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 name
  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          * @param int|null $revid Revision id to clear
  66          */
  67         public static function invalidateCache( Title $title, $revid = null ) {
  68                 $cache = ObjectCache::getMainWANInstance();
  69
  70                 if ( !$revid ) {
  71                         $revision = Revision::newFromTitle( $title, 0, Revision::READ_LATEST );
  72                         $revid = $revision ? $revision->getId() : null;
  73                 }
  74                 if ( $revid !== null ) {
  75                         $key = wfMemcKey( 'infoaction', sha1( $title->getPrefixedText() ), $revid );
  76                         $cache->delete( $key );
  77                 }
  78         }
  79
  80         /**
  81          * Shows page information on GET request.
  82          *
  83          * @return string Page information that will be added to the output
  84          */
  85         public function onView() {
  86                 $content = '';
  87
  88                 // Validate revision
  89                 $oldid = $this->page->getOldID();
  90                 if ( $oldid ) {
  91                         $revision = $this->page->getRevisionFetched();
  92
  93                         // Revision is missing
  94                         if ( $revision === null ) {
  95                                 return $this->msg( 'missing-revision', $oldid )->parse();
  96                         }
  97
  98                         // Revision is not current
  99                         if ( !$revision->isCurrent() ) {
 100                                 return $this->msg( 'pageinfo-not-current' )->plain();
 101                         }
 102                 }
 103
 104                 // Page header
 105                 if ( !$this->msg( 'pageinfo-header' )->isDisabled() ) {
 106                         $content .= $this->msg( 'pageinfo-header' )->parse();
 107                 }
 108
 109                 // Hide "This page is a member of # hidden categories" explanation
 110                 $content .= Html::element( 'style', array(),
 111                         '.mw-hiddenCategoriesExplanation { display: none; }' ) . "\n";
 112
 113                 // Hide "Templates used on this page" explanation
 114                 $content .= Html::element( 'style', array(),
 115                         '.mw-templatesUsedExplanation { display: none; }' ) . "\n";
 116
 117                 // Get page information
 118                 $pageInfo = $this->pageInfo();
 119
 120                 // Allow extensions to add additional information
 121                 Hooks::run( 'InfoAction', array( $this->getContext(), &$pageInfo ) );
 122
 123                 // Render page information
 124                 foreach ( $pageInfo as $header => $infoTable ) {
 125                         // Messages:
 126                         // pageinfo-header-basic, pageinfo-header-edits, pageinfo-header-restrictions,
 127                         // pageinfo-header-properties, pageinfo-category-info
 128                         $content .= $this->makeHeader( $this->msg( "pageinfo-${header}" )->escaped() ) . "\n";
 129                         $table = "\n";
 130                         foreach ( $infoTable as $infoRow ) {
 131                                 $name = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->escaped() : $infoRow[0];
 132                                 $value = ( $infoRow[1] instanceof Message ) ? $infoRow[1]->escaped() : $infoRow[1];
 133                                 $id = ( $infoRow[0] instanceof Message ) ? $infoRow[0]->getKey() : null;
 134                                 $table = $this->addRow( $table, $name, $value, $id ) . "\n";
 135                         }
 136                         $content = $this->addTable( $content, $table ) . "\n";
 137                 }
 138
 139                 // Page footer
 140                 if ( !$this->msg( 'pageinfo-footer' )->isDisabled() ) {
 141                         $content .= $this->msg( 'pageinfo-footer' )->parse();
 142                 }
 143
 144                 // Page credits
 145                 /*if ( $this->page->exists() ) {
 146                         $content .= Html::rawElement( 'div', array( 'id' => 'mw-credits' ), $this->getContributors() );
 147                 }*/
 148
 149                 return $content;
 150         }
 151
 152         /**
 153          * Creates a header that can be added to the output.
 154          *
 155          * @param string $header The header text.
 156          * @return string The HTML.
 157          */
 158         protected function makeHeader( $header ) {
 159                 $spanAttribs = array( 'class' => 'mw-headline', 'id' => Sanitizer::escapeId( $header ) );
 160
 161                 return Html::rawElement( 'h2', array(), Html::element( 'span', $spanAttribs, $header ) );
 162         }
 163
 164         /**
 165          * Adds a row to a table that will be added to the content.
