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, $fld_watchers = false,
  37                 $fld_notificationtimestamp = false,
  38                 $fld_preload = false, $fld_displaytitle = false;
  39
  40         private $params, $titles, $missing, $everything, $pageCounter;
  41
  42         private $pageRestrictions, $pageIsRedir, $pageIsNew, $pageTouched,
  43                 $pageLatest, $pageLength;
  44
  45         private $protections, $watched, $watchers, $notificationtimestamps, $talkids, $subjectids, $displaytitles;
  46         private $showZeroWatchers = false;
  47
  48         private $tokenFunctions;
  49
  50         public function __construct( $query, $moduleName ) {
  51                 parent::__construct( $query, $moduleName, 'in' );
  52         }
  53
  54         /**
  55          * @param $pageSet ApiPageSet
  56          * @return void
  57          */
  58         public function requestExtraData( $pageSet ) {
  59                 global $wgDisableCounters, $wgContentHandlerUseDB;
  60
  61                 $pageSet->requestField( 'page_restrictions' );
  62                 // when resolving redirects, no page will have this field
  63                 if ( !$pageSet->isResolvingRedirects() ) {
  64                         $pageSet->requestField( 'page_is_redirect' );
  65                 }
  66                 $pageSet->requestField( 'page_is_new' );
  67                 if ( !$wgDisableCounters ) {
  68                         $pageSet->requestField( 'page_counter' );
  69                 }
  70                 $pageSet->requestField( 'page_touched' );
  71                 $pageSet->requestField( 'page_latest' );
  72                 $pageSet->requestField( 'page_len' );
  73                 if ( $wgContentHandlerUseDB ) {
  74                         $pageSet->requestField( 'page_content_model' );
  75                 }
  76         }
  77
  78         /**
  79          * Get an array mapping token names to their handler functions.
  80          * The prototype for a token function is func($pageid, $title)
  81          * it should return a token or false (permission denied)
  82          * @return array array(tokenname => function)
  83          */
  84         protected function getTokenFunctions() {
  85                 // Don't call the hooks twice
  86                 if ( isset( $this->tokenFunctions ) ) {
  87                         return $this->tokenFunctions;
  88                 }
  89
  90                 // If we're in JSON callback mode, no tokens can be obtained
  91                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  92                         return array();
  93                 }
  94
  95                 $this->tokenFunctions = array(
  96                         'edit' => array( 'ApiQueryInfo', 'getEditToken' ),
  97                         'delete' => array( 'ApiQueryInfo', 'getDeleteToken' ),
  98                         'protect' => array( 'ApiQueryInfo', 'getProtectToken' ),
  99                         'move' => array( 'ApiQueryInfo', 'getMoveToken' ),
 100                         'block' => array( 'ApiQueryInfo', 'getBlockToken' ),
 101                         'unblock' => array( 'ApiQueryInfo', 'getUnblockToken' ),
 102                         'email' => array( 'ApiQueryInfo', 'getEmailToken' ),
 103                         'import' => array( 'ApiQueryInfo', 'getImportToken' ),
 104                         'watch' => array( 'ApiQueryInfo', 'getWatchToken' ),
 105                 );
 106                 wfRunHooks( 'APIQueryInfoTokens', array( &$this->tokenFunctions ) );
 107                 return $this->tokenFunctions;
 108         }
 109
 110         static $cachedTokens = array();
 111
 112         public static function resetTokenCache() {
 113                 ApiQueryInfo::$cachedTokens = array();
 114         }
 115
 116         public static function getEditToken( $pageid, $title ) {
 117                 // We could check for $title->userCan('edit') here,
 118                 // but that's too expensive for this purpose
 119                 // and would break caching
 120                 global $wgUser;
 121                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 122                         return false;
 123                 }
 124
 125                 // The token is always the same, let's exploit that
 126                 if ( !isset( ApiQueryInfo::$cachedTokens['edit'] ) ) {
 127                         ApiQueryInfo::$cachedTokens['edit'] = $wgUser->getEditToken();
 128                 }
 129
 130                 return ApiQueryInfo::$cachedTokens['edit'];
 131         }
 132
 133         public static function getDeleteToken( $pageid, $title ) {
 134                 global $wgUser;
 135                 if ( !$wgUser->isAllowed( 'delete' ) ) {
 136                         return false;
