Skin.php

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<?php
use MediaWiki\HookContainer\ProtectedHookAccessorTrait;
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionLookup;
use MediaWiki\Revision\RevisionStore;
use Wikimedia\WrappedString;
use Wikimedia\WrappedStringList;
 
abstract class Skin extends ContextSource {
    use ProtectedHookAccessorTrait;
 
    protected $skinname = null;
 
    protected $options = [];
    protected $mRelevantTitle = null;
    protected $mRelevantUser = null;
 
    public $stylename = null;
 
    protected const VERSION_MAJOR = 1;
 
    public static function getVersion() {
        return self::VERSION_MAJOR;
    }
 
    public static function getSkinNames() {
        wfDeprecated( __METHOD__, '1.36' );
 
        $skinFactory = MediaWikiServices::getInstance()->getSkinFactory();
        return $skinFactory->getSkinNames();
    }
 
    public static function getAllowedSkins() {
        wfDeprecated( __METHOD__, '1.36' );
 
        $skinFactory = MediaWikiServices::getInstance()->getSkinFactory();
        return $skinFactory->getAllowedSkins();
    }
 
    public static function normalizeKey( $key ) {
        global $wgDefaultSkin, $wgFallbackSkin;
 
        $skinFactory = MediaWikiServices::getInstance()->getSkinFactory();
        $skinNames = $skinFactory->getSkinNames();
 
        // Make keys lowercase for case-insensitive matching.
        $skinNames = array_change_key_case( $skinNames, CASE_LOWER );
        $key = strtolower( $key );
        $defaultSkin = strtolower( $wgDefaultSkin );
        $fallbackSkin = strtolower( $wgFallbackSkin );
 
        if ( $key == '' || $key == 'default' ) {
            // Don't return the default immediately;
            // in a misconfiguration we need to fall back.
            $key = $defaultSkin;
        }
 
        if ( isset( $skinNames[$key] ) ) {
            return $key;
        }
 
        // Older versions of the software used a numeric setting
        // in the user preferences.
        $fallback = [
            0 => $defaultSkin,
            2 => 'cologneblue'
        ];
 
        if ( isset( $fallback[$key] ) ) {
            $key = $fallback[$key];
        }
 
        if ( isset( $skinNames[$key] ) ) {
            return $key;
        } elseif ( isset( $skinNames[$defaultSkin] ) ) {
            return $defaultSkin;
        } else {
            return $fallbackSkin;
        }
    }
 
    public function __construct( $options = null ) {
        if ( is_string( $options ) ) {
            $this->skinname = $options;
        } elseif ( $options ) {
            $name = $options['name'] ?? null;
 
            if ( !$name ) {
                throw new SkinException( 'Skin name must be specified' );
            }
 
            $this->options = $options;
            $this->skinname = $name;
        }
    }
 
    public function getSkinName() {
        return $this->skinname;
    }
 
    public function isResponsive() {
        return $this->options['responsive'] ?? false;
    }
 
    public function initPage( OutputPage $out ) {
        $skinMetaTags = $this->getConfig()->get( 'SkinMetaTags' );
        $this->preloadExistence();
 
        if ( $this->isResponsive() ) {
            $out->addMeta(
                'viewport',
                'width=device-width, initial-scale=1.0, ' .
                'user-scalable=yes, minimum-scale=0.25, maximum-scale=5.0'
            );
        }
 
        $tags = [
            'og:title' => $out->getDisplayTitle(),
            'twitter:card' => 'summary_large_image',
            'og:type' => 'website',
        ];
 
        // Support sharing on platforms such as Facebook and Twitter
        foreach ( $tags as $key => $value ) {
            if ( in_array( $key, $skinMetaTags ) ) {
                $out->addMeta( $key, $value );
            }
        }
    }
 
    public function getDefaultModules() {
        $out = $this->getOutput();
        $user = $this->getUser();
 
        // Modules declared in the $modules literal are loaded
        // for ALL users, on ALL pages, in ALL skins.
        // Keep this list as small as possible!
        $modules = [
            // The 'styles' key sets render-blocking style modules
            // Unlike other keys in $modules, this is an associative array
            // where each key is its own group pointing to a list of modules
            'styles' => [
                'skin' => $this->options['styles'] ?? [],
                'core' => [],
                'content' => [],
                'syndicate' => [],
            ],
            'core' => [
                'site',
                'mediawiki.page.ready',
            ],
            // modules that enhance the content in some way
            'content' => [],
            // modules relating to search functionality
            'search' => [],
            // Skins can register their own scripts
            'skin' => $this->options['scripts'] ?? [],
            // modules relating to functionality relating to watching an article
            'watch' => [],
            // modules which relate to the current users preferences
            'user' => [],
            // modules relating to RSS/Atom Feeds
            'syndicate' => [],
        ];
 
        // Preload jquery.tablesorter for mediawiki.page.ready
        if ( strpos( $out->getHTML(), 'sortable' ) !== false ) {
            $modules['content'][] = 'jquery.tablesorter';
            $modules['styles']['content'][] = 'jquery.tablesorter.styles';
        }
 
        // Preload jquery.makeCollapsible for mediawiki.page.ready
        if ( strpos( $out->getHTML(), 'mw-collapsible' ) !== false ) {
            $modules['content'][] = 'jquery.makeCollapsible';
            $modules['styles']['content'][] = 'jquery.makeCollapsible.styles';
        }
 
        // Deprecated since 1.26: Unconditional loading of mediawiki.ui.button
        // on every page is deprecated. Express a dependency instead.
        if ( strpos( $out->getHTML(), 'mw-ui-button' ) !== false ) {
            $modules['styles']['content'][] = 'mediawiki.ui.button';
        }
 
        if ( $out->isTOCEnabled() ) {
            $modules['content'][] = 'mediawiki.toc';
        }
 
        $authority = $this->getAuthority();
        if ( $authority->getPerformer()->isRegistered()
            && $authority->isAllowedAll( 'writeapi', 'viewmywatchlist', 'editmywatchlist' )
            && $this->getRelevantTitle()->canExist()
        ) {
            $modules['watch'][] = 'mediawiki.page.watch.ajax';
        }
 
        $userOptionsLookup = MediaWikiServices::getInstance()->getUserOptionsLookup();
        if ( $userOptionsLookup->getBoolOption( $user, 'editsectiononrightclick' )
            || ( $out->isArticle() && $userOptionsLookup->getOption( $user, 'editondblclick' ) )
        ) {
            $modules['user'][] = 'mediawiki.misc-authed-pref';
        }
 
        if ( $out->isSyndicated() ) {
            $modules['styles']['syndicate'][] = 'mediawiki.feedlink';
        }
 
        return $modules;
    }
 
    protected function preloadExistence() {
        $titles = [];
 
        // User/talk link
        $user = $this->getUser();
        if ( $user->isRegistered() ) {
            $titles[] = $user->getUserPage();
            $titles[] = $user->getTalkPage();
        }
 
        // Check, if the page can hold some kind of content, otherwise do nothing
        $title = $this->getRelevantTitle();
        if ( $title->canExist() && $title->canHaveTalkPage() ) {
            $namespaceInfo = MediaWikiServices::getInstance()->getNamespaceInfo();
            if ( $title->isTalkPage() ) {
                $titles[] = $namespaceInfo->getSubjectPage( $title );
            } else {
                $titles[] = $namespaceInfo->getTalkPage( $title );
            }
        }
 
        // Footer links (used by SkinTemplate::prepareQuickTemplate)
        if ( $this->getConfig()->get( 'FooterLinkCacheExpiry' ) <= 0 ) {
            $titles = array_merge(
                $titles,
                array_filter( [
                    $this->footerLinkTitle( 'privacy', 'privacypage' ),
                    $this->footerLinkTitle( 'aboutsite', 'aboutpage' ),
                    $this->footerLinkTitle( 'disclaimers', 'disclaimerpage' ),
                ] )
            );
        }
 
