includes/api/ApiQueryInfo.php

   1 <?php
   2 /**
   3  *
   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 /**
  28  * A query module to show basic page information.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryInfo extends ApiQueryBase {
  33
  34         private $fld_protection = false, $fld_talkid = false,
  35                 $fld_subjectid = false, $fld_url = false,
  36                 $fld_readable = false, $fld_watched = false,
  37                 $fld_preload = false, $fld_displaytitle = false;
  38
  39         private $params, $titles, $missing, $everything, $pageCounter;
  40
  41         private $pageRestrictions, $pageIsRedir, $pageIsNew, $pageTouched,
  42                 $pageLatest, $pageLength;
  43
  44         private $protections, $watched, $talkids, $subjectids, $displaytitles;
  45
  46         private $tokenFunctions;
  47
  48         public function __construct( $query, $moduleName ) {
  49                 parent::__construct( $query, $moduleName, 'in' );
  50         }
  51
  52         /**
  53          * @param $pageSet ApiPageSet
  54          * @return void
  55          */
  56         public function requestExtraData( $pageSet ) {
  57                 global $wgDisableCounters;
  58
  59                 $pageSet->requestField( 'page_restrictions' );
  60                 $pageSet->requestField( 'page_is_redirect' );
  61                 $pageSet->requestField( 'page_is_new' );
  62                 if ( !$wgDisableCounters ) {
  63                         $pageSet->requestField( 'page_counter' );
  64                 }
  65                 $pageSet->requestField( 'page_touched' );
  66                 $pageSet->requestField( 'page_latest' );
  67                 $pageSet->requestField( 'page_len' );
  68         }
  69
  70         /**
  71          * Get an array mapping token names to their handler functions.
  72          * The prototype for a token function is func($pageid, $title)
  73          * it should return a token or false (permission denied)
  74          * @return array array(tokenname => function)
  75          */
  76         protected function getTokenFunctions() {
  77                 // Don't call the hooks twice
  78                 if ( isset( $this->tokenFunctions ) ) {
  79                         return $this->tokenFunctions;
  80                 }
  81
  82                 // If we're in JSON callback mode, no tokens can be obtained
  83                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  84                         return array();
  85                 }
  86
  87                 $this->tokenFunctions = array(
  88                         'edit' => array( 'ApiQueryInfo', 'getEditToken' ),
  89                         'delete' => array( 'ApiQueryInfo', 'getDeleteToken' ),
  90                         'protect' => array( 'ApiQueryInfo', 'getProtectToken' ),
  91                         'move' => array( 'ApiQueryInfo', 'getMoveToken' ),
  92                         'block' => array( 'ApiQueryInfo', 'getBlockToken' ),
  93                         'unblock' => array( 'ApiQueryInfo', 'getUnblockToken' ),
  94                         'email' => array( 'ApiQueryInfo', 'getEmailToken' ),
  95                         'import' => array( 'ApiQueryInfo', 'getImportToken' ),
  96                         'watch' => array( 'ApiQueryInfo', 'getWatchToken'),
  97                 );
  98                 wfRunHooks( 'APIQueryInfoTokens', array( &$this->tokenFunctions ) );
  99                 return $this->tokenFunctions;
 100         }
 101
 102         static $cachedTokens = array();
 103
 104         public static function resetTokenCache() {
 105                 ApiQueryInfo::$cachedTokens = array();
 106         }
 107
 108         public static function getEditToken( $pageid, $title ) {
 109                 // We could check for $title->userCan('edit') here,
 110                 // but that's too expensive for this purpose
 111                 // and would break caching
 112                 global $wgUser;
 113                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 114                         return false;
 115                 }
 116
 117                 // The token is always the same, let's exploit that
 118                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'edit' ] ) ) {
 119                         ApiQueryInfo::$cachedTokens[ 'edit' ] = $wgUser->getEditToken();
 120                 }
 121
 122                 return ApiQueryInfo::$cachedTokens[ 'edit' ];
 123         }
 124
 125         public static function getDeleteToken( $pageid, $title ) {
 126                 global $wgUser;
 127                 if ( !$wgUser->isAllowed( 'delete' ) ) {
