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          * @deprecated since 1.24
  83          * @return array Array(tokenname => function)
  84          */
  85         protected function getTokenFunctions() {
  86                 // Don't call the hooks twice
  87                 if ( isset( $this->tokenFunctions ) ) {
  88                         return $this->tokenFunctions;
  89                 }
  90
  91                 // If we're in JSON callback mode, no tokens can be obtained
  92                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  93                         return array();
  94                 }
  95
  96                 $this->tokenFunctions = array(
  97                         'edit' => array( 'ApiQueryInfo', 'getEditToken' ),
  98                         'delete' => array( 'ApiQueryInfo', 'getDeleteToken' ),
  99                         'protect' => array( 'ApiQueryInfo', 'getProtectToken' ),
 100                         'move' => array( 'ApiQueryInfo', 'getMoveToken' ),
 101                         'block' => array( 'ApiQueryInfo', 'getBlockToken' ),
 102                         'unblock' => array( 'ApiQueryInfo', 'getUnblockToken' ),
 103                         'email' => array( 'ApiQueryInfo', 'getEmailToken' ),
 104                         'import' => array( 'ApiQueryInfo', 'getImportToken' ),
 105                         'watch' => array( 'ApiQueryInfo', 'getWatchToken' ),
 106                 );
 107                 wfRunHooks( 'APIQueryInfoTokens', array( &$this->tokenFunctions ) );
 108
 109                 return $this->tokenFunctions;
 110         }
 111
 112         static protected $cachedTokens = array();
 113
 114         /**
 115          * @deprecated since 1.24
 116          */
 117         public static function resetTokenCache() {
 118                 ApiQueryInfo::$cachedTokens = array();
 119         }
 120
 121         /**
 122          * @deprecated since 1.24
 123          */
 124         public static function getEditToken( $pageid, $title ) {
 125                 // We could check for $title->userCan('edit') here,
 126                 // but that's too expensive for this purpose
 127                 // and would break caching
 128                 global $wgUser;
 129                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 130                         return false;
 131                 }
 132
 133                 // The token is always the same, let's exploit that
 134                 if ( !isset( ApiQueryInfo::$cachedTokens['edit'] ) ) {
 135                         ApiQueryInfo::$cachedTokens['edit'] = $wgUser->getEditToken();
 136                 }
 137
 138                 return ApiQueryInfo::$cachedTokens['edit'];
 139         }
 140
 141         /**
 142          * @deprecated since 1.24
 143          */
 144         public static function getDeleteToken( $pageid, $title ) {
 145                 global $wgUser;
 146                 if ( !$wgUser->isAllowed( 'delete' ) ) {
 147                         return false;
 148                 }
 149
 150                 // The token is always the same, let's exploit that
 151                 if ( !isset( ApiQueryInfo::$cachedTokens['delete'] ) ) {
 152                         ApiQueryInfo::$cachedTokens['delete'] = $wgUser->getEditToken();
 153                 }
 154
 155                 return ApiQueryInfo::$cachedTokens['delete'];
 156         }
 157
 158         /**
 159          * @deprecated since 1.24
 160          */
 161         public static function getProtectToken( $pageid, $title ) {
 162                 global $wgUser;
 163                 if ( !$wgUser->isAllowed( 'protect' ) ) {
 164                         return false;
 165                 }
 166
 167                 // The token is always the same, let's exploit that
 168                 if ( !isset( ApiQueryInfo::$cachedTokens['protect'] ) ) {
 169                         ApiQueryInfo::$cachedTokens['protect'] = $wgUser->getEditToken();
 170                 }
 171
 172                 return ApiQueryInfo::$cachedTokens['protect'];
 173         }
 174
 175         /**
 176          * @deprecated since 1.24
 177          */
 178         public static function getMoveToken( $pageid, $title ) {
 179                 global $wgUser;
 180                 if ( !$wgUser->isAllowed( 'move' ) ) {
 181                         return false;
 182                 }
 183
