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(
 131                                 $this->msg( "pageinfo-${header}" )->text(),
 132                                 "mw-pageinfo-${header}"
 133                         ) . "\n";
 134                         $table = "\n";
 135                         foreach ( $infoTable as $infoRow ) {
 136                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 137                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 138                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 139                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 140                         }
 141                         $content = $this->addTable( $content, $table ) . "\n";
 142                 }
 143
 144                 // Page footer
 145                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 146                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 147                 }
 148
 149                 return $content;
 150         }
 151
 152         /**
 153          * Creates a header that can be added to the output.
 154          *
 155          * @param string $header The header text.
 156          * @param string $canonicalId
 157          * @return string The HTML.
 158          */
 159         protected function makeHeader( $header, $canonicalId ) {
 160                 $spanAttribs = [ 'class' => 'mw-headline', 'id' => Sanitizer::escapeIdForAttribute( $header ) ];
 161                 $h2Attribs = [ 'id' => Sanitizer::escapeIdForAttribute( $canonicalId ) ];
 162
 163                 return Html::rawElement( 'h2', $h2Attribs, Html::element( 'span', $spanAttribs, $header ) );
 164         }
 165
 166         /**
 167          * Adds a row to a table that will be added to the content.
 168          *
 169          * @param string $table The table that will be added to the content
 170          * @param string $name The name of the row
 171          * @param string $value The value of the row
 172          * @param string $id The ID to use for the 'tr' element
 173          * @return string The table with the row added
 174          */
 175         protected function addRow( $table, $name, $value, $id ) {
 176                 return $table .
 177                         Html::rawElement(
 178                                 'tr',
 179                                 $id === null ? [] : [ 'id' => 'mw-' . $id ],
 180                                 Html::rawElement( 'td', [ 'style' => 'vertical-align: top;' ], $name ) .
 181                                         Html::rawElement( 'td', [], $value )
 182                         );
 183         }
 184
 185         /**
 186          * Adds a table to the content that will be added to the output.
 187          *
 188          * @param string $content The content that will be added to the output
 189          * @param string $table
 190          * @return string The content with the table added
 191          */
 192         protected function addTable( $content, $table ) {
 193                 return $content . Html::rawElement( 'table', [ 'class' => 'wikitable mw-page-info' ],
 194                         $table );
 195         }
 196
 197         /**
 198          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 199          * may add additional information in arbitrary positions. Array values are arrays with one
 200          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 201          *
 202          * @return array
 203          */
 204         protected function pageInfo() {
 205                 global $wgContLang;
 206
 207                 $user = $this->getUser();
 208                 $lang = $this->getLanguage();
 209                 $title = $this->getTitle();
 210                 $id = $title->getArticleID();
 211                 $config = $this->context->getConfig();
 212                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 213
 214                 $pageCounts = $this->pageCounts( $this->page );
 215
 216                 $pageProperties = [];
 217                 $props = PageProps::getInstance()->getAllProperties( $title );
 218                 if ( isset( $props[$id] ) ) {
 219                         $pageProperties = $props[$id];
 220                 }
 221
 222                 // Basic information
 223                 $pageInfo = [];
 224                 $pageInfo['header-basic'] = [];
 225
 226                 // Display title
 227                 $displayTitle = $title->getPrefixedText();
 228                 if ( isset( $pageProperties['displaytitle'] ) ) {
 229                         $displayTitle = $pageProperties['displaytitle'];
 230                 }
 231
 232                 $pageInfo['header-basic'][] = [
 233                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 234                 ];
 235
 236                 // Is it a redirect? If so, where to?
 237                 if ( $title->isRedirect() ) {
 238                         $pageInfo['header-basic'][] = [
 239                                 $this->msg( 'pageinfo-redirectsto' ),
 240                                 $linkRenderer->makeLink( $this->page->getRedirectTarget() ) .
 241                                 $this->msg( 'word-separator' )->escaped() .
