includes/actions/InfoAction.php

   1 <?php
   2 /**
   3  * Displays information about a page.
   4  *
   5  * Copyright © 2011 Alexandre Emsenhuber
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  * @file
  22  * @ingroup Actions
  23  */
  24
  25 /**
  26  * Displays information about a page.
  27  *
  28  * @ingroup Actions
  29  */
  30 class InfoAction extends FormlessAction {
  31         /**
  32          * Returns the name of the action this object responds to.
  33          *
  34          * @return string lowercase
  35          */
  36         public function getName() {
  37                 return 'info';
  38         }
  39
  40         /**
  41          * Whether this action can still be executed by a blocked user.
  42          *
  43          * @return bool
  44          */
  45         public function requiresUnblock() {
  46                 return false;
  47         }
  48
  49         /**
  50          * Whether this action requires the wiki not to be locked.
  51          *
  52          * @return bool
  53          */
  54         public function requiresWrite() {
  55                 return false;
  56         }
  57
  58         /**
  59          * Clear the info cache for a given Title.
  60          *
  61          * @since 1.22
  62          * @param Title $title Title to clear cache for
  63          */
  64         public static function invalidateCache( Title $title ) {
  65                 global $wgMemc;
  66                 // Clear page info.
  67                 $revision = WikiPage::factory( $title )->getRevision();
  68                 if ( $revision !== null ) {
  69                         $key = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $revision->getId() );
  70                         $wgMemc->delete( $key );
  71                 }
  72         }
  73
  74         /**
  75          * Shows page information on GET request.
  76          *
  77          * @return string Page information that will be added to the output
  78          */
  79         public function onView() {
  80                 $content = '';
  81
  82                 // Validate revision
  83                 $oldid = $this->page->getOldID();
  84                 if ( $oldid ) {
  85                         $revision = $this->page->getRevisionFetched();
  86
  87                         // Revision is missing
  88                         if ( $revision === null ) {
  89                                 return $this->msg( 'missing-revision', $oldid )->parse();
  90                         }
  91
  92                         // Revision is not current
  93                         if ( !$revision->isCurrent() ) {
  94                                 return $this->msg( 'pageinfo-not-current' )->plain();
  95                         }
  96                 }
  97
  98                 // Page header
  99                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 100                         $content .= $this->msg( 'pageinfo-header' )->parse();
 101                 }
 102
 103                 // Hide "This page is a member of # hidden categories" explanation
 104                 $content .= Html::element( 'style', array(),
 105                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 106
 107                 // Hide "Templates used on this page" explanation
 108                 $content .= Html::element( 'style', array(),
 109                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 110
 111                 // Get page information
 112                 $pageInfo = $this->pageInfo();
 113
 114                 // Allow extensions to add additional information
 115                 wfRunHooks( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
 116
 117                 // Render page information
 118                 foreach ( $pageInfo as $header => $infoTable ) {
 119                         // Messages:
 120                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 121                         // pageinfo-header-properties, pageinfo-category-info
 122                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 123                         $table = "\n";
 124                         foreach ( $infoTable as $infoRow ) {
 125                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 126                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 127                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 128                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 129                         }
 130                         $content = $this->addTable( $content, $table ) . "\n";
 131                 }
 132
 133                 // Page footer
 134                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 135                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 136                 }
 137
 138                 // Page credits
 139                 /*if ( $this->page->exists() ) {
 140                         $content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
 141                 }*/
 142
 143                 return $content;
 144         }
 145
 146         /**
 147          * Creates a header that can be added to the output.
 148          *
 149          * @param string $header The header text.
 150          * @return string The HTML.
 151          */
 152         protected function makeHeader( $header ) {
 153                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 154                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 155         }
 156
 157         /**
 158          * Adds a row to a table that will be added to the content.
 159          *
 160          * @param string $table The table that will be added to the content
 161          * @param string $name The name of the row
 162          * @param string $value The value of the row
 163          * @param string $id The ID to use for the 'tr' element
 164          * @return string The table with the row added
 165          */
 166         protected function addRow( $table, $name, $value, $id ) {
 167                 return $table . Html::rawElement( 'tr', $id === null ? array() : array( 'id' => 'mw-' . $id ),
 168                         Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
 169                         Html::rawElement( 'td', array(), $value )
 170                 );
 171         }
 172
 173         /**
 174          * Adds a table to the content that will be added to the output.
