includes/actions/InfoAction.php

   1 <?php
   2 /**
   3  * Displays information about a page.
   4  *
   5  * Copyright © 2011 Alexandre Emsenhuber
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  * @file
  22  * @ingroup Actions
  23  */
  24
  25 use MediaWiki\MediaWikiServices;
  26 use Wikimedia\Rdbms\Database;
  27
  28 /**
  29  * Displays information about a page.
  30  *
  31  * @ingroup Actions
  32  */
  33 class InfoAction extends FormlessAction {
  34         const VERSION = 1;
  35
  36         /**
  37          * Returns the name of the action this object responds to.
  38          *
  39          * @return string Lowercase name
  40          */
  41         public function getName() {
  42                 return 'info';
  43         }
  44
  45         /**
  46          * Whether this action can still be executed by a blocked user.
  47          *
  48          * @return bool
  49          */
  50         public function requiresUnblock() {
  51                 return false;
  52         }
  53
  54         /**
  55          * Whether this action requires the wiki not to be locked.
  56          *
  57          * @return bool
  58          */
  59         public function requiresWrite() {
  60                 return false;
  61         }
  62
  63         /**
  64          * Clear the info cache for a given Title.
  65          *
  66          * @since 1.22
  67          * @param Title $title Title to clear cache for
  68          * @param int|null $revid Revision id to clear
  69          */
  70         public static function invalidateCache( Title $title, $revid = null ) {
  71                 if ( !$revid ) {
  72                         $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
  73                         $revid = $revision ? $revision->getId() : null;
  74                 }
  75                 if ( $revid !== null ) {
  76                         $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
  77                         $key = self::getCacheKey( $cache, $title, $revid );
  78                         $cache->delete( $key );
  79                 }
  80         }
  81
  82         /**
  83          * Shows page information on GET request.
  84          *
  85          * @return string Page information that will be added to the output
  86          */
  87         public function onView() {
  88                 $content = '';
  89
  90                 // Validate revision
  91                 $oldid = $this->page->getOldID();
  92                 if ( $oldid ) {
  93                         $revision = $this->page->getRevisionFetched();
  94
  95                         // Revision is missing
  96                         if ( $revision === null ) {
  97                                 return $this->msg( 'missing-revision', $oldid )->parse();
  98                         }
  99
 100                         // Revision is not current
 101                         if ( !$revision->isCurrent() ) {
 102                                 return $this->msg( 'pageinfo-not-current' )->plain();
 103                         }
 104                 }
 105
 106                 // "Help" button
 107                 $this->addHelpLink( 'Page information' );
 108
 109                 // Page header
 110                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 111                         $content .= $this->msg( 'pageinfo-header' )->parse();
 112                 }
 113
 114                 // Hide "This page is a member of # hidden categories" explanation
 115                 $content .= Html::element( 'style', [],
 116                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 117
 118                 // Hide "Templates used on this page" explanation
 119                 $content .= Html::element( 'style', [],
 120                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 121
 122                 // Get page information
 123                 $pageInfo = $this->pageInfo();
 124
 125                 // Allow extensions to add additional information
 126                 Hooks::run( 'InfoAction', [ $this->getContext(), &$pageInfo ] );
 127
 128                 // Render page information
 129                 foreach ( $pageInfo as $header => $infoTable ) {
 130                         // Messages:
 131                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 132                         // pageinfo-header-properties, pageinfo-category-info
 133                         $content .= $this->makeHeader(
 134                                 $this->msg( "pageinfo-${header}" )->text(),
 135                                 "mw-pageinfo-${header}"
 136                         ) . "\n";
 137                         $table = "\n";
 138                         $below = "";
 139                         foreach ( $infoTable as $infoRow ) {
 140                                 if ( $infoRow[0] == "below" ) {
 141                                         $below = $infoRow[1] . "\n";
 142                                         continue;
 143                                 }
 144                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 145                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 146                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 147                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 148                         }
 149                         $content = $this->addTable( $content, $table ) . "\n" . $below;
 150                 }
 151
 152                 // Page footer
 153                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 154                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 155                 }
 156
 157                 return $content;
 158         }
 159
 160         /**
 161          * Creates a header that can be added to the output.
 162          *
 163          * @param string $header The header text.
 164          * @param string $canonicalId
 165          * @return string The HTML.
