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                 // "Help" button
 107                 $this->addHelpLink( 'Page information' );
 108
 109                 // Page header
 110                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 111                         $content .= $this->msg( 'pageinfo-header' )->parse();
 112                 }
 113
 114                 // Hide "This page is a member of # hidden categories" explanation
 115                 $content .= Html::element( 'style', [],
 116                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 117
 118                 // Hide "Templates used on this page" explanation
 119                 $content .= Html::element( 'style', [],
 120                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 121
 122                 // Get page information
 123                 $pageInfo = $this->pageInfo();
 124
 125                 // Allow extensions to add additional information
 126                 Hooks::run( 'InfoAction', [ $this->getContext(), &$pageInfo ] );
 127
 128                 // Render page information
 129                 foreach ( $pageInfo as $header => $infoTable ) {
 130                         // Messages:
 131                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 132                         // pageinfo-header-properties, pageinfo-category-info
 133                         $content .= $this->makeHeader(
 134                                 $this->msg( "pageinfo-${header}" )->text(),
 135                                 "mw-pageinfo-${header}"
 136                         ) . "\n";
 137                         $table = "\n";
 138                         $below = "";
 139                         foreach ( $infoTable as $infoRow ) {
 140                                 if ( $infoRow[0] == "below" ) {
 141                                         $below = $infoRow[1] . "\n";
 142                                         continue;
 143                                 }
 144                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 145                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 146                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 147                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 148                         }
 149                         $content = $this->addTable( $content, $table ) . "\n" . $below;
 150                 }
 151
 152                 // Page footer
 153                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 154                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 155                 }
 156
 157                 return $content;
 158         }
 159
 160         /**
 161          * Creates a header that can be added to the output.
 162          *
 163          * @param string $header The header text.
 164          * @param string $canonicalId
 165          * @return string The HTML.
 166          */
 167         protected function makeHeader( $header, $canonicalId ) {
 168                 $spanAttribs = [ 'class' => 'mw-headline', 'id' => Sanitizer::escapeIdForAttribute( $header ) ];
 169                 $h2Attribs = [ 'id' => Sanitizer::escapeIdForAttribute( $canonicalId ) ];
 170
 171                 return Html::rawElement( 'h2', $h2Attribs, Html::element( 'span', $spanAttribs, $header ) );
 172         }
 173
 174         /**
 175          * Adds a row to a table that will be added to the content.
 176          *
 177          * @param string $table The table that will be added to the content
 178          * @param string $name The name of the row
 179          * @param string $value The value of the row
 180          * @param string|null $id The ID to use for the 'tr' element
 181          * @return string The table with the row added
 182          */
 183         protected function addRow( $table, $name, $value, $id ) {
 184                 return $table .
 185                         Html::rawElement(
 186                                 'tr',
 187                                 $id === null ? [] : [ 'id' => 'mw-' . $id ],
 188                                 Html::rawElement( 'td', [ 'style' => 'vertical-align: top;' ], $name ) .
 189                                         Html::rawElement( 'td', [], $value )
 190                         );
 191         }
 192
 193         /**
 194          * Adds a table to the content that will be added to the output.
 195          *
 196          * @param string $content The content that will be added to the output
 197          * @param string $table
 198          * @return string The content with the table added
 199          */
 200         protected function addTable( $content, $table ) {
 201                 return $content . Html::rawElement( 'table', [ 'class' => 'wikitable mw-page-info' ],
 202                         $table );
 203         }
 204
 205         /**
 206          * Returns an array of info groups (will be rendered as tables), keyed by group ID.
 207          * Group IDs are arbitrary and used so that extensions may add additional information in
 208          * arbitrary positions (and as message keys for section headers for the tables, prefixed
 209          * with 'pageinfo-').
 210          * Each info group is a non-associative array of info items (rendered as table rows).
 211          * Each info item is an array with two elements: the first describes the type of
 212          * information, the second the value for the current page. Both can be strings (will be
 213          * interpreted as raw HTML) or messages (will be interpreted as plain text and escaped).
