includes/api/ApiQueryInfo.php

   1 <?php
   2
   3 /**
   4  * Created on Sep 25, 2006
   5  *
   6  * API for MediaWiki 1.8+
   7  *
   8  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License along
  21  * with this program; if not, write to the Free Software Foundation, Inc.,
  22  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  23  * http://www.gnu.org/copyleft/gpl.html
  24  */
  25
  26 if ( !defined( 'MEDIAWIKI' ) ) {
  27         // Eclipse helper - will be ignored in production
  28         require_once( 'ApiQueryBase.php' );
  29 }
  30
  31 /**
  32  * A query module to show basic page information.
  33  *
  34  * @ingroup API
  35  */
  36 class ApiQueryInfo extends ApiQueryBase {
  37
  38         private $fld_protection = false, $fld_talkid = false,
  39                 $fld_subjectid = false, $fld_url = false,
  40                 $fld_readable = false, $fld_watched = false,
  41                 $fld_preload = false;
  42
  43         public function __construct( $query, $moduleName ) {
  44                 parent::__construct( $query, $moduleName, 'in' );
  45         }
  46
  47         public function requestExtraData( $pageSet ) {
  48                 $pageSet->requestField( 'page_restrictions' );
  49                 $pageSet->requestField( 'page_is_redirect' );
  50                 $pageSet->requestField( 'page_is_new' );
  51                 $pageSet->requestField( 'page_counter' );
  52                 $pageSet->requestField( 'page_touched' );
  53                 $pageSet->requestField( 'page_latest' );
  54                 $pageSet->requestField( 'page_len' );
  55         }
  56
  57         /**
  58          * Get an array mapping token names to their handler functions.
  59          * The prototype for a token function is func($pageid, $title)
  60          * it should return a token or false (permission denied)
  61          * @return array(tokenname => function)
  62          */
  63         protected function getTokenFunctions() {
  64                 // Don't call the hooks twice
  65                 if ( isset( $this->tokenFunctions ) ) {
  66                         return $this->tokenFunctions;
  67                 }
  68
  69                 // If we're in JSON callback mode, no tokens can be obtained
  70                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  71                         return array();
  72                 }
  73
  74                 $this->tokenFunctions = array(
  75                         'edit' => array( 'ApiQueryInfo', 'getEditToken' ),
  76                         'delete' => array( 'ApiQueryInfo', 'getDeleteToken' ),
  77                         'protect' => array( 'ApiQueryInfo', 'getProtectToken' ),
  78                         'move' => array( 'ApiQueryInfo', 'getMoveToken' ),
  79                         'block' => array( 'ApiQueryInfo', 'getBlockToken' ),
  80                         'unblock' => array( 'ApiQueryInfo', 'getUnblockToken' ),
  81                         'email' => array( 'ApiQueryInfo', 'getEmailToken' ),
  82                         'import' => array( 'ApiQueryInfo', 'getImportToken' ),
  83                 );
  84                 wfRunHooks( 'APIQueryInfoTokens', array( &$this->tokenFunctions ) );
  85                 return $this->tokenFunctions;
  86         }
  87
  88         public static function getEditToken( $pageid, $title ) {
  89                 // We could check for $title->userCan('edit') here,
  90                 // but that's too expensive for this purpose
  91                 // and would break caching
  92                 global $wgUser;
  93                 if ( !$wgUser->isAllowed( 'edit' ) ) {
  94                         return false;
  95                 }
  96
  97                 // The edit token is always the same, let's exploit that
  98                 static $cachedEditToken = null;
  99                 if ( !is_null( $cachedEditToken ) ) {
 100                         return $cachedEditToken;
 101                 }
 102
 103                 $cachedEditToken = $wgUser->editToken();
 104                 return $cachedEditToken;
 105         }
 106
 107         public static function getDeleteToken( $pageid, $title ) {
 108                 global $wgUser;
 109                 if ( !$wgUser->isAllowed( 'delete' ) ) {
 110                         return false;
 111                 }
 112
 113                 static $cachedDeleteToken = null;
 114                 if ( !is_null( $cachedDeleteToken ) ) {
 115                         return $cachedDeleteToken;
 116                 }
 117
 118                 $cachedDeleteToken = $wgUser->editToken();
 119                 return $cachedDeleteToken;
 120         }
 121
