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|
<?php
/**
* Parsoid/RESTBase+MediaWiki API wrapper.
*
* @file
* @ingroup Extensions
* @copyright 2011-2020 VisualEditor Team and others; see AUTHORS.txt
* @license MIT
*/
use MediaWiki\Block\DatabaseBlock;
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
class ApiVisualEditor extends ApiBase {
use ApiBlockInfoTrait;
use ApiParsoidTrait;
/**
* @inheritDoc
*/
public function __construct( ApiMain $main, $name ) {
parent::__construct( $main, $name );
$this->setLogger( LoggerFactory::getInstance( 'VisualEditor' ) );
}
/**
* Run wikitext through the parser's Pre-Save-Transform
*
* @param Title $title The title of the page to use as the parsing context
* @param string $wikitext The wikitext to transform
* @return string The transformed wikitext
*/
protected function pstWikitext( Title $title, $wikitext ) {
return ContentHandler::makeContent( $wikitext, $title, CONTENT_MODEL_WIKITEXT )
->preSaveTransform(
$title,
$this->getUser(),
WikiPage::factory( $title )->makeParserOptions( $this->getContext() )
)
->serialize( 'text/x-wiki' );
}
/**
* Provide the RESTbase-parsed HTML of a given fragment of wikitext
*
* @param Title $title The title of the page to use as the parsing context
* @param string $wikitext The wikitext fragment to parse
* @param bool $bodyOnly Whether to provide only the contents of the `<body>` tag
* @param int|null $oldid What oldid revision, if any, to base the request from (default: `null`)
* @param bool $stash Whether to stash the result in the server-side cache (default: `false`)
* @return array The RESTbase server's response, 'code', 'reason', 'headers' and 'body'
*/
protected function parseWikitextFragment(
Title $title, $wikitext, $bodyOnly, $oldid = null, $stash = false
) {
return $this->requestRestbase(
$title,
'POST',
'transform/wikitext/to/html/' . urlencode( $title->getPrefixedDBkey() ) .
( $oldid === null ? '' : '/' . $oldid ),
[
'wikitext' => $wikitext,
'body_only' => $bodyOnly ? 1 : 0,
'stash' => $stash ? 1 : 0
]
);
}
/**
* Provide the preload content for a page being created from another page
*
* @param string $preload The title of the page to use as the preload content
* @param string[] $params The preloadTransform parameters to pass in, if any
* @param Title $contextTitle The contextual page title against which to parse the preload
* @return string Wikitext content
*/
protected function getPreloadContent( $preload, $params, Title $contextTitle ) {
$content = '';
$preloadTitle = Title::newFromText( $preload );
// Check for existence to avoid getting MediaWiki:Noarticletext
if (
$preloadTitle instanceof Title &&
$preloadTitle->exists() &&
$this->getPermissionManager()->userCan( 'read', $this->getUser(), $preloadTitle )
) {
$preloadPage = WikiPage::factory( $preloadTitle );
if ( $preloadPage->isRedirect() ) {
$preloadTitle = $preloadPage->getRedirectTarget();
$preloadPage = WikiPage::factory( $preloadTitle );
}
$content = $preloadPage->getContent( RevisionRecord::RAW );
$parserOptions = ParserOptions::newFromUser( $this->getUser() );
$content = $content->preloadTransform(
$preloadTitle,
$parserOptions,
(array)$params
)->serialize();
}
return $content;
}
/**
* @inheritDoc
* @suppress PhanPossiblyUndeclaredVariable False positives
*/
public function execute() {
$user = $this->getUser();
$params = $this->extractRequestParams();
$permissionManager = $this->getPermissionManager();
$title = Title::newFromText( $params['page'] );
if ( $title && $title->isSpecial( 'CollabPad' ) ) {
// Convert Special:CollabPad/MyPage to MyPage so we can parsefragment properly
$title = SpecialCollabPad::getSubPage( $title );
}
if ( !$title ) {
$this->dieWithError( [ 'apierror-invalidtitle', wfEscapeWikiText( $params['page'] ) ] );
}
'@phan-var Title $title';
$parserParams = [];
if ( isset( $params['oldid'] ) ) {
$parserParams['oldid'] = $params['oldid'];
}
wfDebugLog( 'visualeditor', "called on '$title' with paction: '{$params['paction']}'" );
switch ( $params['paction'] ) {
case 'parse':
case 'wikitext':
case 'metadata':
// Dirty hack to provide the correct context for edit notices
// FIXME Don't write to globals! Eww.
