includes/api/ApiQueryInfo.php

   1 <?php
   2 /**
   3  * API for MediaWiki 1.8+
   4  *
   5  * Created on Sep 25, 2006
   6  *
   7  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 if ( !defined( 'MEDIAWIKI' ) ) {
  28         // Eclipse helper - will be ignored in production
  29         require_once( 'ApiQueryBase.php' );
  30 }
  31
  32 /**
  33  * A query module to show basic page information.
  34  *
  35  * @ingroup API
  36  */
  37 class ApiQueryInfo extends ApiQueryBase {
  38
  39         private $fld_protection = false, $fld_talkid = false,
  40                 $fld_subjectid = false, $fld_url = false,
  41                 $fld_readable = false, $fld_watched = false,
  42                 $fld_preload = false, $fld_displaytitle = false;
  43
  44         private $tokenFunctions;
  45
  46         public function __construct( $query, $moduleName ) {
  47                 parent::__construct( $query, $moduleName, 'in' );
  48         }
  49
  50         public function requestExtraData( $pageSet ) {
  51                 global $wgDisableCounters;
  52
  53                 $pageSet->requestField( 'page_restrictions' );
  54                 $pageSet->requestField( 'page_is_redirect' );
  55                 $pageSet->requestField( 'page_is_new' );
  56                 if ( !$wgDisableCounters ) {
  57                         $pageSet->requestField( 'page_counter' );
  58                 }
  59                 $pageSet->requestField( 'page_touched' );
  60                 $pageSet->requestField( 'page_latest' );
  61                 $pageSet->requestField( 'page_len' );
  62         }
  63
  64         /**
  65          * Get an array mapping token names to their handler functions.
  66          * The prototype for a token function is func($pageid, $title)
  67          * it should return a token or false (permission denied)
  68          * @return array(tokenname => function)
  69          */
  70         protected function getTokenFunctions() {
  71                 // Don't call the hooks twice
  72                 if ( isset( $this->tokenFunctions ) ) {
  73                         return $this->tokenFunctions;
  74                 }
  75
  76                 // If we're in JSON callback mode, no tokens can be obtained
  77                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  78                         return array();
  79                 }
  80
  81                 $this->tokenFunctions = array(
  82                         'edit' => array( 'ApiQueryInfo', 'getEditToken' ),
  83                         'delete' => array( 'ApiQueryInfo', 'getDeleteToken' ),
  84                         'protect' => array( 'ApiQueryInfo', 'getProtectToken' ),
  85                         'move' => array( 'ApiQueryInfo', 'getMoveToken' ),
  86                         'block' => array( 'ApiQueryInfo', 'getBlockToken' ),
  87                         'unblock' => array( 'ApiQueryInfo', 'getUnblockToken' ),
  88                         'email' => array( 'ApiQueryInfo', 'getEmailToken' ),
  89                         'import' => array( 'ApiQueryInfo', 'getImportToken' ),
  90                         'patrol' => array( 'ApiQueryRecentChanges', 'getPatrolToken' ),
  91                 );
  92                 wfRunHooks( 'APIQueryInfoTokens', array( &$this->tokenFunctions ) );
  93                 return $this->tokenFunctions;
  94         }
  95
  96         public static function getEditToken( $pageid, $title ) {
  97                 // We could check for $title->userCan('edit') here,
  98                 // but that's too expensive for this purpose
  99                 // and would break caching
 100                 global $wgUser;
 101                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 102                         return false;
 103                 }
 104
 105                 // The edit token is always the same, let's exploit that
 106                 static $cachedEditToken = null;
 107                 if ( !is_null( $cachedEditToken ) ) {
 108                         return $cachedEditToken;
 109                 }
 110
 111                 $cachedEditToken = $wgUser->editToken();
 112                 return $cachedEditToken;
 113         }
 114
 115         public static function getDeleteToken( $pageid, $title ) {
 116                 global $wgUser;
 117                 if ( !$wgUser->isAllowed( 'delete' ) ) {
 118                         return false;
 119                 }
 120
 121                 static $cachedDeleteToken = null;
 122                 if ( !is_null( $cachedDeleteToken ) ) {
 123                         return $cachedDeleteToken;
 124                 }
 125
 126                 $cachedDeleteToken = $wgUser->editToken();
 127                 return $cachedDeleteToken;
 128         }
 129
