mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-24 22:35:41 +00:00
702 lines
22 KiB
PHP
702 lines
22 KiB
PHP
<?php
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/**
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* Parsoid/RESTBase+MediaWiki API wrapper.
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*
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* @file
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* @ingroup Extensions
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* @copyright 2011-2016 VisualEditor Team and others; see AUTHORS.txt
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* @license The MIT License (MIT); see LICENSE.txt
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*/
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class ApiVisualEditor extends ApiBase {
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// These are safe even if VE is not enabled on the page.
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// This is intended for other VE interfaces, such as Flow's.
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protected static $SAFE_ACTIONS = [
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'parsefragment',
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];
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/**
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* @var Config
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*/
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protected $veConfig;
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/**
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* @var VirtualRESTServiceClient
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*/
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protected $serviceClient;
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public function __construct( ApiMain $main, $name, Config $config ) {
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parent::__construct( $main, $name );
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$this->veConfig = $config;
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$this->serviceClient = new VirtualRESTServiceClient( new MultiHttpClient( [] ) );
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$this->serviceClient->mount( '/restbase/', $this->getVRSObject() );
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}
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/**
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* Creates the virtual REST service object to be used in VE's API calls. The
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* method determines whether to instantiate a ParsoidVirtualRESTService or a
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* RestbaseVirtualRESTService object based on configuration directives: if
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* $wgVirtualRestConfig['modules']['restbase'] is defined, RESTBase is chosen,
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* otherwise Parsoid is used (either by using the MW Core config, or the
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* VE-local one).
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*
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* @return VirtualRESTService the VirtualRESTService object to use
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*/
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private function getVRSObject() {
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// the params array to create the service object with
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$params = [];
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// the VRS class to use, defaults to Parsoid
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$class = 'ParsoidVirtualRESTService';
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$config = $this->veConfig;
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// the global virtual rest service config object, if any
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$vrs = $this->getConfig()->get( 'VirtualRestConfig' );
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if ( isset( $vrs['modules'] ) && isset( $vrs['modules']['restbase'] ) ) {
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// if restbase is available, use it
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$params = $vrs['modules']['restbase'];
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$params['parsoidCompat'] = false; // backward compatibility
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$class = 'RestbaseVirtualRESTService';
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} elseif ( isset( $vrs['modules'] ) && isset( $vrs['modules']['parsoid'] ) ) {
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// there's a global parsoid config, use it next
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$params = $vrs['modules']['parsoid'];
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$params['restbaseCompat'] = true;
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} else {
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// no global modules defined, fall back to old defaults
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$params = [
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'URL' => $config->get( 'VisualEditorParsoidURL' ),
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'prefix' => $config->get( 'VisualEditorParsoidPrefix' ),
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'domain' => $config->get( 'VisualEditorParsoidDomain' ),
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'timeout' => $config->get( 'VisualEditorParsoidTimeout' ),
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'HTTPProxy' => $config->get( 'VisualEditorParsoidHTTPProxy' ),
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'forwardCookies' => $config->get( 'VisualEditorParsoidForwardCookies' ),
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'restbaseCompat' => true
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];
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}
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// merge the global and service-specific params
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if ( isset( $vrs['global'] ) ) {
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$params = array_merge( $vrs['global'], $params );
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}
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// set up cookie forwarding
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if ( $params['forwardCookies'] && !User::isEveryoneAllowed( 'read' ) ) {
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$params['forwardCookies'] = RequestContext::getMain()->getRequest()->getHeader( 'Cookie' );
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} else {
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$params['forwardCookies'] = false;
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}
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// create the VRS object and return it
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return new $class( $params );
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}
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private function requestRestbase( $method, $path, $params, $reqheaders = [] ) {
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$request = [
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'method' => $method,
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'url' => '/restbase/local/v1/' . $path
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];
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if ( $method === 'GET' ) {
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$request['query'] = $params;
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} else {
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$request['body'] = $params;
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}
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$request['headers'] = $reqheaders;
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$response = $this->serviceClient->run( $request );
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if ( $response['code'] === 200 && $response['error'] === "" ) {
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// If response was served directly from Varnish, use the response
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// (RP) header to declare the cache hit and pass the data to the client.
