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