 130         public static function getProtectToken( $pageid, $title ) {
 131                 global $wgUser;
 132                 if ( !$wgUser->isAllowed( 'protect' ) ) {
 133                         return false;
 134                 }
 135
 136                 static $cachedProtectToken = null;
 137                 if ( !is_null( $cachedProtectToken ) ) {
 138                         return $cachedProtectToken;
 139                 }
 140
 141                 $cachedProtectToken = $wgUser->editToken();
 142                 return $cachedProtectToken;
 143         }
 144
 145         public static function getMoveToken( $pageid, $title ) {
 146                 global $wgUser;
 147                 if ( !$wgUser->isAllowed( 'move' ) ) {
 148                         return false;
 149                 }
 150
 151                 static $cachedMoveToken = null;
 152                 if ( !is_null( $cachedMoveToken ) ) {
 153                         return $cachedMoveToken;
 154                 }
 155
 156                 $cachedMoveToken = $wgUser->editToken();
 157                 return $cachedMoveToken;
 158         }
 159
 160         public static function getBlockToken( $pageid, $title ) {
 161                 global $wgUser;
 162                 if ( !$wgUser->isAllowed( 'block' ) ) {
 163                         return false;
 164                 }
 165
 166                 static $cachedBlockToken = null;
 167                 if ( !is_null( $cachedBlockToken ) ) {
 168                         return $cachedBlockToken;
 169                 }
 170
 171                 $cachedBlockToken = $wgUser->editToken();
 172                 return $cachedBlockToken;
 173         }
 174
 175         public static function getUnblockToken( $pageid, $title ) {
 176                 // Currently, this is exactly the same as the block token
 177                 return self::getBlockToken( $pageid, $title );
 178         }
 179
 180         public static function getEmailToken( $pageid, $title ) {
 181                 global $wgUser;
 182                 if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailUser() ) {
 183                         return false;
 184                 }
 185
 186                 static $cachedEmailToken = null;
 187                 if ( !is_null( $cachedEmailToken ) ) {
 188                         return $cachedEmailToken;
 189                 }
 190
 191                 $cachedEmailToken = $wgUser->editToken();
 192                 return $cachedEmailToken;
 193         }
 194
 195         public static function getImportToken( $pageid, $title ) {
 196                 global $wgUser;
 197                 if ( !$wgUser->isAllowed( 'import' ) ) {
 198                         return false;
 199                 }
 200
 201                 static $cachedImportToken = null;
 202                 if ( !is_null( $cachedImportToken ) ) {
 203                         return $cachedImportToken;
 204                 }
 205
 206                 $cachedImportToken = $wgUser->editToken();
 207                 return $cachedImportToken;
 208         }
 209
 210         public function execute() {
 211                 $this->params = $this->extractRequestParams();
 212                 if ( !is_null( $this->params['prop'] ) ) {
 213                         $prop = array_flip( $this->params['prop'] );
 214                         $this->fld_protection = isset( $prop['protection'] );
 215                         $this->fld_watched = isset( $prop['watched'] );
 216                         $this->fld_talkid = isset( $prop['talkid'] );
 217                         $this->fld_subjectid = isset( $prop['subjectid'] );
 218                         $this->fld_url = isset( $prop['url'] );
 219                         $this->fld_readable = isset( $prop['readable'] );
 220                         $this->fld_preload = isset( $prop['preload'] );
 221                         $this->fld_displaytitle = isset( $prop['displaytitle'] );
 222                 }
 223
 224                 $pageSet = $this->getPageSet();
 225                 $this->titles = $pageSet->getGoodTitles();
 226                 $this->missing = $pageSet->getMissingTitles();
 227                 $this->everything = $this->titles + $this->missing;
 228                 $result = $this->getResult();
 229
 230                 uasort( $this->everything, array( 'Title', 'compare' ) );
 231                 if ( !is_null( $this->params['continue'] ) ) {
 232                         // Throw away any titles we're gonna skip so they don't
 233                         // clutter queries
 234                         $cont = explode( '|', $this->params['continue'] );
 235                         if ( count( $cont ) != 2 ) {
 236                                 $this->dieUsage( 'Invalid continue param. You should pass the original ' .
