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 CACHE_VERSION = '2013-03-17';
  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          */
  66         public static function invalidateCache( Title $title ) {
  67                 global $wgMemc;
  68                 // Clear page info.
  69                 $revision = WikiPage::factory( $title )->getRevision();
  70                 if ( $revision !== null ) {
  71                         $key = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $revision->getId() );
  72                         $wgMemc->delete( $key );
  73                 }
  74         }
  75
  76         /**
  77          * Shows page information on GET request.
  78          *
  79          * @return string Page information that will be added to the output
  80          */
  81         public function onView() {
  82                 $content = '';
  83
  84                 // Validate revision
  85                 $oldid = $this->page->getOldID();
  86                 if ( $oldid ) {
  87                         $revision = $this->page->getRevisionFetched();
  88
  89                         // Revision is missing
  90                         if ( $revision === null ) {
  91                                 return $this->msg( 'missing-revision', $oldid )->parse();
  92                         }
  93
  94                         // Revision is not current
  95                         if ( !$revision->isCurrent() ) {
  96                                 return $this->msg( 'pageinfo-not-current' )->plain();
  97                         }
  98                 }
  99
 100                 // Page header
 101                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 102                         $content .= $this->msg( 'pageinfo-header' )->parse();
 103                 }
 104
 105                 // Hide "This page is a member of # hidden categories" explanation
 106                 $content .= Html::element( 'style', array(),
 107                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 108
 109                 // Hide "Templates used on this page" explanation
 110                 $content .= Html::element( 'style', array(),
 111                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 112
 113                 // Get page information
 114                 $pageInfo = $this->pageInfo();
 115
 116                 // Allow extensions to add additional information
 117                 wfRunHooks( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
 118
 119                 // Render page information
 120                 foreach ( $pageInfo as $header => $infoTable ) {
 121                         // Messages:
 122                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 123                         // pageinfo-header-properties, pageinfo-category-info
 124                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 125                         $table = "\n";
 126                         foreach ( $infoTable as $infoRow ) {
 127                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 128                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 129                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 130                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 131                         }
 132                         $content = $this->addTable( $content, $table ) . "\n";
 133                 }
 134
 135                 // Page footer
 136                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 137                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 138                 }
 139
 140                 // Page credits
 141                 /*if ( $this->page->exists() ) {
 142                         $content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
 143                 }*/
 144
 145                 return $content;
 146         }
 147
 148         /**
 149          * Creates a header that can be added to the output.
 150          *
 151          * @param string $header The header text.
 152          * @return string The HTML.
 153          */
 154         protected function makeHeader( $header ) {
 155                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 156
 157                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 158         }
 159
 160         /**
 161          * Adds a row to a table that will be added to the content.
 162          *
 163          * @param string $table The table that will be added to the content
 164          * @param string $name The name of the row
 165          * @param string $value The value of the row
 166          * @param string $id The ID to use for the 'tr' element
 167          * @return string The table with the row added
 168          */
 169         protected function addRow( $table, $name, $value, $id ) {
 170                 return $table . Html::rawElement( 'tr', $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, $wgMemc;
 197
 198                 $user = $this->getUser();
 199                 $lang = $this->getLanguage();
 200                 $title = $this->getTitle();
 201                 $id = $title->getArticleID();
 202                 $config = $this->context->getConfig();
 203
 204                 $memcKey = wfMemcKey( 'infoaction',
 205                         sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 206                 $pageCounts = $wgMemc->get( $memcKey );
 207                 $version = isset( $pageCounts['cacheversion'] ) ? $pageCounts['cacheversion'] : false;
 208                 if ( $pageCounts === false || $version !== self::CACHE_VERSION ) {
 209                         // Get page information that would be too "expensive" to retrieve by normal means
 210                         $pageCounts = $this->pageCounts( $title );
 211                         $pageCounts['cacheversion'] = self::CACHE_VERSION;
 212
 213                         $wgMemc->set( $memcKey, $pageCounts );
 214                 }
 215
 216                 // Get page properties
 217                 $dbr = wfGetDB( DB_SLAVE );
 218                 $result = $dbr->select(
 219                         'page_props',
 220                         array( 'pp_propname', 'pp_value' ),
 221                         array( 'pp_page' => $id ),
 222                         __METHOD__
 223                 );
 224
 225                 $pageProperties = array();
 226                 foreach ( $result as $row ) {
 227                         $pageProperties[$row->pp_propname] = $row->pp_value;
 228                 }
 229
 230                 // Basic information
 231                 $pageInfo = array();
 232                 $pageInfo['header-basic'] = array();
 233
 234                 // Display title
 235                 $displayTitle = $title->getPrefixedText();
 236                 if ( !empty( $pageProperties['displaytitle'] ) ) {
 237                         $displayTitle = $pageProperties['displaytitle'];
 238                 }
 239
 240                 $pageInfo['header-basic'][] = array(
 241                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 242                 );
 243
 244                 // Is it a redirect? If so, where to?
