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         const CACHE_VERSION = '2013-03-17';
  32
  33         /**
  34          * Returns the name of the action this object responds to.
  35          *
  36          * @return string lowercase
  37          */
  38         public function getName() {
  39                 return 'info';
  40         }
  41
  42         /**
  43          * Whether this action can still be executed by a blocked user.
  44          *
  45          * @return bool
  46          */
  47         public function requiresUnblock() {
  48                 return false;
  49         }
  50
  51         /**
  52          * Whether this action requires the wiki not to be locked.
  53          *
  54          * @return bool
  55          */
  56         public function requiresWrite() {
  57                 return false;
  58         }
  59
  60         /**
  61          * Clear the info cache for a given Title.
  62          *
  63          * @since 1.22
  64          * @param Title $title Title to clear cache for
  65          */
  66         public static function invalidateCache( Title $title ) {
  67                 global $wgMemc;
  68                 // Clear page info.
  69                 $revision = WikiPage::factory( $title )->getRevision();
  70                 if ( $revision !== null ) {
  71                         $key = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $revision->getId() );
  72                         $wgMemc->delete( $key );
  73                 }
  74         }
  75
  76         /**
  77          * Shows page information on GET request.
  78          *
  79          * @return string Page information that will be added to the output
  80          */
  81         public function onView() {
  82                 $content = '';
  83
  84                 // Validate revision
  85                 $oldid = $this->page->getOldID();
  86                 if ( $oldid ) {
  87                         $revision = $this->page->getRevisionFetched();
  88
  89                         // Revision is missing
  90                         if ( $revision === null ) {
  91                                 return $this->msg( 'missing-revision', $oldid )->parse();
  92                         }
  93
  94                         // Revision is not current
  95                         if ( !$revision->isCurrent() ) {
  96                                 return $this->msg( 'pageinfo-not-current' )->plain();
  97                         }
  98                 }
  99
 100                 // Page header
 101                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 102                         $content .= $this->msg( 'pageinfo-header' )->parse();
 103                 }
 104
 105                 // Hide "This page is a member of # hidden categories" explanation
 106                 $content .= Html::element( 'style', array(),
 107                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 108
 109                 // Hide "Templates used on this page" explanation
 110                 $content .= Html::element( 'style', array(),
 111                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 112
 113                 // Get page information
 114                 $pageInfo = $this->pageInfo();
 115
 116                 // Allow extensions to add additional information
 117                 wfRunHooks( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
 118
 119                 // Render page information
 120                 foreach ( $pageInfo as $header => $infoTable ) {
 121                         // Messages:
 122                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 123                         // pageinfo-header-properties, pageinfo-category-info
 124                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 125                         $table = "\n";
 126                         foreach ( $infoTable as $infoRow ) {
 127                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 128                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 129                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 130                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 131                         }
 132                         $content = $this->addTable( $content, $table ) . "\n";
 133                 }
 134
 135                 // Page footer
 136                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 137                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 138                 }
 139
 140                 // Page credits
 141                 /*if ( $this->page->exists() ) {
 142                         $content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
 143                 }*/
 144
 145                 return $content;
 146         }
 147
 148         /**
 149          * Creates a header that can be added to the output.
 150          *
 151          * @param string $header The header text.
 152          * @return string The HTML.
 153          */
 154         protected function makeHeader( $header ) {
 155                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 156
 157                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 158         }
 159
 160         /**
 161          * Adds a row to a table that will be added to the content.
 162          *
 163          * @param string $table The table that will be added to the content
 164          * @param string $name The name of the row
 165          * @param string $value The value of the row
 166          * @param string $id The ID to use for the 'tr' element
 167          * @return string The table with the row added
 168          */
 169         protected function addRow( $table, $name, $value, $id ) {
 170                 return $table . Html::rawElement( 'tr', $id === null ? array() : array( 'id' => 'mw-' . $id ),
 171                         Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
 172                         Html::rawElement( 'td', array(), $value )
 173                 );
 174         }
 175
 176         /**
 177          * Adds a table to the content that will be added to the output.
