SpecialMergeHistory.php

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<?php
namespace MediaWiki\Specials;
 
use MediaWiki\ChangeTags\ChangeTagsStore;
use MediaWiki\CommentFormatter\CommentFormatter;
use MediaWiki\HTMLForm\HTMLForm;
use MediaWiki\Logging\LogEventsList;
use MediaWiki\Logging\LogPage;
use MediaWiki\Page\LinkBatchFactory;
use MediaWiki\Page\MergeHistoryFactory;
use MediaWiki\Pager\MergeHistoryPager;
use MediaWiki\Revision\RevisionStore;
use MediaWiki\SpecialPage\SpecialPage;
use MediaWiki\Status\Status;
use MediaWiki\Title\Title;
use Wikimedia\Rdbms\IConnectionProvider;
 
class SpecialMergeHistory extends SpecialPage {
    protected $mAction;
 
    protected $mTarget;
 
    protected $mDest;
 
    protected $mTimestamp;
 
    protected $mTimestampOld;
 
    protected $mTargetID;
 
    protected $mDestID;
 
    protected $mComment;
 
    protected $mMerge;
 
    protected $mSubmitted;
 
    protected $mTargetObj;
 
    protected $mDestObj;
 
    private $mStatus;
 
    public function __construct(
        private readonly MergeHistoryFactory $mergeHistoryFactory,
        private readonly LinkBatchFactory $linkBatchFactory,
        private readonly IConnectionProvider $dbProvider,
        private readonly RevisionStore $revisionStore,
        private readonly CommentFormatter $commentFormatter,
        private readonly ChangeTagsStore $changeTagsStore,
    ) {
        parent::__construct( 'MergeHistory', 'mergehistory' );
    }
 
    public function doesWrites() {
        return true;
    }
 
    private function loadRequestParams() {
        $request = $this->getRequest();
        $this->mAction = $request->getRawVal( 'action' );
        $this->mTarget = $request->getVal( 'target', '' );
        $this->mDest = $request->getVal( 'dest', '' );
        $this->mSubmitted = $request->getBool( 'submitted' );
 
        $this->mTargetID = intval( $request->getVal( 'targetID' ) );
        $this->mDestID = intval( $request->getVal( 'destID' ) );
        $this->mTimestamp = $request->getVal( 'mergepoint' );
        if ( $this->mTimestamp === null || !preg_match( '/[0-9]{14}(\|[0-9]+)?/', $this->mTimestamp ) ) {
            $this->mTimestamp = '';
        }
        $this->mTimestampOld = $request->getVal( 'mergepointold' );
        if ( $this->mTimestampOld === null || !preg_match( '/[0-9]{14}(\|[0-9]+)?/', $this->mTimestamp ) ) {
            $this->mTimestampOld = '';
        }
        $this->mComment = $request->getText( 'wpComment' );
 
        $this->mMerge = $request->wasPosted()
            && $this->getContext()->getCsrfTokenSet()->matchToken( $request->getVal( 'wpEditToken' ) );
 
        // target page
        if ( $this->mSubmitted ) {
            $this->mTargetObj = Title::newFromText( $this->mTarget );
            $this->mDestObj = Title::newFromText( $this->mDest );
        } else {
            $this->mTargetObj = null;
            $this->mDestObj = null;
        }
    }
 
    public function execute( $par ) {
        $this->useTransactionalTimeLimit();
 
        $this->checkPermissions();
        $this->checkReadOnly();
 
        $this->loadRequestParams();
 