 137                 }
 138
 139                 // The token is always the same, let's exploit that
 140                 if ( !isset( ApiQueryInfo::$cachedTokens['delete'] ) ) {
 141                         ApiQueryInfo::$cachedTokens['delete'] = $wgUser->getEditToken();
 142                 }
 143
 144                 return ApiQueryInfo::$cachedTokens['delete'];
 145         }
 146
 147         public static function getProtectToken( $pageid, $title ) {
 148                 global $wgUser;
 149                 if ( !$wgUser->isAllowed( 'protect' ) ) {
 150                         return false;
 151                 }
 152
 153                 // The token is always the same, let's exploit that
 154                 if ( !isset( ApiQueryInfo::$cachedTokens['protect'] ) ) {
 155                         ApiQueryInfo::$cachedTokens['protect'] = $wgUser->getEditToken();
 156                 }
 157
 158                 return ApiQueryInfo::$cachedTokens['protect'];
 159         }
 160
 161         public static function getMoveToken( $pageid, $title ) {
 162                 global $wgUser;
 163                 if ( !$wgUser->isAllowed( 'move' ) ) {
 164                         return false;
 165                 }
 166
 167                 // The token is always the same, let's exploit that
 168                 if ( !isset( ApiQueryInfo::$cachedTokens['move'] ) ) {
 169                         ApiQueryInfo::$cachedTokens['move'] = $wgUser->getEditToken();
 170                 }
 171
 172                 return ApiQueryInfo::$cachedTokens['move'];
 173         }
 174
 175         public static function getBlockToken( $pageid, $title ) {
 176                 global $wgUser;
 177                 if ( !$wgUser->isAllowed( 'block' ) ) {
 178                         return false;
 179                 }
 180
 181                 // The token is always the same, let's exploit that
 182                 if ( !isset( ApiQueryInfo::$cachedTokens['block'] ) ) {
 183                         ApiQueryInfo::$cachedTokens['block'] = $wgUser->getEditToken();
 184                 }
 185
 186                 return ApiQueryInfo::$cachedTokens['block'];
 187         }
 188
 189         public static function getUnblockToken( $pageid, $title ) {
 190                 // Currently, this is exactly the same as the block token
 191                 return self::getBlockToken( $pageid, $title );
 192         }
 193
 194         public static function getEmailToken( $pageid, $title ) {
 195                 global $wgUser;
 196                 if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailUser() ) {
 197                         return false;
 198                 }
 199
 200                 // The token is always the same, let's exploit that
 201                 if ( !isset( ApiQueryInfo::$cachedTokens['email'] ) ) {
 202                         ApiQueryInfo::$cachedTokens['email'] = $wgUser->getEditToken();
 203                 }
 204
 205                 return ApiQueryInfo::$cachedTokens['email'];
 206         }
 207
 208         public static function getImportToken( $pageid, $title ) {
 209                 global $wgUser;
 210                 if ( !$wgUser->isAllowedAny( 'import', 'importupload' ) ) {
 211                         return false;
 212                 }
 213
 214                 // The token is always the same, let's exploit that
 215                 if ( !isset( ApiQueryInfo::$cachedTokens['import'] ) ) {
 216                         ApiQueryInfo::$cachedTokens['import'] = $wgUser->getEditToken();
 217                 }
 218
 219                 return ApiQueryInfo::$cachedTokens['import'];
 220         }
 221
 222         public static function getWatchToken( $pageid, $title ) {
 223                 global $wgUser;
 224                 if ( !$wgUser->isLoggedIn() ) {
 225                         return false;
 226                 }
 227
 228                 // The token is always the same, let's exploit that
 229                 if ( !isset( ApiQueryInfo::$cachedTokens['watch'] ) ) {
 230                         ApiQueryInfo::$cachedTokens['watch'] = $wgUser->getEditToken( 'watch' );
 231                 }
 232
 233                 return ApiQueryInfo::$cachedTokens['watch'];
 234         }
 235
 236         public static function getOptionsToken( $pageid, $title ) {
 237                 global $wgUser;
 238                 if ( !$wgUser->isLoggedIn() ) {
 239                         return false;
 240                 }
 241
 242                 // The token is always the same, let's exploit that
 243                 if ( !isset( ApiQueryInfo::$cachedTokens['options'] ) ) {
 244                         ApiQueryInfo::$cachedTokens['options'] = $wgUser->getEditToken();
 245                 }
 246
 247                 return ApiQueryInfo::$cachedTokens['options'];
