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                 $cache = ObjectCache::getMainWANInstance();
  68
  69                 $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
  70                 if ( $revision !== null ) {
  71                         $key = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $revision->getId() );
  72                         $cache->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;
 197
 198                 $user = $this->getUser();
 199                 $lang = $this->getLanguage();
 200                 $title = $this->getTitle();
 201                 $id = $title->getArticleID();
 202                 $config = $this->context->getConfig();
 203
 204                 $cache = ObjectCache::getMainWANInstance();
 205                 $memcKey = wfMemcKey( 'infoaction',
 206                         sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 207                 $pageCounts = $cache->get( $memcKey );
 208                 $version = isset( $pageCounts['cacheversion'] ) ? $pageCounts['cacheversion'] : false;
 209                 if ( $pageCounts === false || $version !== self::CACHE_VERSION ) {
 210                         // Get page information that would be too "expensive" to retrieve by normal means
 211                         $pageCounts = $this->pageCounts( $title );
 212                         $pageCounts['cacheversion'] = self::CACHE_VERSION;
 213
 214                         $cache->set( $memcKey, $pageCounts );
 215                 }
 216
 217                 // Get page properties
 218                 $dbr = wfGetDB( DB_SLAVE );
 219                 $result = $dbr->select(
 220                         'page_props',
 221                         array( 'pp_propname', 'pp_value' ),
 222                         array( 'pp_page' => $id ),
 223                         __METHOD__
 224                 );
 225
 226                 $pageProperties = array();
 227                 foreach ( $result as $row ) {
 228                         $pageProperties[$row->pp_propname] = $row->pp_value;
 229                 }
 230
 231                 // Basic information
 232                 $pageInfo = array();
 233                 $pageInfo['header-basic'] = array();
 234
 235                 // Display title
 236                 $displayTitle = $title->getPrefixedText();
 237                 if ( isset( $pageProperties['displaytitle'] ) ) {
 238                         $displayTitle = $pageProperties['displaytitle'];
 239                 }
 240
 241                 $pageInfo['header-basic'][] = array(
 242                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 243                 );
 244
 245                 // Is it a redirect? If so, where to?
 246                 if ( $title->isRedirect() ) {
 247                         $pageInfo['header-basic'][] = array(
 248                                 $this->msg( 'pageinfo-redirectsto' ),
 249                                 Linker::link( $this->page->getRedirectTarget() ) .
 250                                 $this->msg( 'word-separator' )->escaped() .
 251                                 $this->msg( 'parentheses' )->rawParams( Linker::link(
 252                                         $this->page->getRedirectTarget(),
 253                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 254                                         array(),
 255                                         array( 'action' => 'info' )
 256                                 ) )->escaped()
 257                         );
 258                 }
 259
 260                 // Default sort key
 261                 $sortKey = $title->getCategorySortkey();
 262                 if ( isset( $pageProperties['defaultsort'] ) ) {
 263                         $sortKey = $pageProperties['defaultsort'];
 264                 }
 265
 266                 $sortKey = htmlspecialchars( $sortKey );
 267                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 268
 269                 // Page length (in bytes)
 270                 $pageInfo['header-basic'][] = array(
 271                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 272                 );
 273
 274                 // Page ID (number not localised, as it's a database ID)
 275                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 276
 277                 // Language in which the page content is (supposed to be) written
 278                 $pageLang = $title->getPageLanguage()->getCode();
 279
 280                 if ( $config->get( 'PageLanguageUseDB' )
 281                         && $this->getTitle()->userCan( 'pagelang', $this->getUser() )
 282                 ) {
 283                         // Link to Special:PageLanguage with pre-filled page title if user has permissions
 284                         $titleObj = SpecialPage::getTitleFor( 'PageLanguage', $title->getPrefixedText() );
 285                         $langDisp = Linker::link(
 286                                 $titleObj,
 287                                 $this->msg( 'pageinfo-language' )->escaped()
 288                         );
 289                 } else {
 290                         // Display just the message
 291                         $langDisp = $this->msg( 'pageinfo-language' )->escaped();
 292                 }
 293
 294                 $pageInfo['header-basic'][] = array( $langDisp,
 295                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 296                         . ' ' . $this->msg( 'parentheses', $pageLang )->escaped() );
 297
 298                 // Content model of the page
 299                 $pageInfo['header-basic'][] = array(
 300                         $this->msg( 'pageinfo-content-model' ),
 301                         htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) )
 302                 );
 303
 304                 // Search engine status
 305                 $pOutput = new ParserOutput();
 306                 if ( isset( $pageProperties['noindex'] ) ) {
 307                         $pOutput->setIndexPolicy( 'noindex' );
 308                 }
 309                 if ( isset( $pageProperties['index'] ) ) {