 184                 // The token is always the same, let's exploit that
 185                 if ( !isset( ApiQueryInfo::$cachedTokens['move'] ) ) {
 186                         ApiQueryInfo::$cachedTokens['move'] = $wgUser->getEditToken();
 187                 }
 188
 189                 return ApiQueryInfo::$cachedTokens['move'];
 190         }
 191
 192         /**
 193          * @deprecated since 1.24
 194          */
 195         public static function getBlockToken( $pageid, $title ) {
 196                 global $wgUser;
 197                 if ( !$wgUser->isAllowed( 'block' ) ) {
 198                         return false;
 199                 }
 200
 201                 // The token is always the same, let's exploit that
 202                 if ( !isset( ApiQueryInfo::$cachedTokens['block'] ) ) {
 203                         ApiQueryInfo::$cachedTokens['block'] = $wgUser->getEditToken();
 204                 }
 205
 206                 return ApiQueryInfo::$cachedTokens['block'];
 207         }
 208
 209         /**
 210          * @deprecated since 1.24
 211          */
 212         public static function getUnblockToken( $pageid, $title ) {
 213                 // Currently, this is exactly the same as the block token
 214                 return self::getBlockToken( $pageid, $title );
 215         }
 216
 217         /**
 218          * @deprecated since 1.24
 219          */
 220         public static function getEmailToken( $pageid, $title ) {
 221                 global $wgUser;
 222                 if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailUser() ) {
 223                         return false;
 224                 }
 225
 226                 // The token is always the same, let's exploit that
 227                 if ( !isset( ApiQueryInfo::$cachedTokens['email'] ) ) {
 228                         ApiQueryInfo::$cachedTokens['email'] = $wgUser->getEditToken();
 229                 }
 230
 231                 return ApiQueryInfo::$cachedTokens['email'];
 232         }
 233
 234         /**
 235          * @deprecated since 1.24
 236          */
 237         public static function getImportToken( $pageid, $title ) {
 238                 global $wgUser;
 239                 if ( !$wgUser->isAllowedAny( 'import', 'importupload' ) ) {
 240                         return false;
 241                 }
 242
 243                 // The token is always the same, let's exploit that
 244                 if ( !isset( ApiQueryInfo::$cachedTokens['import'] ) ) {
 245                         ApiQueryInfo::$cachedTokens['import'] = $wgUser->getEditToken();
 246                 }
 247
 248                 return ApiQueryInfo::$cachedTokens['import'];
 249         }
 250
 251         /**
 252          * @deprecated since 1.24
 253          */
 254         public static function getWatchToken( $pageid, $title ) {
 255                 global $wgUser;
 256                 if ( !$wgUser->isLoggedIn() ) {
 257                         return false;
 258                 }
 259
 260                 // The token is always the same, let's exploit that
 261                 if ( !isset( ApiQueryInfo::$cachedTokens['watch'] ) ) {
 262                         ApiQueryInfo::$cachedTokens['watch'] = $wgUser->getEditToken( 'watch' );
 263                 }
 264
 265                 return ApiQueryInfo::$cachedTokens['watch'];
 266         }
 267
 268         /**
 269          * @deprecated since 1.24
 270          */
 271         public static function getOptionsToken( $pageid, $title ) {
 272                 global $wgUser;
 273                 if ( !$wgUser->isLoggedIn() ) {
 274                         return false;
 275                 }
 276
 277                 // The token is always the same, let's exploit that
 278                 if ( !isset( ApiQueryInfo::$cachedTokens['options'] ) ) {
 279                         ApiQueryInfo::$cachedTokens['options'] = $wgUser->getEditToken();
 280                 }
 281
 282                 return ApiQueryInfo::$cachedTokens['options'];
 283         }
 284
 285         public function execute() {
 286                 $this->params = $this->extractRequestParams();
 287                 if ( !is_null( $this->params['prop'] ) ) {
 288                         $prop = array_flip( $this->params['prop'] );
 289                         $this->fld_protection = isset( $prop['protection'] );
 290                         $this->fld_watched = isset( $prop['watched'] );