 122         public static function getProtectToken( $pageid, $title ) {
 123                 global $wgUser;
 124                 if ( !$wgUser->isAllowed( 'protect' ) ) {
 125                         return false;
 126                 }
 127
 128                 static $cachedProtectToken = null;
 129                 if ( !is_null( $cachedProtectToken ) ) {
 130                         return $cachedProtectToken;
 131                 }
 132
 133                 $cachedProtectToken = $wgUser->editToken();
 134                 return $cachedProtectToken;
 135         }
 136
 137         public static function getMoveToken( $pageid, $title ) {
 138                 global $wgUser;
 139                 if ( !$wgUser->isAllowed( 'move' ) ) {
 140                         return false;
 141                 }
 142
 143                 static $cachedMoveToken = null;
 144                 if ( !is_null( $cachedMoveToken ) ) {
 145                         return $cachedMoveToken;
 146                 }
 147
 148                 $cachedMoveToken = $wgUser->editToken();
 149                 return $cachedMoveToken;
 150         }
 151
 152         public static function getBlockToken( $pageid, $title ) {
 153                 global $wgUser;
 154                 if ( !$wgUser->isAllowed( 'block' ) ) {
 155                         return false;
 156                 }
 157
 158                 static $cachedBlockToken = null;
 159                 if ( !is_null( $cachedBlockToken ) ) {
 160                         return $cachedBlockToken;
 161                 }
 162
 163                 $cachedBlockToken = $wgUser->editToken();
 164                 return $cachedBlockToken;
 165         }
 166
 167         public static function getUnblockToken( $pageid, $title ) {
 168                 // Currently, this is exactly the same as the block token
 169                 return self::getBlockToken( $pageid, $title );
 170         }
 171
 172         public static function getEmailToken( $pageid, $title ) {
 173                 global $wgUser;
 174                 if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailUser() ) {
 175                         return false;
 176                 }
 177
 178                 static $cachedEmailToken = null;
 179                 if ( !is_null( $cachedEmailToken ) ) {
 180                         return $cachedEmailToken;
 181                 }
 182
 183                 $cachedEmailToken = $wgUser->editToken();
 184                 return $cachedEmailToken;
 185         }
 186
 187         public static function getImportToken( $pageid, $title ) {
 188                 global $wgUser;
 189                 if ( !$wgUser->isAllowed( 'import' ) ) {
 190                         return false;
 191                 }
 192
 193                 static $cachedImportToken = null;
 194                 if ( !is_null( $cachedImportToken ) ) {
 195                         return $cachedImportToken;
 196                 }
 197
 198                 $cachedImportToken = $wgUser->editToken();
 199                 return $cachedImportToken;
 200         }
 201
 202         public function execute() {
 203                 $this->params = $this->extractRequestParams();
 204                 if ( !is_null( $this->params['prop'] ) ) {
 205                         $prop = array_flip( $this->params['prop'] );
 206                         $this->fld_protection = isset( $prop['protection'] );
 207                         $this->fld_watched = isset( $prop['watched'] );
 208                         $this->fld_talkid = isset( $prop['talkid'] );
 209                         $this->fld_subjectid = isset( $prop['subjectid'] );
 210                         $this->fld_url = isset( $prop['url'] );
 211                         $this->fld_readable = isset( $prop['readable'] );
 212                         $this->fld_preload = isset( $prop['preload'] );
 213                 }
 214
 215                 $pageSet = $this->getPageSet();
 216                 $this->titles = $pageSet->getGoodTitles();
 217                 $this->missing = $pageSet->getMissingTitles();
 218                 $this->everything = $this->titles + $this->missing;
 219                 $result = $this->getResult();
 220
 221                 uasort( $this->everything, array( 'Title', 'compare' ) );
 222                 if ( !is_null( $this->params['continue'] ) ) {
 223                         // Throw away any titles we're gonna skip so they don't
 224                         // clutter queries
 225                         $cont = explode( '|', $this->params['continue'] );
 226                         if ( count( $cont ) != 2 ) {
 227                                 $this->dieUsage( 'Invalid continue param. You should pass the original ' .