 178          *
 179          * @param string $content The content that will be added to the output
 180          * @param string $table The table
 181          * @return string The content with the table added
 182          */
 183         protected function addTable( $content, $table ) {
 184                 return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
 185                         $table );
 186         }
 187
 188         /**
 189          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 190          * may add additional information in arbitrary positions. Array values are arrays with one
 191          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 192          *
 193          * @return array
 194          */
 195         protected function pageInfo() {
 196                 global $wgContLang, $wgRCMaxAge, $wgMemc,
 197                         $wgUnwatchedPageThreshold, $wgPageInfoTransclusionLimit;
 198
 199                 $user = $this->getUser();
 200                 $lang = $this->getLanguage();
 201                 $title = $this->getTitle();
 202                 $id = $title->getArticleID();
 203
 204                 $memcKey = wfMemcKey( 'infoaction',
 205                         sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 206                 $pageCounts = $wgMemc->get( $memcKey );
 207                 $version = isset( $pageCounts['cacheversion'] ) ? $pageCounts['cacheversion'] : false;
 208                 if ( $pageCounts === false || $version !== self::CACHE_VERSION ) {
 209                         // Get page information that would be too "expensive" to retrieve by normal means
 210                         $pageCounts = self::pageCounts( $title );
 211                         $pageCounts['cacheversion'] = self::CACHE_VERSION;
 212
 213                         $wgMemc->set( $memcKey, $pageCounts );
 214                 }
 215
 216                 // Get page properties
 217                 $dbr = wfGetDB( DB_SLAVE );
 218                 $result = $dbr->select(
 219                         'page_props',
 220                         array( 'pp_propname', 'pp_value' ),
 221                         array( 'pp_page' => $id ),
 222                         __METHOD__
 223                 );
 224
 225                 $pageProperties = array();
 226                 foreach ( $result as $row ) {
 227                         $pageProperties[$row->pp_propname] = $row->pp_value;
 228                 }
 229
 230                 // Basic information
 231                 $pageInfo = array();
 232                 $pageInfo['header-basic'] = array();
 233
 234                 // Display title
 235                 $displayTitle = $title->getPrefixedText();
 236                 if ( !empty( $pageProperties['displaytitle'] ) ) {
 237                         $displayTitle = $pageProperties['displaytitle'];
 238                 }
 239
 240                 $pageInfo['header-basic'][] = array(
 241                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 242                 );
 243
 244                 // Is it a redirect? If so, where to?
 245                 if ( $title->isRedirect() ) {
 246                         $pageInfo['header-basic'][] = array(
 247                                 $this->msg( 'pageinfo-redirectsto' ),
 248                                 Linker::link( $this->page->getRedirectTarget() ) .
 249                                 $this->msg( 'word-separator' )->text() .
 250                                 $this->msg( 'parentheses', Linker::link(
 251                                         $this->page->getRedirectTarget(),
 252                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 253                                         array(),
 254                                         array( 'action' => 'info' )
 255                                 ) )->text()
 256                         );
 257                 }
 258
 259                 // Default sort key
 260                 $sortKey = $title->getCategorySortkey();
 261                 if ( !empty( $pageProperties['defaultsort'] ) ) {
 262                         $sortKey = $pageProperties['defaultsort'];
 263                 }
 264
 265                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 266
 267                 // Page length (in bytes)
 268                 $pageInfo['header-basic'][] = array(
 269                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 270                 );
 271
 272                 // Page ID (number not localised, as it's a database ID)
 273                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 274
 275                 // Language in which the page content is (supposed to be) written
 276                 $pageLang = $title->getPageLanguage()->getCode();
 277                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-language' ),
 278                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 279                         . ' ' . $this->msg( 'parentheses', $pageLang ) );
 280
 281                 // Content model of the page
 282                 $pageInfo['header-basic'][] = array(
 283                         $this->msg( 'pageinfo-content-model' ),
 284                         ContentHandler::getLocalizedName( $title->getContentModel() )
 285                 );
 286
 287                 // Search engine status
 288                 $pOutput = new ParserOutput();
 289                 if ( isset( $pageProperties['noindex'] ) ) {
 290                         $pOutput->setIndexPolicy( 'noindex' );
