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