 228                                                 'value returned by the previous query', '_badcontinue' );
 229                         }
 230                         $conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
 231                         foreach ( $this->everything as $pageid => $title ) {
 232                                 if ( Title::compare( $title, $conttitle ) >= 0 ) {
 233                                         break;
 234                                 }
 235                                 unset( $this->titles[$pageid] );
 236                                 unset( $this->missing[$pageid] );
 237                                 unset( $this->everything[$pageid] );
 238                         }
 239                 }
 240
 241                 $this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
 242                 $this->pageIsRedir = $pageSet->getCustomField( 'page_is_redirect' );
 243                 $this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );
 244                 $this->pageCounter = $pageSet->getCustomField( 'page_counter' );
 245                 $this->pageTouched = $pageSet->getCustomField( 'page_touched' );
 246                 $this->pageLatest = $pageSet->getCustomField( 'page_latest' );
 247                 $this->pageLength = $pageSet->getCustomField( 'page_len' );
 248
 249                 $db = $this->getDB();
 250                 // Get protection info if requested
 251                 if ( $this->fld_protection ) {
 252                         $this->getProtectionInfo();
 253                 }
 254
 255                 if ( $this->fld_watched ) {
 256                         $this->getWatchedInfo();
 257                 }
 258
 259                 // Run the talkid/subjectid query if requested
 260                 if ( $this->fld_talkid || $this->fld_subjectid ) {
 261                         $this->getTSIDs();
 262                 }
 263
 264                 foreach ( $this->everything as $pageid => $title ) {
 265                         $pageInfo = $this->extractPageInfo( $pageid, $title );
 266                         $fit = $result->addValue( array(
 267                                 'query',
 268                                 'pages'
 269                         ), $pageid, $pageInfo );
 270                         if ( !$fit ) {
 271                                 $this->setContinueEnumParameter( 'continue',
 272                                                 $title->getNamespace() . '|' .
 273                                                 $title->getText() );
 274                                 break;
 275                         }
 276                 }
 277         }
 278
 279         /**
 280          * Get a result array with information about a title
 281          * @param $pageid int Page ID (negative for missing titles)
 282          * @param $title Title object
 283          * @return array
 284          */
 285         private function extractPageInfo( $pageid, $title ) {
 286                 $pageInfo = array();
 287                 if ( $title->exists() ) {
 288                         $pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
 289                         $pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
 290                         $pageInfo['counter'] = intval( $this->pageCounter[$pageid] );
 291                         $pageInfo['length'] = intval( $this->pageLength[$pageid] );
 292                         if ( $this->pageIsRedir[$pageid] ) {
 293                                 $pageInfo['redirect'] = '';
 294                         }
 295                         if ( $this->pageIsNew[$pageid] ) {
 296                                 $pageInfo['new'] = '';
 297                         }
 298                 }
 299
 300                 if ( !is_null( $this->params['token'] ) ) {
 301                         $tokenFunctions = $this->getTokenFunctions();
 302                         $pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
 303                         foreach ( $this->params['token'] as $t ) {
 304                                 $val = call_user_func( $tokenFunctions[$t], $pageid, $title );
 305                                 if ( $val === false ) {
 306                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 307                                 } else {
 308                                         $pageInfo[$t . 'token'] = $val;
 309                                 }
 310                         }
 311                 }
 312
 313                 if ( $this->fld_protection ) {
 314                         $pageInfo['protection'] = array();
 315                         if ( isset( $this->protections[$title->getNamespace()][$title->getDBkey()] ) ) {
 316                                 $pageInfo['protection'] =
 317                                         $this->protections[$title->getNamespace()][$title->getDBkey()];
 318                         }
 319                         $this->getResult()->setIndexedTagName( $pageInfo['protection'], 'pr' );
 320                 }
 321
 322                 if ( $this->fld_watched && isset( $this->watched[$title->getNamespace()][$title->getDBkey()] ) )
 323                 {
 324                         $pageInfo['watched'] = '';
 325                 }
 326
 327                 if ( $this->fld_talkid && isset( $this->talkids[$title->getNamespace()][$title->getDBkey()] ) )
 328                 {
 329                         $pageInfo['talkid'] = $this->talkids[$title->getNamespace()][$title->getDBkey()];
 330                 }
 331
