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 /**
  26  * Displays information about a page.
  27  *
  28  * @ingroup Actions
  29  */
  30 class InfoAction extends FormlessAction {
  31         const VERSION = 1;
  32
  33         /**
  34          * Returns the name of the action this object responds to.
  35          *
  36          * @return string Lowercase name
  37          */
  38         public function getName() {
  39                 return 'info';
  40         }
  41
  42         /**
  43          * Whether this action can still be executed by a blocked user.
  44          *
  45          * @return bool
  46          */
  47         public function requiresUnblock() {
  48                 return false;
  49         }
  50
  51         /**
  52          * Whether this action requires the wiki not to be locked.
  53          *
  54          * @return bool
  55          */
  56         public function requiresWrite() {
  57                 return false;
  58         }
  59
  60         /**
  61          * Clear the info cache for a given Title.
  62          *
  63          * @since 1.22
  64          * @param Title $title Title to clear cache for
  65          * @param int|null $revid Revision id to clear
  66          */
  67         public static function invalidateCache( Title $title, $revid = null ) {
  68                 if ( !$revid ) {
  69                         $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
  70                         $revid = $revision ? $revision->getId() : null;
  71                 }
  72                 if ( $revid !== null ) {
  73                         $key = self::getCacheKey( $title, $revid );
  74                         ObjectCache::getMainWANInstance()->delete( $key );
  75                 }
  76         }
  77
  78         /**
  79          * Shows page information on GET request.
  80          *
  81          * @return string Page information that will be added to the output
  82          */
  83         public function onView() {
  84                 $content = '';
  85
  86                 // Validate revision
  87                 $oldid = $this->page->getOldID();
  88                 if ( $oldid ) {
  89                         $revision = $this->page->getRevisionFetched();
  90
  91                         // Revision is missing
  92                         if ( $revision === null ) {
  93                                 return $this->msg( 'missing-revision', $oldid )->parse();
  94                         }
  95
  96                         // Revision is not current
  97                         if ( !$revision->isCurrent() ) {
  98                                 return $this->msg( 'pageinfo-not-current' )->plain();
  99                         }
 100                 }
 101
 102                 // Page header
 103                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 104                         $content .= $this->msg( 'pageinfo-header' )->parse();
 105                 }
 106
 107                 // Hide "This page is a member of # hidden categories" explanation
 108                 $content .= Html::element( 'style', array(),
 109                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 110
 111                 // Hide "Templates used on this page" explanation
 112                 $content .= Html::element( 'style', array(),
 113                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 114
 115                 // Get page information
 116                 $pageInfo = $this->pageInfo();
 117
 118                 // Allow extensions to add additional information
 119                 Hooks::run( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
 120
 121                 // Render page information
 122                 foreach ( $pageInfo as $header => $infoTable ) {
 123                         // Messages:
 124                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 125                         // pageinfo-header-properties, pageinfo-category-info
 126                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 127                         $table = "\n";
 128                         foreach ( $infoTable as $infoRow ) {
 129                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 130                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 131                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 132                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 133                         }
 134                         $content = $this->addTable( $content, $table ) . "\n";
 135                 }
 136
 137                 // Page footer
 138                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 139                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 140                 }
 141
 142                 return $content;
 143         }
 144
 145         /**
 146          * Creates a header that can be added to the output.
 147          *
 148          * @param string $header The header text.
 149          * @return string The HTML.
 150          */
 151         protected function makeHeader( $header ) {
 152                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 153
 154                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 155         }
 156
 157         /**
 158          * Adds a row to a table that will be added to the content.
 159          *
 160          * @param string $table The table that will be added to the content
 161          * @param string $name The name of the row
 162          * @param string $value The value of the row
 163          * @param string $id The ID to use for the 'tr' element
 164          * @return string The table with the row added
 165          */
 166         protected function addRow( $table, $name, $value, $id ) {
 167                 return $table .
 168                         Html::rawElement(
 169                                 'tr',
 170                                 $id === null ? array() : array( 'id' => 'mw-' . $id ),
 171                                 Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
 172                                         Html::rawElement( 'td', array(), $value )
 173                         );
 174         }
 175
 176         /**
 177          * Adds a table to the content that will be added to the output.