 128                         return false;
 129                 }
 130
 131                 // The token is always the same, let's exploit that
 132                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'delete' ] ) ) {
 133                         ApiQueryInfo::$cachedTokens[ 'delete' ] = $wgUser->getEditToken();
 134                 }
 135
 136                 return ApiQueryInfo::$cachedTokens[ 'delete' ];
 137         }
 138
 139         public static function getProtectToken( $pageid, $title ) {
 140                 global $wgUser;
 141                 if ( !$wgUser->isAllowed( 'protect' ) ) {
 142                         return false;
 143                 }
 144
 145                 // The token is always the same, let's exploit that
 146                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'protect' ] ) ) {
 147                         ApiQueryInfo::$cachedTokens[ 'protect' ] = $wgUser->getEditToken();
 148                 }
 149
 150                 return ApiQueryInfo::$cachedTokens[ 'protect' ];
 151         }
 152
 153         public static function getMoveToken( $pageid, $title ) {
 154                 global $wgUser;
 155                 if ( !$wgUser->isAllowed( 'move' ) ) {
 156                         return false;
 157                 }
 158
 159                 // The token is always the same, let's exploit that
 160                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'move' ] ) ) {
 161                         ApiQueryInfo::$cachedTokens[ 'move' ] = $wgUser->getEditToken();
 162                 }
 163
 164                 return ApiQueryInfo::$cachedTokens[ 'move' ];
 165         }
 166
 167         public static function getBlockToken( $pageid, $title ) {
 168                 global $wgUser;
 169                 if ( !$wgUser->isAllowed( 'block' ) ) {
 170                         return false;
 171                 }
 172
 173                 // The token is always the same, let's exploit that
 174                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'block' ] ) ) {
 175                         ApiQueryInfo::$cachedTokens[ 'block' ] = $wgUser->getEditToken();
 176                 }
 177
 178                 return ApiQueryInfo::$cachedTokens[ 'block' ];
 179         }
 180
 181         public static function getUnblockToken( $pageid, $title ) {
 182                 // Currently, this is exactly the same as the block token
 183                 return self::getBlockToken( $pageid, $title );
 184         }
 185
 186         public static function getEmailToken( $pageid, $title ) {
 187                 global $wgUser;
 188                 if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailUser() ) {
 189                         return false;
 190                 }
 191
 192                 // The token is always the same, let's exploit that
 193                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'email' ] ) ) {
 194                         ApiQueryInfo::$cachedTokens[ 'email' ] = $wgUser->getEditToken();
 195                 }
 196
 197                 return ApiQueryInfo::$cachedTokens[ 'email' ];
 198         }
 199
 200         public static function getImportToken( $pageid, $title ) {
 201                 global $wgUser;
 202                 if ( !$wgUser->isAllowedAny( 'import', 'importupload' ) ) {
 203                         return false;
 204                 }
 205
 206                 // The token is always the same, let's exploit that
 207                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'import' ] ) ) {
 208                         ApiQueryInfo::$cachedTokens[ 'import' ] = $wgUser->getEditToken();
 209                 }
 210
 211                 return ApiQueryInfo::$cachedTokens[ 'import' ];
 212         }
 213
 214         public static function getWatchToken( $pageid, $title ) {
 215                 global $wgUser;
 216                 if ( !$wgUser->isLoggedIn() ) {
 217                         return false;
 218                 }
 219
 220                 // The token is always the same, let's exploit that
 221                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'watch' ] ) ) {
 222                         ApiQueryInfo::$cachedTokens[ 'watch' ] = $wgUser->getEditToken( 'watch' );
 223                 }
 224
 225                 return ApiQueryInfo::$cachedTokens[ 'watch' ];
 226         }
 227
 228         public static function getOptionsToken( $pageid, $title ) {
 229                 global $wgUser;
 230                 if ( !$wgUser->isLoggedIn() ) {
 231                         return false;
 232                 }
 233
 234                 // The token is always the same, let's exploit that
