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                 Hooks::run( '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' )
 280                         && $this->getTitle()->userCan( 'pagelang', $this->getUser() )
 281                 ) {
 282                         // Link to Special:PageLanguage with pre-filled page title if user has permissions
 283                         $titleObj = SpecialPage::getTitleFor( 'PageLanguage', $title->getPrefixedText() );
 284                         $langDisp = Linker::link(
 285                                 $titleObj,
 286                                 $this->msg( 'pageinfo-language' )->escaped()
 287                         );
 288                 } else {
 289                         // Display just the message
 290                         $langDisp = $this->msg( 'pageinfo-language' )->escaped();
 291                 }
 292
 293                 $pageInfo['header-basic'][] = array( $langDisp,
 294                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 295                         . ' ' . $this->msg( 'parentheses', $pageLang )->escaped() );
 296
 297                 // Content model of the page
 298                 $pageInfo['header-basic'][] = array(
 299                         $this->msg( 'pageinfo-content-model' ),
 300                         htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) )
 301                 );
 302
 303                 // Search engine status
 304                 $pOutput = new ParserOutput();
 305                 if ( isset( $pageProperties['noindex'] ) ) {
 306                         $pOutput->setIndexPolicy( 'noindex' );
 307                 }
 308                 if ( isset( $pageProperties['index'] ) ) {
 309                         $pOutput->setIndexPolicy( 'index' );
 310                 }
 311
 312                 // Use robot policy logic
 313                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 314                 $pageInfo['header-basic'][] = array(
 315                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 316                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 317                 );
 318
 319                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 320                 if (
 321                         $user->isAllowed( 'unwatchedpages' ) ||
 322                         ( $unwatchedPageThreshold !== false &&
 323                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 324                 ) {
 325                         // Number of page watchers
 326                         $pageInfo['header-basic'][] = array(
 327                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 328                         );
 329                 } elseif ( $unwatchedPageThreshold !== false ) {
 330                         $pageInfo['header-basic'][] = array(
 331                                 $this->msg( 'pageinfo-watchers' ),
 332                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 333                         );
 334                 }
 335
 336                 // Redirects to this page
 337                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 338                 $pageInfo['header-basic'][] = array(
 339                         Linker::link(
 340                                 $whatLinksHere,
 341                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 342                                 array(),
 343                                 array(
 344                                         'hidelinks' => 1,
 345                                         'hidetrans' => 1,
 346                                         'hideimages' => $title->getNamespace() == NS_FILE
 347                                 )
 348                         ),
 349                         $this->msg( 'pageinfo-redirects-value' )
 350                                 ->numParams( count( $title->getRedirectsHere() ) )
 351                 );
 352
 353                 // Is it counted as a content page?
 354                 if ( $this->page->isCountable() ) {
 355                         $pageInfo['header-basic'][] = array(
 356                                 $this->msg( 'pageinfo-contentpage' ),
 357                                 $this->msg( 'pageinfo-contentpage-yes' )
 358                         );
 359                 }
 360
 361                 // Subpages of this page, if subpages are enabled for the current NS
 362                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 363                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 364                         $pageInfo['header-basic'][] = array(
 365                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 366                                 $this->msg( 'pageinfo-subpages-value' )
 367                                         ->numParams(
 368                                                 $pageCounts['subpages']['total'],
 369                                                 $pageCounts['subpages']['redirects'],
 370                                                 $pageCounts['subpages']['nonredirects'] )
 371                         );
 372                 }
 373
 374                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 375                         $category = Category::newFromTitle( $title );
 376                         $pageInfo['category-info'] = array(
 377                                 array(
 378                                         $this->msg( 'pageinfo-category-pages' ),
 379                                         $lang->formatNum( $category->getPageCount() )
 380                                 ),
 381                                 array(
 382                                         $this->msg( 'pageinfo-category-subcats' ),
 383                                         $lang->formatNum( $category->getSubcatCount() )
 384                                 ),
 385                                 array(
 386                                         $this->msg( 'pageinfo-category-files' ),
 387                                         $lang->formatNum( $category->getFileCount() )
 388                                 )
 389                         );
 390                 }
 391
 392                 // Page protection
 393                 $pageInfo['header-restrictions'] = array();
 394
 395                 // Is this page affected by the cascading protection of something which includes it?