 214          *
 215          * @return array
 216          */
 217         protected function pageInfo() {
 218                 $services = MediaWikiServices::getInstance();
 219
 220                 $user = $this->getUser();
 221                 $lang = $this->getLanguage();
 222                 $title = $this->getTitle();
 223                 $id = $title->getArticleID();
 224                 $config = $this->context->getConfig();
 225                 $linkRenderer = $services->getLinkRenderer();
 226
 227                 $pageCounts = $this->pageCounts( $this->page );
 228
 229                 $props = PageProps::getInstance()->getAllProperties( $title );
 230                 $pageProperties = $props[$id] ?? [];
 231
 232                 // Basic information
 233                 $pageInfo = [];
 234                 $pageInfo['header-basic'] = [];
 235
 236                 // Display title
 237                 $displayTitle = $pageProperties['displaytitle'] ?? $title->getPrefixedText();
 238
 239                 $pageInfo['header-basic'][] = [
 240                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 241                 ];
 242
 243                 // Is it a redirect? If so, where to?
 244                 $redirectTarget = $this->page->getRedirectTarget();
 245                 if ( $redirectTarget !== null ) {
 246                         $pageInfo['header-basic'][] = [
 247                                 $this->msg( 'pageinfo-redirectsto' ),
 248                                 $linkRenderer->makeLink( $redirectTarget ) .
 249                                 $this->msg( 'word-separator' )->escaped() .
 250                                 $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 251                                         $redirectTarget,
 252                                         $this->msg( 'pageinfo-redirectsto-info' )->text(),
 253                                         [],
 254                                         [ 'action' => 'info' ]
 255                                 ) )->escaped()
 256                         ];
 257                 }
 258
 259                 // Default sort key
 260                 $sortKey = $pageProperties['defaultsort'] ?? $title->getCategorySortkey();
 261
 262                 $sortKey = htmlspecialchars( $sortKey );
 263                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-default-sort' ), $sortKey ];
 264
 265                 // Page length (in bytes)
 266                 $pageInfo['header-basic'][] = [
 267                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 268                 ];
 269
 270                 // Page namespace
 271                 $pageNamespace = $title->getNsText();
 272                 if ( $pageNamespace ) {
 273                         $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-namespace' ), $pageNamespace ];
 274                 }
 275
 276                 // Page ID (number not localised, as it's a database ID)
 277                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-article-id' ), $id ];
 278
 279                 // Language in which the page content is (supposed to be) written
 280                 $pageLang = $title->getPageLanguage()->getCode();
 281
 282                 $permissionManager = MediaWikiServices::getInstance()->getPermissionManager();
 283
 284                 $pageLangHtml = $pageLang . ' - ' .
 285                         Language::fetchLanguageName( $pageLang, $lang->getCode() );
 286                 // Link to Special:PageLanguage with pre-filled page title if user has permissions
 287                 if ( $config->get( 'PageLanguageUseDB' )
 288                         && $permissionManager->userCan( 'pagelang', $user, $title )
 289                 ) {
 290                         $pageLangHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 291                                 SpecialPage::getTitleValueFor( 'PageLanguage', $title->getPrefixedText() ),
 292                                 $this->msg( 'pageinfo-language-change' )->text()
 293                         ) )->escaped();
 294                 }
 295
 296                 $pageInfo['header-basic'][] = [
 297                         $this->msg( 'pageinfo-language' )->escaped(),
 298                         $pageLangHtml
 299                 ];
 300
 301                 // Content model of the page
 302                 $modelHtml = htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) );
 303                 // If the user can change it, add a link to Special:ChangeContentModel
 304                 if ( $config->get( 'ContentHandlerUseDB' )
 305                         && $permissionManager->userCan( 'editcontentmodel', $user, $title )
 306                 ) {
 307                         $modelHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 308                                 SpecialPage::getTitleValueFor( 'ChangeContentModel', $title->getPrefixedText() ),
 309                                 $this->msg( 'pageinfo-content-model-change' )->text()
 310                         ) )->escaped();
 311                 }
 312
 313                 $pageInfo['header-basic'][] = [
 314                         $this->msg( 'pageinfo-content-model' ),
 315                         $modelHtml
 316                 ];
 317
 318                 if ( $title->inNamespace( NS_USER ) ) {
 319                         $pageUser = User::newFromName( $title->getRootText() );
 320                         if ( $pageUser && $pageUser->getId() && !$pageUser->isHidden() ) {
 321                                 $pageInfo['header-basic'][] = [
 322                                         $this->msg( 'pageinfo-user-id' ),
 323                                         $pageUser->getId()