 178          *
 179          * @param string $content The content that will be added to the output
 180          * @param string $table The table
 181          * @return string The content with the table added
 182          */
 183         protected function addTable( $content, $table ) {
 184                 return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
 185                         $table );
 186         }
 187
 188         /**
 189          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 190          * may add additional information in arbitrary positions. Array values are arrays with one
 191          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 192          *
 193          * @return array
 194          */
 195         protected function pageInfo() {
 196                 global $wgContLang;
 197
 198                 $user = $this->getUser();
 199                 $lang = $this->getLanguage();
 200                 $title = $this->getTitle();
 201                 $id = $title->getArticleID();
 202                 $config = $this->context->getConfig();
 203
 204                 $pageCounts = $this->pageCounts( $this->page );
 205
 206                 // Get page properties
 207                 $dbr = wfGetDB( DB_SLAVE );
 208                 $result = $dbr->select(
 209                         'page_props',
 210                         array( 'pp_propname', 'pp_value' ),
 211                         array( 'pp_page' => $id ),
 212                         __METHOD__
 213                 );
 214
 215                 $pageProperties = array();
 216                 foreach ( $result as $row ) {
 217                         $pageProperties[$row->pp_propname] = $row->pp_value;
 218                 }
 219
 220                 // Basic information
 221                 $pageInfo = array();
 222                 $pageInfo['header-basic'] = array();
 223
 224                 // Display title
 225                 $displayTitle = $title->getPrefixedText();
 226                 if ( isset( $pageProperties['displaytitle'] ) ) {
 227                         $displayTitle = $pageProperties['displaytitle'];
 228                 }
 229
 230                 $pageInfo['header-basic'][] = array(
 231                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 232                 );
 233
 234                 // Is it a redirect? If so, where to?
 235                 if ( $title->isRedirect() ) {
 236                         $pageInfo['header-basic'][] = array(
 237                                 $this->msg( 'pageinfo-redirectsto' ),
 238                                 Linker::link( $this->page->getRedirectTarget() ) .
 239                                 $this->msg( 'word-separator' )->escaped() .
 240                                 $this->msg( 'parentheses' )->rawParams( Linker::link(
 241                                         $this->page->getRedirectTarget(),
 242                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 243                                         array(),
 244                                         array( 'action' => 'info' )
 245                                 ) )->escaped()
 246                         );
 247                 }
 248
 249                 // Default sort key
 250                 $sortKey = $title->getCategorySortkey();
 251                 if ( isset( $pageProperties['defaultsort'] ) ) {
 252                         $sortKey = $pageProperties['defaultsort'];
 253                 }
 254
 255                 $sortKey = htmlspecialchars( $sortKey );
 256                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 257
 258                 // Page length (in bytes)
 259                 $pageInfo['header-basic'][] = array(
 260                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 261                 );
 262
 263                 // Page ID (number not localised, as it's a database ID)
 264                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 265
 266                 // Language in which the page content is (supposed to be) written
 267                 $pageLang = $title->getPageLanguage()->getCode();
 268
 269                 if ( $config->get( 'PageLanguageUseDB' )
 270                         && $this->getTitle()->userCan( 'pagelang', $this->getUser() )
 271                 ) {
 272                         // Link to Special:PageLanguage with pre-filled page title if user has permissions
 273                         $titleObj = SpecialPage::getTitleFor( 'PageLanguage', $title->getPrefixedText() );
 274                         $langDisp = Linker::link(
 275                                 $titleObj,
 276                                 $this->msg( 'pageinfo-language' )->escaped()
 277                         );
 278                 } else {
 279                         // Display just the message
 280                         $langDisp = $this->msg( 'pageinfo-language' )->escaped();
 281                 }
 282
 283                 $pageInfo['header-basic'][] = array( $langDisp,
 284                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 285                         . ' ' . $this->msg( 'parentheses', $pageLang )->escaped() );
 286
 287                 // Content model of the page
 288                 $pageInfo['header-basic'][] = array(
 289                         $this->msg( 'pageinfo-content-model' ),
 290                         htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) )
 291                 );
 292
 293                 // Search engine status
 294                 $pOutput = new ParserOutput();
 295                 if ( isset( $pageProperties['noindex'] ) ) {
 296                         $pOutput->setIndexPolicy( 'noindex' );
 297                 }
 298                 if ( isset( $pageProperties['index'] ) ) {
 299                         $pOutput->setIndexPolicy( 'index' );
 300                 }
 301
 302                 // Use robot policy logic
 303                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 304                 $pageInfo['header-basic'][] = array(
 305                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 306                         $this->msg( 'pageinfo-robot-policy' ),
 307                         $this->msg( "pageinfo-robot-${policy['index']}" )