        $this->getHookRunner()->onSkinPreloadExistence( $titles, $this );
 
        if ( $titles ) {
            $linkBatchFactory = MediaWikiServices::getInstance()->getLinkBatchFactory();
            $lb = $linkBatchFactory->newLinkBatch( $titles );
            $lb->setCaller( __METHOD__ );
            $lb->execute();
        }
    }
 
    public function getRevisionId() {
        wfDeprecated( __METHOD__, '1.34' );
 
        return $this->getOutput()->getRevisionId();
    }
 
    public function isRevisionCurrent() {
        wfDeprecated( __METHOD__, '1.34' );
 
        return $this->getOutput()->isRevisionCurrent();
    }
 
    public function setRelevantTitle( $t ) {
        $this->mRelevantTitle = $t;
    }
 
    public function getRelevantTitle() {
        return $this->mRelevantTitle ?? $this->getTitle();
    }
 
    public function setRelevantUser( $u ) {
        $this->mRelevantUser = $u;
    }
 
    public function getRelevantUser() {
        if ( isset( $this->mRelevantUser ) ) {
            return $this->mRelevantUser;
        }
        $title = $this->getRelevantTitle();
        if ( $title->hasSubjectNamespace( NS_USER ) ) {
            $rootUser = $title->getRootText();
            if ( User::isIP( $rootUser ) ) {
                $this->mRelevantUser = User::newFromName( $rootUser, false );
            } else {
                $user = User::newFromName( $rootUser, false );
 
                if ( $user ) {
                    $user->load( User::READ_NORMAL );
 
                    if ( $user->isRegistered() ) {
                        $this->mRelevantUser = $user;
                    }
                }
            }
            return $this->mRelevantUser;
        }
        return null;
    }
 
    abstract public function outputPage();
 
    public static function makeVariablesScript( $data, $nonce = null ) {
        wfDeprecated( __METHOD__, '1.36' );
 
        if ( $data ) {
            return ResourceLoader::makeInlineScript(
                ResourceLoader::makeConfigSetScript( $data ),
                $nonce
            );
        }
        return '';
    }
 
    final public function doSetupSkinUserCss( OutputPage $out ) {
        if ( MWDebug::detectDeprecatedOverride( $this, __CLASS__, 'setupSkinUserCss', '1.32' ) ) {
            $this->setupSkinUserCss( $out );
        }
    }
 
    public function setupSkinUserCss( OutputPage $out ) {
        wfDeprecated( __METHOD__, '1.32' );
    }
 
    public function getPageClasses( $title ) {
        $numeric = 'ns-' . $title->getNamespace();
 
        if ( $title->isSpecialPage() ) {
            $type = 'ns-special';
            // T25315: provide a class based on the canonical special page name without subpages
            list( $canonicalName ) = MediaWikiServices::getInstance()->getSpecialPageFactory()->
                resolveAlias( $title->getDBkey() );
            if ( $canonicalName ) {
                $type .= ' ' . Sanitizer::escapeClass( "mw-special-$canonicalName" );
            } else {
                $type .= ' mw-invalidspecialpage';
            }
        } else {
            if ( $title->isTalkPage() ) {
                $type = 'ns-talk';
            } else {
                $type = 'ns-subject';
            }
            // T208315: add HTML class when the user can edit the page
            if ( $this->getAuthority()->probablyCan( 'edit', $title ) ) {
                $type .= ' mw-editable';
            }
        }
 
        $name = Sanitizer::escapeClass( 'page-' . $title->getPrefixedText() );
        $root = Sanitizer::escapeClass( 'rootpage-' . $title->getRootTitle()->getPrefixedText() );
 
        return "$numeric $type $name $root";
    }
 
    public function getHtmlElementAttributes() {
        $lang = $this->getLanguage();
        return [
            'lang' => $lang->getHtmlCode(),
            'dir' => $lang->getDir(),
            'class' => 'client-nojs',
        ];
    }
 
    protected function getLogo() {
        wfDeprecated( __METHOD__, '1.36' );
        return ResourceLoaderSkinModule::getAvailableLogos( $this->getConfig() )[ '1x' ];
    }
 
    public function getCategoryLinks() {
        $out = $this->getOutput();
        $allCats = $out->getCategoryLinks();
        $title = $this->getTitle();
        $services = MediaWikiServices::getInstance();
        $linkRenderer = $services->getLinkRenderer();
 
        if ( $allCats === [] ) {
            return '';
        }
 
        $embed = "<li>";
        $pop = "</li>";
 
        $s = '';
        $colon = $this->msg( 'colon-separator' )->escaped();
 
        if ( !empty( $allCats['normal'] ) ) {
            $t = $embed . implode( $pop . $embed, $allCats['normal'] ) . $pop;
 
            $msg = $this->msg( 'pagecategories' )->numParams( count( $allCats['normal'] ) );
            $linkPage = $this->msg( 'pagecategorieslink' )->inContentLanguage()->text();
            $pageCategoriesLinkTitle = Title::newFromText( $linkPage );
            if ( $pageCategoriesLinkTitle ) {
                $link = $linkRenderer->makeLink( $pageCategoriesLinkTitle, $msg->text() );
            } else {
                $link = $msg->escaped();
            }
            $s .= '<div id="mw-normal-catlinks" class="mw-normal-catlinks">' .
                $link . $colon . '<ul>' . $t . '</ul></div>';
        }
 
        # Hidden categories
        if ( isset( $allCats['hidden'] ) ) {
            $userOptionsLookup = $services->getUserOptionsLookup();
 
            if ( $userOptionsLookup->getBoolOption( $this->getUser(), 'showhiddencats' ) ) {
                $class = ' mw-hidden-cats-user-shown';
            } elseif ( $title->inNamespace( NS_CATEGORY ) ) {
                $class = ' mw-hidden-cats-ns-shown';
            } else {
                $class = ' mw-hidden-cats-hidden';
            }
 
            $s .= "<div id=\"mw-hidden-catlinks\" class=\"mw-hidden-catlinks$class\">" .
                $this->msg( 'hidden-categories' )->numParams( count( $allCats['hidden'] ) )->escaped() .
                $colon . '<ul>' . $embed . implode( $pop . $embed, $allCats['hidden'] ) . $pop . '</ul>' .
                '</div>';
        }
 
        # optional 'dmoz-like' category browser. Will be shown under the list
        # of categories an article belong to
        if ( $this->getConfig()->get( 'UseCategoryBrowser' ) ) {
            $s .= '<br /><hr />';
 
            # get a big array of the parents tree
            $parenttree = $title->getParentCategoryTree();
            # Skin object passed by reference cause it can not be
            # accessed under the method subfunction drawCategoryBrowser
            $tempout = explode( "\n", $this->drawCategoryBrowser( $parenttree ) );
            # Clean out bogus first entry and sort them
            unset( $tempout[0] );
            asort( $tempout );
            # Output one per line
            $s .= implode( "<br />\n", $tempout );
        }
 
        return $s;
    }
 
    protected function drawCategoryBrowser( $tree ) {
        $return = '';
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 
        foreach ( $tree as $element => $parent ) {
            if ( empty( $parent ) ) {
                # element start a new list
                $return .= "\n";
            } else {
                # grab the others elements
                $return .= $this->drawCategoryBrowser( $parent ) . ' &gt; ';
            }
 
            # add our current element to the list
            $eltitle = Title::newFromText( $element );
            $return .= $linkRenderer->makeLink( $eltitle, $eltitle->getText() );
        }
 
        return $return;
    }
 
    public function getCategories() {
        $userOptionsLookup = MediaWikiServices::getInstance()->getUserOptionsLookup();
        $showHiddenCats = $userOptionsLookup->getBoolOption( $this->getUser(), 'showhiddencats' );
 
        $catlinks = $this->getCategoryLinks();
        // Check what we're showing
        $allCats = $this->getOutput()->getCategoryLinks();
        $showHidden = $showHiddenCats || $this->getTitle()->inNamespace( NS_CATEGORY );
 
        $classes = [ 'catlinks' ];
        if ( empty( $allCats['normal'] ) && !( !empty( $allCats['hidden'] ) && $showHidden ) ) {
            $classes[] = 'catlinks-allhidden';
        }
 
        return Html::rawElement(
            'div',
            [ 'id' => 'catlinks', 'class' => $classes, 'data-mw' => 'interface' ],
            $catlinks
        );
    }
 
    protected function afterContentHook() {
        $data = '';
 
        if ( $this->getHookRunner()->onSkinAfterContent( $data, $this ) ) {
            // adding just some spaces shouldn't toggle the output
            // of the whole <div/>, so we use trim() here
            if ( trim( $data ) != '' ) {
                // Doing this here instead of in the skins to
                // ensure that the div has the same ID in all
                // skins
                $data = "<div id='mw-data-after-content'>\n" .
                    "\t$data\n" .
                    "</div>\n";
            }
        } else {
            wfDebug( "Hook SkinAfterContent changed output processing." );
        }
 
        return $data;
    }
 
    protected function generateDebugHTML() {
        wfDeprecated( __METHOD__, '1.35' );
        return MWDebug::getHTMLDebugLog();
    }
 
    public function bottomScripts() {
        // TODO and the suckage continues. This function is really just a wrapper around
        // OutputPage::getBottomScripts() which takes a Skin param. This should be cleaned
        // up at some point
        $chunks = [ $this->getOutput()->getBottomScripts() ];
 
