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                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 394                                 $this->msg( 'pageinfo-subpages-value' )
 395                                         ->numParams(
 396                                                 $pageCounts['subpages']['total'],
 397                                                 $pageCounts['subpages']['redirects'],
 398                                                 $pageCounts['subpages']['nonredirects'] )
 399                         ];
 400                 }
 401
 402                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 403                         $category = Category::newFromTitle( $title );
 404
 405                         // $allCount is the total number of cat members,
 406                         // not the count of how many members are normal pages.
 407                         $allCount = (int)$category->getPageCount();
 408                         $subcatCount = (int)$category->getSubcatCount();
 409                         $fileCount = (int)$category->getFileCount();
 410                         $pagesCount = $allCount - $subcatCount - $fileCount;
 411
 412                         $pageInfo['category-info'] = [
 413                                 [
 414                                         $this->msg( 'pageinfo-category-total' ),
 415                                         $lang->formatNum( $allCount )
 416                                 ],
 417                                 [
 418                                         $this->msg( 'pageinfo-category-pages' ),
 419                                         $lang->formatNum( $pagesCount )
 420                                 ],
 421                                 [
 422                                         $this->msg( 'pageinfo-category-subcats' ),
 423                                         $lang->formatNum( $subcatCount )
 424                                 ],
 425                                 [
 426                                         $this->msg( 'pageinfo-category-files' ),
 427                                         $lang->formatNum( $fileCount )
 428                                 ]
 429                         ];
 430                 }
 431
 432                 // Page protection
 433                 $pageInfo['header-restrictions'] = [];
 434
 435                 // Is this page affected by the cascading protection of something which includes it?
 436                 if ( $title->isCascadeProtected() ) {
 437                         $cascadingFrom = '';
 438                         $sources = $title->getCascadeProtectionSources()[0];
 439
 440                         foreach ( $sources as $sourceTitle ) {
 441                                 $cascadingFrom .= Html::rawElement(
 442                                         'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
 443                         }
 444
 445                         $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
 446                         $pageInfo['header-restrictions'][] = [
 447                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 448                                 $cascadingFrom
 449                         ];
 450                 }
 451
 452                 // Is out protection set to cascade to other pages?
 453                 if ( $title->areRestrictionsCascading() ) {
 454                         $pageInfo['header-restrictions'][] = [
 455                                 $this->msg( 'pageinfo-protect-cascading' ),
 456                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 457                         ];
 458                 }
 459
 460                 // Page protection
 461                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 462                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 463
 464                         if ( $protectionLevel == '' ) {
 465                                 // Allow all users
 466                                 $message = $this->msg( 'protect-default' )->escaped();
 467                         } else {
 468                                 // Administrators only
 469                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 470                                 $message = $this->msg( "protect-level-$protectionLevel" );
 471                                 if ( $message->isDisabled() ) {
 472                                         // Require "$1" permission
 473                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 474                                 } else {
 475                                         $message = $message->escaped();
 476                                 }
 477                         }
 478                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 479                         $formattedexpiry = $this->msg( 'parentheses',
 480                                 $lang->formatExpiry( $expiry ) )->escaped();
 481                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 482
 483                         // Messages: restriction-edit, restriction-move, restriction-create,
 484                         // restriction-upload
 485                         $pageInfo['header-restrictions'][] = [
 486                                 $this->msg( "restriction-$restrictionType" ), $message
 487                         ];
 488                 }
 489
 490                 if ( !$this->page->exists() ) {
 491                         return $pageInfo;
 492                 }
 493
 494                 // Edit history
 495                 $pageInfo['header-edits'] = [];
 496
 497                 $firstRev = $this->page->getOldestRevision();
 498                 $lastRev = $this->page->getRevision();
 499                 $batch = new LinkBatch;
 500
 501                 if ( $firstRev ) {
 502                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 503                         if ( $firstRevUser !== '' ) {
 504                                 $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
 505                                 $batch->addObj( $firstRevUserTitle );
 506                                 $batch->addObj( $firstRevUserTitle->getTalkPage() );
 507                         }
 508                 }
 509
 510                 if ( $lastRev ) {
 511                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 512                         if ( $lastRevUser !== '' ) {
 513                                 $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
 514                                 $batch->addObj( $lastRevUserTitle );