 235                 if ( !isset( ApiQueryInfo::$cachedTokens[ 'options' ] ) ) {
 236                         ApiQueryInfo::$cachedTokens[ 'options' ] = $wgUser->getEditToken();
 237                 }
 238
 239                 return ApiQueryInfo::$cachedTokens[ 'options' ];
 240         }
 241
 242         public function execute() {
 243                 $this->params = $this->extractRequestParams();
 244                 if ( !is_null( $this->params['prop'] ) ) {
 245                         $prop = array_flip( $this->params['prop'] );
 246                         $this->fld_protection = isset( $prop['protection'] );
 247                         $this->fld_watched = isset( $prop['watched'] );
 248                         $this->fld_talkid = isset( $prop['talkid'] );
 249                         $this->fld_subjectid = isset( $prop['subjectid'] );
 250                         $this->fld_url = isset( $prop['url'] );
 251                         $this->fld_readable = isset( $prop['readable'] );
 252                         $this->fld_preload = isset( $prop['preload'] );
 253                         $this->fld_displaytitle = isset( $prop['displaytitle'] );
 254                 }
 255
 256                 $pageSet = $this->getPageSet();
 257                 $this->titles = $pageSet->getGoodTitles();
 258                 $this->missing = $pageSet->getMissingTitles();
 259                 $this->everything = $this->titles + $this->missing;
 260                 $result = $this->getResult();
 261
 262                 uasort( $this->everything, array( 'Title', 'compare' ) );
 263                 if ( !is_null( $this->params['continue'] ) ) {
 264                         // Throw away any titles we're gonna skip so they don't
 265                         // clutter queries
 266                         $cont = explode( '|', $this->params['continue'] );
 267                         if ( count( $cont ) != 2 ) {
 268                                 $this->dieUsage( 'Invalid continue param. You should pass the original ' .
 269                                                 'value returned by the previous query', '_badcontinue' );
 270                         }
 271                         $conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
 272                         foreach ( $this->everything as $pageid => $title ) {
 273                                 if ( Title::compare( $title, $conttitle ) >= 0 ) {
 274                                         break;
 275                                 }
 276                                 unset( $this->titles[$pageid] );
 277                                 unset( $this->missing[$pageid] );
 278                                 unset( $this->everything[$pageid] );
 279                         }
 280                 }
 281
 282                 $this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
 283                 $this->pageIsRedir = $pageSet->getCustomField( 'page_is_redirect' );
 284                 $this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );
 285
 286                 global $wgDisableCounters;
 287
 288                 if ( !$wgDisableCounters ) {
 289                         $this->pageCounter = $pageSet->getCustomField( 'page_counter' );
 290                 }
 291                 $this->pageTouched = $pageSet->getCustomField( 'page_touched' );
 292                 $this->pageLatest = $pageSet->getCustomField( 'page_latest' );
 293                 $this->pageLength = $pageSet->getCustomField( 'page_len' );
 294
 295                 // Get protection info if requested
 296                 if ( $this->fld_protection ) {
 297                         $this->getProtectionInfo();
 298                 }
 299
 300                 if ( $this->fld_watched ) {
 301                         $this->getWatchedInfo();
 302                 }
 303
 304                 // Run the talkid/subjectid query if requested
 305                 if ( $this->fld_talkid || $this->fld_subjectid ) {
 306                         $this->getTSIDs();
 307                 }
 308
 309                 if ( $this->fld_displaytitle ) {
 310                         $this->getDisplayTitle();
 311                 }
 312
 313                 foreach ( $this->everything as $pageid => $title ) {
 314                         $pageInfo = $this->extractPageInfo( $pageid, $title );
 315                         $fit = $result->addValue( array(
 316                                 'query',
 317                                 'pages'
 318                         ), $pageid, $pageInfo );
 319                         if ( !$fit ) {
 320                                 $this->setContinueEnumParameter( 'continue',
 321                                                 $title->getNamespace() . '|' .