        // Keep the hook appendage separate to preserve WrappedString objects.
        // This enables BaseTemplate::getTrail() to merge them where possible.
        $extraHtml = '';
        $this->getHookRunner()->onSkinAfterBottomScripts( $this, $extraHtml );
        if ( $extraHtml !== '' ) {
            $chunks[] = $extraHtml;
        }
        return WrappedString::join( "\n", $chunks );
    }
 
    public function printSource() {
        $title = $this->getTitle();
        $oldid = $this->getOutput()->getRevisionId();
        if ( $oldid ) {
            $canonicalUrl = $title->getCanonicalURL( 'oldid=' . $oldid );
            $url = htmlspecialchars( wfExpandIRI( $canonicalUrl ) );
        } else {
            // oldid not available for non existing pages
            $url = htmlspecialchars( wfExpandIRI( $title->getCanonicalURL() ) );
        }
 
        return $this->msg( 'retrievedfrom' )
            ->rawParams( '<a dir="ltr" href="' . $url . '">' . $url . '</a>' )
            ->parse();
    }
 
    public function getUndeleteLink() {
        $action = $this->getRequest()->getVal( 'action', 'view' );
        $title = $this->getTitle();
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 
        if ( ( !$title->exists() || $action == 'history' ) &&
            $this->getAuthority()->probablyCan( 'deletedhistory', $title )
        ) {
            $n = $title->getDeletedEditsCount();
 
            if ( $n ) {
                if ( $this->getAuthority()->probablyCan( 'undelete', $title ) ) {
                    $msg = 'thisisdeleted';
                } else {
                    $msg = 'viewdeleted';
                }
 
                $subtitle = $this->msg( $msg )->rawParams(
                    $linkRenderer->makeKnownLink(
                        SpecialPage::getTitleFor( 'Undelete', $title->getPrefixedDBkey() ),
                        $this->msg( 'restorelink' )->numParams( $n )->text() )
                    )->escaped();
 
                $links = [];
                // Add link to page logs, unless we're on the history page (which
                // already has one)
                if ( $action !== 'history' ) {
                    $links[] = $linkRenderer->makeKnownLink(
                        SpecialPage::getTitleFor( 'Log' ),
                        $this->msg( 'viewpagelogs-lowercase' )->text(),
                        [],
                        [ 'page' => $title->getPrefixedText() ]
                    );
                }
 
                // Allow extensions to add more links
                $this->getHookRunner()->onUndeletePageToolLinks(
                    $this->getContext(), $linkRenderer, $links );
 
                if ( $links ) {
                    $subtitle .= ''
                        . $this->msg( 'word-separator' )->escaped()
                        . $this->msg( 'parentheses' )
                            ->rawParams( $this->getLanguage()->pipeList( $links ) )
                            ->escaped();
                }
 
                return Html::rawElement( 'div', [ 'class' => 'mw-undelete-subtitle' ], $subtitle );
            }
        }
 
        return '';
    }
 
    public function subPageSubtitle( $out ) {
        wfDeprecated( __METHOD__, '1.36' );
        return $this->subPageSubtitleInternal();
    }
 
    private function subPageSubtitleInternal() {
        $services = MediaWikiServices::getInstance();
        $linkRenderer = $services->getLinkRenderer();
        $out = $this->getOutput();
        $title = $out->getTitle();
        $subpages = '';
 
        if ( !$this->getHookRunner()->onSkinSubPageSubtitle( $subpages, $this, $out ) ) {
            return $subpages;
        }
 
        $hasSubpages = $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() );
        if ( !$out->isArticle() || !$hasSubpages ) {
            return $subpages;
        }
 
        $ptext = $title->getPrefixedText();
        if ( strpos( $ptext, '/' ) !== false ) {
            $links = explode( '/', $ptext );
            array_pop( $links );
            $count = 0;
            $growingLink = '';
            $display = '';
            $lang = $this->getLanguage();
 
            foreach ( $links as $link ) {
                $growingLink .= $link;
                $display .= $link;
                $linkObj = Title::newFromText( $growingLink );
 
                if ( $linkObj && $linkObj->isKnown() ) {
                    $getlink = $linkRenderer->makeKnownLink( $linkObj, $display );
 
                    $count++;
 
                    if ( $count > 1 ) {
                        $subpages .= $lang->getDirMarkEntity() . $this->msg( 'pipe-separator' )->escaped();
                    } else {
                        $subpages .= '&lt; ';
                    }
 
                    $subpages .= $getlink;
                    $display = '';
                } else {
                    $display .= '/';
                }
                $growingLink .= '/';
            }
        }
 
        return $subpages;
    }
 
    protected function getSearchLink() {
        wfDeprecated( __METHOD__, '1.36' );
 
        $searchPage = SpecialPage::getTitleFor( 'Search' );
        return $searchPage->getLocalURL();
    }
 
    public function getCopyright( $type = 'detect' ) {
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
        if ( $type == 'detect' ) {
            if ( !$this->getOutput()->isRevisionCurrent()
                && !$this->msg( 'history_copyright' )->inContentLanguage()->isDisabled()
            ) {
                $type = 'history';
            } else {
                $type = 'normal';
            }
        }
 
        if ( $type == 'history' ) {
            $msg = 'history_copyright';
        } else {
            $msg = 'copyright';
        }
 
        $config = $this->getConfig();
 
        if ( $config->get( 'RightsPage' ) ) {
            $title = Title::newFromText( $config->get( 'RightsPage' ) );
            $link = $linkRenderer->makeKnownLink(
                $title, new HtmlArmor( $config->get( 'RightsText' ) ?: $title->getText() )
            );
        } elseif ( $config->get( 'RightsUrl' ) ) {
            $link = Linker::makeExternalLink( $config->get( 'RightsUrl' ), $config->get( 'RightsText' ) );
        } elseif ( $config->get( 'RightsText' ) ) {
            $link = $config->get( 'RightsText' );
        } else {
            # Give up now
            return '';
        }
 
        // Allow for site and per-namespace customization of copyright notice.
        $this->getHookRunner()->onSkinCopyrightFooter( $this->getTitle(), $type, $msg, $link );
 
        return $this->msg( $msg )->rawParams( $link )->text();
    }
 
    protected function getCopyrightIcon() {
        $out = '';
        $config = $this->getConfig();
 
        $footerIcons = $config->get( 'FooterIcons' );
        if ( $footerIcons['copyright']['copyright'] ) {
            $out = $footerIcons['copyright']['copyright'];
        } elseif ( $config->get( 'RightsIcon' ) ) {
            $icon = htmlspecialchars( $config->get( 'RightsIcon' ) );
            $url = $config->get( 'RightsUrl' );
 
            if ( $url ) {
                $out .= '<a href="' . htmlspecialchars( $url ) . '">';
            }
 
            $text = htmlspecialchars( $config->get( 'RightsText' ) );
            $out .= "<img src=\"$icon\" alt=\"$text\" width=\"88\" height=\"31\" />";
 
            if ( $url ) {
                $out .= '</a>';
            }
        }
 
        return $out;
    }
 
    protected function getPoweredBy() {
        $resourceBasePath = $this->getConfig()->get( 'ResourceBasePath' );
        $url1 = htmlspecialchars(
            "$resourceBasePath/resources/assets/poweredby_mediawiki_88x31.png"
        );
        $url1_5 = htmlspecialchars(
            "$resourceBasePath/resources/assets/poweredby_mediawiki_132x47.png"
        );
        $url2 = htmlspecialchars(
            "$resourceBasePath/resources/assets/poweredby_mediawiki_176x62.png"
        );
        $text = '<a href="https://www.mediawiki.org/"><img src="' . $url1
            . '" srcset="' . $url1_5 . ' 1.5x, ' . $url2 . ' 2x" '
            . 'height="31" width="88" alt="Powered by MediaWiki" loading="lazy" /></a>';
        $this->getHookRunner()->onSkinGetPoweredBy( $text, $this );
        return $text;
    }
 
    protected function lastModified() {
        $timestamp = $this->getOutput()->getRevisionTimestamp();
        $user = $this->getUser();
        $language = $this->getLanguage();
 
        # No cached timestamp, load it from the database
        if ( $timestamp === null ) {
            $revId = $this->getOutput()->getRevisionId();
            if ( $revId !== null ) {
                $timestamp = MediaWikiServices::getInstance()
                    ->getRevisionLookup()
                    ->getTimestampFromId( $revId );
            }
        }
 
        if ( $timestamp ) {
            $d = $language->userDate( $timestamp, $user );
            $t = $language->userTime( $timestamp, $user );
            $s = ' ' . $this->msg( 'lastmodifiedat', $d, $t )->parse();
        } else {
            $s = '';
        }
 
        if ( MediaWikiServices::getInstance()->getDBLoadBalancer()->getLaggedReplicaMode() ) {
            $s .= ' <strong>' . $this->msg( 'laggedreplicamode' )->parse() . '</strong>';
        }
 
        return $s;
    }
 
    public function logoText( $align = '' ) {
        if ( $align != '' ) {
            $a = " style='float: {$align};'";
        } else {
            $a = '';
        }
 