 291                 }
 292
 293                 // Use robot policy logic
 294                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 295                 $pageInfo['header-basic'][] = array(
 296                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 297                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 298                 );
 299
 300                 if ( isset( $pageCounts['views'] ) ) {
 301                         // Number of views
 302                         $pageInfo['header-basic'][] = array(
 303                                 $this->msg( 'pageinfo-views' ), $lang->formatNum( $pageCounts['views'] )
 304                         );
 305                 }
 306
 307                 if (
 308                         $user->isAllowed( 'unwatchedpages' ) ||
 309                         ( $wgUnwatchedPageThreshold !== false &&
 310                                 $pageCounts['watchers'] >= $wgUnwatchedPageThreshold )
 311                 ) {
 312                         // Number of page watchers
 313                         $pageInfo['header-basic'][] = array(
 314                                 $this->msg( 'pageinfo-watchers' ), $lang->formatNum( $pageCounts['watchers'] )
 315                         );
 316                 } elseif ( $wgUnwatchedPageThreshold !== false ) {
 317                         $pageInfo['header-basic'][] = array(
 318                                 $this->msg( 'pageinfo-watchers' ),
 319                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $wgUnwatchedPageThreshold )
 320                         );
 321                 }
 322
 323                 // Redirects to this page
 324                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 325                 $pageInfo['header-basic'][] = array(
 326                         Linker::link(
 327                                 $whatLinksHere,
 328                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 329                                 array(),
 330                                 array( 'hidelinks' => 1, 'hidetrans' => 1 )
 331                         ),
 332                         $this->msg( 'pageinfo-redirects-value' )
 333                                 ->numParams( count( $title->getRedirectsHere() ) )
 334                 );
 335
 336                 // Is it counted as a content page?
 337                 if ( $this->page->isCountable() ) {
 338                         $pageInfo['header-basic'][] = array(
 339                                 $this->msg( 'pageinfo-contentpage' ),
 340                                 $this->msg( 'pageinfo-contentpage-yes' )
 341                         );
 342                 }
 343
 344                 // Subpages of this page, if subpages are enabled for the current NS
 345                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 346                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 347                         $pageInfo['header-basic'][] = array(
 348                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 349                                 $this->msg( 'pageinfo-subpages-value' )
 350                                         ->numParams(
 351                                                 $pageCounts['subpages']['total'],
 352                                                 $pageCounts['subpages']['redirects'],
 353                                                 $pageCounts['subpages']['nonredirects'] )
 354                         );
 355                 }
 356
 357                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 358                         $category = Category::newFromTitle( $title );
 359                         $pageInfo['category-info'] = array(
 360                                 array(
 361                                         $this->msg( 'pageinfo-category-pages' ),
 362                                         $lang->formatNum( $category->getPageCount() )
 363                                 ),
 364                                 array(
 365                                         $this->msg( 'pageinfo-category-subcats' ),
 366                                         $lang->formatNum( $category->getSubcatCount() )
 367                                 ),
 368                                 array(
 369                                         $this->msg( 'pageinfo-category-files' ),
 370                                         $lang->formatNum( $category->getFileCount() )
 371                                 )
 372                         );
 373                 }
 374
 375                 // Page protection
 376                 $pageInfo['header-restrictions'] = array();
 377
 378                 // Is this page effected by the cascading protection of something which includes it?
 379                 if ( $title->isCascadeProtected() ) {
 380                         $cascadingFrom = '';
 381                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 382
 383                         foreach ( $sources[0] as $sourceTitle ) {
 384                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 385                         }
 386
 387                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 388                         $pageInfo['header-restrictions'][] = array(
 389                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 390                                 $cascadingFrom
 391                         );
 392                 }
 393
 394                 // Is out protection set to cascade to other pages?
