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         /**
  32          * Returns the name of the action this object responds to.
  33          *
  34          * @return string lowercase
  35          */
  36         public function getName() {
  37                 return 'info';
  38         }
  39
  40         /**
  41          * Whether this action can still be executed by a blocked user.
  42          *
  43          * @return bool
  44          */
  45         public function requiresUnblock() {
  46                 return false;
  47         }
  48
  49         /**
  50          * Whether this action requires the wiki not to be locked.
  51          *
  52          * @return bool
  53          */
  54         public function requiresWrite() {
  55                 return false;
  56         }
  57
  58         /**
  59          * Clear the info cache for a given Title.
  60          *
  61          * @since 1.22
  62          * @param Title $title Title to clear cache for
  63          */
  64         public static function invalidateCache( Title $title ) {
  65                 global $wgMemc;
  66                 // Clear page info.
  67                 $revision = WikiPage::factory( $title )->getRevision();
  68                 if ( $revision !== null ) {
  69                         $key = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $revision->getId() );
  70                         $wgMemc->delete( $key );
  71                 }
  72         }
  73
  74         /**
  75          * Shows page information on GET request.
  76          *
  77          * @return string Page information that will be added to the output
  78          */
  79         public function onView() {
  80                 $content = '';
  81
  82                 // Validate revision
  83                 $oldid = $this->page->getOldID();
  84                 if ( $oldid ) {
  85                         $revision = $this->page->getRevisionFetched();
  86
  87                         // Revision is missing
  88                         if ( $revision === null ) {
  89                                 return $this->msg( 'missing-revision', $oldid )->parse();
  90                         }
  91
  92                         // Revision is not current
  93                         if ( !$revision->isCurrent() ) {
  94                                 return $this->msg( 'pageinfo-not-current' )->plain();
  95                         }
  96                 }
  97
  98                 // Page header
  99                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 100                         $content .= $this->msg( 'pageinfo-header' )->parse();
 101                 }
 102
 103                 // Hide "This page is a member of # hidden categories" explanation
 104                 $content .= Html::element( 'style', array(),
 105                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 106
 107                 // Hide "Templates used on this page" explanation
 108                 $content .= Html::element( 'style', array(),
 109                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 110
 111                 // Get page information
 112                 $pageInfo = $this->pageInfo();
 113
 114                 // Allow extensions to add additional information
 115                 wfRunHooks( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
 116
 117                 // Render page information
 118                 foreach ( $pageInfo as $header => $infoTable ) {
 119                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 120                         $table = "\n";
 121                         foreach ( $infoTable as $infoRow ) {
 122                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 123                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 124                                 $table = $this->addRow( $table, $name, $value ) . "\n";
 125                         }
 126                         $content = $this->addTable( $content, $table ) . "\n";
 127                 }
 128
 129                 // Page footer
 130                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 131                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 132                 }
 133
 134                 // Page credits
 135                 /*if ( $this->page->exists() ) {
 136                         $content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
 137                 }*/
 138
 139                 return $content;
 140         }
 141
 142         /**
 143          * Creates a header that can be added to the output.
 144          *
 145          * @param string $header The header text.
 146          * @return string The HTML.
 147          */
 148         protected function makeHeader( $header ) {
 149                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 150                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 151         }
 152
 153         /**
 154          * Adds a row to a table that will be added to the content.
 155          *
 156          * @param string $table The table that will be added to the content
 157          * @param string $name The name of the row
 158          * @param string $value The value of the row
 159          * @return string The table with the row added
 160          */
 161         protected function addRow( $table, $name, $value ) {
 162                 return $table . Html::rawElement( 'tr', array(),
 163                         Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
 164                         Html::rawElement( 'td', array(), $value )
 165                 );
 166         }
 167
 168         /**
 169          * Adds a table to the content that will be added to the output.