 166          */
 167         protected function makeHeader( $header, $canonicalId ) {
 168                 $spanAttribs = [ 'class' => 'mw-headline', 'id' => Sanitizer::escapeIdForAttribute( $header ) ];
 169                 $h2Attribs = [ 'id' => Sanitizer::escapeIdForAttribute( $canonicalId ) ];
 170
 171                 return Html::rawElement( 'h2', $h2Attribs, Html::element( 'span', $spanAttribs, $header ) );
 172         }
 173
 174         /**
 175          * Adds a row to a table that will be added to the content.
 176          *
 177          * @param string $table The table that will be added to the content
 178          * @param string $name The name of the row
 179          * @param string $value The value of the row
 180          * @param string|null $id The ID to use for the 'tr' element
 181          * @return string The table with the row added
 182          */
 183         protected function addRow( $table, $name, $value, $id ) {
 184                 return $table .
 185                         Html::rawElement(
 186                                 'tr',
 187                                 $id === null ? [] : [ 'id' => 'mw-' . $id ],
 188                                 Html::rawElement( 'td', [ 'style' => 'vertical-align: top;' ], $name ) .
 189                                         Html::rawElement( 'td', [], $value )
 190                         );
 191         }
 192
 193         /**
 194          * Adds a table to the content that will be added to the output.
 195          *
 196          * @param string $content The content that will be added to the output
 197          * @param string $table
 198          * @return string The content with the table added
 199          */
 200         protected function addTable( $content, $table ) {
 201                 return $content . Html::rawElement( 'table', [ 'class' => 'wikitable mw-page-info' ],
 202                         $table );
 203         }
 204
 205         /**
 206          * Returns an array of info groups (will be rendered as tables), keyed by group ID.
 207          * Group IDs are arbitrary and used so that extensions may add additional information in
 208          * arbitrary positions (and as message keys for section headers for the tables, prefixed
 209          * with 'pageinfo-').
 210          * Each info group is a non-associative array of info items (rendered as table rows).
 211          * Each info item is an array with two elements: the first describes the type of
 212          * information, the second the value for the current page. Both can be strings (will be
 213          * interpreted as raw HTML) or messages (will be interpreted as plain text and escaped).
 214          *
 215          * @return array
 216          */
 217         protected function pageInfo() {
 218                 $services = MediaWikiServices::getInstance();
 219
 220                 $user = $this->getUser();
 221                 $lang = $this->getLanguage();
 222                 $title = $this->getTitle();
 223                 $id = $title->getArticleID();
 224                 $config = $this->context->getConfig();
 225                 $linkRenderer = $services->getLinkRenderer();
 226
 227                 $pageCounts = $this->pageCounts( $this->page );
 228
 229                 $props = PageProps::getInstance()->getAllProperties( $title );
 230                 $pageProperties = $props[$id] ?? [];
 231
 232                 // Basic information
 233                 $pageInfo = [];
 234                 $pageInfo['header-basic'] = [];
 235
 236                 // Display title
 237                 $displayTitle = $pageProperties['displaytitle'] ?? $title->getPrefixedText();
 238
 239                 $pageInfo['header-basic'][] = [
 240                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 241                 ];
 242
 243                 // Is it a redirect? If so, where to?
 244                 $redirectTarget = $this->page->getRedirectTarget();
 245                 if ( $redirectTarget !== null ) {
 246                         $pageInfo['header-basic'][] = [
 247                                 $this->msg( 'pageinfo-redirectsto' ),
 248                                 $linkRenderer->makeLink( $redirectTarget ) .
 249                                 $this->msg( 'word-separator' )->escaped() .
 250                                 $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 251                                         $redirectTarget,
 252                                         $this->msg( 'pageinfo-redirectsto-info' )->text(),
 253                                         [],
 254                                         [ 'action' => 'info' ]
 255                                 ) )->escaped()
 256                         ];
 257                 }
 258
 259                 // Default sort key
 260                 $sortKey = $pageProperties['defaultsort'] ?? $title->getCategorySortkey();
 261
 262                 $sortKey = htmlspecialchars( $sortKey );
 263                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-default-sort' ), $sortKey ];
 264
 265                 // Page length (in bytes)
 266                 $pageInfo['header-basic'][] = [
 267                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 268                 ];
 269
 270                 // Page namespace
 271                 $pageNamespace = $title->getNsText();
 272                 if ( $pageNamespace ) {
 273                         $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-namespace' ), $pageNamespace ];
 274                 }
 275
 276                 // Page ID (number not localised, as it's a database ID)
 277                 $pageInfo['header-basic'][] = [ $this->msg( 'pageinfo-article-id' ), $id ];
 278
 279                 // Language in which the page content is (supposed to be) written
 280                 $pageLang = $title->getPageLanguage()->getCode();
 281
 282                 $pageLangHtml = $pageLang . ' - ' .
