoGroup;
        $this->contentHandlerFactory = $contentHandlerFactory;
        $this->revisionStore = $revisionStore;
        $this->spamChecker = $spamChecker;
        $this->hookRunner = new HookRunner( $hookContainer );
        $this->wikiPageFactory = $wikiPageFactory;
        $this->userFactory = $userFactory;
        $this->userEditTracker = $userEditTracker;
        $this->movePageFactory = $movePageFactory;
        $this->collationFactory = $collationFactory;
        $this->pageUpdaterFactory = $pageUpdaterFactory;
        $this->restrictionStore = $restrictionStore;
        $this->deletePageFactory = $deletePageFactory;
        $this->logFormatterFactory = $logFormatterFactory;
 
        $this->maximumMovedPages = $this->options->get( MainConfigNames::MaximumMovedPages );
    }
 
    public function setMaximumMovedPages( $max ) {
        $this->maximumMovedPages = $max;
    }
 
    private function authorizeInternal(
        callable $authorizer,
        Authority $performer,
        ?string $reason
    ): PermissionStatus {
        $status = PermissionStatus::newEmpty();
 
        $authorizer( 'move', $this->oldTitle, $status );
        $authorizer( 'edit', $this->oldTitle, $status );
        $authorizer( 'move-target', $this->newTitle, $status );
        $authorizer( 'edit', $this->newTitle, $status );
 
        if ( $reason !== null && $this->spamChecker->checkSummary( $reason ) !== false ) {
            // This is kind of lame, won't display nice
            $status->fatal( 'spamprotectiontext' );
        }
 
        $tp = $this->restrictionStore->getCreateProtection( $this->newTitle ) ?: false;
        if ( $tp !== false && !$performer->isAllowed( $tp['permission'] ) ) {
            $status->fatal( 'cantmove-titleprotected' );
        }
 
        // TODO: change hook signature to accept Authority and PermissionStatus
        $user = $this->userFactory->newFromAuthority( $performer );
        $status = Status::wrap( $status );
        $this->hookRunner->onMovePageCheckPermissions(
            $this->oldTitle, $this->newTitle, $user, $reason, $status );
        // TODO: remove conversion code after hook signature is changed.
        $permissionStatus = PermissionStatus::newEmpty();
        foreach ( $status->getMessages() as $msg ) {
            $permissionStatus->fatal( $msg );
        }
        return $permissionStatus;
    }
 
    public function probablyCanMove( Authority $performer, ?string $reason = null ): PermissionStatus {
        return $this->authorizeInternal(
            static function ( string $action, PageIdentity $target, PermissionStatus $status ) use ( $performer ) {
                return $performer->probablyCan( $action, $target, $status );
            },
            $performer,
            $reason
        );
    }
 
    public function authorizeMove( Authority $performer, ?string $reason = null ): PermissionStatus {
        return $this->authorizeInternal(
            static function ( string $action, PageIdentity $target, PermissionStatus $status ) use ( $performer ) {
                return $performer->authorizeWrite( $action, $target, $status );
            },
            $performer,
            $reason
        );
    }
 
    public function checkPermissions( Authority $performer, $reason ) {
        $permissionStatus = $this->authorizeInternal(
            static function ( string $action, PageIdentity $target, PermissionStatus $status ) use ( $performer ) {
                return $performer->definitelyCan( $action, $target, $status );
            },
            $performer,
            $reason
        );
        return Status::wrap( $permissionStatus );
    }
 
    public function isValidMove() {
        $status = new Status();
 
        if ( $this->oldTitle->equals( $this->newTitle ) ) {
            $status->fatal( 'selfmove' );
        } elseif ( $this->newTitle->getArticleID( IDBAccessObject::READ_LATEST /* T272386 */ )
            && !$this->isValidMoveTarget()
        ) {
            // The move is allowed only if (1) the target doesn't exist, or (2) the target is a
            // redirect to the source, and has no history (so we can undo bad moves right after
            // they're done). If the target is a single revision redirect to a different page,
            // it can be deleted with just `delete-redirect` rights (i.e. without needing
            // `delete`) - see T239277
            $fatal = $this->newTitle->isSingleRevRedirect() ? 'redirectexists' : 'articleexists';
            $status->fatal( $fatal, $this->newTitle->getPrefixedText() );
        }
 