 310                         $pOutput->setIndexPolicy( 'index' );
 311                 }
 312
 313                 // Use robot policy logic
 314                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 315                 $pageInfo['header-basic'][] = array(
 316                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 317                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 318                 );
 319
 320                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 321                 if (
 322                         $user->isAllowed( 'unwatchedpages' ) ||
 323                         ( $unwatchedPageThreshold !== false &&
 324                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 325                 ) {
 326                         // Number of page watchers
 327                         $pageInfo['header-basic'][] = array(
 328                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 329                         );
 330                 } elseif ( $unwatchedPageThreshold !== false ) {
 331                         $pageInfo['header-basic'][] = array(
 332                                 $this->msg( 'pageinfo-watchers' ),
 333                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 334                         );
 335                 }
 336
 337                 // Redirects to this page
 338                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 339                 $pageInfo['header-basic'][] = array(
 340                         Linker::link(
 341                                 $whatLinksHere,
 342                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 343                                 array(),
 344                                 array(
 345                                         'hidelinks' => 1,
 346                                         'hidetrans' => 1,
 347                                         'hideimages' => $title->getNamespace() == NS_FILE
 348                                 )
 349                         ),
 350                         $this->msg( 'pageinfo-redirects-value' )
 351                                 ->numParams( count( $title->getRedirectsHere() ) )
 352                 );
 353
 354                 // Is it counted as a content page?
 355                 if ( $this->page->isCountable() ) {
 356                         $pageInfo['header-basic'][] = array(
 357                                 $this->msg( 'pageinfo-contentpage' ),
 358                                 $this->msg( 'pageinfo-contentpage-yes' )
 359                         );
 360                 }
 361
 362                 // Subpages of this page, if subpages are enabled for the current NS
 363                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 364                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 365                         $pageInfo['header-basic'][] = array(
 366                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 367                                 $this->msg( 'pageinfo-subpages-value' )
 368                                         ->numParams(
 369                                                 $pageCounts['subpages']['total'],
 370                                                 $pageCounts['subpages']['redirects'],
 371                                                 $pageCounts['subpages']['nonredirects'] )
 372                         );
 373                 }
 374
 375                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 376                         $category = Category::newFromTitle( $title );
 377
 378                         // $allCount is the total number of cat members,
 379                         // not the count of how many members are normal pages.
 380                         $allCount = (int)$category->getPageCount();
 381                         $subcatCount = (int)$category->getSubcatCount();
 382                         $fileCount = (int)$category->getFileCount();
 383                         $pagesCount = $allCount - $subcatCount - $fileCount;
 384
 385                         $pageInfo['category-info'] = array(
 386                                 array(
 387                                         $this->msg( 'pageinfo-category-total' ),
 388                                         $lang->formatNum( $allCount )
 389                                 ),
 390                                 array(
 391                                         $this->msg( 'pageinfo-category-pages' ),
 392                                         $lang->formatNum( $pagesCount )
 393                                 ),
 394                                 array(
 395                                         $this->msg( 'pageinfo-category-subcats' ),
 396                                         $lang->formatNum( $subcatCount )
 397                                 ),
 398                                 array(
 399                                         $this->msg( 'pageinfo-category-files' ),
 400                                         $lang->formatNum( $fileCount )
 401                                 )
 402                         );
 403                 }
 404
 405                 // Page protection
 406                 $pageInfo['header-restrictions'] = array();
 407
 408                 // Is this page affected by the cascading protection of something which includes it?
 409                 if ( $title->isCascadeProtected() ) {
 410                         $cascadingFrom = '';
 411                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 412
 413                         foreach ( $sources[0] as $sourceTitle ) {
 414                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 415                         }
 416
 417                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 418                         $pageInfo['header-restrictions'][] = array(
 419                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 420                                 $cascadingFrom
 421                         );
 422                 }
 423
 424                 // Is out protection set to cascade to other pages?
