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EventDispatcher: Ensure we fetch page content from the primary database

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We used an internal API requests to fetch page content because it was
easy, but there's no way to guarantee that it returns data from the
primary database.

Use ParserOutputAccess::getParserOutput() to fetch from cache if
available. Also, use canonical output instead of user-specific,
not that it should matter.

Bug: T285895
Change-Id: I7dcd9659be77746dc2a0c4eeae2319887936b555
This commit is contained in:
Bartosz Dziewoński 2021-06-30 22:24:29 +02:00
parent 12f5a5365e
commit 37d6825c14
1 changed files with 21 additions and 16 deletions
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37
includes/Notifications/EventDispatcher.php
View file

@ -9,11 +9,9 @@
namespace MediaWiki\Extension\DiscussionTools\Notifications;
use ApiMain;
use DOMElement;
use EchoEvent;
use Error;
use FauxRequest;
use IDBAccessObject;
use Iterator;
use MediaWiki\Extension\DiscussionTools\CommentParser;
@ -22,30 +20,37 @@ use MediaWiki\Extension\DiscussionTools\SubscriptionItem;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\User\UserIdentity;
use ParserOptions;
use Title;
use Wikimedia\Assert\Assert;
use Wikimedia\Parsoid\Utils\DOMUtils;
class EventDispatcher {
/**
* @param RevisionRecord $revision
* @param RevisionRecord $revRecord
* @return CommentParser
*/
private static function getParsedRevision( RevisionRecord $revision ) : CommentParser {
$api = new ApiMain(
new FauxRequest(
[
'action' => 'parse',
'oldid' => $revision->getId()
],
/* was posted? */ true
),
/* enable write? */ true
private static function getParsedRevision( RevisionRecord $revRecord ) : CommentParser {
$services = MediaWikiServices::getInstance();
$pageRecord = $services->getPageStore()->getPageByReference( $revRecord->getPage() );
Assert::postcondition( $pageRecord !== null, 'Revision had no page' );
// If the $revRecord was fetched from the primary database, this will also fetch the content
// from the primary database (using the same query flags)
$status = $services->getParserOutputAccess()->getParserOutput(
$pageRecord,
ParserOptions::newCanonical( 'canonical' ),
$revRecord
);
if ( !$status->isOK() ) {
throw new Error( 'Could not load revision for notifications' );
}
$api->execute();
$data = $api->getResult()->getResultData();
$parserOutput = $status->getValue();
$html = $parserOutput->getText();
$doc = DOMUtils::parseHTML( $data['parse']['text'] );
$doc = DOMUtils::parseHTML( $html );
$container = $doc->getElementsByTagName( 'body' )->item( 0 );
if ( !( $container instanceof DOMElement ) ) {
throw new Error( 'Could not load revision for notifications' );