 237                                                 'value returned by the previous query', '_badcontinue' );
 238                         }
 239                         $conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
 240                         foreach ( $this->everything as $pageid => $title ) {
 241                                 if ( Title::compare( $title, $conttitle ) >= 0 ) {
 242                                         break;
 243                                 }
 244                                 unset( $this->titles[$pageid] );
 245                                 unset( $this->missing[$pageid] );
 246                                 unset( $this->everything[$pageid] );
 247                         }
 248                 }
 249
 250                 $this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
 251                 $this->pageIsRedir = $pageSet->getCustomField( 'page_is_redirect' );
 252                 $this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );
 253
 254                 global $wgDisableCounters;
 255
 256                 if ( !$wgDisableCounters ) {
 257                         $this->pageCounter = $pageSet->getCustomField( 'page_counter' );
 258                 }
 259                 $this->pageTouched = $pageSet->getCustomField( 'page_touched' );
 260                 $this->pageLatest = $pageSet->getCustomField( 'page_latest' );
 261                 $this->pageLength = $pageSet->getCustomField( 'page_len' );
 262
 263                 // Get protection info if requested
 264                 if ( $this->fld_protection ) {
 265                         $this->getProtectionInfo();
 266                 }
 267
 268                 if ( $this->fld_watched ) {
 269                         $this->getWatchedInfo();
 270                 }
 271
 272                 // Run the talkid/subjectid query if requested
 273                 if ( $this->fld_talkid || $this->fld_subjectid ) {
 274                         $this->getTSIDs();
 275                 }
 276
 277                 if ( $this->fld_displaytitle ) {
 278                         $this->getDisplayTitle();
 279                 }
 280
 281                 foreach ( $this->everything as $pageid => $title ) {
 282                         $pageInfo = $this->extractPageInfo( $pageid, $title );
 283                         $fit = $result->addValue( array(
 284                                 'query',
 285                                 'pages'
 286                         ), $pageid, $pageInfo );
 287                         if ( !$fit ) {
 288                                 $this->setContinueEnumParameter( 'continue',
 289                                                 $title->getNamespace() . '|' .
 290                                                 $title->getText() );
 291                                 break;
 292                         }
 293                 }
 294         }
 295
 296         /**
 297          * Get a result array with information about a title
 298          * @param $pageid int Page ID (negative for missing titles)
 299          * @param $title Title object
 300          * @return array
 301          */
 302         private function extractPageInfo( $pageid, $title ) {
 303                 $pageInfo = array();
 304                 if ( $title->exists() ) {
 305                         global $wgDisableCounters;
 306
 307                         $pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
 308                         $pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
 309                         $pageInfo['counter'] = $wgDisableCounters
 310                                 ? ""
 311                                 : intval( $this->pageCounter[$pageid] );
 312                         $pageInfo['length'] = intval( $this->pageLength[$pageid] );
 313
 314                         if ( $this->pageIsRedir[$pageid] ) {
 315                                 $pageInfo['redirect'] = '';
 316                         }
 317                         if ( $this->pageIsNew[$pageid] ) {
 318                                 $pageInfo['new'] = '';
 319                         }
 320                 }
 321
 322                 if ( !is_null( $this->params['token'] ) ) {
 323                         $tokenFunctions = $this->getTokenFunctions();
 324                         $pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
 325                         foreach ( $this->params['token'] as $t ) {
 326                                 $val = call_user_func( $tokenFunctions[$t], $pageid, $title );
 327                                 if ( $val === false ) {
 328                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 329                                 } else {
 330                                         $pageInfo[$t . 'token'] = $val;
 331                                 }
 332                         }
 333                 }
 334
 335                 if ( $this->fld_protection ) {
 336                         $pageInfo['protection'] = array();
 337                         if ( isset( $this->protections[$title->getNamespace()][$title->getDBkey()] ) ) {
 338                                 $pageInfo['protection'] =
 339                                         $this->protections[$title->getNamespace()][$title->getDBkey()];
 340                         }
 341                         $this->getResult()->setIndexedTagName( $pageInfo['protection'], 'pr' );
 342                 }
 343
 344                 if ( $this->fld_watched && isset( $this->watched[$title->getNamespace()][$title->getDBkey()] ) ) {
 345                         $pageInfo['watched'] = '';
 346                 }
 347
 348                 if ( $this->fld_talkid && isset( $this->talkids[$title->getNamespace()][$title->getDBkey()] ) ) {
 349                         $pageInfo['talkid'] = $this->talkids[$title->getNamespace()][$title->getDBkey()];
 350                 }
 351
 352                 if ( $this->fld_subjectid && isset( $this->subjectids[$title->getNamespace()][$title->getDBkey()] ) ) {
 353                         $pageInfo['subjectid'] = $this->subjectids[$title->getNamespace()][$title->getDBkey()];
 354                 }
 355
 356                 if ( $this->fld_url ) {