        $this->setHeaders();
        $this->outputHeader();
        $status = Status::newGood();
 
        if ( $this->mTargetID && $this->mDestID && $this->mAction == 'submit' && $this->mMerge ) {
            $this->merge();
 
            return;
        }
 
        if ( !$this->mSubmitted ) {
            $this->showMergeForm();
 
            return;
        }
 
        if ( !$this->mTargetObj instanceof Title ) {
            $status->merge( Status::newFatal( 'mergehistory-invalid-source' ) );
        } elseif ( !$this->mTargetObj->exists() ) {
            $status->merge( Status::newFatal(
                'mergehistory-no-source',
                wfEscapeWikiText( $this->mTargetObj->getPrefixedText() )
            ) );
        }
 
        if ( !$this->mDestObj instanceof Title ) {
            $status->merge( Status::newFatal( 'mergehistory-invalid-destination' ) );
        } elseif ( !$this->mDestObj->exists() ) {
            $status->merge( Status::newFatal(
                'mergehistory-no-destination',
                wfEscapeWikiText( $this->mDestObj->getPrefixedText() )
            ) );
        }
 
        if ( $this->mTargetObj && $this->mDestObj && $this->mTargetObj->equals( $this->mDestObj ) ) {
            $status->merge( Status::newFatal( 'mergehistory-same-destination' ) );
        }
 
        $this->mStatus = $status;
 
        $this->showMergeForm();
 
        if ( $this->mStatus->isGood() ) {
            $this->showHistory();
        }
    }
 
    private function showMergeForm() {
        $out = $this->getOutput();
        $out->addWikiMsg( 'mergehistory-header' );
 
        $fields = [
            'submitted' => [
                'type' => 'hidden',
                'default' => '1',
                'name' => 'submitted'
            ],
            'title' => [
                'type' => 'hidden',
                'default' => $this->getPageTitle()->getPrefixedDBkey(),
                'name' => 'title'
            ],
            'mergepoint' => [
                'type' => 'hidden',
                'default' => $this->mTimestamp,
                'name' => 'mergepoint'
            ],
            'mergepointold' => [
                'type' => 'hidden',
                'default' => $this->mTimestampOld,
                'name' => 'mergepointold'
            ],
            'target' => [
                'type' => 'title',
                'label-message' => 'mergehistory-from',
                'default' => $this->mTarget,
                'id' => 'target',
                'name' => 'target'
            ],
            'dest' => [
                'type' => 'title',
                'label-message' => 'mergehistory-into',
                'default' => $this->mDest,
                'id' => 'dest',
                'name' => 'dest'
            ]
        ];
 
        $form = HTMLForm::factory( 'ooui', $fields, $this->getContext() );
        $form->setWrapperLegendMsg( 'mergehistory-box' )
            ->setSubmitTextMsg( 'mergehistory-go' )
            ->setMethod( 'get' )
            ->prepareForm()
            ->displayForm( $this->mStatus );
 
        $this->addHelpLink( 'Help:Merge history' );
    }
 
    private function showHistory() {
        # List all stored revisions
        $revisions = new MergeHistoryPager(
            $this->getContext(),
            $this->getLinkRenderer(),
            $this->linkBatchFactory,
            $this->dbProvider,
            $this->revisionStore,
            $this->commentFormatter,
            $this->changeTagsStore,
            [],
            $this->mTargetObj,
            $this->mDestObj,
            $this->mTimestamp,
            $this->mTimestampOld
        );
        $haveRevisions = $revisions->getNumRows() > 0;
 