 242                                 $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 243                                         $this->page->getRedirectTarget(),
 244                                         $this->msg( 'pageinfo-redirectsto-info' )->text(),
 245                                         [],
 246                                         [ 'action' => 'info' ]
 247                                 ) )->escaped()
 248                         ];
 249                 }
 250
 251                 // Default sort key
 252                 $sortKey = $title->getCategorySortkey();
 253                 if ( isset( $pageProperties['defaultsort'] ) ) {
 254                         $sortKey = $pageProperties['defaultsort'];
 255                 }
 256
 257                 $sortKey = htmlspecialchars( $sortKey );
 258                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-default-sort' ), $sortKey ];
 259
 260                 // Page length (in bytes)
 261                 $pageInfo['header-basic'][] = [
 262                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 263                 ];
 264
 265                 // Page ID (number not localised, as it's a database ID)
 266                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-article-id' ), $id ];
 267
 268                 // Language in which the page content is (supposed to be) written
 269                 $pageLang = $title->getPageLanguage()->getCode();
 270
 271                 $pageLangHtml = $pageLang . ' - ' .
 272                         Language::fetchLanguageName( $pageLang, $lang->getCode() );
 273                 // Link to Special:PageLanguage with pre-filled page title if user has permissions
 274                 if ( $config->get( 'PageLanguageUseDB' )
 275                         && $title->userCan( 'pagelang', $user )
 276                 ) {
 277                         $pageLangHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 278                                 SpecialPage::getTitleValueFor( 'PageLanguage', $title->getPrefixedText() ),
 279                                 $this->msg( 'pageinfo-language-change' )->text()
 280                         ) )->escaped();
 281                 }
 282
 283                 $pageInfo['header-basic'][] = [
 284                         $this->msg( 'pageinfo-language' )->escaped(),
 285                         $pageLangHtml
 286                 ];
 287
 288                 // Content model of the page
 289                 $modelHtml = htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) );
 290                 // If the user can change it, add a link to Special:ChangeContentModel
 291                 if ( $config->get( 'ContentHandlerUseDB' )
 292                         && $title->userCan( 'editcontentmodel', $user )
 293                 ) {
 294                         $modelHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 295                                 SpecialPage::getTitleValueFor( 'ChangeContentModel', $title->getPrefixedText() ),
 296                                 $this->msg( 'pageinfo-content-model-change' )->text()
 297                         ) )->escaped();
 298                 }
 299
 300                 $pageInfo['header-basic'][] = [
 301                         $this->msg( 'pageinfo-content-model' ),
 302                         $modelHtml
 303                 ];
 304
 305                 if ( $title->inNamespace( NS_USER ) ) {
 306                         $pageUser = User::newFromName( $title->getRootText() );
 307                         if ( $pageUser && $pageUser->getId() && !$pageUser->isHidden() ) {
 308                                 $pageInfo['header-basic'][] = [
 309                                         $this->msg( 'pageinfo-user-id' ),
 310                                         $pageUser->getId()
 311                                 ];
 312                         }
 313                 }
 314
 315                 // Search engine status
 316                 $pOutput = new ParserOutput();
 317                 if ( isset( $pageProperties['noindex'] ) ) {
 318                         $pOutput->setIndexPolicy( 'noindex' );
 319                 }
 320                 if ( isset( $pageProperties['index'] ) ) {
 321                         $pOutput->setIndexPolicy( 'index' );
 322                 }
 323
 324                 // Use robot policy logic
 325                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 326                 $pageInfo['header-basic'][] = [
 327                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 328                         $this->msg( 'pageinfo-robot-policy' ),
 329                         $this->msg( "pageinfo-robot-${policy['index']}" )
 330                 ];
 331
 332                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 333                 if (
 334                         $user->isAllowed( 'unwatchedpages' ) ||
 335                         ( $unwatchedPageThreshold !== false &&
 336                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 337                 ) {
 338                         // Number of page watchers
 339                         $pageInfo['header-basic'][] = [
 340                                 $this->msg( 'pageinfo-watchers' ),
 341                                 $lang->formatNum( $pageCounts['watchers'] )
 342                         ];
 343                         if (
 344                                 $config->get( 'ShowUpdatedMarker' ) &&
 345                                 isset( $pageCounts['visitingWatchers'] )
 346                         ) {
 347                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 348                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 349                                         $user->isAllowed( 'unwatchedpages' ) ) {
 350                                         $pageInfo['header-basic'][] = [
 351                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 352                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 353                                         ];
 354                                 } else {
 355                                         $pageInfo['header-basic'][] = [
 356                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 357                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 358                                         ];
 359                                 }
 360                         }
 361                 } elseif ( $unwatchedPageThreshold !== false ) {
 362                         $pageInfo['header-basic'][] = [
 363                                 $this->msg( 'pageinfo-watchers' ),
 364                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 365                         ];
 366                 }
 367
 368                 // Redirects to this page
 369                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 370                 $pageInfo['header-basic'][] = [
 371                         $linkRenderer->makeLink(
 372                                 $whatLinksHere,
 373                                 $this->msg( 'pageinfo-redirects-name' )->text(),
 374                                 [],
 375                                 [
 376                                         'hidelinks' => 1,
 377                                         'hidetrans' => 1,
 378                                         'hideimages' => $title->getNamespace() == NS_FILE
 379                                 ]
 380                         ),
 381                         $this->msg( 'pageinfo-redirects-value' )
 382                                 ->numParams( count( $title->getRedirectsHere() ) )
 383                 ];
 384
 385                 // Is it counted as a content page?