 308                 );
 309
 310                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 311                 if (
 312                         $user->isAllowed( 'unwatchedpages' ) ||
 313                         ( $unwatchedPageThreshold !== false &&
 314                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 315                 ) {
 316                         // Number of page watchers
 317                         $pageInfo['header-basic'][] = array(
 318                                 $this->msg( 'pageinfo-watchers' ),
 319                                 $lang->formatNum( $pageCounts['watchers'] )
 320                         );
 321                         if (
 322                                 $config->get( 'ShowUpdatedMarker' ) &&
 323                                 isset( $pageCounts['visitingWatchers'] )
 324                         ) {
 325                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 326                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 327                                         $user->isAllowed( 'unwatchedpages' ) ) {
 328                                         $pageInfo['header-basic'][] = array(
 329                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 330                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 331                                         );
 332                                 } else {
 333                                         $pageInfo['header-basic'][] = array(
 334                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 335                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 336                                         );
 337                                 }
 338                         }
 339                 } elseif ( $unwatchedPageThreshold !== false ) {
 340                         $pageInfo['header-basic'][] = array(
 341                                 $this->msg( 'pageinfo-watchers' ),
 342                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 343                         );
 344                 }
 345
 346                 // Redirects to this page
 347                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 348                 $pageInfo['header-basic'][] = array(
 349                         Linker::link(
 350                                 $whatLinksHere,
 351                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 352                                 array(),
 353                                 array(
 354                                         'hidelinks' => 1,
 355                                         'hidetrans' => 1,
 356                                         'hideimages' => $title->getNamespace() == NS_FILE
 357                                 )
 358                         ),
 359                         $this->msg( 'pageinfo-redirects-value' )
 360                                 ->numParams( count( $title->getRedirectsHere() ) )
 361                 );
 362
 363                 // Is it counted as a content page?
 364                 if ( $this->page->isCountable() ) {
 365                         $pageInfo['header-basic'][] = array(
 366                                 $this->msg( 'pageinfo-contentpage' ),
 367                                 $this->msg( 'pageinfo-contentpage-yes' )
 368                         );
 369                 }
 370
 371                 // Subpages of this page, if subpages are enabled for the current NS
 372                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 373                         $prefixIndex = SpecialPage::getTitleFor(
 374                                 'Prefixindex', $title->getPrefixedText() . '/' );
 375                         $pageInfo['header-basic'][] = array(
 376                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 377                                 $this->msg( 'pageinfo-subpages-value' )
 378                                         ->numParams(
 379                                                 $pageCounts['subpages']['total'],
 380                                                 $pageCounts['subpages']['redirects'],
 381                                                 $pageCounts['subpages']['nonredirects'] )
 382                         );
 383                 }
 384
 385                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 386                         $category = Category::newFromTitle( $title );
 387
 388                         // $allCount is the total number of cat members,
 389                         // not the count of how many members are normal pages.
 390                         $allCount = (int)$category->getPageCount();
 391                         $subcatCount = (int)$category->getSubcatCount();
 392                         $fileCount = (int)$category->getFileCount();
 393                         $pagesCount = $allCount - $subcatCount - $fileCount;
 394
 395                         $pageInfo['category-info'] = array(
 396                                 array(
 397                                         $this->msg( 'pageinfo-category-total' ),
 398                                         $lang->formatNum( $allCount )
 399                                 ),
 400                                 array(
 401                                         $this->msg( 'pageinfo-category-pages' ),
 402                                         $lang->formatNum( $pagesCount )
 403                                 ),
 404                                 array(
 405                                         $this->msg( 'pageinfo-category-subcats' ),
 406                                         $lang->formatNum( $subcatCount )
 407                                 ),
 408                                 array(
 409                                         $this->msg( 'pageinfo-category-files' ),
 410                                         $lang->formatNum( $fileCount )
 411                                 )
 412                         );
 413                 }
 414
 415                 // Page protection
 416                 $pageInfo['header-restrictions'] = array();
 417
 418                 // Is this page affected by the cascading protection of something which includes it?
