includes/actions/InfoAction.php

   1 <?php
   2 /**
   3  * Displays information about a page.
   4  *
   5  * Copyright © 2011 Alexandre Emsenhuber
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  * @file
  22  * @ingroup Actions
  23  */
  24
  25 use MediaWiki\MediaWikiServices;
  26 use Wikimedia\Rdbms\Database;
  27
  28 /**
  29  * Displays information about a page.
  30  *
  31  * @ingroup Actions
  32  */
  33 class InfoAction extends FormlessAction {
  34         const VERSION = 1;
  35
  36         /**
  37          * Returns the name of the action this object responds to.
  38          *
  39          * @return string Lowercase name
  40          */
  41         public function getName() {
  42                 return 'info';
  43         }
  44
  45         /**
  46          * Whether this action can still be executed by a blocked user.
  47          *
  48          * @return bool
  49          */
  50         public function requiresUnblock() {
  51                 return false;
  52         }
  53
  54         /**
  55          * Whether this action requires the wiki not to be locked.
  56          *
  57          * @return bool
  58          */
  59         public function requiresWrite() {
  60                 return false;
  61         }
  62
  63         /**
  64          * Clear the info cache for a given Title.
  65          *
  66          * @since 1.22
  67          * @param Title $title Title to clear cache for
  68          * @param int|null $revid Revision id to clear
  69          */
  70         public static function invalidateCache( Title $title, $revid = null ) {
  71                 if ( !$revid ) {
  72                         $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
  73                         $revid = $revision ? $revision->getId() : null;
  74                 }
  75                 if ( $revid !== null ) {
  76                         $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
  77                         $key = self::getCacheKey( $cache, $title, $revid );
  78                         $cache->delete( $key );
  79                 }
  80         }
  81
  82         /**
  83          * Shows page information on GET request.
  84          *
  85          * @return string Page information that will be added to the output
  86          */
  87         public function onView() {
  88                 $content = '';
  89
  90                 // Validate revision
  91                 $oldid = $this->page->getOldID();
  92                 if ( $oldid ) {
  93                         $revision = $this->page->getRevisionFetched();
  94
  95                         // Revision is missing
  96                         if ( $revision === null ) {
  97                                 return $this->msg( 'missing-revision', $oldid )->parse();
  98                         }
  99
 100                         // Revision is not current
 101                         if ( !$revision->isCurrent() ) {
 102                                 return $this->msg( 'pageinfo-not-current' )->plain();
 103                         }
 104                 }
 105
 106                 // Page header
 107                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 108                         $content .= $this->msg( 'pageinfo-header' )->parse();
 109                 }
 110
 111                 // Hide "This page is a member of # hidden categories" explanation
 112                 $content .= Html::element( 'style', [],
 113                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 114
 115                 // Hide "Templates used on this page" explanation
 116                 $content .= Html::element( 'style', [],
 117                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 118
 119                 // Get page information
 120                 $pageInfo = $this->pageInfo();
 121
 122                 // Allow extensions to add additional information
 123                 Hooks::run( 'InfoAction', [ $this->getContext(), &$pageInfo ] );
 124
 125                 // Render page information
 126                 foreach ( $pageInfo as $header => $infoTable ) {
 127                         // Messages:
 128                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 129                         // pageinfo-header-properties, pageinfo-category-info
 130                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 131                         $table = "\n";
 132                         foreach ( $infoTable as $infoRow ) {
 133                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 134                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 135                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 136                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 137                         }
 138                         $content = $this->addTable( $content, $table ) . "\n";
 139                 }
 140
 141                 // Page footer
 142                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 143                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 144                 }
 145
 146                 return $content;
 147         }
 148
 149         /**
 150          * Creates a header that can be added to the output.
 151          *
 152          * @param string $header The header text.
 153          * @return string The HTML.
 154          */
 155         protected function makeHeader( $header ) {
 156                 $spanAttribs = [ 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) ];
 157
 158                 return Html::rawElement( 'h2', [], Html::element( 'span', $spanAttribs, $header ) );
 159         }
 160
 161         /**
 162          * Adds a row to a table that will be added to the content.