 166          *
 167          * @param string $table The table that will be added to the content
 168          * @param string $name The name of the row
 169          * @param string $value The value of the row
 170          * @param string $id The ID to use for the 'tr' element
 171          * @return string The table with the row added
 172          */
 173         protected function addRow( $table, $name, $value, $id ) {
 174                 return $table . Html::rawElement( 'tr', $id === null ? array() : array( 'id' => 'mw-' . $id ),
 175                         Html::rawElement( 'td', array( 'style' => 'vertical-align: top;' ), $name ) .
 176                         Html::rawElement( 'td', array(), $value )
 177                 );
 178         }
 179
 180         /**
 181          * Adds a table to the content that will be added to the output.
 182          *
 183          * @param string $content The content that will be added to the output
 184          * @param string $table The table
 185          * @return string The content with the table added
 186          */
 187         protected function addTable( $content, $table ) {
 188                 return $content . Html::rawElement( 'table', array( 'class' => 'wikitable mw-page-info' ),
 189                         $table );
 190         }
 191
 192         /**
 193          * Returns page information in an easily-manipulated format. Array keys are used so extensions
 194          * may add additional information in arbitrary positions. Array values are arrays with one
 195          * element to be rendered as a header, arrays with two elements to be rendered as a table row.
 196          *
 197          * @return array
 198          */
 199         protected function pageInfo() {
 200                 global $wgContLang;
 201
 202                 $user = $this->getUser();
 203                 $lang = $this->getLanguage();
 204                 $title = $this->getTitle();
 205                 $id = $title->getArticleID();
 206                 $config = $this->context->getConfig();
 207
 208                 $cache = ObjectCache::getMainWANInstance();
 209                 $memcKey = wfMemcKey( 'infoaction',
 210                         sha1( $title->getPrefixedText() ), $this->page->getLatest() );
 211                 $pageCounts = $cache->get( $memcKey );
 212                 $version = isset( $pageCounts['cacheversion'] ) ? $pageCounts['cacheversion'] : false;
 213                 if ( $pageCounts === false || $version !== self::CACHE_VERSION ) {
 214                         // Get page information that would be too "expensive" to retrieve by normal means
 215                         $pageCounts = $this->pageCounts( $title );
 216                         $pageCounts['cacheversion'] = self::CACHE_VERSION;
 217
 218                         $cache->set( $memcKey, $pageCounts );
 219                 }
 220
 221                 // Get page properties
 222                 $dbr = wfGetDB( DB_SLAVE );
 223                 $result = $dbr->select(
 224                         'page_props',
 225                         array( 'pp_propname', 'pp_value' ),
 226                         array( 'pp_page' => $id ),
 227                         __METHOD__
 228                 );
 229
 230                 $pageProperties = array();
 231                 foreach ( $result as $row ) {
 232                         $pageProperties[$row->pp_propname] = $row->pp_value;
 233                 }
 234
 235                 // Basic information
 236                 $pageInfo = array();
 237                 $pageInfo['header-basic'] = array();
 238
 239                 // Display title
 240                 $displayTitle = $title->getPrefixedText();
 241                 if ( isset( $pageProperties['displaytitle'] ) ) {
 242                         $displayTitle = $pageProperties['displaytitle'];
 243                 }
 244
 245                 $pageInfo['header-basic'][] = array(
 246                         $this->msg( 'pageinfo-display-title' ), $displayTitle
 247                 );
 248
 249                 // Is it a redirect? If so, where to?
 250                 if ( $title->isRedirect() ) {
 251                         $pageInfo['header-basic'][] = array(
 252                                 $this->msg( 'pageinfo-redirectsto' ),
 253                                 Linker::link( $this->page->getRedirectTarget() ) .
 254                                 $this->msg( 'word-separator' )->escaped() .
