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( 'hidelinks' => 1, 'hidetrans' => 1 )
 342                         ),
 343                         $this->msg( 'pageinfo-redirects-value' )
 344                                 ->numParams( count( $title->getRedirectsHere() ) )
 345                 );
 346
 347                 // Is it counted as a content page?
 348                 if ( $this->page->isCountable() ) {
 349                         $pageInfo['header-basic'][] = array(
 350                                 $this->msg( 'pageinfo-contentpage' ),
 351                                 $this->msg( 'pageinfo-contentpage-yes' )
 352                         );
 353                 }
 354
 355                 // Subpages of this page, if subpages are enabled for the current NS
 356                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 357                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 358                         $pageInfo['header-basic'][] = array(
 359                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 360                                 $this->msg( 'pageinfo-subpages-value' )
 361                                         ->numParams(
 362                                                 $pageCounts['subpages']['total'],
 363                                                 $pageCounts['subpages']['redirects'],
 364                                                 $pageCounts['subpages']['nonredirects'] )
 365                         );
 366                 }
 367
 368                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 369                         $category = Category::newFromTitle( $title );
 370                         $pageInfo['category-info'] = array(
 371                                 array(
 372                                         $this->msg( 'pageinfo-category-pages' ),
 373                                         $lang->formatNum( $category->getPageCount() )
 374                                 ),
 375                                 array(
 376                                         $this->msg( 'pageinfo-category-subcats' ),
 377                                         $lang->formatNum( $category->getSubcatCount() )
 378                                 ),
 379                                 array(
 380                                         $this->msg( 'pageinfo-category-files' ),
 381                                         $lang->formatNum( $category->getFileCount() )
 382                                 )
 383                         );
 384                 }
 385
 386                 // Page protection
 387                 $pageInfo['header-restrictions'] = array();
 388
 389                 // Is this page effected by the cascading protection of something which includes it?
 390                 if ( $title->isCascadeProtected() ) {
 391                         $cascadingFrom = '';
 392                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 393
 394                         foreach ( $sources[0] as $sourceTitle ) {
 395                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 396                         }
 397
 398                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 399                         $pageInfo['header-restrictions'][] = array(
 400                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 401                                 $cascadingFrom
 402                         );
 403                 }
 404
 405                 // Is out protection set to cascade to other pages?
 406                 if ( $title->areRestrictionsCascading() ) {
 407                         $pageInfo['header-restrictions'][] = array(
 408                                 $this->msg( 'pageinfo-protect-cascading' ),
 409                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 410                         );
 411                 }
 412
 413                 // Page protection
 414                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 415                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 416
 417                         if ( $protectionLevel == '' ) {
 418                                 // Allow all users
 419                                 $message = $this->msg( 'protect-default' )->escaped();
 420                         } else {
 421                                 // Administrators only
 422                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 423                                 $message = $this->msg( "protect-level-$protectionLevel" );
 424                                 if ( $message->isDisabled() ) {
 425                                         // Require "$1" permission
 426                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 427                                 } else {
 428                                         $message = $message->escaped();
 429                                 }
 430                         }
 431
 432                         // Messages: restriction-edit, restriction-move, restriction-create,
 433                         // restriction-upload
 434                         $pageInfo['header-restrictions'][] = array(
 435                                 $this->msg( "restriction-$restrictionType" ), $message
 436                         );
 437                 }
 438
 439                 if ( !$this->page->exists() ) {
 440                         return $pageInfo;
 441                 }
 442
 443                 // Edit history
 444                 $pageInfo['header-edits'] = array();
 445
 446                 $firstRev = $this->page->getOldestRevision();
 447                 $lastRev = $this->page->getRevision();
 448                 $batch = new LinkBatch;
 449
 450                 if ( $firstRev ) {
 451                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 452                         if ( $firstRevUser !== '' ) {
 453                                 $batch->add( NS_USER, $firstRevUser );
 454                                 $batch->add( NS_USER_TALK, $firstRevUser );
 455                         }
 456                 }
 457
 458                 if ( $lastRev ) {
 459                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 460                         if ( $lastRevUser !== '' ) {
 461                                 $batch->add( NS_USER, $lastRevUser );
 462                                 $batch->add( NS_USER_TALK, $lastRevUser );
 463                         }
 464                 }
 465
 466                 $batch->execute();
 467
 468                 if ( $firstRev ) {
 469                         // Page creator
 470                         $pageInfo['header-edits'][] = array(
 471                                 $this->msg( 'pageinfo-firstuser' ),
 472                                 Linker::revUserTools( $firstRev )
 473                         );
 474
 475                         // Date of page creation
 476                         $pageInfo['header-edits'][] = array(
 477                                 $this->msg( 'pageinfo-firsttime' ),
 478                                 Linker::linkKnown(
 479                                         $title,
 480                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 481                                         array(),