 163          *
 164          * @param string $table The table that will be added to the content
 165          * @param string $name The name of the row
 166          * @param string $value The value of the row
 167          * @param string $id The ID to use for the 'tr' element
 168          * @return string The table with the row added
 169          */
 170         protected function addRow( $table, $name, $value, $id ) {
 171                 return $table .
 172                         Html::rawElement(
 173                                 'tr',
 174                                 $id === null ? [] : [ 'id' => 'mw-' . $id ],
 175                                 Html::rawElement( 'td', [ 'style' => 'vertical-align: top;' ], $name ) .
 176                                         Html::rawElement( 'td', [], $value )
 177                         );
 178         }
 179
 180         /**
 181          * Adds a table to the content that will be added to the output.
 182          *
 183          * @param string $content The content that will be added to the output
 184          * @param string $table The table
 185          * @return string The content with the table added
 186          */
 187         protected function addTable( $content, $table ) {
 188                 return $content . Html::rawElement( 'table', [ 'class' => 'wikitable mw-page-info' ],
 189                         $table );
 190         }
 191
 192         /**
 193          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 194          * may add additional information in arbitrary positions. Array values are arrays with one
 195          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 196          *
 197          * @return array
 198          */
 199         protected function pageInfo() {
 200                 global $wgContLang;
 201
 202                 $user = $this->getUser();
 203                 $lang = $this->getLanguage();
 204                 $title = $this->getTitle();
 205                 $id = $title->getArticleID();
 206                 $config = $this->context->getConfig();
 207                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 208
 209                 $pageCounts = $this->pageCounts( $this->page );
 210
 211                 $pageProperties = [];
 212                 $props = PageProps::getInstance()->getAllProperties( $title );
 213                 if ( isset( $props[$id] ) ) {
 214                         $pageProperties = $props[$id];
 215                 }
 216
 217                 // Basic information
 218                 $pageInfo = [];
 219                 $pageInfo['header-basic'] = [];
 220
 221                 // Display title
 222                 $displayTitle = $title->getPrefixedText();
 223                 if ( isset( $pageProperties['displaytitle'] ) ) {
 224                         $displayTitle = $pageProperties['displaytitle'];
 225                 }
 226
 227                 $pageInfo['header-basic'][] = [
 228                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 229                 ];
 230
 231                 // Is it a redirect? If so, where to?
 232                 if ( $title->isRedirect() ) {
 233                         $pageInfo['header-basic'][] = [
 234                                 $this->msg( 'pageinfo-redirectsto' ),
 235                                 $linkRenderer->makeLink( $this->page->getRedirectTarget() ) .
 236                                 $this->msg( 'word-separator' )->escaped() .
 237                                 $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 238                                         $this->page->getRedirectTarget(),
 239                                         $this->msg( 'pageinfo-redirectsto-info' )->text(),
 240                                         [],
 241                                         [ 'action' => 'info' ]
 242                                 ) )->escaped()
 243                         ];
 244                 }
 245
 246                 // Default sort key
 247                 $sortKey = $title->getCategorySortkey();
 248                 if ( isset( $pageProperties['defaultsort'] ) ) {
 249                         $sortKey = $pageProperties['defaultsort'];
 250                 }
 251
 252                 $sortKey = htmlspecialchars( $sortKey );
 253                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-default-sort' ), $sortKey ];
 254
 255                 // Page length (in bytes)
 256                 $pageInfo['header-basic'][] = [
 257                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 258                 ];
 259
 260                 // Page ID (number not localised, as it's a database ID)
 261                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-article-id' ), $id ];
 262
 263                 // Language in which the page content is (supposed to be) written
 264                 $pageLang = $title->getPageLanguage()->getCode();
 265
 266                 $pageLangHtml = $pageLang . ' - ' .