 395                 if ( $title->areRestrictionsCascading() ) {
 396                         $pageInfo['header-restrictions'][] = array(
 397                                 $this->msg( 'pageinfo-protect-cascading' ),
 398                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 399                         );
 400                 }
 401
 402                 // Page protection
 403                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 404                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 405
 406                         if ( $protectionLevel == '' ) {
 407                                 // Allow all users
 408                                 $message = $this->msg( 'protect-default' )->escaped();
 409                         } else {
 410                                 // Administrators only
 411                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 412                                 $message = $this->msg( "protect-level-$protectionLevel" );
 413                                 if ( $message->isDisabled() ) {
 414                                         // Require "$1" permission
 415                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 416                                 } else {
 417                                         $message = $message->escaped();
 418                                 }
 419                         }
 420
 421                         // Messages: restriction-edit, restriction-move, restriction-create,
 422                         // restriction-upload
 423                         $pageInfo['header-restrictions'][] = array(
 424                                 $this->msg( "restriction-$restrictionType" ), $message
 425                         );
 426                 }
 427
 428                 if ( !$this->page->exists() ) {
 429                         return $pageInfo;
 430                 }
 431
 432                 // Edit history
 433                 $pageInfo['header-edits'] = array();
 434
 435                 $firstRev = $this->page->getOldestRevision();
 436                 $lastRev = $this->page->getRevision();
 437                 $batch = new LinkBatch;
 438
 439                 if ( $firstRev ) {
 440                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 441                         if ( $firstRevUser !== '' ) {
 442                                 $batch->add( NS_USER, $firstRevUser );
 443                                 $batch->add( NS_USER_TALK, $firstRevUser );
 444                         }
 445                 }
 446
 447                 if ( $lastRev ) {
 448                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 449                         if ( $lastRevUser !== '' ) {
 450                                 $batch->add( NS_USER, $lastRevUser );
 451                                 $batch->add( NS_USER_TALK, $lastRevUser );
 452                         }
 453                 }
 454
 455                 $batch->execute();
 456
 457                 if ( $firstRev ) {
 458                         // Page creator
 459                         $pageInfo['header-edits'][] = array(
 460                                 $this->msg( 'pageinfo-firstuser' ),
 461                                 Linker::revUserTools( $firstRev )
 462                         );
 463
 464                         // Date of page creation
 465                         $pageInfo['header-edits'][] = array(
 466                                 $this->msg( 'pageinfo-firsttime' ),
 467                                 Linker::linkKnown(
 468                                         $title,
 469                                         $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ),
 470                                         array(),
 471                                         array( 'oldid' => $firstRev->getId() )
 472                                 )
 473                         );
 474                 }
 475
 476                 if ( $lastRev ) {
 477                         // Latest editor
 478                         $pageInfo['header-edits'][] = array(
 479                                 $this->msg( 'pageinfo-lastuser' ),
 480                                 Linker::revUserTools( $lastRev )
 481                         );
 482
 483                         // Date of latest edit
 484                         $pageInfo['header-edits'][] = array(
 485                                 $this->msg( 'pageinfo-lasttime' ),
 486                                 Linker::linkKnown(
 487                                         $title,
 488                                         $lang->userTimeAndDate( $this->page->getTimestamp(), $user ),
 489                                         array(),
 490                                         array( 'oldid' => $this->page->getLatest() )
 491                                 )
 492                         );
 493                 }
 494
 495                 // Total number of edits
 496                 $pageInfo['header-edits'][] = array(
 497                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 498                 );
 499
 500                 // Total number of distinct authors
 501                 $pageInfo['header-edits'][] = array(
 502                         $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 503                 );
 504
 505                 // Recent number of edits (within past 30 days)
 506                 $pageInfo['header-edits'][] = array(
 507                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $wgRCMaxAge ) ),
 508                         $lang->formatNum( $pageCounts['recent_edits'] )
 509                 );
 510
 511                 // Recent number of distinct authors
 512                 $pageInfo['header-edits'][] = array(
 513                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 514                 );
 515
 516                 // Array of MagicWord objects
 517                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 518
 519                 // Array of magic word IDs
 520                 $wordIDs = $magicWords->names;
 521
 522                 // Array of IDs => localized magic words
 523                 $localizedWords = $wgContLang->getMagicWords();
 524
 525                 $listItems = array();
 526                 foreach ( $pageProperties as $property => $value ) {
 527                         if ( in_array( $property, $wordIDs ) ) {
 528                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 529                         }
 530                 }
 531