 322                                                 $title->getText() );
 323                                 break;
 324                         }
 325                 }
 326         }
 327
 328         /**
 329          * Get a result array with information about a title
 330          * @param $pageid int Page ID (negative for missing titles)
 331          * @param $title Title object
 332          * @return array
 333          */
 334         private function extractPageInfo( $pageid, $title ) {
 335                 $pageInfo = array();
 336                 $titleExists = $pageid > 0; //$title->exists() needs pageid, which is not set for all title objects
 337                 $ns = $title->getNamespace();
 338                 $dbkey = $title->getDBkey();
 339                 if ( $titleExists ) {
 340                         global $wgDisableCounters;
 341
 342                         $pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
 343                         $pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
 344                         $pageInfo['counter'] = $wgDisableCounters
 345                                 ? ""
 346                                 : intval( $this->pageCounter[$pageid] );
 347                         $pageInfo['length'] = intval( $this->pageLength[$pageid] );
 348
 349                         if ( $this->pageIsRedir[$pageid] ) {
 350                                 $pageInfo['redirect'] = '';
 351                         }
 352                         if ( $this->pageIsNew[$pageid] ) {
 353                                 $pageInfo['new'] = '';
 354                         }
 355                 }
 356
 357                 if ( !is_null( $this->params['token'] ) ) {
 358                         $tokenFunctions = $this->getTokenFunctions();
 359                         $pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
 360                         foreach ( $this->params['token'] as $t ) {
 361                                 $val = call_user_func( $tokenFunctions[$t], $pageid, $title );
 362                                 if ( $val === false ) {
 363                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 364                                 } else {
 365                                         $pageInfo[$t . 'token'] = $val;
 366                                 }
 367                         }
 368                 }
 369
 370                 if ( $this->fld_protection ) {
 371                         $pageInfo['protection'] = array();
 372                         if ( isset( $this->protections[$ns][$dbkey] ) ) {
 373                                 $pageInfo['protection'] =
 374                                         $this->protections[$ns][$dbkey];
 375                         }
 376                         $this->getResult()->setIndexedTagName( $pageInfo['protection'], 'pr' );
 377                 }
 378
 379                 if ( $this->fld_watched && isset( $this->watched[$ns][$dbkey] ) ) {
 380                         $pageInfo['watched'] = '';
 381                 }
 382
 383                 if ( $this->fld_talkid && isset( $this->talkids[$ns][$dbkey] ) )        {
 384                         $pageInfo['talkid'] = $this->talkids[$ns][$dbkey];
 385                 }
 386
 387                 if ( $this->fld_subjectid && isset( $this->subjectids[$ns][$dbkey] ) ) {
 388                         $pageInfo['subjectid'] = $this->subjectids[$ns][$dbkey];
 389                 }
 390
 391                 if ( $this->fld_url ) {
 392                         $pageInfo['fullurl'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 393                         $pageInfo['editurl'] = wfExpandUrl( $title->getFullURL( 'action=edit' ), PROTO_CURRENT );
 394                 }
 395                 if ( $this->fld_readable && $title->userCan( 'read' ) ) {
 396                         $pageInfo['readable'] = '';
 397                 }
 398
 399                 if ( $this->fld_preload ) {
 400                         if ( $titleExists ) {
 401                                 $pageInfo['preload'] = '';
 402                         } else {
 403                                 $text = null;
 404                                 wfRunHooks( 'EditFormPreloadText', array( &$text, &$title ) );
 405
 406                                 $pageInfo['preload'] = $text;
 407                         }
 408                 }
 409
 410                 if ( $this->fld_displaytitle ) {
 411                         if ( isset( $this->displaytitles[$pageid] ) ) {
 412                                 $pageInfo['displaytitle'] = $this->displaytitles[$pageid];
 413                         } else {
 414                                 $pageInfo['displaytitle'] = $title->getPrefixedText();
 415                         }
 416                 }
 417
 418                 return $pageInfo;
 419         }
 420
 421         /**
 422          * Get information about protections and put it in $protections
 423          */
 424         private function getProtectionInfo() {
 425                 global $wgContLang;
 426                 $this->protections = array();
 427                 $db = $this->getDB();
 428
 429                 // Get normal protections for existing titles
 430                 if ( count( $this->titles ) ) {
 431                         $this->resetQueryParams();
 432                         $this->addTables( array( 'page_restrictions', 'page' ) );
 433                         $this->addWhere( 'page_id=pr_page' );
 434                         $this->addFields( array( 'pr_page', 'pr_type', 'pr_level',
 435                                         'pr_expiry', 'pr_cascade', 'page_namespace',
 436                                         'page_title' ) );
 437                         $this->addWhereFld( 'pr_page', array_keys( $this->titles ) );
 438
 439                         $res = $this->select( __METHOD__ );
 440                         foreach ( $res as $row ) {
 441                                 $a = array(
 442                                         'type' => $row->pr_type,
 443                                         'level' => $row->pr_level,
 444                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 )
 445                                 );