 291                         $this->fld_watchers = isset( $prop['watchers'] );
 292                         $this->fld_notificationtimestamp = isset( $prop['notificationtimestamp'] );
 293                         $this->fld_talkid = isset( $prop['talkid'] );
 294                         $this->fld_subjectid = isset( $prop['subjectid'] );
 295                         $this->fld_url = isset( $prop['url'] );
 296                         $this->fld_readable = isset( $prop['readable'] );
 297                         $this->fld_preload = isset( $prop['preload'] );
 298                         $this->fld_displaytitle = isset( $prop['displaytitle'] );
 299                 }
 300
 301                 $pageSet = $this->getPageSet();
 302                 $this->titles = $pageSet->getGoodTitles();
 303                 $this->missing = $pageSet->getMissingTitles();
 304                 $this->everything = $this->titles + $this->missing;
 305                 $result = $this->getResult();
 306
 307                 uasort( $this->everything, array( 'Title', 'compare' ) );
 308                 if ( !is_null( $this->params['continue'] ) ) {
 309                         // Throw away any titles we're gonna skip so they don't
 310                         // clutter queries
 311                         $cont = explode( '|', $this->params['continue'] );
 312                         $this->dieContinueUsageIf( count( $cont ) != 2 );
 313                         $conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
 314                         foreach ( $this->everything as $pageid => $title ) {
 315                                 if ( Title::compare( $title, $conttitle ) >= 0 ) {
 316                                         break;
 317                                 }
 318                                 unset( $this->titles[$pageid] );
 319                                 unset( $this->missing[$pageid] );
 320                                 unset( $this->everything[$pageid] );
 321                         }
 322                 }
 323
 324                 $this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
 325                 // when resolving redirects, no page will have this field
 326                 $this->pageIsRedir = !$pageSet->isResolvingRedirects()
 327                         ? $pageSet->getCustomField( 'page_is_redirect' )
 328                         : array();
 329                 $this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );
 330
 331                 if ( !$this->getConfig()->get( 'DisableCounters' ) ) {
 332                         $this->pageCounter = $pageSet->getCustomField( 'page_counter' );
 333                 }
 334                 $this->pageTouched = $pageSet->getCustomField( 'page_touched' );
 335                 $this->pageLatest = $pageSet->getCustomField( 'page_latest' );
 336                 $this->pageLength = $pageSet->getCustomField( 'page_len' );
 337
 338                 // Get protection info if requested
 339                 if ( $this->fld_protection ) {
 340                         $this->getProtectionInfo();
 341                 }
 342
 343                 if ( $this->fld_watched || $this->fld_notificationtimestamp ) {
 344                         $this->getWatchedInfo();
 345                 }
 346
 347                 if ( $this->fld_watchers ) {
 348                         $this->getWatcherInfo();
 349                 }
 350
 351                 // Run the talkid/subjectid query if requested
 352                 if ( $this->fld_talkid || $this->fld_subjectid ) {
 353                         $this->getTSIDs();
 354                 }
 355
 356                 if ( $this->fld_displaytitle ) {
 357                         $this->getDisplayTitle();
 358                 }
 359
 360                 /** @var $title Title */
 361                 foreach ( $this->everything as $pageid => $title ) {
 362                         $pageInfo = $this->extractPageInfo( $pageid, $title );
 363                         $fit = $result->addValue( array(
 364                                 'query',
 365                                 'pages'
 366                         ), $pageid, $pageInfo );
 367                         if ( !$fit ) {
 368                                 $this->setContinueEnumParameter( 'continue',
 369                                         $title->getNamespace() . '|' .