 267                         Language::fetchLanguageName( $pageLang, $lang->getCode() );
 268                 // Link to Special:PageLanguage with pre-filled page title if user has permissions
 269                 if ( $config->get( 'PageLanguageUseDB' )
 270                         && $title->userCan( 'pagelang', $user )
 271                 ) {
 272                         $pageLangHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 273                                 SpecialPage::getTitleValueFor( 'PageLanguage', $title->getPrefixedText() ),
 274                                 $this->msg( 'pageinfo-language-change' )->text()
 275                         ) )->escaped();
 276                 }
 277
 278                 $pageInfo['header-basic'][] = [
 279                         $this->msg( 'pageinfo-language' )->escaped(),
 280                         $pageLangHtml
 281                 ];
 282
 283                 // Content model of the page
 284                 $modelHtml = htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) );
 285                 // If the user can change it, add a link to Special:ChangeContentModel
 286                 if ( $config->get( 'ContentHandlerUseDB' )
 287                         && $title->userCan( 'editcontentmodel', $user )
 288                 ) {
 289                         $modelHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 290                                 SpecialPage::getTitleValueFor( 'ChangeContentModel', $title->getPrefixedText() ),
 291                                 $this->msg( 'pageinfo-content-model-change' )->text()
 292                         ) )->escaped();
 293                 }
 294
 295                 $pageInfo['header-basic'][] = [
 296                         $this->msg( 'pageinfo-content-model' ),
 297                         $modelHtml
 298                 ];
 299
 300                 if ( $title->inNamespace( NS_USER ) ) {
 301                         $pageUser = User::newFromName( $title->getRootText() );
 302                         if ( $pageUser && $pageUser->getId() && !$pageUser->isHidden() ) {
 303                                 $pageInfo['header-basic'][] = [
 304                                         $this->msg( 'pageinfo-user-id' ),
 305                                         $pageUser->getId()
 306                                 ];
 307                         }
 308                 }
 309
 310                 // Search engine status
 311                 $pOutput = new ParserOutput();
 312                 if ( isset( $pageProperties['noindex'] ) ) {
 313                         $pOutput->setIndexPolicy( 'noindex' );
 314                 }
 315                 if ( isset( $pageProperties['index'] ) ) {
 316                         $pOutput->setIndexPolicy( 'index' );
 317                 }
 318
 319                 // Use robot policy logic
 320                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 321                 $pageInfo['header-basic'][] = [
 322                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 323                         $this->msg( 'pageinfo-robot-policy' ),
 324                         $this->msg( "pageinfo-robot-${policy['index']}" )
 325                 ];
 326
 327                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 328                 if (
 329                         $user->isAllowed( 'unwatchedpages' ) ||
 330                         ( $unwatchedPageThreshold !== false &&
 331                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 332                 ) {
 333                         // Number of page watchers
 334                         $pageInfo['header-basic'][] = [
 335                                 $this->msg( 'pageinfo-watchers' ),
 336                                 $lang->formatNum( $pageCounts['watchers'] )
 337                         ];
 338                         if (
 339                                 $config->get( 'ShowUpdatedMarker' ) &&
 340                                 isset( $pageCounts['visitingWatchers'] )
 341                         ) {
 342                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 343                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 344                                         $user->isAllowed( 'unwatchedpages' ) ) {
 345                                         $pageInfo['header-basic'][] = [
 346                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 347                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 348                                         ];
 349                                 } else {
 350                                         $pageInfo['header-basic'][] = [
 351                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 352                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 353                                         ];
 354                                 }
 355                         }
 356                 } elseif ( $unwatchedPageThreshold !== false ) {
 357                         $pageInfo['header-basic'][] = [
 358                                 $this->msg( 'pageinfo-watchers' ),
 359                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 360                         ];
 361                 }
 362
 363                 // Redirects to this page
 364                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 365                 $pageInfo['header-basic'][] = [
 366                         $linkRenderer->makeLink(
 367                                 $whatLinksHere,
 368                                 $this->msg( 'pageinfo-redirects-name' )->text(),
 369                                 [],
 370                                 [
 371                                         'hidelinks' => 1,
 372                                         'hidetrans' => 1,
 373                                         'hideimages' => $title->getNamespace() == NS_FILE
 374                                 ]
 375                         ),
 376                         $this->msg( 'pageinfo-redirects-value' )
 377                                 ->numParams( count( $title->getRedirectsHere() ) )
 378                 ];
 379
 380                 // Is it counted as a content page?
