mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/VisualEditor
synced 2024-11-15 18:39:52 +00:00
263 lines
9.2 KiB
PHP
263 lines
9.2 KiB
PHP
<?php
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/**
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* Helper functions for using the REST interface to Parsoid/RESTBase.
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*
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* @file
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* @ingroup Extensions
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* @copyright 2022 VisualEditor Team and others; see AUTHORS.txt
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* @license MIT
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*/
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namespace MediaWiki\Extension\VisualEditor;
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use Language;
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use MediaWiki\MediaWikiServices;
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use MediaWiki\Parser\Parsoid\Config\PageConfigFactory;
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use MediaWiki\Revision\MutableRevisionRecord;
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use MediaWiki\Revision\RevisionRecord;
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use MediaWiki\Revision\SlotRecord;
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use ParserOutput;
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use RequestContext;
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use Title;
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use UIDGenerator;
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use WikiMap;
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use Wikimedia\Parsoid\Config\DataAccess;
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use Wikimedia\Parsoid\Config\SiteConfig;
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use Wikimedia\Parsoid\Core\SelserData;
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use Wikimedia\Parsoid\Parsoid;
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use Wikimedia\Parsoid\Utils\DOMUtils;
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use WikitextContent;
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class VisualEditorParsoidClient {
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/**
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* Requested Parsoid HTML version.
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* Keep this in sync with the Accept: header in
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* ve.init.mw.ArticleTargetLoader.js
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*/
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public const PARSOID_VERSION = '2.4.0';
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/** @var array Parsoid-specific settings array from $config */
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private $parsoidSettings;
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/** @var SiteConfig */
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protected $siteConfig;
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/** @var PageConfigFactory */
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protected $pageConfigFactory;
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/** @var DataAccess */
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protected $dataAccess;
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/**
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* @return static
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*/
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public static function factory(): VisualEditorParsoidClient {
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$services = MediaWikiServices::getInstance();
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return new static(
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$services->getMainConfig()->get( 'ParsoidSettings' ),
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$services->getParsoidSiteConfig(),
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$services->getParsoidPageConfigFactory(),
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$services->getParsoidDataAccess()
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);
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}
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/**
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* @param array $parsoidSettings
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* @param SiteConfig $siteConfig
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* @param PageConfigFactory $pageConfigFactory
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* @param DataAccess $dataAccess
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*/
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public function __construct(
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array $parsoidSettings,
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SiteConfig $siteConfig,
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PageConfigFactory $pageConfigFactory,
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DataAccess $dataAccess
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) {
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$this->parsoidSettings = $parsoidSettings;
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$this->siteConfig = $siteConfig;
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$this->pageConfigFactory = $pageConfigFactory;
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$this->dataAccess = $dataAccess;
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}
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/**
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* Request page HTML
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*
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* @param RevisionRecord $revision Page revision
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* @param Language $pageLanguage Page language
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* @return array The response
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*/
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public function getPageHtml( RevisionRecord $revision, Language $pageLanguage ): array {
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$title = Title::newFromLinkTarget( $revision->getPageAsLinkTarget() );
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$oldid = $revision->getId();
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$lang = $pageLanguage->getCode();
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// This is /page/html/$title/$revision?redirect=false&stash=true
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// With Accept-Language: $lang
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$envOptions = [
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// $attribs['envOptions'] is created in ParsoidHandler::getRequestAttributes()
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'prefix' => WikiMap::getCurrentWikiId(),
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'pageName' => $title->getPrefixedDBkey(),
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'htmlVariantLanguage' => $lang,
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'outputContentVersion' => Parsoid::resolveContentVersion(
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self::PARSOID_VERSION
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) ?? Parsoid::defaultHTMLVersion(),
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];
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// $pageConfig originally created in
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// ParsoidHandler::tryToCreatePageConfig
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$user = RequestContext::getMain()->getUser();
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// Note: Parsoid by design isn't supposed to use the user
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// context right now, and all user state is expected to be
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// introduced as a post-parse transform. So although we pass a
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// User here, it only currently affects the output in obscure
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// corner cases; see PageConfigFactory::create() for more.
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$pageConfig = $this->pageConfigFactory->create(
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$title, $user, $revision, null, $lang, $this->parsoidSettings
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);
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if ( $pageConfig->getRevisionContent() === null ) {
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throw new \LogicException( "Specified revision does not exist" );
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}
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$parsoid = new Parsoid( $this->siteConfig, $this->dataAccess );
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$parserOutput = new ParserOutput();
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// Note that $headers is an out parameter
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// $envOptions originally included $opts['contentmodel'] here as well
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$out = $parsoid->wikitext2html(
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$pageConfig, $envOptions, $headers, $parserOutput
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);
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$tid = UIDGenerator::newUUIDv1();
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$etag = "W/\"{$oldid}/{$tid}\"";
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# XXX: we could cache this locally using the $etag as a key,
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# then reuse it when transforming back to wikitext below.
