SpecialRecentChanges.php

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<?php
use MediaWiki\MediaWikiServices;
use MediaWiki\User\UserOptionsLookup;
use Wikimedia\Rdbms\IDatabase;
use Wikimedia\Rdbms\ILoadBalancer;
use Wikimedia\Rdbms\IResultWrapper;
 
class SpecialRecentChanges extends ChangesListSpecialPage {
 
    private $watchlistFilterGroupDefinition;
 
    private $watchedItemStore;
 
    private $messageCache;
 
    private $loadBalancer;
 
    private $userOptionsLookup;
 
    private $db;
 
    public $denseRcSizeThreshold = 10000;
 
    public function __construct(
        WatchedItemStoreInterface $watchedItemStore = null,
        MessageCache $messageCache = null,
        ILoadBalancer $loadBalancer = null,
        UserOptionsLookup $userOptionsLookup = null
    ) {
        parent::__construct( 'Recentchanges', '' );
        // This class is extended and therefor fallback to global state - T265310
        $services = MediaWikiServices::getInstance();
        $this->watchedItemStore = $watchedItemStore ?? $services->getWatchedItemStore();
        $this->messageCache = $messageCache ?? $services->getMessageCache();
        $this->loadBalancer = $loadBalancer ?? $services->getDBLoadBalancer();
        $this->userOptionsLookup = $userOptionsLookup ?? $services->getUserOptionsLookup();
 
        $this->watchlistFilterGroupDefinition = [
            'name' => 'watchlist',
            'title' => 'rcfilters-filtergroup-watchlist',
            'class' => ChangesListStringOptionsFilterGroup::class,
            'priority' => -9,
            'isFullCoverage' => true,
            'filters' => [
                [
                    'name' => 'watched',
                    'label' => 'rcfilters-filter-watchlist-watched-label',
                    'description' => 'rcfilters-filter-watchlist-watched-description',
                    'cssClassSuffix' => 'watched',
                    'isRowApplicableCallable' => static function ( IContextSource $ctx, RecentChange $rc ) {
                        return $rc->getAttribute( 'wl_user' );
                    }
                ],
                [
                    'name' => 'watchednew',
                    'label' => 'rcfilters-filter-watchlist-watchednew-label',
                    'description' => 'rcfilters-filter-watchlist-watchednew-description',
                    'cssClassSuffix' => 'watchednew',
                    'isRowApplicableCallable' => static function ( IContextSource $ctx, RecentChange $rc ) {
                        return $rc->getAttribute( 'wl_user' ) &&
                            $rc->getAttribute( 'rc_timestamp' ) &&
                            $rc->getAttribute( 'wl_notificationtimestamp' ) &&
                            $rc->getAttribute( 'rc_timestamp' ) >= $rc->getAttribute( 'wl_notificationtimestamp' );
                    },
                ],
                [
                    'name' => 'notwatched',
                    'label' => 'rcfilters-filter-watchlist-notwatched-label',
                    'description' => 'rcfilters-filter-watchlist-notwatched-description',
                    'cssClassSuffix' => 'notwatched',
                    'isRowApplicableCallable' => static function ( IContextSource $ctx, RecentChange $rc ) {
                        return $rc->getAttribute( 'wl_user' ) === null;
                    },
                ]
            ],
            'default' => ChangesListStringOptionsFilterGroup::NONE,
            'queryCallable' => function ( string $specialClassName, IContextSource $ctx,
                IDatabase $dbr, &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedValues
            ) {
                sort( $selectedValues );
                $notwatchedCond = 'wl_user IS NULL';
                $watchedCond = 'wl_user IS NOT NULL';
                if ( $this->getConfig()->get( 'WatchlistExpiry' ) ) {
                    // Expired watchlist items stay in the DB after their expiry time until they're purged,
                    // so it's not enough to only check for wl_user.
                    $quotedNow = $dbr->addQuotes( $dbr->timestamp() );
                    $notwatchedCond = "wl_user IS NULL OR ( we_expiry IS NOT NULL AND we_expiry < $quotedNow )";
                    $watchedCond = "wl_user IS NOT NULL AND ( we_expiry IS NULL OR we_expiry >= $quotedNow )";
                }
                $newCond = 'rc_timestamp >= wl_notificationtimestamp';
 
                if ( $selectedValues === [ 'notwatched' ] ) {
                    $conds[] = $notwatchedCond;
                    return;
                }
 