 381                 if ( $this->page->isCountable() ) {
 382                         $pageInfo['header-basic'][] = [
 383                                 $this->msg( 'pageinfo-contentpage' ),
 384                                 $this->msg( 'pageinfo-contentpage-yes' )
 385                         ];
 386                 }
 387
 388                 // Subpages of this page, if subpages are enabled for the current NS
 389                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 390                         $prefixIndex = SpecialPage::getTitleFor(
 391                                 'Prefixindex', $title->getPrefixedText() . '/' );
 392                         $pageInfo['header-basic'][] = [
 393                                 $linkRenderer->makeLink(
 394                                         $prefixIndex,
 395                                         $this->msg( 'pageinfo-subpages-name' )->text()
 396                                 ),
 397                                 $this->msg( 'pageinfo-subpages-value' )
 398                                         ->numParams(
 399                                                 $pageCounts['subpages']['total'],
 400                                                 $pageCounts['subpages']['redirects'],
 401                                                 $pageCounts['subpages']['nonredirects'] )
 402                         ];
 403                 }
 404
 405                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 406                         $category = Category::newFromTitle( $title );
 407
 408                         // $allCount is the total number of cat members,
 409                         // not the count of how many members are normal pages.
 410                         $allCount = (int)$category->getPageCount();
 411                         $subcatCount = (int)$category->getSubcatCount();
 412                         $fileCount = (int)$category->getFileCount();
 413                         $pagesCount = $allCount - $subcatCount - $fileCount;
 414
 415                         $pageInfo['category-info'] = [
 416                                 [
 417                                         $this->msg( 'pageinfo-category-total' ),
 418                                         $lang->formatNum( $allCount )
 419                                 ],
 420                                 [
 421                                         $this->msg( 'pageinfo-category-pages' ),
 422                                         $lang->formatNum( $pagesCount )
 423                                 ],
 424                                 [
 425                                         $this->msg( 'pageinfo-category-subcats' ),
 426                                         $lang->formatNum( $subcatCount )
 427                                 ],
 428                                 [
 429                                         $this->msg( 'pageinfo-category-files' ),
 430                                         $lang->formatNum( $fileCount )
 431                                 ]
 432                         ];
 433                 }
 434
 435                 // Page protection
 436                 $pageInfo['header-restrictions'] = [];
 437
 438                 // Is this page affected by the cascading protection of something which includes it?
 439                 if ( $title->isCascadeProtected() ) {
 440                         $cascadingFrom = '';
 441                         $sources = $title->getCascadeProtectionSources()[0];
 442
 443                         foreach ( $sources as $sourceTitle ) {
 444                                 $cascadingFrom .= Html::rawElement(
 445                                         'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
 446                         }
 447
 448                         $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
 449                         $pageInfo['header-restrictions'][] = [
 450                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 451                                 $cascadingFrom
 452                         ];
 453                 }
 454
 455                 // Is out protection set to cascade to other pages?
 456                 if ( $title->areRestrictionsCascading() ) {
 457                         $pageInfo['header-restrictions'][] = [
 458                                 $this->msg( 'pageinfo-protect-cascading' ),
 459                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 460                         ];
 461                 }
 462
 463                 // Page protection
 464                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 465                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 466
 467                         if ( $protectionLevel == '' ) {
 468                                 // Allow all users
 469                                 $message = $this->msg( 'protect-default' )->escaped();
 470                         } else {
 471                                 // Administrators only
 472                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 473                                 $message = $this->msg( "protect-level-$protectionLevel" );
 474                                 if ( $message->isDisabled() ) {
 475                                         // Require "$1" permission
 476                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 477                                 } else {
 478                                         $message = $message->escaped();
 479                                 }
 480                         }
 481                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 482                         $formattedexpiry = $this->msg( 'parentheses',
 483                                 $lang->formatExpiry( $expiry ) )->escaped();
 484                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 485
 486                         // Messages: restriction-edit, restriction-move, restriction-create,
 487                         // restriction-upload
 488                         $pageInfo['header-restrictions'][] = [
 489                                 $this->msg( "restriction-$restrictionType" ), $message
 490                         ];
 491                 }
 492
 493                 if ( !$this->page->exists() ) {
 494                         return $pageInfo;
 495                 }
 496
 497                 // Edit history
 498                 $pageInfo['header-edits'] = [];
 499
 500                 $firstRev = $this->page->getOldestRevision();
 501                 $lastRev = $this->page->getRevision();
 502                 $batch = new LinkBatch;
 503
 504                 if ( $firstRev ) {
 505                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 506                         if ( $firstRevUser !== '' ) {
 507                                 $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