 446                                 if ( $row->pr_cascade ) {
 447                                         $a['cascade'] = '';
 448                                 }
 449                                 $this->protections[$row->page_namespace][$row->page_title][] = $a;
 450
 451                                 // Also check old restrictions
 452                                 if ( $this->pageRestrictions[$row->pr_page] ) {
 453                                         $restrictions = explode( ':', trim( $this->pageRestrictions[$row->pr_page] ) );
 454                                         foreach ( $restrictions as $restrict ) {
 455                                                 $temp = explode( '=', trim( $restrict ) );
 456                                                 if ( count( $temp ) == 1 ) {
 457                                                         // old old format should be treated as edit/move restriction
 458                                                         $restriction = trim( $temp[0] );
 459
 460                                                         if ( $restriction == '' ) {
 461                                                                 continue;
 462                                                         }
 463                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 464                                                                 'type' => 'edit',
 465                                                                 'level' => $restriction,
 466                                                                 'expiry' => 'infinity',
 467                                                         );
 468                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 469                                                                 'type' => 'move',
 470                                                                 'level' => $restriction,
 471                                                                 'expiry' => 'infinity',
 472                                                         );
 473                                                 } else {
 474                                                         $restriction = trim( $temp[1] );
 475                                                         if ( $restriction == '' ) {
 476                                                                 continue;
 477                                                         }
 478                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 479                                                                 'type' => $temp[0],
 480                                                                 'level' => $restriction,
 481                                                                 'expiry' => 'infinity',
 482                                                         );
 483                                                 }
 484                                         }
 485                                 }
 486                         }
 487                 }
 488
 489                 // Get protections for missing titles
 490                 if ( count( $this->missing ) ) {
 491                         $this->resetQueryParams();
 492                         $lb = new LinkBatch( $this->missing );
 493                         $this->addTables( 'protected_titles' );
 494                         $this->addFields( array( 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ) );
 495                         $this->addWhere( $lb->constructSet( 'pt', $db ) );
 496                         $res = $this->select( __METHOD__ );
 497                         foreach ( $res as $row ) {
 498                                 $this->protections[$row->pt_namespace][$row->pt_title][] = array(
 499                                         'type' => 'create',
 500                                         'level' => $row->pt_create_perm,
 501                                         'expiry' => $wgContLang->formatExpiry( $row->pt_expiry, TS_ISO_8601 )
 502                                 );
 503                         }
 504                 }
 505
 506                 // Cascading protections
 507                 $images = $others = array();
 508                 foreach ( $this->everything as $title ) {
 509                         if ( $title->getNamespace() == NS_FILE ) {
 510                                 $images[] = $title->getDBkey();
 511                         } else {
 512                                 $others[] = $title;
 513                         }
 514                 }
 515
 516                 if ( count( $others ) ) {
 517                         // Non-images: check templatelinks
 518                         $lb = new LinkBatch( $others );
 519                         $this->resetQueryParams();
 520                         $this->addTables( array( 'page_restrictions', 'page', 'templatelinks' ) );
 521                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 522                                         'page_title', 'page_namespace',
 523                                         'tl_title', 'tl_namespace' ) );
 524                         $this->addWhere( $lb->constructSet( 'tl', $db ) );
 525                         $this->addWhere( 'pr_page = page_id' );
 526                         $this->addWhere( 'pr_page = tl_from' );
 527                         $this->addWhereFld( 'pr_cascade', 1 );
 528
 529                         $res = $this->select( __METHOD__ );
 530                         foreach ( $res as $row ) {
 531                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 532                                 $this->protections[$row->tl_namespace][$row->tl_title][] = array(
 533                                         'type' => $row->pr_type,
 534                                         'level' => $row->pr_level,
 535                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 536                                         'source' => $source->getPrefixedText()
 537                                 );
 538                         }
 539                 }
 540
 541                 if ( count( $images ) ) {
 542                         // Images: check imagelinks
 543                         $this->resetQueryParams();
