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 MediaWiki\Storage\RevisionRecord;
  27 use Wikimedia\Rdbms\Database;
  28
  29 /**
  30  * Displays information about a page.
  31  *
  32  * @ingroup Actions
  33  */
  34 class InfoAction extends FormlessAction {
  35         const VERSION = 1;
  36
  37         /**
  38          * Returns the name of the action this object responds to.
  39          *
  40          * @return string Lowercase name
  41          */
  42         public function getName() {
  43                 return 'info';
  44         }
  45
  46         /**
  47          * Whether this action can still be executed by a blocked user.
  48          *
  49          * @return bool
  50          */
  51         public function requiresUnblock() {
  52                 return false;
  53         }
  54
  55         /**
  56          * Whether this action requires the wiki not to be locked.
  57          *
  58          * @return bool
  59          */
  60         public function requiresWrite() {
  61                 return false;
  62         }
  63
  64         /**
  65          * Clear the info cache for a given Title.
  66          *
  67          * @since 1.22
  68          * @param Title $title Title to clear cache for
  69          * @param int|null $revid Revision id to clear
  70          */
  71         public static function invalidateCache( Title $title, $revid = null ) {
  72                 if ( !$revid ) {
  73                         $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
  74                         $revid = $revision ? $revision->getId() : null;
  75                 }
  76                 if ( $revid !== null ) {
  77                         $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
  78                         $key = self::getCacheKey( $cache, $title, $revid );
  79                         $cache->delete( $key );
  80                 }
  81         }
  82
  83         /**
  84          * Shows page information on GET request.
  85          *
  86          * @return string Page information that will be added to the output
  87          */
  88         public function onView() {
  89                 $content = '';
  90
  91                 // Validate revision
  92                 $oldid = $this->page->getOldID();
  93                 if ( $oldid ) {
  94                         $revision = $this->page->getRevisionFetched();
  95
  96                         // Revision is missing
  97                         if ( $revision === null ) {
  98                                 return $this->msg( 'missing-revision', $oldid )->parse();
  99                         }
 100
 101                         // Revision is not current
 102                         if ( !$revision->isCurrent() ) {
 103                                 return $this->msg( 'pageinfo-not-current' )->plain();
 104                         }
 105                 }
 106
 107                 // "Help" button
 108                 $this->addHelpLink( 'Page information' );
 109
 110                 // Page header
 111                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 112                         $content .= $this->msg( 'pageinfo-header' )->parse();
 113                 }
 114
 115                 // Hide "This page is a member of # hidden categories" explanation
 116                 $content .= Html::element( 'style', [],
 117                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 118
 119                 // Hide "Templates used on this page" explanation
 120                 $content .= Html::element( 'style', [],
 121                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 122
 123                 // Get page information
 124                 $pageInfo = $this->pageInfo();
 125
 126                 // Allow extensions to add additional information
 127                 Hooks::run( 'InfoAction', [ $this->getContext(), &$pageInfo ] );
 128
 129                 // Render page information
 130                 foreach ( $pageInfo as $header => $infoTable ) {
 131                         // Messages:
 132                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 133                         // pageinfo-header-properties, pageinfo-category-info
 134                         $content .= $this->makeHeader(
 135                                 $this->msg( "pageinfo-${header}" )->text(),
 136                                 "mw-pageinfo-${header}"
 137                         ) . "\n";
 138                         $table = "\n";
 139                         $below = "";
 140                         foreach ( $infoTable as $infoRow ) {
 141                                 if ( $infoRow[0] == "below" ) {
 142                                         $below = $infoRow[1] . "\n";
 143                                         continue;
 144                                 }
 145                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 146                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 147                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 148                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 149                         }
 150                         $content = $this->addTable( $content, $table ) . "\n" . $below;
 151                 }
 152
 153                 // Page footer
 154                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 155                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 156                 }
 157
 158                 return $content;
 159         }
 160
 161         /**
 162          * Creates a header that can be added to the output.
 163          *
 164          * @param string $header The header text.
 165          * @param string $canonicalId
 166          * @return string The HTML.