 255                                 $this->msg( 'parentheses' )->rawParams( Linker::link(
 256                                         $this->page->getRedirectTarget(),
 257                                         $this->msg( 'pageinfo-redirectsto-info' )->escaped(),
 258                                         array(),
 259                                         array( 'action' => 'info' )
 260                                 ) )->escaped()
 261                         );
 262                 }
 263
 264                 // Default sort key
 265                 $sortKey = $title->getCategorySortkey();
 266                 if ( isset( $pageProperties['defaultsort'] ) ) {
 267                         $sortKey = $pageProperties['defaultsort'];
 268                 }
 269
 270                 $sortKey = htmlspecialchars( $sortKey );
 271                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-default-sort' ), $sortKey );
 272
 273                 // Page length (in bytes)
 274                 $pageInfo['header-basic'][] = array(
 275                         $this->msg( 'pageinfo-length' ), $lang->formatNum( $title->getLength() )
 276                 );
 277
 278                 // Page ID (number not localised, as it's a database ID)
 279                 $pageInfo['header-basic'][] = array( $this->msg( 'pageinfo-article-id' ), $id );
 280
 281                 // Language in which the page content is (supposed to be) written
 282                 $pageLang = $title->getPageLanguage()->getCode();
 283
 284                 if ( $config->get( 'PageLanguageUseDB' )
 285                         && $this->getTitle()->userCan( 'pagelang', $this->getUser() )
 286                 ) {
 287                         // Link to Special:PageLanguage with pre-filled page title if user has permissions
 288                         $titleObj = SpecialPage::getTitleFor( 'PageLanguage', $title->getPrefixedText() );
 289                         $langDisp = Linker::link(
 290                                 $titleObj,
 291                                 $this->msg( 'pageinfo-language' )->escaped()
 292                         );
 293                 } else {
 294                         // Display just the message
 295                         $langDisp = $this->msg( 'pageinfo-language' )->escaped();
 296                 }
 297
 298                 $pageInfo['header-basic'][] = array( $langDisp,
 299                         Language::fetchLanguageName( $pageLang, $lang->getCode() )
 300                         . ' ' . $this->msg( 'parentheses', $pageLang )->escaped() );
 301
 302                 // Content model of the page
 303                 $pageInfo['header-basic'][] = array(
 304                         $this->msg( 'pageinfo-content-model' ),
 305                         htmlspecialchars( ContentHandler::getLocalizedName( $title->getContentModel() ) )
 306                 );
 307
 308                 // Search engine status
 309                 $pOutput = new ParserOutput();
 310                 if ( isset( $pageProperties['noindex'] ) ) {
 311                         $pOutput->setIndexPolicy( 'noindex' );
 312                 }
 313                 if ( isset( $pageProperties['index'] ) ) {
 314                         $pOutput->setIndexPolicy( 'index' );
 315                 }
 316
 317                 // Use robot policy logic
 318                 $policy = $this->page->getRobotPolicy( 'view', $pOutput );
 319                 $pageInfo['header-basic'][] = array(
 320                         // Messages: pageinfo-robot-index, pageinfo-robot-noindex
 321                         $this->msg( 'pageinfo-robot-policy' ), $this->msg( "pageinfo-robot-${policy['index']}" )
 322                 );
 323
 324                 $unwatchedPageThreshold = $config->get( 'UnwatchedPageThreshold' );
 325                 if (
 326                         $user->isAllowed( 'unwatchedpages' ) ||
 327                         ( $unwatchedPageThreshold !== false &&
 328                                 $pageCounts['watchers'] >= $unwatchedPageThreshold )
 329                 ) {
 330                         // Number of page watchers
 331                         $pageInfo['header-basic'][] = array(
 332                                 $this->msg( 'pageinfo-watchers' ),
 333                                 $lang->formatNum( $pageCounts['watchers'] )
 334                         );
 335                         if (
 336                                 $config->get( 'ShowUpdatedMarker' ) &&
 337                                 isset( $pageCounts['visitingWatchers'] )
 338                         ) {
 339                                 $minToDisclose = $config->get( 'UnwatchedPageSecret' );
 340                                 if ( $pageCounts['visitingWatchers'] > $minToDisclose ||
 341                                         $user->isAllowed( 'unwatchedpages' ) ) {
 342                                         $pageInfo['header-basic'][] = array(
 343                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 344                                                 $lang->formatNum( $pageCounts['visitingWatchers'] )
 345                                         );
 346                                 } else {
 347                                         $pageInfo['header-basic'][] = array(
 348                                                 $this->msg( 'pageinfo-visiting-watchers' ),
 349                                                 $this->msg( 'pageinfo-few-visiting-watchers' )
 350                                         );
 351                                 }
 352                         }
 353                 } elseif ( $unwatchedPageThreshold !== false ) {
 354                         $pageInfo['header-basic'][] = array(
 355                                 $this->msg( 'pageinfo-watchers' ),
 356                                 $this->msg( 'pageinfo-few-watchers' )->numParams( $unwatchedPageThreshold )
 357                         );
 358                 }
 359
 360                 // Redirects to this page
 361                 $whatLinksHere = SpecialPage::getTitleFor( 'Whatlinkshere', $title->getPrefixedText() );
 362                 $pageInfo['header-basic'][] = array(
 363                         Linker::link(
 364                                 $whatLinksHere,
 365                                 $this->msg( 'pageinfo-redirects-name' )->escaped(),
 366                                 array(),
 367                                 array(
 368                                         'hidelinks' => 1,
 369                                         'hidetrans' => 1,
 370                                         'hideimages' => $title->getNamespace() == NS_FILE
 371                                 )
 372                         ),
 373                         $this->msg( 'pageinfo-redirects-value' )
 374                                 ->numParams( count( $title->getRedirectsHere() ) )
 375                 );
 376
 377                 // Is it counted as a content page?