 332                 if ( $this->fld_subjectid && isset( $this->subjectids[$title->getNamespace()][$title->getDBkey()] ) )
 333                 {
 334                         $pageInfo['subjectid'] = $this->subjectids[$title->getNamespace()][$title->getDBkey()];
 335                 }
 336
 337                 if ( $this->fld_url ) {
 338                         $pageInfo['fullurl'] = $title->getFullURL();
 339                         $pageInfo['editurl'] = $title->getFullURL( 'action=edit' );
 340                 }
 341                 if ( $this->fld_readable && $title->userCanRead() ) {
 342                         $pageInfo['readable'] = '';
 343                 }
 344
 345                 if ( $this->fld_preload ) {
 346                         if ( $title->exists() ) {
 347                                 $pageInfo['preload'] = '';
 348                         } else {
 349                                 wfRunHooks( 'EditFormPreloadText', array( &$text, &$title ) );
 350
 351                                 $pageInfo['preload'] = $text;
 352                         }
 353                 }
 354                 return $pageInfo;
 355         }
 356
 357         /**
 358          * Get information about protections and put it in $protections
 359          */
 360         private function getProtectionInfo() {
 361                 $this->protections = array();
 362                 $db = $this->getDB();
 363
 364                 // Get normal protections for existing titles
 365                 if ( count( $this->titles ) ) {
 366                         $this->resetQueryParams();
 367                         $this->addTables( array( 'page_restrictions', 'page' ) );
 368                         $this->addWhere( 'page_id=pr_page' );
 369                         $this->addFields( array( 'pr_page', 'pr_type', 'pr_level',
 370                                         'pr_expiry', 'pr_cascade', 'page_namespace',
 371                                         'page_title' ) );
 372                         $this->addWhereFld( 'pr_page', array_keys( $this->titles ) );
 373
 374                         $res = $this->select( __METHOD__ );
 375                         while ( $row = $db->fetchObject( $res ) ) {
 376                                 $a = array(
 377                                         'type' => $row->pr_type,
 378                                         'level' => $row->pr_level,
 379                                         'expiry' => Block::decodeExpiry( $row->pr_expiry, TS_ISO_8601 )
 380                                 );
 381                                 if ( $row->pr_cascade ) {
 382                                         $a['cascade'] = '';
 383                                 }
 384                                 $this->protections[$row->page_namespace][$row->page_title][] = $a;
 385
 386                                 // Also check old restrictions
 387                                 if ( $this->pageRestrictions[$row->pr_page] ) {
 388                                         $restrictions = explode( ':', trim( $this->pageRestrictions[$row->pr_page] ) );
 389                                         foreach ( $restrictions as $restrict ) {
 390                                                 $temp = explode( '=', trim( $restrict ) );
 391                                                 if ( count( $temp ) == 1 ) {
 392                                                         // old old format should be treated as edit/move restriction
 393                                                         $restriction = trim( $temp[0] );
 394
 395                                                         if ( $restriction == '' ) {
 396                                                                 continue;
 397                                                         }
 398                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 399                                                                 'type' => 'edit',
 400                                                                 'level' => $restriction,
 401                                                                 'expiry' => 'infinity',
 402                                                         );
 403                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 404                                                                 'type' => 'move',
 405                                                                 'level' => $restriction,
 406                                                                 'expiry' => 'infinity',
 407                                                         );
 408                                                 } else {
 409                                                         $restriction = trim( $temp[1] );
 410                                                         if ( $restriction == '' ) {
 411                                                                 continue;
 412                                                         }
 413                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 414                                                                 'type' => $temp[0],
 415                                                                 'level' => $restriction,
 416                                                                 'expiry' => 'infinity',
 417                                                         );
 418                                                 }
 419                                         }
 420                                 }
 421                         }
 422                         $db->freeResult( $res );