 324                                 ];
 325                         }
 326                 }
 327
 328                 // Search engine status
 329                 $pOutput = new ParserOutput();
 330                 if ( isset( $pageProperties['noindex'] ) ) {
 331                         $pOutput->setIndexPolicy( 'noindex' );
 332                 }
 333                 if ( isset( $pageProperties['index'] ) ) {
 334                         $pOutput->setIndexPolicy( 'index' );
 335                 }
 336
 337                 // Use robot policy logic
 338                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 339                 $pageInfo['header-basic'][] = [
 340                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 341                         $this->msg( 'pageinfo-robot-policy' ),
 342                         $this->msg( "pageinfo-robot-${policy['index']}" )
 343                 ];
 344
 345                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 346                 if (
 347                         $user->isAllowed( 'unwatchedpages' ) ||
 348                         ( $unwatchedPageThreshold !== false &&
 349                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 350                 ) {
 351                         // Number of page watchers
 352                         $pageInfo['header-basic'][] = [
 353                                 $this->msg( 'pageinfo-watchers' ),
 354                                 $lang->formatNum( $pageCounts['watchers'] )
 355                         ];
 356                         if (
 357                                 $config->get( 'ShowUpdatedMarker' ) &&
 358                                 isset( $pageCounts['visitingWatchers'] )
 359                         ) {
 360                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 361                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 362                                         $user->isAllowed( 'unwatchedpages' ) ) {
 363                                         $pageInfo['header-basic'][] = [
 364                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 365                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 366                                         ];
 367                                 } else {
 368                                         $pageInfo['header-basic'][] = [
 369                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 370                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 371                                         ];
 372                                 }
 373                         }
 374                 } elseif ( $unwatchedPageThreshold !== false ) {
 375                         $pageInfo['header-basic'][] = [
 376                                 $this->msg( 'pageinfo-watchers' ),
 377                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 378                         ];
 379                 }
 380
 381                 // Redirects to this page
 382                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 383                 $pageInfo['header-basic'][] = [
 384                         $linkRenderer->makeLink(
 385                                 $whatLinksHere,
 386                                 $this->msg( 'pageinfo-redirects-name' )->text(),
 387                                 [],
 388                                 [
 389                                         'hidelinks' => 1,
 390                                         'hidetrans' => 1,
 391                                         'hideimages' => $title->getNamespace() == NS_FILE
 392                                 ]
 393                         ),
 394                         $this->msg( 'pageinfo-redirects-value' )
 395                                 ->numParams( count( $title->getRedirectsHere() ) )
 396                 ];
 397
 398                 // Is it counted as a content page?
 399                 if ( $this->page->isCountable() ) {
 400                         $pageInfo['header-basic'][] = [
 401                                 $this->msg( 'pageinfo-contentpage' ),
 402                                 $this->msg( 'pageinfo-contentpage-yes' )
 403                         ];
 404                 }
 405
 406                 // Subpages of this page, if subpages are enabled for the current NS
 407                 if ( $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() ) ) {
 408                         $prefixIndex = SpecialPage::getTitleFor(
 409                                 'Prefixindex', $title->getPrefixedText() . '/' );
 410                         $pageInfo['header-basic'][] = [
 411                                 $linkRenderer->makeLink(
 412                                         $prefixIndex,
 413                                         $this->msg( 'pageinfo-subpages-name' )->text()
 414                                 ),
 415                                 $this->msg( 'pageinfo-subpages-value' )
 416                                         ->numParams(
 417                                                 $pageCounts['subpages']['total'],
 418                                                 $pageCounts['subpages']['redirects'],
 419                                                 $pageCounts['subpages']['nonredirects'] )
 420                         ];
 421                 }
 422
 423                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 424                         $category = Category::newFromTitle( $title );
 425
 426                         // $allCount is the total number of cat members,
 427                         // not the count of how many members are normal pages.