 370                                         $title->getText() );
 371                                 break;
 372                         }
 373                 }
 374         }
 375
 376         /**
 377          * Get a result array with information about a title
 378          * @param int $pageid Page ID (negative for missing titles)
 379          * @param Title $title
 380          * @return array
 381          */
 382         private function extractPageInfo( $pageid, $title ) {
 383                 $pageInfo = array();
 384                 // $title->exists() needs pageid, which is not set for all title objects
 385                 $titleExists = $pageid > 0;
 386                 $ns = $title->getNamespace();
 387                 $dbkey = $title->getDBkey();
 388
 389                 $pageInfo['contentmodel'] = $title->getContentModel();
 390                 $pageInfo['pagelanguage'] = $title->getPageLanguage()->getCode();
 391
 392                 if ( $titleExists ) {
 393                         $pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
 394                         $pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
 395                         $pageInfo['counter'] = $this->getConfig()->get( 'DisableCounters' )
 396                                 ? ''
 397                                 : intval( $this->pageCounter[$pageid] );
 398                         $pageInfo['length'] = intval( $this->pageLength[$pageid] );
 399
 400                         if ( isset( $this->pageIsRedir[$pageid] ) && $this->pageIsRedir[$pageid] ) {
 401                                 $pageInfo['redirect'] = '';
 402                         }
 403                         if ( $this->pageIsNew[$pageid] ) {
 404                                 $pageInfo['new'] = '';
 405                         }
 406                 }
 407
 408                 if ( !is_null( $this->params['token'] ) ) {
 409                         $tokenFunctions = $this->getTokenFunctions();
 410                         $pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
 411                         foreach ( $this->params['token'] as $t ) {
 412                                 $val = call_user_func( $tokenFunctions[$t], $pageid, $title );
 413                                 if ( $val === false ) {
 414                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 415                                 } else {
 416                                         $pageInfo[$t . 'token'] = $val;
 417                                 }
 418                         }
 419                 }
 420
 421                 if ( $this->fld_protection ) {
 422                         $pageInfo['protection'] = array();
 423                         if ( isset( $this->protections[$ns][$dbkey] ) ) {
 424                                 $pageInfo['protection'] =
 425                                         $this->protections[$ns][$dbkey];
 426                         }
 427                         $this->getResult()->setIndexedTagName( $pageInfo['protection'], 'pr' );
 428                 }
 429
 430                 if ( $this->fld_watched && isset( $this->watched[$ns][$dbkey] ) ) {
 431                         $pageInfo['watched'] = '';
 432                 }
 433
 434                 if ( $this->fld_watchers ) {
 435                         if ( isset( $this->watchers[$ns][$dbkey] ) ) {
 436                                 $pageInfo['watchers'] = $this->watchers[$ns][$dbkey];
 437                         } elseif ( $this->showZeroWatchers ) {
 438                                 $pageInfo['watchers'] = 0;
 439                         }
 440                 }
 441
 442                 if ( $this->fld_notificationtimestamp ) {
 443                         $pageInfo['notificationtimestamp'] = '';
 444                         if ( isset( $this->notificationtimestamps[$ns][$dbkey] ) ) {
 445                                 $pageInfo['notificationtimestamp'] =
 446                                         wfTimestamp( TS_ISO_8601, $this->notificationtimestamps[$ns][$dbkey] );
 447                         }
 448                 }
 449
 450                 if ( $this->fld_talkid && isset( $this->talkids[$ns][$dbkey] ) ) {
 451                         $pageInfo['talkid'] = $this->talkids[$ns][$dbkey];
 452                 }
 453
 454                 if ( $this->fld_subjectid && isset( $this->subjectids[$ns][$dbkey] ) ) {
 455                         $pageInfo['subjectid'] = $this->subjectids[$ns][$dbkey];
 456                 }
 457
 458                 if ( $this->fld_url ) {
 459                         $pageInfo['fullurl'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 460                         $pageInfo['editurl'] = wfExpandUrl( $title->getFullURL( 'action=edit' ), PROTO_CURRENT );
 461                 }
 462                 if ( $this->fld_readable && $title->userCan( 'read', $this->getUser() ) ) {
 463                         $pageInfo['readable'] = '';
 464                 }
 465
 466                 if ( $this->fld_preload ) {
 467                         if ( $titleExists ) {
 468                                 $pageInfo['preload'] = '';
 469                         } else {
 470                                 $text = null;