 167          */
 168         protected function makeHeader( $header, $canonicalId ) {
 169                 $spanAttribs = [ 'class' => 'mw-headline', 'id' => Sanitizer::escapeIdForAttribute( $header ) ];
 170                 $h2Attribs = [ 'id' => Sanitizer::escapeIdForAttribute( $canonicalId ) ];
 171
 172                 return Html::rawElement( 'h2', $h2Attribs, Html::element( 'span', $spanAttribs, $header ) );
 173         }
 174
 175         /**
 176          * Adds a row to a table that will be added to the content.
 177          *
 178          * @param string $table The table that will be added to the content
 179          * @param string $name The name of the row
 180          * @param string $value The value of the row
 181          * @param string|null $id The ID to use for the 'tr' element
 182          * @return string The table with the row added
 183          */
 184         protected function addRow( $table, $name, $value, $id ) {
 185                 return $table .
 186                         Html::rawElement(
 187                                 'tr',
 188                                 $id === null ? [] : [ 'id' => 'mw-' . $id ],
 189                                 Html::rawElement( 'td', [ 'style' => 'vertical-align: top;' ], $name ) .
 190                                         Html::rawElement( 'td', [], $value )
 191                         );
 192         }
 193
 194         /**
 195          * Adds a table to the content that will be added to the output.
 196          *
 197          * @param string $content The content that will be added to the output
 198          * @param string $table
 199          * @return string The content with the table added
 200          */
 201         protected function addTable( $content, $table ) {
 202                 return $content . Html::rawElement( 'table', [ 'class' => 'wikitable mw-page-info' ],
 203                         $table );
 204         }
 205
 206         /**
 207          * Returns an array of info groups (will be rendered as tables), keyed by group ID.
 208          * Group IDs are arbitrary and used so that extensions may add additional information in
 209          * arbitrary positions (and as message keys for section headers for the tables, prefixed
 210          * with 'pageinfo-').
 211          * Each info group is a non-associative array of info items (rendered as table rows).
 212          * Each info item is an array with two elements: the first describes the type of
 213          * information, the second the value for the current page. Both can be strings (will be
 214          * interpreted as raw HTML) or messages (will be interpreted as plain text and escaped).
 215          *
 216          * @return array
 217          */
 218         protected function pageInfo() {
 219                 $services = MediaWikiServices::getInstance();
 220
 221                 $user = $this->getUser();
 222                 $lang = $this->getLanguage();
 223                 $title = $this->getTitle();
 224                 $id = $title->getArticleID();
 225                 $config = $this->context->getConfig();
 226                 $linkRenderer = $services->getLinkRenderer();
 227
 228                 $pageCounts = $this->pageCounts( $this->page );
 229
 230                 $props = PageProps::getInstance()->getAllProperties( $title );
 231                 $pageProperties = $props[$id] ?? [];
 232
 233                 // Basic information
 234                 $pageInfo = [];
 235                 $pageInfo['header-basic'] = [];
 236
 237                 // Display title
 238                 $displayTitle = $pageProperties['displaytitle'] ?? $title->getPrefixedText();
 239
 240                 $pageInfo['header-basic'][] = [
 241                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 242                 ];
 243
 244                 // Is it a redirect? If so, where to?
 245                 $redirectTarget = $this->page->getRedirectTarget();
 246                 if ( $redirectTarget !== null ) {
 247                         $pageInfo['header-basic'][] = [
 248                                 $this->msg( 'pageinfo-redirectsto' ),
 249                                 $linkRenderer->makeLink( $redirectTarget ) .
 250                                 $this->msg( 'word-separator' )->escaped() .