 428                         $allCount = (int)$category->getPageCount();
 429                         $subcatCount = (int)$category->getSubcatCount();
 430                         $fileCount = (int)$category->getFileCount();
 431                         $pagesCount = $allCount - $subcatCount - $fileCount;
 432
 433                         $pageInfo['category-info'] = [
 434                                 [
 435                                         $this->msg( 'pageinfo-category-total' ),
 436                                         $lang->formatNum( $allCount )
 437                                 ],
 438                                 [
 439                                         $this->msg( 'pageinfo-category-pages' ),
 440                                         $lang->formatNum( $pagesCount )
 441                                 ],
 442                                 [
 443                                         $this->msg( 'pageinfo-category-subcats' ),
 444                                         $lang->formatNum( $subcatCount )
 445                                 ],
 446                                 [
 447                                         $this->msg( 'pageinfo-category-files' ),
 448                                         $lang->formatNum( $fileCount )
 449                                 ]
 450                         ];
 451                 }
 452
 453                 // Display image SHA-1 value
 454                 if ( $title->inNamespace( NS_FILE ) ) {
 455                         $fileObj = $services->getRepoGroup()->findFile( $title );
 456                         if ( $fileObj !== false ) {
 457                                 // Convert the base-36 sha1 value obtained from database to base-16
 458                                 $output = Wikimedia\base_convert( $fileObj->getSha1(), 36, 16, 40 );
 459                                 $pageInfo['header-basic'][] = [
 460                                         $this->msg( 'pageinfo-file-hash' ),
 461                                         $output
 462                                 ];
 463                         }
 464                 }
 465
 466                 // Page protection
 467                 $pageInfo['header-restrictions'] = [];
 468
 469                 // Is this page affected by the cascading protection of something which includes it?
 470                 if ( $title->isCascadeProtected() ) {
 471                         $cascadingFrom = '';
 472                         $sources = $title->getCascadeProtectionSources()[0];
 473
 474                         foreach ( $sources as $sourceTitle ) {
 475                                 $cascadingFrom .= Html::rawElement(
 476                                         'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
 477                         }
 478
 479                         $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
 480                         $pageInfo['header-restrictions'][] = [
 481                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 482                                 $cascadingFrom
 483                         ];
 484                 }
 485
 486                 // Is out protection set to cascade to other pages?
 487                 if ( $title->areRestrictionsCascading() ) {
 488                         $pageInfo['header-restrictions'][] = [
 489                                 $this->msg( 'pageinfo-protect-cascading' ),
 490                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 491                         ];
 492                 }
 493
 494                 // Page protection
 495                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 496                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 497
 498                         if ( $protectionLevel == '' ) {
 499                                 // Allow all users
 500                                 $message = $this->msg( 'protect-default' )->escaped();
 501                         } else {
 502                                 // Administrators only
 503                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 504                                 $message = $this->msg( "protect-level-$protectionLevel" );
 505                                 if ( $message->isDisabled() ) {
 506                                         // Require "$1" permission
 507                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 508                                 } else {
 509                                         $message = $message->escaped();
 510                                 }
 511                         }
 512                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 513                         $formattedexpiry = $this->msg( 'parentheses',
 514                                 $lang->formatExpiry( $expiry ) )->escaped();
 515                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 516
 517                         // Messages: restriction-edit, restriction-move, restriction-create,
 518                         // restriction-upload
 519                         $pageInfo['header-restrictions'][] = [
 520                                 $this->msg( "restriction-$restrictionType" ), $message
 521                         ];
 522                 }
 523                 $protectLog = SpecialPage::getTitleFor( 'Log' );
 524                 $pageInfo['header-restrictions'][] = [
 525                         'below',
 526                         $linkRenderer->makeKnownLink(
 527                                 $protectLog,
 528                                 $this->msg( 'pageinfo-view-protect-log' )->text(),
 529                                 [],
 530                                 [ 'type' => 'protect', 'page' => $title->getPrefixedText() ]
 531                         ),
 532                 ];
 533
 534                 if ( !$this->page->exists() ) {
 535                         return $pageInfo;
 536                 }
 537
 538                 // Edit history
 539                 $pageInfo['header-edits'] = [];
 540
 541                 $firstRev = $this->page->getOldestRevision();
 542                 $lastRev = $this->page->getRevision();
 543                 $batch = new LinkBatch;
 544
 545                 if ( $firstRev ) {
 546                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 547                         if ( $firstRevUser !== '' ) {
 548                                 $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
 549                                 $batch->addObj( $firstRevUserTitle );
 550                                 $batch->addObj( $firstRevUserTitle->getTalkPage() );
 551                         }
 552                 }
 553
 554                 if ( $lastRev ) {
 555                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 556                         if ( $lastRevUser !== '' ) {
 557                                 $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
 558                                 $batch->addObj( $lastRevUserTitle );
 559                                 $batch->addObj( $lastRevUserTitle->getTalkPage() );
 560                         }
 561                 }
 562
 563                 $batch->execute();
 564
 565                 if ( $firstRev ) {
 566                         // Page creator
 567                         $pageInfo['header-edits'][] = [
 568                                 $this->msg( 'pageinfo-firstuser' ),
 569                                 Linker::revUserTools( $firstRev )
 570                         ];
 571
 572                         // Date of page creation
 573                         $pageInfo['header-edits'][] = [
 574                                 $this->msg( 'pageinfo-firsttime' ),
 575                                 $linkRenderer->makeKnownLink(