 248         }
 249
 250         public function execute() {
 251                 $this->params = $this->extractRequestParams();
 252                 if ( !is_null( $this->params['prop'] ) ) {
 253                         $prop = array_flip( $this->params['prop'] );
 254                         $this->fld_protection = isset( $prop['protection'] );
 255                         $this->fld_watched = isset( $prop['watched'] );
 256                         $this->fld_watchers = isset( $prop['watchers'] );
 257                         $this->fld_notificationtimestamp = isset( $prop['notificationtimestamp'] );
 258                         $this->fld_talkid = isset( $prop['talkid'] );
 259                         $this->fld_subjectid = isset( $prop['subjectid'] );
 260                         $this->fld_url = isset( $prop['url'] );
 261                         $this->fld_readable = isset( $prop['readable'] );
 262                         $this->fld_preload = isset( $prop['preload'] );
 263                         $this->fld_displaytitle = isset( $prop['displaytitle'] );
 264                 }
 265
 266                 $pageSet = $this->getPageSet();
 267                 $this->titles = $pageSet->getGoodTitles();
 268                 $this->missing = $pageSet->getMissingTitles();
 269                 $this->everything = $this->titles + $this->missing;
 270                 $result = $this->getResult();
 271
 272                 uasort( $this->everything, array( 'Title', 'compare' ) );
 273                 if ( !is_null( $this->params['continue'] ) ) {
 274                         // Throw away any titles we're gonna skip so they don't
 275                         // clutter queries
 276                         $cont = explode( '|', $this->params['continue'] );
 277                         $this->dieContinueUsageIf( count( $cont ) != 2 );
 278                         $conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
 279                         foreach ( $this->everything as $pageid => $title ) {
 280                                 if ( Title::compare( $title, $conttitle ) >= 0 ) {
 281                                         break;
 282                                 }
 283                                 unset( $this->titles[$pageid] );
 284                                 unset( $this->missing[$pageid] );
 285                                 unset( $this->everything[$pageid] );
 286                         }
 287                 }
 288
 289                 $this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
 290                 // when resolving redirects, no page will have this field
 291                 $this->pageIsRedir = !$pageSet->isResolvingRedirects()
 292                         ? $pageSet->getCustomField( 'page_is_redirect' )
 293                         : array();
 294                 $this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );
 295
 296                 global $wgDisableCounters;
 297
 298                 if ( !$wgDisableCounters ) {
 299                         $this->pageCounter = $pageSet->getCustomField( 'page_counter' );
 300                 }
 301                 $this->pageTouched = $pageSet->getCustomField( 'page_touched' );
 302                 $this->pageLatest = $pageSet->getCustomField( 'page_latest' );
 303                 $this->pageLength = $pageSet->getCustomField( 'page_len' );
 304
 305                 // Get protection info if requested
 306                 if ( $this->fld_protection ) {
 307                         $this->getProtectionInfo();
 308                 }
 309
 310                 if ( $this->fld_watched || $this->fld_notificationtimestamp ) {
 311                         $this->getWatchedInfo();
 312                 }
 313
 314                 if ( $this->fld_watchers ) {
 315                         $this->getWatcherInfo();
 316                 }
 317
 318                 // Run the talkid/subjectid query if requested
 319                 if ( $this->fld_talkid || $this->fld_subjectid ) {
 320                         $this->getTSIDs();
 321                 }
 322
 323                 if ( $this->fld_displaytitle ) {
 324                         $this->getDisplayTitle();
 325                 }
 326
 327                 /** @var $title Title */
 328                 foreach ( $this->everything as $pageid => $title ) {
 329                         $pageInfo = $this->extractPageInfo( $pageid, $title );
 330                         $fit = $result->addValue( array(
 331                                 'query',
 332                                 'pages'
 333                         ), $pageid, $pageInfo );
 334                         if ( !$fit ) {
 335                                 $this->setContinueEnumParameter( 'continue',
 336                                                 $title->getNamespace() . '|' .
