mediawiki-extensions-Discus.../includes/Hooks/HookUtils.php

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<?php
/**
* DiscussionTools extension hooks
*
* @file
* @ingroup Extensions
* @license MIT
*/
namespace MediaWiki\Extension\DiscussionTools\Hooks;
use ExtensionRegistry;
use IContextSource;
use IDBAccessObject;
use MediaWiki\Extension\DiscussionTools\CommentUtils;
use MediaWiki\Extension\DiscussionTools\ContentThreadItemSet;
use MediaWiki\Extension\Gadgets\GadgetRepo;
use MediaWiki\Linker\LinkTarget;
use MediaWiki\MediaWikiServices;
use MediaWiki\Parser\Parsoid\ParsoidOutputAccess;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\User\UserIdentity;
use MWException;
use OutputPage;
use ParserOptions;
use RequestContext;
use Title;
use TitleValue;
use Wikimedia\Assert\Assert;
use Wikimedia\Parsoid\Core\ClientError;
use Wikimedia\Parsoid\Utils\DOMCompat;
use Wikimedia\Parsoid\Utils\DOMUtils;
class HookUtils {
public const REPLYTOOL = 'replytool';
public const NEWTOPICTOOL = 'newtopictool';
public const SOURCEMODETOOLBAR = 'sourcemodetoolbar';
public const TOPICSUBSCRIPTION = 'topicsubscription';
public const AUTOTOPICSUB = 'autotopicsub';
public const VISUALENHANCEMENTS = 'visualenhancements';
public const VISUALENHANCEMENTS_REPLY = 'visualenhancements_reply';
public const VISUALENHANCEMENTS_PAGEFRAME = 'visualenhancements_pageframe';
/**
* @var string[] List of all sub-features. Will be used to generate:
* - Feature override global: $wgDiscussionTools_FEATURE
* - Body class: ext-discussiontools-FEATURE-enabled
* - User option: discussiontools-FEATURE
*/
public const FEATURES = [
// Can't use static:: in compile-time constants
self::REPLYTOOL,
self::NEWTOPICTOOL,
self::SOURCEMODETOOLBAR,
self::TOPICSUBSCRIPTION,
self::AUTOTOPICSUB,
self::VISUALENHANCEMENTS,
self::VISUALENHANCEMENTS_REPLY,
self::VISUALENHANCEMENTS_PAGEFRAME,
];
public const FEATURES_CONFLICT_WITH_GADGET = [
self::REPLYTOOL,
];
protected static array $propCache = [];
/**
* Check if a title has a page prop, and use an in-memory cache to avoid extra queries
*
* @param Title $title Title
* @param string $prop Page property
* @return bool Title has page property
*/
public static function hasPagePropCached( Title $title, string $prop ): bool {
$id = $title->getArticleId();
if ( !isset( static::$propCache[ $id ] ) ) {
static::$propCache[ $id ] = [];
}
if ( !isset( static::$propCache[ $id ][ $prop ] ) ) {
$services = MediaWikiServices::getInstance();
$props = $services->getPageProps()->getProperties( $title, $prop );
static::$propCache[ $id ][ $prop ] = isset( $props[ $id ] );
}
return static::$propCache[ $id ][ $prop ];
}
/**
* Parse a revision by using the discussion parser on the HTML provided by Parsoid.
*
* @param RevisionRecord $revRecord
* @param bool $updateParserCache Whether the parser cache should be updated on cache miss.
* May be set to false for batch operations to avoid flooding the cache.
*
* @return ContentThreadItemSet
* @throws MWException
* @throws ClientError
*/
public static function parseRevisionParsoidHtml(
RevisionRecord $revRecord,
$updateParserCache = true
): ContentThreadItemSet {
$services = MediaWikiServices::getInstance();
$mainConfig = $services->getMainConfig();
$parsoidOutputAccess = $services->getParsoidOutputAccess();
// Look up the page by ID in master. If we just used $revRecord->getPage(),
// ParsoidOutputAccess would look it up by namespace+title in replica.