 396                 if ( $title->isCascadeProtected() ) {
 397                         $cascadingFrom = '';
 398                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 399
 400                         foreach ( $sources[0] as $sourceTitle ) {
 401                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 402                         }
 403
 404                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 405                         $pageInfo['header-restrictions'][] = array(
 406                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 407                                 $cascadingFrom
 408                         );
 409                 }
 410
 411                 // Is out protection set to cascade to other pages?
 412                 if ( $title->areRestrictionsCascading() ) {
 413                         $pageInfo['header-restrictions'][] = array(
 414                                 $this->msg( 'pageinfo-protect-cascading' ),
 415                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 416                         );
 417                 }
 418
 419                 // Page protection
 420                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 421                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 422
 423                         if ( $protectionLevel == '' ) {
 424                                 // Allow all users
 425                                 $message = $this->msg( 'protect-default' )->escaped();
 426                         } else {
 427                                 // Administrators only
 428                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 429                                 $message = $this->msg( "protect-level-$protectionLevel" );
 430                                 if ( $message->isDisabled() ) {
 431                                         // Require "$1" permission
 432                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 433                                 } else {
 434                                         $message = $message->escaped();
 435                                 }
 436                         }
 437
 438                         // Messages: restriction-edit, restriction-move, restriction-create,
 439                         // restriction-upload
 440                         $pageInfo['header-restrictions'][] = array(
 441                                 $this->msg( "restriction-$restrictionType" ), $message
 442                         );
 443                 }
 444
 445                 if ( !$this->page->exists() ) {
 446                         return $pageInfo;
 447                 }
 448
 449                 // Edit history
 450                 $pageInfo['header-edits'] = array();
 451
 452                 $firstRev = $this->page->getOldestRevision();
 453                 $lastRev = $this->page->getRevision();
 454                 $batch = new LinkBatch;
 455
 456                 if ( $firstRev ) {
 457                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 458                         if ( $firstRevUser !== '' ) {
 459                                 $batch->add( NS_USER, $firstRevUser );
 460                                 $batch->add( NS_USER_TALK, $firstRevUser );
 461                         }
 462                 }
 463
 464                 if ( $lastRev ) {
 465                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 466                         if ( $lastRevUser !== '' ) {
 467                                 $batch->add( NS_USER, $lastRevUser );
 468                                 $batch->add( NS_USER_TALK, $lastRevUser );
 469                         }
 470                 }
 471
 472                 $batch->execute();
 473
 474                 if ( $firstRev ) {
 475                         // Page creator
 476                         $pageInfo['header-edits'][] = array(
 477                                 $this->msg( 'pageinfo-firstuser' ),
 478                                 Linker::revUserTools( $firstRev )
 479                         );
 480
 481                         // Date of page creation
 482                         $pageInfo['header-edits'][] = array(
 483                                 $this->msg( 'pageinfo-firsttime' ),
 484                                 Linker::linkKnown(
 485                                         $title,
 486                                         htmlspecialchars( $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ) ),
 487                                         array(),
 488                                         array( 'oldid' => $firstRev->getId() )
 489                                 )
 490                         );
 491                 }
 492
 493                 if ( $lastRev ) {
 494                         // Latest editor
 495                         $pageInfo['header-edits'][] = array(
 496                                 $this->msg( 'pageinfo-lastuser' ),
 497                                 Linker::revUserTools( $lastRev )
 498                         );
 499
 500                         // Date of latest edit
 501                         $pageInfo['header-edits'][] = array(
 502                                 $this->msg( 'pageinfo-lasttime' ),
 503                                 Linker::linkKnown(
 504                                         $title,
 505                                         htmlspecialchars( $lang->userTimeAndDate( $this->page->getTimestamp(), $user ) ),
 506                                         array(),
 507                                         array( 'oldid' => $this->page->getLatest() )
 508                                 )
 509                         );
 510                 }
 511
 512                 // Total number of edits
 513                 $pageInfo['header-edits'][] = array(
 514                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 515                 );
 516
 517                 // Total number of distinct authors
 518                 $pageInfo['header-edits'][] = array(
 519                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 520                 );
 521
 522                 // Recent number of edits (within past 30 days)
 523                 $pageInfo['header-edits'][] = array(
 524                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 525                         $lang->formatNum( $pageCounts['recent_edits'] )
 526                 );
 527
 528                 // Recent number of distinct authors
 529                 $pageInfo['header-edits'][] = array(
 530                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 531                 );
 532
 533                 // Array of MagicWord objects
 534                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 535
 536                 // Array of magic word IDs