 337                                                 $title->getText() );
 338                                 break;
 339                         }
 340                 }
 341         }
 342
 343         /**
 344          * Get a result array with information about a title
 345          * @param int $pageid Page ID (negative for missing titles)
 346          * @param $title Title object
 347          * @return array
 348          */
 349         private function extractPageInfo( $pageid, $title ) {
 350                 $pageInfo = array();
 351                 $titleExists = $pageid > 0; //$title->exists() needs pageid, which is not set for all title objects
 352                 $ns = $title->getNamespace();
 353                 $dbkey = $title->getDBkey();
 354
 355                 $pageInfo['contentmodel'] = $title->getContentModel();
 356                 $pageInfo['pagelanguage'] = $title->getPageLanguage()->getCode();
 357
 358                 if ( $titleExists ) {
 359                         global $wgDisableCounters;
 360
 361                         $pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
 362                         $pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
 363                         $pageInfo['counter'] = $wgDisableCounters
 364                                 ? ''
 365                                 : intval( $this->pageCounter[$pageid] );
 366                         $pageInfo['length'] = intval( $this->pageLength[$pageid] );
 367
 368                         if ( isset( $this->pageIsRedir[$pageid] ) && $this->pageIsRedir[$pageid] ) {
 369                                 $pageInfo['redirect'] = '';
 370                         }
 371                         if ( $this->pageIsNew[$pageid] ) {
 372                                 $pageInfo['new'] = '';
 373                         }
 374                 }
 375
 376                 if ( !is_null( $this->params['token'] ) ) {
 377                         $tokenFunctions = $this->getTokenFunctions();
 378                         $pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
 379                         foreach ( $this->params['token'] as $t ) {
 380                                 $val = call_user_func( $tokenFunctions[$t], $pageid, $title );
 381                                 if ( $val === false ) {
 382                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 383                                 } else {
 384                                         $pageInfo[$t . 'token'] = $val;
 385                                 }
 386                         }
 387                 }
 388
 389                 if ( $this->fld_protection ) {
 390                         $pageInfo['protection'] = array();
 391                         if ( isset( $this->protections[$ns][$dbkey] ) ) {
 392                                 $pageInfo['protection'] =
 393                                         $this->protections[$ns][$dbkey];
 394                         }
 395                         $this->getResult()->setIndexedTagName( $pageInfo['protection'], 'pr' );
 396                 }
 397
 398                 if ( $this->fld_watched && isset( $this->watched[$ns][$dbkey] ) ) {
 399                         $pageInfo['watched'] = '';
 400                 }
 401
 402                 if ( $this->fld_watchers ) {
 403                         if ( isset( $this->watchers[$ns][$dbkey] ) ) {
 404                                 $pageInfo['watchers'] = $this->watchers[$ns][$dbkey];
 405                         } elseif ( $this->showZeroWatchers ) {
 406                                 $pageInfo['watchers'] = 0;
 407                         }
 408                 }
 409
 410                 if ( $this->fld_notificationtimestamp ) {
 411                         $pageInfo['notificationtimestamp'] = '';
 412                         if ( isset( $this->notificationtimestamps[$ns][$dbkey] ) ) {
 413                                 $pageInfo['notificationtimestamp'] = wfTimestamp( TS_ISO_8601, $this->notificationtimestamps[$ns][$dbkey] );
 414                         }
 415                 }
 416
 417                 if ( $this->fld_talkid && isset( $this->talkids[$ns][$dbkey] ) ) {
 418                         $pageInfo['talkid'] = $this->talkids[$ns][$dbkey];
 419                 }
 420
 421                 if ( $this->fld_subjectid && isset( $this->subjectids[$ns][$dbkey] ) ) {
 422                         $pageInfo['subjectid'] = $this->subjectids[$ns][$dbkey];
 423                 }
 424
 425                 if ( $this->fld_url ) {
 426                         $pageInfo['fullurl'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 427                         $pageInfo['editurl'] = wfExpandUrl( $title->getFullURL( 'action=edit' ), PROTO_CURRENT );
 428                 }
 429                 if ( $this->fld_readable && $title->userCan( 'read', $this->getUser() ) ) {
 430                         $pageInfo['readable'] = '';
 431                 }
 432
 433                 if ( $this->fld_preload ) {
 434                         if ( $titleExists ) {
 435                                 $pageInfo['preload'] = '';
 436                         } else {
 437                                 $text = null;
 438                                 wfRunHooks( 'EditFormPreloadText', array( &$text, &$title ) );
 439
 440                                 $pageInfo['preload'] = $text;
 441                         }
 442                 }
 443
 444                 if ( $this->fld_displaytitle ) {
 445                         if ( isset( $this->displaytitles[$pageid] ) ) {
 446                                 $pageInfo['displaytitle'] = $this->displaytitles[$pageid];
 447                         } else {
 448                                 $pageInfo['displaytitle'] = $title->getPrefixedText();
 449                         }
 450                 }
 451
 452                 return $pageInfo;