 419                 if ( $title->isCascadeProtected() ) {
 420                         $cascadingFrom = '';
 421                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 422
 423                         foreach ( $sources[0] as $sourceTitle ) {
 424                                 $cascadingFrom .= Html::rawElement(
 425                                         'li', array(), Linker::linkKnown( $sourceTitle ) );
 426                         }
 427
 428                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 429                         $pageInfo['header-restrictions'][] = array(
 430                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 431                                 $cascadingFrom
 432                         );
 433                 }
 434
 435                 // Is out protection set to cascade to other pages?
 436                 if ( $title->areRestrictionsCascading() ) {
 437                         $pageInfo['header-restrictions'][] = array(
 438                                 $this->msg( 'pageinfo-protect-cascading' ),
 439                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 440                         );
 441                 }
 442
 443                 // Page protection
 444                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 445                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 446
 447                         if ( $protectionLevel == '' ) {
 448                                 // Allow all users
 449                                 $message = $this->msg( 'protect-default' )->escaped();
 450                         } else {
 451                                 // Administrators only
 452                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 453                                 $message = $this->msg( "protect-level-$protectionLevel" );
 454                                 if ( $message->isDisabled() ) {
 455                                         // Require "$1" permission
 456                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 457                                 } else {
 458                                         $message = $message->escaped();
 459                                 }
 460                         }
 461                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 462                         $formattedexpiry = $this->msg( 'parentheses',
 463                                 $this->getLanguage()->formatExpiry( $expiry ) )->escaped();
 464                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 465
 466                         // Messages: restriction-edit, restriction-move, restriction-create,
 467                         // restriction-upload
 468                         $pageInfo['header-restrictions'][] = array(
 469                                 $this->msg( "restriction-$restrictionType" ), $message
 470                         );
 471                 }
 472
 473                 if ( !$this->page->exists() ) {
 474                         return $pageInfo;
 475                 }
 476
 477                 // Edit history
 478                 $pageInfo['header-edits'] = array();
 479
 480                 $firstRev = $this->page->getOldestRevision();
 481                 $lastRev = $this->page->getRevision();
 482                 $batch = new LinkBatch;
 483
 484                 if ( $firstRev ) {
 485                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 486                         if ( $firstRevUser !== '' ) {
 487                                 $batch->add( NS_USER, $firstRevUser );
 488                                 $batch->add( NS_USER_TALK, $firstRevUser );
 489                         }
 490                 }
 491
 492                 if ( $lastRev ) {
 493                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 494                         if ( $lastRevUser !== '' ) {
 495                                 $batch->add( NS_USER, $lastRevUser );
 496                                 $batch->add( NS_USER_TALK, $lastRevUser );
 497                         }
 498                 }
 499
 500                 $batch->execute();
 501
 502                 if ( $firstRev ) {
 503                         // Page creator
 504                         $pageInfo['header-edits'][] = array(
 505                                 $this->msg( 'pageinfo-firstuser' ),
 506                                 Linker::revUserTools( $firstRev )
 507                         );
 508
 509                         // Date of page creation
 510                         $pageInfo['header-edits'][] = array(
 511                                 $this->msg( 'pageinfo-firsttime' ),
 512                                 Linker::linkKnown(
 513                                         $title,
 514                                         htmlspecialchars( $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ) ),
 515                                         array(),
 516                                         array( 'oldid' => $firstRev->getId() )
 517                                 )
 518                         );
 519                 }
 520
 521                 if ( $lastRev ) {
 522                         // Latest editor
 523                         $pageInfo['header-edits'][] = array(
 524                                 $this->msg( 'pageinfo-lastuser' ),
 525                                 Linker::revUserTools( $lastRev )
 526                         );
 527
 528                         // Date of latest edit
 529                         $pageInfo['header-edits'][] = array(
 530                                 $this->msg( 'pageinfo-lasttime' ),
 531                                 Linker::linkKnown(
 532                                         $title,
 533                                         htmlspecialchars(
 534                                                 $lang->userTimeAndDate( $this->page->getTimestamp(), $user )
 535                                         ),
 536                                         array(),
 537                                         array( 'oldid' => $this->page->getLatest() )
 538                                 )
 539                         );
 540                 }
 541
 542                 // Total number of edits
 543                 $pageInfo['header-edits'][] = array(