$pageRecord = $services->getPageStore()->getPageById( $revRecord->getPageId() ) ?:
$services->getPageStore()->getPageById( $revRecord->getPageId(), IDBAccessObject::READ_LATEST );
Assert::postcondition( $pageRecord !== null, 'Revision had no page' );
$parserOptions = ParserOptions::newFromAnon();
$parserOptions->setRenderReason( __METHOD__ );
$status = $parsoidOutputAccess->getParserOutput(
$pageRecord,
$parserOptions,
$revRecord,
// Don't flood the parser cache
$updateParserCache ? 0 : ParsoidOutputAccess::OPT_NO_UPDATE_CACHE
);
if ( !$status->isOK() ) {
[ 'message' => $key, 'params' => $params ] = $status->getErrors()[0];
$message = wfMessage( $key, ...$params );
throw new MWException( $message->inLanguage( 'en' )->useDatabase( false )->text() );
}
$parserOutput = $status->getValue();
$html = $parserOutput->getText();
// Run the discussion parser on it
$doc = DOMUtils::parseHTML( $html );
$container = DOMCompat::getBody( $doc );
CommentUtils::unwrapParsoidSections( $container );
$parser = $services->getService( 'DiscussionTools.CommentParser' );
$title = TitleValue::newFromPage( $revRecord->getPage() );
return $parser->parse( $container, $title );
}
/**
* @param UserIdentity $user
* @param string $feature Feature to check for
* @return bool
*/
public static function featureConflictsWithGadget( UserIdentity $user, string $feature ) {
$dtConfig = MediaWikiServices::getInstance()->getConfigFactory()
->makeConfig( 'discussiontools' );
$gadgetName = $dtConfig->get( 'DiscussionToolsConflictingGadgetName' );
if ( !$gadgetName ) {
return false;
}
if ( !in_array( $feature, static::FEATURES_CONFLICT_WITH_GADGET ) ) {
return false;
}
$extensionRegistry = ExtensionRegistry::getInstance();
if ( $extensionRegistry->isLoaded( 'Gadgets' ) ) {
$gadgetsRepo = GadgetRepo::singleton();
$match = array_search( $gadgetName, $gadgetsRepo->getGadgetIds() );
if ( $match !== false ) {
try {
return $gadgetsRepo->getGadget( $gadgetName )
->isEnabled( $user );
} catch ( \InvalidArgumentException $e ) {
return false;
}
}
}
return false;
}
/**
* Check if a DiscussionTools feature is available to this user
*
* @param UserIdentity $user
* @param string|null $feature Feature to check for (one of static::FEATURES)
* Null will check for any DT feature.
* @return bool
*/
public static function isFeatureAvailableToUser( UserIdentity $user, ?string $feature = null ): bool {
$services = MediaWikiServices::getInstance();
$dtConfig = $services->getConfigFactory()->makeConfig( 'discussiontools' );
if ( !$dtConfig->get( 'DiscussionToolsEnable' ) ) {
return false;
}
if (
( $feature === static::TOPICSUBSCRIPTION || $feature === static::AUTOTOPICSUB ) &&
// Users must be logged in to use topic subscription, and Echo must be installed (T322498)
( !$user->isRegistered() || !ExtensionRegistry::getInstance()->isLoaded( 'Echo' ) )
) {
return false;
}
$optionsLookup = $services->getUserOptionsLookup();
if ( $feature ) {
// Feature-specific override
if ( $dtConfig->get( 'DiscussionTools_' . $feature ) !== 'default' ) {
// Feature setting can be 'available' or 'unavailable', overriding any BetaFeatures settings
return $dtConfig->get( 'DiscussionTools_' . $feature ) === 'available';
}
} else {
// Non-feature-specific override, check for any feature
foreach ( static::FEATURES as $feat ) {
if ( $dtConfig->get( 'DiscussionTools_' . $feat ) === 'available' ) {
return true;
}
}
}
// Being in the "test" group for this feature means it's enabled. This
// overrules the wiki's beta feature setting. (However, a user who's
// in the control group can still bypass this and enable the feature
// normally.)
$abtest = static::determineUserABTestBucket( $user, $feature );
if ( $abtest === 'test' ) {
return true;
}
// No feature-specific override found.
if ( $dtConfig->get( 'DiscussionToolsBeta' ) ) {
$betaenabled = $optionsLookup->getOption( $user, 'discussiontools-betaenable', 0 );
return (bool)$betaenabled;
}
// Assume that if BetaFeature is turned off, or user has it enabled, that
// some features are available.
// If this isn't the case, then DiscussionToolsEnable should have been set to false.
return true;
}
/**
* Check if a DiscussionTools feature is enabled by this user
*
* @param UserIdentity $user
* @param string|null $feature Feature to check for (one of static::FEATURES)
* Null will check for any DT feature.