 357                         $pageInfo['fullurl'] = $title->getFullURL();
 358                         $pageInfo['editurl'] = $title->getFullURL( 'action=edit' );
 359                 }
 360                 if ( $this->fld_readable && $title->userCanRead() ) {
 361                         $pageInfo['readable'] = '';
 362                 }
 363
 364                 if ( $this->fld_preload ) {
 365                         if ( $title->exists() ) {
 366                                 $pageInfo['preload'] = '';
 367                         } else {
 368                                 $text = null;
 369                                 wfRunHooks( 'EditFormPreloadText', array( &$text, &$title ) );
 370
 371                                 $pageInfo['preload'] = $text;
 372                         }
 373                 }
 374
 375                 if ( $this->fld_displaytitle ) {
 376                         if ( isset( $this->displaytitles[$title->getArticleId()] ) ) {
 377                                 $pageInfo['displaytitle'] = $this->displaytitles[$title->getArticleId()];
 378                         } else {
 379                                 $pageInfo['displaytitle'] = $title->getPrefixedText();
 380                         }
 381                 }
 382
 383                 return $pageInfo;
 384         }
 385
 386         /**
 387          * Get information about protections and put it in $protections
 388          */
 389         private function getProtectionInfo() {
 390                 $this->protections = array();
 391                 $db = $this->getDB();
 392
 393                 // Get normal protections for existing titles
 394                 if ( count( $this->titles ) ) {
 395                         $this->resetQueryParams();
 396                         $this->addTables( array( 'page_restrictions', 'page' ) );
 397                         $this->addWhere( 'page_id=pr_page' );
 398                         $this->addFields( array( 'pr_page', 'pr_type', 'pr_level',
 399                                         'pr_expiry', 'pr_cascade', 'page_namespace',
 400                                         'page_title' ) );
 401                         $this->addWhereFld( 'pr_page', array_keys( $this->titles ) );
 402
 403                         $res = $this->select( __METHOD__ );
 404                         foreach ( $res as $row ) {
 405                                 $a = array(
 406                                         'type' => $row->pr_type,
 407                                         'level' => $row->pr_level,
 408                                         'expiry' => Block::decodeExpiry( $row->pr_expiry, TS_ISO_8601 )
 409                                 );
 410                                 if ( $row->pr_cascade ) {
 411                                         $a['cascade'] = '';
 412                                 }
 413                                 $this->protections[$row->page_namespace][$row->page_title][] = $a;
 414
 415                                 // Also check old restrictions
 416                                 if ( $this->pageRestrictions[$row->pr_page] ) {
 417                                         $restrictions = explode( ':', trim( $this->pageRestrictions[$row->pr_page] ) );
 418                                         foreach ( $restrictions as $restrict ) {
 419                                                 $temp = explode( '=', trim( $restrict ) );
 420                                                 if ( count( $temp ) == 1 ) {
 421                                                         // old old format should be treated as edit/move restriction
 422                                                         $restriction = trim( $temp[0] );
 423
 424                                                         if ( $restriction == '' ) {
 425                                                                 continue;
 426                                                         }
 427                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 428                                                                 'type' => 'edit',
 429                                                                 'level' => $restriction,
 430                                                                 'expiry' => 'infinity',
 431                                                         );
 432                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 433                                                                 'type' => 'move',
 434                                                                 'level' => $restriction,
 435                                                                 'expiry' => 'infinity',
 436                                                         );
 437                                                 } else {
 438                                                         $restriction = trim( $temp[1] );
 439                                                         if ( $restriction == '' ) {
 440                                                                 continue;
 441                                                         }
 442                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 443                                                                 'type' => $temp[0],
 444                                                                 'level' => $restriction,
 445                                                                 'expiry' => 'infinity',
 446                                                         );
 447                                                 }
 448                                         }
 449                                 }
 450                         }
 451                 }
 452
 453                 // Get protections for missing titles
 454                 if ( count( $this->missing ) ) {
 455                         $this->resetQueryParams();
 456                         $lb = new LinkBatch( $this->missing );
 457                         $this->addTables( 'protected_titles' );
 458                         $this->addFields( array( 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ) );
 459                         $this->addWhere( $lb->constructSet( 'pt', $db ) );