 251                                 $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 252                                         $redirectTarget,
 253                                         $this->msg( 'pageinfo-redirectsto-info' )->text(),
 254                                         [],
 255                                         [ 'action' => 'info' ]
 256                                 ) )->escaped()
 257                         ];
 258                 }
 259
 260                 // Default sort key
 261                 $sortKey = $pageProperties['defaultsort'] ?? $title->getCategorySortkey();
 262
 263                 $sortKey = htmlspecialchars( $sortKey );
 264                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-default-sort' ), $sortKey ];
 265
 266                 // Page length (in bytes)
 267                 $pageInfo['header-basic'][] = [
 268                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 269                 ];
 270
 271                 // Page namespace
 272                 $pageNamespace = $title->getNsText();
 273                 if ( $pageNamespace ) {
 274                         $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-namespace' ), $pageNamespace ];
 275                 }
 276
 277                 // Page ID (number not localised, as it's a database ID)
 278                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-article-id' ), $id ];
 279
 280                 // Language in which the page content is (supposed to be) written
 281                 $pageLang = $title->getPageLanguage()->getCode();
 282
 283                 $permissionManager = $services->getPermissionManager();
 284
 285                 $pageLangHtml = $pageLang . ' - ' .
 286                         Language::fetchLanguageName( $pageLang, $lang->getCode() );
 287                 // Link to Special:PageLanguage with pre-filled page title if user has permissions
 288                 if ( $config->get( 'PageLanguageUseDB' )
 289                         && $permissionManager->userCan( 'pagelang', $user, $title )
 290                 ) {
 291                         $pageLangHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 292                                 SpecialPage::getTitleValueFor( 'PageLanguage', $title->getPrefixedText() ),
 293                                 $this->msg( 'pageinfo-language-change' )->text()
 294                         ) )->escaped();
 295                 }
 296
 297                 $pageInfo['header-basic'][] = [
 298                         $this->msg( 'pageinfo-language' )->escaped(),
 299                         $pageLangHtml
 300                 ];
 301
 302                 // Content model of the page
 303                 $modelHtml = htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) );
 304                 // If the user can change it, add a link to Special:ChangeContentModel
 305                 if ( $config->get( 'ContentHandlerUseDB' )
 306                         && $permissionManager->userCan( 'editcontentmodel', $user, $title )
 307                 ) {
 308                         $modelHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 309                                 SpecialPage::getTitleValueFor( 'ChangeContentModel', $title->getPrefixedText() ),
 310                                 $this->msg( 'pageinfo-content-model-change' )->text()
 311                         ) )->escaped();
 312                 }
 313
 314                 $pageInfo['header-basic'][] = [
 315                         $this->msg( 'pageinfo-content-model' ),
 316                         $modelHtml
 317                 ];
 318
 319                 if ( $title->inNamespace( NS_USER ) ) {
 320                         $pageUser = User::newFromName( $title->getRootText() );
 321                         if ( $pageUser && $pageUser->getId() && !$pageUser->isHidden() ) {
 322                                 $pageInfo['header-basic'][] = [
 323                                         $this->msg( 'pageinfo-user-id' ),
 324                                         $pageUser->getId()
 325                                 ];
 326                         }
 327                 }
 328
 329                 // Search engine status
 330                 $pOutput = new ParserOutput();
 331                 if ( isset( $pageProperties['noindex'] ) ) {
 332                         $pOutput->setIndexPolicy( 'noindex' );
 333                 }
 334                 if ( isset( $pageProperties['index'] ) ) {
 335                         $pOutput->setIndexPolicy( 'index' );
 336                 }
 337
 338                 // Use robot policy logic
 339                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 340                 $pageInfo['header-basic'][] = [
 341                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 342                         $this->msg( 'pageinfo-robot-policy' ),
 343                         $this->msg( "pageinfo-robot-${policy['index']}" )
 344                 ];
 345
 346                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 347                 if (
 348                         $services->getPermissionManager()->userHasRight( $user, 'unwatchedpages' ) ||
 349                         ( $unwatchedPageThreshold !== false &&
 350                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 351                 ) {
 352                         // Number of page watchers
 353                         $pageInfo['header-basic'][] = [
 354                                 $this->msg( 'pageinfo-watchers' ),
 355                                 $lang->formatNum( $pageCounts['watchers'] )
 356                         ];
 357                         if (
 358                                 $config->get( 'ShowUpdatedMarker' ) &&
 359                                 isset( $pageCounts['visitingWatchers'] )
 360                         ) {
 361                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 362                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 363                                         $services->getPermissionManager()->userHasRight( $user, 'unwatchedpages' ) ) {
 364                                         $pageInfo['header-basic'][] = [
 365                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 366                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 367                                         ];
 368                                 } else {
 369                                         $pageInfo['header-basic'][] = [
 370                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 371                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 372                                         ];
 373                                 }
 374                         }
 375                 } elseif ( $unwatchedPageThreshold !== false ) {
 376                         $pageInfo['header-basic'][] = [
 377                                 $this->msg( 'pageinfo-watchers' ),
 378                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 379                         ];
 380                 }
 381
 382                 // Redirects to this page
 383                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 384                 $pageInfo['header-basic'][] = [
 385                         $linkRenderer->makeLink(
 386                                 $whatLinksHere,
 387                                 $this->msg( 'pageinfo-redirects-name' )->text(),
 388                                 [],
 389                                 [
 390                                         'hidelinks' => 1,
 391                                         'hidetrans' => 1,
 392                                         'hideimages' => $title->getNamespace() == NS_FILE
 393                                 ]
 394                         ),
 395                         $this->msg( 'pageinfo-redirects-value' )
 396                                 ->numParams( count( $title->getRedirectsHere() ) )
 397                 ];
 398
 399                 // Is it counted as a content page?