 170          *
 171          * @param string $content The content that will be added to the output
 172          * @param string $table The table
 173          * @return string The content with the table added
 174          */
 175         protected function addTable( $content, $table ) {
 176                 return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
 177                         $table );
 178         }
 179
 180         /**
 181          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 182          * may add additional information in arbitrary positions. Array values are arrays with one
 183          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 184          *
 185          * @return array
 186          */
 187         protected function pageInfo() {
 188                 global $wgContLang, $wgRCMaxAge, $wgMemc,
 189                         $wgUnwatchedPageThreshold, $wgPageInfoTransclusionLimit;
 190
 191                 $user = $this->getUser();
 192                 $lang = $this->getLanguage();
 193                 $title = $this->getTitle();
 194                 $id = $title->getArticleID();
 195
 196                 $memcKey = wfMemcKey( 'infoaction',
 197                         sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 198                 $pageCounts = $wgMemc->get( $memcKey );
 199                 if ( $pageCounts === false ) {
 200                         // Get page information that would be too "expensive" to retrieve by normal means
 201                         $pageCounts = self::pageCounts( $title );
 202
 203                         $wgMemc->set( $memcKey, $pageCounts );
 204                 }
 205
 206                 // Get page properties
 207                 $dbr = wfGetDB( DB_SLAVE );
 208                 $result = $dbr->select(
 209                         'page_props',
 210                         array( 'pp_propname', 'pp_value' ),
 211                         array( 'pp_page' => $id ),
 212                         __METHOD__
 213                 );
 214
 215                 $pageProperties = array();
 216                 foreach ( $result as $row ) {
 217                         $pageProperties[$row->pp_propname] = $row->pp_value;
 218                 }
 219
 220                 // Basic information
 221                 $pageInfo = array();
 222                 $pageInfo['header-basic'] = array();
 223
 224                 // Display title
 225                 $displayTitle = $title->getPrefixedText();
 226                 if ( !empty( $pageProperties['displaytitle'] ) ) {
 227                         $displayTitle = $pageProperties['displaytitle'];
 228                 }
 229
 230                 $pageInfo['header-basic'][] = array(
 231                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 232                 );
 233
 234                 // Is it a redirect? If so, where to?
 235                 if ( $title->isRedirect() ) {
 236                         $pageInfo['header-basic'][] = array(
 237                                 $this->msg( 'pageinfo-redirectsto' ),
 238                                 Linker::link( $this->page->getRedirectTarget() ) .
 239                                 $this->msg( 'word-separator' )->text() .
 240                                 $this->msg( 'parentheses', Linker::link(
 241                                         $this->page->getRedirectTarget(),
 242                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 243                                         array(),
 244                                         array( 'action' => 'info' )
 245                                 ) )->text()
 246                         );
 247                 }
 248
 249                 // Default sort key
 250                 $sortKey = $title->getCategorySortkey();
 251                 if ( !empty( $pageProperties['defaultsort'] ) ) {
 252                         $sortKey = $pageProperties['defaultsort'];
 253                 }
 254
 255                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 256
 257                 // Page length (in bytes)
 258                 $pageInfo['header-basic'][] = array(
 259                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 260                 );
 261
 262                 // Page ID (number not localised, as it's a database ID)
 263                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 264
 265                 // Language in which the page content is (supposed to be) written
 266                 $pageLang = $title->getPageLanguage()->getCode();
 267                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-language' ),
 268                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 269                         . ' ' . $this->msg( 'parentheses', $pageLang ) );
 270
 271                 // Search engine status
 272                 $pOutput = new ParserOutput();
 273                 if ( isset( $pageProperties['noindex'] ) ) {
 274                         $pOutput->setIndexPolicy( 'noindex' );
 275                 }
 276
 277                 // Use robot policy logic
 278                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 279                 $pageInfo['header-basic'][] = array(
 280                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 281                 );
 282
 283                 if ( isset( $pageCounts['views'] ) ) {
 284                         // Number of views
 285                         $pageInfo['header-basic'][] = array(
 286                                 $this->msg( 'pageinfo-views' ), $lang->formatNum( $pageCounts['views'] )
 287                         );
 288                 }
 289
 290                 if (
 291                         $user->isAllowed( 'unwatchedpages' ) ||
 292                         ( $wgUnwatchedPageThreshold !== false &&
 293                           $pageCounts['watchers'] >= $wgUnwatchedPageThreshold )
 294                 ) {
 295                         // Number of page watchers
 296                         $pageInfo['header-basic'][] = array(
 297                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 298                         );
 299                 } elseif ( $wgUnwatchedPageThreshold !== false ) {
 300                         $pageInfo['header-basic'][] = array(
 301                                 $this->msg( 'pageinfo-watchers' ),
 302                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $wgUnwatchedPageThreshold )
 303                         );
 304                 }
 305
 306                 // Redirects to this page
 307                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 308                 $pageInfo['header-basic'][] = array(
 309                         Linker::link(
 310                                 $whatLinksHere,
 311                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 312                                 array(),
 313                                 array( 'hidelinks' => 1, 'hidetrans' => 1 )
 314                         ),
 315                         $this->msg( 'pageinfo-redirects-value' )
 316                                 ->numParams( count( $title->getRedirectsHere() ) )
 317                 );
 318
 319                 // Is it counted as a content page?