 576                                         $title,
 577                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 578                                         [],
 579                                         [ 'oldid' => $firstRev->getId() ]
 580                                 )
 581                         ];
 582                 }
 583
 584                 if ( $lastRev ) {
 585                         // Latest editor
 586                         $pageInfo['header-edits'][] = [
 587                                 $this->msg( 'pageinfo-lastuser' ),
 588                                 Linker::revUserTools( $lastRev )
 589                         ];
 590
 591                         // Date of latest edit
 592                         $pageInfo['header-edits'][] = [
 593                                 $this->msg( 'pageinfo-lasttime' ),
 594                                 $linkRenderer->makeKnownLink(
 595                                         $title,
 596                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 597                                         [],
 598                                         [ 'oldid' => $this->page->getLatest() ]
 599                                 )
 600                         ];
 601                 }
 602
 603                 // Total number of edits
 604                 $pageInfo['header-edits'][] = [
 605                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 606                 ];
 607
 608                 // Total number of distinct authors
 609                 if ( $pageCounts['authors'] > 0 ) {
 610                         $pageInfo['header-edits'][] = [
 611                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 612                         ];
 613                 }
 614
 615                 // Recent number of edits (within past 30 days)
 616                 $pageInfo['header-edits'][] = [
 617                         $this->msg( 'pageinfo-recent-edits',
 618                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 619                         $lang->formatNum( $pageCounts['recent_edits'] )
 620                 ];
 621
 622                 // Recent number of distinct authors
 623                 $pageInfo['header-edits'][] = [
 624                         $this->msg( 'pageinfo-recent-authors' ),
 625                         $lang->formatNum( $pageCounts['recent_authors'] )
 626                 ];
 627
 628                 // Array of MagicWord objects
 629                 $magicWords = $services->getMagicWordFactory()->getDoubleUnderscoreArray();
 630
 631                 // Array of magic word IDs
 632                 $wordIDs = $magicWords->names;
 633
 634                 // Array of IDs => localized magic words
 635                 $localizedWords = $services->getContentLanguage()->getMagicWords();
 636
 637                 $listItems = [];
 638                 foreach ( $pageProperties as $property => $value ) {
 639                         if ( in_array( $property, $wordIDs ) ) {
 640                                 $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
 641                         }
 642                 }
 643
 644                 $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
 645                 $hiddenCategories = $this->page->getHiddenCategories();
 646
 647                 if (
 648                         count( $listItems ) > 0 ||
 649                         count( $hiddenCategories ) > 0 ||
 650                         $pageCounts['transclusion']['from'] > 0 ||
 651                         $pageCounts['transclusion']['to'] > 0
 652                 ) {
 653                         $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
 654                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 655                         if ( $config->get( 'MiserMode' ) ) {
 656                                 $transcludedTargets = [];
 657                         } else {
 658                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 659                         }
 660
 661                         // Page properties
 662                         $pageInfo['header-properties'] = [];
 663
 664                         // Magic words
 665                         if ( count( $listItems ) > 0 ) {
 666                                 $pageInfo['header-properties'][] = [
 667                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 668                                         $localizedList
 669                                 ];
 670                         }
 671
 672                         // Hidden categories
 673                         if ( count( $hiddenCategories ) > 0 ) {
 674                                 $pageInfo['header-properties'][] = [
 675                                         $this->msg( 'pageinfo-hidden-categories' )
 676                                                 ->numParams( count( $hiddenCategories ) ),
 677                                         Linker::formatHiddenCategories( $hiddenCategories )
 678                                 ];
 679                         }
 680
 681                         // Transcluded templates
 682                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 683                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 684                                         $more = $this->msg( 'morenotlisted' )->escaped();
 685                                 } else {
 686                                         $more = null;
 687                                 }
 688
 689                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 690                                         $this->getContext(),
 691                                         $linkRenderer
 692                                 );
 693
 694                                 $pageInfo['header-properties'][] = [
 695                                         $this->msg( 'pageinfo-templates' )
 696                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 697                                         $templateListFormatter->format( $transcludedTemplates, false, $more )
 698                                 ];
 699                         }
 700
 701                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 702                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 703                                         $more = $linkRenderer->makeLink(
 704                                                 $whatLinksHere,
 705                                                 $this->msg( 'moredotdotdot' )->text(),
 706                                                 [],
 707                                                 [ 'hidelinks' => 1, 'hideredirs' => 1 ]
 708                                         );
 709                                 } else {
 710                                         $more = null;
 711                                 }
 712
 713                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 714                                         $this->getContext(),
 715                                         $linkRenderer
 716                                 );
 717
 718                                 $pageInfo['header-properties'][] = [
 719                                         $this->msg( 'pageinfo-transclusions' )
 720                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 721                                         $templateListFormatter->format( $transcludedTargets, false, $more )
 722                                 ];
 723                         }
 724                 }
 725
 726                 return $pageInfo;
 727         }
 728
 729         /**
 730          * Returns page counts that would be too "expensive" to retrieve by normal means.