global $wgTitle;
$wgTitle = $title;
RequestContext::getMain()->setTitle( $title );
$preloaded = false;
$restbaseHeaders = null;
// Get information about current revision
if ( $title->exists() ) {
$revision = $this->getValidRevision( $title, $parserParams['oldid'] ?? null );
$latestRevision = $this->getLatestRevision( $title );
$restoring = !$revision->isCurrent();
$baseTimestamp = $latestRevision->getTimestamp();
$oldid = $revision->getId();
// If requested, request HTML from Parsoid/RESTBase
if ( $params['paction'] === 'parse' ) {
$wikitext = $params['wikitext'] ?? null;
if ( $wikitext !== null ) {
$stash = $params['stash'];
$section = $params['section'] ?? null;
if ( $params['pst'] ) {
$wikitext = $this->pstWikitext( $title, $wikitext );
}
if ( $section !== null ) {
$sectionContent = new WikitextContent( $wikitext );
$page = WikiPage::factory( $title );
$newSectionContent = $page->replaceSectionAtRev(
$section, $sectionContent, '', $oldid
);
'@phan-var WikitextContent $newSectionContent';
$wikitext = $newSectionContent->getText();
}
$response = $this->parseWikitextFragment(
$title, $wikitext, false, $oldid, $stash
);
} else {
$response = $this->requestRestbasePageHtml( $revision );
}
$content = $response['body'];
$restbaseHeaders = $response['headers'];
if ( $content === false ) {
$this->dieWithError( 'apierror-visualeditor-docserver', 'docserver' );
}
} elseif ( $params['paction'] === 'wikitext' ) {
$apiParams = [
'action' => 'query',
'revids' => $oldid,
'prop' => 'revisions',
'rvprop' => 'content|ids'
];
$section = $params['section'] ?? null;
if ( $section === 'new' ) {
$content = '';
if ( !empty( $params['preload'] ) ) {
$content = $this->getPreloadContent(
$params['preload'], $params['preloadparams'], $title
);
$preloaded = true;
}
} else {
$apiParams['rvsection'] = $section;
$api = new ApiMain(
new DerivativeRequest(
$this->getRequest(),
$apiParams,
/* was posted? */ false
),
/* enable write? */ true
);
$api->execute();
$result = $api->getResult()->getResultData();
$pid = $title->getArticleID();
$content = false;
if ( isset( $result['query']['pages'][$pid]['revisions'] ) ) {
foreach ( $result['query']['pages'][$pid]['revisions'] as $revArr ) {
// Check 'revisions' is an array (T193718)
if ( is_array( $revArr ) && $revArr['revid'] === $oldid ) {
$content = $revArr['content'];
}
}
}
if ( $content === false ) {
$this->dieWithError( 'apierror-visualeditor-docserver', 'docserver' );
}
}
}
} else {
if ( isset( $params['wikitext'] ) ) {
$content = $params['wikitext'];
if ( $params['pst'] ) {
$content = $this->pstWikitext( $title, $content );
}
} else {
$content = '';
if ( $title->getNamespace() == NS_MEDIAWIKI && $params['section'] !== 'new' ) {
// If this is a system message, get the default text.