 515                                 $batch->addObj( $lastRevUserTitle->getTalkPage() );
 516                         }
 517                 }
 518
 519                 $batch->execute();
 520
 521                 if ( $firstRev ) {
 522                         // Page creator
 523                         $pageInfo['header-edits'][] = [
 524                                 $this->msg( 'pageinfo-firstuser' ),
 525                                 Linker::revUserTools( $firstRev )
 526                         ];
 527
 528                         // Date of page creation
 529                         $pageInfo['header-edits'][] = [
 530                                 $this->msg( 'pageinfo-firsttime' ),
 531                                 $linkRenderer->makeKnownLink(
 532                                         $title,
 533                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 534                                         [],
 535                                         [ 'oldid' => $firstRev->getId() ]
 536                                 )
 537                         ];
 538                 }
 539
 540                 if ( $lastRev ) {
 541                         // Latest editor
 542                         $pageInfo['header-edits'][] = [
 543                                 $this->msg( 'pageinfo-lastuser' ),
 544                                 Linker::revUserTools( $lastRev )
 545                         ];
 546
 547                         // Date of latest edit
 548                         $pageInfo['header-edits'][] = [
 549                                 $this->msg( 'pageinfo-lasttime' ),
 550                                 $linkRenderer->makeKnownLink(
 551                                         $title,
 552                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 553                                         [],
 554                                         [ 'oldid' => $this->page->getLatest() ]
 555                                 )
 556                         ];
 557                 }
 558
 559                 // Total number of edits
 560                 $pageInfo['header-edits'][] = [
 561                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 562                 ];
 563
 564                 // Total number of distinct authors
 565                 if ( $pageCounts['authors'] > 0 ) {
 566                         $pageInfo['header-edits'][] = [
 567                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 568                         ];
 569                 }
 570
 571                 // Recent number of edits (within past 30 days)
 572                 $pageInfo['header-edits'][] = [
 573                         $this->msg( 'pageinfo-recent-edits',
 574                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 575                         $lang->formatNum( $pageCounts['recent_edits'] )
 576                 ];
 577
 578                 // Recent number of distinct authors
 579                 $pageInfo['header-edits'][] = [
 580                         $this->msg( 'pageinfo-recent-authors' ),
 581                         $lang->formatNum( $pageCounts['recent_authors'] )
 582                 ];
 583
 584                 // Array of MagicWord objects
 585                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 586
 587                 // Array of magic word IDs
 588                 $wordIDs = $magicWords->names;
 589
 590                 // Array of IDs => localized magic words
 591                 $localizedWords = $wgContLang->getMagicWords();
 592
 593                 $listItems = [];
 594                 foreach ( $pageProperties as $property => $value ) {
 595                         if ( in_array( $property, $wordIDs ) ) {
 596                                 $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
 597                         }
 598                 }
 599
 600                 $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
 601                 $hiddenCategories = $this->page->getHiddenCategories();
 602
 603                 if (
 604                         count( $listItems ) > 0 ||
 605                         count( $hiddenCategories ) > 0 ||
 606                         $pageCounts['transclusion']['from'] > 0 ||
 607                         $pageCounts['transclusion']['to'] > 0
 608                 ) {
 609                         $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
 610                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 611                         if ( $config->get( 'MiserMode' ) ) {
 612                                 $transcludedTargets = [];
 613                         } else {
 614                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 615                         }
 616
 617                         // Page properties
 618                         $pageInfo['header-properties'] = [];
 619
 620                         // Magic words
 621                         if ( count( $listItems ) > 0 ) {
 622                                 $pageInfo['header-properties'][] = [
 623                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 624                                         $localizedList
 625                                 ];
 626                         }
 627
 628                         // Hidden categories
 629                         if ( count( $hiddenCategories ) > 0 ) {
 630                                 $pageInfo['header-properties'][] = [
 631                                         $this->msg( 'pageinfo-hidden-categories' )
 632                                                 ->numParams( count( $hiddenCategories ) ),
 633                                         Linker::formatHiddenCategories( $hiddenCategories )
 634                                 ];
 635                         }
 636
 637                         // Transcluded templates
 638                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 639                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 640                                         $more = $this->msg( 'morenotlisted' )->escaped();
 641                                 } else {
 642                                         $more = null;
 643                                 }
 644
 645                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 646                                         $this->getContext(),
 647                                         $linkRenderer
 648                                 );
 649
 650                                 $pageInfo['header-properties'][] = [