 245                 if ( $title->isRedirect() ) {
 246                         $pageInfo['header-basic'][] = array(
 247                                 $this->msg( 'pageinfo-redirectsto' ),
 248                                 Linker::link( $this->page->getRedirectTarget() ) .
 249                                 $this->msg( 'word-separator' )->text() .
 250                                 $this->msg( 'parentheses', Linker::link(
 251                                         $this->page->getRedirectTarget(),
 252                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 253                                         array(),
 254                                         array( 'action' => 'info' )
 255                                 ) )->text()
 256                         );
 257                 }
 258
 259                 // Default sort key
 260                 $sortKey = $title->getCategorySortkey();
 261                 if ( !empty( $pageProperties['defaultsort'] ) ) {
 262                         $sortKey = $pageProperties['defaultsort'];
 263                 }
 264
 265                 $sortKey = htmlspecialchars( $sortKey );
 266                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 267
 268                 // Page length (in bytes)
 269                 $pageInfo['header-basic'][] = array(
 270                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 271                 );
 272
 273                 // Page ID (number not localised, as it's a database ID)
 274                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 275
 276                 // Language in which the page content is (supposed to be) written
 277                 $pageLang = $title->getPageLanguage()->getCode();
 278
 279                 if ( $config->get( 'PageLanguageUseDB' ) && $this->getTitle()->userCan( 'pagelang' ) ) {
 280                         // Link to Special:PageLanguage with pre-filled page title if user has permissions
 281                         $titleObj = SpecialPage::getTitleFor( 'PageLanguage', $title->getPrefixedText() );
 282                         $langDisp = Linker::link(
 283                                 $titleObj,
 284                                 $this->msg( 'pageinfo-language' )->escaped()
 285                         );
 286                 } else {
 287                         // Display just the message
 288                         $langDisp = $this->msg( 'pageinfo-language' )->escaped();
 289                 }
 290
 291                 $pageInfo['header-basic'][] = array( $langDisp,
 292                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 293                         . ' ' . $this->msg( 'parentheses', $pageLang )->escaped() );
 294
 295                 // Content model of the page
 296                 $pageInfo['header-basic'][] = array(
 297                         $this->msg( 'pageinfo-content-model' ),
 298                         ContentHandler::getLocalizedName( $title->getContentModel() )
 299                 );
 300
 301                 // Search engine status
 302                 $pOutput = new ParserOutput();
 303                 if ( isset( $pageProperties['noindex'] ) ) {
 304                         $pOutput->setIndexPolicy( 'noindex' );
 305                 }
 306                 if ( isset( $pageProperties['index'] ) ) {
 307                         $pOutput->setIndexPolicy( 'index' );
 308                 }
 309
 310                 // Use robot policy logic
 311                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 312                 $pageInfo['header-basic'][] = array(
 313                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 314                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 315                 );
 316
 317                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 318                 if (
 319                         $user->isAllowed( 'unwatchedpages' ) ||
 320                         ( $unwatchedPageThreshold !== false &&
 321                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 322                 ) {
 323                         // Number of page watchers
 324                         $pageInfo['header-basic'][] = array(
 325                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 326                         );
 327                 } elseif ( $unwatchedPageThreshold !== false ) {
 328                         $pageInfo['header-basic'][] = array(
 329                                 $this->msg( 'pageinfo-watchers' ),
 330                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 331                         );
 332                 }
 333
 334                 // Redirects to this page
 335                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 336                 $pageInfo['header-basic'][] = array(
 337                         Linker::link(
 338                                 $whatLinksHere,
 339                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 340                                 array(),
 341                                 array(
 342                                         'hidelinks' => 1,
 343                                         'hidetrans' => 1,
 344                                         'hideimages' => $title->getNamespace() == NS_FILE
 345                                 )
 346                         ),
 347                         $this->msg( 'pageinfo-redirects-value' )
 348                                 ->numParams( count( $title->getRedirectsHere() ) )
 349                 );
 350
 351                 // Is it counted as a content page?