 471                                 wfRunHooks( 'EditFormPreloadText', array( &$text, &$title ) );
 472
 473                                 $pageInfo['preload'] = $text;
 474                         }
 475                 }
 476
 477                 if ( $this->fld_displaytitle ) {
 478                         if ( isset( $this->displaytitles[$pageid] ) ) {
 479                                 $pageInfo['displaytitle'] = $this->displaytitles[$pageid];
 480                         } else {
 481                                 $pageInfo['displaytitle'] = $title->getPrefixedText();
 482                         }
 483                 }
 484
 485                 return $pageInfo;
 486         }
 487
 488         /**
 489          * Get information about protections and put it in $protections
 490          */
 491         private function getProtectionInfo() {
 492                 global $wgContLang;
 493                 $this->protections = array();
 494                 $db = $this->getDB();
 495
 496                 // Get normal protections for existing titles
 497                 if ( count( $this->titles ) ) {
 498                         $this->resetQueryParams();
 499                         $this->addTables( 'page_restrictions' );
 500                         $this->addFields( array( 'pr_page', 'pr_type', 'pr_level',
 501                                 'pr_expiry', 'pr_cascade' ) );
 502                         $this->addWhereFld( 'pr_page', array_keys( $this->titles ) );
 503
 504                         $res = $this->select( __METHOD__ );
 505                         foreach ( $res as $row ) {
 506                                 /** @var $title Title */
 507                                 $title = $this->titles[$row->pr_page];
 508                                 $a = array(
 509                                         'type' => $row->pr_type,
 510                                         'level' => $row->pr_level,
 511                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 )
 512                                 );
 513                                 if ( $row->pr_cascade ) {
 514                                         $a['cascade'] = '';
 515                                 }
 516                                 $this->protections[$title->getNamespace()][$title->getDBkey()][] = $a;
 517                         }
 518                         // Also check old restrictions
 519                         foreach ( $this->titles as $pageId => $title ) {
 520                                 if ( $this->pageRestrictions[$pageId] ) {
 521                                         $namespace = $title->getNamespace();
 522                                         $dbKey = $title->getDBkey();
 523                                         $restrictions = explode( ':', trim( $this->pageRestrictions[$pageId] ) );
 524                                         foreach ( $restrictions as $restrict ) {
 525                                                 $temp = explode( '=', trim( $restrict ) );
 526                                                 if ( count( $temp ) == 1 ) {
 527                                                         // old old format should be treated as edit/move restriction
 528                                                         $restriction = trim( $temp[0] );
 529
 530                                                         if ( $restriction == '' ) {
 531                                                                 continue;
 532                                                         }
 533                                                         $this->protections[$namespace][$dbKey][] = array(
 534                                                                 'type' => 'edit',
 535                                                                 'level' => $restriction,
 536                                                                 'expiry' => 'infinity',
 537                                                         );
 538                                                         $this->protections[$namespace][$dbKey][] = array(
 539                                                                 'type' => 'move',
 540                                                                 'level' => $restriction,
 541                                                                 'expiry' => 'infinity',
 542                                                         );
 543                                                 } else {
 544                                                         $restriction = trim( $temp[1] );
 545                                                         if ( $restriction == '' ) {
 546                                                                 continue;
 547                                                         }
 548                                                         $this->protections[$namespace][$dbKey][] = array(
 549                                                                 'type' => $temp[0],
 550                                                                 'level' => $restriction,
 551                                                                 'expiry' => 'infinity',
 552                                                         );