        // @todo If the old title is invalid, maybe we should check if it somehow exists in the
        // database and allow moving it to a valid name? Why prohibit the move from an empty name
        // without checking in the database?
        if ( $this->oldTitle->getDBkey() == '' ) {
            $status->fatal( 'badarticleerror' );
        } elseif ( $this->oldTitle->isExternal() ) {
            $status->fatal( 'immobile-source-namespace-iw' );
        } elseif ( !$this->oldTitle->isMovable() ) {
            $nsText = $this->oldTitle->getNsText();
            if ( $nsText === '' ) {
                $nsText = wfMessage( 'blanknamespace' )->text();
            }
            $status->fatal( 'immobile-source-namespace', $nsText );
        } elseif ( !$this->oldTitle->exists() ) {
            $status->fatal( 'movepage-source-doesnt-exist', $this->oldTitle->getPrefixedText() );
        }
 
        if ( $this->newTitle->isExternal() ) {
            $status->fatal( 'immobile-target-namespace-iw' );
        } elseif ( !$this->newTitle->isMovable() ) {
            $nsText = $this->newTitle->getNsText();
            if ( $nsText === '' ) {
                $nsText = wfMessage( 'blanknamespace' )->text();
            }
            $status->fatal( 'immobile-target-namespace', $nsText );
        }
        if ( !$this->newTitle->isValid() ) {
            $status->fatal( 'movepage-invalid-target-title' );
        }
 
        // Content model checks
        if ( !$this->contentHandlerFactory
            ->getContentHandler( $this->oldTitle->getContentModel() )
            ->canBeUsedOn( $this->newTitle )
        ) {
            $status->fatal(
                'content-not-allowed-here',
                ContentHandler::getLocalizedName( $this->oldTitle->getContentModel() ),
                $this->newTitle->getPrefixedText(),
                SlotRecord::MAIN
            );
        }
 
        // Image-specific checks
        if ( $this->oldTitle->inNamespace( NS_FILE ) ) {
            $status->merge( $this->isValidFileMove() );
        }
 
        if ( $this->newTitle->inNamespace( NS_FILE ) && !$this->oldTitle->inNamespace( NS_FILE ) ) {
            $status->fatal( 'nonfile-cannot-move-to-file' );
        }
 
        // Hook for extensions to say a title can't be moved for technical reasons
        $this->hookRunner->onMovePageIsValidMove( $this->oldTitle, $this->newTitle, $status );
 
        return $status;
    }
 
    protected function isValidFileMove() {
        $status = new Status();
 
        if ( !$this->newTitle->inNamespace( NS_FILE ) ) {
            // No need for further errors about the target filename being wrong
            return $status->fatal( 'imagenocrossnamespace' );
        }
 
        $file = $this->repoGroup->getLocalRepo()->newFile( $this->oldTitle );
        $file->load( IDBAccessObject::READ_LATEST );
        if ( $file->exists() ) {
            if ( $this->newTitle->getText() != wfStripIllegalFilenameChars( $this->newTitle->getText() ) ) {
                $status->fatal( 'imageinvalidfilename' );
            }
            if ( strlen( $this->newTitle->getText() ) > 240 ) {
                $status->fatal( 'filename-toolong' );
            }
            if (
                !$this->repoGroup->getLocalRepo()->backendSupportsUnicodePaths() &&
                !preg_match( '/^[\x0-\x7f]*$/', $this->newTitle->getText() )
            ) {
                $status->fatal( 'windows-nonascii-filename' );
            }
            if ( strrpos( $this->newTitle->getText(), '.' ) === 0 ) {
                // Filename cannot only be its extension
                // Will probably fail the next check too.
                $status->fatal( 'filename-tooshort' );
            }
            if ( !File::checkExtensionCompatibility( $file, $this->newTitle->getDBkey() ) ) {
                $status->fatal( 'imagetypemismatch' );
            }
        }
 