$content = $title->getDefaultMessageText();
}
Hooks::run( 'EditFormPreloadText', [ &$content, &$title ] );
if ( $content === '' && !empty( $params['preload'] ) ) {
$content = $this->getPreloadContent(
$params['preload'], $params['preloadparams'], $title
);
$preloaded = true;
}
}
if ( $content !== '' && $params['paction'] !== 'wikitext' ) {
$response = $this->parseWikitextFragment( $title, $content, false, null, true );
$content = $response['body'];
$restbaseHeaders = $response['headers'];
}
$baseTimestamp = wfTimestampNow();
$oldid = 0;
$restoring = false;
}
// Get edit notices
$notices = $title->getEditNotices();
// Anonymous user notice
if ( $user->isAnon() ) {
$notices[] = $this->msg(
'anoneditwarning',
// Log-in link
'{{fullurl:Special:UserLogin|returnto={{FULLPAGENAMEE}}}}',
// Sign-up link
'{{fullurl:Special:UserLogin/signup|returnto={{FULLPAGENAMEE}}}}'
)->parseAsBlock();
}
// From EditPage#showCustomIntro
if ( $params['editintro'] ) {
$eiTitle = Title::newFromText( $params['editintro'] );
if (
$eiTitle instanceof Title &&
$eiTitle->exists() &&
$permissionManager->userCan( 'read', $user, $eiTitle )
) {
$notices[] = MediaWikiServices::getInstance()->getParser()->parse(
'<div class="mw-editintro">{{:' . $eiTitle->getFullText() . '}}</div>',
$title,
new ParserOptions( $user )
)->getText();
}
}
// Old revision notice
if ( $restoring ) {
$notices[] = $this->msg( 'editingold' )->parseAsBlock();
}
if ( wfReadOnly() ) {
$notices[] = $this->msg( 'readonlywarning', wfReadOnlyReason() );
}
// Edit notices about the page being protected (only used when we're allowed to edit it;
// otherwise, a generic permission error is displayed via #getUserPermissionsErrors)
$protectionNotices = [];
// New page notices
if ( !$title->exists() ) {
$notices[] = $this->msg(
$user->isLoggedIn() ? 'newarticletext' : 'newarticletextanon',
wfExpandUrl( Skin::makeInternalOrExternalUrl(
$this->msg( 'helppage' )->inContentLanguage()->text()
) )
)->parseAsBlock();
// Page protected from creation
if ( $title->getRestrictions( 'create' ) ) {
$protectionNotices[] = $this->msg( 'titleprotectedwarning' )->parseAsBlock() .
$this->getLastLogEntry( $title, 'protect' );
}
// From EditPage#showIntro, checking if the page has previously been deleted:
$dbr = wfGetDB( DB_REPLICA );
LogEventsList::showLogExtract( $out, [ 'delete', 'move' ], $title,
'',
[
'lim' => 10,
'conds' => [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ],
'showIfEmpty' => false,
'msgKey' => [ 'recreate-moveddeleted-warn' ]
]
);
if ( $out ) {
$notices[] = $out;
}
}
// Look at protection status to set up notices + surface class(es)
$protectedClasses = [];
if (
$permissionManager->getNamespaceRestrictionLevels( $title->getNamespace() ) !== [ '' ]
) {
// Page protected from editing
if ( $title->isProtected( 'edit' ) ) {
// Is the title semi-protected?
if ( $title->isSemiProtected() ) {
$protectedClasses[] = 'mw-textarea-sprotected';
$noticeMsg = 'semiprotectedpagewarning';
} else {
$protectedClasses[] = 'mw-textarea-protected';
// Then it must be protected based on static groups (regular)
$noticeMsg = 'protectedpagewarning';
}
$protectionNotices[] = $this->msg( $noticeMsg )->parseAsBlock() .