        $mp = $this->msg( 'mainpage' )->escaped();
        $mptitle = Title::newMainPage();
        $url = ( is_object( $mptitle ) ? htmlspecialchars( $mptitle->getLocalURL() ) : '' );
 
        $logourl = ResourceLoaderSkinModule::getAvailableLogos( $this->getConfig() )[ '1x' ];
        return "<a href='{$url}'><img{$a} src='{$logourl}' alt='[{$mp}]' /></a>";
    }
 
    public function makeFooterIcon( $icon, $withImage = 'withImage' ) {
        if ( is_string( $icon ) ) {
            $html = $icon;
        } else { // Assuming array
            $url = $icon["url"] ?? null;
            unset( $icon["url"] );
            if ( isset( $icon["src"] ) && $withImage === 'withImage' ) {
                // Lazy-load footer icons, since they're not part of the printed view.
                $icon["loading"] = 'lazy';
                // do this the lazy way, just pass icon data as an attribute array
                $html = Html::element( 'img', $icon );
            } else {
                $html = htmlspecialchars( $icon["alt"] );
            }
            if ( $url ) {
                $html = Html::rawElement( 'a',
                    [ "href" => $url, "target" => $this->getConfig()->get( 'ExternalLinkTarget' ) ],
                    $html );
            }
        }
        return $html;
    }
 
    public function mainPageLink() {
        wfDeprecated( __METHOD__, '1.36' );
 
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
        $s = $linkRenderer->makeKnownLink(
            Title::newMainPage(),
            $this->msg( 'mainpage' )->text()
        );
 
        return $s;
    }
 
    public function footerLink( $desc, $page ) {
        $title = $this->footerLinkTitle( $desc, $page );
 
        if ( !$title ) {
            return '';
        }
 
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
        return $linkRenderer->makeKnownLink(
            $title,
            $this->msg( $desc )->text()
        );
    }
 
    private function footerLinkTitle( $desc, $page ) {
        // If the link description has been disabled in the default language,
        if ( $this->msg( $desc )->inContentLanguage()->isDisabled() ) {
            // then it is disabled, for all languages.
            return null;
        }
        // Otherwise, we display the link for the user, described in their
        // language (which may or may not be the same as the default language),
        // but we make the link target be the one site-wide page.
        $title = Title::newFromText( $this->msg( $page )->inContentLanguage()->text() );
 
        return $title ?: null;
    }
 
    public function getSiteFooterLinks() {
        $callback = function () {
            return [
                'privacy' => $this->footerLink( 'privacy', 'privacypage' ),
                'about' => $this->footerLink( 'aboutsite', 'aboutpage' ),
                'disclaimer' => $this->footerLink( 'disclaimers', 'disclaimerpage' )
            ];
        };
 
        $services = MediaWikiServices::getInstance();
        $msgCache = $services->getMessageCache();
        $wanCache = $services->getMainWANObjectCache();
        $config = $this->getConfig();
 
        return ( $config->get( 'FooterLinkCacheExpiry' ) > 0 )
            ? $wanCache->getWithSetCallback(
                $wanCache->makeKey( 'footer-links' ),
                $config->get( 'FooterLinkCacheExpiry' ),
                $callback,
                [
                    'checkKeys' => [
                        // Unless there is both no exact $code override nor an i18n definition
                        // in the software, the only MediaWiki page to check is for $code.
                        $msgCache->getCheckKey( $this->getLanguage()->getCode() )
                    ],
                    'lockTSE' => 30
                ]
            )
            : $callback();
    }
 
    public function privacyLink() {
        wfDeprecated( __METHOD__, '1.36' );
        return $this->footerLink( 'privacy', 'privacypage' );
    }
 
    public function aboutLink() {
        wfDeprecated( __METHOD__, '1.36' );
        return $this->footerLink( 'aboutsite', 'aboutpage' );
    }
 
    public function disclaimerLink() {
        wfDeprecated( __METHOD__, '1.36' );
        return $this->footerLink( 'disclaimers', 'disclaimerpage' );
    }
 
    public function editUrlOptions() {
        $options = [ 'action' => 'edit' ];
        $out = $this->getOutput();
 
        if ( !$out->isRevisionCurrent() ) {
            $options['oldid'] = intval( $out->getRevisionId() );
        }
 
        return $options;
    }
 
    public function showEmailUser( $id ) {
        if ( $id instanceof User ) {
            $targetUser = $id;
        } else {
            $targetUser = User::newFromId( $id );
        }
 
        # The sending user must have a confirmed email address and the receiving
        # user must accept emails from the sender.
        return $this->getUser()->canSendEmail()
            && SpecialEmailUser::validateTarget( $targetUser, $this->getUser() ) === '';
    }
 
    public function getSkinStylePath( $name ) {
        if ( $this->stylename === null ) {
            $class = static::class;
            throw new MWException( "$class::\$stylename must be set to use getSkinStylePath()" );
        }
 
        return $this->getConfig()->get( 'StylePath' ) . "/{$this->stylename}/$name";
    }
 
    /* these are used extensively in SkinTemplate, but also some other places */
 
    public static function makeMainPageUrl( $urlaction = '' ) {
        $title = Title::newMainPage();
        self::checkTitle( $title, '' );
 
        return $title->getLinkURL( $urlaction );
    }
 
    public static function makeSpecialUrl( $name, $urlaction = '', $proto = null ) {
        $title = SpecialPage::getSafeTitleFor( $name );
        if ( $proto === null ) {
            return $title->getLocalURL( $urlaction );
        } else {
            return $title->getFullURL( $urlaction, false, $proto );
        }
    }
 
    public static function makeSpecialUrlSubpage( $name, $subpage, $urlaction = '' ) {
        $title = SpecialPage::getSafeTitleFor( $name, $subpage );
        return $title->getLocalURL( $urlaction );
    }
 
    public static function makeUrl( $name, $urlaction = '' ) {
        wfDeprecated( __METHOD__, '1.36' );
 
        $title = Title::newFromText( $name );
        self::checkTitle( $title, $name );
        return $title->getLocalURL( $urlaction );
    }
 
    public static function makeInternalOrExternalUrl( $name ) {
        if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $name ) ) {
            return $name;
        } else {
            $title = Title::newFromText( $name );
            self::checkTitle( $title, $name );
            return $title->getLocalURL();
        }
    }
 
    public static function makeNSUrl( $name, $urlaction = '', $namespace = NS_MAIN ) {
        wfDeprecated( __METHOD__, '1.35' );
        $title = Title::makeTitleSafe( $namespace, $name );
        self::checkTitle( $title, $name );
 
        return $title->getLocalURL( $urlaction );
    }
 
    protected static function makeUrlDetails( $name, $urlaction = '' ) {
        $title = Title::newFromText( $name );
        self::checkTitle( $title, $name );
 
        return [
            'href' => $title->getLocalURL( $urlaction ),
            'exists' => $title->isKnown(),
        ];
    }
 
    protected static function makeKnownUrlDetails( $name, $urlaction = '' ) {
        $title = Title::newFromText( $name );
        self::checkTitle( $title, $name );
 
        return [
            'href' => $title->getLocalURL( $urlaction ),
            'exists' => true
        ];
    }
 
    public static function checkTitle( &$title, $name ) {
        if ( !is_object( $title ) ) {
            $title = Title::newFromText( $name );
            if ( !is_object( $title ) ) {
                $title = Title::newFromText( '--error: link target missing--' );
            }
        }
    }
 
    public function mapInterwikiToLanguage( $code ) {
        $map = $this->getConfig()->get( 'InterlanguageLinkCodeMap' );
        return $map[ $code ] ?? $code;
    }
 
    public function getLanguages() {
        if ( $this->getConfig()->get( 'HideInterlanguageLinks' ) ) {
            return [];
        }
        $hookContainer = MediaWikiServices::getInstance()->getHookContainer();
 
        $userLang = $this->getLanguage();
        $languageLinks = [];
        $langNameUtils = MediaWikiServices::getInstance()->getLanguageNameUtils();
 
        foreach ( $this->getOutput()->getLanguageLinks() as $languageLinkText ) {
            $class = 'interlanguage-link interwiki-' . explode( ':', $languageLinkText, 2 )[0];
 
            $languageLinkTitle = Title::newFromText( $languageLinkText );
            if ( !$languageLinkTitle ) {
                continue;
            }
 
            $ilInterwikiCode = $this->mapInterwikiToLanguage( $languageLinkTitle->getInterwiki() );
 