 352                 if ( $this->page->isCountable() ) {
 353                         $pageInfo['header-basic'][] = array(
 354                                 $this->msg( 'pageinfo-contentpage' ),
 355                                 $this->msg( 'pageinfo-contentpage-yes' )
 356                         );
 357                 }
 358
 359                 // Subpages of this page, if subpages are enabled for the current NS
 360                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 361                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 362                         $pageInfo['header-basic'][] = array(
 363                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 364                                 $this->msg( 'pageinfo-subpages-value' )
 365                                         ->numParams(
 366                                                 $pageCounts['subpages']['total'],
 367                                                 $pageCounts['subpages']['redirects'],
 368                                                 $pageCounts['subpages']['nonredirects'] )
 369                         );
 370                 }
 371
 372                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 373                         $category = Category::newFromTitle( $title );
 374                         $pageInfo['category-info'] = array(
 375                                 array(
 376                                         $this->msg( 'pageinfo-category-pages' ),
 377                                         $lang->formatNum( $category->getPageCount() )
 378                                 ),
 379                                 array(
 380                                         $this->msg( 'pageinfo-category-subcats' ),
 381                                         $lang->formatNum( $category->getSubcatCount() )
 382                                 ),
 383                                 array(
 384                                         $this->msg( 'pageinfo-category-files' ),
 385                                         $lang->formatNum( $category->getFileCount() )
 386                                 )
 387                         );
 388                 }
 389
 390                 // Page protection
 391                 $pageInfo['header-restrictions'] = array();
 392
 393                 // Is this page effected by the cascading protection of something which includes it?
 394                 if ( $title->isCascadeProtected() ) {
 395                         $cascadingFrom = '';
 396                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 397
 398                         foreach ( $sources[0] as $sourceTitle ) {
 399                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 400                         }
 401
 402                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 403                         $pageInfo['header-restrictions'][] = array(
 404                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 405                                 $cascadingFrom
 406                         );
 407                 }
 408
 409                 // Is out protection set to cascade to other pages?