 453         }
 454
 455         /**
 456          * Get information about protections and put it in $protections
 457          */
 458         private function getProtectionInfo() {
 459                 global $wgContLang;
 460                 $this->protections = array();
 461                 $db = $this->getDB();
 462
 463                 // Get normal protections for existing titles
 464                 if ( count( $this->titles ) ) {
 465                         $this->resetQueryParams();
 466                         $this->addTables( 'page_restrictions' );
 467                         $this->addFields( array( 'pr_page', 'pr_type', 'pr_level',
 468                                         'pr_expiry', 'pr_cascade' ) );
 469                         $this->addWhereFld( 'pr_page', array_keys( $this->titles ) );
 470
 471                         $res = $this->select( __METHOD__ );
 472                         foreach ( $res as $row ) {
 473                                 /** @var $title Title */
 474                                 $title = $this->titles[$row->pr_page];
 475                                 $a = array(
 476                                         'type' => $row->pr_type,
 477                                         'level' => $row->pr_level,
 478                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 )
 479                                 );
 480                                 if ( $row->pr_cascade ) {
 481                                         $a['cascade'] = '';
 482                                 }
 483                                 $this->protections[$title->getNamespace()][$title->getDBkey()][] = $a;
 484                         }
 485                         // Also check old restrictions
 486                         foreach ( $this->titles as $pageId => $title ) {
 487                                 if ( $this->pageRestrictions[$pageId] ) {
 488                                         $namespace = $title->getNamespace();
 489                                         $dbKey = $title->getDBkey();
 490                                         $restrictions = explode( ':', trim( $this->pageRestrictions[$pageId] ) );
 491                                         foreach ( $restrictions as $restrict ) {
 492                                                 $temp = explode( '=', trim( $restrict ) );
 493                                                 if ( count( $temp ) == 1 ) {
 494                                                         // old old format should be treated as edit/move restriction
 495                                                         $restriction = trim( $temp[0] );
 496
 497                                                         if ( $restriction == '' ) {
 498                                                                 continue;
 499                                                         }
 500                                                         $this->protections[$namespace][$dbKey][] = array(
 501                                                                 'type' => 'edit',
 502                                                                 'level' => $restriction,
 503                                                                 'expiry' => 'infinity',
 504                                                         );
 505                                                         $this->protections[$namespace][$dbKey][] = array(
 506                                                                 'type' => 'move',
 507                                                                 'level' => $restriction,
 508                                                                 'expiry' => 'infinity',
 509                                                         );
 510                                                 } else {
 511                                                         $restriction = trim( $temp[1] );
 512                                                         if ( $restriction == '' ) {
 513                                                                 continue;
 514                                                         }
 515                                                         $this->protections[$namespace][$dbKey][] = array(
 516                                                                 'type' => $temp[0],
 517                                                                 'level' => $restriction,
 518                                                                 'expiry' => 'infinity',
 519                                                         );
 520                                                 }
 521                                         }
 522                                 }
 523                         }
 524                 }
 525
 526                 // Get protections for missing titles
 527                 if ( count( $this->missing ) ) {
 528                         $this->resetQueryParams();
 529                         $lb = new LinkBatch( $this->missing );
 530                         $this->addTables( 'protected_titles' );
 531                         $this->addFields( array( 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ) );
 532                         $this->addWhere( $lb->constructSet( 'pt', $db ) );
 533                         $res = $this->select( __METHOD__ );
 534                         foreach ( $res as $row ) {
 535                                 $this->protections[$row->pt_namespace][$row->pt_title][] = array(
 536                                         'type' => 'create',
 537                                         'level' => $row->pt_create_perm,
 538                                         'expiry' => $wgContLang->formatExpiry( $row->pt_expiry, TS_ISO_8601 )
 539                                 );
 540                         }
 541                 }
 542
 543                 // Cascading protections
