]> scripts.mit.edu Git - autoinstallsdev/mediawiki.git/blobdiff - includes/actions/InfoAction.php
MediaWiki 1.30.2
[autoinstallsdev/mediawiki.git] / includes / actions / InfoAction.php
diff --git a/includes/actions/InfoAction.php b/includes/actions/InfoAction.php
new file mode 100644 (file)
index 0000000..c5cd89f
--- /dev/null
@@ -0,0 +1,924 @@
+<?php
+/**
+ * Displays information about a page.
+ *
+ * Copyright © 2011 Alexandre Emsenhuber
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * @file
+ * @ingroup Actions
+ */
+
+use MediaWiki\MediaWikiServices;
+use Wikimedia\Rdbms\Database;
+
+/**
+ * Displays information about a page.
+ *
+ * @ingroup Actions
+ */
+class InfoAction extends FormlessAction {
+       const VERSION = 1;
+
+       /**
+        * Returns the name of the action this object responds to.
+        *
+        * @return string Lowercase name
+        */
+       public function getName() {
+               return 'info';
+       }
+
+       /**
+        * Whether this action can still be executed by a blocked user.
+        *
+        * @return bool
+        */
+       public function requiresUnblock() {
+               return false;
+       }
+
+       /**
+        * Whether this action requires the wiki not to be locked.
+        *
+        * @return bool
+        */
+       public function requiresWrite() {
+               return false;
+       }
+
+       /**
+        * Clear the info cache for a given Title.
+        *
+        * @since 1.22
+        * @param Title $title Title to clear cache for
+        * @param int|null $revid Revision id to clear
+        */
+       public static function invalidateCache( Title $title, $revid = null ) {
+               if ( !$revid ) {
+                       $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
+                       $revid = $revision ? $revision->getId() : null;
+               }
+               if ( $revid !== null ) {
+                       $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
+                       $key = self::getCacheKey( $cache, $title, $revid );
+                       $cache->delete( $key );
+               }
+       }
+
+       /**
+        * Shows page information on GET request.
+        *
+        * @return string Page information that will be added to the output
+        */
+       public function onView() {
+               $content = '';
+
+               // Validate revision
+               $oldid = $this->page->getOldID();
+               if ( $oldid ) {
+                       $revision = $this->page->getRevisionFetched();
+
+                       // Revision is missing
+                       if ( $revision === null ) {
+                               return $this->msg( 'missing-revision', $oldid )->parse();
+                       }
+
+                       // Revision is not current
+                       if ( !$revision->isCurrent() ) {
+                               return $this->msg( 'pageinfo-not-current' )->plain();
+                       }
+               }
+
+               // Page header
+               if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
+                       $content .= $this->msg( 'pageinfo-header' )->parse();
+               }
+
+               // Hide "This page is a member of # hidden categories" explanation
+               $content .= Html::element( 'style', [],
+                       '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
+
+               // Hide "Templates used on this page" explanation
+               $content .= Html::element( 'style', [],
+                       '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
+
+               // Get page information
+               $pageInfo = $this->pageInfo();
+
+               // Allow extensions to add additional information
+               Hooks::run( 'InfoAction', [ $this->getContext(), &$pageInfo ] );
+
+               // Render page information
+               foreach ( $pageInfo as $header => $infoTable ) {
+                       // Messages:
+                       // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
+                       // pageinfo-header-properties, pageinfo-category-info
+                       $content .= $this->makeHeader(
+                               $this->msg( "pageinfo-${header}" )->escaped(),
+                               "mw-pageinfo-${header}"
+                       ) . "\n";
+                       $table = "\n";
+                       foreach ( $infoTable as $infoRow ) {
+                               $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
+                               $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
+                               $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
+                               $table = $this->addRow( $table, $name, $value, $id ) . "\n";
+                       }
+                       $content = $this->addTable( $content, $table ) . "\n";
+               }
+
+               // Page footer
+               if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
+                       $content .= $this->msg( 'pageinfo-footer' )->parse();
+               }
+
+               return $content;
+       }
+
+       /**
+        * Creates a header that can be added to the output.
+        *
+        * @param string $header The header text.
+        * @param string $canonicalId
+        * @return string The HTML.