            $ilLangName = $langNameUtils->getLanguageName( $ilInterwikiCode );
 
            if ( strval( $ilLangName ) === '' ) {
                $ilDisplayTextMsg = $this->msg( "interlanguage-link-$ilInterwikiCode" );
                if ( !$ilDisplayTextMsg->isDisabled() ) {
                    // Use custom MW message for the display text
                    $ilLangName = $ilDisplayTextMsg->text();
                } else {
                    // Last resort: fallback to the language link target
                    $ilLangName = $languageLinkText;
                }
            } else {
                // Use the language autonym as display text
                $ilLangName = $this->getLanguage()->ucfirst( $ilLangName );
            }
 
            // CLDR extension or similar is required to localize the language name;
            // otherwise we'll end up with the autonym again.
            $ilLangLocalName = $langNameUtils->getLanguageName(
                $ilInterwikiCode,
                $userLang->getCode()
            );
 
            $languageLinkTitleText = $languageLinkTitle->getText();
            if ( $ilLangLocalName === '' ) {
                $ilFriendlySiteName = $this->msg( "interlanguage-link-sitename-$ilInterwikiCode" );
                if ( !$ilFriendlySiteName->isDisabled() ) {
                    if ( $languageLinkTitleText === '' ) {
                        $ilTitle = $this->msg(
                            'interlanguage-link-title-nonlangonly',
                            $ilFriendlySiteName->text()
                        )->text();
                    } else {
                        $ilTitle = $this->msg(
                            'interlanguage-link-title-nonlang',
                            $languageLinkTitleText,
                            $ilFriendlySiteName->text()
                        )->text();
                    }
                } else {
                    // we have nothing friendly to put in the title, so fall back to
                    // displaying the interlanguage link itself in the title text
                    // (similar to what is done in page content)
                    $ilTitle = $languageLinkTitle->getInterwiki() .
                        ":$languageLinkTitleText";
                }
            } elseif ( $languageLinkTitleText === '' ) {
                $ilTitle = $this->msg(
                    'interlanguage-link-title-langonly',
                    $ilLangLocalName
                )->text();
            } else {
                $ilTitle = $this->msg(
                    'interlanguage-link-title',
                    $languageLinkTitleText,
                    $ilLangLocalName
                )->text();
            }
 
            $ilInterwikiCodeBCP47 = LanguageCode::bcp47( $ilInterwikiCode );
            $languageLink = [
                'href' => $languageLinkTitle->getFullURL(),
                'text' => $ilLangName,
                'title' => $ilTitle,
                'class' => $class,
                'link-class' => 'interlanguage-link-target',
                'lang' => $ilInterwikiCodeBCP47,
                'hreflang' => $ilInterwikiCodeBCP47,
            ];
            $hookContainer->run(
                'SkinTemplateGetLanguageLink',
                [ &$languageLink, $languageLinkTitle, $this->getTitle(), $this->getOutput() ],
                []
            );
            $languageLinks[] = $languageLink;
        }
 
        return $languageLinks;
    }
 
    protected function buildNavUrls() {
        $out = $this->getOutput();
        $title = $this->getTitle();
        $thispage = $title->getPrefixedDBkey();
        $uploadNavigationUrl = $this->getConfig()->get( 'UploadNavigationUrl' );
 
        $nav_urls = [];
        $nav_urls['mainpage'] = [ 'href' => self::makeMainPageUrl() ];
        if ( $uploadNavigationUrl ) {
            $nav_urls['upload'] = [ 'href' => $uploadNavigationUrl ];
        } elseif ( UploadBase::isEnabled() && UploadBase::isAllowed( $this->getUser() ) === true ) {
            $nav_urls['upload'] = [ 'href' => self::makeSpecialUrl( 'Upload' ) ];
        } else {
            $nav_urls['upload'] = false;
        }
        $nav_urls['specialpages'] = [ 'href' => self::makeSpecialUrl( 'Specialpages' ) ];
 
        $nav_urls['print'] = false;
        $nav_urls['permalink'] = false;
        $nav_urls['info'] = false;
        $nav_urls['whatlinkshere'] = false;
        $nav_urls['recentchangeslinked'] = false;
        $nav_urls['contributions'] = false;
        $nav_urls['log'] = false;
        $nav_urls['blockip'] = false;
        $nav_urls['mute'] = false;
        $nav_urls['emailuser'] = false;
        $nav_urls['userrights'] = false;
 
        // A print stylesheet is attached to all pages, but nobody ever
        // figures that out. :)  Add a link...
        if ( !$out->isPrintable() && ( $out->isArticle() || $title->isSpecialPage() ) ) {
            $nav_urls['print'] = [
                'text' => $this->msg( 'printableversion' )->text(),
                'href' => 'javascript:print();'
            ];
        }
 
        if ( $out->isArticle() ) {
            // Also add a "permalink" while we're at it
            $revid = $out->getRevisionId();
            if ( $revid ) {
                $nav_urls['permalink'] = [
                    'text' => $this->msg( 'permalink' )->text(),
                    'href' => $title->getLocalURL( "oldid=$revid" )
                ];
            }
        }
 
        if ( $out->isArticleRelated() ) {
            $nav_urls['whatlinkshere'] = [
                'href' => SpecialPage::getTitleFor( 'Whatlinkshere', $thispage )->getLocalURL()
            ];
 
            $nav_urls['info'] = [
                'text' => $this->msg( 'pageinfo-toolboxlink' )->text(),
                'href' => $title->getLocalURL( "action=info" )
            ];
 
            if ( $title->exists() || $title->inNamespace( NS_CATEGORY ) ) {
                $nav_urls['recentchangeslinked'] = [
                    'href' => SpecialPage::getTitleFor( 'Recentchangeslinked', $thispage )->getLocalURL()
                ];
            }
        }
 
        $user = $this->getRelevantUser();
 
        // The relevant user should only be set if it exists. However, if it exists but is hidden,
        // and the viewer cannot see hidden users, this exposes the fact that the user exists;
        // pretend like the user does not exist in such cases, by setting $user to null, which
        // is what getRelevantUser returns if there is no user set (though it is documented as
        // always returning a User...) See T120883
        if ( $user && $user->isRegistered() && $user->isHidden() &&
             !$this->getAuthority()->isAllowed( 'hideuser' )
        ) {
            $user = null;
        }
 
        if ( $user ) {
            $rootUser = $user->getName();
 
            $nav_urls['contributions'] = [
                'text' => $this->msg( 'tool-link-contributions', $rootUser )->text(),
                'href' => self::makeSpecialUrlSubpage( 'Contributions', $rootUser ),
                'tooltip-params' => [ $rootUser ],
            ];
 
            $nav_urls['log'] = [
                'href' => self::makeSpecialUrlSubpage( 'Log', $rootUser )
            ];
 
            if ( $this->getAuthority()->isAllowed( 'block' ) ) {
                $nav_urls['blockip'] = [
                    'text' => $this->msg( 'blockip', $rootUser )->text(),
                    'href' => self::makeSpecialUrlSubpage( 'Block', $rootUser )
                ];
            }
 
            if ( $this->showEmailUser( $user ) ) {
                $nav_urls['emailuser'] = [
                    'text' => $this->msg( 'tool-link-emailuser', $rootUser )->text(),
                    'href' => self::makeSpecialUrlSubpage( 'Emailuser', $rootUser ),
                    'tooltip-params' => [ $rootUser ],
                ];
            }
 
            if ( !$user->isAnon() ) {
                if ( $this->getUser()->isRegistered() && $this->getConfig()->get( 'EnableSpecialMute' ) ) {
                    $nav_urls['mute'] = [
                        'text' => $this->msg( 'mute-preferences' )->text(),
                        'href' => self::makeSpecialUrlSubpage( 'Mute', $rootUser )
                    ];
                }
 
                $sur = new UserrightsPage;
                $sur->setContext( $this->getContext() );
                $canChange = $sur->userCanChangeRights( $user );
                $nav_urls['userrights'] = [
                    'text' => $this->msg(
                        $canChange ? 'tool-link-userrights' : 'tool-link-userrights-readonly',
                        $rootUser
                    )->text(),
                    'href' => self::makeSpecialUrlSubpage( 'Userrights', $rootUser )
                ];
            }
        }
 
        return $nav_urls;
    }
 
    final protected function buildFeedUrls() {
        $feeds = [];
        $out = $this->getOutput();
        if ( $out->isSyndicated() ) {
            foreach ( $out->getSyndicationLinks() as $format => $link ) {
                $feeds[$format] = [
                    // Messages: feed-atom, feed-rss
                    'text' => $this->msg( "feed-$format" )->text(),
                    'href' => $link
                ];
            }
        }
        return $feeds;
    }
 
    public function buildSidebar() {
        $services = MediaWikiServices::getInstance();
        $callback = function ( $old = null, &$ttl = null ) {
            $bar = [];
            $this->addToSidebar( $bar, 'sidebar' );
            $this->getHookRunner()->onSkinBuildSidebar( $this, $bar );
            $msgCache = MediaWikiServices::getInstance()->getMessageCache();
            if ( $msgCache->isDisabled() ) {
                $ttl = WANObjectCache::TTL_UNCACHEABLE; // bug T133069
            }
 
            return $bar;
        };
 