                if ( $selectedValues === [ 'watched' ] ) {
                    $conds[] = $watchedCond;
                    return;
                }
 
                if ( $selectedValues === [ 'watchednew' ] ) {
                    $conds[] = $dbr->makeList( [
                        $watchedCond,
                        $newCond
                    ], LIST_AND );
                    return;
                }
 
                if ( $selectedValues === [ 'notwatched', 'watched' ] ) {
                    // no filters
                    return;
                }
 
                if ( $selectedValues === [ 'notwatched', 'watchednew' ] ) {
                    $conds[] = $dbr->makeList( [
                        $notwatchedCond,
                        $dbr->makeList( [
                            $watchedCond,
                            $newCond
                        ], LIST_AND )
                    ], LIST_OR );
                    return;
                }
 
                if ( $selectedValues === [ 'watched', 'watchednew' ] ) {
                    $conds[] = $watchedCond;
                    return;
                }
 
                if ( $selectedValues === [ 'notwatched', 'watched', 'watchednew' ] ) {
                    // no filters
                    return;
                }
            }
        ];
    }
 
    public function execute( $subpage ) {
        // Backwards-compatibility: redirect to new feed URLs
        $feedFormat = $this->getRequest()->getVal( 'feed' );
        if ( !$this->including() && $feedFormat ) {
            $query = $this->getFeedQuery();
            $query['feedformat'] = $feedFormat === 'atom' ? 'atom' : 'rss';
            $this->getOutput()->redirect( wfAppendQuery( wfScript( 'api' ), $query ) );
 
            return;
        }
 
        // 10 seconds server-side caching max
        $out = $this->getOutput();
        $out->setCdnMaxage( 10 );
        // Check if the client has a cached version
        $lastmod = $this->checkLastModified();
        if ( $lastmod === false ) {
            return;
        }
 
        $this->addHelpLink(
            'https://meta.wikimedia.org/wiki/Special:MyLanguage/Help:Recent_changes',
            true
        );
        parent::execute( $subpage );
    }
 
    protected function transformFilterDefinition( array $filterDefinition ) {
        if ( isset( $filterDefinition['showHideSuffix'] ) ) {
            $filterDefinition['showHide'] = 'rc' . $filterDefinition['showHideSuffix'];
        }
 
        return $filterDefinition;
    }
 
    private function needsWatchlistFeatures(): bool {
        return !$this->including()
            && $this->getUser()->isRegistered()
            && $this->getAuthority()->isAllowed( 'viewmywatchlist' );
    }
 
    protected function registerFilters() {
        parent::registerFilters();
 
        if ( $this->needsWatchlistFeatures() ) {
            $this->registerFiltersFromDefinitions( [ $this->watchlistFilterGroupDefinition ] );
            $watchlistGroup = $this->getFilterGroup( 'watchlist' );
            $watchlistGroup->getFilter( 'watched' )->setAsSupersetOf(
                $watchlistGroup->getFilter( 'watchednew' )
            );
        }
 
        $user = $this->getUser();
 
        $significance = $this->getFilterGroup( 'significance' );
        $hideMinor = $significance->getFilter( 'hideminor' );
        '@phan-var ChangesListBooleanFilter $hideMinor';
        $hideMinor->setDefault( $this->userOptionsLookup->getBoolOption( $user, 'hideminor' ) );
 
        $automated = $this->getFilterGroup( 'automated' );
        $hideBots = $automated->getFilter( 'hidebots' );
        '@phan-var ChangesListBooleanFilter $hideBots';
        $hideBots->setDefault( true );
 
        $reviewStatus = $this->getFilterGroup( 'reviewStatus' );
        '@phan-var ChangesListStringOptionsFilterGroup|null $reviewStatus';
        if ( $reviewStatus !== null ) {
            // Conditional on feature being available and rights
            if ( $this->userOptionsLookup->getBoolOption( $user, 'hidepatrolled' ) ) {
                $reviewStatus->setDefault( 'unpatrolled' );
                $legacyReviewStatus = $this->getFilterGroup( 'legacyReviewStatus' );
                $legacyHidePatrolled = $legacyReviewStatus->getFilter( 'hidepatrolled' );
                '@phan-var ChangesListBooleanFilter $legacyHidePatrolled';
                $legacyHidePatrolled->setDefault( true );
            }
        }
 