 283                         Language::fetchLanguageName( $pageLang, $lang->getCode() );
 284                 // Link to Special:PageLanguage with pre-filled page title if user has permissions
 285                 if ( $config->get( 'PageLanguageUseDB' )
 286                         && $title->userCan( 'pagelang', $user )
 287                 ) {
 288                         $pageLangHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 289                                 SpecialPage::getTitleValueFor( 'PageLanguage', $title->getPrefixedText() ),
 290                                 $this->msg( 'pageinfo-language-change' )->text()
 291                         ) )->escaped();
 292                 }
 293
 294                 $pageInfo['header-basic'][] = [
 295                         $this->msg( 'pageinfo-language' )->escaped(),
 296                         $pageLangHtml
 297                 ];
 298
 299                 // Content model of the page
 300                 $modelHtml = htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) );
 301                 // If the user can change it, add a link to Special:ChangeContentModel
 302                 if ( $config->get( 'ContentHandlerUseDB' )
 303                         && $title->userCan( 'editcontentmodel', $user )
 304                 ) {
 305                         $modelHtml .= ' ' . $this->msg( 'parentheses' )->rawParams( $linkRenderer->makeLink(
 306                                 SpecialPage::getTitleValueFor( 'ChangeContentModel', $title->getPrefixedText() ),
 307                                 $this->msg( 'pageinfo-content-model-change' )->text()
 308                         ) )->escaped();
 309                 }
 310
 311                 $pageInfo['header-basic'][] = [
 312                         $this->msg( 'pageinfo-content-model' ),
 313                         $modelHtml
 314                 ];
 315
 316                 if ( $title->inNamespace( NS_USER ) ) {
 317                         $pageUser = User::newFromName( $title->getRootText() );
 318                         if ( $pageUser && $pageUser->getId() && !$pageUser->isHidden() ) {
 319                                 $pageInfo['header-basic'][] = [
 320                                         $this->msg( 'pageinfo-user-id' ),
 321                                         $pageUser->getId()
 322                                 ];
 323                         }
 324                 }
 325
 326                 // Search engine status
 327                 $pOutput = new ParserOutput();
 328                 if ( isset( $pageProperties['noindex'] ) ) {
 329                         $pOutput->setIndexPolicy( 'noindex' );
 330                 }
 331                 if ( isset( $pageProperties['index'] ) ) {
 332                         $pOutput->setIndexPolicy( 'index' );
 333                 }
 334
 335                 // Use robot policy logic
 336                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 337                 $pageInfo['header-basic'][] = [
 338                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 339                         $this->msg( 'pageinfo-robot-policy' ),
 340                         $this->msg( "pageinfo-robot-${policy['index']}" )
 341                 ];
 342
 343                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 344                 if (
 345                         $user->isAllowed( 'unwatchedpages' ) ||
 346                         ( $unwatchedPageThreshold !== false &&
 347                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 348                 ) {
 349                         // Number of page watchers
 350                         $pageInfo['header-basic'][] = [
 351                                 $this->msg( 'pageinfo-watchers' ),
 352                                 $lang->formatNum( $pageCounts['watchers'] )
 353                         ];
 354                         if (
 355                                 $config->get( 'ShowUpdatedMarker' ) &&
 356                                 isset( $pageCounts['visitingWatchers'] )
 357                         ) {
 358                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 359                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 360                                         $user->isAllowed( 'unwatchedpages' ) ) {
 361                                         $pageInfo['header-basic'][] = [
 362                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 363                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 364                                         ];
 365                                 } else {
 366                                         $pageInfo['header-basic'][] = [
 367                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 368                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 369                                         ];
 370                                 }
 371                         }
 372                 } elseif ( $unwatchedPageThreshold !== false ) {
 373                         $pageInfo['header-basic'][] = [
 374                                 $this->msg( 'pageinfo-watchers' ),
 375                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 376                         ];
 377                 }
 378
 379                 // Redirects to this page
 380                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 381                 $pageInfo['header-basic'][] = [
 382                         $linkRenderer->makeLink(
 383                                 $whatLinksHere,
 384                                 $this->msg( 'pageinfo-redirects-name' )->text(),
 385                                 [],
 386                                 [
 387                                         'hidelinks' => 1,
 388                                         'hidetrans' => 1,
 389                                         'hideimages' => $title->getNamespace() == NS_FILE
 390                                 ]
 391                         ),
 392                         $this->msg( 'pageinfo-redirects-value' )
 393                                 ->numParams( count( $title->getRedirectsHere() ) )
 394                 ];
 395
 396                 // Is it counted as a content page?
