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 class InfoAction extends FormlessAction {
  26         /**
  27          * Returns the name of the action this object responds to.
  28          *
  29          * @return string lowercase
  30          */
  31         public function getName() {
  32                 return 'info';
  33         }
  34
  35         /**
  36          * Whether this action can still be executed by a blocked user.
  37          *
  38          * @return bool
  39          */
  40         public function requiresUnblock() {
  41                 return false;
  42         }
  43
  44         /**
  45          * Whether this action requires the wiki not to be locked.
  46          *
  47          * @return bool
  48          */
  49         public function requiresWrite() {
  50                 return false;
  51         }
  52
  53         /**
  54          * Shows page information on GET request.
  55          *
  56          * @return string Page information that will be added to the output
  57          */
  58         public function onView() {
  59                 $content = '';
  60
  61                 // Validate revision
  62                 $oldid = $this->page->getOldID();
  63                 if ( $oldid ) {
  64                         $revision = $this->page->getRevisionFetched();
  65
  66                         // Revision is missing
  67                         if ( $revision === null ) {
  68                                 return $this->msg( 'missing-revision', $oldid )->parse();
  69                         }
  70
  71                         // Revision is not current
  72                         if ( !$revision->isCurrent() ) {
  73                                 return $this->msg( 'pageinfo-not-current' )->plain();
  74                         }
  75                 }
  76
  77                 // Page header
  78                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
  79                         $content .= $this->msg( 'pageinfo-header' )->parse();
  80                 }
  81
  82                 // Hide "This page is a member of # hidden categories" explanation
  83                 $content .= Html::element( 'style', array(),
  84                         '.mw-hiddenCategoriesExplanation { display: none; }' );
  85
  86                 // Hide "Templates used on this page" explanation
  87                 $content .= Html::element( 'style', array(),
  88                         '.mw-templatesUsedExplanation { display: none; }' );
  89
  90                 // Get page information
  91                 $pageInfo = $this->pageInfo();
  92
  93                 // Allow extensions to add additional information
  94                 wfRunHooks( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
  95
  96                 // Render page information
  97                 foreach ( $pageInfo as $header => $infoTable ) {
  98                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() );
  99                         $table = '';
 100                         foreach ( $infoTable as $infoRow ) {
 101                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 102                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 103                                 $table = $this->addRow( $table, $name, $value );
 104                         }
 105                         $content = $this->addTable( $content, $table );
 106                 }
 107
 108                 // Page footer
 109                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 110                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 111                 }
 112
 113                 // Page credits
 114                 /*if ( $this->page->exists() ) {
 115                         $content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
 116                 }*/
 117
 118                 return $content;
 119         }
 120
 121         /**
 122          * Creates a header that can be added to the output.
 123          *
 124          * @param $header The header text.
 125          * @return string The HTML.
 126          */
 127         protected function makeHeader( $header ) {
 128                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 129                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 130         }
 131
 132         /**
 133          * Adds a row to a table that will be added to the content.
 134          *
 135          * @param $table string The table that will be added to the content
 136          * @param $name string The name of the row
 137          * @param $value string The value of the row
 138          * @return string The table with the row added
 139          */
 140         protected function addRow( $table, $name, $value ) {
 141                 return $table . Html::rawElement( 'tr', array(),
 142                         Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
 143                         Html::rawElement( 'td', array(), $value )
 144                 );
 145         }
 146
 147         /**
 148          * Adds a table to the content that will be added to the output.