+        */
+       protected function makeHeader( $header, $canonicalId ) {
+               $spanAttribs = [ 'class' => 'mw-headline', 'id' => Sanitizer::escapeIdForAttribute( $header ) ];
+               $h2Attribs = [ 'id' => Sanitizer::escapeIdForAttribute( $canonicalId ) ];
+
+               return Html::rawElement( 'h2', $h2Attribs, Html::element( 'span', $spanAttribs, $header ) );
+       }
+
+       /**
+        * Adds a row to a table that will be added to the content.
+        *
+        * @param string $table The table that will be added to the content
+        * @param string $name The name of the row
+        * @param string $value The value of the row
+        * @param string $id The ID to use for the 'tr' element
+        * @return string The table with the row added
+        */
+       protected function addRow( $table, $name, $value, $id ) {
+               return $table .
+                       Html::rawElement(
+                               'tr',
+                               $id === null ? [] : [ 'id' => 'mw-' . $id ],
+                               Html::rawElement( 'td', [ 'style' => 'vertical-align: top;' ], $name ) .
+                                       Html::rawElement( 'td', [], $value )
+                       );
+       }
+
+       /**
+        * Adds a table to the content that will be added to the output.
+        *
+        * @param string $content The content that will be added to the output
+        * @param string $table The table
+        * @return string The content with the table added
+        */
+       protected function addTable( $content, $table ) {
+               return $content . Html::rawElement( 'table', [ 'class' => 'wikitable mw-page-info' ],
+                       $table );
+       }
+
+       /**
+        * Returns page information in an easily-manipulated format. Array keys are used so extensions
+        * may add additional information in arbitrary positions. Array values are arrays with one
+        * element to be rendered as a header, arrays with two elements to be rendered as a table row.
+        *
+        * @return array
+        */
+       protected function pageInfo() {
+               global $wgContLang;
+
+               $user = $this->getUser();
+               $lang = $this->getLanguage();
+               $title = $this->getTitle();
+               $id = $title->getArticleID();
+               $config = $this->context->getConfig();
+               $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
+
+               $pageCounts = $this->pageCounts( $this->page );
+
+               $pageProperties = [];
+               $props = PageProps::getInstance()->getAllProperties( $title );
+               if ( isset( $props[$id] ) ) {
+                       $pageProperties = $props[$id];
+               }
+
+               // Basic information
+               $pageInfo = [];
+               $pageInfo['header-basic'] = [];
+
+               // Display title
+               $displayTitle = $title->getPrefixedText();
+               if ( isset( $pageProperties['displaytitle'] ) ) {
+                       $displayTitle = $pageProperties['displaytitle'];
+               }
+
+               $pageInfo['header-basic'][] = [
+                       $this->msg( 'pageinfo-display-title' ), $displayTitle
+               ];
+
+               // Is it a redirect? If so, where to?
+               if ( $title->isRedirect() ) {
+                       $pageInfo['header-basic'][] = [
+                               $this->msg( 'pageinfo-redirectsto' ),
+                               $linkRenderer->makeLink( $this->page->getRedirectTarget() ) .
+                               $this->msg( 'word-separator' )->escaped() .
+                               $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
+                                       $this->page->getRedirectTarget(),
+                                       $this->msg( 'pageinfo-redirectsto-info' )->text(),
+                                       [],
+                                       [ 'action' => 'info' ]
+                               ) )->escaped()
+                       ];
+               }
+
+               // Default sort key
+               $sortKey = $title->getCategorySortkey();
+               if ( isset( $pageProperties['defaultsort'] ) ) {
+                       $sortKey = $pageProperties['defaultsort'];
+               }
+
+               $sortKey = htmlspecialchars( $sortKey );
+               $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-default-sort' ), $sortKey ];
+
+               // Page length (in bytes)
+               $pageInfo['header-basic'][] = [
+                       $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
+               ];
+
+               // Page ID (number not localised, as it's a database ID)
+               $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-article-id' ), $id ];
+
+               // Language in which the page content is (supposed to be) written
+               $pageLang = $title->getPageLanguage()->getCode();
+
+               $pageLangHtml = $pageLang . ' - ' .