 397                 if ( $this->page->isCountable() ) {
 398                         $pageInfo['header-basic'][] = [
 399                                 $this->msg( 'pageinfo-contentpage' ),
 400                                 $this->msg( 'pageinfo-contentpage-yes' )
 401                         ];
 402                 }
 403
 404                 // Subpages of this page, if subpages are enabled for the current NS
 405                 if ( $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() ) ) {
 406                         $prefixIndex = SpecialPage::getTitleFor(
 407                                 'Prefixindex', $title->getPrefixedText() . '/' );
 408                         $pageInfo['header-basic'][] = [
 409                                 $linkRenderer->makeLink(
 410                                         $prefixIndex,
 411                                         $this->msg( 'pageinfo-subpages-name' )->text()
 412                                 ),
 413                                 $this->msg( 'pageinfo-subpages-value' )
 414                                         ->numParams(
 415                                                 $pageCounts['subpages']['total'],
 416                                                 $pageCounts['subpages']['redirects'],
 417                                                 $pageCounts['subpages']['nonredirects'] )
 418                         ];
 419                 }
 420
 421                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 422                         $category = Category::newFromTitle( $title );
 423
 424                         // $allCount is the total number of cat members,
 425                         // not the count of how many members are normal pages.
 426                         $allCount = (int)$category->getPageCount();
 427                         $subcatCount = (int)$category->getSubcatCount();
 428                         $fileCount = (int)$category->getFileCount();
 429                         $pagesCount = $allCount - $subcatCount - $fileCount;
 430
 431                         $pageInfo['category-info'] = [
 432                                 [
 433                                         $this->msg( 'pageinfo-category-total' ),
 434                                         $lang->formatNum( $allCount )
 435                                 ],
 436                                 [
 437                                         $this->msg( 'pageinfo-category-pages' ),
 438                                         $lang->formatNum( $pagesCount )
 439                                 ],
 440                                 [
 441                                         $this->msg( 'pageinfo-category-subcats' ),
 442                                         $lang->formatNum( $subcatCount )
 443                                 ],
 444                                 [
 445                                         $this->msg( 'pageinfo-category-files' ),
 446                                         $lang->formatNum( $fileCount )
 447                                 ]
 448                         ];
 449                 }
 450
 451                 // Display image SHA-1 value
 452                 if ( $title->inNamespace( NS_FILE ) ) {
 453                         $fileObj = wfFindFile( $title );
 454                         if ( $fileObj !== false ) {
 455                                 // Convert the base-36 sha1 value obtained from database to base-16
 456                                 $output = Wikimedia\base_convert( $fileObj->getSha1(), 36, 16, 40 );
 457                                 $pageInfo['header-basic'][] = [
 458                                         $this->msg( 'pageinfo-file-hash' ),
 459                                         $output
 460                                 ];
 461                         }
 462                 }
 463
 464                 // Page protection
 465                 $pageInfo['header-restrictions'] = [];
 466
 467                 // Is this page affected by the cascading protection of something which includes it?
 468                 if ( $title->isCascadeProtected() ) {
 469                         $cascadingFrom = '';
 470                         $sources = $title->getCascadeProtectionSources()[0];
 471
 472                         foreach ( $sources as $sourceTitle ) {
 473                                 $cascadingFrom .= Html::rawElement(
 474                                         'li', [], $linkRenderer->makeKnownLink( $sourceTitle ) );
 475                         }
 476
 477                         $cascadingFrom = Html::rawElement( 'ul', [], $cascadingFrom );
 478                         $pageInfo['header-restrictions'][] = [
 479                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 480                                 $cascadingFrom
 481                         ];
 482                 }
 483
 484                 // Is out protection set to cascade to other pages?