        $changeType = $this->getFilterGroup( 'changeType' );
        $hideCategorization = $changeType->getFilter( 'hidecategorization' );
        '@phan-var ChangesListBooleanFilter $hideCategorization';
        if ( $hideCategorization !== null ) {
            // Conditional on feature being available
            $hideCategorization->setDefault( $this->userOptionsLookup->getBoolOption( $user, 'hidecategorization' ) );
        }
    }
 
    public function parseParameters( $par, FormOptions $opts ) {
        parent::parseParameters( $par, $opts );
 
        $bits = preg_split( '/\s*,\s*/', trim( $par ) );
        foreach ( $bits as $bit ) {
            if ( is_numeric( $bit ) ) {
                $opts['limit'] = $bit;
            }
 
            $m = [];
            if ( preg_match( '/^limit=(\d+)$/', $bit, $m ) ) {
                $opts['limit'] = $m[1];
            }
            if ( preg_match( '/^days=(\d+(?:\.\d+)?)$/', $bit, $m ) ) {
                $opts['days'] = $m[1];
            }
            if ( preg_match( '/^namespace=(.*)$/', $bit, $m ) ) {
                $opts['namespace'] = $m[1];
            }
            if ( preg_match( '/^tagfilter=(.*)$/', $bit, $m ) ) {
                $opts['tagfilter'] = $m[1];
            }
        }
    }
 
    protected function addWatchlistJoins( IDatabase $dbr, &$tables, &$fields, &$joinConds, &$conds ) {
        if ( !$this->needsWatchlistFeatures() ) {
            return;
        }
 
        // Join on watchlist table.
        $tables[] = 'watchlist';
        $fields[] = 'wl_user';
        $fields[] = 'wl_notificationtimestamp';
        $joinConds['watchlist'] = [ 'LEFT JOIN', [
            'wl_user' => $this->getUser()->getId(),
            'wl_title=rc_title',
            'wl_namespace=rc_namespace'
        ] ];
 
        // Exclude expired watchlist items.
        if ( $this->getConfig()->get( 'WatchlistExpiry' ) ) {
            $tables[] = 'watchlist_expiry';
            $fields[] = 'we_expiry';
            $joinConds['watchlist_expiry'] = [ 'LEFT JOIN', 'wl_id = we_item' ];
        }
    }
 
    protected function doMainQuery( $tables, $fields, $conds, $query_options,
        $join_conds, FormOptions $opts
    ) {
        $dbr = $this->getDB();
 
        $rcQuery = RecentChange::getQueryInfo();
        $tables = array_merge( $rcQuery['tables'], $tables );
        $fields = array_merge( $rcQuery['fields'], $fields );
        $join_conds = array_merge( $rcQuery['joins'], $join_conds );
 
        // Join with watchlist and watchlist_expiry tables to highlight watched rows.
        $this->addWatchlistJoins( $dbr, $tables, $fields, $join_conds, $conds );
 
        // JOIN on page, used for 'last revision' filter highlight
        $tables[] = 'page';
        $fields[] = 'page_latest';
        $join_conds['page'] = [ 'LEFT JOIN', 'rc_cur_id=page_id' ];
 
        $tagFilter = $opts['tagfilter'] ? explode( '|', $opts['tagfilter'] ) : [];
        ChangeTags::modifyDisplayQuery(
            $tables,
            $fields,
            $conds,
            $join_conds,
            $query_options,
            $tagFilter
        );
 
        if ( !$this->runMainQueryHook( $tables, $fields, $conds, $query_options, $join_conds,
            $opts )
        ) {
            return false;
        }
 
        if ( $this->areFiltersInConflict() ) {
            return false;
        }
 
        $orderByAndLimit = [
            'ORDER BY' => 'rc_timestamp DESC',
            'LIMIT' => $opts['limit']
        ];
 
        // Workaround for T298225: MySQL's lack of awareness of LIMIT when
        // choosing the join order.
        $ctTableName = ChangeTags::getDisplayTableName();
        if ( isset( $join_conds[$ctTableName] )
            && $this->isDenseTagFilter( $conds['ct_tag_id'] ?? [], $opts['limit'] )
        ) {
            $join_conds[$ctTableName][0] = 'STRAIGHT_JOIN';
        }
 
        if ( in_array( 'DISTINCT', $query_options ) ) {
            // ChangeTags::modifyDisplayQuery() adds DISTINCT when filtering on multiple tags.
            // In order to prevent DISTINCT from causing query performance problems,
            // we have to GROUP BY the primary key. This in turn requires us to add
            // the primary key to the end of the ORDER BY, and the old ORDER BY to the
            // start of the GROUP BY
            $orderByAndLimit['ORDER BY'] = 'rc_timestamp DESC, rc_id DESC';
            $orderByAndLimit['GROUP BY'] = 'rc_timestamp, rc_id';
        }
 