+                       Language::fetchLanguageName( $pageLang, $lang->getCode() );
+               // Link to Special:PageLanguage with pre-filled page title if user has permissions
+               if ( $config->get( 'PageLanguageUseDB' )
+                       && $title->userCan( 'pagelang', $user )
+               ) {
+                       $pageLangHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
+                               SpecialPage::getTitleValueFor( 'PageLanguage', $title->getPrefixedText() ),
+                               $this->msg( 'pageinfo-language-change' )->text()
+                       ) )->escaped();
+               }
+
+               $pageInfo['header-basic'][] = [
+                       $this->msg( 'pageinfo-language' )->escaped(),
+                       $pageLangHtml
+               ];
+
+               // Content model of the page
+               $modelHtml = htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) );
+               // If the user can change it, add a link to Special:ChangeContentModel
+               if ( $config->get( 'ContentHandlerUseDB' )
+                       && $title->userCan( 'editcontentmodel', $user )
+               ) {
+                       $modelHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
+                               SpecialPage::getTitleValueFor( 'ChangeContentModel', $title->getPrefixedText() ),
+                               $this->msg( 'pageinfo-content-model-change' )->text()
+                       ) )->escaped();
+               }
+
+               $pageInfo['header-basic'][] = [
+                       $this->msg( 'pageinfo-content-model' ),
+                       $modelHtml
+               ];
+
+               if ( $title->inNamespace( NS_USER ) ) {
+                       $pageUser = User::newFromName( $title->getRootText() );
+                       if ( $pageUser && $pageUser->getId() && !$pageUser->isHidden() ) {
+                               $pageInfo['header-basic'][] = [
+                                       $this->msg( 'pageinfo-user-id' ),
+                                       $pageUser->getId()
+                               ];
+                       }
+               }
+
+               // Search engine status
+               $pOutput = new ParserOutput();
+               if ( isset( $pageProperties['noindex'] ) ) {
+                       $pOutput->setIndexPolicy( 'noindex' );
+               }
+               if ( isset( $pageProperties['index'] ) ) {
+                       $pOutput->setIndexPolicy( 'index' );
+               }
+
+               // Use robot policy logic
+               $policy = $this->page->getRobotPolicy( 'view', $pOutput );
+               $pageInfo['header-basic'][] = [
+                       // Messages: pageinfo-robot-index, pageinfo-robot-noindex
+                       $this->msg( 'pageinfo-robot-policy' ),
+                       $this->msg( "pageinfo-robot-${policy['index']}" )
+               ];
+
+               $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
+               if (
+                       $user->isAllowed( 'unwatchedpages' ) ||
+                       ( $unwatchedPageThreshold !== false &&
+                               $pageCounts['watchers'] >= $unwatchedPageThreshold )
+               ) {
+                       // Number of page watchers
+                       $pageInfo['header-basic'][] = [
+                               $this->msg( 'pageinfo-watchers' ),
+                               $lang->formatNum( $pageCounts['watchers'] )
+                       ];
+                       if (
+                               $config->get( 'ShowUpdatedMarker' ) &&
+                               isset( $pageCounts['visitingWatchers'] )
+                       ) {
+                               $minToDisclose = $config->get( 'UnwatchedPageSecret' );
+                               if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
+                                       $user->isAllowed( 'unwatchedpages' ) ) {
+                                       $pageInfo['header-basic'][] = [
+                                               $this->msg( 'pageinfo-visiting-watchers' ),
+                                               $lang->formatNum( $pageCounts['visitingWatchers'] )
+                                       ];
+                               } else {
+                                       $pageInfo['header-basic'][] = [
+                                               $this->msg( 'pageinfo-visiting-watchers' ),
+                                               $this->msg( 'pageinfo-few-visiting-watchers' )
+                                       ];
+                               }
+                       }
+               } elseif ( $unwatchedPageThreshold !== false ) {
+                       $pageInfo['header-basic'][] = [
+                               $this->msg( 'pageinfo-watchers' ),
+                               $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
+                       ];
+               }
+
+               // Redirects to this page
+               $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
+               $pageInfo['header-basic'][] = [
+                       $linkRenderer->makeLink(
+                               $whatLinksHere,
+                               $this->msg( 'pageinfo-redirects-name' )->text(),
+                               [],
+                               [
+                                       'hidelinks' => 1,
+                                       'hidetrans' => 1,
+                                       'hideimages' => $title->getNamespace() == NS_FILE
+                               ]
+                       ),
+                       $this->msg( 'pageinfo-redirects-value' )
+                               ->numParams( count( $title->getRedirectsHere() ) )
+               ];
+
+               // Is it counted as a content page?
