SpecialRecentChanges.php

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<?php
use MediaWiki\MediaWikiServices;
use Wikimedia\Rdbms\IResultWrapper;
use Wikimedia\Rdbms\FakeResultWrapper;

class SpecialRecentChanges extends ChangesListSpecialPage {

    protected static $savedQueriesPreferenceName = 'rcfilters-saved-queries';
    protected static $daysPreferenceName = 'rcdays'; // Use general RecentChanges preference
    protected static $limitPreferenceName = 'rcfilters-limit'; // Use RCFilters-specific preference
    protected static $collapsedPreferenceName = 'rcfilters-rc-collapsed';

    private $watchlistFilterGroupDefinition;

    public function __construct( $name = 'Recentchanges', $restriction = '' ) {
        parent::__construct( $name, $restriction );

        $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' => function ( $ctx, $rc ) {
                        return $rc->getAttribute( 'wl_user' );
                    }
                ],
                [
                    'name' => 'watchednew',
                    'label' => 'rcfilters-filter-watchlist-watchednew-label',
                    'description' => 'rcfilters-filter-watchlist-watchednew-description',
                    'cssClassSuffix' => 'watchednew',
                    'isRowApplicableCallable' => function ( $ctx, $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' => function ( $ctx, $rc ) {
                        return $rc->getAttribute( 'wl_user' ) === null;
                    },
                ]
            ],
            'default' => ChangesListStringOptionsFilterGroup::NONE,
            'queryCallable' => function ( $specialPageClassName, $context, $dbr,
                &$tables, &$fields, &$conds, &$query_options, &$join_conds, $selectedValues ) {
                sort( $selectedValues );
                $notwatchedCond = 'wl_user IS NULL';
                $watchedCond = 'wl_user IS NOT NULL';
                $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;
    }

    protected function registerFilters() {
        parent::registerFilters();

        if (
            !$this->including() &&
            $this->getUser()->isLoggedIn() &&
            $this->getUser()->isAllowed( 'viewmywatchlist' )
        ) {
            $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' );
        $hideMinor->setDefault( $user->getBoolOption( 'hideminor' ) );

        $automated = $this->getFilterGroup( 'automated' );
        $hideBots = $automated->getFilter( 'hidebots' );
        $hideBots->setDefault( true );

        $reviewStatus = $this->getFilterGroup( 'reviewStatus' );
        if ( $reviewStatus !== null ) {
            // Conditional on feature being available and rights
            if ( $user->getBoolOption( 'hidepatrolled' ) ) {
                $reviewStatus->setDefault( 'unpatrolled' );
                $legacyReviewStatus = $this->getFilterGroup( 'legacyReviewStatus' );
                $legacyHidePatrolled = $legacyReviewStatus->getFilter( 'hidepatrolled' );
                $legacyHidePatrolled->setDefault( true );
            }
        }

        $changeType = $this->getFilterGroup( 'changeType' );
        $hideCategorization = $changeType->getFilter( 'hidecategorization' );
        if ( $hideCategorization !== null ) {
            // Conditional on feature being available
            $hideCategorization->setDefault( $user->getBoolOption( '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 doMainQuery( $tables, $fields, $conds, $query_options,
        $join_conds, FormOptions $opts
    ) {
        $dbr = $this->getDB();
        $user = $this->getUser();

        $rcQuery = RecentChange::getQueryInfo();
        $tables = array_merge( $tables, $rcQuery['tables'] );
        $fields = array_merge( $rcQuery['fields'], $fields );
        $join_conds = array_merge( $join_conds, $rcQuery['joins'] );

        // JOIN on watchlist for users
        if ( $user->isLoggedIn() && $user->isAllowed( 'viewmywatchlist' ) ) {
            $tables[] = 'watchlist';
            $fields[] = 'wl_user';
            $fields[] = 'wl_notificationtimestamp';
            $join_conds['watchlist'] = [ 'LEFT JOIN', [
                'wl_user' => $user->getId(),
                'wl_title=rc_title',
                'wl_namespace=rc_namespace'
            ] ];
        }