 175          *
 176          * @param string $content The content that will be added to the output
 177          * @param string $table The table
 178          * @return string The content with the table added
 179          */
 180         protected function addTable( $content, $table ) {
 181                 return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
 182                         $table );
 183         }
 184
 185         /**
 186          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 187          * may add additional information in arbitrary positions. Array values are arrays with one
 188          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 189          *
 190          * @return array
 191          */
 192         protected function pageInfo() {
 193                 global $wgContLang, $wgRCMaxAge, $wgMemc,
 194                         $wgUnwatchedPageThreshold, $wgPageInfoTransclusionLimit;
 195
 196                 $user = $this->getUser();
 197                 $lang = $this->getLanguage();
 198                 $title = $this->getTitle();
 199                 $id = $title->getArticleID();
 200
 201                 $memcKey = wfMemcKey( 'infoaction',
 202                         sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 203                 $pageCounts = $wgMemc->get( $memcKey );
 204                 if ( $pageCounts === false ) {
 205                         // Get page information that would be too "expensive" to retrieve by normal means
 206                         $pageCounts = self::pageCounts( $title );
 207
 208                         $wgMemc->set( $memcKey, $pageCounts );
 209                 }
 210
 211                 // Get page properties
 212                 $dbr = wfGetDB( DB_SLAVE );
 213                 $result = $dbr->select(
 214                         'page_props',
 215                         array( 'pp_propname', 'pp_value' ),
 216                         array( 'pp_page' => $id ),
 217                         __METHOD__
 218                 );
 219
 220                 $pageProperties = array();
 221                 foreach ( $result as $row ) {
 222                         $pageProperties[$row->pp_propname] = $row->pp_value;
 223                 }
 224
 225                 // Basic information
 226                 $pageInfo = array();
 227                 $pageInfo['header-basic'] = array();
 228
 229                 // Display title
 230                 $displayTitle = $title->getPrefixedText();
 231                 if ( !empty( $pageProperties['displaytitle'] ) ) {
 232                         $displayTitle = $pageProperties['displaytitle'];
 233                 }
 234
 235                 $pageInfo['header-basic'][] = array(
 236                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 237                 );
 238
 239                 // Is it a redirect? If so, where to?
 240                 if ( $title->isRedirect() ) {
 241                         $pageInfo['header-basic'][] = array(
 242                                 $this->msg( 'pageinfo-redirectsto' ),
 243                                 Linker::link( $this->page->getRedirectTarget() ) .
 244                                 $this->msg( 'word-separator' )->text() .
 245                                 $this->msg( 'parentheses', Linker::link(
 246                                         $this->page->getRedirectTarget(),
 247                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 248                                         array(),
 249                                         array( 'action' => 'info' )
 250                                 ) )->text()
 251                         );
 252                 }
 253
 254                 // Default sort key
 255                 $sortKey = $title->getCategorySortkey();
 256                 if ( !empty( $pageProperties['defaultsort'] ) ) {
 257                         $sortKey = $pageProperties['defaultsort'];
 258                 }
 259
 260                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 261
 262                 // Page length (in bytes)
 263                 $pageInfo['header-basic'][] = array(
 264                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 265                 );
 266
 267                 // Page ID (number not localised, as it's a database ID)
 268                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 269
 270                 // Language in which the page content is (supposed to be) written
 271                 $pageLang = $title->getPageLanguage()->getCode();
 272                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-language' ),
 273                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 274                         . ' ' . $this->msg( 'parentheses', $pageLang ) );
 275
 276                 // Search engine status
 277                 $pOutput = new ParserOutput();
 278                 if ( isset( $pageProperties['noindex'] ) ) {
 279                         $pOutput->setIndexPolicy( 'noindex' );
 280                 }
 281
 282                 // Use robot policy logic
 283                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 284                 $pageInfo['header-basic'][] = array(