        $msgCache = $services->getMessageCache();
        $wanCache = $services->getMainWANObjectCache();
        $config = $this->getConfig();
        $languageCode = $this->getLanguage()->getCode();
 
        $sidebar = $config->get( 'EnableSidebarCache' )
            ? $wanCache->getWithSetCallback(
                $wanCache->makeKey( 'sidebar', $languageCode ),
                $config->get( 'SidebarCacheExpiry' ),
                $callback,
                [
                    'checkKeys' => [
                        // Unless there is both no exact $code override nor an i18n definition
                        // in the software, the only MediaWiki page to check is for $code.
                        $msgCache->getCheckKey( $languageCode )
                    ],
                    'lockTSE' => 30
                ]
            )
            : $callback();
 
        $sidebar['TOOLBOX'] = $this->makeToolbox(
            $this->buildNavUrls(),
            $this->buildFeedUrls()
        );
        $sidebar['LANGUAGES'] = $this->getLanguages();
        // Apply post-processing to the cached value
        $this->getHookRunner()->onSidebarBeforeOutput( $this, $sidebar );
 
        return $sidebar;
    }
 
    public function addToSidebar( &$bar, $message ) {
        $this->addToSidebarPlain( $bar, $this->msg( $message )->inContentLanguage()->plain() );
    }
 
    public function addToSidebarPlain( &$bar, $text ) {
        $lines = explode( "\n", $text );
 
        $heading = '';
        $config = $this->getConfig();
        $messageTitle = $config->get( 'EnableSidebarCache' )
            ? Title::newMainPage() : $this->getTitle();
        $messageCache = MediaWikiServices::getInstance()->getMessageCache();
 
        foreach ( $lines as $line ) {
            if ( strpos( $line, '*' ) !== 0 ) {
                continue;
            }
            $line = rtrim( $line, "\r" ); // for Windows compat
 
            if ( strpos( $line, '**' ) !== 0 ) {
                $heading = trim( $line, '* ' );
                if ( !array_key_exists( $heading, $bar ) ) {
                    $bar[$heading] = [];
                }
            } else {
                $line = trim( $line, '* ' );
 
                if ( strpos( $line, '|' ) !== false ) { // sanity check
                    $line = $messageCache->transform( $line, false, null, $messageTitle );
                    $line = array_map( 'trim', explode( '|', $line, 2 ) );
                    if ( count( $line ) !== 2 ) {
                        // Second sanity check, could be hit by people doing
                        // funky stuff with parserfuncs... (T35321)
                        continue;
                    }
 
                    $extraAttribs = [];
 
                    $msgLink = $this->msg( $line[0] )->title( $messageTitle )->inContentLanguage();
                    if ( $msgLink->exists() ) {
                        $link = $msgLink->text();
                        if ( $link == '-' ) {
                            continue;
                        }
                    } else {
                        $link = $line[0];
                    }
                    $msgText = $this->msg( $line[1] )->title( $messageTitle );
                    if ( $msgText->exists() ) {
                        $text = $msgText->text();
                    } else {
                        $text = $line[1];
                    }
 
                    if ( preg_match( '/^(?i:' . wfUrlProtocols() . ')/', $link ) ) {
                        $href = $link;
 
                        // Parser::getExternalLinkAttribs won't work here because of the Namespace things
                        if ( $config->get( 'NoFollowLinks' ) &&
                            !wfMatchesDomainList( $href, $config->get( 'NoFollowDomainExceptions' ) )
                        ) {
                            $extraAttribs['rel'] = 'nofollow';
                        }
 
                        if ( $config->get( 'ExternalLinkTarget' ) ) {
                            $extraAttribs['target'] = $config->get( 'ExternalLinkTarget' );
                        }
                    } else {
                        $title = Title::newFromText( $link );
 
                        if ( $title ) {
                            $title = $title->fixSpecialName();
                            $href = $title->getLinkURL();
                        } else {
                            $href = 'INVALID-TITLE';
                        }
                    }
 
                    $bar[$heading][] = array_merge( [
                        'text' => $text,
                        'href' => $href,
                        'id' => Sanitizer::escapeIdForAttribute( 'n-' . strtr( $line[1], ' ', '-' ) ),
                        'active' => false,
                    ], $extraAttribs );
                } else {
                    continue;
                }
            }
        }
 
        return $bar;
    }
 
    public function getNewtalks() {
        $newMessagesAlert = '';
        $user = $this->getUser();
        $services = MediaWikiServices::getInstance();
        $linkRenderer = $services->getLinkRenderer();
        $userHasNewMessages = $services->getTalkPageNotificationManager()
            ->userHasNewMessages( $user );
        $timestamp = $services->getTalkPageNotificationManager()
            ->getLatestSeenMessageTimestamp( $user );
        $newtalks = !$userHasNewMessages ? [] : [
            [
            // TODO: Deprecate adding wiki and link to array and redesign GetNewMessagesAlert hook
            'wiki' => WikiMap::getCurrentWikiId(),
            'link' => $user->getTalkPage()->getLocalURL(),
            'rev' => $timestamp ? $services->getRevisionLookup()
                ->getRevisionByTimestamp( $user->getTalkPage(), $timestamp ) : null
            ]
        ];
        $out = $this->getOutput();
 
        // Allow extensions to disable or modify the new messages alert
        if ( !$this->getHookRunner()->onGetNewMessagesAlert(
            $newMessagesAlert, $newtalks, $user, $out )
        ) {
            return '';
        }
        if ( $newMessagesAlert ) {
            return $newMessagesAlert;
        }
 
        if ( $newtalks !== [] ) {
            $uTalkTitle = $user->getTalkPage();
            $lastSeenRev = $newtalks[0]['rev'];
            $numAuthors = 0;
            if ( $lastSeenRev !== null ) {
                $plural = true; // Default if we have a last seen revision: if unknown, use plural
                $revStore = $services->getRevisionStore();
                $latestRev = $revStore->getRevisionByTitle(
                    $uTalkTitle,
                    0,
                    RevisionLookup::READ_NORMAL
                );
                if ( $latestRev !== null ) {
                    // Singular if only 1 unseen revision, plural if several unseen revisions.
                    $plural = $latestRev->getParentId() !== $lastSeenRev->getId();
                    $numAuthors = $revStore->countAuthorsBetween(
                        $uTalkTitle->getArticleID(),
                        $lastSeenRev,
                        $latestRev,
                        null,
                        10,
                        RevisionStore::INCLUDE_NEW
                    );
                }
            } else {
                // Singular if no revision -> diff link will show latest change only in any case
                $plural = false;
            }
            $plural = $plural ? 999 : 1;
            // 999 signifies "more than one revision". We don't know how many, and even if we did,
            // the number of revisions or authors is not necessarily the same as the number of
            // "messages".
            $newMessagesLink = $linkRenderer->makeKnownLink(
                $uTalkTitle,
                $this->msg( 'newmessageslinkplural' )->params( $plural )->text(),
                [],
                $uTalkTitle->isRedirect() ? [ 'redirect' => 'no' ] : []
            );
 
            $newMessagesDiffLink = $linkRenderer->makeKnownLink(
                $uTalkTitle,
                $this->msg( 'newmessagesdifflinkplural' )->params( $plural )->text(),
                [],
                $lastSeenRev !== null
                    ? [ 'oldid' => $lastSeenRev->getId(), 'diff' => 'cur' ]
                    : [ 'diff' => 'cur' ]
            );
 
            if ( $numAuthors >= 1 && $numAuthors <= 10 ) {
                $newMessagesAlert = $this->msg(
                    'youhavenewmessagesfromusers',
                    $newMessagesLink,
                    $newMessagesDiffLink
                )->numParams( $numAuthors, $plural );
            } else {
                // $numAuthors === 11 signifies "11 or more" ("more than 10")
                $newMessagesAlert = $this->msg(
                    $numAuthors > 10 ? 'youhavenewmessagesmanyusers' : 'youhavenewmessages',
                    $newMessagesLink,
                    $newMessagesDiffLink
                )->numParams( $plural );
            }
            $newMessagesAlert = $newMessagesAlert->text();
            // Disable CDN cache
            $out->setCdnMaxage( 0 );
        }
 
        return $newMessagesAlert;
    }
 
    private function getCachedNotice( $name ) {
        $config = $this->getConfig();
 
        if ( $name === 'default' ) {
            // special case
            $notice = $config->get( 'SiteNotice' );
            if ( empty( $notice ) ) {
                return false;
            }
        } else {
            $msg = $this->msg( $name )->inContentLanguage();
            if ( $msg->isBlank() ) {
                return '';
            } elseif ( $msg->isDisabled() ) {
                return false;
            }
            $notice = $msg->plain();
        }
 