 386                 if ( $this->page->isCountable() ) {
 387                         $pageInfo['header-basic'][] = [
 388                                 $this->msg( 'pageinfo-contentpage' ),
 389                                 $this->msg( 'pageinfo-contentpage-yes' )
 390                         ];
 391                 }
 392
 393                 // Subpages of this page, if subpages are enabled for the current NS
 394                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 395                         $prefixIndex = SpecialPage::getTitleFor(
 396                                 'Prefixindex', $title->getPrefixedText() . '/' );
 397                         $pageInfo['header-basic'][] = [
 398                                 $linkRenderer->makeLink(
 399                                         $prefixIndex,
 400                                         $this->msg( 'pageinfo-subpages-name' )->text()
 401                                 ),
 402                                 $this->msg( 'pageinfo-subpages-value' )
 403                                         ->numParams(
 404                                                 $pageCounts['subpages']['total'],
 405                                                 $pageCounts['subpages']['redirects'],
 406                                                 $pageCounts['subpages']['nonredirects'] )
 407                         ];
 408                 }
 409
 410                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 411                         $category = Category::newFromTitle( $title );
 412
 413                         // $allCount is the total number of cat members,
 414                         // not the count of how many members are normal pages.
 415                         $allCount = (int)$category->getPageCount();
 416                         $subcatCount = (int)$category->getSubcatCount();
 417                         $fileCount = (int)$category->getFileCount();
 418                         $pagesCount = $allCount - $subcatCount - $fileCount;
 419
 420                         $pageInfo['category-info'] = [
 421                                 [
 422                                         $this->msg( 'pageinfo-category-total' ),
 423                                         $lang->formatNum( $allCount )
 424                                 ],
 425                                 [
 426                                         $this->msg( 'pageinfo-category-pages' ),
 427                                         $lang->formatNum( $pagesCount )
 428                                 ],
 429                                 [
 430                                         $this->msg( 'pageinfo-category-subcats' ),
 431                                         $lang->formatNum( $subcatCount )
 432                                 ],
 433                                 [
 434                                         $this->msg( 'pageinfo-category-files' ),
 435                                         $lang->formatNum( $fileCount )
 436                                 ]
 437                         ];
 438                 }
 439
 440                 // Display image SHA-1 value
 441                 if ( $title->inNamespace( NS_FILE ) ) {
 442                         $fileObj = wfFindFile( $title );
 443                         if ( $fileObj !== false ) {
 444                                 // Convert the base-36 sha1 value obtained from database to base-16
 445                                 $output = Wikimedia\base_convert( $fileObj->getSha1(), 36, 16, 40 );
 446                                 $pageInfo['header-basic'][] = [
 447                                         $this->msg( 'pageinfo-file-hash' ),
 448                                         $output
 449                                 ];
 450                         }
 451                 }
 452
 453                 // Page protection
 454                 $pageInfo['header-restrictions'] = [];
 455
 456                 // Is this page affected by the cascading protection of something which includes it?