* @return bool
*/
public static function isFeatureEnabledForUser( UserIdentity $user, ?string $feature = null ): bool {
if ( !static::isFeatureAvailableToUser( $user, $feature ) ) {
return false;
}
$services = MediaWikiServices::getInstance();
$optionsLookup = $services->getUserOptionsLookup();
if ( $feature ) {
if ( static::featureConflictsWithGadget( $user, $feature ) ) {
return false;
}
// Check for a specific feature
$enabled = $optionsLookup->getOption( $user, 'discussiontools-' . $feature );
// `null` means there is no user option for this feature, so it must be enabled
return $enabled === null ? true : $enabled;
} else {
// Check for any feature
foreach ( static::FEATURES as $feat ) {
if ( $optionsLookup->getOption( $user, 'discussiontools-' . $feat ) ) {
return true;
}
}
return false;
}
}
/**
* Work out the A/B test bucket for the current user
*
* Currently this just checks whether the user is logged in, and assigns
* them to a consistent bucket based on their ID.
*
* @param UserIdentity $user
* @param string|null $feature Feature to check for (one of static::FEATURES)
* Null will check for any DT feature.
* @return string 'test' if in the test group, 'control' if in the control group, or '' if
* they're not in the test
*/
public static function determineUserABTestBucket( UserIdentity $user, ?string $feature = null ): string {
$services = MediaWikiServices::getInstance();
$optionsManager = $services->getUserOptionsManager();
$dtConfig = $services->getConfigFactory()->makeConfig( 'discussiontools' );
$abtest = $dtConfig->get( 'DiscussionToolsABTest' );
if ( $feature ? ( $abtest == $feature ) : (bool)$abtest ) {
if ( $user->isRegistered() ) {
return $user->getId() % 2 == 0 ? 'test' : 'control';
}
// logged out
$req = RequestContext::getMain()->getRequest();
$cookie = $req->getCookie( 'DTAB', '' );
if ( $cookie ) {
return $cookie;
}
// we just want to remember this across all calls in this request
static $bucket = false;
if ( !$bucket ) {
$bucket = rand( 0, 1 ) <= 0.5 ? 'test' : 'control';
}
return $bucket;
}
return '';
}
/**
* Check if the tools are available for a given title
*
* @param Title $title
* @param string|null $feature Feature to check for (one of static::FEATURES)
* Null will check for any DT feature.
* @return bool
*/
public static function isAvailableForTitle( Title $title, ?string $feature = null ): bool {
// Only wikitext pages (e.g. not Flow boards, special pages)
if ( $title->getContentModel() !== CONTENT_MODEL_WIKITEXT ) {
return false;
}
if ( !$title->canExist() ) {
return false;
}
$services = MediaWikiServices::getInstance();
if ( $feature === static::VISUALENHANCEMENTS ) {
$dtConfig = $services->getConfigFactory()->makeConfig( 'discussiontools' );
$namespaces = $dtConfig->get( 'DiscussionTools_visualenhancements_namespaces' );
if ( is_array( $namespaces ) ) {
// Only allow visual enhancements in specified namespaces
return in_array( $title->getNamespace(), $namespaces, true );
}
}
$hasNewSectionLink = static::hasPagePropCached( $title, 'newsectionlink' );
// Check that the page supports discussions.
// Treat pages with __NEWSECTIONLINK__ as talk pages (T245890)
return $hasNewSectionLink ||
// `wantSignatures` includes talk pages
$services->getNamespaceInfo()->wantSignatures( $title->getNamespace() );
// TODO: Consider not loading if forceHideNewSectionLink is true.
}
/**
* Check if the tool is available on a given page
*
* @param OutputPage $output
* @param string|null $feature Feature to check for (one of static::FEATURES)
* Null will check for any DT feature.
* @return bool
*/
public static function isFeatureEnabledForOutput( OutputPage $output, ?string $feature = null ): bool {
// Only show on normal page views (not history etc.), and in edit mode for previews
if (
// Don't try to call $output->getActionName if testing for NEWTOPICTOOL as we use
// the hook onGetActionName to override the action for the tool on empty pages.