 400                 if ( $this->page->isCountable() ) {
 401                         $pageInfo['header-basic'][] = [
 402                                 $this->msg( 'pageinfo-contentpage' ),
 403                                 $this->msg( 'pageinfo-contentpage-yes' )
 404                         ];
 405                 }
 406
 407                 // Subpages of this page, if subpages are enabled for the current NS
 408                 if ( $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() ) ) {
 409                         $prefixIndex = SpecialPage::getTitleFor(
 410                                 'Prefixindex', $title->getPrefixedText() . '/' );
 411                         $pageInfo['header-basic'][] = [
 412                                 $linkRenderer->makeLink(
 413                                         $prefixIndex,
 414                                         $this->msg( 'pageinfo-subpages-name' )->text()
 415                                 ),
 416                                 $this->msg( 'pageinfo-subpages-value' )
 417                                         ->numParams(
 418                                                 $pageCounts['subpages']['total'],
 419                                                 $pageCounts['subpages']['redirects'],
 420                                                 $pageCounts['subpages']['nonredirects'] )
 421                         ];
 422                 }
 423
 424                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 425                         $category = Category::newFromTitle( $title );
 426
 427                         // $allCount is the total number of cat members,
 428                         // not the count of how many members are normal pages.
 429                         $allCount = (int)$category->getPageCount();
 430                         $subcatCount = (int)$category->getSubcatCount();
 431                         $fileCount = (int)$category->getFileCount();
 432                         $pagesCount = $allCount - $subcatCount - $fileCount;
 433
 434                         $pageInfo['category-info'] = [
 435                                 [
 436                                         $this->msg( 'pageinfo-category-total' ),
 437                                         $lang->formatNum( $allCount )
 438                                 ],
 439                                 [
 440                                         $this->msg( 'pageinfo-category-pages' ),
 441                                         $lang->formatNum( $pagesCount )
 442                                 ],
 443                                 [
 444                                         $this->msg( 'pageinfo-category-subcats' ),
 445                                         $lang->formatNum( $subcatCount )
 446                                 ],
 447                                 [
 448                                         $this->msg( 'pageinfo-category-files' ),
 449                                         $lang->formatNum( $fileCount )
 450                                 ]
 451                         ];
 452                 }
 453
 454                 // Display image SHA-1 value
 455                 if ( $title->inNamespace( NS_FILE ) ) {
 456                         $fileObj = $services->getRepoGroup()->findFile( $title );
 457                         if ( $fileObj !== false ) {
 458                                 // Convert the base-36 sha1 value obtained from database to base-16
 459                                 $output = Wikimedia\base_convert( $fileObj->getSha1(), 36, 16, 40 );
 460                                 $pageInfo['header-basic'][] = [
 461                                         $this->msg( 'pageinfo-file-hash' ),
 462                                         $output
 463                                 ];
 464                         }
 465                 }
 466
 467                 // Page protection
 468                 $pageInfo['header-restrictions'] = [];
 469
 470                 // Is this page affected by the cascading protection of something which includes it?