 553                                                 }
 554                                         }
 555                                 }
 556                         }
 557                 }
 558
 559                 // Get protections for missing titles
 560                 if ( count( $this->missing ) ) {
 561                         $this->resetQueryParams();
 562                         $lb = new LinkBatch( $this->missing );
 563                         $this->addTables( 'protected_titles' );
 564                         $this->addFields( array( 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ) );
 565                         $this->addWhere( $lb->constructSet( 'pt', $db ) );
 566                         $res = $this->select( __METHOD__ );
 567                         foreach ( $res as $row ) {
 568                                 $this->protections[$row->pt_namespace][$row->pt_title][] = array(
 569                                         'type' => 'create',
 570                                         'level' => $row->pt_create_perm,
 571                                         'expiry' => $wgContLang->formatExpiry( $row->pt_expiry, TS_ISO_8601 )
 572                                 );
 573                         }
 574                 }
 575
 576                 // Cascading protections
 577                 $images = $others = array();
 578                 foreach ( $this->everything as $title ) {
 579                         if ( $title->getNamespace() == NS_FILE ) {
 580                                 $images[] = $title->getDBkey();
 581                         } else {
 582                                 $others[] = $title;
 583                         }
 584                 }
 585
 586                 if ( count( $others ) ) {
 587                         // Non-images: check templatelinks
 588                         $lb = new LinkBatch( $others );
 589                         $this->resetQueryParams();
 590                         $this->addTables( array( 'page_restrictions', 'page', 'templatelinks' ) );
 591                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 592                                 'page_title', 'page_namespace',
 593                                 'tl_title', 'tl_namespace' ) );
 594                         $this->addWhere( $lb->constructSet( 'tl', $db ) );
 595                         $this->addWhere( 'pr_page = page_id' );
 596                         $this->addWhere( 'pr_page = tl_from' );
 597                         $this->addWhereFld( 'pr_cascade', 1 );
 598
 599                         $res = $this->select( __METHOD__ );
 600                         foreach ( $res as $row ) {
 601                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 602                                 $this->protections[$row->tl_namespace][$row->tl_title][] = array(
 603                                         'type' => $row->pr_type,
 604                                         'level' => $row->pr_level,
 605                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 606                                         'source' => $source->getPrefixedText()
 607                                 );
 608                         }
 609                 }
 610
 611                 if ( count( $images ) ) {
 612                         // Images: check imagelinks
 613                         $this->resetQueryParams();
 614                         $this->addTables( array( 'page_restrictions', 'page', 'imagelinks' ) );
 615                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 616                                 'page_title', 'page_namespace', 'il_to' ) );
 617                         $this->addWhere( 'pr_page = page_id' );
 618                         $this->addWhere( 'pr_page = il_from' );
 619                         $this->addWhereFld( 'pr_cascade', 1 );
 620                         $this->addWhereFld( 'il_to', $images );
 621
 622                         $res = $this->select( __METHOD__ );
 623                         foreach ( $res as $row ) {
 624                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 625                                 $this->protections[NS_FILE][$row->il_to][] = array(
 626                                         'type' => $row->pr_type,
 627                                         'level' => $row->pr_level,
 628                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 629                                         'source' => $source->getPrefixedText()
 630                                 );
 631                         }
 632                 }
 633         }
 634
 635         /**
 636          * Get talk page IDs (if requested) and subject page IDs (if requested)
 637          * and put them in $talkids and $subjectids
 638          */
 639         private function getTSIDs() {
 640                 $getTitles = $this->talkids = $this->subjectids = array();
 641
 642                 /** @var $t Title */
 643                 foreach ( $this->everything as $t ) {
 644                         if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
 645                                 if ( $this->fld_subjectid ) {
 646                                         $getTitles[] = $t->getSubjectPage();
 647                                 }