 378                 if ( $this->page->isCountable() ) {
 379                         $pageInfo['header-basic'][] = array(
 380                                 $this->msg( 'pageinfo-contentpage' ),
 381                                 $this->msg( 'pageinfo-contentpage-yes' )
 382                         );
 383                 }
 384
 385                 // Subpages of this page, if subpages are enabled for the current NS
 386                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 387                         $prefixIndex = SpecialPage::getTitleFor( 'Prefixindex', $title->getPrefixedText() . '/' );
 388                         $pageInfo['header-basic'][] = array(
 389                                 Linker::link( $prefixIndex, $this->msg( 'pageinfo-subpages-name' )->escaped() ),
 390                                 $this->msg( 'pageinfo-subpages-value' )
 391                                         ->numParams(
 392                                                 $pageCounts['subpages']['total'],
 393                                                 $pageCounts['subpages']['redirects'],
 394                                                 $pageCounts['subpages']['nonredirects'] )
 395                         );
 396                 }
 397
 398                 if ( $title->inNamespace( NS_CATEGORY ) ) {
 399                         $category = Category::newFromTitle( $title );
 400
 401                         // $allCount is the total number of cat members,
 402                         // not the count of how many members are normal pages.
 403                         $allCount = (int)$category->getPageCount();
 404                         $subcatCount = (int)$category->getSubcatCount();
 405                         $fileCount = (int)$category->getFileCount();
 406                         $pagesCount = $allCount - $subcatCount - $fileCount;
 407
 408                         $pageInfo['category-info'] = array(
 409                                 array(
 410                                         $this->msg( 'pageinfo-category-total' ),
 411                                         $lang->formatNum( $allCount )
 412                                 ),
 413                                 array(
 414                                         $this->msg( 'pageinfo-category-pages' ),
 415                                         $lang->formatNum( $pagesCount )
 416                                 ),
 417                                 array(
 418                                         $this->msg( 'pageinfo-category-subcats' ),
 419                                         $lang->formatNum( $subcatCount )
 420                                 ),
 421                                 array(
 422                                         $this->msg( 'pageinfo-category-files' ),
 423                                         $lang->formatNum( $fileCount )
 424                                 )
 425                         );
 426                 }
 427
 428                 // Page protection
 429                 $pageInfo['header-restrictions'] = array();
 430
 431                 // Is this page affected by the cascading protection of something which includes it?
 432                 if ( $title->isCascadeProtected() ) {
 433                         $cascadingFrom = '';
 434                         $sources = $title->getCascadeProtectionSources(); // Array deferencing is in PHP 5.4 :(
 435
 436                         foreach ( $sources[0] as $sourceTitle ) {
 437                                 $cascadingFrom .= Html::rawElement( 'li', array(), Linker::linkKnown( $sourceTitle ) );
 438                         }
 439
 440                         $cascadingFrom = Html::rawElement( 'ul', array(), $cascadingFrom );
 441                         $pageInfo['header-restrictions'][] = array(
 442                                 $this->msg( 'pageinfo-protect-cascading-from' ),
 443                                 $cascadingFrom
 444                         );
 445                 }
 446
 447                 // Is out protection set to cascade to other pages?