        return $status;
    }
 
    protected function isValidMoveTarget() {
        # Is it an existing file?
        if ( $this->newTitle->inNamespace( NS_FILE ) ) {
            $file = $this->repoGroup->getLocalRepo()->newFile( $this->newTitle );
            $file->load( IDBAccessObject::READ_LATEST );
            if ( $file->exists() ) {
                wfDebug( __METHOD__ . ": file exists" );
                return false;
            }
        }
        # Is it a redirect with no history?
        if ( !$this->newTitle->isSingleRevRedirect() ) {
            wfDebug( __METHOD__ . ": not a one-rev redirect" );
            return false;
        }
        # Get the article text
        $rev = $this->revisionStore->getRevisionByTitle(
            $this->newTitle,
            0,
            IDBAccessObject::READ_LATEST
        );
        if ( !is_object( $rev ) ) {
            return false;
        }
        $content = $rev->getContent( SlotRecord::MAIN );
        # Does the redirect point to the source?
        # Or is it a broken self-redirect, usually caused by namespace collisions?
        $redirTitle = $content ? $content->getRedirectTarget() : null;
 
        if ( $redirTitle ) {
            if ( $redirTitle->getPrefixedDBkey() !== $this->oldTitle->getPrefixedDBkey() &&
                $redirTitle->getPrefixedDBkey() !== $this->newTitle->getPrefixedDBkey() ) {
                wfDebug( __METHOD__ . ": redirect points to other page" );
                return false;
            } else {
                return true;
            }
        } else {
            # Fail safe (not a redirect after all. strange.)
            wfDebug( __METHOD__ . ": failsafe: database says " . $this->newTitle->getPrefixedDBkey() .
                " is a redirect, but it doesn't contain a valid redirect." );
            return false;
        }
    }
 
    public function move(
        UserIdentity $user, $reason = null, $createRedirect = true, array $changeTags = []
    ) {
        $status = $this->isValidMove();
        if ( !$status->isOK() ) {
            return $status;
        }
 
        return $this->moveUnsafe( $user, $reason ?? '', $createRedirect, $changeTags );
    }
 
    public function moveIfAllowed(
        Authority $performer, $reason = null, $createRedirect = true, array $changeTags = []
    ) {
        $status = $this->isValidMove();
        $status->merge( $this->authorizeMove( $performer, $reason ) );
        if ( $changeTags ) {
            $status->merge( ChangeTags::canAddTagsAccompanyingChange( $changeTags, $performer ) );
        }
 
        if ( !$status->isOK() ) {
            // TODO: wrap block spreading into Authority side-effect?
            $user = $this->userFactory->newFromAuthority( $performer );
            // Auto-block user's IP if the account was "hard" blocked
            $user->spreadAnyEditBlock();
            return $status;
        }
 
        // Check suppressredirect permission
        if ( !$performer->isAllowed( 'suppressredirect' ) ) {
            $createRedirect = true;
        }
 
        return $this->moveUnsafe( $performer->getUser(), $reason ?? '', $createRedirect, $changeTags );
    }
 
    public function moveSubpages(
        UserIdentity $user, $reason = null, $createRedirect = true, array $changeTags = []
    ) {
        return $this->moveSubpagesInternal(
            function ( Title $oldSubpage, Title $newSubpage )
            use ( $user, $reason, $createRedirect, $changeTags ) {
                $mp = $this->movePageFactory->newMovePage( $oldSubpage, $newSubpage );
                return $mp->move( $user, $reason, $createRedirect, $changeTags );
            }
        );
    }
 
    public function moveSubpagesIfAllowed(
        Authority $performer, $reason = null, $createRedirect = true, array $changeTags = []
    ) {
        if ( !$performer->authorizeWrite( 'move-subpages', $this->oldTitle ) ) {
            return Status::newFatal( 'cant-move-subpages' );
        }
        return $this->moveSubpagesInternal(
            function ( Title $oldSubpage, Title $newSubpage )
            use ( $performer, $reason, $createRedirect, $changeTags ) {
                $mp = $this->movePageFactory->newMovePage( $oldSubpage, $newSubpage );
                return $mp->moveIfAllowed( $performer, $reason, $createRedirect, $changeTags );
            }
        );
    }
 
    private function moveSubpagesInternal( callable $subpageMoveCallback ) {
        // Do the source and target namespaces support subpages?
        if ( !$this->nsInfo->hasSubpages( $this->oldTitle->getNamespace() ) ) {
            return Status::newFatal( 'namespace-nosubpages',
                $this->nsInfo->getCanonicalName( $this->oldTitle->getNamespace() ) );
        }
        if ( !$this->nsInfo->hasSubpages( $this->newTitle->getNamespace() ) ) {
            return Status::newFatal( 'namespace-nosubpages',
                $this->nsInfo->getCanonicalName( $this->newTitle->getNamespace() ) );
        }
 