 544                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 545                 );
 546
 547                 // Total number of distinct authors
 548                 if ( $pageCounts['authors'] > 0 ) {
 549                         $pageInfo['header-edits'][] = array(
 550                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 551                         );
 552                 }
 553
 554                 // Recent number of edits (within past 30 days)
 555                 $pageInfo['header-edits'][] = array(
 556                         $this->msg( 'pageinfo-recent-edits',
 557                                 $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 558                         $lang->formatNum( $pageCounts['recent_edits'] )
 559                 );
 560
 561                 // Recent number of distinct authors
 562                 $pageInfo['header-edits'][] = array(
 563                         $this->msg( 'pageinfo-recent-authors' ),
 564                         $lang->formatNum( $pageCounts['recent_authors'] )
 565                 );
 566
 567                 // Array of MagicWord objects
 568                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 569
 570                 // Array of magic word IDs
 571                 $wordIDs = $magicWords->names;
 572
 573                 // Array of IDs => localized magic words
 574                 $localizedWords = $wgContLang->getMagicWords();
 575
 576                 $listItems = array();
 577                 foreach ( $pageProperties as $property => $value ) {
 578                         if ( in_array( $property, $wordIDs ) ) {
 579                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 580                         }
 581                 }
 582
 583                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 584                 $hiddenCategories = $this->page->getHiddenCategories();
 585
 586                 if (
 587                         count( $listItems ) > 0 ||
 588                         count( $hiddenCategories ) > 0 ||
 589                         $pageCounts['transclusion']['from'] > 0 ||
 590                         $pageCounts['transclusion']['to'] > 0
 591                 ) {
 592                         $options = array( 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) );
 593                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 594                         if ( $config->get( 'MiserMode' ) ) {
 595                                 $transcludedTargets = array();
 596                         } else {
 597                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 598                         }
 599
 600                         // Page properties
 601                         $pageInfo['header-properties'] = array();
 602
 603                         // Magic words
 604                         if ( count( $listItems ) > 0 ) {
 605                                 $pageInfo['header-properties'][] = array(
 606                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 607                                         $localizedList
 608                                 );
 609                         }
 610
 611                         // Hidden categories
 612                         if ( count( $hiddenCategories ) > 0 ) {
 613                                 $pageInfo['header-properties'][] = array(
 614                                         $this->msg( 'pageinfo-hidden-categories' )
 615                                                 ->numParams( count( $hiddenCategories ) ),
 616                                         Linker::formatHiddenCategories( $hiddenCategories )
 617                                 );
 618                         }
 619
 620                         // Transcluded templates
 621                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 622                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 623                                         $more = $this->msg( 'morenotlisted' )->escaped();
 624                                 } else {
 625                                         $more = null;
 626                                 }
 627
 628                                 $pageInfo['header-properties'][] = array(
 629                                         $this->msg( 'pageinfo-templates' )
 630                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 631                                         Linker::formatTemplates(
 632                                                 $transcludedTemplates,
 633                                                 false,
 634                                                 false,
 635                                                 $more )
 636                                 );
 637                         }
 638
 639                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 640                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 641                                         $more = Linker::link(
 642                                                 $whatLinksHere,
 643                                                 $this->msg( 'moredotdotdot' )->escaped(),
 644                                                 array(),
 645                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 646                                         );
 647                                 } else {
 648                                         $more = null;
 649                                 }
 650
 651                                 $pageInfo['header-properties'][] = array(
 652                                         $this->msg( 'pageinfo-transclusions' )
 653                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 654                                         Linker::formatTemplates(
 655                                                 $transcludedTargets,
 656                                                 false,
 657                                                 false,
 658                                                 $more )
 659                                 );
 660                         }
 661                 }
 662
 663                 return $pageInfo;
 664         }
 665
 666         /**
 667          * Returns page counts that would be too "expensive" to retrieve by normal means.