 544                         $this->addTables( array( 'page_restrictions', 'page', 'imagelinks' ) );
 545                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 546                                         'page_title', 'page_namespace', 'il_to' ) );
 547                         $this->addWhere( 'pr_page = page_id' );
 548                         $this->addWhere( 'pr_page = il_from' );
 549                         $this->addWhereFld( 'pr_cascade', 1 );
 550                         $this->addWhereFld( 'il_to', $images );
 551
 552                         $res = $this->select( __METHOD__ );
 553                         foreach ( $res as $row ) {
 554                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 555                                 $this->protections[NS_FILE][$row->il_to][] = array(
 556                                         'type' => $row->pr_type,
 557                                         'level' => $row->pr_level,
 558                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 559                                         'source' => $source->getPrefixedText()
 560                                 );
 561                         }
 562                 }
 563         }
 564
 565         /**
 566          * Get talk page IDs (if requested) and subject page IDs (if requested)
 567          * and put them in $talkids and $subjectids
 568          */
 569         private function getTSIDs() {
 570                 $getTitles = $this->talkids = $this->subjectids = array();
 571
 572                 foreach ( $this->everything as $t ) {
 573                         if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
 574                                 if ( $this->fld_subjectid ) {
 575                                         $getTitles[] = $t->getSubjectPage();
 576                                 }
 577                         } elseif ( $this->fld_talkid ) {
 578                                 $getTitles[] = $t->getTalkPage();
 579                         }
 580                 }
 581                 if ( !count( $getTitles ) ) {
 582                         return;
 583                 }
 584
 585                 $db = $this->getDB();
 586
 587                 // Construct a custom WHERE clause that matches
 588                 // all titles in $getTitles
 589                 $lb = new LinkBatch( $getTitles );
 590                 $this->resetQueryParams();
 591                 $this->addTables( 'page' );
 592                 $this->addFields( array( 'page_title', 'page_namespace', 'page_id' ) );
 593                 $this->addWhere( $lb->constructSet( 'page', $db ) );
 594                 $res = $this->select( __METHOD__ );
 595                 foreach ( $res as $row ) {
 596                         if ( MWNamespace::isTalk( $row->page_namespace ) ) {
 597                                 $this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
 598                                                 intval( $row->page_id );
 599                         } else {
 600                                 $this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
 601                                                 intval( $row->page_id );
 602                         }
 603                 }
 604         }
 605
 606         private function getDisplayTitle() {
 607                 $this->displaytitles = array();
 608
 609                 $pageIds = array_keys( $this->titles );
 610
 611                 if ( !count( $pageIds ) ) {
 612                         return;
 613                 }
 614
 615                 $this->resetQueryParams();
 616                 $this->addTables( 'page_props' );
 617                 $this->addFields( array( 'pp_page', 'pp_value' ) );
 618                 $this->addWhereFld( 'pp_page', $pageIds );
 619                 $this->addWhereFld( 'pp_propname', 'displaytitle' );
 620                 $res = $this->select( __METHOD__ );
 621
 622                 foreach ( $res as $row ) {
 623                         $this->displaytitles[$row->pp_page] = $row->pp_value;
 624                 }
 625         }
 626
 627         /**
 628          * Get information about watched status and put it in $this->watched
 629          */
 630         private function getWatchedInfo() {
 631                 $user = $this->getUser();
 632
 633                 if ( $user->isAnon() || count( $this->everything ) == 0 ) {
 634                         return;
 635                 }
 636
 637                 $this->watched = array();
 638                 $db = $this->getDB();
 639
 640                 $lb = new LinkBatch( $this->everything );
 641
 642                 $this->resetQueryParams();
 643                 $this->addTables( array( 'watchlist' ) );
 644                 $this->addFields( array( 'wl_title', 'wl_namespace' ) );
 645                 $this->addWhere( array(
 646                         $lb->constructSet( 'wl', $db ),
 647                         'wl_user' => $user->getID()
 648                 ) );
 649
 650                 $res = $this->select( __METHOD__ );
 651
 652                 foreach ( $res as $row ) {
 653                         $this->watched[$row->wl_namespace][$row->wl_title] = true;
 654                 }
 655         }
 656
 657         public function getCacheMode( $params ) {
 658                 $publicProps = array(
 659                         'protection',
 660                         'talkid',
 661                         'subjectid',
 662                         'url',
 663                         'preload',
 664                         'displaytitle',
 665                 );
 666                 if ( !is_null( $params['prop'] ) ) {
 667                         foreach ( $params['prop'] as $prop ) {
 668                                 if ( !in_array( $prop, $publicProps ) ) {
 669                                         return 'private';
 670                                 }
 671                         }
 672                 }
 673                 if ( !is_null( $params['token'] ) ) {
 674                         return 'private';
 675                 }
 676                 return 'public';
 677         }
 678
 679         public function getAllowedParams() {
 680                 return array(