 508                                 $batch->addObj( $firstRevUserTitle );
 509                                 $batch->addObj( $firstRevUserTitle->getTalkPage() );
 510                         }
 511                 }
 512
 513                 if ( $lastRev ) {
 514                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 515                         if ( $lastRevUser !== '' ) {
 516                                 $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
 517                                 $batch->addObj( $lastRevUserTitle );
 518                                 $batch->addObj( $lastRevUserTitle->getTalkPage() );
 519                         }
 520                 }
 521
 522                 $batch->execute();
 523
 524                 if ( $firstRev ) {
 525                         // Page creator
 526                         $pageInfo['header-edits'][] = [
 527                                 $this->msg( 'pageinfo-firstuser' ),
 528                                 Linker::revUserTools( $firstRev )
 529                         ];
 530
 531                         // Date of page creation
 532                         $pageInfo['header-edits'][] = [
 533                                 $this->msg( 'pageinfo-firsttime' ),
 534                                 $linkRenderer->makeKnownLink(
 535                                         $title,
 536                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 537                                         [],
 538                                         [ 'oldid' => $firstRev->getId() ]
 539                                 )
 540                         ];
 541                 }
 542
 543                 if ( $lastRev ) {
 544                         // Latest editor
 545                         $pageInfo['header-edits'][] = [
 546                                 $this->msg( 'pageinfo-lastuser' ),
 547                                 Linker::revUserTools( $lastRev )
 548                         ];
 549
 550                         // Date of latest edit
 551                         $pageInfo['header-edits'][] = [
 552                                 $this->msg( 'pageinfo-lasttime' ),
 553                                 $linkRenderer->makeKnownLink(
 554                                         $title,
 555                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 556                                         [],
 557                                         [ 'oldid' => $this->page->getLatest() ]
 558                                 )
 559                         ];
 560                 }
 561
 562                 // Total number of edits
 563                 $pageInfo['header-edits'][] = [
 564                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 565                 ];
 566
 567                 // Total number of distinct authors
 568                 if ( $pageCounts['authors'] > 0 ) {
 569                         $pageInfo['header-edits'][] = [
 570                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 571                         ];
 572                 }
 573
 574                 // Recent number of edits (within past 30 days)
 575                 $pageInfo['header-edits'][] = [
 576                         $this->msg( 'pageinfo-recent-edits',
 577                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 578                         $lang->formatNum( $pageCounts['recent_edits'] )
 579                 ];
 580
 581                 // Recent number of distinct authors
 582                 $pageInfo['header-edits'][] = [
 583                         $this->msg( 'pageinfo-recent-authors' ),
 584                         $lang->formatNum( $pageCounts['recent_authors'] )
 585                 ];
 586
 587                 // Array of MagicWord objects
 588                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 589
 590                 // Array of magic word IDs
 591                 $wordIDs = $magicWords->names;
 592
 593                 // Array of IDs => localized magic words
 594                 $localizedWords = $wgContLang->getMagicWords();
 595
 596                 $listItems = [];
 597                 foreach ( $pageProperties as $property => $value ) {
 598                         if ( in_array( $property, $wordIDs ) ) {
 599                                 $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
 600                         }
 601                 }
 602
 603                 $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
 604                 $hiddenCategories = $this->page->getHiddenCategories();
 605
 606                 if (
 607                         count( $listItems ) > 0 ||
 608                         count( $hiddenCategories ) > 0 ||
 609                         $pageCounts['transclusion']['from'] > 0 ||
 610                         $pageCounts['transclusion']['to'] > 0
 611                 ) {
 612                         $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
 613                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 614                         if ( $config->get( 'MiserMode' ) ) {
 615                                 $transcludedTargets = [];
 616                         } else {
 617                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 618                         }
 619
 620                         // Page properties
 621                         $pageInfo['header-properties'] = [];
 622
 623                         // Magic words
 624                         if ( count( $listItems ) > 0 ) {
 625                                 $pageInfo['header-properties'][] = [
 626                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 627                                         $localizedList
 628                                 ];
 629                         }
 630
 631                         // Hidden categories
 632                         if ( count( $hiddenCategories ) > 0 ) {
 633                                 $pageInfo['header-properties'][] = [
 634                                         $this->msg( 'pageinfo-hidden-categories' )
 635                                                 ->numParams( count( $hiddenCategories ) ),
 636                                         Linker::formatHiddenCategories( $hiddenCategories )
 637                                 ];
 638                         }
 639
 640                         // Transcluded templates
 641                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 642                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 643                                         $more = $this->msg( 'morenotlisted' )->escaped();
 644                                 } else {
 645                                         $more = null;
 646                                 }
 647