 285                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 286                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 287                 );
 288
 289                 if ( isset( $pageCounts['views'] ) ) {
 290                         // Number of views
 291                         $pageInfo['header-basic'][] = array(
 292                                 $this->msg( 'pageinfo-views' ), $lang->formatNum( $pageCounts['views'] )
 293                         );
 294                 }
 295
 296                 if (
 297                         $user->isAllowed( 'unwatchedpages' ) ||
 298                         ( $wgUnwatchedPageThreshold !== false &&
 299                           $pageCounts['watchers'] >= $wgUnwatchedPageThreshold )
 300                 ) {
 301                         // Number of page watchers
 302                         $pageInfo['header-basic'][] = array(
 303                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 304                         );
 305                 } elseif ( $wgUnwatchedPageThreshold !== false ) {
 306                         $pageInfo['header-basic'][] = array(
 307                                 $this->msg( 'pageinfo-watchers' ),
 308                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $wgUnwatchedPageThreshold )
 309                         );
 310                 }
 311
 312                 // Redirects to this page
 313                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 314                 $pageInfo['header-basic'][] = array(
 315                         Linker::link(
 316                                 $whatLinksHere,
 317                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 318                                 array(),
 319                                 array( 'hidelinks' => 1, 'hidetrans' => 1 )
 320                         ),
 321                         $this->msg( 'pageinfo-redirects-value' )
 322                                 ->numParams( count( $title->getRedirectsHere() ) )
 323                 );
 324
 325                 // Is it counted as a content page?
 326                 if ( $this->page->isCountable() ) {
 327                         $pageInfo['header-basic'][] = array(
 328                                 $this->msg( 'pageinfo-contentpage' ),
 329                                 $this->msg( 'pageinfo-contentpage-yes' )
 330                         );
 331                 }
 332
 333                 // Subpages of this page, if subpages are enabled for the current NS
 334                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 335                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 336                         $pageInfo['header-basic'][] = array(
 337                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 338                                 $this->msg( 'pageinfo-subpages-value' )
 339                                         ->numParams(
 340                                                 $pageCounts['subpages']['total'],
 341                                                 $pageCounts['subpages']['redirects'],
 342                                                 $pageCounts['subpages']['nonredirects'] )
 343                         );
 344                 }
 345
 346                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 347                         $category = Category::newFromTitle( $title );
 348                         $pageInfo['category-info'] = array(
 349                                 array(
 350                                         $this->msg( 'pageinfo-category-pages' ),
 351                                         $lang->formatNum( $category->getPageCount() )
 352                                 ),
 353                                 array(
 354                                         $this->msg( 'pageinfo-category-subcats' ),
 355                                         $lang->formatNum( $category->getSubcatCount() )
 356                                 ),
 357                                 array(
 358                                         $this->msg( 'pageinfo-category-files' ),
 359                                         $lang->formatNum( $category->getFileCount() )
 360                                 )
 361                         );
 362                 }
 363
 364                 // Page protection
 365                 $pageInfo['header-restrictions'] = array();
 366
 367                 // Is this page effected by the cascading protection of something which includes it?
 368                 if ( $title->isCascadeProtected() ) {
 369                         $cascadingFrom = '';
 370                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 371
 372                         foreach ( $sources[0] as $sourceTitle ) {
 373                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 374                         }
 375
 376                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 377                         $pageInfo['header-restrictions'][] = array(
 378                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 379                                 $cascadingFrom
 380                         );
 381                 }
 382
 383                 // Is out protection set to cascade to other pages?
