ApiStashEdit.php

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<?php
use MediaWiki\MediaWikiServices;
use MediaWiki\Storage\PageEditStash;
 
class ApiStashEdit extends ApiBase {
    const ERROR_NONE = PageEditStash::ERROR_NONE; // b/c
    const ERROR_PARSE = PageEditStash::ERROR_PARSE; // b/c
    const ERROR_CACHE = PageEditStash::ERROR_CACHE; // b/c
    const ERROR_UNCACHEABLE = PageEditStash::ERROR_UNCACHEABLE; // b/c
    const ERROR_BUSY = PageEditStash::ERROR_BUSY; // b/c
 
    public function execute() {
        $user = $this->getUser();
        $params = $this->extractRequestParams();
 
        if ( $user->isBot() ) { // sanity
            $this->dieWithError( 'apierror-botsnotsupported' );
        }
 
        $editStash = MediaWikiServices::getInstance()->getPageEditStash();
        $page = $this->getTitleOrPageId( $params );
        $title = $page->getTitle();
 
        if ( !ContentHandler::getForModelID( $params['contentmodel'] )
            ->isSupportedFormat( $params['contentformat'] )
        ) {
            $this->dieWithError(
                [ 'apierror-badformat-generic', $params['contentformat'], $params['contentmodel'] ],
                'badmodelformat'
            );
        }
 
        $this->requireOnlyOneParameter( $params, 'stashedtexthash', 'text' );
 
        $text = null;
        $textHash = null;
        if ( $params['stashedtexthash'] !== null ) {
            // Load from cache since the client indicates the text is the same as last stash
            $textHash = $params['stashedtexthash'];
            if ( !preg_match( '/^[0-9a-f]{40}$/', $textHash ) ) {
                $this->dieWithError( 'apierror-stashedit-missingtext', 'missingtext' );
            }
            $text = $editStash->fetchInputText( $textHash );
            if ( !is_string( $text ) ) {
                $this->dieWithError( 'apierror-stashedit-missingtext', 'missingtext' );
            }
        } else {
            // 'text' was passed.  Trim and fix newlines so the key SHA1's
            // match (see WebRequest::getText())
            $text = rtrim( str_replace( "\r\n", "\n", $params['text'] ) );
            $textHash = sha1( $text );
        }
 
        $textContent = ContentHandler::makeContent(
            $text, $title, $params['contentmodel'], $params['contentformat'] );
 
        $page = WikiPage::factory( $title );
        if ( $page->exists() ) {
            // Page exists: get the merged content with the proposed change
            $baseRev = Revision::newFromPageId( $page->getId(), $params['baserevid'] );
            if ( !$baseRev ) {
                $this->dieWithError( [ 'apierror-nosuchrevid', $params['baserevid'] ] );
            }
            $currentRev = $page->getRevision();
            if ( !$currentRev ) {
                $this->dieWithError( [ 'apierror-missingrev-pageid', $page->getId() ], 'missingrev' );
            }
            // Merge in the new version of the section to get the proposed version
            $editContent = $page->replaceSectionAtRev(
                $params['section'],
                $textContent,
                $params['sectiontitle'],
                $baseRev->getId()
            );
            if ( !$editContent ) {
                $this->dieWithError( 'apierror-sectionreplacefailed', 'replacefailed' );
            }
            if ( $currentRev->getId() == $baseRev->getId() ) {
                // Base revision was still the latest; nothing to merge
                $content = $editContent;
            } else {
                // Merge the edit into the current version
                $baseContent = $baseRev->getContent();
                $currentContent = $currentRev->getContent();
                if ( !$baseContent || !$currentContent ) {
                    $this->dieWithError( [ 'apierror-missingcontent-pageid', $page->getId() ], 'missingrev' );
                }
                $handler = ContentHandler::getForModelID( $baseContent->getModel() );
                $content = $handler->merge3( $baseContent, $editContent, $currentContent );
            }
        } else {
            // New pages: use the user-provided content model
            $content = $textContent;
        }
 
        if ( !$content ) { // merge3() failed
            $this->getResult()->addValue( null,
                $this->getModuleName(), [ 'status' => 'editconflict' ] );
            return;
        }
 
        if ( $user->pingLimiter( 'stashedit' ) ) {
            $status = 'ratelimited';
        } else {
            $status = $editStash->parseAndCache( $page, $content, $user, $params['summary'] );
            $editStash->stashInputText( $text, $textHash );
        }
 
        $stats = MediaWikiServices::getInstance()->getStatsdDataFactory();
        $stats->increment( "editstash.cache_stores.$status" );
 
        $ret = [ 'status' => $status ];
        // If we were rate-limited, we still return the pre-existing valid hash if one was passed
        if ( $status !== 'ratelimited' || $params['stashedtexthash'] !== null ) {
            $ret['texthash'] = $textHash;
        }
 
        $this->getResult()->addValue( null, $this->getModuleName(), $ret );
    }
 
    public function parseAndStash( WikiPage $page, Content $content, User $user, $summary ) {
        $editStash = MediaWikiServices::getInstance()->getPageEditStash();
 
        return $editStash->parseAndCache( $page, $content, $user, $summary );
    }
 
    public function getAllowedParams() {
        return [
            'title' => [
                ApiBase::PARAM_TYPE => 'string',
                ApiBase::PARAM_REQUIRED => true
            ],
            'section' => [
                ApiBase::PARAM_TYPE => 'string',
            ],
            'sectiontitle' => [
                ApiBase::PARAM_TYPE => 'string'
            ],
            'text' => [
                ApiBase::PARAM_TYPE => 'text',
                ApiBase::PARAM_DFLT => null
            ],
            'stashedtexthash' => [
                ApiBase::PARAM_TYPE => 'string',
                ApiBase::PARAM_DFLT => null
            ],
            'summary' => [
                ApiBase::PARAM_TYPE => 'string',
            ],
            'contentmodel' => [
                ApiBase::PARAM_TYPE => ContentHandler::getContentModels(),
                ApiBase::PARAM_REQUIRED => true
            ],
            'contentformat' => [
                ApiBase::PARAM_TYPE => ContentHandler::getAllContentFormats(),
                ApiBase::PARAM_REQUIRED => true
            ],
            'baserevid' => [
                ApiBase::PARAM_TYPE => 'integer',
                ApiBase::PARAM_REQUIRED => true
            ]
        ];
    }
 
    public function needsToken() {
        return 'csrf';
    }
 
    public function mustBePosted() {
        return true;
    }
 
    public function isWriteMode() {
        return true;
    }
 
    public function isInternal() {
        return true;
    }
}