 460                         $res = $this->select( __METHOD__ );
 461                         foreach ( $res as $row ) {
 462                                 $this->protections[$row->pt_namespace][$row->pt_title][] = array(
 463                                         'type' => 'create',
 464                                         'level' => $row->pt_create_perm,
 465                                         'expiry' => Block::decodeExpiry( $row->pt_expiry, TS_ISO_8601 )
 466                                 );
 467                         }
 468                 }
 469
 470                 // Cascading protections
 471                 $images = $others = array();
 472                 foreach ( $this->everything as $title ) {
 473                         if ( $title->getNamespace() == NS_FILE ) {
 474                                 $images[] = $title->getDBkey();
 475                         } else {
 476                                 $others[] = $title;
 477                         }
 478                 }
 479
 480                 if ( count( $others ) ) {
 481                         // Non-images: check templatelinks
 482                         $lb = new LinkBatch( $others );
 483                         $this->resetQueryParams();
 484                         $this->addTables( array( 'page_restrictions', 'page', 'templatelinks' ) );
 485                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 486                                         'page_title', 'page_namespace',
 487                                         'tl_title', 'tl_namespace' ) );
 488                         $this->addWhere( $lb->constructSet( 'tl', $db ) );
 489                         $this->addWhere( 'pr_page = page_id' );
 490                         $this->addWhere( 'pr_page = tl_from' );
 491                         $this->addWhereFld( 'pr_cascade', 1 );
 492
 493                         $res = $this->select( __METHOD__ );
 494                         foreach ( $res as $row ) {
 495                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 496                                 $this->protections[$row->tl_namespace][$row->tl_title][] = array(
 497                                         'type' => $row->pr_type,
 498                                         'level' => $row->pr_level,
 499                                         'expiry' => Block::decodeExpiry( $row->pr_expiry, TS_ISO_8601 ),
 500                                         'source' => $source->getPrefixedText()
 501                                 );
 502                         }
 503                 }
 504
 505                 if ( count( $images ) ) {
 506                         // Images: check imagelinks
 507                         $this->resetQueryParams();
 508                         $this->addTables( array( 'page_restrictions', 'page', 'imagelinks' ) );
 509                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 510                                         'page_title', 'page_namespace', 'il_to' ) );
 511                         $this->addWhere( 'pr_page = page_id' );
 512                         $this->addWhere( 'pr_page = il_from' );
 513                         $this->addWhereFld( 'pr_cascade', 1 );
 514                         $this->addWhereFld( 'il_to', $images );
 515
 516                         $res = $this->select( __METHOD__ );
 517                         foreach ( $res as $row ) {
 518                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 519                                 $this->protections[NS_FILE][$row->il_to][] = array(
 520                                         'type' => $row->pr_type,
 521                                         'level' => $row->pr_level,
 522                                         'expiry' => Block::decodeExpiry( $row->pr_expiry, TS_ISO_8601 ),
 523                                         'source' => $source->getPrefixedText()
 524                                 );
 525                         }
 526                 }
 527         }
 528
 529         /**
 530          * Get talk page IDs (if requested) and subject page IDs (if requested)
 531          * and put them in $talkids and $subjectids
 532          */
 533         private function getTSIDs() {
 534                 $getTitles = $this->talkids = $this->subjectids = array();
 535
 536                 foreach ( $this->everything as $t ) {
 537                         if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
 538                                 if ( $this->fld_subjectid ) {
 539                                         $getTitles[] = $t->getSubjectPage();
 540                                 }
 541                         } elseif ( $this->fld_talkid ) {
 542                                 $getTitles[] = $t->getTalkPage();
 543                         }
 544                 }
 545                 if ( !count( $getTitles ) ) {
 546                         return;
 547                 }
 548
 549                 $db = $this->getDB();
 550
 551                 // Construct a custom WHERE clause that matches
 552                 // all titles in $getTitles
 553                 $lb = new LinkBatch( $getTitles );
 554                 $this->resetQueryParams();
 555                 $this->addTables( 'page' );
 556                 $this->addFields( array( 'page_title', 'page_namespace', 'page_id' ) );
 557                 $this->addWhere( $lb->constructSet( 'page', $db ) );
 558                 $res = $this->select( __METHOD__ );
 559                 foreach ( $res as $row ) {
 560                         if ( MWNamespace::isTalk( $row->page_namespace ) ) {
 561                                 $this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
 562                                                 intval( $row->page_id );
 563                         } else {
 564                                 $this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
 565                                                 intval( $row->page_id );
 566                         }
 567                 }
 568         }
 569
 570         private function getDisplayTitle() {
 571                 $this->displaytitles = array();
 572
 573                 $pageIds = array_keys( $this->titles );
 574