+               if ( $this->page->isCountable() ) {
+                       $pageInfo['header-basic'][] = [
+                               $this->msg( 'pageinfo-contentpage' ),
+                               $this->msg( 'pageinfo-contentpage-yes' )
+                       ];
+               }
+
+               // Subpages of this page, if subpages are enabled for the current NS
+               if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
+                       $prefixIndex = SpecialPage::getTitleFor(
+                               'Prefixindex', $title->getPrefixedText() . '/' );
+                       $pageInfo['header-basic'][] = [
+                               $linkRenderer->makeLink(
+                                       $prefixIndex,
+                                       $this->msg( 'pageinfo-subpages-name' )->text()
+                               ),
+                               $this->msg( 'pageinfo-subpages-value' )
+                                       ->numParams(
+                                               $pageCounts['subpages']['total'],
+                                               $pageCounts['subpages']['redirects'],
+                                               $pageCounts['subpages']['nonredirects'] )
+                       ];
+               }
+
+               if ( $title->inNamespace( NS_CATEGORY ) ) {
+                       $category = Category::newFromTitle( $title );
+
+                       // $allCount is the total number of cat members,
+                       // not the count of how many members are normal pages.
+                       $allCount = (int)$category->getPageCount();
+                       $subcatCount = (int)$category->getSubcatCount();
+                       $fileCount = (int)$category->getFileCount();
+                       $pagesCount = $allCount - $subcatCount - $fileCount;
+
+                       $pageInfo['category-info'] = [
+                               [
+                                       $this->msg( 'pageinfo-category-total' ),
+                                       $lang->formatNum( $allCount )
+                               ],
+                               [
+                                       $this->msg( 'pageinfo-category-pages' ),
+                                       $lang->formatNum( $pagesCount )
+                               ],
+                               [
+                                       $this->msg( 'pageinfo-category-subcats' ),
+                                       $lang->formatNum( $subcatCount )
+                               ],
+                               [
+                                       $this->msg( 'pageinfo-category-files' ),
+                                       $lang->formatNum( $fileCount )
+                               ]
+                       ];
+               }
+
+               // Page protection
+               $pageInfo['header-restrictions'] = [];
+
+               // Is this page affected by the cascading protection of something which includes it?
+               if ( $title->isCascadeProtected() ) {
+                       $cascadingFrom = '';
+                       $sources = $title->getCascadeProtectionSources()[0];
+
+                       foreach ( $sources as $sourceTitle ) {
+                               $cascadingFrom .= Html::rawElement(
+                                       'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
+                       }
+
+                       $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
+                       $pageInfo['header-restrictions'][] = [
+                               $this->msg( 'pageinfo-protect-cascading-from' ),
+                               $cascadingFrom
+                       ];
+               }
+
+               // Is out protection set to cascade to other pages?
+               if ( $title->areRestrictionsCascading() ) {
+                       $pageInfo['header-restrictions'][] = [
+                               $this->msg( 'pageinfo-protect-cascading' ),
+                               $this->msg( 'pageinfo-protect-cascading-yes' )
+                       ];
+               }
+
+               // Page protection
+               foreach ( $title->getRestrictionTypes() as $restrictionType ) {
+                       $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
+
+                       if ( $protectionLevel == '' ) {
+                               // Allow all users
+                               $message = $this->msg( 'protect-default' )->escaped();
+                       } else {
+                               // Administrators only
+                               // Messages: protect-level-autoconfirmed, protect-level-sysop
+                               $message = $this->msg( "protect-level-$protectionLevel" );
+                               if ( $message->isDisabled() ) {
+                                       // Require "$1" permission
+                                       $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
+                               } else {
+                                       $message = $message->escaped();
+                               }
+                       }
+                       $expiry = $title->getRestrictionExpiry( $restrictionType );
+                       $formattedexpiry = $this->msg( 'parentheses',
+                               $lang->formatExpiry( $expiry ) )->escaped();
+                       $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
+
+                       // Messages: restriction-edit, restriction-move, restriction-create,
+                       // restriction-upload
+                       $pageInfo['header-restrictions'][] = [
+                               $this->msg( "restriction-$restrictionType" ), $message
+                       ];
+               }
+
+               if ( !$this->page->exists() ) {
+                       return $pageInfo;
+               }
+
+               // Edit history
+               $pageInfo['header-edits'] = [];
+
+               $firstRev = $this->page->getOldestRevision();
+               $lastRev = $this->page->getRevision();
+               $batch = new LinkBatch;
+
+               if ( $firstRev ) {
+                       $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
+                       if ( $firstRevUser !== '' ) {
+                               $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
+                               $batch->addObj( $firstRevUserTitle );