        // rc_new is not an ENUM, but adding a redundant rc_new IN (0,1) gives mysql enough
        // knowledge to use an index merge if it wants (it may use some other index though).
        $conds += [ 'rc_new' => [ 0, 1 ] ];
 
        // array_merge() is used intentionally here so that hooks can, should
        // they so desire, override the ORDER BY / LIMIT condition(s); prior to
        // MediaWiki 1.26 this used to use the plus operator instead, which meant
        // that extensions weren't able to change these conditions
        $query_options = array_merge( $orderByAndLimit, $query_options );
        $query_options['MAX_EXECUTION_TIME'] = $this->getConfig()->get( 'MaxExecutionTimeForExpensiveQueries' );
        $rows = $dbr->select(
            $tables,
            $fields,
            $conds,
            __METHOD__,
            $query_options,
            $join_conds
        );
 
        return $rows;
    }
 
    protected function isDenseTagFilter( $tagIds, $limit ) {
        global $wgMiserMode;
 
        $dbr = $this->getDB();
        if ( !$tagIds
            // This is a MySQL-specific hack
            || $dbr->getType() !== 'mysql'
            // Unnecessary for small wikis
            || !$wgMiserMode
        ) {
            return false;
        }
 
        $rcInfo = $dbr->newSelectQueryBuilder()
            ->select( [
                'min_id' => 'MIN(rc_id)',
                'max_id' => 'MAX(rc_id)',
            ] )
            ->from( 'recentchanges' )
            ->caller( __METHOD__ )
            ->fetchRow();
        if ( !$rcInfo ) {
            return false;
        }
        $rcSize = $rcInfo->max_id - $rcInfo->min_id;
        if ( $rcSize < $this->denseRcSizeThreshold ) {
            // RC is too small to worry about
            return false;
        }
        $tagCount = $dbr->newSelectQueryBuilder()
            ->table( 'change_tag' )
            ->where( [
                'ct_rc_id >= ' . $dbr->addQuotes( $rcInfo->min_id ),
                'ct_tag_id' => $tagIds
            ] )
            ->caller( __METHOD__ )
            ->estimateRowCount();
 
        // If we scan recentchanges first, the number of rows examined will be
        // approximately the limit divided by the proportion of tagged rows,
        // i.e. $limit / ( $tagCount / $rcSize ). If that's less than $tagCount,
        // use a straight join. The inequality below is rearranged for
        // simplicity and to avoid division by zero.
        $isDense = $limit * $rcSize < $tagCount * $tagCount;
 
        wfDebug( __METHOD__ . ": rcSize = $rcSize, tagCount = $tagCount, limit = $limit => " .
            ( $isDense ? 'dense' : 'sparse' ) );
        return $isDense;
    }
 
    protected function getDB() {
        if ( !$this->db ) {
            $this->db = $this->loadBalancer->getConnectionRef(
                ILoadBalancer::DB_REPLICA, 'recentchanges' );
        }
        return $this->db;
    }
 
    public function outputFeedLinks() {
        $this->addFeedLinks( $this->getFeedQuery() );
    }
 
    protected function getFeedQuery() {
        $query = array_filter( $this->getOptions()->getAllValues(), static function ( $value ) {
            // API handles empty parameters in a different way
            return $value !== '';
        } );
        $query['action'] = 'feedrecentchanges';
        $feedLimit = $this->getConfig()->get( 'FeedLimit' );
        if ( $query['limit'] > $feedLimit ) {
            $query['limit'] = $feedLimit;
        }
 
        return $query;
    }
 
    public function outputChangesList( $rows, $opts ) {
        $limit = $opts['limit'];
 
        $showWatcherCount = $this->getConfig()->get( 'RCShowWatchingUsers' )
            && $this->userOptionsLookup->getBoolOption( $this->getUser(), 'shownumberswatching' );
        $watcherCache = [];
 
        $counter = 1;
        $list = ChangesList::newFromContext( $this->getContext(), $this->filterGroups );
        $list->initChangesListRows( $rows );
 