        $out = $this->getOutput();
        $out->addModuleStyles( [
            'mediawiki.interface.helpers.styles',
            'mediawiki.special'
        ] );
        $out->addModules( 'mediawiki.special.mergeHistory' );
        $titleObj = $this->getPageTitle();
        $action = $titleObj->getLocalURL( [ 'action' => 'submit' ] );
        # Start the form here
        $fields = [
            'targetID' => [
                'type' => 'hidden',
                'name' => 'targetID',
                'default' => $this->mTargetObj->getArticleID()
            ],
            'destID' => [
                'type' => 'hidden',
                'name' => 'destID',
                'default' => $this->mDestObj->getArticleID()
            ],
            'target' => [
                'type' => 'hidden',
                'name' => 'target',
                'default' => $this->mTarget
            ],
            'dest' => [
                'type' => 'hidden',
                'name' => 'dest',
                'default' => $this->mDest
            ],
        ];
        if ( $haveRevisions ) {
            $fields += [
                'explanation' => [
                    'type' => 'info',
                    'default' => $this->msg( 'mergehistory-merge', $this->mTargetObj->getPrefixedText(),
                        $this->mDestObj->getPrefixedText() )->parse(),
                    'raw' => true,
                    'cssclass' => 'mw-mergehistory-explanation',
                    'section' => 'mergehistory-submit'
                ],
                'reason' => [
                    'type' => 'text',
                    'name' => 'wpComment',
                    'label-message' => 'mergehistory-reason',
                    'size' => 50,
                    'default' => $this->mComment,
                    'section' => 'mergehistory-submit'
                ],
                'submit' => [
                    'type' => 'submit',
                    'default' => $this->msg( 'mergehistory-submit' ),
                    'section' => 'mergehistory-submit',
                    'id' => 'mw-merge-submit',
                    'name' => 'merge'
                ]
            ];
        }
        $form = HTMLForm::factory( 'ooui', $fields, $this->getContext() );
        $form->addHiddenField( 'wpEditToken', $form->getCsrfTokenSet()->getToken() )
            ->setId( 'merge' )
            ->setAction( $action )
            ->suppressDefaultSubmit();
 
        if ( $haveRevisions ) {
            $form->setFooterHtml(
                '<h2 id="mw-mergehistory">' . $this->msg( 'mergehistory-list' )->escaped() . '</h2>' .
                $revisions->getNavigationBar() .
                $revisions->getBody() .
                $revisions->getNavigationBar()
            );
        } else {
            $form->setFooterHtml( $this->msg( 'mergehistory-empty' )->escaped() );
        }
 
        $form->prepareForm()->displayForm( false );
 
        # Show relevant lines from the merge log:
        $mergeLogPage = new LogPage( 'merge' );
        $out->addHTML( '<h2>' . $mergeLogPage->getName()->escaped() . "</h2>\n" );
        LogEventsList::showLogExtract( $out, 'merge', $this->mTargetObj );
    }
 
    private function merge() {
        # Get the titles directly from the IDs, in case the target page params
        # were spoofed. The queries are done based on the IDs, so it's best to
        # keep it consistent...
        $targetTitle = Title::newFromID( $this->mTargetID );
        $destTitle = Title::newFromID( $this->mDestID );
        if ( $targetTitle === null || $destTitle === null ) {
            return false; // validate these
        }
        if ( $targetTitle->getArticleID() == $destTitle->getArticleID() ) {
            return false;
        }
 
        // MergeHistory object
        $mh = $this->mergeHistoryFactory->newMergeHistory(
            $targetTitle,
            $destTitle,
            $this->mTimestamp,
            $this->mTimestampOld
        );
 
        // Merge!
        $mergeStatus = $mh->merge( $this->getAuthority(), $this->mComment );
        if ( !$mergeStatus->isOK() ) {
            // Failed merge
            $this->getOutput()->addWikiMsg( Status::wrap( $mergeStatus )->getMessage() );
            return false;
        }
 
        $linkRenderer = $this->getLinkRenderer();
 
        $targetLink = $linkRenderer->makeLink(
            $targetTitle,
            null,
            [],
            [ 'redirect' => 'no' ]
        );
 
        // In some cases the target page will be deleted
        $append = ( $mergeStatus->getValue() === 'source-deleted' )
            ? $this->msg( 'mergehistory-source-deleted', $targetTitle->getPrefixedText() ) : '';
 
        $this->getOutput()->addWikiMsg( $this->msg( 'mergehistory-done' )
            ->rawParams( $targetLink )
            ->params( $destTitle->getPrefixedText(), $append )
            ->numParams( $mh->getMergedRevisionCount() )
        );
 
        return true;
    }
 
    protected function getGroupName() {
        return 'pagetools';
    }
}
 
class_alias( SpecialMergeHistory::class, 'SpecialMergeHistory' );