 384                 if ( $title->areRestrictionsCascading() ) {
 385                         $pageInfo['header-restrictions'][] = array(
 386                                 $this->msg( 'pageinfo-protect-cascading' ),
 387                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 388                         );
 389                 }
 390
 391                 // Page protection
 392                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 393                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 394
 395                         if ( $protectionLevel == '' ) {
 396                                 // Allow all users
 397                                 $message = $this->msg( 'protect-default' )->escaped();
 398                         } else {
 399                                 // Administrators only
 400                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 401                                 $message = $this->msg( "protect-level-$protectionLevel" );
 402                                 if ( $message->isDisabled() ) {
 403                                         // Require "$1" permission
 404                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 405                                 } else {
 406                                         $message = $message->escaped();
 407                                 }
 408                         }
 409
 410                         // Messages: restriction-edit, restriction-move, restriction-create,
 411                         // restriction-upload
 412                         $pageInfo['header-restrictions'][] = array(
 413                                 $this->msg( "restriction-$restrictionType" ), $message
 414                         );
 415                 }
 416
 417                 if ( !$this->page->exists() ) {
 418                         return $pageInfo;
 419                 }
 420
 421                 // Edit history
 422                 $pageInfo['header-edits'] = array();
 423
 424                 $firstRev = $this->page->getOldestRevision();
 425                 $lastRev = $this->page->getRevision();
 426                 $batch = new LinkBatch;
 427
 428                 if ( $firstRev ) {
 429                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 430                         if ( $firstRevUser !== '' ) {
 431                                 $batch->add( NS_USER, $firstRevUser );
 432                                 $batch->add( NS_USER_TALK, $firstRevUser );
 433                         }
 434                 }
 435
 436                 if ( $lastRev ) {
 437                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 438                         if ( $lastRevUser !== '' ) {
 439                                 $batch->add( NS_USER, $lastRevUser );
 440                                 $batch->add( NS_USER_TALK, $lastRevUser );
 441                         }
 442                 }
 443
 444                 $batch->execute();
 445
 446                 if ( $firstRev ) {
 447                         // Page creator
 448                         $pageInfo['header-edits'][] = array(
 449                                 $this->msg( 'pageinfo-firstuser' ),
 450                                 Linker::revUserTools( $firstRev )
 451                         );
 452
 453                         // Date of page creation
 454                         $pageInfo['header-edits'][] = array(
 455                                 $this->msg( 'pageinfo-firsttime' ),
 456                                 Linker::linkKnown(
 457                                         $title,
 458                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 459                                         array(),
 460                                         array( 'oldid' => $firstRev->getId() )
 461                                 )
 462                         );
 463                 }
 464
 465                 if ( $lastRev ) {
 466                         // Latest editor
 467                         $pageInfo['header-edits'][] = array(
 468                                 $this->msg( 'pageinfo-lastuser' ),
 469                                 Linker::revUserTools( $lastRev )
 470                         );
 471
 472                         // Date of latest edit
 473                         $pageInfo['header-edits'][] = array(
 474                                 $this->msg( 'pageinfo-lasttime' ),
 475                                 Linker::linkKnown(
 476                                         $title,
 477                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 478                                         array(),
 479                                         array( 'oldid' => $this->page->getLatest() )
 480                                 )
 481                         );
 482                 }
 483
 484                 // Total number of edits
 485                 $pageInfo['header-edits'][] = array(
 486                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 487                 );
 488
 489                 // Total number of distinct authors
 490                 $pageInfo['header-edits'][] = array(
 491                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 492                 );
 493
 494                 // Recent number of edits (within past 30 days)
 495                 $pageInfo['header-edits'][] = array(
 496                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $wgRCMaxAge ) ),
 497                         $lang->formatNum( $pageCounts['recent_edits'] )
 498                 );
 499
 500                 // Recent number of distinct authors
 501                 $pageInfo['header-edits'][] = array(
 502                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 503                 );
 504
 505                 // Array of MagicWord objects
 506                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 507
 508                 // Array of magic word IDs
 509                 $wordIDs = $magicWords->names;
 510
 511                 // Array of IDs => localized magic words
 512                 $localizedWords = $wgContLang->getMagicWords();
 513
 514                 $listItems = array();
 515                 foreach ( $pageProperties as $property => $value ) {
 516                         if ( in_array( $property, $wordIDs ) ) {
 517                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 518                         }
 519                 }
 520
 521                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 522                 $hiddenCategories = $this->page->getHiddenCategories();