 410                 if ( $title->areRestrictionsCascading() ) {
 411                         $pageInfo['header-restrictions'][] = array(
 412                                 $this->msg( 'pageinfo-protect-cascading' ),
 413                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 414                         );
 415                 }
 416
 417                 // Page protection
 418                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 419                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 420
 421                         if ( $protectionLevel == '' ) {
 422                                 // Allow all users
 423                                 $message = $this->msg( 'protect-default' )->escaped();
 424                         } else {
 425                                 // Administrators only
 426                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 427                                 $message = $this->msg( "protect-level-$protectionLevel" );
 428                                 if ( $message->isDisabled() ) {
 429                                         // Require "$1" permission
 430                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 431                                 } else {
 432                                         $message = $message->escaped();
 433                                 }
 434                         }
 435
 436                         // Messages: restriction-edit, restriction-move, restriction-create,
 437                         // restriction-upload
 438                         $pageInfo['header-restrictions'][] = array(
 439                                 $this->msg( "restriction-$restrictionType" ), $message
 440                         );
 441                 }
 442
 443                 if ( !$this->page->exists() ) {
 444                         return $pageInfo;
 445                 }
 446
 447                 // Edit history
 448                 $pageInfo['header-edits'] = array();
 449
 450                 $firstRev = $this->page->getOldestRevision();
 451                 $lastRev = $this->page->getRevision();
 452                 $batch = new LinkBatch;
 453
 454                 if ( $firstRev ) {
 455                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 456                         if ( $firstRevUser !== '' ) {
 457                                 $batch->add( NS_USER, $firstRevUser );
 458                                 $batch->add( NS_USER_TALK, $firstRevUser );
 459                         }
 460                 }
 461
 462                 if ( $lastRev ) {
 463                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 464                         if ( $lastRevUser !== '' ) {
 465                                 $batch->add( NS_USER, $lastRevUser );
 466                                 $batch->add( NS_USER_TALK, $lastRevUser );
 467                         }
 468                 }
 469
 470                 $batch->execute();
 471
 472                 if ( $firstRev ) {
 473                         // Page creator
 474                         $pageInfo['header-edits'][] = array(
 475                                 $this->msg( 'pageinfo-firstuser' ),
 476                                 Linker::revUserTools( $firstRev )
 477                         );
 478
 479                         // Date of page creation
 480                         $pageInfo['header-edits'][] = array(
 481                                 $this->msg( 'pageinfo-firsttime' ),
 482                                 Linker::linkKnown(
 483                                         $title,
 484                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 485                                         array(),
 486                                         array( 'oldid' => $firstRev->getId() )
 487                                 )
 488                         );
 489                 }
 490
 491                 if ( $lastRev ) {
 492                         // Latest editor
 493                         $pageInfo['header-edits'][] = array(
 494                                 $this->msg( 'pageinfo-lastuser' ),
 495                                 Linker::revUserTools( $lastRev )
 496                         );
 497
 498                         // Date of latest edit
 499                         $pageInfo['header-edits'][] = array(
 500                                 $this->msg( 'pageinfo-lasttime' ),
 501                                 Linker::linkKnown(
 502                                         $title,
 503                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 504                                         array(),
 505                                         array( 'oldid' => $this->page->getLatest() )
 506                                 )
 507                         );
 508                 }
 509
 510                 // Total number of edits
 511                 $pageInfo['header-edits'][] = array(
 512                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 513                 );
 514
 515                 // Total number of distinct authors
 516                 $pageInfo['header-edits'][] = array(
 517                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 518                 );
 519
 520                 // Recent number of edits (within past 30 days)
 521                 $pageInfo['header-edits'][] = array(
 522                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 523                         $lang->formatNum( $pageCounts['recent_edits'] )
 524                 );
 525
 526                 // Recent number of distinct authors
 527                 $pageInfo['header-edits'][] = array(
 528                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 529                 );
 530
 531                 // Array of MagicWord objects
 532                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 533
 534                 // Array of magic word IDs
 535                 $wordIDs = $magicWords->names;
 536
 537                 // Array of IDs => localized magic words
 538                 $localizedWords = $wgContLang->getMagicWords();
 539
 540                 $listItems = array();
 541                 foreach ( $pageProperties as $property => $value ) {
 542                         if ( in_array( $property, $wordIDs ) ) {
 543                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 544                         }
 545                 }
 546
 547                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 548                 $hiddenCategories = $this->page->getHiddenCategories();