 471                 if ( $title->isCascadeProtected() ) {
 472                         $cascadingFrom = '';
 473                         $sources = $title->getCascadeProtectionSources()[0];
 474
 475                         foreach ( $sources as $sourceTitle ) {
 476                                 $cascadingFrom .= Html::rawElement(
 477                                         'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
 478                         }
 479
 480                         $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
 481                         $pageInfo['header-restrictions'][] = [
 482                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 483                                 $cascadingFrom
 484                         ];
 485                 }
 486
 487                 // Is out protection set to cascade to other pages?
 488                 if ( $title->areRestrictionsCascading() ) {
 489                         $pageInfo['header-restrictions'][] = [
 490                                 $this->msg( 'pageinfo-protect-cascading' ),
 491                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 492                         ];
 493                 }
 494
 495                 // Page protection
 496                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 497                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 498
 499                         if ( $protectionLevel == '' ) {
 500                                 // Allow all users
 501                                 $message = $this->msg( 'protect-default' )->escaped();
 502                         } else {
 503                                 // Administrators only
 504                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 505                                 $message = $this->msg( "protect-level-$protectionLevel" );
 506                                 if ( $message->isDisabled() ) {
 507                                         // Require "$1" permission
 508                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 509                                 } else {
 510                                         $message = $message->escaped();
 511                                 }
 512                         }
 513                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 514                         $formattedexpiry = $this->msg( 'parentheses',
 515                                 $lang->formatExpiry( $expiry ) )->escaped();
 516                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 517
 518                         // Messages: restriction-edit, restriction-move, restriction-create,
 519                         // restriction-upload
 520                         $pageInfo['header-restrictions'][] = [
 521                                 $this->msg( "restriction-$restrictionType" ), $message
 522                         ];
 523                 }
 524                 $protectLog = SpecialPage::getTitleFor( 'Log' );
 525                 $pageInfo['header-restrictions'][] = [
 526                         'below',
 527                         $linkRenderer->makeKnownLink(
 528                                 $protectLog,
 529                                 $this->msg( 'pageinfo-view-protect-log' )->text(),
 530                                 [],
 531                                 [ 'type' => 'protect', 'page' => $title->getPrefixedText() ]
 532                         ),
 533                 ];
 534
 535                 if ( !$this->page->exists() ) {
 536                         return $pageInfo;
 537                 }
 538
 539                 // Edit history
 540                 $pageInfo['header-edits'] = [];
 541
 542                 $firstRev = $this->page->getOldestRevision();
 543                 $lastRev = $this->page->getRevision();
 544                 $batch = new LinkBatch;
 545
 546                 if ( $firstRev ) {
 547                         $firstRevUser = $firstRev->getUserText( RevisionRecord::FOR_THIS_USER );
 548                         if ( $firstRevUser !== '' ) {
 549                                 $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
 550                                 $batch->addObj( $firstRevUserTitle );
 551                                 $batch->addObj( $firstRevUserTitle->getTalkPage() );
 552                         }
 553                 }
 554
 555                 if ( $lastRev ) {
 556                         $lastRevUser = $lastRev->getUserText( RevisionRecord::FOR_THIS_USER );
 557                         if ( $lastRevUser !== '' ) {
 558                                 $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
 559                                 $batch->addObj( $lastRevUserTitle );
 560                                 $batch->addObj( $lastRevUserTitle->getTalkPage() );
 561                         }
 562                 }
 563
 564                 $batch->execute();
 565
 566                 if ( $firstRev ) {
 567                         // Page creator
 568                         $pageInfo['header-edits'][] = [
 569                                 $this->msg( 'pageinfo-firstuser' ),
 570                                 Linker::revUserTools( $firstRev )
 571                         ];
 572
 573                         // Date of page creation
 574                         $pageInfo['header-edits'][] = [
 575                                 $this->msg( 'pageinfo-firsttime' ),
 576                                 $linkRenderer->makeKnownLink(
 577                                         $title,
 578                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 579                                         [],
 580                                         [ 'oldid' => $firstRev->getId() ]
 581                                 )
 582                         ];
 583                 }
 584
 585                 if ( $lastRev ) {
 586                         // Latest editor
 587                         $pageInfo['header-edits'][] = [
 588                                 $this->msg( 'pageinfo-lastuser' ),
 589                                 Linker::revUserTools( $lastRev )
 590                         ];
 591
 592                         // Date of latest edit
 593                         $pageInfo['header-edits'][] = [
 594                                 $this->msg( 'pageinfo-lasttime' ),
 595                                 $linkRenderer->makeKnownLink(
 596                                         $title,
 597                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 598                                         [],