        // Return a status for the overall result. Its value will be an array with per-title
        // status for each subpage. Merge any errors from the per-title statuses into the
        // top-level status without resetting the overall result.
        $max = $this->maximumMovedPages;
        $topStatus = Status::newGood();
        $perTitleStatus = [];
        $subpages = $this->oldTitle->getSubpages( $max >= 0 ? $max + 1 : -1 );
        $count = 0;
        foreach ( $subpages as $oldSubpage ) {
            $count++;
            if ( $max >= 0 && $count > $max ) {
                $status = Status::newFatal( 'movepage-max-pages', $max );
                $perTitleStatus[$oldSubpage->getPrefixedText()] = $status;
                $topStatus->merge( $status );
                $topStatus->setOK( true );
                break;
            }
 
            // We don't know whether this function was called before or after moving the root page,
            // so check both titles
            if ( $oldSubpage->getArticleID() == $this->oldTitle->getArticleID() ||
                $oldSubpage->getArticleID() == $this->newTitle->getArticleID()
            ) {
                // When moving a page to a subpage of itself, don't move it twice
                continue;
            }
            $newPageName = preg_replace(
                    '#^' . preg_quote( $this->oldTitle->getDBkey(), '#' ) . '#',
                    StringUtils::escapeRegexReplacement( $this->newTitle->getDBkey() ), # T23234
                    $oldSubpage->getDBkey() );
            if ( $oldSubpage->isTalkPage() ) {
                $newNs = $this->nsInfo->getTalkPage( $this->newTitle )->getNamespace();
            } else {
                $newNs = $this->nsInfo->getSubjectPage( $this->newTitle )->getNamespace();
            }
            // T16385: we need makeTitleSafe because the new page names may be longer than 255
            // characters.
            $newSubpage = Title::makeTitleSafe( $newNs, $newPageName );
            $status = $subpageMoveCallback( $oldSubpage, $newSubpage );
            if ( $status->isOK() ) {
                $status->setResult( true, $newSubpage->getPrefixedText() );
            }
            $perTitleStatus[$oldSubpage->getPrefixedText()] = $status;
            $topStatus->merge( $status );
            $topStatus->setOK( true );
        }
 
        $topStatus->value = $perTitleStatus;
        return $topStatus;
    }
 
    private function moveUnsafe( UserIdentity $user, $reason, $createRedirect, array $changeTags ) {
        $status = Status::newGood();
 
        // TODO: make hooks accept UserIdentity
        $userObj = $this->userFactory->newFromUserIdentity( $user );
        $this->hookRunner->onTitleMove( $this->oldTitle, $this->newTitle, $userObj, $reason, $status );
        if ( !$status->isOK() ) {
            // Move was aborted by the hook
            return $status;
        }
 
        $dbw = $this->dbProvider->getPrimaryDatabase();
        $dbw->startAtomic( __METHOD__, IDatabase::ATOMIC_CANCELABLE );
 
        $this->hookRunner->onTitleMoveStarting( $this->oldTitle, $this->newTitle, $userObj );
 
        $pageid = $this->oldTitle->getArticleID( IDBAccessObject::READ_LATEST );
        $protected = $this->restrictionStore->isProtected( $this->oldTitle );
 
        // Attempt the actual move
        $moveAttemptResult = $this->moveToInternal( $user, $this->newTitle, $reason, $createRedirect,
            $changeTags );
 
        if ( !$moveAttemptResult->isGood() ) {
            // T265779: Attempt to delete target page failed
            $dbw->cancelAtomic( __METHOD__ );
            return $moveAttemptResult;
        } else {
            $nullRevision = $moveAttemptResult->getValue()['nullRevision'];
            '@phan-var \MediaWiki\Revision\RevisionRecord $nullRevision';
        }
 