 320                 if ( $this->page->isCountable() ) {
 321                         $pageInfo['header-basic'][] = array(
 322                                 $this->msg( 'pageinfo-contentpage' ),
 323                                 $this->msg( 'pageinfo-contentpage-yes' )
 324                         );
 325                 }
 326
 327                 // Subpages of this page, if subpages are enabled for the current NS
 328                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 329                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 330                         $pageInfo['header-basic'][] = array(
 331                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 332                                 $this->msg( 'pageinfo-subpages-value' )
 333                                         ->numParams(
 334                                                 $pageCounts['subpages']['total'],
 335                                                 $pageCounts['subpages']['redirects'],
 336                                                 $pageCounts['subpages']['nonredirects'] )
 337                         );
 338                 }
 339
 340                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 341                         $category = Category::newFromTitle( $title );
 342                         $pageInfo['category-info'] = array(
 343                                 array(
 344                                         $this->msg( 'pageinfo-category-pages' ),
 345                                         $lang->formatNum( $category->getPageCount() )
 346                                 ),
 347                                 array(
 348                                         $this->msg( 'pageinfo-category-subcats' ),
 349                                         $lang->formatNum( $category->getSubcatCount() )
 350                                 ),
 351                                 array(
 352                                         $this->msg( 'pageinfo-category-files' ),
 353                                         $lang->formatNum( $category->getFileCount() )
 354                                 )
 355                         );
 356                 }
 357
 358                 // Page protection
 359                 $pageInfo['header-restrictions'] = array();
 360
 361                 // Is this page effected by the cascading protection of something which includes it?
 362                 if ( $title->isCascadeProtected() ) {
 363                         $cascadingFrom = '';
 364                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 365
 366                         foreach ( $sources[0] as $sourceTitle ) {
 367                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 368                         }
 369
 370                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 371                         $pageInfo['header-restrictions'][] = array(
 372                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 373                                 $cascadingFrom
 374                         );
 375                 }
 376
 377                 // Is out protection set to cascade to other pages?