 668          *
 669          * @param WikiPage|Article|Page $page
 670          * @return array
 671          */
 672         protected function pageCounts( Page $page ) {
 673                 $fname = __METHOD__;
 674                 $config = $this->context->getConfig();
 675
 676                 return ObjectCache::getMainWANInstance()->getWithSetCallback(
 677                         self::getCacheKey( $page->getTitle(), $page->getLatest() ),
 678                         86400 * 7,
 679                         function ( $oldValue, &$ttl, &$setOpts ) use ( $page, $config, $fname ) {
 680                                 $title = $page->getTitle();
 681                                 $id = $title->getArticleID();
 682
 683                                 $dbr = wfGetDB( DB_SLAVE );
 684                                 $dbrWatchlist = wfGetDB( DB_SLAVE, 'watchlist' );
 685
 686                                 $setOpts += Database::getCacheSetOptions( $dbr, $dbrWatchlist );
 687
 688                                 $result = array();
 689
 690                                 // Number of page watchers
 691                                 $watchers = (int)$dbrWatchlist->selectField(
 692                                         'watchlist',
 693                                         'COUNT(*)',
 694                                         array(
 695                                                 'wl_namespace' => $title->getNamespace(),
 696                                                 'wl_title' => $title->getDBkey(),
 697                                         ),
 698                                         $fname
 699                                 );
 700                                 $result['watchers'] = $watchers;
 701
 702                                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 703                                         // Threshold: last visited about 26 weeks before latest edit
 704                                         $updated = wfTimestamp( TS_UNIX, $page->getTimestamp() );
 705                                         $age = $config->get( 'WatchersMaxAge' );
 706                                         $threshold = $dbrWatchlist->timestamp( $updated - $age );
 707                                         // Number of page watchers who also visited a "recent" edit
 708                                         $visitingWatchers = (int)$dbrWatchlist->selectField(
 709                                                 'watchlist',
 710                                                 'COUNT(*)',
 711                                                 array(
 712                                                         'wl_namespace' => $title->getNamespace(),
 713                                                         'wl_title' => $title->getDBkey(),
 714                                                         'wl_notificationtimestamp >= ' .
 715                                                                 $dbrWatchlist->addQuotes( $threshold ) .
 716                                                                 ' OR wl_notificationtimestamp IS NULL'
 717                                                 ),
 718                                                 $fname
 719                                         );
 720                                         $result['visitingWatchers'] = $visitingWatchers;
 721                                 }
 722
 723                                 // Total number of edits
 724                                 $edits = (int)$dbr->selectField(
 725                                         'revision',
 726                                         'COUNT(*)',
 727                                         array( 'rev_page' => $id ),
 728                                         $fname
 729                                 );
 730                                 $result['edits'] = $edits;
 731
 732                                 // Total number of distinct authors
 733                                 if ( $config->get( 'MiserMode' ) ) {
 734                                         $result['authors'] = 0;
 735                                 } else {
 736                                         $result['authors'] = (int)$dbr->selectField(
 737                                                 'revision',
 738                                                 'COUNT(DISTINCT rev_user_text)',
 739                                                 array( 'rev_page' => $id ),
 740                                                 $fname
 741                                         );
 742                                 }
 743
 744                                 // "Recent" threshold defined by RCMaxAge setting
 745                                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 746
 747                                 // Recent number of edits
 748                                 $edits = (int)$dbr->selectField(
 749                                         'revision',
 750                                         'COUNT(rev_page)',
 751                                         array(
 752                                                 'rev_page' => $id,
 753                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 754                                         ),
 755                                         $fname
 756                                 );
 757                                 $result['recent_edits'] = $edits;
 758
 759                                 // Recent number of distinct authors
 760                                 $result['recent_authors'] = (int)$dbr->selectField(
 761                                         'revision',
 762                                         'COUNT(DISTINCT rev_user_text)',
 763                                         array(
 764                                                 'rev_page' => $id,
 765                                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 766                                         ),
 767                                         $fname
 768                                 );
 769
 770                                 // Subpages (if enabled)
 771                                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 772                                         $conds = array( 'page_namespace' => $title->getNamespace() );
 773                                         $conds[] = 'page_title ' .