        $redirid = $this->oldTitle->getArticleID();
 
        if ( $protected ) {
            # Protect the redirect title as the title used to be...
            $res = $dbw->newSelectQueryBuilder()
                ->select( [ 'pr_type', 'pr_level', 'pr_cascade', 'pr_expiry' ] )
                ->from( 'page_restrictions' )
                ->where( [ 'pr_page' => $pageid ] )
                ->forUpdate()
                ->caller( __METHOD__ )
                ->fetchResultSet();
            $rowsInsert = [];
            foreach ( $res as $row ) {
                $rowsInsert[] = [
                    'pr_page' => $redirid,
                    'pr_type' => $row->pr_type,
                    'pr_level' => $row->pr_level,
                    'pr_cascade' => $row->pr_cascade,
                    'pr_expiry' => $row->pr_expiry
                ];
            }
            $dbw->newInsertQueryBuilder()
                ->insertInto( 'page_restrictions' )
                ->ignore()
                ->rows( $rowsInsert )
                ->caller( __METHOD__ )->execute();
 
            // Build comment for log
            $comment = wfMessage(
                'prot_1movedto2',
                $this->oldTitle->getPrefixedText(),
                $this->newTitle->getPrefixedText()
            )->inContentLanguage()->text();
            if ( $reason ) {
                $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
            }
 
            // reread inserted pr_ids for log relation
            $logRelationsValues = $dbw->newSelectQueryBuilder()
                ->select( 'pr_id' )
                ->from( 'page_restrictions' )
                ->where( [ 'pr_page' => $redirid ] )
                ->caller( __METHOD__ )->fetchFieldValues();
 
            // Update the protection log
            $logEntry = new ManualLogEntry( 'protect', 'move_prot' );
            $logEntry->setTarget( $this->newTitle );
            $logEntry->setComment( $comment );
            $logEntry->setPerformer( $user );
            $logEntry->setParameters( [
                '4::oldtitle' => $this->oldTitle->getPrefixedText(),
            ] );
            $logEntry->setRelations( [ 'pr_id' => $logRelationsValues ] );
            $logEntry->addTags( $changeTags );
            $logId = $logEntry->insert();
            $logEntry->publish( $logId );
        }
 
        # Update watchlists
        $oldtitle = $this->oldTitle->getDBkey();
        $newtitle = $this->newTitle->getDBkey();
        $oldsnamespace = $this->nsInfo->getSubject( $this->oldTitle->getNamespace() );
        $newsnamespace = $this->nsInfo->getSubject( $this->newTitle->getNamespace() );
        if ( $oldsnamespace != $newsnamespace || $oldtitle != $newtitle ) {
            $this->watchedItems->duplicateAllAssociatedEntries( $this->oldTitle, $this->newTitle );
        }
 
        // If it is a file then move it last.
        // This is done after all database changes so that file system errors cancel the transaction.
        if ( $this->oldTitle->getNamespace() === NS_FILE ) {
            $status = $this->moveFile( $this->oldTitle, $this->newTitle );
            if ( !$status->isOK() ) {
                $dbw->cancelAtomic( __METHOD__ );
                return $status;
            }
        }
 
        $this->hookRunner->onPageMoveCompleting(
            $this->oldTitle, $this->newTitle,
            $user, $pageid, $redirid, $reason, $nullRevision
        );
 
        $dbw->endAtomic( __METHOD__ );
 
        // Keep each single hook handler atomic
        DeferredUpdates::addUpdate(
            new AtomicSectionUpdate(
                $dbw,
                __METHOD__,
                function () use ( $user, $pageid, $redirid, $reason, $nullRevision ) {
                    $this->hookRunner->onPageMoveComplete(
                        $this->oldTitle,
                        $this->newTitle,
                        $user,
                        $pageid,
                        $redirid,
                        $reason,
                        $nullRevision
                    );
                }
            )
        );
 
        return $moveAttemptResult;
    }
 
    private function moveFile( $oldTitle, $newTitle ) {
        $file = $this->repoGroup->getLocalRepo()->newFile( $oldTitle );
        $file->load( IDBAccessObject::READ_LATEST );
        if ( $file->exists() ) {
            $status = $file->move( $newTitle );
        } else {
            $status = Status::newGood();
        }
 