 485                 if ( $title->areRestrictionsCascading() ) {
 486                         $pageInfo['header-restrictions'][] = [
 487                                 $this->msg( 'pageinfo-protect-cascading' ),
 488                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 489                         ];
 490                 }
 491
 492                 // Page protection
 493                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 494                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 495
 496                         if ( $protectionLevel == '' ) {
 497                                 // Allow all users
 498                                 $message = $this->msg( 'protect-default' )->escaped();
 499                         } else {
 500                                 // Administrators only
 501                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 502                                 $message = $this->msg( "protect-level-$protectionLevel" );
 503                                 if ( $message->isDisabled() ) {
 504                                         // Require "$1" permission
 505                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 506                                 } else {
 507                                         $message = $message->escaped();
 508                                 }
 509                         }
 510                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 511                         $formattedexpiry = $this->msg( 'parentheses',
 512                                 $lang->formatExpiry( $expiry ) )->escaped();
 513                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 514
 515                         // Messages: restriction-edit, restriction-move, restriction-create,
 516                         // restriction-upload
 517                         $pageInfo['header-restrictions'][] = [
 518                                 $this->msg( "restriction-$restrictionType" ), $message
 519                         ];
 520                 }
 521                 $protectLog = SpecialPage::getTitleFor( 'Log' );
 522                 $pageInfo['header-restrictions'][] = [
 523                         'below',
 524                         $linkRenderer->makeKnownLink(
 525                                 $protectLog,
 526                                 $this->msg( 'pageinfo-view-protect-log' )->text(),
 527                                 [],
 528                                 [ 'type' => 'protect', 'page' => $title->getPrefixedText() ]
 529                         ),
 530                 ];
 531
 532                 if ( !$this->page->exists() ) {
 533                         return $pageInfo;
 534                 }
 535
 536                 // Edit history
 537                 $pageInfo['header-edits'] = [];
 538
 539                 $firstRev = $this->page->getOldestRevision();
 540                 $lastRev = $this->page->getRevision();
 541                 $batch = new LinkBatch;
 542
 543                 if ( $firstRev ) {
 544                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 545                         if ( $firstRevUser !== '' ) {
 546                                 $firstRevUserTitle = Title::makeTitle( NS_USER, $firstRevUser );
 547                                 $batch->addObj( $firstRevUserTitle );
 548                                 $batch->addObj( $firstRevUserTitle->getTalkPage() );
 549                         }
 550                 }
 551
 552                 if ( $lastRev ) {
 553                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 554                         if ( $lastRevUser !== '' ) {
 555                                 $lastRevUserTitle = Title::makeTitle( NS_USER, $lastRevUser );
 556                                 $batch->addObj( $lastRevUserTitle );
 557                                 $batch->addObj( $lastRevUserTitle->getTalkPage() );
 558                         }
 559                 }
 560
 561                 $batch->execute();
 562
 563                 if ( $firstRev ) {
 564                         // Page creator
 565                         $pageInfo['header-edits'][] = [
 566                                 $this->msg( 'pageinfo-firstuser' ),
 567                                 Linker::revUserTools( $firstRev )
 568                         ];
 569
 570                         // Date of page creation
 571                         $pageInfo['header-edits'][] = [
 572                                 $this->msg( 'pageinfo-firsttime' ),
 573                                 $linkRenderer->makeKnownLink(
 574                                         $title,
 575                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 576                                         [],
 577                                         [ 'oldid' => $firstRev->getId() ]
 578                                 )
 579                         ];
 580                 }
 581
 582                 if ( $lastRev ) {
 583                         // Latest editor
 584                         $pageInfo['header-edits'][] = [
 585                                 $this->msg( 'pageinfo-lastuser' ),
 586                                 Linker::revUserTools( $lastRev )
 587                         ];
 588
 589                         // Date of latest edit
 590                         $pageInfo['header-edits'][] = [
 591                                 $this->msg( 'pageinfo-lasttime' ),
 592                                 $linkRenderer->makeKnownLink(
 593                                         $title,
 594                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 595                                         [],
 596                                         [ 'oldid' => $this->page->getLatest() ]
 597                                 )
 598                         ];
 599                 }
 600
 601                 // Total number of edits
 602                 $pageInfo['header-edits'][] = [
 603                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 604                 ];
 605
 606                 // Total number of distinct authors
 607                 if ( $pageCounts['authors'] > 0 ) {