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$headers = $response['headers'];
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$rp = null;
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if ( isset( $headers['x-cache'] ) && strpos( $headers['x-cache'], 'hit' ) !== false ) {
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$rp = 'cached-response=true';
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}
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if ( $rp !== null ) {
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$resp = $this->getRequest()->response();
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$resp->header( 'X-Cache: ' . $rp );
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}
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} elseif ( $response['error'] !== '' ) {
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$this->dieUsage( 'docserver-http-error: ' . $response['error'], $response['error'] );
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} else { // error null, code not 200
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$this->dieUsage( 'docserver-http: HTTP ' . $response['code'], $response['code'] );
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}
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return $response['body'];
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}
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protected function storeInSerializationCache( $title, $oldid, $html, $etag ) {
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global $wgMemc;
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// Convert the VE HTML to wikitext
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$text = $this->postHTML( $title, $html, [ 'oldid' => $oldid ], $etag );
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if ( $text === false ) {
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return false;
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}
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// Store the corresponding wikitext, referenceable by a new key
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$hash = md5( $text );
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$key = wfMemcKey( 'visualeditor', 'serialization', $hash );
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$wgMemc->set( $key, $text,
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$this->veConfig->get( 'VisualEditorSerializationCacheTimeout' ) );
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// Also parse and prepare the edit in case it might be saved later
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$page = WikiPage::factory( $title );
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$content = ContentHandler::makeContent( $text, $title, CONTENT_MODEL_WIKITEXT );
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$res = ApiStashEdit::parseAndStash( $page, $content, $this->getUser() );
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if ( $res === ApiStashEdit::ERROR_NONE ) {
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wfDebugLog( 'StashEdit', "Cached parser output for VE content key '$key'." );
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}
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return $hash;
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}
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protected function trySerializationCache( $hash ) {
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global $wgMemc;
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$key = wfMemcKey( 'visualeditor', 'serialization', $hash );
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return $wgMemc->get( $key );
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}
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protected function postHTML( $title, $html, $parserParams, $etag ) {
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if ( $parserParams['oldid'] === 0 ) {
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$parserParams['oldid'] = '';
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}
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$path = 'transform/html/to/wikitext/' . urlencode( $title->getPrefixedDBkey() );
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if ( $parserParams['oldid'] ) {
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$path .= '/' . $parserParams['oldid'];
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}
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return $this->requestRestbase(
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'POST',
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$path,
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[
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'html' => $html,
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'scrub_wikitext' => 1,
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],
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[ 'If-Match' => $etag ]
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);
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}
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protected function pstWikitext( $title, $wikitext ) {
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return ContentHandler::makeContent( $wikitext, $title, CONTENT_MODEL_WIKITEXT )
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->preSaveTransform(
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$title,
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$this->getUser(),
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WikiPage::factory( $title )->makeParserOptions( $this->getContext() )
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)
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->serialize( 'text/x-wiki' );
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}
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protected function parseWikitextFragment( $title, $wikitext ) {
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return $this->requestRestbase(
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'POST',
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'transform/wikitext/to/html/' . urlencode( $title->getPrefixedDBkey() ),
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[
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'wikitext' => $wikitext,
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'body_only' => 1,
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]
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);
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}
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protected function diffWikitext( $title, $wikitext ) {
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$apiParams = [
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'action' => 'query',
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'prop' => 'revisions',
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'titles' => $title->getPrefixedDBkey(),
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'rvdifftotext' => $this->pstWikitext( $title, $wikitext )
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];
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$api = new ApiMain(
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new DerivativeRequest(
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$this->getRequest(),
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$apiParams,
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false // was posted?
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),
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false // enable write?
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);
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$api->execute();
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if ( defined( 'ApiResult::META_CONTENT' ) ) {
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$result = $api->getResult()->getResultData( null, [
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'BC' => [], // Transform content nodes to '*'
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'Types' => [], // Add back-compat subelements
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] );
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} else {
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$result = $api->getResultData();
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}
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if ( !isset( $result['query']['pages'][$title->getArticleID()]['revisions'][0]['diff']['*'] ) ) {
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return [ 'result' => 'fail' ];
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}
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$diffRows = $result['query']['pages'][$title->getArticleID()]['revisions'][0]['diff']['*'];
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if ( $diffRows !== '' ) {
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$context = new DerivativeContext( $this->getContext() );
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$context->setTitle( $title );
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$engine = new DifferenceEngine( $context );
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return [
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'result' => 'success',
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'diff' => $engine->addHeader(
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$diffRows,
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$context->msg( 'currentrev' )->parse(),
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$context->msg( 'yourtext' )->parse()
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)
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];
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} else {
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return [ 'result' => 'nochanges' ];
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}
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}
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protected function getLangLinks( $title ) {
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$apiParams = [
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'action' => 'query',
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'prop' => 'langlinks',
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'lllimit' => 500,
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'titles' => $title->getPrefixedDBkey(),
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'indexpageids' => 1,
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];
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$api = new ApiMain(
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new DerivativeRequest(
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$this->getRequest(),
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$apiParams,
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false // was posted?