 457                 if ( $title->isCascadeProtected() ) {
 458                         $cascadingFrom = '';
 459                         $sources = $title->getCascadeProtectionSources()[0];
 460
 461                         foreach ( $sources as $sourceTitle ) {
 462                                 $cascadingFrom .= Html::rawElement(
 463                                         'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
 464                         }
 465
 466                         $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
 467                         $pageInfo['header-restrictions'][] = [
 468                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 469                                 $cascadingFrom
 470                         ];
 471                 }
 472
 473                 // Is out protection set to cascade to other pages?
 474                 if ( $title->areRestrictionsCascading() ) {
 475                         $pageInfo['header-restrictions'][] = [
 476                                 $this->msg( 'pageinfo-protect-cascading' ),
 477                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 478                         ];
 479                 }
 480
 481                 // Page protection
 482                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 483                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 484
 485                         if ( $protectionLevel == '' ) {
 486                                 // Allow all users
 487                                 $message = $this->msg( 'protect-default' )->escaped();
 488                         } else {
 489                                 // Administrators only
 490                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 491                                 $message = $this->msg( "protect-level-$protectionLevel" );
 492                                 if ( $message->isDisabled() ) {
 493                                         // Require "$1" permission
 494                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 495                                 } else {
 496                                         $message = $message->escaped();
 497                                 }
 498                         }
 499                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 500                         $formattedexpiry = $this->msg( 'parentheses',
 501                                 $lang->formatExpiry( $expiry ) )->escaped();
 502                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 503
 504                         // Messages: restriction-edit, restriction-move, restriction-create,
 505                         // restriction-upload
 506                         $pageInfo['header-restrictions'][] = [
 507                                 $this->msg( "restriction-$restrictionType" ), $message
 508                         ];
 509                 }
 510
 511                 if ( !$this->page->exists() ) {
 512                         return $pageInfo;
 513                 }
 514
 515                 // Edit history
 516                 $pageInfo['header-edits'] = [];
 517
 518                 $firstRev = $this->page->getOldestRevision();
 519                 $lastRev = $this->page->getRevision();
 520                 $batch = new LinkBatch;
 521
 522                 if ( $firstRev ) {
 523                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 524                         if ( $firstRevUser !== '' ) {
 525                                 $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
 526                                 $batch->addObj( $firstRevUserTitle );
 527                                 $batch->addObj( $firstRevUserTitle->getTalkPage() );
 528                         }
 529                 }
 530
 531                 if ( $lastRev ) {
 532                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 533                         if ( $lastRevUser !== '' ) {
 534                                 $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
 535                                 $batch->addObj( $lastRevUserTitle );
 536                                 $batch->addObj( $lastRevUserTitle->getTalkPage() );
 537                         }
 538                 }
 539
 540                 $batch->execute();
 541
 542                 if ( $firstRev ) {
 543                         // Page creator
 544                         $pageInfo['header-edits'][] = [
 545                                 $this->msg( 'pageinfo-firstuser' ),
 546                                 Linker::revUserTools( $firstRev )
 547                         ];
 548
 549                         // Date of page creation
 550                         $pageInfo['header-edits'][] = [
 551                                 $this->msg( 'pageinfo-firsttime' ),
 552                                 $linkRenderer->makeKnownLink(
 553                                         $title,
 554                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 555                                         [],
 556                                         [ 'oldid' => $firstRev->getId() ]
 557                                 )
 558                         ];
 559                 }
 560
 561                 if ( $lastRev ) {
 562                         // Latest editor
 563                         $pageInfo['header-edits'][] = [
 564                                 $this->msg( 'pageinfo-lastuser' ),
 565                                 Linker::revUserTools( $lastRev )
 566                         ];
 567
 568                         // Date of latest edit
 569                         $pageInfo['header-edits'][] = [
 570                                 $this->msg( 'pageinfo-lasttime' ),
 571                                 $linkRenderer->makeKnownLink(
 572                                         $title,
 573                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 574                                         [],
 575                                         [ 'oldid' => $this->page->getLatest() ]
 576                                 )
 577                         ];
 578                 }
 579
 580                 // Total number of edits
 581                 $pageInfo['header-edits'][] = [