 544                 $images = $others = array();
 545                 foreach ( $this->everything as $title ) {
 546                         if ( $title->getNamespace() == NS_FILE ) {
 547                                 $images[] = $title->getDBkey();
 548                         } else {
 549                                 $others[] = $title;
 550                         }
 551                 }
 552
 553                 if ( count( $others ) ) {
 554                         // Non-images: check templatelinks
 555                         $lb = new LinkBatch( $others );
 556                         $this->resetQueryParams();
 557                         $this->addTables( array( 'page_restrictions', 'page', 'templatelinks' ) );
 558                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 559                                         'page_title', 'page_namespace',
 560                                         'tl_title', 'tl_namespace' ) );
 561                         $this->addWhere( $lb->constructSet( 'tl', $db ) );
 562                         $this->addWhere( 'pr_page = page_id' );
 563                         $this->addWhere( 'pr_page = tl_from' );
 564                         $this->addWhereFld( 'pr_cascade', 1 );
 565
 566                         $res = $this->select( __METHOD__ );
 567                         foreach ( $res as $row ) {
 568                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 569                                 $this->protections[$row->tl_namespace][$row->tl_title][] = array(
 570                                         'type' => $row->pr_type,
 571                                         'level' => $row->pr_level,
 572                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 573                                         'source' => $source->getPrefixedText()
 574                                 );
 575                         }
 576                 }
 577
 578                 if ( count( $images ) ) {
 579                         // Images: check imagelinks
 580                         $this->resetQueryParams();
 581                         $this->addTables( array( 'page_restrictions', 'page', 'imagelinks' ) );
 582                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 583                                         'page_title', 'page_namespace', 'il_to' ) );
 584                         $this->addWhere( 'pr_page = page_id' );
 585                         $this->addWhere( 'pr_page = il_from' );
 586                         $this->addWhereFld( 'pr_cascade', 1 );
 587                         $this->addWhereFld( 'il_to', $images );
 588
 589                         $res = $this->select( __METHOD__ );
 590                         foreach ( $res as $row ) {
 591                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 592                                 $this->protections[NS_FILE][$row->il_to][] = array(
 593                                         'type' => $row->pr_type,
 594                                         'level' => $row->pr_level,
 595                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 596                                         'source' => $source->getPrefixedText()
 597                                 );
 598                         }
 599                 }
 600         }
 601
 602         /**
 603          * Get talk page IDs (if requested) and subject page IDs (if requested)
 604          * and put them in $talkids and $subjectids
 605          */
 606         private function getTSIDs() {
 607                 $getTitles = $this->talkids = $this->subjectids = array();
 608
 609                 /** @var $t Title */
 610                 foreach ( $this->everything as $t ) {
 611                         if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
 612                                 if ( $this->fld_subjectid ) {
 613                                         $getTitles[] = $t->getSubjectPage();
 614                                 }
 615                         } elseif ( $this->fld_talkid ) {
 616                                 $getTitles[] = $t->getTalkPage();
 617                         }
 618                 }
 619                 if ( !count( $getTitles ) ) {
 620                         return;
 621                 }
 622
 623                 $db = $this->getDB();
 624
 625                 // Construct a custom WHERE clause that matches
 626                 // all titles in $getTitles
 627                 $lb = new LinkBatch( $getTitles );
 628                 $this->resetQueryParams();
 629                 $this->addTables( 'page' );
 630                 $this->addFields( array( 'page_title', 'page_namespace', 'page_id' ) );
 631                 $this->addWhere( $lb->constructSet( 'page', $db ) );
 632                 $res = $this->select( __METHOD__ );
 633                 foreach ( $res as $row ) {
 634                         if ( MWNamespace::isTalk( $row->page_namespace ) ) {
 635                                 $this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
 636                                                 intval( $row->page_id );
 637                         } else {
 638                                 $this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
 639                                                 intval( $row->page_id );
 640                         }
 641                 }
 642         }
 643
 644         private function getDisplayTitle() {
 645                 $this->displaytitles = array();
 646
 647                 $pageIds = array_keys( $this->titles );
 648
 649                 if ( !count( $pageIds ) ) {
 650                         return;
 651                 }
 652
 653                 $this->resetQueryParams();
 654                 $this->addTables( 'page_props' );
 655                 $this->addFields( array( 'pp_page', 'pp_value' ) );
