includes/actions/InfoAction.php

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