        // Clear RepoGroup process cache
        $this->repoGroup->clearCache( $oldTitle );
        $this->repoGroup->clearCache( $newTitle ); # clear false negative cache
        return $status;
    }
 
    private function moveToInternal(
        UserIdentity $user,
        &$nt,
        $reason = '',
        $createRedirect = true,
        array $changeTags = []
    ): Status {
        if ( $nt->getArticleID( IDBAccessObject::READ_LATEST ) ) {
            $moveOverRedirect = true;
            $logType = 'move_redir';
        } else {
            $moveOverRedirect = false;
            $logType = 'move';
        }
 
        if ( $moveOverRedirect ) {
            $overwriteMessage = wfMessage(
                    'delete_and_move_reason',
                    $this->oldTitle->getPrefixedText()
                )->inContentLanguage()->text();
            $newpage = $this->wikiPageFactory->newFromTitle( $nt );
            // TODO The public methods of this class should take an Authority.
            $moverAuthority = $this->userFactory->newFromUserIdentity( $user );
            $deletePage = $this->deletePageFactory->newDeletePage( $newpage, $moverAuthority );
            $status = $deletePage
                ->setTags( $changeTags )
                ->setLogSubtype( 'delete_redir' )
                ->deleteUnsafe( $overwriteMessage );
            if ( $status->isGood() && $deletePage->deletionsWereScheduled()[DeletePage::PAGE_BASE] ) {
                // FIXME Scheduled deletion not properly handled here -- it should probably either ensure an
                // immediate deletion or not fail if it was scheduled.
                $status->warning( 'delete-scheduled', wfEscapeWikiText( $nt->getPrefixedText() ) );
            }
 
            if ( !$status->isGood() ) {
                return $status;
            }
 
            $nt->resetArticleID( false );
        }
 
        if ( $createRedirect ) {
            if ( $this->oldTitle->getNamespace() === NS_CATEGORY
                && !wfMessage( 'category-move-redirect-override' )->inContentLanguage()->isDisabled()
            ) {
                $redirectContent = new WikitextContent(
                    wfMessage( 'category-move-redirect-override' )
                        ->params( $nt->getPrefixedText() )->inContentLanguage()->plain() );
            } else {
                $redirectContent = $this->contentHandlerFactory
                    ->getContentHandler( $this->oldTitle->getContentModel() )
                    ->makeRedirectContent(
                        $nt,
                        wfMessage( 'move-redirect-text' )->inContentLanguage()->plain()
                    );
            }
 
            // NOTE: If this page's content model does not support redirects, $redirectContent will be null.
        } else {
            $redirectContent = null;
        }
 
        // T59084: log_page should be the ID of the *moved* page
        $oldid = $this->oldTitle->getArticleID();
        $logTitle = clone $this->oldTitle;
 
        $logEntry = new ManualLogEntry( 'move', $logType );
        $logEntry->setPerformer( $user );
        $logEntry->setTarget( $logTitle );
        $logEntry->setComment( $reason );
        $logEntry->setParameters( [
            '4::target' => $nt->getPrefixedText(),
            '5::noredir' => $redirectContent ? '0' : '1',
        ] );
 
        $formatter = $this->logFormatterFactory->newFromEntry( $logEntry );
        $formatter->setContext( RequestContext::newExtraneousContext( $this->oldTitle ) );
        $comment = $formatter->getPlainActionText();
        if ( $reason ) {
            $comment .= wfMessage( 'colon-separator' )->inContentLanguage()->text() . $reason;
        }
 
        $dbw = $this->dbProvider->getPrimaryDatabase();
 
        $oldpage = $this->wikiPageFactory->newFromTitle( $this->oldTitle );
        $oldcountable = $oldpage->isCountable();
 
        $newpage = $this->wikiPageFactory->newFromTitle( $nt );
 