 648                         } elseif ( $this->fld_talkid ) {
 649                                 $getTitles[] = $t->getTalkPage();
 650                         }
 651                 }
 652                 if ( !count( $getTitles ) ) {
 653                         return;
 654                 }
 655
 656                 $db = $this->getDB();
 657
 658                 // Construct a custom WHERE clause that matches
 659                 // all titles in $getTitles
 660                 $lb = new LinkBatch( $getTitles );
 661                 $this->resetQueryParams();
 662                 $this->addTables( 'page' );
 663                 $this->addFields( array( 'page_title', 'page_namespace', 'page_id' ) );
 664                 $this->addWhere( $lb->constructSet( 'page', $db ) );
 665                 $res = $this->select( __METHOD__ );
 666                 foreach ( $res as $row ) {
 667                         if ( MWNamespace::isTalk( $row->page_namespace ) ) {
 668                                 $this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
 669                                         intval( $row->page_id );
 670                         } else {
 671                                 $this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
 672                                         intval( $row->page_id );
 673                         }
 674                 }
 675         }
 676
 677         private function getDisplayTitle() {
 678                 $this->displaytitles = array();
 679
 680                 $pageIds = array_keys( $this->titles );
 681
 682                 if ( !count( $pageIds ) ) {
 683                         return;
 684                 }
 685
 686                 $this->resetQueryParams();
 687                 $this->addTables( 'page_props' );
 688                 $this->addFields( array( 'pp_page', 'pp_value' ) );
 689                 $this->addWhereFld( 'pp_page', $pageIds );
 690                 $this->addWhereFld( 'pp_propname', 'displaytitle' );
 691                 $res = $this->select( __METHOD__ );
 692
 693                 foreach ( $res as $row ) {
 694                         $this->displaytitles[$row->pp_page] = $row->pp_value;
 695                 }
 696         }
 697
 698         /**
 699          * Get information about watched status and put it in $this->watched
 700          * and $this->notificationtimestamps
 701          */
 702         private function getWatchedInfo() {
 703                 $user = $this->getUser();
 704
 705                 if ( $user->isAnon() || count( $this->everything ) == 0
 706                         || !$user->isAllowed( 'viewmywatchlist' )
 707                 ) {
 708                         return;
 709                 }
 710
 711                 $this->watched = array();
 712                 $this->notificationtimestamps = array();
 713                 $db = $this->getDB();
 714
 715                 $lb = new LinkBatch( $this->everything );
 716
 717                 $this->resetQueryParams();
 718                 $this->addTables( array( 'watchlist' ) );
 719                 $this->addFields( array( 'wl_title', 'wl_namespace' ) );
 720                 $this->addFieldsIf( 'wl_notificationtimestamp', $this->fld_notificationtimestamp );
 721                 $this->addWhere( array(
 722                         $lb->constructSet( 'wl', $db ),
 723                         'wl_user' => $user->getID()
 724                 ) );
 725
 726                 $res = $this->select( __METHOD__ );
 727
 728                 foreach ( $res as $row ) {
 729                         if ( $this->fld_watched ) {
 730                                 $this->watched[$row->wl_namespace][$row->wl_title] = true;
 731                         }
 732                         if ( $this->fld_notificationtimestamp ) {
 733                                 $this->notificationtimestamps[$row->wl_namespace][$row->wl_title] =
 734                                         $row->wl_notificationtimestamp;
 735                         }
 736                 }
 737         }
 738
 739         /**
 740          * Get the count of watchers and put it in $this->watchers
 741          */
 742         private function getWatcherInfo() {
 743                 if ( count( $this->everything ) == 0 ) {
 744                         return;
 745                 }
 746
 747                 $user = $this->getUser();
 748                 $canUnwatchedpages = $user->isAllowed( 'unwatchedpages' );
 749                 $unwatchedPageThreshold = $this->getConfig()->get( 'UnwatchedPageThreshold' );
 750                 if ( !$canUnwatchedpages && !is_int( $unwatchedPageThreshold ) ) {
 751                         return;
 752                 }
 753
 754                 $this->watchers = array();
 755                 $this->showZeroWatchers = $canUnwatchedpages;
 756                 $db = $this->getDB();
 757
 758                 $lb = new LinkBatch( $this->everything );
 759
 760                 $this->resetQueryParams();
 761                 $this->addTables( array( 'watchlist' ) );
 762                 $this->addFields( array( 'wl_title', 'wl_namespace', 'count' => 'COUNT(*)' ) );
 763                 $this->addWhere( array(
 764                         $lb->constructSet( 'wl', $db )
 765                 ) );