        // 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']
        ];
        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';
        }
        // 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 );
        $rows = $dbr->select(
            $tables,
            $fields,
            // 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 ] ],
            __METHOD__,
            $query_options,
            $join_conds
        );

        return $rows;
    }

    protected function getDB() {
        return wfGetDB( DB_REPLICA, 'recentchanges' );
    }

    public function outputFeedLinks() {
        $this->addFeedLinks( $this->getFeedQuery() );
    }

    protected function getFeedQuery() {
        $query = array_filter( $this->getOptions()->getAllValues(), 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->getUser()->getOption( 'shownumberswatching' );
        $watcherCache = [];

        $counter = 1;
        $list = ChangesList::newFromContext( $this->getContext(), $this->filterGroups );
        $list->initChangesListRows( $rows );

        $userShowHiddenCats = $this->getUser()->getBoolOption( '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][$obj->rc_title] =
                        MediaWikiServices::getInstance()->getWatchedItemStore()->countWatchers(
                            new TitleValue( (int)$obj->rc_namespace, $obj->rc_title )
                        );
                }
                $rc->numberofWatchingusers = $watcherCache[$obj->rc_namespace][$obj->rc_title];
            }

            $changeLine = $list->recentChangesLine( $rc, !empty( $obj->wl_user ), $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 );
    }

    function setTopText( FormOptions $opts ) {
        $message = $this->msg( 'recentchangestext' )->inContentLanguage();
        if ( !$message->isDisabled() ) {
            $contLang = MediaWikiServices::getInstance()->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 = MessageCache::singleton()->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 )
            );
        }
    }

    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 ( $this->getName() === 'Recentchanges' ) {
            Hooks::run( 'SpecialRecentChangesPanel', [ &$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" ];
    }

    function filterByCategories( &$rows, FormOptions $opts ) {
        wfDeprecated( __METHOD__, '1.31' );

        $categories = array_map( 'trim', explode( '|', $opts['categories'] ) );

        if ( $categories === [] ) {
            return;
        }

        # Filter categories
        $cats = [];
        foreach ( $categories as $cat ) {
            $cat = trim( $cat );
            if ( $cat == '' ) {
                continue;
            }
            $cats[] = $cat;
        }

        # Filter articles
        $articles = [];
        $a2r = [];
        $rowsarr = [];
        foreach ( $rows as $k => $r ) {
            $nt = Title::makeTitle( $r->rc_namespace, $r->rc_title );
            $id = $nt->getArticleID();
            if ( $id == 0 ) {
                continue; # Page might have been deleted...
            }
            if ( !in_array( $id, $articles ) ) {
                $articles[] = $id;
            }
            if ( !isset( $a2r[$id] ) ) {
                $a2r[$id] = [];
            }
            $a2r[$id][] = $k;
            $rowsarr[$k] = $r;
        }

        # Shortcut?
        if ( $articles === [] || $cats === [] ) {
            return;
        }

        # Look up
        $catFind = new CategoryFinder;
        $catFind->seed( $articles, $cats, $opts['categories_any'] ? 'OR' : 'AND' );
        $match = $catFind->run();

        # Filter
        $newrows = [];
        foreach ( $match as $id ) {
            foreach ( $a2r[$id] as $rev ) {
                $k = $rev;
                $newrows[$k] = $rowsarr[$k];
            }
        }
        $rows = new FakeResultWrapper( array_values( $newrows ) );
    }

    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 );
    }

    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' ),
                [ '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 = $config->get( 'RCLinkDays' );
        $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( $this ) ) {
                $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 )->parse(),
                [ '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->getUser()->getIntOption( 'rclimit' );
        // Prefer the RCFilters-specific preference if RCFilters is enabled
        if ( $this->isStructuredFilterUiEnabled() ) {
            return $this->getUser()->getIntOption( static::$limitPreferenceName, $systemPrefValue );
        }

        // Otherwise, use the system rclimit preference value
        return $systemPrefValue;
    }
}