        # Change the name of the target page:
        $dbw->newUpdateQueryBuilder()
            ->update( 'page' )
            ->set( [
                'page_namespace' => $nt->getNamespace(),
                'page_title' => $nt->getDBkey(),
            ] )
            ->where( [ 'page_id' => $oldid ] )
            ->caller( __METHOD__ )->execute();
 
        // Reset $nt before using it to create the null revision (T248789).
        // But not $this->oldTitle yet, see below (T47348).
        $nt->resetArticleID( $oldid );
 
        $commentObj = CommentStoreComment::newUnsavedComment( $comment );
        # Save a null revision in the page's history notifying of the move
        $nullRevision = $this->revisionStore->newNullRevision(
            $dbw,
            $nt,
            $commentObj,
            true,
            $user
        );
        if ( $nullRevision === null ) {
            $id = $nt->getArticleID( IDBAccessObject::READ_EXCLUSIVE );
            // XXX This should be handled more gracefully
            throw new NormalizedException( 'Failed to create null revision while ' .
                'moving page ID {oldId} to {prefixedDBkey} (page ID {id})',
                [
                    'oldId' => $oldid,
                    'prefixedDBkey' => $nt->getPrefixedDBkey(),
                    'id' => $id,
                ]
            );
        }
 
        $nullRevision = $this->revisionStore->insertRevisionOn( $nullRevision, $dbw );
        $logEntry->setAssociatedRevId( $nullRevision->getId() );
 
        // NOTE: Page moves should contribute to user edit count (T163966).
        //       The dummy revision created below will otherwise not be counted.
        $this->userEditTracker->incrementUserEditCount( $user );
 
        // Get the old redirect state before clean up
        $isRedirect = $this->oldTitle->isRedirect();
        if ( !$redirectContent ) {
            // Clean up the old title *before* reset article id - T47348
            WikiPage::onArticleDelete( $this->oldTitle );
        }
 
        $this->oldTitle->resetArticleID( 0 ); // 0 == non existing
        $newpage->loadPageData( IDBAccessObject::READ_LOCKING ); // T48397
 
        $updater = $this->pageUpdaterFactory->newDerivedPageDataUpdater( $newpage );
        $updater->grabCurrentRevision();
 
        $newpage->updateRevisionOn( $dbw, $nullRevision, null, $isRedirect );
 
        $fakeTags = [];
        $this->hookRunner->onRevisionFromEditComplete(
            $newpage, $nullRevision, $nullRevision->getParentId(), $user, $fakeTags );
 
        // Generate updates for the new dummy revision under the new title.
        // NOTE: The dummy revision will not be counted as a user contribution.
        // NOTE: Use FLAG_SILENT to avoid redundant RecentChanges entry.
        //       The move log already generates one.
        $options = [
            PageUpdatedEvent::FLAG_MOVED => true,
            PageUpdatedEvent::FLAG_SILENT => true,
            'oldtitle' => $this->oldTitle,
            'oldcountable' => $oldcountable,
            'causeAction' => 'MovePage',
            'causeAgent' => $user->getName(),
        ];
 
        $updater->prepareUpdate( $nullRevision, $options );
        $updater->doUpdates();
 
        WikiPage::onArticleCreate( $nt );
 
        # Recreate the redirect, this time in the other direction.
        $redirectRevision = null;
        if ( $redirectContent ) {
            $redirectArticle = $this->wikiPageFactory->newFromTitle( $this->oldTitle );
            $redirectArticle->loadFromRow( false, IDBAccessObject::READ_LOCKING ); // T48397
            $redirectRevision = $redirectArticle->newPageUpdater( $user )
                ->setContent( SlotRecord::MAIN, $redirectContent )
                ->addTags( $changeTags )
                ->addSoftwareTag( 'mw-new-redirect' )
                ->setUsePageCreationLog( false )
                ->setFlags( EDIT_SUPPRESS_RC | EDIT_INTERNAL )
                ->saveRevision( $commentObj );
        }
 
        # Log the move
        $logid = $logEntry->insert();
 
        $logEntry->addTags( $changeTags );
        $logEntry->publish( $logid );
 
        return Status::newGood( [
            'nullRevision' => $nullRevision,
            'redirectRevision' => $redirectRevision,
        ] );
    }
}
 
class_alias( MovePage::class, 'MovePage' );