 149          *
 150          * @param $content string The content that will be added to the output
 151          * @param $table string The table
 152          * @return string The content with the table added
 153          */
 154         protected function addTable( $content, $table ) {
 155                 return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
 156                         $table );
 157         }
 158
 159         /**
 160          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 161          * may add additional information in arbitrary positions. Array values are arrays with one
 162          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 163          *
 164          * @return array
 165          */
 166         protected function pageInfo() {
 167                 global $wgContLang, $wgRCMaxAge, $wgMemc, $wgUnwatchedPageThreshold, $wgPageInfoTransclusionLimit;
 168
 169                 $user = $this->getUser();
 170                 $lang = $this->getLanguage();
 171                 $title = $this->getTitle();
 172                 $id = $title->getArticleID();
 173
 174                 $memcKey = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 175                 $pageCounts = $wgMemc->get( $memcKey );
 176                 if ( $pageCounts === false ) {
 177                         // Get page information that would be too "expensive" to retrieve by normal means
 178                         $pageCounts = self::pageCounts( $title );
 179
 180                         $wgMemc->set( $memcKey, $pageCounts );
 181                 }
 182
 183                 // Get page properties
 184                 $dbr = wfGetDB( DB_SLAVE );
 185                 $result = $dbr->select(
 186                         'page_props',
 187                         array( 'pp_propname', 'pp_value' ),
 188                         array( 'pp_page' => $id ),
 189                         __METHOD__
 190                 );
 191
 192                 $pageProperties = array();
 193                 foreach ( $result as $row ) {
 194                         $pageProperties[$row->pp_propname] = $row->pp_value;
 195                 }
 196
 197                 // Basic information
 198                 $pageInfo = array();
 199                 $pageInfo['header-basic'] = array();
 200
 201                 // Display title
 202                 $displayTitle = $title->getPrefixedText();
 203                 if ( !empty( $pageProperties['displaytitle'] ) ) {
 204                         $displayTitle = $pageProperties['displaytitle'];
 205                 }
 206
 207                 $pageInfo['header-basic'][] = array(
 208                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 209                 );
 210
 211                 // Is it a redirect? If so, where to?
 212                 if ( $title->isRedirect() ) {
 213                         $pageInfo['header-basic'][] = array(
 214                                 $this->msg( 'pageinfo-redirectsto' ),
 215                                 Linker::link( $this->page->getRedirectTarget() ) .
 216                                 $this->msg( 'word-separator' )->text() .
 217                                 $this->msg( 'parentheses', Linker::link(
 218                                         $this->page->getRedirectTarget(),
 219                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 220                                         array(),
 221                                         array( 'action' => 'info' )
 222                                 ) )->text()
 223                         );
 224                 }
 225
 226                 // Default sort key
 227                 $sortKey = $title->getCategorySortKey();
 228                 if ( !empty( $pageProperties['defaultsort'] ) ) {
 229                         $sortKey = $pageProperties['defaultsort'];
 230                 }
 231
 232                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 233
 234                 // Page length (in bytes)
 235                 $pageInfo['header-basic'][] = array(
 236                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 237                 );
 238
 239                 // Page ID (number not localised, as it's a database ID)
 240                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 241
 242                 // Language in which the page content is (supposed to be) written
 243                 $pageLang = $title->getPageLanguage()->getCode();
 244                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-language' ),
 245                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 246                         . ' ' . $this->msg( 'parentheses', $pageLang ) );
 247
 248                 // Search engine status
 249                 $pOutput = new ParserOutput();
 250                 if ( isset( $pageProperties['noindex'] ) ) {
 251                         $pOutput->setIndexPolicy( 'noindex' );
 252                 }
 253
 254                 // Use robot policy logic
 255                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 256                 $pageInfo['header-basic'][] = array(
 257                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 258                 );
 259
 260                 if ( isset( $pageCounts['views'] ) ) {
 261                         // Number of views
 262                         $pageInfo['header-basic'][] = array(
 263                                 $this->msg( 'pageinfo-views' ), $lang->formatNum( $pageCounts['views'] )
 264                         );
 265                 }
 266
 267                 if (
 268                         $user->isAllowed( 'unwatchedpages' ) ||
 269                         ( $wgUnwatchedPageThreshold !== false &&
 270                           $pageCounts['watchers'] >= $wgUnwatchedPageThreshold )
 271                 ) {
 272                         // Number of page watchers
 273                         $pageInfo['header-basic'][] = array(
 274                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 275                         );
 276                 } elseif ( $wgUnwatchedPageThreshold !== false ) {
 277                         $pageInfo['header-basic'][] = array(
 278                                 $this->msg( 'pageinfo-watchers' ),
 279                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $wgUnwatchedPageThreshold )
 280                         );
 281                 }
 282
 283                 // Redirects to this page
 284                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 285                 $pageInfo['header-basic'][] = array(
 286                         Linker::link(
 287                                 $whatLinksHere,
 288                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 289                                 array(),
 290                                 array( 'hidelinks' => 1, 'hidetrans' => 1 )
 291                         ),
 292                         $this->msg( 'pageinfo-redirects-value' )
 293                                 ->numParams( count( $title->getRedirectsHere() ) )
 294                 );
 295
 296                 // Is it counted as a content page?