 599                                         [ 'oldid' => $this->page->getLatest() ]
 600                                 )
 601                         ];
 602                 }
 603
 604                 // Total number of edits
 605                 $pageInfo['header-edits'][] = [
 606                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 607                 ];
 608
 609                 // Total number of distinct authors
 610                 if ( $pageCounts['authors'] > 0 ) {
 611                         $pageInfo['header-edits'][] = [
 612                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 613                         ];
 614                 }
 615
 616                 // Recent number of edits (within past 30 days)
 617                 $pageInfo['header-edits'][] = [
 618                         $this->msg( 'pageinfo-recent-edits',
 619                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 620                         $lang->formatNum( $pageCounts['recent_edits'] )
 621                 ];
 622
 623                 // Recent number of distinct authors
 624                 $pageInfo['header-edits'][] = [
 625                         $this->msg( 'pageinfo-recent-authors' ),
 626                         $lang->formatNum( $pageCounts['recent_authors'] )
 627                 ];
 628
 629                 // Array of MagicWord objects
 630                 $magicWords = $services->getMagicWordFactory()->getDoubleUnderscoreArray();
 631
 632                 // Array of magic word IDs
 633                 $wordIDs = $magicWords->names;
 634
 635                 // Array of IDs => localized magic words
 636                 $localizedWords = $services->getContentLanguage()->getMagicWords();
 637
 638                 $listItems = [];
 639                 foreach ( $pageProperties as $property => $value ) {
 640                         if ( in_array( $property, $wordIDs ) ) {
 641                                 $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
 642                         }
 643                 }
 644
 645                 $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
 646                 $hiddenCategories = $this->page->getHiddenCategories();
 647
 648                 if (
 649                         count( $listItems ) > 0 ||
 650                         count( $hiddenCategories ) > 0 ||
 651                         $pageCounts['transclusion']['from'] > 0 ||
 652                         $pageCounts['transclusion']['to'] > 0
 653                 ) {
 654                         $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
 655                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 656                         if ( $config->get( 'MiserMode' ) ) {
 657                                 $transcludedTargets = [];
 658                         } else {
 659                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 660                         }
 661
 662                         // Page properties
 663                         $pageInfo['header-properties'] = [];
 664
 665                         // Magic words
 666                         if ( count( $listItems ) > 0 ) {
 667                                 $pageInfo['header-properties'][] = [
 668                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 669                                         $localizedList
 670                                 ];
 671                         }
 672
 673                         // Hidden categories
 674                         if ( count( $hiddenCategories ) > 0 ) {
 675                                 $pageInfo['header-properties'][] = [
 676                                         $this->msg( 'pageinfo-hidden-categories' )
 677                                                 ->numParams( count( $hiddenCategories ) ),
 678                                         Linker::formatHiddenCategories( $hiddenCategories )
 679                                 ];
 680                         }
 681
 682                         // Transcluded templates
 683                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 684                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 685                                         $more = $this->msg( 'morenotlisted' )->escaped();
 686                                 } else {
 687                                         $more = null;
 688                                 }
 689
 690                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 691                                         $this->getContext(),
 692                                         $linkRenderer
 693                                 );
 694
 695                                 $pageInfo['header-properties'][] = [
 696                                         $this->msg( 'pageinfo-templates' )
 697                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 698                                         $templateListFormatter->format( $transcludedTemplates, false, $more )
 699                                 ];
 700                         }
 701
 702                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 703                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 704                                         $more = $linkRenderer->makeLink(
 705                                                 $whatLinksHere,
 706                                                 $this->msg( 'moredotdotdot' )->text(),
 707                                                 [],
 708                                                 [ 'hidelinks' => 1, 'hideredirs' => 1 ]
 709                                         );
 710                                 } else {
 711                                         $more = null;
 712                                 }
 713
 714                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 715                                         $this->getContext(),
 716                                         $linkRenderer
 717                                 );
 718
 719                                 $pageInfo['header-properties'][] = [
 720                                         $this->msg( 'pageinfo-transclusions' )
 721                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 722                                         $templateListFormatter->format( $transcludedTargets, false, $more )
 723                                 ];
 724                         }
 725                 }
 726
 727                 return $pageInfo;
 728         }
 729
 730         /**
 731          * Returns page counts that would be too "expensive" to retrieve by normal means.