 425                 if ( $title->areRestrictionsCascading() ) {
 426                         $pageInfo['header-restrictions'][] = array(
 427                                 $this->msg( 'pageinfo-protect-cascading' ),
 428                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 429                         );
 430                 }
 431
 432                 // Page protection
 433                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 434                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 435
 436                         if ( $protectionLevel == '' ) {
 437                                 // Allow all users
 438                                 $message = $this->msg( 'protect-default' )->escaped();
 439                         } else {
 440                                 // Administrators only
 441                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 442                                 $message = $this->msg( "protect-level-$protectionLevel" );
 443                                 if ( $message->isDisabled() ) {
 444                                         // Require "$1" permission
 445                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 446                                 } else {
 447                                         $message = $message->escaped();
 448                                 }
 449                         }
 450                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 451                         $formattedexpiry = $this->msg( 'parentheses',
 452                                 $this->getLanguage()->formatExpiry( $expiry ) )->escaped();
 453                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 454
 455                         // Messages: restriction-edit, restriction-move, restriction-create,
 456                         // restriction-upload
 457                         $pageInfo['header-restrictions'][] = array(
 458                                 $this->msg( "restriction-$restrictionType" ), $message
 459                         );
 460                 }
 461
 462                 if ( !$this->page->exists() ) {
 463                         return $pageInfo;
 464                 }
 465
 466                 // Edit history
 467                 $pageInfo['header-edits'] = array();
 468
 469                 $firstRev = $this->page->getOldestRevision();
 470                 $lastRev = $this->page->getRevision();
 471                 $batch = new LinkBatch;
 472
 473                 if ( $firstRev ) {
 474                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 475                         if ( $firstRevUser !== '' ) {
 476                                 $batch->add( NS_USER, $firstRevUser );
 477                                 $batch->add( NS_USER_TALK, $firstRevUser );
 478                         }
 479                 }
 480
 481                 if ( $lastRev ) {
 482                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 483                         if ( $lastRevUser !== '' ) {
 484                                 $batch->add( NS_USER, $lastRevUser );
 485                                 $batch->add( NS_USER_TALK, $lastRevUser );
 486                         }
 487                 }
 488
 489                 $batch->execute();
 490
 491                 if ( $firstRev ) {
 492                         // Page creator
 493                         $pageInfo['header-edits'][] = array(
 494                                 $this->msg( 'pageinfo-firstuser' ),
 495                                 Linker::revUserTools( $firstRev )
 496                         );
 497
 498                         // Date of page creation
 499                         $pageInfo['header-edits'][] = array(
 500                                 $this->msg( 'pageinfo-firsttime' ),
 501                                 Linker::linkKnown(
 502                                         $title,
 503                                         htmlspecialchars( $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ) ),
 504                                         array(),
 505                                         array( 'oldid' => $firstRev->getId() )
 506                                 )
 507                         );
 508                 }
 509
 510                 if ( $lastRev ) {
 511                         // Latest editor
 512                         $pageInfo['header-edits'][] = array(
 513                                 $this->msg( 'pageinfo-lastuser' ),
 514                                 Linker::revUserTools( $lastRev )
 515                         );
 516
 517                         // Date of latest edit
 518                         $pageInfo['header-edits'][] = array(
 519                                 $this->msg( 'pageinfo-lasttime' ),
 520                                 Linker::linkKnown(
 521                                         $title,
 522                                         htmlspecialchars( $lang->userTimeAndDate( $this->page->getTimestamp(), $user ) ),
 523                                         array(),
 524                                         array( 'oldid' => $this->page->getLatest() )
 525                                 )
 526                         );
 527                 }
 528
 529                 // Total number of edits
 530                 $pageInfo['header-edits'][] = array(
 531                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 532                 );
 533
 534                 // Total number of distinct authors
 535                 $pageInfo['header-edits'][] = array(
 536                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 537                 );
 538
 539                 // Recent number of edits (within past 30 days)
 540                 $pageInfo['header-edits'][] = array(
 541                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 542                         $lang->formatNum( $pageCounts['recent_edits'] )
 543                 );
 544
 545                 // Recent number of distinct authors
 546                 $pageInfo['header-edits'][] = array(
 547                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 548                 );
 549
 550                 // Array of MagicWord objects
 551                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 552
 553                 // Array of magic word IDs
 554                 $wordIDs = $magicWords->names;
 555
 556                 // Array of IDs => localized magic words
 557                 $localizedWords = $wgContLang->getMagicWords();
 558
 559                 $listItems = array();
 560                 foreach ( $pageProperties as $property => $value ) {