 651                                         $this->msg( 'pageinfo-templates' )
 652                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 653                                         $templateListFormatter->format( $transcludedTemplates, false, $more )
 654                                 ];
 655                         }
 656
 657                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 658                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 659                                         $more = $linkRenderer->makeLink(
 660                                                 $whatLinksHere,
 661                                                 $this->msg( 'moredotdotdot' )->text(),
 662                                                 [],
 663                                                 [ 'hidelinks' => 1, 'hideredirs' => 1 ]
 664                                         );
 665                                 } else {
 666                                         $more = null;
 667                                 }
 668
 669                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 670                                         $this->getContext(),
 671                                         $linkRenderer
 672                                 );
 673
 674                                 $pageInfo['header-properties'][] = [
 675                                         $this->msg( 'pageinfo-transclusions' )
 676                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 677                                         $templateListFormatter->format( $transcludedTargets, false, $more )
 678                                 ];
 679                         }
 680                 }
 681
 682                 return $pageInfo;
 683         }
 684
 685         /**
 686          * Returns page counts that would be too "expensive" to retrieve by normal means.
 687          *
 688          * @param WikiPage|Article|Page $page
 689          * @return array
 690          */
 691         protected function pageCounts( Page $page ) {
 692                 $fname = __METHOD__;
 693                 $config = $this->context->getConfig();
 694                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 695
 696                 return $cache->getWithSetCallback(
 697                         self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
 698                         WANObjectCache::TTL_WEEK,
 699                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname ) {
 700                                 $title = $page->getTitle();
 701                                 $id = $title->getArticleID();
 702
 703                                 $dbr = wfGetDB( DB_REPLICA );
 704                                 $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
 705                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 706
 707                                 $watchedItemStore = MediaWikiServices::getInstance()->getWatchedItemStore();
 708
 709                                 $result = [];
 710                                 $result['watchers'] = $watchedItemStore->countWatchers( $title );
 711
 712                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 713                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 714                                         $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
 715                                                 $title,
 716                                                 $updated - $config->get( 'WatchersMaxAge' )
 717                                         );
 718                                 }
 719
 720                                 // Total number of edits
 721                                 $edits = (int)$dbr->selectField(
 722                                         'revision',
 723                                         'COUNT(*)',
 724                                         [ 'rev_page' => $id ],
 725                                         $fname
 726                                 );
 727                                 $result['edits'] = $edits;
 728
 729                                 // Total number of distinct authors
 730                                 if ( $config->get( 'MiserMode' ) ) {
 731                                         $result['authors'] = 0;
 732                                 } else {
 733                                         $result['authors'] = (int)$dbr->selectField(
 734                                                 'revision',
 735                                                 'COUNT(DISTINCT rev_user_text)',
 736                                                 [ 'rev_page' => $id ],
 737                                                 $fname
 738                                         );
 739                                 }
 740
 741                                 // "Recent" threshold defined by RCMaxAge setting
 742                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 743
 744                                 // Recent number of edits
 745                                 $edits = (int)$dbr->selectField(
 746                                         'revision',
 747                                         'COUNT(rev_page)',
 748                                         [
 749                                                 'rev_page' => $id,
 750                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 751                                         ],
 752                                         $fname
 753                                 );
 754                                 $result['recent_edits'] = $edits;
 755
 756                                 // Recent number of distinct authors
 757                                 $result['recent_authors'] = (int)$dbr->selectField(
 758                                         'revision',
 759                                         'COUNT(DISTINCT rev_user_text)',
 760                                         [
 761                                                 'rev_page' => $id,
 762                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 763                                         ],
 764                                         $fname
 765                                 );
 766
 767                                 // Subpages (if enabled)
 768                                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 769                                         $conds = [ 'page_namespace' => $title->getNamespace() ];
 770                                         $conds[] = 'page_title ' .