 537                 $wordIDs = $magicWords->names;
 538
 539                 // Array of IDs => localized magic words
 540                 $localizedWords = $wgContLang->getMagicWords();
 541
 542                 $listItems = array();
 543                 foreach ( $pageProperties as $property => $value ) {
 544                         if ( in_array( $property, $wordIDs ) ) {
 545                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 546                         }
 547                 }
 548
 549                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 550                 $hiddenCategories = $this->page->getHiddenCategories();
 551
 552                 if (
 553                         count( $listItems ) > 0 ||
 554                         count( $hiddenCategories ) > 0 ||
 555                         $pageCounts['transclusion']['from'] > 0 ||
 556                         $pageCounts['transclusion']['to'] > 0
 557                 ) {
 558                         $options = array( 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) );
 559                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 560                         if ( $config->get( 'MiserMode' ) ) {
 561                                 $transcludedTargets = array();
 562                         } else {
 563                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 564                         }
 565
 566                         // Page properties
 567                         $pageInfo['header-properties'] = array();
 568
 569                         // Magic words
 570                         if ( count( $listItems ) > 0 ) {
 571                                 $pageInfo['header-properties'][] = array(
 572                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 573                                         $localizedList
 574                                 );
 575                         }
 576
 577                         // Hidden categories
 578                         if ( count( $hiddenCategories ) > 0 ) {
 579                                 $pageInfo['header-properties'][] = array(
 580                                         $this->msg( 'pageinfo-hidden-categories' )
 581                                                 ->numParams( count( $hiddenCategories ) ),
 582                                         Linker::formatHiddenCategories( $hiddenCategories )
 583                                 );
 584                         }
 585
 586                         // Transcluded templates
 587                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 588                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 589                                         $more = $this->msg( 'morenotlisted' )->escaped();
 590                                 } else {
 591                                         $more = null;
 592                                 }
 593
 594                                 $pageInfo['header-properties'][] = array(
 595                                         $this->msg( 'pageinfo-templates' )
 596                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 597                                         Linker::formatTemplates(
 598                                                 $transcludedTemplates,
 599                                                 false,
 600                                                 false,
 601                                                 $more )
 602                                 );
 603                         }
 604
 605                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 606                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 607                                         $more = Linker::link(
 608                                                 $whatLinksHere,
 609                                                 $this->msg( 'moredotdotdot' )->escaped(),
 610                                                 array(),
 611                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 612                                         );
 613                                 } else {
 614                                         $more = null;
 615                                 }
 616
 617                                 $pageInfo['header-properties'][] = array(
 618                                         $this->msg( 'pageinfo-transclusions' )
 619                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 620                                         Linker::formatTemplates(
 621                                                 $transcludedTargets,
 622                                                 false,
 623                                                 false,
 624                                                 $more )
 625                                 );
 626                         }
 627                 }
 628
 629                 return $pageInfo;
 630         }
 631
 632         /**
 633          * Returns page counts that would be too "expensive" to retrieve by normal means.
 634          *
 635          * @param Title $title Title to get counts for
 636          * @return array
 637          */
 638         protected function pageCounts( Title $title ) {
 639                 $id = $title->getArticleID();
 640                 $config = $this->context->getConfig();
 641
 642                 $dbr = wfGetDB( DB_SLAVE );
 643                 $result = array();
 644
 645                 // Number of page watchers
 646                 $watchers = (int)$dbr->selectField(
 647                         'watchlist',
 648                         'COUNT(*)',
 649                         array(
 650                                 'wl_namespace' => $title->getNamespace(),
 651                                 'wl_title' => $title->getDBkey(),
 652                         ),
 653                         __METHOD__
 654                 );
 655                 $result['watchers'] = $watchers;
 656
 657                 // Total number of edits
 658                 $edits = (int)$dbr->selectField(
 659                         'revision',
 660                         'COUNT(rev_page)',
 661                         array( 'rev_page' => $id ),
 662                         __METHOD__
 663                 );
 664                 $result['edits'] = $edits;
 665
 666                 // Total number of distinct authors
 667                 $authors = (int)$dbr->selectField(
 668                         'revision',
 669                         'COUNT(DISTINCT rev_user_text)',
 670                         array( 'rev_page' => $id ),
 671                         __METHOD__
 672                 );
 673                 $result['authors'] = $authors;
 674
 675                 // "Recent" threshold defined by RCMaxAge setting