 549
 550                 if (
 551                         count( $listItems ) > 0 ||
 552                         count( $hiddenCategories ) > 0 ||
 553                         $pageCounts['transclusion']['from'] > 0 ||
 554                         $pageCounts['transclusion']['to'] > 0
 555                 ) {
 556                         $options = array( 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) );
 557                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 558                         if ( $config->get( 'MiserMode' ) ) {
 559                                 $transcludedTargets = array();
 560                         } else {
 561                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 562                         }
 563
 564                         // Page properties
 565                         $pageInfo['header-properties'] = array();
 566
 567                         // Magic words
 568                         if ( count( $listItems ) > 0 ) {
 569                                 $pageInfo['header-properties'][] = array(
 570                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 571                                         $localizedList
 572                                 );
 573                         }
 574
 575                         // Hidden categories
 576                         if ( count( $hiddenCategories ) > 0 ) {
 577                                 $pageInfo['header-properties'][] = array(
 578                                         $this->msg( 'pageinfo-hidden-categories' )
 579                                                 ->numParams( count( $hiddenCategories ) ),
 580                                         Linker::formatHiddenCategories( $hiddenCategories )
 581                                 );
 582                         }
 583
 584                         // Transcluded templates
 585                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 586                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 587                                         $more = $this->msg( 'morenotlisted' )->escaped();
 588                                 } else {
 589                                         $more = null;
 590                                 }
 591
 592                                 $pageInfo['header-properties'][] = array(
 593                                         $this->msg( 'pageinfo-templates' )
 594                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 595                                         Linker::formatTemplates(
 596                                                 $transcludedTemplates,
 597                                                 false,
 598                                                 false,
 599                                                 $more )
 600                                 );
 601                         }
 602
 603                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 604                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 605                                         $more = Linker::link(
 606                                                 $whatLinksHere,
 607                                                 $this->msg( 'moredotdotdot' )->escaped(),
 608                                                 array(),
 609                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 610                                         );
 611                                 } else {
 612                                         $more = null;
 613                                 }
 614
 615                                 $pageInfo['header-properties'][] = array(
 616                                         $this->msg( 'pageinfo-transclusions' )
 617                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 618                                         Linker::formatTemplates(
 619                                                 $transcludedTargets,
 620                                                 false,
 621                                                 false,
 622                                                 $more )
 623                                 );
 624                         }
 625                 }
 626
 627                 return $pageInfo;
 628         }
 629
 630         /**
 631          * Returns page counts that would be too "expensive" to retrieve by normal means.
 632          *
 633          * @param Title $title Title to get counts for
 634          * @return array
 635          */
 636         protected function pageCounts( Title $title ) {
 637                 wfProfileIn( __METHOD__ );
 638                 $id = $title->getArticleID();
 639                 $config = $this->context->getConfig();
 640
 641                 $dbr = wfGetDB( DB_SLAVE );
 642                 $result = array();
 643
 644                 // Number of page watchers
 645                 $watchers = (int)$dbr->selectField(
 646                         'watchlist',
 647                         'COUNT(*)',
 648                         array(
 649                                 'wl_namespace' => $title->getNamespace(),
 650                                 'wl_title' => $title->getDBkey(),
 651                         ),
 652                         __METHOD__
 653                 );
 654                 $result['watchers'] = $watchers;
 655
 656                 // Total number of edits
 657                 $edits = (int)$dbr->selectField(
 658                         'revision',
 659                         'COUNT(rev_page)',
 660                         array( 'rev_page' => $id ),
 661                         __METHOD__
 662                 );
 663                 $result['edits'] = $edits;
 664
 665                 // Total number of distinct authors
 666                 $authors = (int)$dbr->selectField(
 667                         'revision',
 668                         'COUNT(DISTINCT rev_user_text)',
 669                         array( 'rev_page' => $id ),
 670                         __METHOD__
 671                 );
 672                 $result['authors'] = $authors;
 673
 674                 // "Recent" threshold defined by RCMaxAge setting
 675                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 676
 677                 // Recent number of edits
 678                 $edits = (int)$dbr->selectField(
 679                         'revision',
 680                         'COUNT(rev_page)',
 681                         array(
 682                                 'rev_page' => $id,