 523
 524                 if (
 525                         count( $listItems ) > 0 ||
 526                         count( $hiddenCategories ) > 0 ||
 527                         $pageCounts['transclusion']['from'] > 0 ||
 528                         $pageCounts['transclusion']['to'] > 0
 529                 ) {
 530                         $options = array( 'LIMIT' => $wgPageInfoTransclusionLimit );
 531                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 532                         $transcludedTargets = $title->getTemplateLinksTo( $options );
 533
 534                         // Page properties
 535                         $pageInfo['header-properties'] = array();
 536
 537                         // Magic words
 538                         if ( count( $listItems ) > 0 ) {
 539                                 $pageInfo['header-properties'][] = array(
 540                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 541                                         $localizedList
 542                                 );
 543                         }
 544
 545                         // Hidden categories
 546                         if ( count( $hiddenCategories ) > 0 ) {
 547                                 $pageInfo['header-properties'][] = array(
 548                                         $this->msg( 'pageinfo-hidden-categories' )
 549                                                 ->numParams( count( $hiddenCategories ) ),
 550                                         Linker::formatHiddenCategories( $hiddenCategories )
 551                                 );
 552                         }
 553
 554                         // Transcluded templates
 555                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 556                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 557                                         $more = $this->msg( 'morenotlisted' )->escaped();
 558                                 } else {
 559                                         $more = null;
 560                                 }
 561
 562                                 $pageInfo['header-properties'][] = array(
 563                                         $this->msg( 'pageinfo-templates' )
 564                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 565                                         Linker::formatTemplates(
 566                                                 $transcludedTemplates,
 567                                                 false,
 568                                                 false,
 569                                                 $more )
 570                                 );
 571                         }
 572
 573                         if ( $pageCounts['transclusion']['to'] > 0 ) {
 574                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 575                                         $more = Linker::link(
 576                                                 $whatLinksHere,
 577                                                 $this->msg( 'moredotdotdot' )->escaped(),
 578                                                 array(),
 579                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 580                                         );
 581                                 } else {
 582                                         $more = null;
 583                                 }
 584
 585                                 $pageInfo['header-properties'][] = array(
 586                                         $this->msg( 'pageinfo-transclusions' )
 587                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 588                                         Linker::formatTemplates(
 589                                                 $transcludedTargets,
 590                                                 false,
 591                                                 false,
 592                                                 $more )
 593                                 );
 594                         }
 595                 }
 596
 597                 return $pageInfo;
 598         }
 599
 600         /**
 601          * Returns page counts that would be too "expensive" to retrieve by normal means.
 602          *
 603          * @param Title $title Title to get counts for
 604          * @return array
 605          */
 606         protected static function pageCounts( Title $title ) {
 607                 global $wgRCMaxAge, $wgDisableCounters;
 608
 609                 wfProfileIn( __METHOD__ );
 610                 $id = $title->getArticleID();
 611
 612                 $dbr = wfGetDB( DB_SLAVE );
 613                 $result = array();
 614
 615                 if ( !$wgDisableCounters ) {
 616                         // Number of views
 617                         $views = (int)$dbr->selectField(
 618                                 'page',
 619                                 'page_counter',
 620                                 array( 'page_id' => $id ),
 621                                 __METHOD__
 622                         );
 623                         $result['views'] = $views;
 624                 }
 625
 626                 // Number of page watchers
 627                 $watchers = (int)$dbr->selectField(
 628                         'watchlist',
 629                         'COUNT(*)',
 630                         array(
 631                                 'wl_namespace' => $title->getNamespace(),
 632                                 'wl_title' => $title->getDBkey(),
 633                         ),
 634                         __METHOD__
 635                 );
 636                 $result['watchers'] = $watchers;
 637
 638                 // Total number of edits
 639                 $edits = (int)$dbr->selectField(
 640                         'revision',
 641                         'COUNT(rev_page)',
 642                         array( 'rev_page' => $id ),
 643                         __METHOD__
 644                 );
 645                 $result['edits'] = $edits;
 646
 647                 // Total number of distinct authors
 648                 $authors = (int)$dbr->selectField(
 649                         'revision',
 650                         'COUNT(DISTINCT rev_user_text)',
 651                         array( 'rev_page' => $id ),
 652                         __METHOD__
 653                 );
 654                 $result['authors'] = $authors;
 655
 656                 // "Recent" threshold defined by $wgRCMaxAge
 657                 $threshold = $dbr->timestamp( time() - $wgRCMaxAge );