+                               $batch->addObj( $firstRevUserTitle->getTalkPage() );
+                       }
+               }
+
+               if ( $lastRev ) {
+                       $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
+                       if ( $lastRevUser !== '' ) {
+                               $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
+                               $batch->addObj( $lastRevUserTitle );
+                               $batch->addObj( $lastRevUserTitle->getTalkPage() );
+                       }
+               }
+
+               $batch->execute();
+
+               if ( $firstRev ) {
+                       // Page creator
+                       $pageInfo['header-edits'][] = [
+                               $this->msg( 'pageinfo-firstuser' ),
+                               Linker::revUserTools( $firstRev )
+                       ];
+
+                       // Date of page creation
+                       $pageInfo['header-edits'][] = [
+                               $this->msg( 'pageinfo-firsttime' ),
+                               $linkRenderer->makeKnownLink(
+                                       $title,
+                                       $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
+                                       [],
+                                       [ 'oldid' => $firstRev->getId() ]
+                               )
+                       ];
+               }
+
+               if ( $lastRev ) {
+                       // Latest editor
+                       $pageInfo['header-edits'][] = [
+                               $this->msg( 'pageinfo-lastuser' ),
+                               Linker::revUserTools( $lastRev )
+                       ];
+
+                       // Date of latest edit
+                       $pageInfo['header-edits'][] = [
+                               $this->msg( 'pageinfo-lasttime' ),
+                               $linkRenderer->makeKnownLink(
+                                       $title,
+                                       $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
+                                       [],
+                                       [ 'oldid' => $this->page->getLatest() ]
+                               )
+                       ];
+               }
+
+               // Total number of edits
+               $pageInfo['header-edits'][] = [
+                       $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
+               ];
+
+               // Total number of distinct authors
+               if ( $pageCounts['authors'] > 0 ) {
+                       $pageInfo['header-edits'][] = [
+                               $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
+                       ];
+               }
+
+               // Recent number of edits (within past 30 days)
+               $pageInfo['header-edits'][] = [
+                       $this->msg( 'pageinfo-recent-edits',
+                               $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
+                       $lang->formatNum( $pageCounts['recent_edits'] )
+               ];
+
+               // Recent number of distinct authors
+               $pageInfo['header-edits'][] = [
+                       $this->msg( 'pageinfo-recent-authors' ),
+                       $lang->formatNum( $pageCounts['recent_authors'] )
+               ];
+
+               // Array of MagicWord objects
+               $magicWords = MagicWord::getDoubleUnderscoreArray();
+
+               // Array of magic word IDs
+               $wordIDs = $magicWords->names;
+
+               // Array of IDs => localized magic words
+               $localizedWords = $wgContLang->getMagicWords();
+
+               $listItems = [];
+               foreach ( $pageProperties as $property => $value ) {
+                       if ( in_array( $property, $wordIDs ) ) {
+                               $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
+                       }
+               }
+
+               $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
+               $hiddenCategories = $this->page->getHiddenCategories();
+
+               if (
+                       count( $listItems ) > 0 ||
+                       count( $hiddenCategories ) > 0 ||
+                       $pageCounts['transclusion']['from'] > 0 ||
+                       $pageCounts['transclusion']['to'] > 0
+               ) {
+                       $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
+                       $transcludedTemplates = $title->getTemplateLinksFrom( $options );
+                       if ( $config->get( 'MiserMode' ) ) {
+                               $transcludedTargets = [];
+                       } else {
+                               $transcludedTargets = $title->getTemplateLinksTo( $options );
+                       }
+
+                       // Page properties
+                       $pageInfo['header-properties'] = [];
+
+                       // Magic words
+                       if ( count( $listItems ) > 0 ) {
+                               $pageInfo['header-properties'][] = [
+                                       $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
+                                       $localizedList
+                               ];
+                       }
+
+                       // Hidden categories
+                       if ( count( $hiddenCategories ) > 0 ) {
+                               $pageInfo['header-properties'][] = [
+                                       $this->msg( 'pageinfo-hidden-categories' )
+                                               ->numParams( count( $hiddenCategories ) ),
+                                       Linker::formatHiddenCategories( $hiddenCategories )
+                               ];
+                       }
+
+                       // Transcluded templates
+                       if ( $pageCounts['transclusion']['from'] > 0 ) {
+                               if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
+                                       $more = $this->msg( 'morenotlisted' )->escaped();
+                               } else {
+                                       $more = null;
+                               }
+
+                               $templateListFormatter = new TemplatesOnThisPageFormatter(
+                                       $this->getContext(),