 731          *
 732          * @param WikiPage|Article|Page $page
 733          * @return array
 734          */
 735         protected function pageCounts( Page $page ) {
 736                 $fname = __METHOD__;
 737                 $config = $this->context->getConfig();
 738                 $services = MediaWikiServices::getInstance();
 739                 $cache = $services->getMainWANObjectCache();
 740
 741                 return $cache->getWithSetCallback(
 742                         self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
 743                         WANObjectCache::TTL_WEEK,
 744                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname, $services ) {
 745                                 global $wgActorTableSchemaMigrationStage;
 746
 747                                 $title = $page->getTitle();
 748                                 $id = $title->getArticleID();
 749
 750                                 $dbr = wfGetDB( DB_REPLICA );
 751                                 $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
 752                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 753
 754                                 if ( $wgActorTableSchemaMigrationStage & SCHEMA_COMPAT_READ_NEW ) {
 755                                         $tables = [ 'revision_actor_temp' ];
 756                                         $field = 'revactor_actor';
 757                                         $pageField = 'revactor_page';
 758                                         $tsField = 'revactor_timestamp';
 759                                         $joins = [];
 760                                 } else {
 761                                         $tables = [ 'revision' ];
 762                                         $field = 'rev_user_text';
 763                                         $pageField = 'rev_page';
 764                                         $tsField = 'rev_timestamp';
 765                                         $joins = [];
 766                                 }
 767
 768                                 $watchedItemStore = $services->getWatchedItemStore();
 769
 770                                 $result = [];
 771                                 $result['watchers'] = $watchedItemStore->countWatchers( $title );
 772
 773                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 774                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 775                                         $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
 776                                                 $title,
 777                                                 $updated - $config->get( 'WatchersMaxAge' )
 778                                         );
 779                                 }
 780
 781                                 // Total number of edits
 782                                 $edits = (int)$dbr->selectField(
 783                                         'revision',
 784                                         'COUNT(*)',
 785                                         [ 'rev_page' => $id ],
 786                                         $fname
 787                                 );
 788                                 $result['edits'] = $edits;
 789
 790                                 // Total number of distinct authors
 791                                 if ( $config->get( 'MiserMode' ) ) {
 792                                         $result['authors'] = 0;
 793                                 } else {
 794                                         $result['authors'] = (int)$dbr->selectField(
 795                                                 $tables,
 796                                                 "COUNT(DISTINCT $field)",
 797                                                 [ $pageField => $id ],
 798                                                 $fname,
 799                                                 [],
 800                                                 $joins
 801                                         );
 802                                 }
 803
 804                                 // "Recent" threshold defined by RCMaxAge setting
 805                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 806
 807                                 // Recent number of edits
 808                                 $edits = (int)$dbr->selectField(
 809                                         'revision',
 810                                         'COUNT(rev_page)',
 811                                         [
 812                                                 'rev_page' => $id,
 813                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 814                                         ],
 815                                         $fname
 816                                 );
 817                                 $result['recent_edits'] = $edits;
 818
 819                                 // Recent number of distinct authors
 820                                 $result['recent_authors'] = (int)$dbr->selectField(
 821                                         $tables,
 822                                         "COUNT(DISTINCT $field)",
 823                                         [
 824                                                 $pageField => $id,
 825                                                 "$tsField >= " . $dbr->addQuotes( $threshold )
 826                                         ],
 827                                         $fname,
 828                                         [],
 829                                         $joins
 830                                 );
 831
 832                                 // Subpages (if enabled)
 833                                 if ( $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() ) ) {
 834                                         $conds = [ 'page_namespace' => $title->getNamespace() ];
 835                                         $conds[] = 'page_title ' .