 561                         if ( in_array( $property, $wordIDs ) ) {
 562                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 563                         }
 564                 }
 565
 566                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 567                 $hiddenCategories = $this->page->getHiddenCategories();
 568
 569                 if (
 570                         count( $listItems ) > 0 ||
 571                         count( $hiddenCategories ) > 0 ||
 572                         $pageCounts['transclusion']['from'] > 0 ||
 573                         $pageCounts['transclusion']['to'] > 0
 574                 ) {
 575                         $options = array( 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) );
 576                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 577                         if ( $config->get( 'MiserMode' ) ) {
 578                                 $transcludedTargets = array();
 579                         } else {
 580                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 581                         }
 582
 583                         // Page properties
 584                         $pageInfo['header-properties'] = array();
 585
 586                         // Magic words
 587                         if ( count( $listItems ) > 0 ) {
 588                                 $pageInfo['header-properties'][] = array(
 589                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 590                                         $localizedList
 591                                 );
 592                         }
 593
 594                         // Hidden categories
 595                         if ( count( $hiddenCategories ) > 0 ) {
 596                                 $pageInfo['header-properties'][] = array(
 597                                         $this->msg( 'pageinfo-hidden-categories' )
 598                                                 ->numParams( count( $hiddenCategories ) ),
 599                                         Linker::formatHiddenCategories( $hiddenCategories )
 600                                 );
 601                         }
 602
 603                         // Transcluded templates
 604                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 605                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 606                                         $more = $this->msg( 'morenotlisted' )->escaped();
 607                                 } else {
 608                                         $more = null;
 609                                 }
 610
 611                                 $pageInfo['header-properties'][] = array(
 612                                         $this->msg( 'pageinfo-templates' )
 613                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 614                                         Linker::formatTemplates(
 615                                                 $transcludedTemplates,
 616                                                 false,
 617                                                 false,
 618                                                 $more )
 619                                 );
 620                         }
 621
 622                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 623                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 624                                         $more = Linker::link(
 625                                                 $whatLinksHere,
 626                                                 $this->msg( 'moredotdotdot' )->escaped(),
 627                                                 array(),
 628                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 629                                         );
 630                                 } else {
 631                                         $more = null;
 632                                 }
 633
 634                                 $pageInfo['header-properties'][] = array(
 635                                         $this->msg( 'pageinfo-transclusions' )
 636                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 637                                         Linker::formatTemplates(
 638                                                 $transcludedTargets,
 639                                                 false,
 640                                                 false,
 641                                                 $more )
 642                                 );
 643                         }
 644                 }
 645
 646                 return $pageInfo;
 647         }
 648
 649         /**
 650          * Returns page counts that would be too "expensive" to retrieve by normal means.
 651          *
 652          * @param Title $title Title to get counts for
 653          * @return array
 654          */
 655         protected function pageCounts( Title $title ) {
 656                 $id = $title->getArticleID();
 657                 $config = $this->context->getConfig();
 658
 659                 $dbr = wfGetDB( DB_SLAVE );
 660                 $result = array();
 661
 662                 // Number of page watchers
 663                 $watchers = (int)$dbr->selectField(
 664                         'watchlist',
 665                         'COUNT(*)',
 666                         array(
 667                                 'wl_namespace' => $title->getNamespace(),
 668                                 'wl_title' => $title->getDBkey(),
 669                         ),
 670                         __METHOD__
 671                 );
 672                 $result['watchers'] = $watchers;
 673
 674                 // Total number of edits
 675                 $edits = (int)$dbr->selectField(
 676                         'revision',
 677                         'COUNT(rev_page)',
 678                         array( 'rev_page' => $id ),
 679                         __METHOD__
 680                 );
 681                 $result['edits'] = $edits;
 682
 683                 // Total number of distinct authors
 684                 $authors = (int)$dbr->selectField(
 685                         'revision',
 686                         'COUNT(DISTINCT rev_user_text)',
 687                         array( 'rev_page' => $id ),
 688                         __METHOD__
 689                 );
 690                 $result['authors'] = $authors;
 691
 692                 // "Recent" threshold defined by RCMaxAge setting
 693                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 694
 695                 // Recent number of edits
 696                 $edits = (int)$dbr->selectField(