 648                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 649                                         $this->getContext(),
 650                                         $linkRenderer
 651                                 );
 652
 653                                 $pageInfo['header-properties'][] = [
 654                                         $this->msg( 'pageinfo-templates' )
 655                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 656                                         $templateListFormatter->format( $transcludedTemplates, false, $more )
 657                                 ];
 658                         }
 659
 660                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 661                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 662                                         $more = $linkRenderer->makeLink(
 663                                                 $whatLinksHere,
 664                                                 $this->msg( 'moredotdotdot' )->text(),
 665                                                 [],
 666                                                 [ 'hidelinks' => 1, 'hideredirs' => 1 ]
 667                                         );
 668                                 } else {
 669                                         $more = null;
 670                                 }
 671
 672                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 673                                         $this->getContext(),
 674                                         $linkRenderer
 675                                 );
 676
 677                                 $pageInfo['header-properties'][] = [
 678                                         $this->msg( 'pageinfo-transclusions' )
 679                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 680                                         $templateListFormatter->format( $transcludedTargets, false, $more )
 681                                 ];
 682                         }
 683                 }
 684
 685                 return $pageInfo;
 686         }
 687
 688         /**
 689          * Returns page counts that would be too "expensive" to retrieve by normal means.
 690          *
 691          * @param WikiPage|Article|Page $page
 692          * @return array
 693          */
 694         protected function pageCounts( Page $page ) {
 695                 $fname = __METHOD__;
 696                 $config = $this->context->getConfig();
 697                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 698
 699                 return $cache->getWithSetCallback(
 700                         self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
 701                         WANObjectCache::TTL_WEEK,
 702                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname ) {
 703                                 $title = $page->getTitle();
 704                                 $id = $title->getArticleID();
 705
 706                                 $dbr = wfGetDB( DB_REPLICA );
 707                                 $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
 708                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 709
 710                                 $watchedItemStore = MediaWikiServices::getInstance()->getWatchedItemStore();
 711
 712                                 $result = [];
 713                                 $result['watchers'] = $watchedItemStore->countWatchers( $title );
 714
 715                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 716                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 717                                         $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
 718                                                 $title,
 719                                                 $updated - $config->get( 'WatchersMaxAge' )
 720                                         );
 721                                 }
 722
 723                                 // Total number of edits
 724                                 $edits = (int)$dbr->selectField(
 725                                         'revision',
 726                                         'COUNT(*)',
 727                                         [ 'rev_page' => $id ],
 728                                         $fname
 729                                 );
 730                                 $result['edits'] = $edits;
 731
 732                                 // Total number of distinct authors
 733                                 if ( $config->get( 'MiserMode' ) ) {
 734                                         $result['authors'] = 0;
 735                                 } else {
 736                                         $result['authors'] = (int)$dbr->selectField(
 737                                                 'revision',
 738                                                 'COUNT(DISTINCT rev_user_text)',
 739                                                 [ 'rev_page' => $id ],
 740                                                 $fname
 741                                         );
 742                                 }
 743
 744                                 // "Recent" threshold defined by RCMaxAge setting
 745                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 746
 747                                 // Recent number of edits
 748                                 $edits = (int)$dbr->selectField(
 749                                         'revision',
 750                                         'COUNT(rev_page)',
 751                                         [
 752                                                 'rev_page' => $id,
 753                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 754                                         ],
 755                                         $fname
 756                                 );
 757                                 $result['recent_edits'] = $edits;
 758
 759                                 // Recent number of distinct authors
 760                                 $result['recent_authors'] = (int)$dbr->selectField(
 761                                         'revision',
 762                                         'COUNT(DISTINCT rev_user_text)',
 763                                         [
 764                                                 'rev_page' => $id,
 765                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 766                                         ],
 767                                         $fname
 768                                 );
 769
 770                                 // Subpages (if enabled)
 771                                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 772                                         $conds = [ 'page_namespace' => $title->getNamespace() ];
 773                                         $conds[] = 'page_title ' .