        $services = MediaWikiServices::getInstance();
        $cache = $services->getMainWANObjectCache();
        $parsed = $cache->getWithSetCallback(
            // Use the extra hash appender to let eg SSL variants separately cache
            // Key is verified with md5 hash of unparsed wikitext
            $cache->makeKey( $name, $config->get( 'RenderHashAppend' ), md5( $notice ) ),
            // TTL in seconds
            600,
            function () use ( $notice ) {
                return $this->getOutput()->parseAsInterface( $notice );
            }
        );
 
        $contLang = $services->getContentLanguage();
        return Html::rawElement(
            'div',
            [
                'id' => 'localNotice',
                'lang' => $contLang->getHtmlCode(),
                'dir' => $contLang->getDir()
            ],
            $parsed
        );
    }
 
    public function getSiteNotice() {
        $siteNotice = '';
 
        if ( $this->getHookRunner()->onSiteNoticeBefore( $siteNotice, $this ) ) {
            if ( $this->getUser()->isRegistered() ) {
                $siteNotice = $this->getCachedNotice( 'sitenotice' );
            } else {
                $anonNotice = $this->getCachedNotice( 'anonnotice' );
                if ( $anonNotice === false ) {
                    $siteNotice = $this->getCachedNotice( 'sitenotice' );
                } else {
                    $siteNotice = $anonNotice;
                }
            }
            if ( $siteNotice === false ) {
                $siteNotice = $this->getCachedNotice( 'default' ) ?: '';
            }
        }
 
        $this->getHookRunner()->onSiteNoticeAfter( $siteNotice, $this );
        return $siteNotice;
    }
 
    public function doEditSectionLink( Title $nt, $section, $tooltip, Language $lang ) {
        // HTML generated here should probably have userlangattributes
        // added to it for LTR text on RTL pages
 
        $attribs = [];
        if ( $tooltip !== null ) {
            $attribs['title'] = $this->msg( 'editsectionhint' )->rawParams( $tooltip )
                ->inLanguage( $lang )->text();
        }
 
        $links = [
            'editsection' => [
                'text' => $this->msg( 'editsection' )->inLanguage( $lang )->text(),
                'targetTitle' => $nt,
                'attribs' => $attribs,
                'query' => [ 'action' => 'edit', 'section' => $section ]
            ]
        ];
 
        $this->getHookRunner()->onSkinEditSectionLinks( $this, $nt, $section, $tooltip, $links, $lang );
 
        $result = '<span class="mw-editsection"><span class="mw-editsection-bracket">[</span>';
 
        $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
        $linksHtml = [];
        foreach ( $links as $k => $linkDetails ) {
            $linksHtml[] = $linkRenderer->makeKnownLink(
                $linkDetails['targetTitle'],
                $linkDetails['text'],
                $linkDetails['attribs'],
                $linkDetails['query']
            );
        }
 
        $result .= implode(
            '<span class="mw-editsection-divider">'
                . $this->msg( 'pipe-separator' )->inLanguage( $lang )->escaped()
                . '</span>',
            $linksHtml
        );
 
        $result .= '<span class="mw-editsection-bracket">]</span></span>';
        return $result;
    }
 
    public function makeToolbox( $navUrls, $feedUrls ) {
        $toolbox = [];
        if ( $navUrls['whatlinkshere'] ?? null ) {
            $toolbox['whatlinkshere'] = $navUrls['whatlinkshere'];
            $toolbox['whatlinkshere']['id'] = 't-whatlinkshere';
        }
        if ( $navUrls['recentchangeslinked'] ?? null ) {
            $toolbox['recentchangeslinked'] = $navUrls['recentchangeslinked'];
            $toolbox['recentchangeslinked']['msg'] = 'recentchangeslinked-toolbox';
            $toolbox['recentchangeslinked']['id'] = 't-recentchangeslinked';
            $toolbox['recentchangeslinked']['rel'] = 'nofollow';
        }
        if ( $feedUrls ) {
            $toolbox['feeds']['id'] = 'feedlinks';
            $toolbox['feeds']['links'] = [];
            foreach ( $feedUrls as $key => $feed ) {
                $toolbox['feeds']['links'][$key] = $feed;
                $toolbox['feeds']['links'][$key]['id'] = "feed-$key";
                $toolbox['feeds']['links'][$key]['rel'] = 'alternate';
                $toolbox['feeds']['links'][$key]['type'] = "application/{$key}+xml";
                $toolbox['feeds']['links'][$key]['class'] = 'feedlink';
            }
        }
        foreach ( [ 'contributions', 'log', 'blockip', 'emailuser', 'mute',
            'userrights', 'upload', 'specialpages' ] as $special
        ) {
            if ( $navUrls[$special] ?? null ) {
                $toolbox[$special] = $navUrls[$special];
                $toolbox[$special]['id'] = "t-$special";
            }
        }
        if ( $navUrls['print'] ?? null ) {
            $toolbox['print'] = $navUrls['print'];
            $toolbox['print']['id'] = 't-print';
            $toolbox['print']['rel'] = 'alternate';
            $toolbox['print']['msg'] = 'printableversion';
        }
        if ( $navUrls['permalink'] ?? null ) {
            $toolbox['permalink'] = $navUrls['permalink'];
            $toolbox['permalink']['id'] = 't-permalink';
        }
        if ( $navUrls['info'] ?? null ) {
            $toolbox['info'] = $navUrls['info'];
            $toolbox['info']['id'] = 't-info';
        }
 
        return $toolbox;
    }
 
    final public function getIndicatorsHTML( $indicators ) {
        wfDeprecated( __METHOD__, '1.36' );
 
        $out = "<div class=\"mw-indicators mw-body-content\">\n";
        foreach ( $this->getIndicatorsData( $indicators ) as $indicatorData ) {
            $out .= Html::rawElement(
                'div',
                [
                    'id' => $indicatorData['id'],
                    'class' => $indicatorData['class']
                ],
                $indicatorData['html']
            ) . "\n";
        }
        $out .= "</div>\n";
        return $out;
    }
 
    protected function getIndicatorsData( $indicators ) {
        $indicatorData = [];
        foreach ( $indicators as $id => $content ) {
            $indicatorData[] = [
                'id' => Sanitizer::escapeIdForAttribute( "mw-indicator-$id" ),
                'class' => 'mw-indicator',
                'html' => $content,
            ];
        }
        return $indicatorData;
    }
 
    final public function getPersonalToolsForMakeListItem( $urls ) {
        $personal_tools = [];
        foreach ( $urls as $key => $plink ) {
            # The class on a personal_urls item is meant to go on the <a> instead
            # of the <li> so we have to use a single item "links" array instead
            # of using most of the personal_url's keys directly.
            $ptool = [
                'links' => [
                    [ 'single-id' => "pt-$key" ],
                ],
                'id' => "pt-$key",
            ];
            if ( isset( $plink['active'] ) ) {
                $ptool['active'] = $plink['active'];
            }
            // Set class for the link to link-class, when defined.
            // This allows newer notifications content navigation to retain their classes
            // when merged back into the personal tools.
            // Doing this here allows the loop below to overwrite the class if defined directly.
            if ( isset( $plink['link-class'] ) ) {
                $ptool['links'][0]['class'] = $plink['link-class'];
            }
            foreach ( [
                'href',
                'class',
                'text',
                'dir',
                'data',
                'exists',
                'data-mw'
            ] as $k ) {
                if ( isset( $plink[$k] ) ) {
                    $ptool['links'][0][$k] = $plink[$k];
                }
            }
            $personal_tools[$key] = $ptool;
        }
        return $personal_tools;
    }
 
    final public function makeLink( $key, $item, $options = [] ) {
        $text = $item['text'] ?? $this->msg( $item['msg'] ?? $key )->text();
 