 836                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 837
 838                                         // Subpages of this page (redirects)
 839                                         $conds['page_is_redirect'] = 1;
 840                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 841                                                 'page',
 842                                                 'COUNT(page_id)',
 843                                                 $conds,
 844                                                 $fname
 845                                         );
 846
 847                                         // Subpages of this page (non-redirects)
 848                                         $conds['page_is_redirect'] = 0;
 849                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 850                                                 'page',
 851                                                 'COUNT(page_id)',
 852                                                 $conds,
 853                                                 $fname
 854                                         );
 855
 856                                         // Subpages of this page (total)
 857                                         $result['subpages']['total'] = $result['subpages']['redirects']
 858                                                 + $result['subpages']['nonredirects'];
 859                                 }
 860
 861                                 // Counts for the number of transclusion links (to/from)
 862                                 if ( $config->get( 'MiserMode' ) ) {
 863                                         $result['transclusion']['to'] = 0;
 864                                 } else {
 865                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 866                                                 'templatelinks',
 867                                                 'COUNT(tl_from)',
 868                                                 [
 869                                                         'tl_namespace' => $title->getNamespace(),
 870                                                         'tl_title' => $title->getDBkey()
 871                                                 ],
 872                                                 $fname
 873                                         );
 874                                 }
 875
 876                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 877                                         'templatelinks',
 878                                         'COUNT(*)',
 879                                         [ 'tl_from' => $title->getArticleID() ],
 880                                         $fname
 881                                 );
 882
 883                                 return $result;
 884                         }
 885                 );
 886         }
 887
 888         /**
 889          * Returns the name that goes in the "<h1>" page title.
 890          *
 891          * @return string
 892          */
 893         protected function getPageTitle() {
 894                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 895         }
 896
 897         /**
 898          * Get a list of contributors of $article
 899          * @return string Html
 900          */
 901         protected function getContributors() {
 902                 $contributors = $this->page->getContributors();
 903                 $real_names = [];
 904                 $user_names = [];
 905                 $anon_ips = [];
 906                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 907
 908                 # Sift for real versus user names
 909                 /** @var User $user */
 910                 foreach ( $contributors as $user ) {
 911                         $page = $user->isAnon()
 912                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 913                                 : $user->getUserPage();
 914
 915                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 916                         if ( $user->getId() == 0 ) {
 917                                 $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
 918                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 919                                 $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
 920                         } else {
 921                                 $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
 922                         }
 923                 }
 924
 925                 $lang = $this->getLanguage();
 926
 927                 $real = $lang->listToText( $real_names );
 928
 929                 # "ThisSite user(s) A, B and C"
 930                 if ( count( $user_names ) ) {
 931                         $user = $this->msg( 'siteusers' )
 932                                 ->rawParams( $lang->listToText( $user_names ) )
 933                                 ->params( count( $user_names ) )->escaped();
 934                 } else {
 935                         $user = false;
 936                 }
 937
 938                 if ( count( $anon_ips ) ) {
 939                         $anon = $this->msg( 'anonusers' )
 940                                 ->rawParams( $lang->listToText( $anon_ips ) )
 941                                 ->params( count( $anon_ips ) )->escaped();
 942                 } else {
 943                         $anon = false;
 944                 }
 945
 946                 # This is the big list, all mooshed together. We sift for blank strings
 947                 $fulllist = [];
 948                 foreach ( [ $real, $user, $anon ] as $s ) {
 949                         if ( $s !== '' ) {
 950                                 array_push( $fulllist, $s );
 951                         }
 952                 }
 953
 954                 $count = count( $fulllist );
 955
 956                 # "Based on work by ..."
 957                 return $count
 958                         ? $this->msg( 'othercontribs' )->rawParams(
 959                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 960                         : '';
 961         }
 962
 963         /**
 964          * Returns the description that goes below the "<h1>" tag.
 965          *
 966          * @return string
 967          */
 968         protected function getDescription() {
 969                 return '';
 970         }
 971
 972         /**
 973          * @param WANObjectCache $cache
 974          * @param Title $title
 975          * @param int $revId
 976          * @return string
 977          */
 978         protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
 979                 return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 980         }
 981 }