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