// If we tried to call it here it would set up infinite recursion (T312689)
$feature !== static::NEWTOPICTOOL &&
!in_array( $output->getActionName(), [ 'view', 'edit', 'submit' ] )
) {
return false;
}
$title = $output->getTitle();
// Don't show on pages without a Title
if ( !$title ) {
return false;
}
// Topic subscription is not available on your own talk page, as you will
// get 'edit-user-talk' notifications already. (T276996)
if (
( $feature === static::TOPICSUBSCRIPTION || $feature === static::AUTOTOPICSUB ) &&
$title->equals( $output->getUser()->getTalkPage() )
) {
return false;
}
// Subfeatures are disabled if the main feature is disabled
if ( (
$feature === static::VISUALENHANCEMENTS_REPLY ||
$feature === static::VISUALENHANCEMENTS_PAGEFRAME
) && !self::isFeatureEnabledForOutput( $output, static::VISUALENHANCEMENTS ) ) {
return false;
}
// ?dtenable=1 overrides all user and title checks
$queryEnable = $output->getRequest()->getRawVal( 'dtenable' ) ?:
// Extra hack for parses from API, where this parameter isn't passed to derivative requests
RequestContext::getMain()->getRequest()->getRawVal( 'dtenable' );
if ( $queryEnable ) {
return true;
}
if ( $queryEnable === '0' ) {
// ?dtenable=0 forcibly disables the feature regardless of any other checks (T285578)
return false;
}
if ( !static::isAvailableForTitle( $title, $feature ) ) {
return false;
}
$isMobile = false;
if ( ExtensionRegistry::getInstance()->isLoaded( 'MobileFrontend' ) ) {
$mobFrontContext = MediaWikiServices::getInstance()->getService( 'MobileFrontend.Context' );
$isMobile = $mobFrontContext->shouldDisplayMobileView();
}
$dtConfig = MediaWikiServices::getInstance()->getConfigFactory()->makeConfig( 'discussiontools' );
if ( $isMobile ) {
// Enabling mobile removes MobileFrontend's reply and new topic tools, so always
// enable these tools as a replacement.
return (
$dtConfig->get( 'DiscussionToolsEnableMobile' ) ||
static::determineUserABTestBucket( $output->getUser(), 'mobile' ) === 'test'
) && (
$feature === null ||
$feature === static::REPLYTOOL ||
$feature === static::NEWTOPICTOOL ||
$feature === static::SOURCEMODETOOLBAR ||
// Even though mobile ignores user preferences, TOPICSUBSCRIPTION must
// still be disabled if the user isn't registered.
( $feature === static::TOPICSUBSCRIPTION && $output->getUser()->isRegistered() ) ||
$feature === static::VISUALENHANCEMENTS ||
$feature === static::VISUALENHANCEMENTS_REPLY ||
$feature === static::VISUALENHANCEMENTS_PAGEFRAME
);
}
return static::isFeatureEnabledForUser( $output->getUser(), $feature );
}
/**
* Check if the "New section" tab would be shown in a normal skin.
*
* @param IContextSource $context
* @return bool
*/
public static function shouldShowNewSectionTab( IContextSource $context ): bool {
$title = $context->getTitle();
$output = $context->getOutput();
// Match the logic in MediaWiki core (as defined in SkinTemplate::buildContentNavigationUrlsInternal):
// https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/core/+/add6d0a0e38167a710fb47fac97ff3004451494c/includes/skins/SkinTemplate.php#1317
// * __NONEWSECTIONLINK__ is not present (OutputPage::forceHideNewSectionLink) and...
// - This is the current revision of a non-redirect in a talk namespace or...
// - __NEWSECTIONLINK__ is present (OutputPage::showNewSectionLink)
return (
!static::hasPagePropCached( $title, 'nonewsectionlink' ) &&
( ( $title->isTalkPage() && !$title->isRedirect() && $output->isRevisionCurrent() ) ||
static::hasPagePropCached( $title, 'newsectionlink' ) )
);
}
/**
* Check if this page view should open the new topic tool on page load.
*
* @param IContextSource $context
* @return bool
*/
public static function shouldOpenNewTopicTool( IContextSource $context ): bool {
$req = $context->getRequest();
$out = $context->getOutput();
return (
// ?title=...&action=edit&section=new
// ?title=...&veaction=editsource&section=new
( $req->getRawVal( 'action' ) === 'edit' || $req->getRawVal( 'veaction' ) === 'editsource' ) &&
$req->getRawVal( 'section' ) === 'new' &&
// Adding a new topic with preloaded text is not supported yet (T269310)
!(
$req->getCheck( 'editintro' ) || $req->getCheck( 'preload' ) ||
$req->getCheck( 'preloadparams' ) || $req->getCheck( 'preloadtitle' ) ||
// Switching or previewing from an external tool (T316333)
$req->getCheck( 'wpTextbox1' )
) &&
// User has new topic tool enabled (and not using &dtenable=0)
static::isFeatureEnabledForOutput( $out, static::NEWTOPICTOOL )
);
}
/**
* Check if this page view should display the "empty state" message for empty talk pages.