 766                 $this->addOption( 'GROUP BY', array( 'wl_namespace', 'wl_title' ) );
 767                 if ( !$canUnwatchedpages ) {
 768                         $this->addOption( 'HAVING', "COUNT(*) >= $unwatchedPageThreshold" );
 769                 }
 770
 771                 $res = $this->select( __METHOD__ );
 772
 773                 foreach ( $res as $row ) {
 774                         $this->watchers[$row->wl_namespace][$row->wl_title] = (int)$row->count;
 775                 }
 776         }
 777
 778         public function getCacheMode( $params ) {
 779                 $publicProps = array(
 780                         'protection',
 781                         'talkid',
 782                         'subjectid',
 783                         'url',
 784                         'preload',
 785                         'displaytitle',
 786                 );
 787                 if ( !is_null( $params['prop'] ) ) {
 788                         foreach ( $params['prop'] as $prop ) {
 789                                 if ( !in_array( $prop, $publicProps ) ) {
 790                                         return 'private';
 791                                 }
 792                         }
 793                 }
 794                 if ( !is_null( $params['token'] ) ) {
 795                         return 'private';
 796                 }
 797
 798                 return 'public';
 799         }
 800
 801         public function getAllowedParams() {
 802                 return array(
 803                         'prop' => array(
 804                                 ApiBase::PARAM_DFLT => null,
 805                                 ApiBase::PARAM_ISMULTI => true,
 806                                 ApiBase::PARAM_TYPE => array(
 807                                         'protection',
 808                                         'talkid',
 809                                         'watched', # private
 810                                         'watchers', # private
 811                                         'notificationtimestamp', # private
 812                                         'subjectid',
 813                                         'url',
 814                                         'readable', # private
 815                                         'preload',
 816                                         'displaytitle',
 817                                         // If you add more properties here, please consider whether they
 818                                         // need to be added to getCacheMode()
 819                                 ) ),
 820                         'token' => array(
 821                                 ApiBase::PARAM_DEPRECATED => true,
 822                                 ApiBase::PARAM_DFLT => null,
 823                                 ApiBase::PARAM_ISMULTI => true,
 824                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
 825                         ),
 826                         'continue' => null,
 827                 );
 828         }
 829
 830         public function getParamDescription() {
 831                 return array(
 832                         'prop' => array(
 833                                 'Which additional properties to get:',
 834                                 ' protection            - List the protection level of each page',
 835                                 ' talkid                - The page ID of the talk page for each non-talk page',
 836                                 ' watched               - List the watched status of each page',
 837                                 ' watchers              - The number of watchers, if allowed',
 838                                 ' notificationtimestamp - The watchlist notification timestamp of each page',
 839                                 ' subjectid             - The page ID of the parent page for each talk page',
 840                                 ' url                   - Gives a full URL to the page, and also an edit URL',
 841                                 ' readable              - Whether the user can read this page',
 842                                 ' preload               - Gives the text returned by EditFormPreloadText',
 843                                 ' displaytitle          - Gives the way the page title is actually displayed',
 844                         ),
 845                         'token' => 'Request a token to perform a data-modifying action on a page',
 846                         'continue' => 'When more results are available, use this to continue',
 847                 );
 848         }
 849
 850         public function getDescription() {
 851                 return 'Get basic page information such as namespace, title, last touched date, ...';
 852         }
 853
 854         public function getExamples() {
 855                 return array(
 856                         'api.php?action=query&prop=info&titles=Main%20Page',
 857                         'api.php?action=query&prop=info&inprop=protection&titles=Main%20Page'
 858                 );
 859         }
 860
 861         public function getHelpUrls() {
 862                 return 'https://www.mediawiki.org/wiki/API:Properties#info_.2F_in';
 863         }
 864 }