 297                 if ( $this->page->isCountable() ) {
 298                         $pageInfo['header-basic'][] = array(
 299                                 $this->msg( 'pageinfo-contentpage' ),
 300                                 $this->msg( 'pageinfo-contentpage-yes' )
 301                         );
 302                 }
 303
 304                 // Subpages of this page, if subpages are enabled for the current NS
 305                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 306                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 307                         $pageInfo['header-basic'][] = array(
 308                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 309                                 $this->msg( 'pageinfo-subpages-value' )
 310                                         ->numParams(
 311                                                 $pageCounts['subpages']['total'],
 312                                                 $pageCounts['subpages']['redirects'],
 313                                                 $pageCounts['subpages']['nonredirects'] )
 314                         );
 315                 }
 316
 317                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 318                         $category = Category::newFromTitle( $title );
 319                         $pageInfo['category-info'] = array(
 320                                 array(
 321                                         $this->msg( 'pageinfo-category-pages' ),
 322                                         $lang->formatNum( $category->getPageCount() )
 323                                 ),
 324                                 array(
 325                                         $this->msg( 'pageinfo-category-subcats' ),
 326                                         $lang->formatNum( $category->getSubcatCount() )
 327                                 ),
 328                                 array(
 329                                         $this->msg( 'pageinfo-category-files' ),
 330                                         $lang->formatNum( $category->getFileCount() )
 331                                 )
 332                         );
 333                 }
 334
 335                 // Page protection
 336                 $pageInfo['header-restrictions'] = array();
 337
 338                 // Is this page effected by the cascading protection of something which includes it?
 339                 if ( $title->isCascadeProtected() ) {
 340                         $cascadingFrom = '';
 341                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 342
 343                         foreach ( $sources[0] as $sourceTitle ) {
 344                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 345                         }
 346
 347                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 348                         $pageInfo['header-restrictions'][] = array(
 349                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 350                                 $cascadingFrom
 351                         );
 352                 }
 353
 354                 // Is out protection set to cascade to other pages?
 355                 if ( $title->areRestrictionsCascading() ) {
 356                         $pageInfo['header-restrictions'][] = array(
 357                                 $this->msg( 'pageinfo-protect-cascading' ),
 358                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 359                         );
 360                 }
 361
 362                 // Page protection
 363                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 364                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 365
 366                         if ( $protectionLevel == '' ) {
 367                                 // Allow all users
 368                                 $message = $this->msg( 'protect-default' )->escaped();
 369                         } else {
 370                                 // Administrators only
 371                                 $message = $this->msg( "protect-level-$protectionLevel" );
 372                                 if ( $message->isDisabled() ) {
 373                                         // Require "$1" permission
 374                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 375                                 } else {
 376                                         $message = $message->escaped();
 377                                 }
 378                         }
 379
 380                         $pageInfo['header-restrictions'][] = array(
 381                                 $this->msg( "restriction-$restrictionType" ), $message
 382                         );
 383                 }
 384
 385                 if ( !$this->page->exists() ) {
 386                         return $pageInfo;
 387                 }
 388
 389                 // Edit history
 390                 $pageInfo['header-edits'] = array();
 391
 392                 $firstRev = $this->page->getOldestRevision();
 393                 $lastRev = $this->page->getRevision();
 394                 $batch = new LinkBatch;
 395
 396                 $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 397                 if ( $firstRevUser !== '' ) {
 398                         $batch->add( NS_USER, $firstRevUser );
 399                         $batch->add( NS_USER_TALK, $firstRevUser );
 400                 }
 401
 402                 $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 403                 if ( $lastRevUser !== '' ) {