 582                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 583                 ];
 584
 585                 // Total number of distinct authors
 586                 if ( $pageCounts['authors'] > 0 ) {
 587                         $pageInfo['header-edits'][] = [
 588                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 589                         ];
 590                 }
 591
 592                 // Recent number of edits (within past 30 days)
 593                 $pageInfo['header-edits'][] = [
 594                         $this->msg( 'pageinfo-recent-edits',
 595                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 596                         $lang->formatNum( $pageCounts['recent_edits'] )
 597                 ];
 598
 599                 // Recent number of distinct authors
 600                 $pageInfo['header-edits'][] = [
 601                         $this->msg( 'pageinfo-recent-authors' ),
 602                         $lang->formatNum( $pageCounts['recent_authors'] )
 603                 ];
 604
 605                 // Array of MagicWord objects
 606                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 607
 608                 // Array of magic word IDs
 609                 $wordIDs = $magicWords->names;
 610
 611                 // Array of IDs => localized magic words
 612                 $localizedWords = $wgContLang->getMagicWords();
 613
 614                 $listItems = [];
 615                 foreach ( $pageProperties as $property => $value ) {
 616                         if ( in_array( $property, $wordIDs ) ) {
 617                                 $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
 618                         }
 619                 }
 620
 621                 $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
 622                 $hiddenCategories = $this->page->getHiddenCategories();
 623
 624                 if (
 625                         count( $listItems ) > 0 ||
 626                         count( $hiddenCategories ) > 0 ||
 627                         $pageCounts['transclusion']['from'] > 0 ||
 628                         $pageCounts['transclusion']['to'] > 0
 629                 ) {
 630                         $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
 631                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 632                         if ( $config->get( 'MiserMode' ) ) {
 633                                 $transcludedTargets = [];
 634                         } else {
 635                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 636                         }
 637
 638                         // Page properties
 639                         $pageInfo['header-properties'] = [];
 640
 641                         // Magic words
 642                         if ( count( $listItems ) > 0 ) {
 643                                 $pageInfo['header-properties'][] = [
 644                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 645                                         $localizedList
 646                                 ];
 647                         }
 648
 649                         // Hidden categories
 650                         if ( count( $hiddenCategories ) > 0 ) {
 651                                 $pageInfo['header-properties'][] = [
 652                                         $this->msg( 'pageinfo-hidden-categories' )
 653                                                 ->numParams( count( $hiddenCategories ) ),
 654                                         Linker::formatHiddenCategories( $hiddenCategories )
 655                                 ];
 656                         }
 657
 658                         // Transcluded templates
 659                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 660                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 661                                         $more = $this->msg( 'morenotlisted' )->escaped();
 662                                 } else {
 663                                         $more = null;
 664                                 }
 665
 666                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 667                                         $this->getContext(),
 668                                         $linkRenderer
 669                                 );
 670
 671                                 $pageInfo['header-properties'][] = [
 672                                         $this->msg( 'pageinfo-templates' )
 673                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 674                                         $templateListFormatter->format( $transcludedTemplates, false, $more )
 675                                 ];
 676                         }
 677
 678                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 679                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 680                                         $more = $linkRenderer->makeLink(
 681                                                 $whatLinksHere,
 682                                                 $this->msg( 'moredotdotdot' )->text(),
 683                                                 [],
 684                                                 [ 'hidelinks' => 1, 'hideredirs' => 1 ]
 685                                         );
 686                                 } else {
 687                                         $more = null;
 688                                 }
 689
 690                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 691                                         $this->getContext(),
 692                                         $linkRenderer
 693                                 );
 694
 695                                 $pageInfo['header-properties'][] = [
 696                                         $this->msg( 'pageinfo-transclusions' )
 697                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 698                                         $templateListFormatter->format( $transcludedTargets, false, $more )
 699                                 ];
 700                         }
 701                 }
 702
 703                 return $pageInfo;
 704         }
 705
 706         /**
 707          * Returns page counts that would be too "expensive" to retrieve by normal means.