$this->getLastLogEntry( $title, 'protect' );
}
// Deal with cascading edit protection
list( $sources, $restrictions ) = $title->getCascadeProtectionSources();
if ( isset( $restrictions['edit'] ) ) {
$protectedClasses[] = ' mw-textarea-cprotected';
$notice = $this->msg( 'cascadeprotectedwarning', count( $sources ) )->parseAsBlock() . '<ul>';
// Unfortunately there's no nice way to get only the pages which cause
// editing to be restricted
foreach ( $sources as $source ) {
$notice .= "<li>" .
MediaWikiServices::getInstance()->getLinkRenderer()->makeLink( $source ) .
"</li>";
}
$notice .= '</ul>';
$protectionNotices[] = $notice;
}
}
// Simplified EditPage::getEditPermissionErrors()
$permErrors = $permissionManager->getPermissionErrors( 'edit', $user, $title, 'full' );
if ( !$title->exists() ) {
$permErrors = array_merge(
$permErrors,
wfArrayDiff2(
$permissionManager->getPermissionErrors( 'create', $user, $title, 'full' ),
$permErrors
)
);
}
if ( $permErrors ) {
// Show generic permission errors, including page protection, user blocks, etc.
$notice = $this->getOutput()->formatPermissionsErrorMessage( $permErrors, 'edit' );
// That method returns wikitext (eww), hack to get it parsed:
$notice = ( new RawMessage( '$1', [ $notice ] ) )->parseAsBlock();
$notices[] = $notice;
} elseif ( $protectionNotices ) {
// If we can edit, and the page is protected, then show the details about the protection
$notices = array_merge( $notices, $protectionNotices );
}
// Will be false e.g. if user is blocked or page is protected
$canEdit = !$permErrors;
// Show notice when editing user / user talk page of a user that doesn't exist
// or who is blocked
// HACK of course this code is partly duplicated from EditPage.php :(
if ( $title->getNamespace() == NS_USER || $title->getNamespace() == NS_USER_TALK ) {
$parts = explode( '/', $title->getText(), 2 );
$targetUsername = $parts[0];
$targetUser = User::newFromName(
$targetUsername,
/* allow IP users*/ false
);
$block = $targetUser->getBlock();
$targetUserExists = ( $targetUser && $targetUser->isLoggedIn() );
if ( $targetUserExists && $targetUser->isHidden() &&
!$permissionManager->userHasRight( $user, 'hideuser' )
) {
// If the user exists, but is hidden, and the viewer cannot see hidden
// users, pretend like they don't exist at all. See T120883/T270453
$targetUserExists = false;
}
if ( !$targetUserExists && !User::isIP( $targetUsername ) ) {
// User does not exist
$notices[] = "<div class=\"mw-userpage-userdoesnotexist error\">\n" .
$this->msg( 'userpage-userdoesnotexist', wfEscapeWikiText( $targetUsername ) )
->parse() .
"\n</div>";
} elseif (
$block !== null &&
$block->getType() != DatabaseBlock::TYPE_AUTO &&
( $block->isSitewide() || $targetUser->isBlockedFrom( $title ) )
) {
// Show log extract if the user is sitewide blocked or is partially
// blocked and not allowed to edit their user page or user talk page
$notices[] = $this->msg(
'blocked-notice-logextract',
// Support GENDER in notice
$targetUser->getName()
)->parseAsBlock() . $this->getLastLogEntry( $targetUser->getUserPage(), 'block' );
}
}
$block = null;
$blockinfo = null;
// Blocked user notice
if ( $user->isBlockedGlobally() ) {
$block = $user->getGlobalBlock();
} elseif ( $permissionManager->isBlockedFrom( $user, $title, true ) ) {
$block = $user->getBlock();
}
if ( $block ) {
// Already added to $notices via #getPermissionErrors above.