 774                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 775
 776                                         // Subpages of this page (redirects)
 777                                         $conds['page_is_redirect'] = 1;
 778                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 779                                                 'page',
 780                                                 'COUNT(page_id)',
 781                                                 $conds,
 782                                                 $fname
 783                                         );
 784
 785                                         // Subpages of this page (non-redirects)
 786                                         $conds['page_is_redirect'] = 0;
 787                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 788                                                 'page',
 789                                                 'COUNT(page_id)',
 790                                                 $conds,
 791                                                 $fname
 792                                         );
 793
 794                                         // Subpages of this page (total)
 795                                         $result['subpages']['total'] = $result['subpages']['redirects']
 796                                                 + $result['subpages']['nonredirects'];
 797                                 }
 798
 799                                 // Counts for the number of transclusion links (to/from)
 800                                 if ( $config->get( 'MiserMode' ) ) {
 801                                         $result['transclusion']['to'] = 0;
 802                                 } else {
 803                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 804                                                 'templatelinks',
 805                                                 'COUNT(tl_from)',
 806                                                 [
 807                                                         'tl_namespace' => $title->getNamespace(),
 808                                                         'tl_title' => $title->getDBkey()
 809                                                 ],
 810                                                 $fname
 811                                         );
 812                                 }
 813
 814                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 815                                         'templatelinks',
 816                                         'COUNT(*)',
 817                                         [ 'tl_from' => $title->getArticleID() ],
 818                                         $fname
 819                                 );
 820
 821                                 return $result;
 822                         }
 823                 );
 824         }
 825
 826         /**
 827          * Returns the name that goes in the "<h1>" page title.
 828          *
 829          * @return string
 830          */
 831         protected function getPageTitle() {
 832                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 833         }
 834
 835         /**
 836          * Get a list of contributors of $article
 837          * @return string Html
 838          */
 839         protected function getContributors() {
 840                 $contributors = $this->page->getContributors();
 841                 $real_names = [];
 842                 $user_names = [];
 843                 $anon_ips = [];
 844                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 845
 846                 # Sift for real versus user names
 847                 /** @var $user User */
 848                 foreach ( $contributors as $user ) {
 849                         $page = $user->isAnon()
 850                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 851                                 : $user->getUserPage();
 852
 853                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 854                         if ( $user->getId() == 0 ) {
 855                                 $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
 856                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 857                                 $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
 858                         } else {
 859                                 $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
 860                         }
 861                 }
 862
 863                 $lang = $this->getLanguage();
 864
 865                 $real = $lang->listToText( $real_names );
 866
 867                 # "ThisSite user(s) A, B and C"
 868                 if ( count( $user_names ) ) {
 869                         $user = $this->msg( 'siteusers' )
 870                                 ->rawParams( $lang->listToText( $user_names ) )
 871                                 ->params( count( $user_names ) )->escaped();
 872                 } else {
 873                         $user = false;
 874                 }
 875
 876                 if ( count( $anon_ips ) ) {
 877                         $anon = $this->msg( 'anonusers' )
 878                                 ->rawParams( $lang->listToText( $anon_ips ) )
 879                                 ->params( count( $anon_ips ) )->escaped();
 880                 } else {
 881                         $anon = false;
 882                 }
 883
 884                 # This is the big list, all mooshed together. We sift for blank strings
 885                 $fulllist = [];
 886                 foreach ( [ $real, $user, $anon ] as $s ) {
 887                         if ( $s !== '' ) {
 888                                 array_push( $fulllist, $s );
 889                         }
 890                 }
 891
 892                 $count = count( $fulllist );
 893
 894                 # "Based on work by ..."
 895                 return $count
 896                         ? $this->msg( 'othercontribs' )->rawParams(
 897                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 898                         : '';
 899         }
 900
 901         /**
 902          * Returns the description that goes below the "<h1>" tag.
 903          *
 904          * @return string
 905          */
 906         protected function getDescription() {
 907                 return '';
 908         }
 909
 910         /**
 911          * @param WANObjectCache $cache
 912          * @param Title $title
 913          * @param int $revId
 914          * @return string
 915          */
 916         protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
 917                 return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 918         }
 919 }