 532                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 533                 $hiddenCategories = $this->page->getHiddenCategories();
 534
 535                 if (
 536                         count( $listItems ) > 0 ||
 537                         count( $hiddenCategories ) > 0 ||
 538                         $pageCounts['transclusion']['from'] > 0 ||
 539                         $pageCounts['transclusion']['to'] > 0
 540                 ) {
 541                         $options = array( 'LIMIT' => $wgPageInfoTransclusionLimit );
 542                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 543                         $transcludedTargets = $title->getTemplateLinksTo( $options );
 544
 545                         // Page properties
 546                         $pageInfo['header-properties'] = array();
 547
 548                         // Magic words
 549                         if ( count( $listItems ) > 0 ) {
 550                                 $pageInfo['header-properties'][] = array(
 551                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 552                                         $localizedList
 553                                 );
 554                         }
 555
 556                         // Hidden categories
 557                         if ( count( $hiddenCategories ) > 0 ) {
 558                                 $pageInfo['header-properties'][] = array(
 559                                         $this->msg( 'pageinfo-hidden-categories' )
 560                                                 ->numParams( count( $hiddenCategories ) ),
 561                                         Linker::formatHiddenCategories( $hiddenCategories )
 562                                 );
 563                         }
 564
 565                         // Transcluded templates
 566                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 567                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 568                                         $more = $this->msg( 'morenotlisted' )->escaped();
 569                                 } else {
 570                                         $more = null;
 571                                 }
 572
 573                                 $pageInfo['header-properties'][] = array(
 574                                         $this->msg( 'pageinfo-templates' )
 575                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 576                                         Linker::formatTemplates(
 577                                                 $transcludedTemplates,
 578                                                 false,
 579                                                 false,
 580                                                 $more )
 581                                 );
 582                         }
 583
 584                         if ( $pageCounts['transclusion']['to'] > 0 ) {
 585                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 586                                         $more = Linker::link(
 587                                                 $whatLinksHere,
 588                                                 $this->msg( 'moredotdotdot' )->escaped(),
 589                                                 array(),
 590                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 591                                         );
 592                                 } else {
 593                                         $more = null;
 594                                 }
 595
 596                                 $pageInfo['header-properties'][] = array(
 597                                         $this->msg( 'pageinfo-transclusions' )
 598                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 599                                         Linker::formatTemplates(
 600                                                 $transcludedTargets,
 601                                                 false,
 602                                                 false,
 603                                                 $more )
 604                                 );
 605                         }
 606                 }
 607
 608                 return $pageInfo;
 609         }
 610
 611         /**
 612          * Returns page counts that would be too "expensive" to retrieve by normal means.
 613          *
 614          * @param Title $title Title to get counts for
 615          * @return array
 616          */
 617         protected static function pageCounts( Title $title ) {
 618                 global $wgRCMaxAge, $wgDisableCounters;
 619
 620                 wfProfileIn( __METHOD__ );
 621                 $id = $title->getArticleID();
 622
 623                 $dbr = wfGetDB( DB_SLAVE );
 624                 $result = array();
 625
 626                 if ( !$wgDisableCounters ) {
 627                         // Number of views
 628                         $views = (int)$dbr->selectField(
 629                                 'page',
 630                                 'page_counter',
 631                                 array( 'page_id' => $id ),
 632                                 __METHOD__
 633                         );
 634                         $result['views'] = $views;
 635                 }
 636
 637                 // Number of page watchers
 638                 $watchers = (int)$dbr->selectField(
 639                         'watchlist',
 640                         'COUNT(*)',
 641                         array(
 642                                 'wl_namespace' => $title->getNamespace(),
 643                                 'wl_title' => $title->getDBkey(),
 644                         ),
 645                         __METHOD__
 646                 );
 647                 $result['watchers'] = $watchers;
 648
 649                 // Total number of edits
 650                 $edits = (int)$dbr->selectField(
 651                         'revision',
 652                         'COUNT(rev_page)',
 653                         array( 'rev_page' => $id ),
 654                         __METHOD__
 655                 );
 656                 $result['edits'] = $edits;
 657
 658                 // Total number of distinct authors
 659                 $authors = (int)$dbr->selectField(
 660                         'revision',
 661                         'COUNT(DISTINCT rev_user_text)',
 662                         array( 'rev_page' => $id ),
 663                         __METHOD__
 664                 );
 665                 $result['authors'] = $authors;
 666
 667                 // "Recent" threshold defined by $wgRCMaxAge
 668                 $threshold = $dbr->timestamp( time() - $wgRCMaxAge );