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),
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true // enable write?
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);
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$api->execute();
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if ( defined( 'ApiResult::META_CONTENT' ) ) {
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$result = $api->getResult()->getResultData( null, [
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'BC' => [], // Backwards-compatible structure transformations
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'Types' => [], // Backwards-compatible structure transformations
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'Strip' => 'all', // Remove any metadata keys from the langlinks array
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] );
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} else {
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$result = $api->getResultData();
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}
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if ( !isset( $result['query']['pages'][$title->getArticleID()]['langlinks'] ) ) {
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return false;
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}
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$langlinks = $result['query']['pages'][$title->getArticleID()]['langlinks'];
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$langnames = Language::fetchLanguageNames();
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foreach ( $langlinks as $i => $lang ) {
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$langlinks[$i]['langname'] = $langnames[$langlinks[$i]['lang']];
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}
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return $langlinks;
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}
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public function execute() {
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$user = $this->getUser();
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$params = $this->extractRequestParams();
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$title = Title::newFromText( $params['page'] );
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if ( !$title ) {
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$this->dieUsageMsg( 'invalidtitle', $params['page'] );
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}
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$isSafeAction = in_array( $params['paction'], self::$SAFE_ACTIONS, true );
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$availableNamespaces = $this->veConfig->get( 'VisualEditorAvailableNamespaces' );
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if ( !$isSafeAction && (
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!isset( $availableNamespaces[$title->getNamespace()] ) ||
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!$availableNamespaces[$title->getNamespace()]
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) ) {
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$this->dieUsage( "VisualEditor is not enabled in namespace " .
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$title->getNamespace(), 'novenamespace' );
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}
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$parserParams = [];
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if ( isset( $params['oldid'] ) ) {
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$parserParams['oldid'] = $params['oldid'];
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}
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$html = $params['html'];
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if ( substr( $html, 0, 11 ) === 'rawdeflate,' ) {
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$deflated = base64_decode( substr( $html, 11 ) );
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wfSuppressWarnings();
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$html = gzinflate( $deflated );
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wfRestoreWarnings();
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if ( $deflated === $html || $html === false ) {
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$this->dieUsage( "HTML provided is not properly deflated", 'invaliddeflate' );
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}
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}
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wfDebugLog( 'visualeditor', "called on '$title' with paction: '{$params['paction']}'" );
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switch ( $params['paction'] ) {
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case 'parse':
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case 'metadata':
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// Dirty hack to provide the correct context for edit notices
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global $wgTitle; // FIXME NOOOOOOOOES
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$wgTitle = $title;
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RequestContext::getMain()->setTitle( $title );
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// Get information about current revision
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if ( $title->exists() ) {
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$latestRevision = Revision::newFromTitle( $title );
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if ( $latestRevision === null ) {
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$this->dieUsage( 'Could not find latest revision for title', 'latestnotfound' );
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}
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$revision = null;
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if ( !isset( $parserParams['oldid'] ) || $parserParams['oldid'] === 0 ) {
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$parserParams['oldid'] = $latestRevision->getId();
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$revision = $latestRevision;
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} else {
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$revision = Revision::newFromId( $parserParams['oldid'] );
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if ( $revision === null ) {
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$this->dieUsage( 'Could not find revision ID ' . $parserParams['oldid'], 'oldidnotfound' );
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}
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}
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$restoring = $revision && !$revision->isCurrent();
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$baseTimestamp = $latestRevision->getTimestamp();
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$oldid = intval( $parserParams['oldid'] );
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// If requested, request HTML from Parsoid/RESTBase
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if ( $params['paction'] === 'parse' ) {
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$content = $this->requestRestbase(
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'GET',
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'page/html/' . urlencode( $title->getPrefixedDBkey() ) . '/' . $oldid,
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[]
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);
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if ( $content === false ) {