 378                 if ( $title->areRestrictionsCascading() ) {
 379                         $pageInfo['header-restrictions'][] = array(
 380                                 $this->msg( 'pageinfo-protect-cascading' ),
 381                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 382                         );
 383                 }
 384
 385                 // Page protection
 386                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 387                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 388
 389                         if ( $protectionLevel == '' ) {
 390                                 // Allow all users
 391                                 $message = $this->msg( 'protect-default' )->escaped();
 392                         } else {
 393                                 // Administrators only
 394                                 $message = $this->msg( "protect-level-$protectionLevel" );
 395                                 if ( $message->isDisabled() ) {
 396                                         // Require "$1" permission
 397                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 398                                 } else {
 399                                         $message = $message->escaped();
 400                                 }
 401                         }
 402
 403                         $pageInfo['header-restrictions'][] = array(
 404                                 $this->msg( "restriction-$restrictionType" ), $message
 405                         );
 406                 }
 407
 408                 if ( !$this->page->exists() ) {
 409                         return $pageInfo;
 410                 }
 411
 412                 // Edit history
 413                 $pageInfo['header-edits'] = array();
 414
 415                 $firstRev = $this->page->getOldestRevision();
 416                 $lastRev = $this->page->getRevision();
 417                 $batch = new LinkBatch;
 418
 419                 if ( $firstRev ) {
 420                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 421                         if ( $firstRevUser !== '' ) {
 422                                 $batch->add( NS_USER, $firstRevUser );
 423                                 $batch->add( NS_USER_TALK, $firstRevUser );
 424                         }
 425                 }
 426
 427                 if ( $lastRev ) {
 428                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 429                         if ( $lastRevUser !== '' ) {
 430                                 $batch->add( NS_USER, $lastRevUser );
 431                                 $batch->add( NS_USER_TALK, $lastRevUser );
 432                         }
 433                 }
 434
 435                 $batch->execute();
 436
 437                 if ( $firstRev ) {
 438                         // Page creator
 439                         $pageInfo['header-edits'][] = array(
 440                                 $this->msg( 'pageinfo-firstuser' ),
 441                                 Linker::revUserTools( $firstRev )
 442                         );
 443
 444                         // Date of page creation
 445                         $pageInfo['header-edits'][] = array(
 446                                 $this->msg( 'pageinfo-firsttime' ),
 447                                 Linker::linkKnown(
 448                                         $title,
 449                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 450                                         array(),
 451                                         array( 'oldid' => $firstRev->getId() )
 452                                 )
 453                         );
 454                 }
 455
 456                 if ( $lastRev ) {
 457                         // Latest editor
 458                         $pageInfo['header-edits'][] = array(
 459                                 $this->msg( 'pageinfo-lastuser' ),
 460                                 Linker::revUserTools( $lastRev )
 461                         );
 462
 463                         // Date of latest edit
 464                         $pageInfo['header-edits'][] = array(
 465                                 $this->msg( 'pageinfo-lasttime' ),
 466                                 Linker::linkKnown(
 467                                         $title,
 468                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 469                                         array(),
 470                                         array( 'oldid' => $this->page->getLatest() )
 471                                 )
 472                         );
 473                 }
 474
 475                 // Total number of edits
 476                 $pageInfo['header-edits'][] = array(
 477                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 478                 );
 479
 480                 // Total number of distinct authors
 481                 $pageInfo['header-edits'][] = array(
 482                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 483                 );
 484
 485                 // Recent number of edits (within past 30 days)
 486                 $pageInfo['header-edits'][] = array(
 487                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $wgRCMaxAge ) ),
 488                         $lang->formatNum( $pageCounts['recent_edits'] )
 489                 );
 490
 491                 // Recent number of distinct authors
 492                 $pageInfo['header-edits'][] = array(
 493                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 494                 );
 495
 496                 // Array of MagicWord objects
 497                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 498
 499                 // Array of magic word IDs
 500                 $wordIDs = $magicWords->names;
 501
 502                 // Array of IDs => localized magic words
 503                 $localizedWords = $wgContLang->getMagicWords();
 504
 505                 $listItems = array();
 506                 foreach ( $pageProperties as $property => $value ) {
 507                         if ( in_array( $property, $wordIDs ) ) {
 508                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 509                         }
 510                 }
 511
 512                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 513                 $hiddenCategories = $this->page->getHiddenCategories();
 514
 515                 if (
 516                         count( $listItems ) > 0 ||