 669
 670                 // Recent number of edits
 671                 $edits = (int)$dbr->selectField(
 672                         'revision',
 673                         'COUNT(rev_page)',
 674                         array(
 675                                 'rev_page' => $id,
 676                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 677                         ),
 678                         __METHOD__
 679                 );
 680                 $result['recent_edits'] = $edits;
 681
 682                 // Recent number of distinct authors
 683                 $authors = (int)$dbr->selectField(
 684                         'revision',
 685                         'COUNT(DISTINCT rev_user_text)',
 686                         array(
 687                                 'rev_page' => $id,
 688                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 689                         ),
 690                         __METHOD__
 691                 );
 692                 $result['recent_authors'] = $authors;
 693
 694                 // Subpages (if enabled)
 695                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 696                         $conds = array( 'page_namespace' => $title->getNamespace() );
 697                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 698
 699                         // Subpages of this page (redirects)
 700                         $conds['page_is_redirect'] = 1;
 701                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 702                                 'page',
 703                                 'COUNT(page_id)',
 704                                 $conds,
 705                                 __METHOD__ );
 706
 707                         // Subpages of this page (non-redirects)
 708                         $conds['page_is_redirect'] = 0;
 709                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 710                                 'page',
 711                                 'COUNT(page_id)',
 712                                 $conds,
 713                                 __METHOD__
 714                         );
 715
 716                         // Subpages of this page (total)
 717                         $result['subpages']['total'] = $result['subpages']['redirects']
 718                                 + $result['subpages']['nonredirects'];
 719                 }
 720
 721                 // Counts for the number of transclusion links (to/from)
 722                 $result['transclusion']['to'] = (int)$dbr->selectField(
 723                         'templatelinks',
 724                         'COUNT(tl_from)',
 725                         array(
 726                                 'tl_namespace' => $title->getNamespace(),
 727                                 'tl_title' => $title->getDBkey()
 728                         ),
 729                         __METHOD__
 730                 );
 731
 732                 $result['transclusion']['from'] = (int)$dbr->selectField(
 733                         'templatelinks',
 734                         'COUNT(*)',
 735                         array( 'tl_from' => $title->getArticleID() ),
 736                         __METHOD__
 737                 );
 738
 739                 wfProfileOut( __METHOD__ );
 740
 741                 return $result;
 742         }
 743
 744         /**
 745          * Returns the name that goes in the "<h1>" page title.
 746          *
 747          * @return string
 748          */
 749         protected function getPageTitle() {
 750                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 751         }
 752
 753         /**
 754          * Get a list of contributors of $article
 755          * @return string: html
 756          */
 757         protected function getContributors() {
 758                 global $wgHiddenPrefs;
 759
 760                 $contributors = $this->page->getContributors();
 761                 $real_names = array();
 762                 $user_names = array();
 763                 $anon_ips = array();
 764
 765                 # Sift for real versus user names
 766                 /** @var $user User */
 767                 foreach ( $contributors as $user ) {
 768                         $page = $user->isAnon()
 769                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 770                                 : $user->getUserPage();
 771
 772                         if ( $user->getID() == 0 ) {
 773                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 774                         } elseif ( !in_array( 'realname', $wgHiddenPrefs ) && $user->getRealName() ) {
 775                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 776                         } else {
 777                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 778                         }
 779                 }
 780
 781                 $lang = $this->getLanguage();
 782
 783                 $real = $lang->listToText( $real_names );
 784
 785                 # "ThisSite user(s) A, B and C"
 786                 if ( count( $user_names ) ) {
 787                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 788                                 count( $user_names ) )->escaped();
 789                 } else {
 790                         $user = false;
 791                 }
 792
 793                 if ( count( $anon_ips ) ) {
 794                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 795                                 count( $anon_ips ) )->escaped();
 796                 } else {
 797                         $anon = false;
 798                 }
 799
 800                 # This is the big list, all mooshed together. We sift for blank strings
 801                 $fulllist = array();
 802                 foreach ( array( $real, $user, $anon ) as $s ) {
 803                         if ( $s !== '' ) {
 804                                 array_push( $fulllist, $s );
 805                         }
 806                 }
 807
 808                 $count = count( $fulllist );
 809
 810                 # "Based on work by ..."
 811                 return $count
 812                         ? $this->msg( 'othercontribs' )->rawParams(
 813                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 814                         : '';
 815         }
 816
 817         /**
 818          * Returns the description that goes below the "<h1>" tag.
 819          *
 820          * @return string
 821          */
 822         protected function getDescription() {
 823                 return '';
 824         }
 825 }