+                                       $linkRenderer
+                               );
+
+                               $pageInfo['header-properties'][] = [
+                                       $this->msg( 'pageinfo-templates' )
+                                               ->numParams( $pageCounts['transclusion']['from'] ),
+                                       $templateListFormatter->format( $transcludedTemplates, false, $more )
+                               ];
+                       }
+
+                       if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
+                               if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
+                                       $more = $linkRenderer->makeLink(
+                                               $whatLinksHere,
+                                               $this->msg( 'moredotdotdot' )->text(),
+                                               [],
+                                               [ 'hidelinks' => 1, 'hideredirs' => 1 ]
+                                       );
+                               } else {
+                                       $more = null;
+                               }
+
+                               $templateListFormatter = new TemplatesOnThisPageFormatter(
+                                       $this->getContext(),
+                                       $linkRenderer
+                               );
+
+                               $pageInfo['header-properties'][] = [
+                                       $this->msg( 'pageinfo-transclusions' )
+                                               ->numParams( $pageCounts['transclusion']['to'] ),
+                                       $templateListFormatter->format( $transcludedTargets, false, $more )
+                               ];
+                       }
+               }
+
+               return $pageInfo;
+       }
+
+       /**
+        * Returns page counts that would be too "expensive" to retrieve by normal means.
+        *
+        * @param WikiPage|Article|Page $page
+        * @return array
+        */
+       protected function pageCounts( Page $page ) {
+               $fname = __METHOD__;
+               $config = $this->context->getConfig();
+               $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
+
+               return $cache->getWithSetCallback(
+                       self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
+                       WANObjectCache::TTL_WEEK,
+                       function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname ) {
+                               $title = $page->getTitle();
+                               $id = $title->getArticleID();
+
+                               $dbr = wfGetDB( DB_REPLICA );
+                               $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
+                               $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
+
+                               $watchedItemStore = MediaWikiServices::getInstance()->getWatchedItemStore();
+
+                               $result = [];
+                               $result['watchers'] = $watchedItemStore->countWatchers( $title );
+
+                               if ( $config->get( 'ShowUpdatedMarker' ) ) {
+                                       $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
+                                       $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
+                                               $title,
+                                               $updated - $config->get( 'WatchersMaxAge' )
+                                       );
+                               }
+
+                               // Total number of edits
+                               $edits = (int)$dbr->selectField(
+                                       'revision',
+                                       'COUNT(*)',
+                                       [ 'rev_page' => $id ],
+                                       $fname
+                               );
+                               $result['edits'] = $edits;
+
+                               // Total number of distinct authors
+                               if ( $config->get( 'MiserMode' ) ) {
+                                       $result['authors'] = 0;
+                               } else {
+                                       $result['authors'] = (int)$dbr->selectField(
+                                               'revision',
+                                               'COUNT(DISTINCT rev_user_text)',
+                                               [ 'rev_page' => $id ],
+                                               $fname
+                                       );
+                               }
+
+                               // "Recent" threshold defined by RCMaxAge setting
+                               $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
+
+                               // Recent number of edits
+                               $edits = (int)$dbr->selectField(
+                                       'revision',
+                                       'COUNT(rev_page)',
+                                       [
+                                               'rev_page' => $id,
+                                               "rev_timestamp >= " . $dbr->addQuotes( $threshold )
+                                       ],
+                                       $fname
+                               );
+                               $result['recent_edits'] = $edits;
+
+                               // Recent number of distinct authors
+                               $result['recent_authors'] = (int)$dbr->selectField(
+                                       'revision',
+                                       'COUNT(DISTINCT rev_user_text)',
+                                       [
+                                               'rev_page' => $id,
+                                               "rev_timestamp >= " . $dbr->addQuotes( $threshold )
+                                       ],
+                                       $fname
+                               );
+
+                               // Subpages (if enabled)
+                               if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
+                                       $conds = [ 'page_namespace' => $title->getNamespace() ];
+                                       $conds[] = 'page_title ' .