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$this->dieUsage( 'Error contacting the document server', 'docserver' );
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}
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}
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} else {
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$content = '';
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$baseTimestamp = wfTimestampNow();
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$oldid = 0;
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$restoring = false;
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}
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// Get edit notices
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$notices = $title->getEditNotices();
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// Anonymous user notice
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if ( $user->isAnon() ) {
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$notices[] = $this->msg(
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'anoneditwarning',
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// Log-in link
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'{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
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// Sign-up link
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'{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}'
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)->parseAsBlock();
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}
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// Old revision notice
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if ( $restoring ) {
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$notices[] = $this->msg( 'editingold' )->parseAsBlock();
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}
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// New page notices
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if ( !$title->exists() ) {
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$notices[] = $this->msg(
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$user->isLoggedIn() ? 'newarticletext' : 'newarticletextanon',
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wfExpandUrl( Skin::makeInternalOrExternalUrl(
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$this->msg( 'helppage' )->inContentLanguage()->text()
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) )
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)->parseAsBlock();
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// Page protected from creation
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if ( $title->getRestrictions( 'create' ) ) {
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$notices[] = $this->msg( 'titleprotectedwarning' )->parseAsBlock();
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}
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}
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// Look at protection status to set up notices + surface class(es)
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$protectedClasses = [];
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if ( MWNamespace::getRestrictionLevels( $title->getNamespace() ) !== [ '' ] ) {
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// Page protected from editing
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if ( $title->isProtected( 'edit' ) ) {
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# Is the title semi-protected?
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if ( $title->isSemiProtected() ) {
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$protectedClasses[] = 'mw-textarea-sprotected';
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$noticeMsg = 'semiprotectedpagewarning';
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} else {
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$protectedClasses[] = 'mw-textarea-protected';
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# Then it must be protected based on static groups (regular)
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$noticeMsg = 'protectedpagewarning';
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}
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$notices[] = $this->msg( $noticeMsg )->parseAsBlock() .
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$this->getLastLogEntry( $title, 'protect' );
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}
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// Deal with cascading edit protection
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list( $sources, $restrictions ) = $title->getCascadeProtectionSources();
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if ( isset( $restrictions['edit'] ) ) {
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$protectedClasses[] = ' mw-textarea-cprotected';
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$notice = $this->msg( 'cascadeprotectedwarning' )->parseAsBlock() . '<ul>';
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// Unfortunately there's no nice way to get only the pages which cause
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// editing to be restricted
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foreach ( $sources as $source ) {
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$notice .= "<li>" . Linker::link( $source ) . "</li>";
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}
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$notice .= '</ul>';
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$notices[] = $notice;
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}
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}
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// Permission notice
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$permErrors = $title->getUserPermissionsErrors( 'create', $user );
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if ( $permErrors && !$title->exists() ) {
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$notices[] = $this->msg(
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'permissionserrorstext-withaction', 1, $this->msg( 'action-createpage' )
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) . "<br>" . call_user_func_array( [ $this, 'msg' ], $permErrors[0] )->parse();
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}
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// Show notice when editing user / user talk page of a user that doesn't exist
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// or who is blocked
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// HACK of course this code is partly duplicated from EditPage.php :(
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if ( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
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$parts = explode( '/', $title->getText(), 2 );
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$targetUsername = $parts[0];
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$targetUser = User::newFromName( $targetUsername, false /* allow IP users*/ );
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if (
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!( $targetUser && $targetUser->isLoggedIn() ) &&
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!User::isIP( $targetUsername )
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) { // User does not exist
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$notices[] = "<div class=\"mw-userpage-userdoesnotexist error\">\n" .
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$this->msg( 'userpage-userdoesnotexist', wfEscapeWikiText( $targetUsername ) ) .