 448                 if ( $title->areRestrictionsCascading() ) {
 449                         $pageInfo['header-restrictions'][] = array(
 450                                 $this->msg( 'pageinfo-protect-cascading' ),
 451                                 $this->msg( 'pageinfo-protect-cascading-yes' )
 452                         );
 453                 }
 454
 455                 // Page protection
 456                 foreach ( $title->getRestrictionTypes() as $restrictionType ) {
 457                         $protectionLevel = implode( ', ', $title->getRestrictions( $restrictionType ) );
 458
 459                         if ( $protectionLevel == '' ) {
 460                                 // Allow all users
 461                                 $message = $this->msg( 'protect-default' )->escaped();
 462                         } else {
 463                                 // Administrators only
 464                                 // Messages: protect-level-autoconfirmed, protect-level-sysop
 465                                 $message = $this->msg( "protect-level-$protectionLevel" );
 466                                 if ( $message->isDisabled() ) {
 467                                         // Require "$1" permission
 468                                         $message = $this->msg( "protect-fallback", $protectionLevel )->parse();
 469                                 } else {
 470                                         $message = $message->escaped();
 471                                 }
 472                         }
 473                         $expiry = $title->getRestrictionExpiry( $restrictionType );
 474                         $formattedexpiry = $this->msg( 'parentheses',
 475                                 $this->getLanguage()->formatExpiry( $expiry ) )->escaped();
 476                         $message .= $this->msg( 'word-separator' )->escaped() . $formattedexpiry;
 477
 478                         // Messages: restriction-edit, restriction-move, restriction-create,
 479                         // restriction-upload
 480                         $pageInfo['header-restrictions'][] = array(
 481                                 $this->msg( "restriction-$restrictionType" ), $message
 482                         );
 483                 }
 484
 485                 if ( !$this->page->exists() ) {
 486                         return $pageInfo;
 487                 }
 488
 489                 // Edit history
 490                 $pageInfo['header-edits'] = array();
 491
 492                 $firstRev = $this->page->getOldestRevision();
 493                 $lastRev = $this->page->getRevision();
 494                 $batch = new LinkBatch;
 495
 496                 if ( $firstRev ) {
 497                         $firstRevUser = $firstRev->getUserText( Revision::FOR_THIS_USER );
 498                         if ( $firstRevUser !== '' ) {
 499                                 $batch->add( NS_USER, $firstRevUser );
 500                                 $batch->add( NS_USER_TALK, $firstRevUser );
 501                         }
 502                 }
 503
 504                 if ( $lastRev ) {
 505                         $lastRevUser = $lastRev->getUserText( Revision::FOR_THIS_USER );
 506                         if ( $lastRevUser !== '' ) {
 507                                 $batch->add( NS_USER, $lastRevUser );
 508                                 $batch->add( NS_USER_TALK, $lastRevUser );
 509                         }
 510                 }
 511
 512                 $batch->execute();
 513
 514                 if ( $firstRev ) {
 515                         // Page creator
 516                         $pageInfo['header-edits'][] = array(
 517                                 $this->msg( 'pageinfo-firstuser' ),
 518                                 Linker::revUserTools( $firstRev )
 519                         );
 520
 521                         // Date of page creation
 522                         $pageInfo['header-edits'][] = array(
 523                                 $this->msg( 'pageinfo-firsttime' ),
 524                                 Linker::linkKnown(
 525                                         $title,
 526                                         htmlspecialchars( $lang->userTimeAndDate( $firstRev->getTimestamp(), $user ) ),
 527                                         array(),
 528                                         array( 'oldid' => $firstRev->getId() )
 529                                 )
 530                         );
 531                 }
 532
 533                 if ( $lastRev ) {
 534                         // Latest editor
 535                         $pageInfo['header-edits'][] = array(
 536                                 $this->msg( 'pageinfo-lastuser' ),
 537                                 Linker::revUserTools( $lastRev )
 538                         );
 539
 540                         // Date of latest edit
 541                         $pageInfo['header-edits'][] = array(
 542                                 $this->msg( 'pageinfo-lasttime' ),
 543                                 Linker::linkKnown(
 544                                         $title,
 545                                         htmlspecialchars( $lang->userTimeAndDate( $this->page->getTimestamp(), $user ) ),
 546                                         array(),
 547                                         array( 'oldid' => $this->page->getLatest() )
 548                                 )
 549                         );
 550                 }
 551
 552                 // Total number of edits
 553                 $pageInfo['header-edits'][] = array(
 554                         $this->msg( 'pageinfo-edits' ), $lang->formatNum( $pageCounts['edits'] )
 555                 );
 556
 557                 // Total number of distinct authors
 558                 if ( $pageCounts['authors'] > 0 ) {
 559                         $pageInfo['header-edits'][] = array(
 560                                 $this->msg( 'pageinfo-authors' ), $lang->formatNum( $pageCounts['authors'] )
 561                         );
 562                 }
 563
 564                 // Recent number of edits (within past 30 days)