 658
 659                 // Recent number of edits
 660                 $edits = (int)$dbr->selectField(
 661                         'revision',
 662                         'COUNT(rev_page)',
 663                         array(
 664                                 'rev_page' => $id,
 665                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 666                         ),
 667                         __METHOD__
 668                 );
 669                 $result['recent_edits'] = $edits;
 670
 671                 // Recent number of distinct authors
 672                 $authors = (int)$dbr->selectField(
 673                         'revision',
 674                         'COUNT(DISTINCT rev_user_text)',
 675                         array(
 676                                 'rev_page' => $id,
 677                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 678                         ),
 679                         __METHOD__
 680                 );
 681                 $result['recent_authors'] = $authors;
 682
 683                 // Subpages (if enabled)
 684                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 685                         $conds = array( 'page_namespace' => $title->getNamespace() );
 686                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 687
 688                         // Subpages of this page (redirects)
 689                         $conds['page_is_redirect'] = 1;
 690                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 691                                 'page',
 692                                 'COUNT(page_id)',
 693                                 $conds,
 694                                 __METHOD__ );
 695
 696                         // Subpages of this page (non-redirects)
 697                         $conds['page_is_redirect'] = 0;
 698                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 699                                 'page',
 700                                 'COUNT(page_id)',
 701                                 $conds,
 702                                 __METHOD__
 703                         );
 704
 705                         // Subpages of this page (total)
 706                         $result['subpages']['total'] = $result['subpages']['redirects']
 707                                 + $result['subpages']['nonredirects'];
 708                 }
 709
 710                 // Counts for the number of transclusion links (to/from)
 711                 $result['transclusion']['to'] = (int)$dbr->selectField(
 712                         'templatelinks',
 713                         'COUNT(tl_from)',
 714                         array(
 715                                 'tl_namespace' => $title->getNamespace(),
 716                                 'tl_title' => $title->getDBkey()
 717                         ),
 718                         __METHOD__
 719                 );
 720
 721                 $result['transclusion']['from'] = (int)$dbr->selectField(
 722                         'templatelinks',
 723                         'COUNT(*)',
 724                         array( 'tl_from' => $title->getArticleID() ),
 725                         __METHOD__
 726                 );
 727
 728                 wfProfileOut( __METHOD__ );
 729                 return $result;
 730         }
 731
 732         /**
 733          * Returns the name that goes in the "<h1>" page title.
 734          *
 735          * @return string
 736          */
 737         protected function getPageTitle() {
 738                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 739         }
 740
 741         /**
 742          * Get a list of contributors of $article
 743          * @return string: html
 744          */
 745         protected function getContributors() {
 746                 global $wgHiddenPrefs;
 747
 748                 $contributors = $this->page->getContributors();
 749                 $real_names = array();
 750                 $user_names = array();
 751                 $anon_ips = array();
 752
 753                 # Sift for real versus user names
 754                 foreach ( $contributors as $user ) {
 755                         $page = $user->isAnon()
 756                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 757                                 : $user->getUserPage();
 758
 759                         if ( $user->getID() == 0 ) {
 760                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 761                         } elseif ( !in_array( 'realname', $wgHiddenPrefs ) && $user->getRealName() ) {
 762                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 763                         } else {
 764                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 765                         }
 766                 }
 767
 768                 $lang = $this->getLanguage();
 769
 770                 $real = $lang->listToText( $real_names );
 771
 772                 # "ThisSite user(s) A, B and C"
 773                 if ( count( $user_names ) ) {
 774                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 775                                 count( $user_names ) )->escaped();
 776                 } else {
 777                         $user = false;
 778                 }
 779
 780                 if ( count( $anon_ips ) ) {
 781                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 782                                 count( $anon_ips ) )->escaped();
 783                 } else {
 784                         $anon = false;
 785                 }
 786
 787                 # This is the big list, all mooshed together. We sift for blank strings
 788                 $fulllist = array();
 789                 foreach ( array( $real, $user, $anon ) as $s ) {
 790                         if ( $s !== '' ) {
 791                                 array_push( $fulllist, $s );
 792                         }
 793                 }
 794
 795                 $count = count( $fulllist );
 796                 # "Based on work by ..."
 797                 return $count
 798                         ? $this->msg( 'othercontribs' )->rawParams(
 799                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 800                         : '';
 801         }
 802
 803         /**
 804          * Returns the description that goes below the "<h1>" tag.
 805          *
 806          * @return string
 807          */
 808         protected function getDescription() {
 809                 return '';
 810         }
 811 }