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return [
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'body' => $out,
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'headers' => $headers + [
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'etag' => $etag,
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],
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];
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}
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/**
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* Transform HTML to wikitext via Parsoid
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*
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* @param Title $title The title of the page
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* @param Language $pageLanguage Page language
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* @param string $html The HTML of the page to be transformed
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* @param ?int $oldid What oldid revision, if any, to base the request from (default: `null`)
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* @param ?string $etag The ETag to set in the HTTP request header
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* @return array The response, 'code', 'reason', 'headers' and 'body'
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*/
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public function transformHTML(
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Title $title, Language $pageLanguage, string $html, ?int $oldid, ?string $etag
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): array {
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// This is POST /transform/html/to/wikitext/$title/$oldid
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// with header If-Match: $etag
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// and data: [ 'html' => $html ]
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$lang = $pageLanguage->getCode();
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// $pageConfig originally created in
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// ParsoidHandler::tryToCreatePageConfig
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$user = RequestContext::getMain()->getUser();
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// Note: Parsoid by design isn't supposed to use the user
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// context right now, and all user state is expected to be
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// introduced as a post-parse transform. So although we pass a
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// User here, it only currently affects the output in obscure
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// corner cases; see PageConfigFactory::create() for more.
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$pageConfig = $this->pageConfigFactory->create(
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$title, $user, $oldid, null, $lang, $this->parsoidSettings
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);
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$doc = DOMUtils::parseHTML( $html, true );
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$vEdited = DOMUtils::extractInlinedContentVersion( $doc ) ??
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Parsoid::defaultHTMLVersion();
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// T267990: This should be replaced by PET's ParserCache/stash
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// mechanism. (RESTBase did the fetch based on the etag, and then
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// compared vEdited to vOriginal to determine if it was usable.)
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$oldHtml = null;
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$selserData = ( $oldid === null ) ? null : new SelserData(
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$pageConfig->getPageMainContent(), $oldHtml
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);
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$parsoid = new Parsoid( $this->siteConfig, $this->dataAccess );
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$wikitext = $parsoid->dom2wikitext( $pageConfig, $doc, [
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'inputContentVersion' => $vEdited,
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'htmlSize' => mb_strlen( $html ),
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], $selserData );
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return [
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'body' => $wikitext,
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];
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}
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/**
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* Transform wikitext to HTML via Parsoid.
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*
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* @param Title $title The title of the page to use as the parsing context
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* @param Language $pageLanguage Page language
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* @param string $wikitext The wikitext fragment to parse
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* @param bool $bodyOnly Whether to provide only the contents of the `<body>` tag
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* @param ?int $oldid What oldid revision, if any, to base the request from (default: `null`)
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* @param bool $stash Whether to stash the result in the server-side cache (default: `false`)
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* @return array The response, 'code', 'reason', 'headers' and 'body'
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*/
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public function transformWikitext(
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Title $title, Language $pageLanguage, string $wikitext,
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bool $bodyOnly, ?int $oldid, bool $stash
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): array {
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// This is POST /transform/wikitext/to/html/$title/$oldid
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// with data: [
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// 'wikitext' => $wikitext,
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// 'body_only' => $bodyOnly,
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// 'stash' => $stash,
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// ]
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// T267990: Stashing features are not implemented in zero-conf mode;
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// they will eventually be replaced by PET's ParserCache/stash mechanism
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$lang = $pageLanguage->getCode();
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$envOptions = [
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// $attribs['envOptions'] is created in ParsoidHandler::getRequestAttributes()
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'prefix' => WikiMap::getCurrentWikiId(),
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'pageName' => $title->getPrefixedDBkey(),
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'htmlVariantLanguage' => $lang,
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'outputContentVersion' => Parsoid::resolveContentVersion(
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self::PARSOID_VERSION
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) ?? Parsoid::defaultHTMLVersion(),
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'body_only' => $bodyOnly,
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// When VE does a fragment expansion (for example when
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// template arguments are edited and it wants an updated
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// render of the template) it's not going to want section
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// tags; in this case bodyOnly=true and wrapSections=false.
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// (T181226)
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// But on the other hand, VE doesn't do anything with section
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// tags right now other than strip them, so we'll just always
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// pass wrapSections=false for now.
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'wrapSections' => false,
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];
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// $pageConfig originally created in
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// ParsoidHandler::tryToCreatePageConfig
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$user = RequestContext::getMain()->getUser();
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// Note: Parsoid by design isn't supposed to use the user
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// context right now, and all user state is expected to be
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// introduced as a post-parse transform. So although we pass a
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// User here, it only currently affects the output in obscure
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// corner cases; see PageConfigFactory::create() for more.
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// Create a mutable revision record and set to the desired wikitext.
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$tmpRevision = new MutableRevisionRecord( $title );
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$tmpRevision->setSlot(
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SlotRecord::newUnsaved(
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SlotRecord::MAIN,
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new WikitextContent( $wikitext )
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)
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);
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$pageConfig = $this->pageConfigFactory->create(
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$title, $user, $tmpRevision, null, $lang, $this->parsoidSettings
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);
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$parsoid = new Parsoid( $this->siteConfig, $this->dataAccess );
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$parserOutput = new ParserOutput();
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// Note that $headers is an out parameter
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$out = $parsoid->wikitext2html(
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$pageConfig, $envOptions, $headers, $parserOutput
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);
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// No etag generation in this pathway, and no caching
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// This is just used to update previews when you edit a template
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return [
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'body' => $out,
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'headers' => $headers,
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];
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}
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}
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