 656                 $this->addWhereFld( 'pp_page', $pageIds );
 657                 $this->addWhereFld( 'pp_propname', 'displaytitle' );
 658                 $res = $this->select( __METHOD__ );
 659
 660                 foreach ( $res as $row ) {
 661                         $this->displaytitles[$row->pp_page] = $row->pp_value;
 662                 }
 663         }
 664
 665         /**
 666          * Get information about watched status and put it in $this->watched
 667          * and $this->notificationtimestamps
 668          */
 669         private function getWatchedInfo() {
 670                 $user = $this->getUser();
 671
 672                 if ( $user->isAnon() || count( $this->everything ) == 0 ) {
 673                         return;
 674                 }
 675
 676                 $this->watched = array();
 677                 $this->notificationtimestamps = array();
 678                 $db = $this->getDB();
 679
 680                 $lb = new LinkBatch( $this->everything );
 681
 682                 $this->resetQueryParams();
 683                 $this->addTables( array( 'watchlist' ) );
 684                 $this->addFields( array( 'wl_title', 'wl_namespace' ) );
 685                 $this->addFieldsIf( 'wl_notificationtimestamp', $this->fld_notificationtimestamp );
 686                 $this->addWhere( array(
 687                         $lb->constructSet( 'wl', $db ),
 688                         'wl_user' => $user->getID()
 689                 ) );
 690
 691                 $res = $this->select( __METHOD__ );
 692
 693                 foreach ( $res as $row ) {
 694                         if ( $this->fld_watched ) {
 695                                 $this->watched[$row->wl_namespace][$row->wl_title] = true;
 696                         }
 697                         if ( $this->fld_notificationtimestamp ) {
 698                                 $this->notificationtimestamps[$row->wl_namespace][$row->wl_title] = $row->wl_notificationtimestamp;
 699                         }
 700                 }
 701         }
 702
 703         /**
 704          * Get the count of watchers and put it in $this->watchers
 705          */
 706         private function getWatcherInfo() {
 707                 global $wgUnwatchedPageThreshold;
 708
 709                 if ( count( $this->everything ) == 0 ) {
 710                         return;
 711                 }
 712
 713                 $user = $this->getUser();
 714                 $canUnwatchedpages = $user->isAllowed( 'unwatchedpages' );
 715                 if ( !$canUnwatchedpages && !is_int( $wgUnwatchedPageThreshold ) ) {
 716                         return;
 717                 }
 718
 719                 $this->watchers = array();
 720                 $this->showZeroWatchers = $canUnwatchedpages;
 721                 $db = $this->getDB();
 722
 723                 $lb = new LinkBatch( $this->everything );
 724
 725                 $this->resetQueryParams();
 726                 $this->addTables( array( 'watchlist' ) );
 727                 $this->addFields( array( 'wl_title', 'wl_namespace', 'count' => 'COUNT(*)' ) );
 728                 $this->addWhere( array(
 729                         $lb->constructSet( 'wl', $db )
 730                 ) );
 731                 $this->addOption( 'GROUP BY', array( 'wl_namespace', 'wl_title' ) );
 732                 if ( !$canUnwatchedpages ) {
 733                         $this->addOption( 'HAVING', "COUNT(*) >= $wgUnwatchedPageThreshold" );
 734                 }
 735
 736                 $res = $this->select( __METHOD__ );
 737
 738                 foreach ( $res as $row ) {
 739                         $this->watchers[$row->wl_namespace][$row->wl_title] = (int)$row->count;
 740                 }
 741         }
 742
 743         public function getCacheMode( $params ) {
 744                 $publicProps = array(
 745                         'protection',
 746                         'talkid',
 747                         'subjectid',
 748                         'url',
 749                         'preload',
 750                         'displaytitle',
 751                 );
 752                 if ( !is_null( $params['prop'] ) ) {
 753                         foreach ( $params['prop'] as $prop ) {
 754                                 if ( !in_array( $prop, $publicProps ) ) {
 755                                         return 'private';
 756                                 }
 757                         }
 758                 }
 759                 if ( !is_null( $params['token'] ) ) {
 760                         return 'private';
 761                 }
 762                 return 'public';
 763         }
 764
 765         public function getAllowedParams() {
 766                 return array(
 767                         'prop' => array(
 768                                 ApiBase::PARAM_DFLT => null,
 769                                 ApiBase::PARAM_ISMULTI => true,
 770                                 ApiBase::PARAM_TYPE => array(
 771                                         'protection',
 772                                         'talkid',
 773                                         'watched', # private
 774                                         'watchers', # private
 775                                         'notificationtimestamp', # private
 776                                         'subjectid',
 777                                         'url',
 778                                         'readable', # private
 779                                         'preload',
 780                                         'displaytitle',
 781                                         // If you add more properties here, please consider whether they
 782                                         // need to be added to getCacheMode()
 783                                 ) ),
 784                         'token' => array(