 732          *
 733          * @param WikiPage|Article|Page $page
 734          * @return array
 735          */
 736         protected function pageCounts( Page $page ) {
 737                 $fname = __METHOD__;
 738                 $config = $this->context->getConfig();
 739                 $services = MediaWikiServices::getInstance();
 740                 $cache = $services->getMainWANObjectCache();
 741
 742                 return $cache->getWithSetCallback(
 743                         self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
 744                         WANObjectCache::TTL_WEEK,
 745                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname, $services ) {
 746                                 $title = $page->getTitle();
 747                                 $id = $title->getArticleID();
 748
 749                                 $dbr = wfGetDB( DB_REPLICA );
 750                                 $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
 751                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 752
 753                                 $tables = [ 'revision_actor_temp' ];
 754                                 $field = 'revactor_actor';
 755                                 $pageField = 'revactor_page';
 756                                 $tsField = 'revactor_timestamp';
 757                                 $joins = [];
 758
 759                                 $watchedItemStore = $services->getWatchedItemStore();
 760
 761                                 $result = [];
 762                                 $result['watchers'] = $watchedItemStore->countWatchers( $title );
 763
 764                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 765                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 766                                         $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
 767                                                 $title,
 768                                                 $updated - $config->get( 'WatchersMaxAge' )
 769                                         );
 770                                 }
 771
 772                                 // Total number of edits
 773                                 $edits = (int)$dbr->selectField(
 774                                         'revision',
 775                                         'COUNT(*)',
 776                                         [ 'rev_page' => $id ],
 777                                         $fname
 778                                 );
 779                                 $result['edits'] = $edits;
 780
 781                                 // Total number of distinct authors
 782                                 if ( $config->get( 'MiserMode' ) ) {
 783                                         $result['authors'] = 0;
 784                                 } else {
 785                                         $result['authors'] = (int)$dbr->selectField(
 786                                                 $tables,
 787                                                 "COUNT(DISTINCT $field)",
 788                                                 [ $pageField => $id ],
 789                                                 $fname,
 790                                                 [],
 791                                                 $joins
 792                                         );
 793                                 }
 794
 795                                 // "Recent" threshold defined by RCMaxAge setting
 796                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 797
 798                                 // Recent number of edits
 799                                 $edits = (int)$dbr->selectField(
 800                                         'revision',
 801                                         'COUNT(rev_page)',
 802                                         [
 803                                                 'rev_page' => $id,
 804                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 805                                         ],
 806                                         $fname
 807                                 );
 808                                 $result['recent_edits'] = $edits;
 809
 810                                 // Recent number of distinct authors
 811                                 $result['recent_authors'] = (int)$dbr->selectField(
 812                                         $tables,
 813                                         "COUNT(DISTINCT $field)",
 814                                         [
 815                                                 $pageField => $id,
 816                                                 "$tsField >= " . $dbr->addQuotes( $threshold )
 817                                         ],
 818                                         $fname,
 819                                         [],
 820                                         $joins
 821                                 );
 822
 823                                 // Subpages (if enabled)
 824                                 if ( $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() ) ) {
 825                                         $conds = [ 'page_namespace' => $title->getNamespace() ];
 826                                         $conds[] = 'page_title ' .
