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