 681                         'prop' => array(
 682                                 ApiBase::PARAM_DFLT => null,
 683                                 ApiBase::PARAM_ISMULTI => true,
 684                                 ApiBase::PARAM_TYPE => array(
 685                                         'protection',
 686                                         'talkid',
 687                                         'watched', # private
 688                                         'subjectid',
 689                                         'url',
 690                                         'readable', # private
 691                                         'preload',
 692                                         'displaytitle',
 693                                         // If you add more properties here, please consider whether they
 694                                         // need to be added to getCacheMode()
 695                                 ) ),
 696                         'token' => array(
 697                                 ApiBase::PARAM_DFLT => null,
 698                                 ApiBase::PARAM_ISMULTI => true,
 699                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
 700                         ),
 701                         'continue' => null,
 702                 );
 703         }
 704
 705         public function getParamDescription() {
 706                 return array(
 707                         'prop' => array(
 708                                 'Which additional properties to get:',
 709                                 ' protection   - List the protection level of each page',
 710                                 ' talkid       - The page ID of the talk page for each non-talk page',
 711                                 ' watched      - List the watched status of each page',
 712                                 ' subjectid    - The page ID of the parent page for each talk page',
 713                                 ' url          - Gives a full URL to the page, and also an edit URL',
 714                                 ' readable     - Whether the user can read this page',
 715                                 ' preload      - Gives the text returned by EditFormPreloadText',
 716                                 ' displaytitle - Gives the way the page title is actually displayed',
 717                         ),
 718                         'token' => 'Request a token to perform a data-modifying action on a page',
 719                         'continue' => 'When more results are available, use this to continue',
 720                 );
 721         }
 722
 723         public function getResultProperties() {
 724                 $props = array(
 725                         ApiBase::PROP_LIST => false,
 726                         '' => array(
 727                                 'touched' => 'timestamp',
 728                                 'lastrevid' => 'integer',
 729                                 'counter' => array(
 730                                         ApiBase::PROP_TYPE => 'integer',
 731                                         ApiBase::PROP_NULLABLE => true
 732                                 ),
 733                                 'length' => 'integer',
 734                                 'redirect' => 'boolean',
 735                                 'new' => 'boolean',
 736                                 'starttimestamp' => array(
 737                                         ApiBase::PROP_TYPE => 'timestamp',
 738                                         ApiBase::PROP_NULLABLE => true
 739                                 )
 740                         ),
 741                         'watched' => array(
 742                                 'watched' => 'boolean'
 743                         ),
 744                         'talkid' => array(
 745                                 'talkid' => array(
 746                                         ApiBase::PROP_TYPE => 'integer',
 747                                         ApiBase::PROP_NULLABLE => true
 748                                 )
 749                         ),
 750                         'subjectid' => array(
 751                                 'subjectid' => array(
 752                                         ApiBase::PROP_TYPE => 'integer',
 753                                         ApiBase::PROP_NULLABLE => true
 754                                 )
 755                         ),
 756                         'url' => array(
 757                                 'fullurl' => 'string',
 758                                 'editurl' => 'string'
 759                         ),
 760                         'readable' => array(
 761                                 'readable' => 'boolean'
 762                         ),
 763                         'preload' => array(
 764                                 'preload' => 'string'
 765                         ),
 766                         'displaytitle' => array(
 767                                 'displaytitle' => 'string'
 768                         )
 769                 );
 770
 771                 self::addTokenProperties( $props, $this->getTokenFunctions() );
 772
 773                 return $props;
 774         }
 775
 776         public function getDescription() {
 777                 return 'Get basic page information such as namespace, title, last touched date, ...';
 778         }
 779
 780         public function getPossibleErrors() {
 781                 return array_merge( parent::getPossibleErrors(), array(
 782                         array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
 783                 ) );
 784         }
 785
 786         public function getExamples() {
 787                 return array(
 788                         'api.php?action=query&prop=info&titles=Main%20Page',
 789                         'api.php?action=query&prop=info&inprop=protection&titles=Main%20Page'
 790                 );
 791         }
 792
 793         public function getHelpUrls() {
 794                 return 'https://www.mediawiki.org/wiki/API:Properties#info_.2F_in';
 795         }
 796
 797         public function getVersion() {
 798                 return __CLASS__ . ': $Id$';
 799         }
 800 }