        $userShowHiddenCats = $this->userOptionsLookup->getBoolOption( $this->getUser(), 'showhiddencats' );
        $rclistOutput = $list->beginRecentChangesList();
        if ( $this->isStructuredFilterUiEnabled() ) {
            $rclistOutput .= $this->makeLegend();
        }
 
        foreach ( $rows as $obj ) {
            if ( $limit == 0 ) {
                break;
            }
            $rc = RecentChange::newFromRow( $obj );
 
            # Skip CatWatch entries for hidden cats based on user preference
            if (
                $rc->getAttribute( 'rc_type' ) == RC_CATEGORIZE &&
                !$userShowHiddenCats &&
                $rc->getParam( 'hidden-cat' )
            ) {
                continue;
            }
 
            $rc->counter = $counter++;
            # Check if the page has been updated since the last visit
            if ( $this->getConfig()->get( 'ShowUpdatedMarker' )
                && !empty( $obj->wl_notificationtimestamp )
            ) {
                $rc->notificationtimestamp = ( $obj->rc_timestamp >= $obj->wl_notificationtimestamp );
            } else {
                $rc->notificationtimestamp = false; // Default
            }
            # Check the number of users watching the page
            $rc->numberofWatchingusers = 0; // Default
            if ( $showWatcherCount && $obj->rc_namespace >= 0 ) {
                if ( !isset( $watcherCache[$obj->rc_namespace][$obj->rc_title] ) ) {
                    $watcherCache[$obj->rc_namespace][$obj->rc_title] =
                        $this->watchedItemStore->countWatchers(
                            new TitleValue( (int)$obj->rc_namespace, $obj->rc_title )
                        );
                }
                $rc->numberofWatchingusers = $watcherCache[$obj->rc_namespace][$obj->rc_title];
            }
 
            $watched = !empty( $obj->wl_user );
            if ( $watched && $this->getConfig()->get( 'WatchlistExpiry' ) ) {
                $notExpired = $obj->we_expiry === null
                    || MWTimestamp::convert( TS_UNIX, $obj->we_expiry ) > wfTimestamp();
                $watched = $watched && $notExpired;
            }
            $changeLine = $list->recentChangesLine( $rc, $watched, $counter );
            if ( $changeLine !== false ) {
                $rclistOutput .= $changeLine;
                --$limit;
            }
        }
        $rclistOutput .= $list->endRecentChangesList();
 
        if ( $rows->numRows() === 0 ) {
            $this->outputNoResults();
            if ( !$this->including() ) {
                $this->getOutput()->setStatusCode( 404 );
            }
        } else {
            $this->getOutput()->addHTML( $rclistOutput );
        }
    }
 
    public function doHeader( $opts, $numRows ) {
        $this->setTopText( $opts );
 
        $defaults = $opts->getAllValues();
        $nondefaults = $opts->getChangedValues();
 
        $panel = [];
        if ( !$this->isStructuredFilterUiEnabled() ) {
            $panel[] = $this->makeLegend();
        }
        $panel[] = $this->optionsPanel( $defaults, $nondefaults, $numRows );
        $panel[] = '<hr />';
 
        $extraOpts = $this->getExtraOptions( $opts );
        $extraOptsCount = count( $extraOpts );
        $count = 0;
        $submit = ' ' . Xml::submitButton( $this->msg( 'recentchanges-submit' )->text() );
 
        $out = Xml::openElement( 'table', [ 'class' => 'mw-recentchanges-table' ] );
        foreach ( $extraOpts as $name => $optionRow ) {
            # Add submit button to the last row only
            ++$count;
            $addSubmit = ( $count === $extraOptsCount ) ? $submit : '';
 
            $out .= Xml::openElement( 'tr', [ 'class' => $name . 'Form' ] );
            if ( is_array( $optionRow ) ) {
                $out .= Xml::tags(
                    'td',
                    [ 'class' => 'mw-label mw-' . $name . '-label' ],
                    $optionRow[0]
                );
                $out .= Xml::tags(
                    'td',
                    [ 'class' => 'mw-input' ],
                    $optionRow[1] . $addSubmit
                );
            } else {
                $out .= Xml::tags(
                    'td',
                    [ 'class' => 'mw-input', 'colspan' => 2 ],
                    $optionRow . $addSubmit
                );
            }
            $out .= Xml::closeElement( 'tr' );
        }
        $out .= Xml::closeElement( 'table' );
 
        $unconsumed = $opts->getUnconsumedValues();
        foreach ( $unconsumed as $key => $value ) {
            $out .= Html::hidden( $key, $value );
        }
 