 575                 if ( !count( $pageIds ) ) {
 576                         return;
 577                 }
 578
 579                 $this->resetQueryParams();
 580                 $this->addTables( 'page_props' );
 581                 $this->addFields( array( 'pp_page', 'pp_value' ) );
 582                 $this->addWhereFld( 'pp_page', $pageIds );
 583                 $this->addWhereFld( 'pp_propname', 'displaytitle' );
 584                 $res = $this->select( __METHOD__ );
 585
 586                 foreach ( $res as $row ) {
 587                         $this->displaytitles[$row->pp_page] = $row->pp_value;
 588                 }
 589         }
 590
 591         /**
 592          * Get information about watched status and put it in $this->watched
 593          */
 594         private function getWatchedInfo() {
 595                 global $wgUser;
 596
 597                 if ( $wgUser->isAnon() || count( $this->everything ) == 0 ) {
 598                         return;
 599                 }
 600
 601                 $this->watched = array();
 602                 $db = $this->getDB();
 603
 604                 $lb = new LinkBatch( $this->everything );
 605
 606                 $this->resetQueryParams();
 607                 $this->addTables( array( 'watchlist' ) );
 608                 $this->addFields( array( 'wl_title', 'wl_namespace' ) );
 609                 $this->addWhere( array(
 610                         $lb->constructSet( 'wl', $db ),
 611                         'wl_user' => $wgUser->getID()
 612                 ) );
 613
 614                 $res = $this->select( __METHOD__ );
 615
 616                 foreach ( $res as $row ) {
 617                         $this->watched[$row->wl_namespace][$row->wl_title] = true;
 618                 }
 619         }
 620
 621         public function getCacheMode( $params ) {
 622                 $publicProps = array(
 623                         'protection',
 624                         'talkid',
 625                         'subjectid',
 626                         'url',
 627                         'preload',
 628                         'displaytitle',
 629                 );
 630                 if ( !is_null( $params['prop'] ) ) {
 631                         foreach ( $params['prop'] as $prop ) {
 632                                 if ( !in_array( $prop, $publicProps ) ) {
 633                                         return 'private';
 634                                 }
 635                         }
 636                 }
 637                 if ( !is_null( $params['token'] ) ) {
 638                         return 'private';
 639                 }
 640                 return 'public';
 641         }
 642
 643         public function getAllowedParams() {
 644                 return array(
 645                         'prop' => array(
 646                                 ApiBase::PARAM_DFLT => null,
 647                                 ApiBase::PARAM_ISMULTI => true,
 648                                 ApiBase::PARAM_TYPE => array(
 649                                         'protection',
 650                                         'talkid',
 651                                         'watched', # private
 652                                         'subjectid',
 653                                         'url',
 654                                         'readable', # private
 655                                         'preload',
 656                                         'displaytitle',
 657                                         // If you add more properties here, please consider whether they
 658                                         // need to be added to getCacheMode()
 659                                 ) ),
 660                         'token' => array(
 661                                 ApiBase::PARAM_DFLT => null,
 662                                 ApiBase::PARAM_ISMULTI => true,
 663                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
 664                         ),
 665                         'continue' => null,
 666                 );
 667         }
 668
 669         public function getParamDescription() {
 670                 return array(
 671                         'prop' => array(
 672                                 'Which additional properties to get:',
 673                                 ' protection   - List the protection level of each page',
 674                                 ' talkid       - The page ID of the talk page for each non-talk page',
 675                                 ' watched      - List the watched status of each page',
 676                                 ' subjectid    - The page ID of the parent page for each talk page',
 677                                 ' url          - Gives a full URL to the page, and also an edit URL',
 678                                 ' readable     - Whether the user can read this page',
 679                                 ' preload      - Gives the text returned by EditFormPreloadText',
 680                                 ' displaytitle - Gives the way the page title is actually displayed',
 681                         ),
 682                         'token' => 'Request a token to perform a data-modifying action on a page',
 683                         'continue' => 'When more results are available, use this to continue',
 684                 );
 685         }
 686
 687         public function getDescription() {
 688                 return 'Get basic page information such as namespace, title, last touched date, ...';
 689         }
 690
 691         public function getPossibleErrors() {
 692                 return array_merge( parent::getPossibleErrors(), array(
 693                         array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
 694                 ) );
 695         }
 696
 697         protected function getExamples() {
 698                 return array(
 699                         'api.php?action=query&prop=info&titles=Main%20Page',
 700                         'api.php?action=query&prop=info&inprop=protection&titles=Main%20Page'
 701                 );
 702         }
 703
 704         public function getVersion() {
 705                 return __CLASS__ . ': $Id$';
 706         }
 707 }