 771                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 772
 773                                         // Subpages of this page (redirects)
 774                                         $conds['page_is_redirect'] = 1;
 775                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 776                                                 'page',
 777                                                 'COUNT(page_id)',
 778                                                 $conds,
 779                                                 $fname
 780                                         );
 781
 782                                         // Subpages of this page (non-redirects)
 783                                         $conds['page_is_redirect'] = 0;
 784                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 785                                                 'page',
 786                                                 'COUNT(page_id)',
 787                                                 $conds,
 788                                                 $fname
 789                                         );
 790
 791                                         // Subpages of this page (total)
 792                                         $result['subpages']['total'] = $result['subpages']['redirects']
 793                                                 + $result['subpages']['nonredirects'];
 794                                 }
 795
 796                                 // Counts for the number of transclusion links (to/from)
 797                                 if ( $config->get( 'MiserMode' ) ) {
 798                                         $result['transclusion']['to'] = 0;
 799                                 } else {
 800                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 801                                                 'templatelinks',
 802                                                 'COUNT(tl_from)',
 803                                                 [
 804                                                         'tl_namespace' => $title->getNamespace(),
 805                                                         'tl_title' => $title->getDBkey()
 806                                                 ],
 807                                                 $fname
 808                                         );
 809                                 }
 810
 811                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 812                                         'templatelinks',
 813                                         'COUNT(*)',
 814                                         [ 'tl_from' => $title->getArticleID() ],
 815                                         $fname
 816                                 );
 817
 818                                 return $result;
 819                         }
 820                 );
 821         }
 822
 823         /**
 824          * Returns the name that goes in the "<h1>" page title.
 825          *
 826          * @return string
 827          */
 828         protected function getPageTitle() {
 829                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 830         }
 831
 832         /**
 833          * Get a list of contributors of $article
 834          * @return string Html
 835          */
 836         protected function getContributors() {
 837                 $contributors = $this->page->getContributors();
 838                 $real_names = [];
 839                 $user_names = [];
 840                 $anon_ips = [];
 841                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 842
 843                 # Sift for real versus user names
 844                 /** @var $user User */
 845                 foreach ( $contributors as $user ) {
 846                         $page = $user->isAnon()
 847                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 848                                 : $user->getUserPage();
 849
 850                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 851                         if ( $user->getId() == 0 ) {
 852                                 $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
 853                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 854                                 $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
 855                         } else {
 856                                 $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
 857                         }
 858                 }
 859
 860                 $lang = $this->getLanguage();
 861
 862                 $real = $lang->listToText( $real_names );
 863
 864                 # "ThisSite user(s) A, B and C"
 865                 if ( count( $user_names ) ) {
 866                         $user = $this->msg( 'siteusers' )
 867                                 ->rawParams( $lang->listToText( $user_names ) )
 868                                 ->params( count( $user_names ) )->escaped();
 869                 } else {
 870                         $user = false;
 871                 }
 872
 873                 if ( count( $anon_ips ) ) {
 874                         $anon = $this->msg( 'anonusers' )
 875                                 ->rawParams( $lang->listToText( $anon_ips ) )
 876                                 ->params( count( $anon_ips ) )->escaped();
 877                 } else {
 878                         $anon = false;
 879                 }
 880
 881                 # This is the big list, all mooshed together. We sift for blank strings
 882                 $fulllist = [];
 883                 foreach ( [ $real, $user, $anon ] as $s ) {
 884                         if ( $s !== '' ) {
 885                                 array_push( $fulllist, $s );
 886                         }
 887                 }
 888
 889                 $count = count( $fulllist );
 890
 891                 # "Based on work by ..."
 892                 return $count
 893                         ? $this->msg( 'othercontribs' )->rawParams(
 894                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 895                         : '';
 896         }
 897
 898         /**
 899          * Returns the description that goes below the "<h1>" tag.
 900          *
 901          * @return string
 902          */
 903         protected function getDescription() {
 904                 return '';
 905         }
 906
 907         /**
 908          * @param WANObjectCache $cache
 909          * @param Title $title
 910          * @param int $revId
 911          * @return string
 912          */
 913         protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
 914                 return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 915         }
 916 }