 423                 }
 424
 425                 // Get protections for missing titles
 426                 if ( count( $this->missing ) ) {
 427                         $this->resetQueryParams();
 428                         $lb = new LinkBatch( $this->missing );
 429                         $this->addTables( 'protected_titles' );
 430                         $this->addFields( array( 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ) );
 431                         $this->addWhere( $lb->constructSet( 'pt', $db ) );
 432                         $res = $this->select( __METHOD__ );
 433                         while ( $row = $db->fetchObject( $res ) ) {
 434                                 $this->protections[$row->pt_namespace][$row->pt_title][] = array(
 435                                         'type' => 'create',
 436                                         'level' => $row->pt_create_perm,
 437                                         'expiry' => Block::decodeExpiry( $row->pt_expiry, TS_ISO_8601 )
 438                                 );
 439                         }
 440                         $db->freeResult( $res );
 441                 }
 442
 443                 // Cascading protections
 444                 $images = $others = array();
 445                 foreach ( $this->everything as $title )
 446                         if ( $title->getNamespace() == NS_FILE ) {
 447                                 $images[] = $title->getDBkey();
 448                         } else {
 449                                 $others[] = $title;
 450                         }
 451
 452                 if ( count( $others ) ) {
 453                         // Non-images: check templatelinks
 454                         $lb = new LinkBatch( $others );
 455                         $this->resetQueryParams();
 456                         $this->addTables( array( 'page_restrictions', 'page', 'templatelinks' ) );
 457                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 458                                         'page_title', 'page_namespace',
 459                                         'tl_title', 'tl_namespace' ) );
 460                         $this->addWhere( $lb->constructSet( 'tl', $db ) );
 461                         $this->addWhere( 'pr_page = page_id' );
 462                         $this->addWhere( 'pr_page = tl_from' );
 463                         $this->addWhereFld( 'pr_cascade', 1 );
 464
 465                         $res = $this->select( __METHOD__ );
 466                         while ( $row = $db->fetchObject( $res ) ) {
 467                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 468                                 $this->protections[$row->tl_namespace][$row->tl_title][] = array(
 469                                         'type' => $row->pr_type,
 470                                         'level' => $row->pr_level,
 471                                         'expiry' => Block::decodeExpiry( $row->pr_expiry, TS_ISO_8601 ),
 472                                         'source' => $source->getPrefixedText()
 473                                 );
 474                         }
 475                         $db->freeResult( $res );
 476                 }
 477
 478                 if ( count( $images ) ) {
 479                         // Images: check imagelinks
 480                         $this->resetQueryParams();
 481                         $this->addTables( array( 'page_restrictions', 'page', 'imagelinks' ) );
 482                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 483                                         'page_title', 'page_namespace', 'il_to' ) );
 484                         $this->addWhere( 'pr_page = page_id' );
 485                         $this->addWhere( 'pr_page = il_from' );
 486                         $this->addWhereFld( 'pr_cascade', 1 );
 487                         $this->addWhereFld( 'il_to', $images );
 488
 489                         $res = $this->select( __METHOD__ );
 490                         while ( $row = $db->fetchObject( $res ) ) {
 491                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 492                                 $this->protections[NS_FILE][$row->il_to][] = array(
 493                                         'type' => $row->pr_type,
 494                                         'level' => $row->pr_level,
 495                                         'expiry' => Block::decodeExpiry( $row->pr_expiry, TS_ISO_8601 ),
 496                                         'source' => $source->getPrefixedText()
 497                                 );
 498                         }
 499                         $db->freeResult( $res );
 500                 }
 501         }
 502
 503         /**
 504          * Get talk page IDs (if requested) and subject page IDs (if requested)
 505          * and put them in $talkids and $subjectids
 506          */
 507         private function getTSIDs() {
 508                 $getTitles = $this->talkids = $this->subjectids = array();
 509                 $db = $this->getDB();
 510                 foreach ( $this->everything as $t ) {
 511                         if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
 512                                 if ( $this->fld_subjectid ) {
 513                                         $getTitles[] = $t->getSubjectPage();
 514                                 }
 515                         } elseif ( $this->fld_talkid ) {
 516                                 $getTitles[] = $t->getTalkPage();
 517                         }
 518                 }
 519                 if ( !count( $getTitles ) ) {