 774                                                 $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 775
 776                                         // Subpages of this page (redirects)
 777                                         $conds['page_is_redirect'] = 1;
 778                                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 779                                                 'page',
 780                                                 'COUNT(page_id)',
 781                                                 $conds,
 782                                                 $fname
 783                                         );
 784
 785                                         // Subpages of this page (non-redirects)
 786                                         $conds['page_is_redirect'] = 0;
 787                                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 788                                                 'page',
 789                                                 'COUNT(page_id)',
 790                                                 $conds,
 791                                                 $fname
 792                                         );
 793
 794                                         // Subpages of this page (total)
 795                                         $result['subpages']['total'] = $result['subpages']['redirects']
 796                                                 + $result['subpages']['nonredirects'];
 797                                 }
 798
 799                                 // Counts for the number of transclusion links (to/from)
 800                                 if ( $config->get( 'MiserMode' ) ) {
 801                                         $result['transclusion']['to'] = 0;
 802                                 } else {
 803                                         $result['transclusion']['to'] = (int)$dbr->selectField(
 804                                                 'templatelinks',
 805                                                 'COUNT(tl_from)',
 806                                                 array(
 807                                                         'tl_namespace' => $title->getNamespace(),
 808                                                         'tl_title' => $title->getDBkey()
 809                                                 ),
 810                                                 $fname
 811                                         );
 812                                 }
 813
 814                                 $result['transclusion']['from'] = (int)$dbr->selectField(
 815                                         'templatelinks',
 816                                         'COUNT(*)',
 817                                         array( 'tl_from' => $title->getArticleID() ),
 818                                         $fname
 819                                 );
 820
 821                                 return $result;
 822                         }
 823                 );
 824         }
 825
 826         /**
 827          * Returns the name that goes in the "<h1>" page title.
 828          *
 829          * @return string
 830          */
 831         protected function getPageTitle() {
 832                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 833         }
 834
 835         /**
 836          * Get a list of contributors of $article
 837          * @return string Html
 838          */
 839         protected function getContributors() {
 840                 $contributors = $this->page->getContributors();
 841                 $real_names = array();
 842                 $user_names = array();
 843                 $anon_ips = array();
 844
 845                 # Sift for real versus user names
 846                 /** @var $user User */
 847                 foreach ( $contributors as $user ) {
 848                         $page = $user->isAnon()
 849                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 850                                 : $user->getUserPage();
 851
 852                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 853                         if ( $user->getID() == 0 ) {
 854                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 855                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 856                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 857                         } else {
 858                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 859                         }
 860                 }
 861
 862                 $lang = $this->getLanguage();
 863
 864                 $real = $lang->listToText( $real_names );
 865
 866                 # "ThisSite user(s) A, B and C"
 867                 if ( count( $user_names ) ) {
 868                         $user = $this->msg( 'siteusers' )
 869                                 ->rawParams( $lang->listToText( $user_names ) )
 870                                 ->params( count( $user_names ) )->escaped();
 871                 } else {
 872                         $user = false;
 873                 }
 874
 875                 if ( count( $anon_ips ) ) {
 876                         $anon = $this->msg( 'anonusers' )
 877                                 ->rawParams( $lang->listToText( $anon_ips ) )
 878                                 ->params( count( $anon_ips ) )->escaped();
 879                 } else {
 880                         $anon = false;
 881                 }
 882
 883                 # This is the big list, all mooshed together. We sift for blank strings
 884                 $fulllist = array();
 885                 foreach ( array( $real, $user, $anon ) as $s ) {
 886                         if ( $s !== '' ) {
 887                                 array_push( $fulllist, $s );
 888                         }
 889                 }
 890
 891                 $count = count( $fulllist );
 892
 893                 # "Based on work by ..."
 894                 return $count
 895                         ? $this->msg( 'othercontribs' )->rawParams(
 896                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 897                         : '';
 898         }
 899
 900         /**
 901          * Returns the description that goes below the "<h1>" tag.
 902          *
 903          * @return string
 904          */
 905         protected function getDescription() {
 906                 return '';
 907         }
 908
 909         /**
 910          * @param Title $title
 911          * @param int $revId
 912          * @return string
 913          */
 914         protected static function getCacheKey( Title $title, $revId ) {
 915                 return wfMemcKey( 'infoaction', md5( $title->getPrefixedText() ), $revId, self::VERSION );
 916         }
 917 }