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"\n</div>";
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} elseif ( $targetUser->isBlocked() ) { // Show log extract if the user is currently blocked
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$notices[] = $this->msg(
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'blocked-notice-logextract',
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$targetUser->getName() // Support GENDER in notice
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)->parseAsBlock() . $this->getLastLogEntry( $targetUser->getUserPage(), 'block' );
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}
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}
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// Blocked user notice
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if ( $user->isBlockedFrom( $title ) && $user->getBlock()->prevents( 'edit' ) !== false ) {
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$notices[] = call_user_func_array(
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[ $this, 'msg' ],
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$user->getBlock()->getPermissionsError( $this->getContext() )
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)->parseAsBlock();
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}
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// Blocked user notice for global blocks
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if ( class_exists( 'GlobalBlocking' ) ) {
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$error = GlobalBlocking::getUserBlockErrors(
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$user,
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$this->getRequest()->getIP()
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);
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if ( count( $error ) ) {
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$notices[] = call_user_func_array(
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[ $this, 'msg' ],
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$error
|
|
)->parseAsBlock();
|
|
}
|
|
}
|
|
|
|
// HACK: Build a fake EditPage so we can get checkboxes from it
|
|
$article = new Article( $title ); // Deliberately omitting ,0 so oldid comes from request
|
|
$ep = new EditPage( $article );
|
|
$req = $this->getRequest();
|
|
$req->setVal( 'format', 'text/x-wiki' );
|
|
$ep->importFormData( $req ); // By reference for some reason (bug 52466)
|
|
$tabindex = 0;
|
|
$states = [ 'minor' => false, 'watch' => false ];
|
|
$checkboxes = $ep->getCheckboxes( $tabindex, $states );
|
|
|
|
// HACK: Find out which red links are on the page
|
|
// We do the lookup for the current version. This might not be entirely complete
|
|
// if we're loading an oldid, but it'll probably be close enough, and LinkCache
|
|
// will automatically request any additional data it needs.
|
|
$links = [];
|
|
$wikipage = WikiPage::factory( $title );
|
|
$popts = $wikipage->makeParserOptions( 'canonical' );
|
|
$cached = ParserCache::singleton()->get( $article, $popts, true );
|
|
$links = [
|
|
// Array of linked pages that are missing
|
|
'missing' => [],
|
|
// For current revisions: 1 (treat all non-missing pages as known)
|
|
// For old revisions: array of linked pages that are known
|
|
'known' => $restoring || !$cached ? [] : 1,
|
|
];
|
|
if ( $cached ) {
|
|
foreach ( $cached->getLinks() as $namespace => $cachedTitles ) {
|
|
foreach ( $cachedTitles as $cachedTitleText => $exists ) {
|
|
$cachedTitle = Title::makeTitle( $namespace, $cachedTitleText );
|
|
if ( !$cachedTitle->isKnown() ) {
|
|
$links['missing'][] = $cachedTitle->getPrefixedText();
|
|
} elseif ( $links['known'] !== 1 ) {
|
|
$links['known'][] = $cachedTitle->getPrefixedText();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// Add information about current page
|
|
if ( !$title->isKnown() ) {
|
|
$links['missing'][] = $title->getPrefixedText();
|
|
} elseif ( $links['known'] !== 1 ) {
|
|
$links['known'][] = $title->getPrefixedText();
|
|
}
|
|
|
|
// On parser cache miss, just don't bother populating red link data
|
|
|
|
$result = [
|
|
'result' => 'success',
|
|
'notices' => $notices,
|
|
'checkboxes' => $checkboxes,
|
|
'links' => $links,
|
|
