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