 827                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 828
 829                                         // Subpages of this page (redirects)
 830                                         $conds['page_is_redirect'] = 1;
 831                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 832                                                 'page',
 833                                                 'COUNT(page_id)',
 834                                                 $conds,
 835                                                 $fname
 836                                         );
 837
 838                                         // Subpages of this page (non-redirects)
 839                                         $conds['page_is_redirect'] = 0;
 840                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 841                                                 'page',
 842                                                 'COUNT(page_id)',
 843                                                 $conds,
 844                                                 $fname
 845                                         );
 846
 847                                         // Subpages of this page (total)
 848                                         $result['subpages']['total'] = $result['subpages']['redirects']
 849                                                 + $result['subpages']['nonredirects'];
 850                                 }
 851
 852                                 // Counts for the number of transclusion links (to/from)
 853                                 if ( $config->get( 'MiserMode' ) ) {
 854                                         $result['transclusion']['to'] = 0;
 855                                 } else {
 856                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 857                                                 'templatelinks',
 858                                                 'COUNT(tl_from)',
 859                                                 [
 860                                                         'tl_namespace' => $title->getNamespace(),
 861                                                         'tl_title' => $title->getDBkey()
 862                                                 ],
 863                                                 $fname
 864                                         );
 865                                 }
 866
 867                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 868                                         'templatelinks',
 869                                         'COUNT(*)',
 870                                         [ 'tl_from' => $title->getArticleID() ],
 871                                         $fname
 872                                 );
 873
 874                                 return $result;
 875                         }
 876                 );
 877         }
 878
 879         /**
 880          * Returns the name that goes in the "<h1>" page title.
 881          *
 882          * @return string
 883          */
 884         protected function getPageTitle() {
 885                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 886         }
 887
 888         /**
 889          * Get a list of contributors of $article
 890          * @return string Html
 891          */
 892         protected function getContributors() {
 893                 $contributors = $this->page->getContributors();
 894                 $real_names = [];
 895                 $user_names = [];
 896                 $anon_ips = [];
 897                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 898
 899                 # Sift for real versus user names
 900                 /** @var User $user */
 901                 foreach ( $contributors as $user ) {
 902                         $page = $user->isAnon()
 903                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 904                                 : $user->getUserPage();
 905
 906                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 907                         if ( $user->getId() == 0 ) {
 908                                 $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
 909                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 910                                 $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
 911                         } else {
 912                                 $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
 913                         }
 914                 }
 915
 916                 $lang = $this->getLanguage();
 917
 918                 $real = $lang->listToText( $real_names );
 919
 920                 # "ThisSite user(s) A, B and C"
 921                 if ( count( $user_names ) ) {
 922                         $user = $this->msg( 'siteusers' )
 923                                 ->rawParams( $lang->listToText( $user_names ) )
 924                                 ->params( count( $user_names ) )->escaped();
 925                 } else {
 926                         $user = false;
 927                 }
 928
 929                 if ( count( $anon_ips ) ) {
 930                         $anon = $this->msg( 'anonusers' )
 931                                 ->rawParams( $lang->listToText( $anon_ips ) )
 932                                 ->params( count( $anon_ips ) )->escaped();
 933                 } else {
 934                         $anon = false;
 935                 }
 936
 937                 # This is the big list, all mooshed together. We sift for blank strings
 938                 $fulllist = [];
 939                 foreach ( [ $real, $user, $anon ] as $s ) {
 940                         if ( $s !== '' ) {
 941                                 array_push( $fulllist, $s );
 942                         }
 943                 }
 944
 945                 $count = count( $fulllist );
 946
 947                 # "Based on work by ..."
 948                 return $count
 949                         ? $this->msg( 'othercontribs' )->rawParams(
 950                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 951                         : '';
 952         }
 953
 954         /**
 955          * Returns the description that goes below the "<h1>" tag.
 956          *
 957          * @return string
 958          */
 959         protected function getDescription() {
 960                 return '';
 961         }
 962
 963         /**
 964          * @param WANObjectCache $cache
 965          * @param Title $title
 966          * @param int $revId
 967          * @return string
 968          */
 969         protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
 970                 return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 971         }
 972 }