 708          *
 709          * @param WikiPage|Article|Page $page
 710          * @return array
 711          */
 712         protected function pageCounts( Page $page ) {
 713                 $fname = __METHOD__;
 714                 $config = $this->context->getConfig();
 715                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 716
 717                 return $cache->getWithSetCallback(
 718                         self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
 719                         WANObjectCache::TTL_WEEK,
 720                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname ) {
 721                                 global $wgActorTableSchemaMigrationStage;
 722
 723                                 $title = $page->getTitle();
 724                                 $id = $title->getArticleID();
 725
 726                                 $dbr = wfGetDB( DB_REPLICA );
 727                                 $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
 728                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 729
 730                                 if ( $wgActorTableSchemaMigrationStage === MIGRATION_NEW ) {
 731                                         $tables = [ 'revision_actor_temp' ];
 732                                         $field = 'revactor_actor';
 733                                         $pageField = 'revactor_page';
 734                                         $tsField = 'revactor_timestamp';
 735                                         $joins = [];
 736                                 } elseif ( $wgActorTableSchemaMigrationStage === MIGRATION_OLD ) {
 737                                         $tables = [ 'revision' ];
 738                                         $field = 'rev_user_text';
 739                                         $pageField = 'rev_page';
 740                                         $tsField = 'rev_timestamp';
 741                                         $joins = [];
 742                                 } else {
 743                                         $tables = [ 'revision', 'revision_actor_temp', 'actor' ];
 744                                         $field = 'COALESCE( actor_name, rev_user_text)';
 745                                         $pageField = 'rev_page';
 746                                         $tsField = 'rev_timestamp';
 747                                         $joins = [
 748                                                 'revision_actor_temp' => [ 'LEFT JOIN', 'revactor_rev = rev_id' ],
 749                                                 'actor' => [ 'LEFT JOIN', 'revactor_actor = actor_id' ],
 750                                         ];
 751                                 }
 752
 753                                 $watchedItemStore = MediaWikiServices::getInstance()->getWatchedItemStore();
 754
 755                                 $result = [];
 756                                 $result['watchers'] = $watchedItemStore->countWatchers( $title );
 757
 758                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 759                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 760                                         $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
 761                                                 $title,
 762                                                 $updated - $config->get( 'WatchersMaxAge' )
 763                                         );
 764                                 }
 765
 766                                 // Total number of edits
 767                                 $edits = (int)$dbr->selectField(
 768                                         'revision',
 769                                         'COUNT(*)',
 770                                         [ 'rev_page' => $id ],
 771                                         $fname
 772                                 );
 773                                 $result['edits'] = $edits;
 774
 775                                 // Total number of distinct authors
 776                                 if ( $config->get( 'MiserMode' ) ) {
 777                                         $result['authors'] = 0;
 778                                 } else {
 779                                         $result['authors'] = (int)$dbr->selectField(
 780                                                 $tables,
 781                                                 "COUNT(DISTINCT $field)",
 782                                                 [ $pageField => $id ],
 783                                                 $fname,
 784                                                 [],
 785                                                 $joins
 786                                         );
 787                                 }
 788
 789                                 // "Recent" threshold defined by RCMaxAge setting
 790                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 791
 792                                 // Recent number of edits
 793                                 $edits = (int)$dbr->selectField(
 794                                         'revision',
 795                                         'COUNT(rev_page)',
 796                                         [
 797                                                 'rev_page' => $id,
 798                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 799                                         ],
 800                                         $fname
 801                                 );
 802                                 $result['recent_edits'] = $edits;
 803
 804                                 // Recent number of distinct authors
 805                                 $result['recent_authors'] = (int)$dbr->selectField(
 806                                         $tables,
 807                                         "COUNT(DISTINCT $field)",
 808                                         [
 809                                                 $pageField => $id,
 810                                                 "$tsField >= " . $dbr->addQuotes( $threshold )
 811                                         ],
 812                                         $fname,
 813                                         [],
 814                                         $joins
 815                                 );
 816
 817                                 // Subpages (if enabled)
 818                                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 819                                         $conds = [ 'page_namespace' => $title->getNamespace() ];
 820                                         $conds[] = 'page_title ' .