// Add block info for MobileFrontend:
$blockinfo = $this->getBlockDetails( $block );
}
// HACK: Build a fake EditPage so we can get checkboxes from it
// Deliberately omitting ,0 so oldid comes from request
$article = new Article( $title );
$editPage = new EditPage( $article );
$req = $this->getRequest();
$req->setVal( 'format', $editPage->contentFormat );
// By reference for some reason (T54466)
$editPage->importFormData( $req );
$states = [
'minor' => $user->getOption( 'minordefault' ) && $title->exists(),
'watch' => $user->getOption( 'watchdefault' ) ||
( $user->getOption( 'watchcreations' ) && !$title->exists() ) ||
$user->isWatched( $title ),
];
$checkboxesDef = $editPage->getCheckboxesDefinition( $states );
$checkboxesMessagesList = [];
foreach ( $checkboxesDef as $name => &$options ) {
if ( isset( $options['tooltip'] ) ) {
$checkboxesMessagesList[] = "accesskey-{$options['tooltip']}";
$checkboxesMessagesList[] = "tooltip-{$options['tooltip']}";
}
if ( isset( $options['title-message'] ) ) {
$checkboxesMessagesList[] = $options['title-message'];
if ( !is_string( $options['title-message'] ) ) {
// Extract only the key. Any parameters are included in the fake message definition
// passed via $checkboxesMessages. (This changes $checkboxesDef by reference.)
$options['title-message'] = $this->msg( $options['title-message'] )->getKey();
}
}
$checkboxesMessagesList[] = $options['label-message'];
if ( !is_string( $options['label-message'] ) ) {
// Extract only the key. Any parameters are included in the fake message definition
// passed via $checkboxesMessages. (This changes $checkboxesDef by reference.)
$options['label-message'] = $this->msg( $options['label-message'] )->getKey();
}
}
$checkboxesMessages = [];
foreach ( $checkboxesMessagesList as $messageSpecifier ) {
// $messageSpecifier may be a string or a Message object
$message = $this->msg( $messageSpecifier );
$checkboxesMessages[ $message->getKey() ] = $message->plain();
}
foreach ( $checkboxesDef as &$value ) {
// Don't convert the boolean to empty string with formatversion=1
$value[ApiResult::META_BC_BOOLS] = [ 'default' ];
}
$result = [
'result' => 'success',
'notices' => $notices,
'checkboxesDef' => $checkboxesDef,
'checkboxesMessages' => $checkboxesMessages,
'protectedClasses' => implode( ' ', $protectedClasses ),
'basetimestamp' => $baseTimestamp,
'starttimestamp' => wfTimestampNow(),
'oldid' => $oldid,
'blockinfo' => $blockinfo,
'canEdit' => $canEdit,
];
if ( isset( $restbaseHeaders['etag'] ) ) {
$result['etag'] = $restbaseHeaders['etag'];
}
if ( isset( $params['badetag'] ) ) {
$badetag = $params['badetag'];
$goodetag = $result['etag'] ?? '';
$this->getLogger()->info(
__METHOD__ . ": Client reported bad ETag: {badetag}, expected: {goodetag}",
[
'badetag' => $badetag,
'goodetag' => $goodetag,
]
);
}
if ( $params['paction'] === 'parse' ||
$params['paction'] === 'wikitext' ||
( !empty( $params['preload'] ) && isset( $content ) )
) {
$result['content'] = $content;
if ( $preloaded ) {
// If the preload param was actually used, pass it
// back so the caller knows. (It's not obvious to the
// caller, because in some situations it'll depend on
// whether the page has been created. They can work it
// out from some of the other returns, but this is
// simpler.)