        $html = htmlspecialchars( $text );
 
        if ( isset( $options['text-wrapper'] ) ) {
            $wrapper = $options['text-wrapper'];
            if ( isset( $wrapper['tag'] ) ) {
                $wrapper = [ $wrapper ];
            }
            while ( count( $wrapper ) > 0 ) {
                $element = array_pop( $wrapper );
                // @phan-suppress-next-line PhanTypeArraySuspiciousNullable
                $html = Html::rawElement( $element['tag'], $element['attributes'] ?? null, $html );
            }
        }
 
        if ( isset( $item['href'] ) || isset( $options['link-fallback'] ) ) {
            $attrs = $item;
            foreach ( [ 'single-id', 'text', 'msg', 'tooltiponly', 'context', 'primary',
                'tooltip-params', 'exists' ] as $k ) {
                unset( $attrs[$k] );
            }
 
            if ( isset( $attrs['data'] ) ) {
                foreach ( $attrs['data'] as $key => $value ) {
                    $attrs[ 'data-' . $key ] = $value;
                }
                unset( $attrs[ 'data' ] );
            }
 
            if ( isset( $item['id'] ) && !isset( $item['single-id'] ) ) {
                $item['single-id'] = $item['id'];
            }
 
            $tooltipParams = [];
            if ( isset( $item['tooltip-params'] ) ) {
                $tooltipParams = $item['tooltip-params'];
            }
 
            if ( isset( $item['single-id'] ) ) {
                $tooltipOption = isset( $item['exists'] ) && $item['exists'] === false ? 'nonexisting' : null;
 
                if ( isset( $item['tooltiponly'] ) && $item['tooltiponly'] ) {
                    $title = Linker::titleAttrib( $item['single-id'], $tooltipOption, $tooltipParams );
                    if ( $title !== false ) {
                        $attrs['title'] = $title;
                    }
                } else {
                    $tip = Linker::tooltipAndAccesskeyAttribs(
                        $item['single-id'],
                        $tooltipParams,
                        $tooltipOption
                    );
                    if ( isset( $tip['title'] ) && $tip['title'] !== false ) {
                        $attrs['title'] = $tip['title'];
                    }
                    if ( isset( $tip['accesskey'] ) && $tip['accesskey'] !== false ) {
                        $attrs['accesskey'] = $tip['accesskey'];
                    }
                }
            }
            if ( isset( $options['link-class'] ) ) {
                if ( isset( $attrs['class'] ) ) {
                    // In the future, this should accept an array of classes, not a string
                    if ( is_array( $attrs['class'] ) ) {
                        $attrs['class'][] = $options['link-class'];
                    } else {
                        $attrs['class'] .= " {$options['link-class']}";
                    }
                } else {
                    $attrs['class'] = $options['link-class'];
                }
            }
            $html = Html::rawElement( isset( $attrs['href'] )
                ? 'a'
                : $options['link-fallback'], $attrs, $html );
        }
 
        return $html;
    }
 
    final public function makeListItem( $key, $item, $options = [] ) {
        // In case this is still set from SkinTemplate, we don't want it to appear in
        // the HTML output (normally removed in SkinTemplate::buildContentActionUrls())
        unset( $item['redundant'] );
 
        if ( isset( $item['links'] ) ) {
            $links = [];
            foreach ( $item['links'] as $linkKey => $link ) {
                $links[] = $this->makeLink( $linkKey, $link, $options );
            }
            $html = implode( ' ', $links );
        } else {
            $link = $item;
            // These keys are used by makeListItem and shouldn't be passed on to the link
            foreach ( [ 'id', 'class', 'active', 'tag', 'itemtitle' ] as $k ) {
                unset( $link[$k] );
            }
            if ( isset( $item['id'] ) && !isset( $item['single-id'] ) ) {
                // The id goes on the <li> not on the <a> for single links
                // but makeSidebarLink still needs to know what id to use when
                // generating tooltips and accesskeys.
                $link['single-id'] = $item['id'];
            }
            if ( isset( $link['link-class'] ) ) {
                // link-class should be set on the <a> itself,
                // so pass it in as 'class'
                $link['class'] = $link['link-class'];
                unset( $link['link-class'] );
            }
            $html = $this->makeLink( $key, $link, $options );
        }
 
        $attrs = [];
        foreach ( [ 'id', 'class' ] as $attr ) {
            if ( isset( $item[$attr] ) ) {
                $attrs[$attr] = $item[$attr];
            }
        }
        if ( isset( $item['active'] ) && $item['active'] ) {
            if ( !isset( $attrs['class'] ) ) {
                $attrs['class'] = '';
            }
 
            // In the future, this should accept an array of classes, not a string
            if ( is_array( $attrs['class'] ) ) {
                $attrs['class'][] = 'active';
            } else {
                $attrs['class'] .= ' active';
                $attrs['class'] = trim( $attrs['class'] );
            }
        }
        if ( isset( $item['itemtitle'] ) ) {
            $attrs['title'] = $item['itemtitle'];
        }
        return Html::rawElement( $options['tag'] ?? 'li', $attrs, $html );
    }
 
    final public function makeSearchInput( $attrs = [] ) {
        $autoCapHint = $this->getConfig()->get( 'CapitalLinks' );
        $realAttrs = [
            'type' => 'search',
            'name' => 'search',
            'placeholder' => $this->msg( 'searchsuggest-search' )->text(),
            // T251664: Disable autocapitalization of input
            // method when using fully case-sensitive titles.
            'autocapitalize' => $autoCapHint ? 'sentences' : 'none',
        ];
 
        $realAttrs = array_merge( $realAttrs, Linker::tooltipAndAccesskeyAttribs( 'search' ), $attrs );
        return Html::element( 'input', $realAttrs );
    }
 
    final public function makeSearchButton( $mode, $attrs = [] ) {
        switch ( $mode ) {
            case 'go':
            case 'fulltext':
                $realAttrs = [
                    'type' => 'submit',
                    'name' => $mode,
                    'value' => $this->msg( $mode == 'go' ? 'searcharticle' : 'searchbutton' )->text(),
                ];
                $realAttrs = array_merge(
                    $realAttrs,
                    Linker::tooltipAndAccesskeyAttribs( "search-$mode" ),
                    $attrs
                );
                return Html::element( 'input', $realAttrs );
            case 'image':
                $buttonAttrs = [
                    'type' => 'submit',
                    'name' => 'button',
                ];
                $buttonAttrs = array_merge(
                    $buttonAttrs,
                    Linker::tooltipAndAccesskeyAttribs( 'search-fulltext' ),
                    $attrs
                );
                unset( $buttonAttrs['src'] );
                unset( $buttonAttrs['alt'] );
                unset( $buttonAttrs['width'] );
                unset( $buttonAttrs['height'] );
                $imgAttrs = [
                    'src' => $attrs['src'],
                    'alt' => $attrs['alt'] ?? $this->msg( 'searchbutton' )->text(),
                    'width' => $attrs['width'] ?? null,
                    'height' => $attrs['height'] ?? null,
                ];
                return Html::rawElement( 'button', $buttonAttrs, Html::element( 'img', $imgAttrs ) );
            default:
                throw new MWException( 'Unknown mode passed to BaseTemplate::makeSearchButton' );
        }
    }
 
    public function getAfterPortlet( string $name ) : string {
        $html = '';
 
        $this->getHookRunner()->onSkinAfterPortlet( $this, $name, $html );
 
        return $html;
    }
 
    final public function prepareSubtitle() {
        $out = $this->getOutput();
        $subpagestr = $this->subPageSubtitleInternal();
        if ( $subpagestr !== '' ) {
            $subpagestr = '<span class="subpages">' . $subpagestr . '</span>';
        }
        return $subpagestr . $out->getSubtitle();
    }
 
    protected function getFooterLinks(): array {
        $out = $this->getOutput();
        $title = $out->getTitle();
        $titleExists = $title->exists();
        $config = $this->getConfig();
        $maxCredits = $config->get( 'MaxCredits' );
        $showCreditsIfMax = $config->get( 'ShowCreditsIfMax' );
        $useCredits = $titleExists
            && $out->isArticle()
            && $out->isRevisionCurrent()
            && $maxCredits !== 0;
 
        if ( $useCredits ) {
            $article = Article::newFromWikiPage( $this->getWikiPage(), $this );
            $action = Action::factory( 'credits', $article, $this );
        }
 
        '@phan-var CreditsAction $action';
        $data = [
            'info' => [
                'lastmod' => !$useCredits ? $this->lastModified() : null,
                'numberofwatchingusers' => null,
                'credits' => $useCredits ?
                    $action->getCredits( $maxCredits, $showCreditsIfMax ) : null,
                'copyright' => $titleExists &&
                    $out->showsCopyright() ? $this->getCopyright() : null,
            ],
            'places' => $this->getSiteFooterLinks(),
        ];
        foreach ( $data as $key => $existingItems ) {
            $newItems = [];
            $this->getHookRunner()->onSkinAddFooterLinks( $this, $key, $newItems );
            $data[$key] = $existingItems + $newItems;
        }
        return $data;
    }
 
}