 785                                 ApiBase::PARAM_DFLT => null,
 786                                 ApiBase::PARAM_ISMULTI => true,
 787                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
 788                         ),
 789                         'continue' => null,
 790                 );
 791         }
 792
 793         public function getParamDescription() {
 794                 return array(
 795                         'prop' => array(
 796                                 'Which additional properties to get:',
 797                                 ' protection            - List the protection level of each page',
 798                                 ' talkid                - The page ID of the talk page for each non-talk page',
 799                                 ' watched               - List the watched status of each page',
 800                                 ' watchers              - The number of watchers, if allowed',
 801                                 ' notificationtimestamp - The watchlist notification timestamp of each page',
 802                                 ' subjectid             - The page ID of the parent page for each talk page',
 803                                 ' url                   - Gives a full URL to the page, and also an edit URL',
 804                                 ' readable              - Whether the user can read this page',
 805                                 ' preload               - Gives the text returned by EditFormPreloadText',
 806                                 ' displaytitle          - Gives the way the page title is actually displayed',
 807                         ),
 808                         'token' => 'Request a token to perform a data-modifying action on a page',
 809                         'continue' => 'When more results are available, use this to continue',
 810                 );
 811         }
 812
 813         public function getResultProperties() {
 814                 $props = array(
 815                         ApiBase::PROP_LIST => false,
 816                         '' => array(
 817                                 'touched' => 'timestamp',
 818                                 'lastrevid' => 'integer',
 819                                 'counter' => array(
 820                                         ApiBase::PROP_TYPE => 'integer',
 821                                         ApiBase::PROP_NULLABLE => true
 822                                 ),
 823                                 'length' => 'integer',
 824                                 'redirect' => 'boolean',
 825                                 'new' => 'boolean',
 826                                 'starttimestamp' => array(
 827                                         ApiBase::PROP_TYPE => 'timestamp',
 828                                         ApiBase::PROP_NULLABLE => true
 829                                 ),
 830                                 'contentmodel' => 'string',
 831                         ),
 832                         'watched' => array(
 833                                 'watched' => 'boolean'
 834                         ),
 835                         'watchers' => array(
 836                                 'watchers' => array(
 837                                         ApiBase::PROP_TYPE => 'integer',
 838                                         ApiBase::PROP_NULLABLE => true
 839                                 )
 840                         ),
 841                         'notificationtimestamp' => array(
 842                                 'notificationtimestamp' => array(
 843                                         ApiBase::PROP_TYPE => 'timestamp',
 844                                         ApiBase::PROP_NULLABLE => true
 845                                 )
 846                         ),
 847                         'talkid' => array(
 848                                 'talkid' => array(
 849                                         ApiBase::PROP_TYPE => 'integer',
 850                                         ApiBase::PROP_NULLABLE => true
 851                                 )
 852                         ),
 853                         'subjectid' => array(
 854                                 'subjectid' => array(
 855                                         ApiBase::PROP_TYPE => 'integer',
 856                                         ApiBase::PROP_NULLABLE => true
 857                                 )
 858                         ),
 859                         'url' => array(
 860                                 'fullurl' => 'string',
 861                                 'editurl' => 'string'
 862                         ),
 863                         'readable' => array(
 864                                 'readable' => 'boolean'
 865                         ),
 866                         'preload' => array(
 867                                 'preload' => 'string'
 868                         ),
 869                         'displaytitle' => array(
 870                                 'displaytitle' => 'string'
 871                         )
 872                 );
 873
 874                 self::addTokenProperties( $props, $this->getTokenFunctions() );
 875
 876                 return $props;
 877         }
 878
 879         public function getDescription() {
 880                 return 'Get basic page information such as namespace, title, last touched date, ...';
 881         }
 882
 883         public function getExamples() {
 884                 return array(
 885                         'api.php?action=query&prop=info&titles=Main%20Page',
 886                         'api.php?action=query&prop=info&inprop=protection&titles=Main%20Page'
 887                 );
 888         }
 889
 890         public function getHelpUrls() {
 891                 return 'https://www.mediawiki.org/wiki/API:Properties#info_.2F_in';
 892         }
 893 }