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