$result['preloaded'] = $params['preload'];
}
}
break;
case 'templatesused':
// HACK: Build a fake EditPage so we can get checkboxes from it
// Deliberately omitting ,0 so oldid comes from request
$article = new Article( $title );
$editPage = new EditPage( $article );
$result = $editPage->makeTemplatesOnThisPageList( $editPage->getTemplates() );
break;
case 'parsedoc':
case 'parsefragment':
$wikitext = $params['wikitext'];
$bodyOnly = ( $params['paction'] === 'parsefragment' );
if ( $params['pst'] ) {
$wikitext = $this->pstWikitext( $title, $wikitext );
}
$content = $this->parseWikitextFragment(
$title, $wikitext, $bodyOnly
)['body'];
if ( $content === false ) {
$this->dieWithError( 'apierror-visualeditor-docserver', 'docserver' );
} else {
$result = [
'result' => 'success',
'content' => $content
];
}
break;
}
$this->getResult()->addValue( null, $this->getModuleName(), $result );
}
/**
* Check if the configured allowed namespaces include the specified namespace
*
* @param Config $config Configuration object
* @param int $namespaceId Namespace ID
* @return bool
*/
public static function isAllowedNamespace( Config $config, $namespaceId ) {
$availableNamespaces = self::getAvailableNamespaceIds( $config );
return in_array( $namespaceId, $availableNamespaces );
}
/**
* Get a list of allowed namespace IDs
*
* @param Config $config Configuration object
* @return array
*/
public static function getAvailableNamespaceIds( Config $config ) {
$availableNamespaces =
// Note: existing numeric keys might exist, and so array_merge cannot be used
(array)$config->get( 'VisualEditorAvailableNamespaces' ) +
(array)ExtensionRegistry::getInstance()->getAttribute( 'VisualEditorAvailableNamespaces' );
return array_values( array_unique( array_map( function ( $namespace ) {
// Convert canonical namespace names to IDs
$nsInfo = MediaWikiServices::getInstance()->getNamespaceInfo();
$idFromName = $nsInfo->getCanonicalIndex( strtolower( $namespace ) );
if ( $idFromName !== null ) {
return $idFromName;
}
// Allow namespaces to be specified by ID as well
return $nsInfo->exists( $namespace ) ? $namespace : null;
}, array_keys( array_filter( $availableNamespaces ) ) ) ) );
}
/**
* Check if the configured allowed content models include the specified content model
*
* @param Config $config Configuration object
* @param string $contentModel Content model ID
* @return bool
*/
public static function isAllowedContentType( Config $config, $contentModel ) {
$availableContentModels = array_merge(
ExtensionRegistry::getInstance()->getAttribute( 'VisualEditorAvailableContentModels' ),
$config->get( 'VisualEditorAvailableContentModels' )
);
return isset( $availableContentModels[$contentModel] ) &&
$availableContentModels[$contentModel];
}
/**
* Gets the relevant HTML for the latest log entry on a given title, including a full log link.
*
* @param Title $title Title
* @param array|string $types
* @return string
*/
private function getLastLogEntry( Title $title, $types = '' ) {
$outString = '';
LogEventsList::showLogExtract( $outString, $types, $title, '',
[ 'lim' => 1 ] );
return $outString;
}
/**
* @inheritDoc
*/
public function getAllowedParams() {
return [
'page' => [
ApiBase::PARAM_REQUIRED => true,
],
'badetag' => null,
'format' => [
ApiBase::PARAM_DFLT => 'jsonfm',
ApiBase::PARAM_TYPE => [ 'json', 'jsonfm' ],
],
'paction' => [
ApiBase::PARAM_REQUIRED => true,
ApiBase::PARAM_TYPE => [
'parse',
'metadata',
'templatesused',
'wikitext',
'parsefragment',
'parsedoc',
],
],
'wikitext' => [
ApiBase::PARAM_TYPE => 'text',
ApiBase::PARAM_DFLT => null,
],
'section' => null,
'stash' => null,
'oldid' => null,
'editintro' => null,
'pst' => false,
'preload' => null,
'preloadparams' => [
ApiBase::PARAM_ISMULTI => true,
],
];
}
/**
* @inheritDoc
*/
public function needsToken() {
return false;
}
/**
* @inheritDoc
*/
public function mustBePosted() {
return false;
}
/**
* @inheritDoc
*/
public function isInternal() {
return true;
}
/**
* @inheritDoc
*/
public function isWriteMode() {
return false;
}
}
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