 821                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 822
 823                                         // Subpages of this page (redirects)
 824                                         $conds['page_is_redirect'] = 1;
 825                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 826                                                 'page',
 827                                                 'COUNT(page_id)',
 828                                                 $conds,
 829                                                 $fname
 830                                         );
 831
 832                                         // Subpages of this page (non-redirects)
 833                                         $conds['page_is_redirect'] = 0;
 834                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 835                                                 'page',
 836                                                 'COUNT(page_id)',
 837                                                 $conds,
 838                                                 $fname
 839                                         );
 840
 841                                         // Subpages of this page (total)
 842                                         $result['subpages']['total'] = $result['subpages']['redirects']
 843                                                 + $result['subpages']['nonredirects'];
 844                                 }
 845
 846                                 // Counts for the number of transclusion links (to/from)
 847                                 if ( $config->get( 'MiserMode' ) ) {
 848                                         $result['transclusion']['to'] = 0;
 849                                 } else {
 850                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 851                                                 'templatelinks',
 852                                                 'COUNT(tl_from)',
 853                                                 [
 854                                                         'tl_namespace' => $title->getNamespace(),
 855                                                         'tl_title' => $title->getDBkey()
 856                                                 ],
 857                                                 $fname
 858                                         );
 859                                 }
 860
 861                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 862                                         'templatelinks',
 863                                         'COUNT(*)',
 864                                         [ 'tl_from' => $title->getArticleID() ],
 865                                         $fname
 866                                 );
 867
 868                                 return $result;
 869                         }
 870                 );
 871         }
 872
 873         /**
 874          * Returns the name that goes in the "<h1>" page title.
 875          *
 876          * @return string
 877          */
 878         protected function getPageTitle() {
 879                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 880         }
 881
 882         /**
 883          * Get a list of contributors of $article
 884          * @return string Html
 885          */
 886         protected function getContributors() {
 887                 $contributors = $this->page->getContributors();
 888                 $real_names = [];
 889                 $user_names = [];
 890                 $anon_ips = [];
 891                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 892
 893                 # Sift for real versus user names
 894                 /** @var User $user */
 895                 foreach ( $contributors as $user ) {
 896                         $page = $user->isAnon()
 897                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 898                                 : $user->getUserPage();
 899
 900                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 901                         if ( $user->getId() == 0 ) {
 902                                 $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
 903                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 904                                 $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
 905                         } else {
 906                                 $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
 907                         }
 908                 }
 909
 910                 $lang = $this->getLanguage();
 911
 912                 $real = $lang->listToText( $real_names );
 913
 914                 # "ThisSite user(s) A, B and C"
 915                 if ( count( $user_names ) ) {
 916                         $user = $this->msg( 'siteusers' )
 917                                 ->rawParams( $lang->listToText( $user_names ) )
 918                                 ->params( count( $user_names ) )->escaped();
 919                 } else {
 920                         $user = false;
 921                 }
 922
 923                 if ( count( $anon_ips ) ) {
 924                         $anon = $this->msg( 'anonusers' )
 925                                 ->rawParams( $lang->listToText( $anon_ips ) )
 926                                 ->params( count( $anon_ips ) )->escaped();
 927                 } else {
 928                         $anon = false;
 929                 }
 930
 931                 # This is the big list, all mooshed together. We sift for blank strings
 932                 $fulllist = [];
 933                 foreach ( [ $real, $user, $anon ] as $s ) {
 934                         if ( $s !== '' ) {
 935                                 array_push( $fulllist, $s );
 936                         }
 937                 }
 938
 939                 $count = count( $fulllist );
 940
 941                 # "Based on work by ..."
 942                 return $count
 943                         ? $this->msg( 'othercontribs' )->rawParams(
 944                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 945                         : '';
 946         }
 947
 948         /**
 949          * Returns the description that goes below the "<h1>" tag.
 950          *
 951          * @return string
 952          */
 953         protected function getDescription() {
 954                 return '';
 955         }
 956
 957         /**
 958          * @param WANObjectCache $cache
 959          * @param Title $title
 960          * @param int $revId
 961          * @return string
 962          */
 963         protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
 964                 return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 965         }
 966 }