 482                                         array( 'oldid' => $firstRev->getId() )
 483                                 )
 484                         );
 485                 }
 486
 487                 if ( $lastRev ) {
 488                         // Latest editor
 489                         $pageInfo['header-edits'][] = array(
 490                                 $this->msg( 'pageinfo-lastuser' ),
 491                                 Linker::revUserTools( $lastRev )
 492                         );
 493
 494                         // Date of latest edit
 495                         $pageInfo['header-edits'][] = array(
 496                                 $this->msg( 'pageinfo-lasttime' ),
 497                                 Linker::linkKnown(
 498                                         $title,
 499                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 500                                         array(),
 501                                         array( 'oldid' => $this->page->getLatest() )
 502                                 )
 503                         );
 504                 }
 505
 506                 // Total number of edits
 507                 $pageInfo['header-edits'][] = array(
 508                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 509                 );
 510
 511                 // Total number of distinct authors
 512                 $pageInfo['header-edits'][] = array(
 513                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 514                 );
 515
 516                 // Recent number of edits (within past 30 days)
 517                 $pageInfo['header-edits'][] = array(
 518                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 519                         $lang->formatNum( $pageCounts['recent_edits'] )
 520                 );
 521
 522                 // Recent number of distinct authors
 523                 $pageInfo['header-edits'][] = array(
 524                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 525                 );
 526
 527                 // Array of MagicWord objects
 528                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 529
 530                 // Array of magic word IDs
 531                 $wordIDs = $magicWords->names;
 532
 533                 // Array of IDs => localized magic words
 534                 $localizedWords = $wgContLang->getMagicWords();
 535
 536                 $listItems = array();
 537                 foreach ( $pageProperties as $property => $value ) {
 538                         if ( in_array( $property, $wordIDs ) ) {
 539                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 540                         }
 541                 }
 542
 543                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 544                 $hiddenCategories = $this->page->getHiddenCategories();
 545
 546                 if (
 547                         count( $listItems ) > 0 ||
 548                         count( $hiddenCategories ) > 0 ||
 549                         $pageCounts['transclusion']['from'] > 0 ||
 550                         $pageCounts['transclusion']['to'] > 0
 551                 ) {
 552                         $options = array( 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) );
 553                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 554                         if ( $config->get( 'MiserMode' ) ) {
 555                                 $transcludedTargets = array();
 556                         } else {
 557                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 558                         }
 559
 560                         // Page properties
 561                         $pageInfo['header-properties'] = array();
 562
 563                         // Magic words
 564                         if ( count( $listItems ) > 0 ) {
 565                                 $pageInfo['header-properties'][] = array(
 566                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 567                                         $localizedList
 568                                 );
 569                         }
 570
 571                         // Hidden categories
 572                         if ( count( $hiddenCategories ) > 0 ) {
 573                                 $pageInfo['header-properties'][] = array(
 574                                         $this->msg( 'pageinfo-hidden-categories' )
 575                                                 ->numParams( count( $hiddenCategories ) ),
 576                                         Linker::formatHiddenCategories( $hiddenCategories )
 577                                 );
 578                         }
 579
 580                         // Transcluded templates
 581                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 582                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 583                                         $more = $this->msg( 'morenotlisted' )->escaped();
 584                                 } else {
 585                                         $more = null;
 586                                 }
 587
 588                                 $pageInfo['header-properties'][] = array(
 589                                         $this->msg( 'pageinfo-templates' )
 590                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 591                                         Linker::formatTemplates(
 592                                                 $transcludedTemplates,
 593                                                 false,
 594                                                 false,
 595                                                 $more )
 596                                 );
 597                         }
 598
 599                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 600                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 601                                         $more = Linker::link(
 602                                                 $whatLinksHere,
 603                                                 $this->msg( 'moredotdotdot' )->escaped(),
 604                                                 array(),
 605                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 606                                         );
 607                                 } else {
 608                                         $more = null;
 609                                 }
 610
 611                                 $pageInfo['header-properties'][] = array(
 612                                         $this->msg( 'pageinfo-transclusions' )
 613                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 614                                         Linker::formatTemplates(
 615                                                 $transcludedTargets,
 616                                                 false,
 617                                                 false,
 618                                                 $more )
 619                                 );
 620                         }
 621                 }
 622
 623                 return $pageInfo;
 624         }
 625
 626         /**
 627          * Returns page counts that would be too "expensive" to retrieve by normal means.