+                                               $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
+
+                                       // Subpages of this page (redirects)
+                                       $conds['page_is_redirect'] = 1;
+                                       $result['subpages']['redirects'] = (int)$dbr->selectField(
+                                               'page',
+                                               'COUNT(page_id)',
+                                               $conds,
+                                               $fname
+                                       );
+
+                                       // Subpages of this page (non-redirects)
+                                       $conds['page_is_redirect'] = 0;
+                                       $result['subpages']['nonredirects'] = (int)$dbr->selectField(
+                                               'page',
+                                               'COUNT(page_id)',
+                                               $conds,
+                                               $fname
+                                       );
+
+                                       // Subpages of this page (total)
+                                       $result['subpages']['total'] = $result['subpages']['redirects']
+                                               + $result['subpages']['nonredirects'];
+                               }
+
+                               // Counts for the number of transclusion links (to/from)
+                               if ( $config->get( 'MiserMode' ) ) {
+                                       $result['transclusion']['to'] = 0;
+                               } else {
+                                       $result['transclusion']['to'] = (int)$dbr->selectField(
+                                               'templatelinks',
+                                               'COUNT(tl_from)',
+                                               [
+                                                       'tl_namespace' => $title->getNamespace(),
+                                                       'tl_title' => $title->getDBkey()
+                                               ],
+                                               $fname
+                                       );
+                               }
+
+                               $result['transclusion']['from'] = (int)$dbr->selectField(
+                                       'templatelinks',
+                                       'COUNT(*)',
+                                       [ 'tl_from' => $title->getArticleID() ],
+                                       $fname
+                               );
+
+                               return $result;
+                       }
+               );
+       }
+
+       /**
+        * Returns the name that goes in the "<h1>" page title.
+        *
+        * @return string
+        */
+       protected function getPageTitle() {
+               return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
+       }
+
+       /**
+        * Get a list of contributors of $article
+        * @return string Html
+        */
+       protected function getContributors() {
+               $contributors = $this->page->getContributors();
+               $real_names = [];
+               $user_names = [];
+               $anon_ips = [];
+               $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
+
+               # Sift for real versus user names
+               /** @var User $user */
+               foreach ( $contributors as $user ) {
+                       $page = $user->isAnon()
+                               ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
+                               : $user->getUserPage();
+
+                       $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
+                       if ( $user->getId() == 0 ) {
+                               $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
+                       } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
+                               $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
+                       } else {
+                               $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
+                       }
+               }
+
+               $lang = $this->getLanguage();
+
+               $real = $lang->listToText( $real_names );
+
+               # "ThisSite user(s) A, B and C"
+               if ( count( $user_names ) ) {
+                       $user = $this->msg( 'siteusers' )
+                               ->rawParams( $lang->listToText( $user_names ) )
+                               ->params( count( $user_names ) )->escaped();
+               } else {
+                       $user = false;
+               }
+
+               if ( count( $anon_ips ) ) {
+                       $anon = $this->msg( 'anonusers' )
+                               ->rawParams( $lang->listToText( $anon_ips ) )
+                               ->params( count( $anon_ips ) )->escaped();
+               } else {
+                       $anon = false;
+               }
+
+               # This is the big list, all mooshed together. We sift for blank strings
+               $fulllist = [];
+               foreach ( [ $real, $user, $anon ] as $s ) {
+                       if ( $s !== '' ) {
+                               array_push( $fulllist, $s );
+                       }
+               }
+
+               $count = count( $fulllist );
+
+               # "Based on work by ..."
+               return $count
+                       ? $this->msg( 'othercontribs' )->rawParams(
+                               $lang->listToText( $fulllist ) )->params( $count )->escaped()
+                       : '';
+       }
+
+       /**
+        * Returns the description that goes below the "<h1>" tag.
+        *
+        * @return string
+        */
+       protected function getDescription() {
+               return '';
+       }
+
+       /**
+        * @param WANObjectCache $cache
+        * @param Title $title
+        * @param int $revId
+        * @return string
+        */
+       protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
+               return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
+       }
+}