 676                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 677
 678                 // Recent number of edits
 679                 $edits = (int)$dbr->selectField(
 680                         'revision',
 681                         'COUNT(rev_page)',
 682                         array(
 683                                 'rev_page' => $id,
 684                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 685                         ),
 686                         __METHOD__
 687                 );
 688                 $result['recent_edits'] = $edits;
 689
 690                 // Recent number of distinct authors
 691                 $authors = (int)$dbr->selectField(
 692                         'revision',
 693                         'COUNT(DISTINCT rev_user_text)',
 694                         array(
 695                                 'rev_page' => $id,
 696                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 697                         ),
 698                         __METHOD__
 699                 );
 700                 $result['recent_authors'] = $authors;
 701
 702                 // Subpages (if enabled)
 703                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 704                         $conds = array( 'page_namespace' => $title->getNamespace() );
 705                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 706
 707                         // Subpages of this page (redirects)
 708                         $conds['page_is_redirect'] = 1;
 709                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 710                                 'page',
 711                                 'COUNT(page_id)',
 712                                 $conds,
 713                                 __METHOD__ );
 714
 715                         // Subpages of this page (non-redirects)
 716                         $conds['page_is_redirect'] = 0;
 717                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 718                                 'page',
 719                                 'COUNT(page_id)',
 720                                 $conds,
 721                                 __METHOD__
 722                         );
 723
 724                         // Subpages of this page (total)
 725                         $result['subpages']['total'] = $result['subpages']['redirects']
 726                                 + $result['subpages']['nonredirects'];
 727                 }
 728
 729                 // Counts for the number of transclusion links (to/from)
 730                 if ( $config->get( 'MiserMode' ) ) {
 731                         $result['transclusion']['to'] = 0;
 732                 } else {
 733                         $result['transclusion']['to'] = (int)$dbr->selectField(
 734                                 'templatelinks',
 735                                 'COUNT(tl_from)',
 736                                 array(
 737                                         'tl_namespace' => $title->getNamespace(),
 738                                         'tl_title' => $title->getDBkey()
 739                                 ),
 740                                 __METHOD__
 741                         );
 742                 }
 743
 744                 $result['transclusion']['from'] = (int)$dbr->selectField(
 745                         'templatelinks',
 746                         'COUNT(*)',
 747                         array( 'tl_from' => $title->getArticleID() ),
 748                         __METHOD__
 749                 );
 750
 751                 return $result;
 752         }
 753
 754         /**
 755          * Returns the name that goes in the "<h1>" page title.
 756          *
 757          * @return string
 758          */
 759         protected function getPageTitle() {
 760                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 761         }
 762
 763         /**
 764          * Get a list of contributors of $article
 765          * @return string Html
 766          */
 767         protected function getContributors() {
 768                 $contributors = $this->page->getContributors();
 769                 $real_names = array();
 770                 $user_names = array();
 771                 $anon_ips = array();
 772
 773                 # Sift for real versus user names
 774                 /** @var $user User */
 775                 foreach ( $contributors as $user ) {
 776                         $page = $user->isAnon()
 777                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 778                                 : $user->getUserPage();
 779
 780                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 781                         if ( $user->getID() == 0 ) {
 782                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 783                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 784                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 785                         } else {
 786                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 787                         }
 788                 }
 789
 790                 $lang = $this->getLanguage();
 791
 792                 $real = $lang->listToText( $real_names );
 793
 794                 # "ThisSite user(s) A, B and C"
 795                 if ( count( $user_names ) ) {
 796                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 797                                 count( $user_names ) )->escaped();
 798                 } else {
 799                         $user = false;
 800                 }
 801
 802                 if ( count( $anon_ips ) ) {
 803                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 804                                 count( $anon_ips ) )->escaped();
 805                 } else {
 806                         $anon = false;
 807                 }
 808
 809                 # This is the big list, all mooshed together. We sift for blank strings
 810                 $fulllist = array();
 811                 foreach ( array( $real, $user, $anon ) as $s ) {
 812                         if ( $s !== '' ) {
 813                                 array_push( $fulllist, $s );
 814                         }
 815                 }
 816
 817                 $count = count( $fulllist );
 818
 819                 # "Based on work by ..."
 820                 return $count
 821                         ? $this->msg( 'othercontribs' )->rawParams(
 822                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 823                         : '';
 824         }
 825
 826         /**
 827          * Returns the description that goes below the "<h1>" tag.
 828          *
 829          * @return string
 830          */
 831         protected function getDescription() {
 832                 return '';
 833         }
 834 }