 628          *
 629          * @param Title $title Title to get counts for
 630          * @return array
 631          */
 632         protected function pageCounts( Title $title ) {
 633                 wfProfileIn( __METHOD__ );
 634                 $id = $title->getArticleID();
 635                 $config = $this->context->getConfig();
 636
 637                 $dbr = wfGetDB( DB_SLAVE );
 638                 $result = array();
 639
 640                 // Number of page watchers
 641                 $watchers = (int)$dbr->selectField(
 642                         'watchlist',
 643                         'COUNT(*)',
 644                         array(
 645                                 'wl_namespace' => $title->getNamespace(),
 646                                 'wl_title' => $title->getDBkey(),
 647                         ),
 648                         __METHOD__
 649                 );
 650                 $result['watchers'] = $watchers;
 651
 652                 // Total number of edits
 653                 $edits = (int)$dbr->selectField(
 654                         'revision',
 655                         'COUNT(rev_page)',
 656                         array( 'rev_page' => $id ),
 657                         __METHOD__
 658                 );
 659                 $result['edits'] = $edits;
 660
 661                 // Total number of distinct authors
 662                 $authors = (int)$dbr->selectField(
 663                         'revision',
 664                         'COUNT(DISTINCT rev_user_text)',
 665                         array( 'rev_page' => $id ),
 666                         __METHOD__
 667                 );
 668                 $result['authors'] = $authors;
 669
 670                 // "Recent" threshold defined by RCMaxAge setting
 671                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 672
 673                 // Recent number of edits
 674                 $edits = (int)$dbr->selectField(
 675                         'revision',
 676                         'COUNT(rev_page)',
 677                         array(
 678                                 'rev_page' => $id,
 679                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 680                         ),
 681                         __METHOD__
 682                 );
 683                 $result['recent_edits'] = $edits;
 684
 685                 // Recent number of distinct authors
 686                 $authors = (int)$dbr->selectField(
 687                         'revision',
 688                         'COUNT(DISTINCT rev_user_text)',
 689                         array(
 690                                 'rev_page' => $id,
 691                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 692                         ),
 693                         __METHOD__
 694                 );
 695                 $result['recent_authors'] = $authors;
 696
 697                 // Subpages (if enabled)
 698                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 699                         $conds = array( 'page_namespace' => $title->getNamespace() );
 700                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 701
 702                         // Subpages of this page (redirects)
 703                         $conds['page_is_redirect'] = 1;
 704                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 705                                 'page',
 706                                 'COUNT(page_id)',
 707                                 $conds,
 708                                 __METHOD__ );
 709
 710                         // Subpages of this page (non-redirects)
 711                         $conds['page_is_redirect'] = 0;
 712                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 713                                 'page',
 714                                 'COUNT(page_id)',
 715                                 $conds,
 716                                 __METHOD__
 717                         );
 718
 719                         // Subpages of this page (total)
 720                         $result['subpages']['total'] = $result['subpages']['redirects']
 721                                 + $result['subpages']['nonredirects'];
 722                 }
 723
 724                 // Counts for the number of transclusion links (to/from)
 725                 if ( $config->get( 'MiserMode' ) ) {
 726                         $result['transclusion']['to'] = 0;
 727                 } else {
 728                         $result['transclusion']['to'] = (int)$dbr->selectField(
 729                                 'templatelinks',
 730                                 'COUNT(tl_from)',
 731                                 array(
 732                                         'tl_namespace' => $title->getNamespace(),
 733                                         'tl_title' => $title->getDBkey()
 734                                 ),
 735                                 __METHOD__
 736                         );
 737                 }
 738
 739                 $result['transclusion']['from'] = (int)$dbr->selectField(
 740                         'templatelinks',
 741                         'COUNT(*)',
 742                         array( 'tl_from' => $title->getArticleID() ),
 743                         __METHOD__
 744                 );
 745
 746                 wfProfileOut( __METHOD__ );
 747
 748                 return $result;
 749         }
 750
 751         /**
 752          * Returns the name that goes in the "<h1>" page title.
 753          *
 754          * @return string
 755          */
 756         protected function getPageTitle() {
 757                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 758         }
 759
 760         /**
 761          * Get a list of contributors of $article
 762          * @return string Html
 763          */
 764         protected function getContributors() {
 765                 $contributors = $this->page->getContributors();
 766                 $real_names = array();
 767                 $user_names = array();
 768                 $anon_ips = array();
 769
 770                 # Sift for real versus user names
 771                 /** @var $user User */
 772                 foreach ( $contributors as $user ) {
 773                         $page = $user->isAnon()
 774                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 775                                 : $user->getUserPage();
 776
 777                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 778                         if ( $user->getID() == 0 ) {
 779                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 780                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 781                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 782                         } else {
 783                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 784                         }
 785                 }
 786
 787                 $lang = $this->getLanguage();
 788
 789                 $real = $lang->listToText( $real_names );
 790
 791                 # "ThisSite user(s) A, B and C"
 792                 if ( count( $user_names ) ) {
 793                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 794                                 count( $user_names ) )->escaped();
 795                 } else {
 796                         $user = false;
 797                 }
 798
 799                 if ( count( $anon_ips ) ) {
 800                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 801                                 count( $anon_ips ) )->escaped();
 802                 } else {
 803                         $anon = false;
 804                 }
 805
 806                 # This is the big list, all mooshed together. We sift for blank strings
 807                 $fulllist = array();
 808                 foreach ( array( $real, $user, $anon ) as $s ) {
 809                         if ( $s !== '' ) {
 810                                 array_push( $fulllist, $s );
 811                         }
 812                 }
 813
 814                 $count = count( $fulllist );
 815
 816                 # "Based on work by ..."
 817                 return $count
 818                         ? $this->msg( 'othercontribs' )->rawParams(
 819                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 820                         : '';
 821         }
 822
 823         /**
 824          * Returns the description that goes below the "<h1>" tag.
 825          *
 826          * @return string
 827          */
 828         protected function getDescription() {
 829                 return '';
 830         }
 831 }