 404                         $batch->add( NS_USER, $lastRevUser );
 405                         $batch->add( NS_USER_TALK, $lastRevUser );
 406                 }
 407
 408                 $batch->execute();
 409
 410                 // Page creator
 411                 $pageInfo['header-edits'][] = array(
 412                         $this->msg( 'pageinfo-firstuser' ),
 413                         Linker::revUserTools( $firstRev )
 414                 );
 415
 416                 // Date of page creation
 417                 $pageInfo['header-edits'][] = array(
 418                         $this->msg( 'pageinfo-firsttime' ),
 419                         Linker::linkKnown(
 420                                 $title,
 421                                 $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 422                                 array(),
 423                                 array( 'oldid' => $firstRev->getId() )
 424                         )
 425                 );
 426
 427                 // Latest editor
 428                 $pageInfo['header-edits'][] = array(
 429                         $this->msg( 'pageinfo-lastuser' ),
 430                         Linker::revUserTools( $lastRev )
 431                 );
 432
 433                 // Date of latest edit
 434                 $pageInfo['header-edits'][] = array(
 435                         $this->msg( 'pageinfo-lasttime' ),
 436                         Linker::linkKnown(
 437                                 $title,
 438                                 $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 439                                 array(),
 440                                 array( 'oldid' => $this->page->getLatest() )
 441                         )
 442                 );
 443
 444                 // Total number of edits
 445                 $pageInfo['header-edits'][] = array(
 446                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 447                 );
 448
 449                 // Total number of distinct authors
 450                 $pageInfo['header-edits'][] = array(
 451                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 452                 );
 453
 454                 // Recent number of edits (within past 30 days)
 455                 $pageInfo['header-edits'][] = array(
 456                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $wgRCMaxAge ) ),
 457                         $lang->formatNum( $pageCounts['recent_edits'] )
 458                 );
 459
 460                 // Recent number of distinct authors
 461                 $pageInfo['header-edits'][] = array(
 462                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 463                 );
 464
 465                 // Array of MagicWord objects
 466                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 467
 468                 // Array of magic word IDs
 469                 $wordIDs = $magicWords->names;
 470
 471                 // Array of IDs => localized magic words
 472                 $localizedWords = $wgContLang->getMagicWords();
 473
 474                 $listItems = array();
 475                 foreach ( $pageProperties as $property => $value ) {
 476                         if ( in_array( $property, $wordIDs ) ) {
 477                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 478                         }
 479                 }
 480
 481                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 482                 $hiddenCategories = $this->page->getHiddenCategories();
 483
 484                 if (
 485                         count( $listItems ) > 0 ||
 486                         count( $hiddenCategories ) > 0 ||
 487                         $pageCounts['transclusion']['from'] > 0 ||
 488                         $pageCounts['transclusion']['to'] > 0
 489                 ) {
 490                         $options = array( 'LIMIT' => $wgPageInfoTransclusionLimit );
 491                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 492                         $transcludedTargets = $title->getTemplateLinksTo( $options );
 493
 494                         // Page properties
 495                         $pageInfo['header-properties'] = array();
 496
 497                         // Magic words
 498                         if ( count( $listItems ) > 0 ) {
 499                                 $pageInfo['header-properties'][] = array(
 500                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 501                                         $localizedList
 502                                 );
 503                         }
 504
 505                         // Hidden categories
 506                         if ( count( $hiddenCategories ) > 0 ) {
 507                                 $pageInfo['header-properties'][] = array(
 508                                         $this->msg( 'pageinfo-hidden-categories' )
 509                                                 ->numParams( count( $hiddenCategories ) ),
 510                                         Linker::formatHiddenCategories( $hiddenCategories )
 511                                 );
 512                         }
 513
 514                         // Transcluded templates
 515                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 516                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 517                                         $more = $this->msg( 'morenotlisted' )->escaped();
 518                                 } else {
 519                                         $more = null;
