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