 697                         'revision',
 698                         'COUNT(rev_page)',
 699                         array(
 700                                 'rev_page' => $id,
 701                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 702                         ),
 703                         __METHOD__
 704                 );
 705                 $result['recent_edits'] = $edits;
 706
 707                 // Recent number of distinct authors
 708                 $authors = (int)$dbr->selectField(
 709                         'revision',
 710                         'COUNT(DISTINCT rev_user_text)',
 711                         array(
 712                                 'rev_page' => $id,
 713                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 714                         ),
 715                         __METHOD__
 716                 );
 717                 $result['recent_authors'] = $authors;
 718
 719                 // Subpages (if enabled)
 720                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 721                         $conds = array( 'page_namespace' => $title->getNamespace() );
 722                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 723
 724                         // Subpages of this page (redirects)
 725                         $conds['page_is_redirect'] = 1;
 726                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 727                                 'page',
 728                                 'COUNT(page_id)',
 729                                 $conds,
 730                                 __METHOD__ );
 731
 732                         // Subpages of this page (non-redirects)
 733                         $conds['page_is_redirect'] = 0;
 734                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 735                                 'page',
 736                                 'COUNT(page_id)',
 737                                 $conds,
 738                                 __METHOD__
 739                         );
 740
 741                         // Subpages of this page (total)
 742                         $result['subpages']['total'] = $result['subpages']['redirects']
 743                                 + $result['subpages']['nonredirects'];
 744                 }
 745
 746                 // Counts for the number of transclusion links (to/from)
 747                 if ( $config->get( 'MiserMode' ) ) {
 748                         $result['transclusion']['to'] = 0;
 749                 } else {
 750                         $result['transclusion']['to'] = (int)$dbr->selectField(
 751                                 'templatelinks',
 752                                 'COUNT(tl_from)',
 753                                 array(
 754                                         'tl_namespace' => $title->getNamespace(),
 755                                         'tl_title' => $title->getDBkey()
 756                                 ),
 757                                 __METHOD__
 758                         );
 759                 }
 760
 761                 $result['transclusion']['from'] = (int)$dbr->selectField(
 762                         'templatelinks',
 763                         'COUNT(*)',
 764                         array( 'tl_from' => $title->getArticleID() ),
 765                         __METHOD__
 766                 );
 767
 768                 return $result;
 769         }
 770
 771         /**
 772          * Returns the name that goes in the "<h1>" page title.
 773          *
 774          * @return string
 775          */
 776         protected function getPageTitle() {
 777                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 778         }
 779
 780         /**
 781          * Get a list of contributors of $article
 782          * @return string Html
 783          */
 784         protected function getContributors() {
 785                 $contributors = $this->page->getContributors();
 786                 $real_names = array();
 787                 $user_names = array();
 788                 $anon_ips = array();
 789
 790                 # Sift for real versus user names
 791                 /** @var $user User */
 792                 foreach ( $contributors as $user ) {
 793                         $page = $user->isAnon()
 794                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 795                                 : $user->getUserPage();
 796
 797                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 798                         if ( $user->getID() == 0 ) {
 799                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 800                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 801                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 802                         } else {
 803                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 804                         }
 805                 }
 806
 807                 $lang = $this->getLanguage();
 808
 809                 $real = $lang->listToText( $real_names );
 810
 811                 # "ThisSite user(s) A, B and C"
 812                 if ( count( $user_names ) ) {
 813                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 814                                 count( $user_names ) )->escaped();
 815                 } else {
 816                         $user = false;
 817                 }
 818
 819                 if ( count( $anon_ips ) ) {
 820                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 821                                 count( $anon_ips ) )->escaped();
 822                 } else {
 823                         $anon = false;
 824                 }
 825
 826                 # This is the big list, all mooshed together. We sift for blank strings
 827                 $fulllist = array();
 828                 foreach ( array( $real, $user, $anon ) as $s ) {
 829                         if ( $s !== '' ) {
 830                                 array_push( $fulllist, $s );
 831                         }
 832                 }
 833
 834                 $count = count( $fulllist );
 835
 836                 # "Based on work by ..."
 837                 return $count
 838                         ? $this->msg( 'othercontribs' )->rawParams(
 839                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 840                         : '';
 841         }
 842
 843         /**
 844          * Returns the description that goes below the "<h1>" tag.
 845          *
 846          * @return string
 847          */
 848         protected function getDescription() {
 849                 return '';
 850         }
 851 }