 520                                 }
 521
 522                                 $pageInfo['header-properties'][] = array(
 523                                         $this->msg( 'pageinfo-templates' )
 524                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 525                                         Linker::formatTemplates(
 526                                                 $transcludedTemplates,
 527                                                 false,
 528                                                 false,
 529                                                 $more )
 530                                 );
 531                         }
 532
 533                         if ( $pageCounts['transclusion']['to'] > 0 ) {
 534                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 535                                         $more = Linker::link(
 536                                                 $whatLinksHere,
 537                                                 $this->msg( 'moredotdotdot' )->escaped(),
 538                                                 array(),
 539                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 540                                         );
 541                                 } else {
 542                                         $more = null;
 543                                 }
 544
 545                                 $pageInfo['header-properties'][] = array(
 546                                         $this->msg( 'pageinfo-transclusions' )
 547                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 548                                         Linker::formatTemplates(
 549                                                 $transcludedTargets,
 550                                                 false,
 551                                                 false,
 552                                                 $more )
 553                                 );
 554                         }
 555                 }
 556
 557                 return $pageInfo;
 558         }
 559
 560         /**
 561          * Returns page counts that would be too "expensive" to retrieve by normal means.
 562          *
 563          * @param Title $title Title to get counts for
 564          * @return array
 565          */
 566         protected static function pageCounts( Title $title ) {
 567                 global $wgRCMaxAge, $wgDisableCounters;
 568
 569                 wfProfileIn( __METHOD__ );
 570                 $id = $title->getArticleID();
 571
 572                 $dbr = wfGetDB( DB_SLAVE );
 573                 $result = array();
 574
 575                 if ( !$wgDisableCounters ) {
 576                         // Number of views
 577                         $views = (int) $dbr->selectField(
 578                                 'page',
 579                                 'page_counter',
 580                                 array( 'page_id' => $id ),
 581                                 __METHOD__
 582                         );
 583                         $result['views'] = $views;
 584                 }
 585
 586                 // Number of page watchers
 587                 $watchers = (int) $dbr->selectField(
 588                         'watchlist',
 589                         'COUNT(*)',
 590                         array(
 591                                 'wl_namespace' => $title->getNamespace(),
 592                                 'wl_title'     => $title->getDBkey(),
 593                         ),
 594                         __METHOD__
 595                 );
 596                 $result['watchers'] = $watchers;
 597
 598                 // Total number of edits
 599                 $edits = (int) $dbr->selectField(
 600                         'revision',
 601                         'COUNT(rev_page)',
 602                         array( 'rev_page' => $id ),
 603                         __METHOD__
 604                 );
 605                 $result['edits'] = $edits;
 606
 607                 // Total number of distinct authors
 608                 $authors = (int) $dbr->selectField(
 609                         'revision',
 610                         'COUNT(DISTINCT rev_user_text)',
 611                         array( 'rev_page' => $id ),
 612                         __METHOD__
 613                 );
 614                 $result['authors'] = $authors;
 615
 616                 // "Recent" threshold defined by $wgRCMaxAge
 617                 $threshold = $dbr->timestamp( time() - $wgRCMaxAge );
 618
 619                 // Recent number of edits
 620                 $edits = (int) $dbr->selectField(
 621                         'revision',
 622                         'COUNT(rev_page)',
 623                         array(
 624                                 'rev_page' => $id,
 625                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 626                         ),
 627                         __METHOD__
 628                 );
 629                 $result['recent_edits'] = $edits;
 630
 631                 // Recent number of distinct authors
 632                 $authors = (int) $dbr->selectField(
 633                         'revision',
 634                         'COUNT(DISTINCT rev_user_text)',
 635                         array(
 636                                 'rev_page' => $id,
 637                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 638                         ),
 639                         __METHOD__
 640                 );
 641                 $result['recent_authors'] = $authors;