 517                         count( $hiddenCategories ) > 0 ||
 518                         $pageCounts['transclusion']['from'] > 0 ||
 519                         $pageCounts['transclusion']['to'] > 0
 520                 ) {
 521                         $options = array( 'LIMIT' => $wgPageInfoTransclusionLimit );
 522                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 523                         $transcludedTargets = $title->getTemplateLinksTo( $options );
 524
 525                         // Page properties
 526                         $pageInfo['header-properties'] = array();
 527
 528                         // Magic words
 529                         if ( count( $listItems ) > 0 ) {
 530                                 $pageInfo['header-properties'][] = array(
 531                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 532                                         $localizedList
 533                                 );
 534                         }
 535
 536                         // Hidden categories
 537                         if ( count( $hiddenCategories ) > 0 ) {
 538                                 $pageInfo['header-properties'][] = array(
 539                                         $this->msg( 'pageinfo-hidden-categories' )
 540                                                 ->numParams( count( $hiddenCategories ) ),
 541                                         Linker::formatHiddenCategories( $hiddenCategories )
 542                                 );
 543                         }
 544
 545                         // Transcluded templates
 546                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 547                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 548                                         $more = $this->msg( 'morenotlisted' )->escaped();
 549                                 } else {
 550                                         $more = null;
 551                                 }
 552
 553                                 $pageInfo['header-properties'][] = array(
 554                                         $this->msg( 'pageinfo-templates' )
 555                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 556                                         Linker::formatTemplates(
 557                                                 $transcludedTemplates,
 558                                                 false,
 559                                                 false,
 560                                                 $more )
 561                                 );
 562                         }
 563
 564                         if ( $pageCounts['transclusion']['to'] > 0 ) {
 565                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 566                                         $more = Linker::link(
 567                                                 $whatLinksHere,
 568                                                 $this->msg( 'moredotdotdot' )->escaped(),
 569                                                 array(),
 570                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 571                                         );
 572                                 } else {
 573                                         $more = null;
 574                                 }
 575
 576                                 $pageInfo['header-properties'][] = array(
 577                                         $this->msg( 'pageinfo-transclusions' )
 578                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 579                                         Linker::formatTemplates(
 580                                                 $transcludedTargets,
 581                                                 false,
 582                                                 false,
 583                                                 $more )
 584                                 );
 585                         }
 586                 }
 587
 588                 return $pageInfo;
 589         }
 590
 591         /**
 592          * Returns page counts that would be too "expensive" to retrieve by normal means.
 593          *
 594          * @param Title $title Title to get counts for
 595          * @return array
 596          */
 597         protected static function pageCounts( Title $title ) {
 598                 global $wgRCMaxAge, $wgDisableCounters;
 599
 600                 wfProfileIn( __METHOD__ );
 601                 $id = $title->getArticleID();
 602
 603                 $dbr = wfGetDB( DB_SLAVE );
 604                 $result = array();
 605
 606                 if ( !$wgDisableCounters ) {
 607                         // Number of views
 608                         $views = (int) $dbr->selectField(
 609                                 'page',
 610                                 'page_counter',
 611                                 array( 'page_id' => $id ),
 612                                 __METHOD__
 613                         );
 614                         $result['views'] = $views;
 615                 }
 616
 617                 // Number of page watchers
 618                 $watchers = (int) $dbr->selectField(
 619                         'watchlist',
 620                         'COUNT(*)',
 621                         array(
 622                                 'wl_namespace' => $title->getNamespace(),
 623                                 'wl_title' => $title->getDBkey(),
 624                         ),
 625                         __METHOD__
 626                 );
 627                 $result['watchers'] = $watchers;
 628
 629                 // Total number of edits
 630                 $edits = (int) $dbr->selectField(
 631                         'revision',
 632                         'COUNT(rev_page)',
 633                         array( 'rev_page' => $id ),
 634                         __METHOD__
 635                 );
 636                 $result['edits'] = $edits;
 637
 638                 // Total number of distinct authors
 639                 $authors = (int) $dbr->selectField(
 640                         'revision',
 641                         'COUNT(DISTINCT rev_user_text)',
 642                         array( 'rev_page' => $id ),
 643                         __METHOD__
 644                 );
 645                 $result['authors'] = $authors;
 646
 647                 // "Recent" threshold defined by $wgRCMaxAge
 648                 $threshold = $dbr->timestamp( time() - $wgRCMaxAge );
 649
 650                 // Recent number of edits
