includes/actions/InfoAction.php

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