 642
 643                 // Subpages (if enabled)
 644                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 645                         $conds = array( 'page_namespace' => $title->getNamespace() );
 646                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 647
 648                         // Subpages of this page (redirects)
 649                         $conds['page_is_redirect'] = 1;
 650                         $result['subpages']['redirects'] = (int) $dbr->selectField(
 651                                 'page',
 652                                 'COUNT(page_id)',
 653                                 $conds,
 654                                 __METHOD__ );
 655
 656                         // Subpages of this page (non-redirects)
 657                         $conds['page_is_redirect'] = 0;
 658                         $result['subpages']['nonredirects'] = (int) $dbr->selectField(
 659                                 'page',
 660                                 'COUNT(page_id)',
 661                                 $conds,
 662                                 __METHOD__
 663                         );
 664
 665                         // Subpages of this page (total)
 666                         $result['subpages']['total'] = $result['subpages']['redirects']
 667                                 + $result['subpages']['nonredirects'];
 668                 }
 669
 670                 // Counts for the number of transclusion links (to/from)
 671                 $result['transclusion']['to'] = (int) $dbr->selectField(
 672                         'templatelinks',
 673                         'COUNT(tl_from)',
 674                         array(
 675                                 'tl_namespace' => $title->getNamespace(),
 676                                 'tl_title' => $title->getDBkey()
 677                         ),
 678                         __METHOD__
 679                 );
 680
 681                 $result['transclusion']['from'] = (int) $dbr->selectField(
 682                         'templatelinks',
 683                         'COUNT(*)',
 684                         array( 'tl_from' => $title->getArticleID() ),
 685                         __METHOD__
 686                 );
 687
 688                 wfProfileOut( __METHOD__ );
 689                 return $result;
 690         }
 691
 692         /**
 693          * Returns the name that goes in the "<h1>" page title.
 694          *
 695          * @return string
 696          */
 697         protected function getPageTitle() {
 698                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 699         }
 700
 701         /**
 702          * Get a list of contributors of $article
 703          * @return string: html
 704          */
 705         protected function getContributors() {
 706                 global $wgHiddenPrefs;
 707
 708                 $contributors = $this->page->getContributors();
 709                 $real_names = array();
 710                 $user_names = array();
 711                 $anon_ips = array();
 712
 713                 # Sift for real versus user names
 714                 foreach ( $contributors as $user ) {
 715                         $page = $user->isAnon()
 716                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 717                                 : $user->getUserPage();
 718
 719                         if ( $user->getID() == 0 ) {
 720                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 721                         } elseif ( !in_array( 'realname', $wgHiddenPrefs ) && $user->getRealName() ) {
 722                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 723                         } else {
 724                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 725                         }
 726                 }
 727
 728                 $lang = $this->getLanguage();
 729
 730                 $real = $lang->listToText( $real_names );
 731
 732                 # "ThisSite user(s) A, B and C"
 733                 if ( count( $user_names ) ) {
 734                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 735                                 count( $user_names ) )->escaped();
 736                 } else {
 737                         $user = false;
 738                 }
 739
 740                 if ( count( $anon_ips ) ) {
 741                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 742                                 count( $anon_ips ) )->escaped();
 743                 } else {
 744                         $anon = false;
 745                 }
 746
 747                 # This is the big list, all mooshed together. We sift for blank strings
 748                 $fulllist = array();
 749                 foreach ( array( $real, $user, $anon ) as $s ) {
 750                         if ( $s !== '' ) {
 751                                 array_push( $fulllist, $s );
 752                         }
 753                 }
 754
 755                 $count = count( $fulllist );
 756                 # "Based on work by ..."
 757                 return $count
 758                         ? $this->msg( 'othercontribs' )->rawParams(
 759                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 760                         : '';
 761         }
 762
 763         /**
 764          * Returns the description that goes below the "<h1>" tag.
 765          *
 766          * @return string
 767          */
 768         protected function getDescription() {
 769                 return '';
 770         }
 771 }