'protectedClasses' => implode( ' ', $protectedClasses ),
|
|
'watched' => $user->isWatched( $title ),
|
|
'basetimestamp' => $baseTimestamp,
|
|
'starttimestamp' => wfTimestampNow(),
|
|
'oldid' => $oldid,
|
|
|
|
];
|
|
if ( $params['paction'] === 'parse' ) {
|
|
$result['content'] = $content;
|
|
}
|
|
break;
|
|
|
|
case 'parsefragment':
|
|
$wikitext = $params['wikitext'];
|
|
if ( $params['pst'] ) {
|
|
$wikitext = $this->pstWikitext( $title, $wikitext );
|
|
}
|
|
$content = $this->parseWikitextFragment( $title, $wikitext );
|
|
if ( $content === false ) {
|
|
$this->dieUsage( 'Error contacting the document server', 'docserver' );
|
|
} else {
|
|
$result = [
|
|
'result' => 'success',
|
|
'content' => $content
|
|
];
|
|
}
|
|
break;
|
|
|
|
case 'serialize':
|
|
if ( $params['cachekey'] !== null ) {
|
|
$content = $this->trySerializationCache( $params['cachekey'] );
|
|
if ( !is_string( $content ) ) {
|
|
$this->dieUsage( 'No cached serialization found with that key', 'badcachekey' );
|
|
}
|
|
} else {
|
|
if ( $params['html'] === null ) {
|
|
$this->dieUsageMsg( 'missingparam', 'html' );
|
|
}
|
|
$content = $this->postHTML( $title, $html, $parserParams, $params['etag'] );
|
|
if ( $content === false ) {
|
|
$this->dieUsage( 'Error contacting the document server', 'docserver' );
|
|
}
|
|
}
|
|
$result = [ 'result' => 'success', 'content' => $content ];
|
|
break;
|
|
|
|
case 'diff':
|
|
if ( $params['cachekey'] !== null ) {
|
|
$wikitext = $this->trySerializationCache( $params['cachekey'] );
|
|
if ( !is_string( $wikitext ) ) {
|
|
$this->dieUsage( 'No cached serialization found with that key', 'badcachekey' );
|
|
}
|
|
} else {
|
|
$wikitext = $this->postHTML( $title, $html, $parserParams, $params['etag'] );
|
|
if ( $wikitext === false ) {
|
|
$this->dieUsage( 'Error contacting the document server', 'docserver' );
|
|
}
|
|
}
|
|
|
|
$diff = $this->diffWikitext( $title, $wikitext );
|
|
if ( $diff['result'] === 'fail' ) {
|
|
$this->dieUsage( 'Diff failed', 'difffailed' );
|
|
}
|
|
$result = $diff;
|
|
|
|
break;
|
|
|
|
case 'serializeforcache':
|
|
if ( !isset( $parserParams['oldid'] ) ) {
|
|
$parserParams['oldid'] = Revision::newFromTitle( $title )->getId();
|
|
}
|
|
$key = $this->storeInSerializationCache(
|
|
$title,
|
|
$parserParams['oldid'],
|
|
$html,
|
|
$params['etag']
|
|
);
|
|
$result = [ 'result' => 'success', 'cachekey' => $key ];
|
|
break;
|
|
|
|
case 'getlanglinks':
|
|
$langlinks = $this->getLangLinks( $title );
|
|
if ( $langlinks === false ) {
|
|
$this->dieUsage( 'Error querying MediaWiki API', 'api-langlinks-error' );
|
|
} else {
|
|
$result = [ 'result' => 'success', 'langlinks' => $langlinks ];
|
|
}
|
|
break;
|
|
}
|
|
|
|
$this->getResult()->addValue( null, $this->getModuleName(), $result );
|
|
}
|
|
|
|
/**
|
|
* Gets the relevant HTML for the latest log entry on a given title, including a full log link.
|
|
*
|
|
* @param $title Title
|
|
* @param $types array|string
|
|
* @return string
|
|
*/
|
|
private function getLastLogEntry( $title, $types = '' ) {
|
|
$lp = new LogPager(
|
|
new LogEventsList( $this->getContext() ),
|
|
$types,
|
|
'',
|
|
$title->getPrefixedDbKey()
|
|
);
|
|
$lp->mLimit = 1;
|
|
|
|
return $lp->getBody() . Linker::link(
|
|
SpecialPage::getTitleFor( 'Log' ),
|
|
$this->msg( 'log-fulllog' )->escaped(),
|
|
[],
|
|
[
|
|
'page' => $title->getPrefixedDBkey(),
|
|
'type' => is_string( $types ) ? $types : null
|
|
]
|
|
);
|
|
}
|
|
|
|
public function getAllowedParams() {
|
|
return [
|
|
'page' => [
|
|
ApiBase::PARAM_REQUIRED => true,
|
|
],
|
|
'format' => [
|
|
ApiBase::PARAM_DFLT => 'jsonfm',
|
|
ApiBase::PARAM_TYPE => [ 'json', 'jsonfm' ],
|
|
],
|
|
'paction' => [
|
|
ApiBase::PARAM_REQUIRED => true,
|
|
ApiBase::PARAM_TYPE => [
|
|
'parse',
|
|
'metadata',
|
|
'parsefragment',
|
|
'serialize',
|
|
'serializeforcache',
|
|
'diff',
|
|
'getlanglinks',
|
|
],
|
|
],
|
|
'wikitext' => null,
|
|
'oldid' => null,
|
|
'html' => null,
|
|
'etag' => null,
|
|
'cachekey' => null,
|
|
'pst' => false,
|
|
];
|
|
}
|
|
|
|
public function needsToken() {
|
|
return false;
|
|
}
|
|
|
|
public function mustBePosted() {
|
|
return false;
|
|
}
|
|
|
|
public function isInternal() {
|
|
return true;
|
|
}
|
|
|
|
public function isWriteMode() {
|
|
return true;
|
|
}
|
|
}
|