 565                 $pageInfo['header-edits'][] = array(
 566                         $this->msg( 'pageinfo-recent-edits', $lang->formatDuration( $config->get( 'RCMaxAge' ) ) ),
 567                         $lang->formatNum( $pageCounts['recent_edits'] )
 568                 );
 569
 570                 // Recent number of distinct authors
 571                 $pageInfo['header-edits'][] = array(
 572                         $this->msg( 'pageinfo-recent-authors' ), $lang->formatNum( $pageCounts['recent_authors'] )
 573                 );
 574
 575                 // Array of MagicWord objects
 576                 $magicWords = MagicWord::getDoubleUnderscoreArray();
 577
 578                 // Array of magic word IDs
 579                 $wordIDs = $magicWords->names;
 580
 581                 // Array of IDs => localized magic words
 582                 $localizedWords = $wgContLang->getMagicWords();
 583
 584                 $listItems = array();
 585                 foreach ( $pageProperties as $property => $value ) {
 586                         if ( in_array( $property, $wordIDs ) ) {
 587                                 $listItems[] = Html::element( 'li', array(), $localizedWords[$property][1] );
 588                         }
 589                 }
 590
 591                 $localizedList = Html::rawElement( 'ul', array(), implode( '', $listItems ) );
 592                 $hiddenCategories = $this->page->getHiddenCategories();
 593
 594                 if (
 595                         count( $listItems ) > 0 ||
 596                         count( $hiddenCategories ) > 0 ||
 597                         $pageCounts['transclusion']['from'] > 0 ||
 598                         $pageCounts['transclusion']['to'] > 0
 599                 ) {
 600                         $options = array( 'LIMIT' => $config->get( 'PageInfoTransclusionLimit' ) );
 601                         $transcludedTemplates = $title->getTemplateLinksFrom( $options );
 602                         if ( $config->get( 'MiserMode' ) ) {
 603                                 $transcludedTargets = array();
 604                         } else {
 605                                 $transcludedTargets = $title->getTemplateLinksTo( $options );
 606                         }
 607
 608                         // Page properties
 609                         $pageInfo['header-properties'] = array();
 610
 611                         // Magic words
 612                         if ( count( $listItems ) > 0 ) {
 613                                 $pageInfo['header-properties'][] = array(
 614                                         $this->msg( 'pageinfo-magic-words' )->numParams( count( $listItems ) ),
 615                                         $localizedList
 616                                 );
 617                         }
 618
 619                         // Hidden categories
 620                         if ( count( $hiddenCategories ) > 0 ) {
 621                                 $pageInfo['header-properties'][] = array(
 622                                         $this->msg( 'pageinfo-hidden-categories' )
 623                                                 ->numParams( count( $hiddenCategories ) ),
 624                                         Linker::formatHiddenCategories( $hiddenCategories )
 625                                 );
 626                         }
 627
 628                         // Transcluded templates
 629                         if ( $pageCounts['transclusion']['from'] > 0 ) {
 630                                 if ( $pageCounts['transclusion']['from'] > count( $transcludedTemplates ) ) {
 631                                         $more = $this->msg( 'morenotlisted' )->escaped();
 632                                 } else {
 633                                         $more = null;
 634                                 }
 635
 636                                 $pageInfo['header-properties'][] = array(
 637                                         $this->msg( 'pageinfo-templates' )
 638                                                 ->numParams( $pageCounts['transclusion']['from'] ),
 639                                         Linker::formatTemplates(
 640                                                 $transcludedTemplates,
 641                                                 false,
 642                                                 false,
 643                                                 $more )
 644                                 );
 645                         }
 646
 647                         if ( !$config->get( 'MiserMode' ) && $pageCounts['transclusion']['to'] > 0 ) {
 648                                 if ( $pageCounts['transclusion']['to'] > count( $transcludedTargets ) ) {
 649                                         $more = Linker::link(
 650                                                 $whatLinksHere,
 651                                                 $this->msg( 'moredotdotdot' )->escaped(),
 652                                                 array(),
 653                                                 array( 'hidelinks' => 1, 'hideredirs' => 1 )
 654                                         );
 655                                 } else {
 656                                         $more = null;
 657                                 }
 658
 659                                 $pageInfo['header-properties'][] = array(
 660                                         $this->msg( 'pageinfo-transclusions' )
 661                                                 ->numParams( $pageCounts['transclusion']['to'] ),
 662                                         Linker::formatTemplates(
 663                                                 $transcludedTargets,
 664                                                 false,
 665                                                 false,
 666                                                 $more )
 667                                 );
 668                         }
 669                 }
 670
 671                 return $pageInfo;
 672         }
 673
 674         /**
 675          * Returns page counts that would be too "expensive" to retrieve by normal means.