 683                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 684                         ),
 685                         __METHOD__
 686                 );
 687                 $result['recent_edits'] = $edits;
 688
 689                 // Recent number of distinct authors
 690                 $authors = (int)$dbr->selectField(
 691                         'revision',
 692                         'COUNT(DISTINCT rev_user_text)',
 693                         array(
 694                                 'rev_page' => $id,
 695                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 696                         ),
 697                         __METHOD__
 698                 );
 699                 $result['recent_authors'] = $authors;
 700
 701                 // Subpages (if enabled)
 702                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 703                         $conds = array( 'page_namespace' => $title->getNamespace() );
 704                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 705
 706                         // Subpages of this page (redirects)
 707                         $conds['page_is_redirect'] = 1;
 708                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 709                                 'page',
 710                                 'COUNT(page_id)',
 711                                 $conds,
 712                                 __METHOD__ );
 713
 714                         // Subpages of this page (non-redirects)
 715                         $conds['page_is_redirect'] = 0;
 716                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 717                                 'page',
 718                                 'COUNT(page_id)',
 719                                 $conds,
 720                                 __METHOD__
 721                         );
 722
 723                         // Subpages of this page (total)
 724                         $result['subpages']['total'] = $result['subpages']['redirects']
 725                                 + $result['subpages']['nonredirects'];
 726                 }
 727
 728                 // Counts for the number of transclusion links (to/from)
 729                 if ( $config->get( 'MiserMode' ) ) {
 730                         $result['transclusion']['to'] = 0;
 731                 } else {
 732                         $result['transclusion']['to'] = (int)$dbr->selectField(
 733                                 'templatelinks',
 734                                 'COUNT(tl_from)',
 735                                 array(
 736                                         'tl_namespace' => $title->getNamespace(),
 737                                         'tl_title' => $title->getDBkey()
 738                                 ),
 739                                 __METHOD__
 740                         );
 741                 }
 742
 743                 $result['transclusion']['from'] = (int)$dbr->selectField(
 744                         'templatelinks',
 745                         'COUNT(*)',
 746                         array( 'tl_from' => $title->getArticleID() ),
 747                         __METHOD__
 748                 );
 749
 750                 wfProfileOut( __METHOD__ );
 751
 752                 return $result;
 753         }
 754
 755         /**
 756          * Returns the name that goes in the "<h1>" page title.
 757          *
 758          * @return string
 759          */
 760         protected function getPageTitle() {
 761                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 762         }
 763
 764         /**
 765          * Get a list of contributors of $article
 766          * @return string Html
 767          */
 768         protected function getContributors() {
 769                 $contributors = $this->page->getContributors();
 770                 $real_names = array();
 771                 $user_names = array();
 772                 $anon_ips = array();
 773
 774                 # Sift for real versus user names
 775                 /** @var $user User */
 776                 foreach ( $contributors as $user ) {
 777                         $page = $user->isAnon()
 778                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 779                                 : $user->getUserPage();
 780
 781                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 782                         if ( $user->getID() == 0 ) {
 783                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 784                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 785                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 786                         } else {
 787                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 788                         }
 789                 }
 790
 791                 $lang = $this->getLanguage();
 792
 793                 $real = $lang->listToText( $real_names );
 794
 795                 # "ThisSite user(s) A, B and C"
 796                 if ( count( $user_names ) ) {
 797                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 798                                 count( $user_names ) )->escaped();
 799                 } else {
 800                         $user = false;
 801                 }
 802
 803                 if ( count( $anon_ips ) ) {
 804                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 805                                 count( $anon_ips ) )->escaped();
 806                 } else {
 807                         $anon = false;
 808                 }
 809
 810                 # This is the big list, all mooshed together. We sift for blank strings
 811                 $fulllist = array();
 812                 foreach ( array( $real, $user, $anon ) as $s ) {
 813                         if ( $s !== '' ) {
 814                                 array_push( $fulllist, $s );
 815                         }
 816                 }
 817
 818                 $count = count( $fulllist );
 819
 820                 # "Based on work by ..."
 821                 return $count
 822                         ? $this->msg( 'othercontribs' )->rawParams(
 823                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 824                         : '';
 825         }
 826
 827         /**
 828          * Returns the description that goes below the "<h1>" tag.
 829          *
 830          * @return string
 831          */
 832         protected function getDescription() {
 833                 return '';
 834         }
 835 }