 608                         $pageInfo['header-edits'][] = [
 609                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 610                         ];
 611                 }
 612
 613                 // Recent number of edits (within past 30 days)
 614                 $pageInfo['header-edits'][] = [
 615                         $this->msg( 'pageinfo-recent-edits',
 616                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 617                         $lang->formatNum( $pageCounts['recent_edits'] )
 618                 ];
 619
 620                 // Recent number of distinct authors
 621                 $pageInfo['header-edits'][] = [
 622                         $this->msg( 'pageinfo-recent-authors' ),
 623                         $lang->formatNum( $pageCounts['recent_authors'] )
 624                 ];
 625
 626                 // Array of MagicWord objects
 627                 $magicWords = $services->getMagicWordFactory()->getDoubleUnderscoreArray();
 628
 629                 // Array of magic word IDs
 630                 $wordIDs = $magicWords->names;
 631
 632                 // Array of IDs => localized magic words
 633                 $localizedWords = $services->getContentLanguage()->getMagicWords();
 634
 635                 $listItems = [];
 636                 foreach ( $pageProperties as $property => $value ) {
 637                         if ( in_array( $property, $wordIDs ) ) {
 638                                 $listItems[] = Html::element( 'li', [], $localizedWords[$property][1] );
 639                         }
 640                 }
 641
 642                 $localizedList = Html::rawElement( 'ul', [], implode( '', $listItems ) );
 643                 $hiddenCategories = $this->page->getHiddenCategories();
 644
 645                 if (
 646                         count( $listItems ) > 0 ||
 647                         count( $hiddenCategories ) > 0 ||
 648                         $pageCounts['transclusion']['from'] > 0 ||
 649                         $pageCounts['transclusion']['to'] > 0
 650                 ) {
 651                         $options = [ 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) ];
 652                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 653                         if ( $config->get( 'MiserMode' ) ) {
 654                                 $transcludedTargets = [];
 655                         } else {
 656                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 657                         }
 658
 659                         // Page properties
 660                         $pageInfo['header-properties'] = [];
 661
 662                         // Magic words
 663                         if ( count( $listItems ) > 0 ) {
 664                                 $pageInfo['header-properties'][] = [
 665                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 666                                         $localizedList
 667                                 ];
 668                         }
 669
 670                         // Hidden categories
 671                         if ( count( $hiddenCategories ) > 0 ) {
 672                                 $pageInfo['header-properties'][] = [
 673                                         $this->msg( 'pageinfo-hidden-categories' )
 674                                                 ->numParams( count( $hiddenCategories ) ),
 675                                         Linker::formatHiddenCategories( $hiddenCategories )
 676                                 ];
 677                         }
 678
 679                         // Transcluded templates
 680                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 681                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 682                                         $more = $this->msg( 'morenotlisted' )->escaped();
 683                                 } else {
 684                                         $more = null;
 685                                 }
 686
 687                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 688                                         $this->getContext(),
 689                                         $linkRenderer
 690                                 );
 691
 692                                 $pageInfo['header-properties'][] = [
 693                                         $this->msg( 'pageinfo-templates' )
 694                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 695                                         $templateListFormatter->format( $transcludedTemplates, false, $more )
 696                                 ];
 697                         }
 698
 699                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 700                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 701                                         $more = $linkRenderer->makeLink(
 702                                                 $whatLinksHere,
 703                                                 $this->msg( 'moredotdotdot' )->text(),
 704                                                 [],
 705                                                 [ 'hidelinks' => 1, 'hideredirs' => 1 ]
 706                                         );
 707                                 } else {
 708                                         $more = null;
 709                                 }
 710
 711                                 $templateListFormatter = new TemplatesOnThisPageFormatter(
 712                                         $this->getContext(),
 713                                         $linkRenderer
 714                                 );
 715
 716                                 $pageInfo['header-properties'][] = [
 717                                         $this->msg( 'pageinfo-transclusions' )
 718                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 719                                         $templateListFormatter->format( $transcludedTargets, false, $more )
 720                                 ];
 721                         }
 722                 }
 723
 724                 return $pageInfo;
 725         }
 726
 727         /**
 728          * Returns page counts that would be too "expensive" to retrieve by normal means.
