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