 651                 $edits = (int) $dbr->selectField(
 652                         'revision',
 653                         'COUNT(rev_page)',
 654                         array(
 655                                 'rev_page' => $id,
 656                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 657                         ),
 658                         __METHOD__
 659                 );
 660                 $result['recent_edits'] = $edits;
 661
 662                 // Recent number of distinct authors
 663                 $authors = (int) $dbr->selectField(
 664                         'revision',
 665                         'COUNT(DISTINCT rev_user_text)',
 666                         array(
 667                                 'rev_page' => $id,
 668                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 669                         ),
 670                         __METHOD__
 671                 );
 672                 $result['recent_authors'] = $authors;
 673
 674                 // Subpages (if enabled)
 675                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 676                         $conds = array( 'page_namespace' => $title->getNamespace() );
 677                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 678
 679                         // Subpages of this page (redirects)
 680                         $conds['page_is_redirect'] = 1;
 681                         $result['subpages']['redirects'] = (int) $dbr->selectField(
 682                                 'page',
 683                                 'COUNT(page_id)',
 684                                 $conds,
 685                                 __METHOD__ );
 686
 687                         // Subpages of this page (non-redirects)
 688                         $conds['page_is_redirect'] = 0;
 689                         $result['subpages']['nonredirects'] = (int) $dbr->selectField(
 690                                 'page',
 691                                 'COUNT(page_id)',
 692                                 $conds,
 693                                 __METHOD__
 694                         );
 695
 696                         // Subpages of this page (total)
 697                         $result['subpages']['total'] = $result['subpages']['redirects']
 698                                 + $result['subpages']['nonredirects'];
 699                 }
 700
 701                 // Counts for the number of transclusion links (to/from)
 702                 $result['transclusion']['to'] = (int) $dbr->selectField(
 703                         'templatelinks',
 704                         'COUNT(tl_from)',
 705                         array(
 706                                 'tl_namespace' => $title->getNamespace(),
 707                                 'tl_title' => $title->getDBkey()
 708                         ),
 709                         __METHOD__
 710                 );
 711
 712                 $result['transclusion']['from'] = (int) $dbr->selectField(
 713                         'templatelinks',
 714                         'COUNT(*)',
 715                         array( 'tl_from' => $title->getArticleID() ),
 716                         __METHOD__
 717                 );
 718
 719                 wfProfileOut( __METHOD__ );
 720                 return $result;
 721         }
 722
 723         /**
 724          * Returns the name that goes in the "<h1>" page title.
 725          *
 726          * @return string
 727          */
 728         protected function getPageTitle() {
 729                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 730         }
 731
 732         /**
 733          * Get a list of contributors of $article
 734          * @return string: html
 735          */
 736         protected function getContributors() {
 737                 global $wgHiddenPrefs;
 738
 739                 $contributors = $this->page->getContributors();
 740                 $real_names = array();
 741                 $user_names = array();
 742                 $anon_ips = array();
 743
 744                 # Sift for real versus user names
 745                 foreach ( $contributors as $user ) {
 746                         $page = $user->isAnon()
 747                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 748                                 : $user->getUserPage();
 749
 750                         if ( $user->getID() == 0 ) {
 751                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 752                         } elseif ( !in_array( 'realname', $wgHiddenPrefs ) && $user->getRealName() ) {
 753                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 754                         } else {
 755                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 756                         }
 757                 }
 758
 759                 $lang = $this->getLanguage();
 760
 761                 $real = $lang->listToText( $real_names );
 762
 763                 # "ThisSite user(s) A, B and C"
 764                 if ( count( $user_names ) ) {
 765                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 766                                 count( $user_names ) )->escaped();
 767                 } else {
 768                         $user = false;
 769                 }
 770
 771                 if ( count( $anon_ips ) ) {
 772                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 773                                 count( $anon_ips ) )->escaped();
 774                 } else {
 775                         $anon = false;
 776                 }
 777
 778                 # This is the big list, all mooshed together. We sift for blank strings
 779                 $fulllist = array();
 780                 foreach ( array( $real, $user, $anon ) as $s ) {
 781                         if ( $s !== '' ) {
 782                                 array_push( $fulllist, $s );
 783                         }
 784                 }
 785
 786                 $count = count( $fulllist );
 787                 # "Based on work by ..."
 788                 return $count
 789                         ? $this->msg( 'othercontribs' )->rawParams(
 790                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 791                         : '';
 792         }
 793
 794         /**
 795          * Returns the description that goes below the "<h1>" tag.
 796          *
 797          * @return string
 798          */
 799         protected function getDescription() {
 800                 return '';
 801         }
 802 }