 729          *
 730          * @param WikiPage|Article|Page $page
 731          * @return array
 732          */
 733         protected function pageCounts( Page $page ) {
 734                 $fname = __METHOD__;
 735                 $config = $this->context->getConfig();
 736                 $services = MediaWikiServices::getInstance();
 737                 $cache = $services->getMainWANObjectCache();
 738
 739                 return $cache->getWithSetCallback(
 740                         self::getCacheKey( $cache, $page->getTitle(), $page->getLatest() ),
 741                         WANObjectCache::TTL_WEEK,
 742                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname, $services ) {
 743                                 global $wgActorTableSchemaMigrationStage;
 744
 745                                 $title = $page->getTitle();
 746                                 $id = $title->getArticleID();
 747
 748                                 $dbr = wfGetDB( DB_REPLICA );
 749                                 $dbrWatchlist = wfGetDB( DB_REPLICA, 'watchlist' );
 750                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 751
 752                                 if ( $wgActorTableSchemaMigrationStage & SCHEMA_COMPAT_READ_NEW ) {
 753                                         $tables = [ 'revision_actor_temp' ];
 754                                         $field = 'revactor_actor';
 755                                         $pageField = 'revactor_page';
 756                                         $tsField = 'revactor_timestamp';
 757                                         $joins = [];
 758                                 } else {
 759                                         $tables = [ 'revision' ];
 760                                         $field = 'rev_user_text';
 761                                         $pageField = 'rev_page';
 762                                         $tsField = 'rev_timestamp';
 763                                         $joins = [];
 764                                 }
 765
 766                                 $watchedItemStore = $services->getWatchedItemStore();
 767
 768                                 $result = [];
 769                                 $result['watchers'] = $watchedItemStore->countWatchers( $title );
 770
 771                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 772                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 773                                         $result['visitingWatchers'] = $watchedItemStore->countVisitingWatchers(
 774                                                 $title,
 775                                                 $updated - $config->get( 'WatchersMaxAge' )
 776                                         );
 777                                 }
 778
 779                                 // Total number of edits
 780                                 $edits = (int)$dbr->selectField(
 781                                         'revision',
 782                                         'COUNT(*)',
 783                                         [ 'rev_page' => $id ],
 784                                         $fname
 785                                 );
 786                                 $result['edits'] = $edits;
 787
 788                                 // Total number of distinct authors
 789                                 if ( $config->get( 'MiserMode' ) ) {
 790                                         $result['authors'] = 0;
 791                                 } else {
 792                                         $result['authors'] = (int)$dbr->selectField(
 793                                                 $tables,
 794                                                 "COUNT(DISTINCT $field)",
 795                                                 [ $pageField => $id ],
 796                                                 $fname,
 797                                                 [],
 798                                                 $joins
 799                                         );
 800                                 }
 801
 802                                 // "Recent" threshold defined by RCMaxAge setting
 803                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 804
 805                                 // Recent number of edits
 806                                 $edits = (int)$dbr->selectField(
 807                                         'revision',
 808                                         'COUNT(rev_page)',
 809                                         [
 810                                                 'rev_page' => $id,
 811                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 812                                         ],
 813                                         $fname
 814                                 );
 815                                 $result['recent_edits'] = $edits;
 816
 817                                 // Recent number of distinct authors
 818                                 $result['recent_authors'] = (int)$dbr->selectField(
 819                                         $tables,
 820                                         "COUNT(DISTINCT $field)",
 821                                         [
 822                                                 $pageField => $id,
 823                                                 "$tsField >= " . $dbr->addQuotes( $threshold )
 824                                         ],
 825                                         $fname,
 826                                         [],
 827                                         $joins
 828                                 );
 829
 830                                 // Subpages (if enabled)
 831                                 if ( $services->getNamespaceInfo()->hasSubpages( $title->getNamespace() ) ) {
 832                                         $conds = [ 'page_namespace' => $title->getNamespace() ];
 833                                         $conds[] = 'page_title ' .