        $t = $this->getPageTitle();
        $out .= Html::hidden( 'title', $t->getPrefixedText() );
        $form = Xml::tags( 'form', [ 'action' => wfScript() ], $out );
        $panel[] = $form;
        $panelString = implode( "\n", $panel );
 
        $rcoptions = Xml::fieldset(
            $this->msg( 'recentchanges-legend' )->text(),
            $panelString,
            [ 'class' => 'rcoptions cloptions' ]
        );
 
        // Insert a placeholder for RCFilters
        if ( $this->isStructuredFilterUiEnabled() ) {
            $rcfilterContainer = Html::element(
                'div',
                // TODO: Remove deprecated rcfilters-container class
                [ 'class' => 'rcfilters-container mw-rcfilters-container' ]
            );
 
            $loadingContainer = Html::rawElement(
                'div',
                [ 'class' => 'mw-rcfilters-spinner' ],
                Html::element(
                    'div',
                    [ 'class' => 'mw-rcfilters-spinner-bounce' ]
                )
            );
 
            // Wrap both with rcfilters-head
            $this->getOutput()->addHTML(
                Html::rawElement(
                    'div',
                    // TODO: Remove deprecated rcfilters-head class
                    [ 'class' => 'rcfilters-head mw-rcfilters-head' ],
                    $rcfilterContainer . $rcoptions
                )
            );
 
            // Add spinner
            $this->getOutput()->addHTML( $loadingContainer );
        } else {
            $this->getOutput()->addHTML( $rcoptions );
        }
 
        $this->setBottomText( $opts );
    }
 
    public function setTopText( FormOptions $opts ) {
        $message = $this->msg( 'recentchangestext' )->inContentLanguage();
        if ( !$message->isDisabled() ) {
            $contLang = $this->getContentLanguage();
            // Parse the message in this weird ugly way to preserve the ability to include interlanguage
            // links in it (T172461). In the future when T66969 is resolved, perhaps we can just use
            // $message->parse() instead. This code is copied from Message::parseText().
            $parserOutput = $this->messageCache->parse(
                $message->plain(),
                $this->getPageTitle(),
                /*linestart*/true,
                // Message class sets the interface flag to false when parsing in a language different than
                // user language, and this is wiki content language
                /*interface*/false,
                $contLang
            );
            $content = $parserOutput->getText( [
                'enableSectionEditLinks' => false,
            ] );
            // Add only metadata here (including the language links), text is added below
            $this->getOutput()->addParserOutputMetadata( $parserOutput );
 
            $langAttributes = [
                'lang' => $contLang->getHtmlCode(),
                'dir' => $contLang->getDir(),
            ];
 
            $topLinksAttributes = [ 'class' => 'mw-recentchanges-toplinks' ];
 
            if ( $this->isStructuredFilterUiEnabled() ) {
                // Check whether the widget is already collapsed or expanded
                $collapsedState = $this->getRequest()->getCookie( 'rcfilters-toplinks-collapsed-state' );
                // Note that an empty/unset cookie means collapsed, so check for !== 'expanded'
                $topLinksAttributes[ 'class' ] .= $collapsedState !== 'expanded' ?
                    ' mw-recentchanges-toplinks-collapsed' : '';
 
                $this->getOutput()->enableOOUI();
                $contentTitle = new OOUI\ButtonWidget( [
                    'classes' => [ 'mw-recentchanges-toplinks-title' ],
                    'label' => new OOUI\HtmlSnippet( $this->msg( 'rcfilters-other-review-tools' )->parse() ),
                    'framed' => false,
                    'indicator' => $collapsedState !== 'expanded' ? 'down' : 'up',
                    'flags' => [ 'progressive' ],
                ] );
 
                $contentWrapper = Html::rawElement( 'div',
                    array_merge(
                        [ 'class' => 'mw-recentchanges-toplinks-content mw-collapsible-content' ],
                        $langAttributes
                    ),
                    $content
                );
                $content = $contentTitle . $contentWrapper;
            } else {
                // Language direction should be on the top div only
                // if the title is not there. If it is there, it's
                // interface direction, and the language/dir attributes
                // should be on the content itself
                $topLinksAttributes = array_merge( $topLinksAttributes, $langAttributes );
            }
 