*
* @param IContextSource $context
* @return bool
*/
public static function shouldDisplayEmptyState( IContextSource $context ): bool {
$req = $context->getRequest();
$out = $context->getOutput();
$user = $context->getUser();
$title = $context->getTitle();
$optionsLookup = MediaWikiServices::getInstance()->getUserOptionsLookup();
return (
(
// When following a red link from another page (but not when clicking the 'Edit' tab)
(
$req->getRawVal( 'action' ) === 'edit' && $req->getRawVal( 'redlink' ) === '1' &&
// …if not disabled by the user
$optionsLookup->getOption( $user, 'discussiontools-newtopictool-createpage' )
) ||
// When the new topic tool will be opened (usually when clicking the 'Add topic' tab)
static::shouldOpenNewTopicTool( $context ) ||
// In read mode (accessible for non-existent pages by clicking 'Cancel' in editor)
$req->getRawVal( 'action', 'view' ) === 'view'
) &&
// Only in talk namespaces, not including other namespaces that isAvailableForTitle() allows
$title->isTalkPage() &&
// Only if the subject page or the user exists (T288319, T312560)
static::pageSubjectExists( $title ) &&
// The default display will probably be more useful for links to old revisions of deleted
// pages (existing pages are already excluded in shouldShowNewSectionTab())
$req->getIntOrNull( 'oldid' ) === null &&
// Only if "New section" tab would be shown by the skin.
// If the page doesn't exist, this only happens in talk namespaces.
// If the page exists, it also considers magic words on the page.
static::shouldShowNewSectionTab( $context ) &&
// User has new topic tool enabled (and not using &dtenable=0)
static::isFeatureEnabledForOutput( $out, static::NEWTOPICTOOL )
);
}
/**
* Return whether the corresponding subject page exists, or (if the page is a user talk page,
* excluding subpages) whether the user is registered or a valid IP address.
*
* @param LinkTarget $talkPage
* @return bool
*/
private static function pageSubjectExists( LinkTarget $talkPage ): bool {
$services = MediaWikiServices::getInstance();
$namespaceInfo = $services->getNamespaceInfo();
Assert::precondition( $namespaceInfo->isTalk( $talkPage->getNamespace() ), "Page is a talk page" );
if ( $talkPage->getNamespace() === NS_USER_TALK && strpos( $talkPage->getText(), '/' ) === false ) {
if ( $services->getUserNameUtils()->isIP( $talkPage->getText() ) ) {
return true;
}
$subjectUser = $services->getUserFactory()->newFromName( $talkPage->getText() );
if ( $subjectUser && $subjectUser->isRegistered() ) {
return true;
}
return false;
} else {
$subjectPage = $namespaceInfo->getSubjectPage( $talkPage );
return $services->getPageStore()->getPageForLink( $subjectPage )->exists();
}
}
/**
* Check if we should be adding automatic topic subscriptions for this user on this page.
*
* @param UserIdentity $user
* @param Title $title
* @return bool
*/
public static function shouldAddAutoSubscription( UserIdentity $user, Title $title ): bool {
// This duplicates the logic from isFeatureEnabledForOutput(),
// because we don't have access to the request or the output here.
// Topic subscription is not available on your own talk page, as you will
// get 'edit-user-talk' notifications already. (T276996)
// (can't use User::getTalkPage() to check because this is a UserIdentity)
if ( $title->inNamespace( NS_USER_TALK ) && $title->getText() === $user->getName() ) {
return false;
}
// Users flagged as bots shouldn't be autosubscribed. They can
// manually subscribe if it becomes relevant. (T301933)
$user = MediaWikiServices::getInstance()
->getUserFactory()
->newFromUserIdentity( $user );
if ( $user->isBot() ) {
return false;
}
// Check if the user has automatic subscriptions enabled, and the tools are enabled on the page.
return static::isAvailableForTitle( $title ) &&
static::isFeatureEnabledForUser( $user, static::AUTOTOPICSUB );
}
}