 834                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 835
 836                                         // Subpages of this page (redirects)
 837                                         $conds['page_is_redirect'] = 1;
 838                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 839                                                 'page',
 840                                                 'COUNT(page_id)',
 841                                                 $conds,
 842                                                 $fname
 843                                         );
 844
 845                                         // Subpages of this page (non-redirects)
 846                                         $conds['page_is_redirect'] = 0;
 847                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 848                                                 'page',
 849                                                 'COUNT(page_id)',
 850                                                 $conds,
 851                                                 $fname
 852                                         );
 853
 854                                         // Subpages of this page (total)
 855                                         $result['subpages']['total'] = $result['subpages']['redirects']
 856                                                 + $result['subpages']['nonredirects'];
 857                                 }
 858
 859                                 // Counts for the number of transclusion links (to/from)
 860                                 if ( $config->get( 'MiserMode' ) ) {
 861                                         $result['transclusion']['to'] = 0;
 862                                 } else {
 863                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 864                                                 'templatelinks',
 865                                                 'COUNT(tl_from)',
 866                                                 [
 867                                                         'tl_namespace' => $title->getNamespace(),
 868                                                         'tl_title' => $title->getDBkey()
 869                                                 ],
 870                                                 $fname
 871                                         );
 872                                 }
 873
 874                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 875                                         'templatelinks',
 876                                         'COUNT(*)',
 877                                         [ 'tl_from' => $title->getArticleID() ],
 878                                         $fname
 879                                 );
 880
 881                                 return $result;
 882                         }
 883                 );
 884         }
 885
 886         /**
 887          * Returns the name that goes in the "<h1>" page title.
 888          *
 889          * @return string
 890          */
 891         protected function getPageTitle() {
 892                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 893         }
 894
 895         /**
 896          * Get a list of contributors of $article
 897          * @return string Html
 898          */
 899         protected function getContributors() {
 900                 $contributors = $this->page->getContributors();
 901                 $real_names = [];
 902                 $user_names = [];
 903                 $anon_ips = [];
 904                 $linkRenderer = MediaWikiServices::getInstance()->getLinkRenderer();
 905
 906                 # Sift for real versus user names
 907                 /** @var User $user */
 908                 foreach ( $contributors as $user ) {
 909                         $page = $user->isAnon()
 910                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 911                                 : $user->getUserPage();
 912
 913                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 914                         if ( $user->getId() == 0 ) {
 915                                 $anon_ips[] = $linkRenderer->makeLink( $page, $user->getName() );
 916                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 917                                 $real_names[] = $linkRenderer->makeLink( $page, $user->getRealName() );
 918                         } else {
 919                                 $user_names[] = $linkRenderer->makeLink( $page, $user->getName() );
 920                         }
 921                 }
 922
 923                 $lang = $this->getLanguage();
 924
 925                 $real = $lang->listToText( $real_names );
 926
 927                 # "ThisSite user(s) A, B and C"
 928                 if ( count( $user_names ) ) {
 929                         $user = $this->msg( 'siteusers' )
 930                                 ->rawParams( $lang->listToText( $user_names ) )
 931                                 ->params( count( $user_names ) )->escaped();
 932                 } else {
 933                         $user = false;
 934                 }
 935
 936                 if ( count( $anon_ips ) ) {
 937                         $anon = $this->msg( 'anonusers' )
 938                                 ->rawParams( $lang->listToText( $anon_ips ) )
 939                                 ->params( count( $anon_ips ) )->escaped();
 940                 } else {
 941                         $anon = false;
 942                 }
 943
 944                 # This is the big list, all mooshed together. We sift for blank strings
 945                 $fulllist = [];
 946                 foreach ( [ $real, $user, $anon ] as $s ) {
 947                         if ( $s !== '' ) {
 948                                 array_push( $fulllist, $s );
 949                         }
 950                 }
 951
 952                 $count = count( $fulllist );
 953
 954                 # "Based on work by ..."
 955                 return $count
 956                         ? $this->msg( 'othercontribs' )->rawParams(
 957                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 958                         : '';
 959         }
 960
 961         /**
 962          * Returns the description that goes below the "<h1>" tag.
 963          *
 964          * @return string
 965          */
 966         protected function getDescription() {
 967                 return '';
 968         }
 969
 970         /**
 971          * @param WANObjectCache $cache
 972          * @param Title $title
 973          * @param int $revId
 974          * @return string
 975          */
 976         protected static function getCacheKey( WANObjectCache $cache, Title $title, $revId ) {
 977                 return $cache->makeKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 978         }
 979 }