 676          *
 677          * @param Title $title Title to get counts for
 678          * @return array
 679          */
 680         protected function pageCounts( Title $title ) {
 681                 $id = $title->getArticleID();
 682                 $config = $this->context->getConfig();
 683
 684                 $dbrWatchlist = wfGetDB( DB_SLAVE, 'watchlist' );
 685                 $result = array();
 686
 687                 // Number of page watchers
 688                 $watchers = (int)$dbrWatchlist->selectField(
 689                         'watchlist',
 690                         'COUNT(*)',
 691                         array(
 692                                 'wl_namespace' => $title->getNamespace(),
 693                                 'wl_title' => $title->getDBkey(),
 694                         ),
 695                         __METHOD__
 696                 );
 697                 $result['watchers'] = $watchers;
 698
 699                 if ( $config->get( 'ShowUpdatedMarker' ) ) {
 700                         // Threshold: last visited about 26 weeks before latest edit
 701                         $updated = wfTimestamp( TS_UNIX, $this->page->getTimestamp() );
 702                         $age = $config->get( 'WatchersMaxAge' );
 703                         $threshold = $dbrWatchlist->timestamp( $updated - $age );
 704                         // Number of page watchers who also visited a "recent" edit
 705                         $visitingWatchers = (int)$dbrWatchlist->selectField(
 706                                 'watchlist',
 707                                 'COUNT(*)',
 708                                 array(
 709                                         'wl_namespace' => $title->getNamespace(),
 710                                         'wl_title' => $title->getDBkey(),
 711                                         'wl_notificationtimestamp >= ' . $dbrWatchlist->addQuotes( $threshold ) .
 712                                         ' OR wl_notificationtimestamp IS NULL'
 713                                 ),
 714                                 __METHOD__
 715                         );
 716                         $result['visitingWatchers'] = $visitingWatchers;
 717                 }
 718
 719                 $dbr = wfGetDB( DB_SLAVE );
 720                 // Total number of edits
 721                 $edits = (int)$dbr->selectField(
 722                         'revision',
 723                         'COUNT(*)',
 724                         array( 'rev_page' => $id ),
 725                         __METHOD__
 726                 );
 727                 $result['edits'] = $edits;
 728
 729                 // Total number of distinct authors
 730                 if ( $config->get( 'MiserMode' ) ) {
 731                         $result['authors'] = 0;
 732                 } else {
 733                         $result['authors'] = (int)$dbr->selectField(
 734                                 'revision',
 735                                 'COUNT(DISTINCT rev_user_text)',
 736                                 array( 'rev_page' => $id ),
 737                                 __METHOD__
 738                         );
 739                 }
 740
 741                 // "Recent" threshold defined by RCMaxAge setting
 742                 $threshold = $dbr->timestamp( time() - $config->get( 'RCMaxAge' ) );
 743
 744                 // Recent number of edits
 745                 $edits = (int)$dbr->selectField(
 746                         'revision',
 747                         'COUNT(rev_page)',
 748                         array(
 749                                 'rev_page' => $id,
 750                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 751                         ),
 752                         __METHOD__
 753                 );
 754                 $result['recent_edits'] = $edits;
 755
 756                 // Recent number of distinct authors
 757                 $result['recent_authors'] = (int)$dbr->selectField(
 758                         'revision',
 759                         'COUNT(DISTINCT rev_user_text)',
 760                         array(
 761                                 'rev_page' => $id,
 762                                 "rev_timestamp >= " . $dbr->addQuotes( $threshold )
 763                         ),
 764                         __METHOD__
 765                 );
 766
 767                 // Subpages (if enabled)
 768                 if ( MWNamespace::hasSubpages( $title->getNamespace() ) ) {
 769                         $conds = array( 'page_namespace' => $title->getNamespace() );
 770                         $conds[] = 'page_title ' . $dbr->buildLike( $title->getDBkey() . '/', $dbr->anyString() );
 771
 772                         // Subpages of this page (redirects)
 773                         $conds['page_is_redirect'] = 1;
 774                         $result['subpages']['redirects'] = (int)$dbr->selectField(
 775                                 'page',
 776                                 'COUNT(page_id)',
 777                                 $conds,
 778                                 __METHOD__ );
 779
 780                         // Subpages of this page (non-redirects)
 781                         $conds['page_is_redirect'] = 0;