            $this->getOutput()->addHTML(
                Html::rawElement( 'div', $topLinksAttributes, $content )
            );
        }
    }
 
    public function getExtraOptions( $opts ) {
        $opts->consumeValues( [
            'namespace', 'invert', 'associated', 'tagfilter'
        ] );
 
        $extraOpts = [];
        $extraOpts['namespace'] = $this->namespaceFilterForm( $opts );
 
        $tagFilter = ChangeTags::buildTagFilterSelector(
            $opts['tagfilter'], false, $this->getContext() );
        if ( count( $tagFilter ) ) {
            $extraOpts['tagfilter'] = $tagFilter;
        }
 
        // Don't fire the hook for subclasses. (Or should we?)
        if ( $this->getName() === 'Recentchanges' ) {
            $this->getHookRunner()->onSpecialRecentChangesPanel( $extraOpts, $opts );
        }
 
        return $extraOpts;
    }
 
    protected function addModules() {
        parent::addModules();
        $out = $this->getOutput();
        $out->addModules( 'mediawiki.special.recentchanges' );
    }
 
    public function checkLastModified() {
        $dbr = $this->getDB();
        $lastmod = $dbr->selectField( 'recentchanges', 'MAX(rc_timestamp)', '', __METHOD__ );
 
        return $lastmod;
    }
 
    protected function namespaceFilterForm( FormOptions $opts ) {
        $nsSelect = Html::namespaceSelector(
            [ 'selected' => $opts['namespace'], 'all' => '', 'in-user-lang' => true ],
            [ 'name' => 'namespace', 'id' => 'namespace' ]
        );
        $nsLabel = Xml::label( $this->msg( 'namespace' )->text(), 'namespace' );
        $attribs = [ 'class' => [ 'mw-input-with-label' ] ];
        // Hide the checkboxes when the namespace filter is set to 'all'.
        if ( $opts['namespace'] === '' ) {
            $attribs['class'][] = 'mw-input-hidden';
        }
        $invert = Html::rawElement( 'span', $attribs, Xml::checkLabel(
            $this->msg( 'invert' )->text(), 'invert', 'nsinvert',
            $opts['invert'],
            [ 'title' => $this->msg( 'tooltip-invert' )->text() ]
        ) );
        $associated = Html::rawElement( 'span', $attribs, Xml::checkLabel(
            $this->msg( 'namespace_association' )->text(), 'associated', 'nsassociated',
            $opts['associated'],
            [ 'title' => $this->msg( 'tooltip-namespace_association' )->text() ]
        ) );
 
        return [ $nsLabel, "$nsSelect $invert $associated" ];
    }
 
    private function makeOptionsLink( $title, $override, $options, $active = false ) {
        $params = $this->convertParamsForLink( $override + $options );
 
        if ( $active ) {
            $title = new HtmlArmor( '<strong>' . htmlspecialchars( $title ) . '</strong>' );
        }
 
        return $this->getLinkRenderer()->makeKnownLink( $this->getPageTitle(), $title, [
            'data-params' => json_encode( $override ),
            'data-keys' => implode( ',', array_keys( $override ) ),
        ], $params );
    }
 
    private function optionsPanel( $defaults, $nondefaults, $numRows ) {
        $options = $nondefaults + $defaults;
 
        $note = '';
        $msg = $this->msg( 'rclegend' );
        if ( !$msg->isDisabled() ) {
            $note .= Html::rawElement(
                'div',
                [ 'class' => 'mw-rclegend' ],
                $msg->parse()
            );
        }
 
        $lang = $this->getLanguage();
        $user = $this->getUser();
        $config = $this->getConfig();
        if ( $options['from'] ) {
            $resetLink = $this->makeOptionsLink( $this->msg( 'rclistfromreset' )->text(),
                [ 'from' => '' ], $nondefaults );
 
            $noteFromMsg = $this->msg( 'rcnotefrom' )
                ->numParams( $options['limit'] )
                ->params(
                    $lang->userTimeAndDate( $options['from'], $user ),
                    $lang->userDate( $options['from'], $user ),
                    $lang->userTime( $options['from'], $user )
                )
                ->numParams( $numRows );
            $note .= Html::rawElement(
                    'span',
                    [ 'class' => 'rcnotefrom' ],
                    $noteFromMsg->parse()
                ) .
                ' ' .
                Html::rawElement(
                    'span',
                    [ 'class' => 'rcoptions-listfromreset' ],
                    $this->msg( 'parentheses' )->rawParams( $resetLink )->parse()
                ) .
                '<br />';
        }
 