 520                         return;
 521                 }
 522
 523                 // Construct a custom WHERE clause that matches
 524                 // all titles in $getTitles
 525                 $lb = new LinkBatch( $getTitles );
 526                 $this->resetQueryParams();
 527                 $this->addTables( 'page' );
 528                 $this->addFields( array( 'page_title', 'page_namespace', 'page_id' ) );
 529                 $this->addWhere( $lb->constructSet( 'page', $db ) );
 530                 $res = $this->select( __METHOD__ );
 531                 while ( $row = $db->fetchObject( $res ) ) {
 532                         if ( MWNamespace::isTalk( $row->page_namespace ) ) {
 533                                 $this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
 534                                                 intval( $row->page_id );
 535                         } else {
 536                                 $this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
 537                                                 intval( $row->page_id );
 538                         }
 539                 }
 540         }
 541
 542         /**
 543          * Get information about watched status and put it in $watched
 544          */
 545         private function getWatchedInfo() {
 546                 global $wgUser;
 547
 548                 if ( $wgUser->isAnon() || count( $this->titles ) == 0 ) {
 549                         return;
 550                 }
 551
 552                 $this->watched = array();
 553                 $db = $this->getDB();
 554
 555                 $lb = new LinkBatch( $this->titles );
 556
 557                 $this->resetQueryParams();
 558                 $this->addTables( array( 'page', 'watchlist' ) );
 559                 $this->addFields( array( 'page_title', 'page_namespace' ) );
 560                 $this->addWhere( array(
 561                         $lb->constructSet( 'page', $db ),
 562                         'wl_namespace=page_namespace',
 563                         'wl_title=page_title',
 564                         'wl_user' => $wgUser->getID()
 565                 ) );
 566
 567                 $res = $this->select( __METHOD__ );
 568
 569                 while ( $row = $db->fetchObject( $res ) ) {
 570                         $this->watched[$row->page_namespace][$row->page_title] = true;
 571                 }
 572         }
 573
 574         public function getAllowedParams() {
 575                 return array(
 576                         'prop' => array(
 577                                 ApiBase::PARAM_DFLT => null,
 578                                 ApiBase::PARAM_ISMULTI => true,
 579                                 ApiBase::PARAM_TYPE => array(
 580                                         'protection',
 581                                         'talkid',
 582                                         'watched',
 583                                         'subjectid',
 584                                         'url',
 585                                         'readable',
 586                                         'preload'
 587                                 ) ),
 588                         'token' => array(
 589                                 ApiBase::PARAM_DFLT => null,
 590                                 ApiBase::PARAM_ISMULTI => true,
 591                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
 592                         ),
 593                         'continue' => null,
 594                 );
 595         }
 596
 597         public function getParamDescription() {
 598                 return array(
 599                         'prop' => array(
 600                                 'Which additional properties to get:',
 601                                 ' protection   - List the protection level of each page',
 602                                 ' talkid       - The page ID of the talk page for each non-talk page',
 603                                 ' watched      - List the watched status of each page',
 604                                 ' subjectid    - The page ID of the parent page for each talk page',
 605                                 ' url          - Gives a full URL to the page, and also an edit URL',
 606                                 ' readable     - Whether the user can read this page',
 607                                 ' preload      - Gives the text returned by EditFormPreloadText'
 608                         ),
 609                         'token' => 'Request a token to perform a data-modifying action on a page',
 610                         'continue' => 'When more results are available, use this to continue',
 611                 );
 612         }
 613
 614         public function getDescription() {
 615                 return 'Get basic page information such as namespace, title, last touched date, ...';
 616         }
 617
 618         public function getPossibleErrors() {
 619                 return array_merge( parent::getPossibleErrors(), array(
 620                         array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
 621                 ) );
 622         }
 623
 624         protected function getExamples() {
 625                 return array(
 626                         'api.php?action=query&prop=info&titles=Main%20Page',
 627                         'api.php?action=query&prop=info&inprop=protection&titles=Main%20Page'
 628                 );
 629         }
 630
 631         public function getVersion() {
 632                 return __CLASS__ . ': $Id$';
 633         }
 634 }