 782                         $result['subpages']['nonredirects'] = (int)$dbr->selectField(
 783                                 'page',
 784                                 'COUNT(page_id)',
 785                                 $conds,
 786                                 __METHOD__
 787                         );
 788
 789                         // Subpages of this page (total)
 790                         $result['subpages']['total'] = $result['subpages']['redirects']
 791                                 + $result['subpages']['nonredirects'];
 792                 }
 793
 794                 // Counts for the number of transclusion links (to/from)
 795                 if ( $config->get( 'MiserMode' ) ) {
 796                         $result['transclusion']['to'] = 0;
 797                 } else {
 798                         $result['transclusion']['to'] = (int)$dbr->selectField(
 799                                 'templatelinks',
 800                                 'COUNT(tl_from)',
 801                                 array(
 802                                         'tl_namespace' => $title->getNamespace(),
 803                                         'tl_title' => $title->getDBkey()
 804                                 ),
 805                                 __METHOD__
 806                         );
 807                 }
 808
 809                 $result['transclusion']['from'] = (int)$dbr->selectField(
 810                         'templatelinks',
 811                         'COUNT(*)',
 812                         array( 'tl_from' => $title->getArticleID() ),
 813                         __METHOD__
 814                 );
 815
 816                 return $result;
 817         }
 818
 819         /**
 820          * Returns the name that goes in the "<h1>" page title.
 821          *
 822          * @return string
 823          */
 824         protected function getPageTitle() {
 825                 return $this->msg( 'pageinfo-title', $this->getTitle()->getPrefixedText() )->text();
 826         }
 827
 828         /**
 829          * Get a list of contributors of $article
 830          * @return string Html
 831          */
 832         protected function getContributors() {
 833                 $contributors = $this->page->getContributors();
 834                 $real_names = array();
 835                 $user_names = array();
 836                 $anon_ips = array();
 837
 838                 # Sift for real versus user names
 839                 /** @var $user User */
 840                 foreach ( $contributors as $user ) {
 841                         $page = $user->isAnon()
 842                                 ? SpecialPage::getTitleFor( 'Contributions', $user->getName() )
 843                                 : $user->getUserPage();
 844
 845                         $hiddenPrefs = $this->context->getConfig()->get( 'HiddenPrefs' );
 846                         if ( $user->getID() == 0 ) {
 847                                 $anon_ips[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 848                         } elseif ( !in_array( 'realname', $hiddenPrefs ) && $user->getRealName() ) {
 849                                 $real_names[] = Linker::link( $page, htmlspecialchars( $user->getRealName() ) );
 850                         } else {
 851                                 $user_names[] = Linker::link( $page, htmlspecialchars( $user->getName() ) );
 852                         }
 853                 }
 854
 855                 $lang = $this->getLanguage();
 856
 857                 $real = $lang->listToText( $real_names );
 858
 859                 # "ThisSite user(s) A, B and C"
 860                 if ( count( $user_names ) ) {
 861                         $user = $this->msg( 'siteusers' )->rawParams( $lang->listToText( $user_names ) )->params(
 862                                 count( $user_names ) )->escaped();
 863                 } else {
 864                         $user = false;
 865                 }
 866
 867                 if ( count( $anon_ips ) ) {
 868                         $anon = $this->msg( 'anonusers' )->rawParams( $lang->listToText( $anon_ips ) )->params(
 869                                 count( $anon_ips ) )->escaped();
 870                 } else {
 871                         $anon = false;
 872                 }
 873
 874                 # This is the big list, all mooshed together. We sift for blank strings
 875                 $fulllist = array();
 876                 foreach ( array( $real, $user, $anon ) as $s ) {
 877                         if ( $s !== '' ) {
 878                                 array_push( $fulllist, $s );
 879                         }
 880                 }
 881
 882                 $count = count( $fulllist );
 883
 884                 # "Based on work by ..."
 885                 return $count
 886                         ? $this->msg( 'othercontribs' )->rawParams(
 887                                 $lang->listToText( $fulllist ) )->params( $count )->escaped()
 888                         : '';
 889         }
 890
 891         /**
 892          * Returns the description that goes below the "<h1>" tag.
 893          *
 894          * @return string
 895          */
 896         protected function getDescription() {
 897                 return '';
 898         }
 899 }