        # Sort data for display and make sure it's unique after we've added user data.
        $linkLimits = $config->get( 'RCLinkLimits' );
        $linkLimits[] = $options['limit'];
        sort( $linkLimits );
        $linkLimits = array_unique( $linkLimits );
 
        $linkDays = $this->getLinkDays();
        $linkDays[] = $options['days'];
        sort( $linkDays );
        $linkDays = array_unique( $linkDays );
 
        // limit links
        $cl = [];
        foreach ( $linkLimits as $value ) {
            $cl[] = $this->makeOptionsLink( $lang->formatNum( $value ),
                [ 'limit' => $value ], $nondefaults, $value == $options['limit'] );
        }
        $cl = $lang->pipeList( $cl );
 
        // day links, reset 'from' to none
        $dl = [];
        foreach ( $linkDays as $value ) {
            $dl[] = $this->makeOptionsLink( $lang->formatNum( $value ),
                [ 'days' => $value, 'from' => '' ], $nondefaults, $value == $options['days'] );
        }
        $dl = $lang->pipeList( $dl );
 
        $showhide = [ 'show', 'hide' ];
 
        $links = [];
 
        foreach ( $this->getLegacyShowHideFilters() as $key => $filter ) {
            $msg = $filter->getShowHide();
            $linkMessage = $this->msg( $msg . '-' . $showhide[1 - $options[$key]] );
            // Extensions can define additional filters, but don't need to define the corresponding
            // messages. If they don't exist, just fall back to 'show' and 'hide'.
            if ( !$linkMessage->exists() ) {
                $linkMessage = $this->msg( $showhide[1 - $options[$key]] );
            }
 
            $link = $this->makeOptionsLink( $linkMessage->text(),
                [ $key => 1 - $options[$key] ], $nondefaults );
 
            $attribs = [
                'class' => "$msg rcshowhideoption clshowhideoption",
                'data-filter-name' => $filter->getName(),
            ];
 
            if ( $filter->isFeatureAvailableOnStructuredUi() ) {
                $attribs['data-feature-in-structured-ui'] = true;
            }
 
            $links[] = Html::rawElement(
                'span',
                $attribs,
                $this->msg( $msg )->rawParams( $link )->parse()
            );
        }
 
        // show from this onward link
        $timestamp = wfTimestampNow();
        $now = $lang->userTimeAndDate( $timestamp, $user );
        $timenow = $lang->userTime( $timestamp, $user );
        $datenow = $lang->userDate( $timestamp, $user );
        $pipedLinks = '<span class="rcshowhide">' . $lang->pipeList( $links ) . '</span>';
 
        $rclinks = Html::rawElement(
            'span',
            [ 'class' => 'rclinks' ],
            $this->msg( 'rclinks' )->rawParams( $cl, $dl, '' )->parse()
        );
 
        $rclistfrom = Html::rawElement(
            'span',
            [ 'class' => 'rclistfrom' ],
            $this->makeOptionsLink(
                $this->msg( 'rclistfrom' )->plaintextParams( $now, $timenow, $datenow )->text(),
                [ 'from' => $timestamp, 'fromFormatted' => $now ],
                $nondefaults
            )
        );
 
        return "{$note}$rclinks<br />$pipedLinks<br />$rclistfrom";
    }
 
    public function isIncludable() {
        return true;
    }
 
    protected function getCacheTTL() {
        return 60 * 5;
    }
 
    public function getDefaultLimit() {
        $systemPrefValue = $this->userOptionsLookup->getIntOption( $this->getUser(), 'rclimit' );
        // Prefer the RCFilters-specific preference if RCFilters is enabled
        if ( $this->isStructuredFilterUiEnabled() ) {
            return $this->userOptionsLookup->getIntOption(
                $this->getUser(), $this->getLimitPreferenceName(), $systemPrefValue
            );
        }
 
        // Otherwise, use the system rclimit preference value
        return $systemPrefValue;
    }
 
    protected function getLimitPreferenceName(): string {
        return 'rcfilters-limit'; // Use RCFilters-specific preference
    }
 
    protected function getSavedQueriesPreferenceName(): string {
        return 'rcfilters-saved-queries';
    }
 
    protected function getDefaultDaysPreferenceName(): string {
        return 'rcdays'; // Use general RecentChanges preference
    }
 
    protected function getCollapsedPreferenceName(): string {
        return 'rcfilters-rc-collapsed';
    }
 
}