Issues in ApiQueryInfo.php (master) - Issues in master - wikimedia/mediawiki - Measure and Improve Code Quality continuously with Scrutinizer

Issues (4122)

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Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

Code Injection

Code Injection enables an attacker to execute arbitrary code on the server.

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

Command Injection

Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

Other Vulnerability

This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

includes/api/ApiQueryInfo.php (7 issues)

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<?php
/**
 *
 *
 * Created on Sep 25, 2006
 *
 * Copyright © 2006 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 */
use MediaWiki\MediaWikiServices;
use MediaWiki\Linker\LinkTarget;

/**
 * A query module to show basic page information.
 *
 * @ingroup API
 */
class ApiQueryInfo extends ApiQueryBase {

	private $fld_protection = false, $fld_talkid = false,

		$fld_subjectid = false, $fld_url = false,
		$fld_readable = false, $fld_watched = false,
		$fld_watchers = false, $fld_visitingwatchers = false,
		$fld_notificationtimestamp = false,
		$fld_preload = false, $fld_displaytitle = false;

	private $params;

	/** @var Title[] */
	private $titles;
	/** @var Title[] */
	private $missing;
	/** @var Title[] */
	private $everything;

	private $pageRestrictions, $pageIsRedir, $pageIsNew, $pageTouched,

		$pageLatest, $pageLength;

	private $protections, $restrictionTypes, $watched, $watchers, $visitingwatchers,

		$notificationtimestamps, $talkids, $subjectids, $displaytitles;
	private $showZeroWatchers = false;

	private $tokenFunctions;

	private $countTestedActions = 0;

	public function __construct( ApiQuery $query, $moduleName ) {
		parent::__construct( $query, $moduleName, 'in' );
	}

	/**
	 * @param ApiPageSet $pageSet
	 * @return void
	 */
	public function requestExtraData( $pageSet ) {
		$pageSet->requestField( 'page_restrictions' );
		// If the pageset is resolving redirects we won't get page_is_redirect.
		// But we can't know for sure until the pageset is executed (revids may
		// turn it off), so request it unconditionally.
		$pageSet->requestField( 'page_is_redirect' );
		$pageSet->requestField( 'page_is_new' );
		$config = $this->getConfig();
		$pageSet->requestField( 'page_touched' );
		$pageSet->requestField( 'page_latest' );
		$pageSet->requestField( 'page_len' );
		if ( $config->get( 'ContentHandlerUseDB' ) ) {
			$pageSet->requestField( 'page_content_model' );
		}
		if ( $config->get( 'PageLanguageUseDB' ) ) {
			$pageSet->requestField( 'page_lang' );
		}
	}

	/**
	 * Get an array mapping token names to their handler functions.
	 * The prototype for a token function is func($pageid, $title)
	 * it should return a token or false (permission denied)
	 * @deprecated since 1.24
	 * @return array [ tokenname => function ]
	 */
	protected function getTokenFunctions() {
		// Don't call the hooks twice
		if ( isset( $this->tokenFunctions ) ) {
			return $this->tokenFunctions;
		}

		// If we're in a mode that breaks the same-origin policy, no tokens can
		// be obtained
		if ( $this->lacksSameOriginSecurity() ) {
			return [];
		}

		$this->tokenFunctions = [
			'edit' => [ 'ApiQueryInfo', 'getEditToken' ],
			'delete' => [ 'ApiQueryInfo', 'getDeleteToken' ],
			'protect' => [ 'ApiQueryInfo', 'getProtectToken' ],
			'move' => [ 'ApiQueryInfo', 'getMoveToken' ],
			'block' => [ 'ApiQueryInfo', 'getBlockToken' ],
			'unblock' => [ 'ApiQueryInfo', 'getUnblockToken' ],
			'email' => [ 'ApiQueryInfo', 'getEmailToken' ],
			'import' => [ 'ApiQueryInfo', 'getImportToken' ],
			'watch' => [ 'ApiQueryInfo', 'getWatchToken' ],
		];
		Hooks::run( 'APIQueryInfoTokens', [ &$this->tokenFunctions ] );

		return $this->tokenFunctions;
	}

	static protected $cachedTokens = [];

	/**
	 * @deprecated since 1.24
	 */
	public static function resetTokenCache() {
		ApiQueryInfo::$cachedTokens = [];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getEditToken( $pageid, $title ) {
		// We could check for $title->userCan('edit') here,
		// but that's too expensive for this purpose
		// and would break caching
		global $wgUser;
		if ( !$wgUser->isAllowed( 'edit' ) ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['edit'] ) ) {
			ApiQueryInfo::$cachedTokens['edit'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['edit'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getDeleteToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isAllowed( 'delete' ) ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['delete'] ) ) {
			ApiQueryInfo::$cachedTokens['delete'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['delete'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getProtectToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isAllowed( 'protect' ) ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['protect'] ) ) {
			ApiQueryInfo::$cachedTokens['protect'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['protect'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getMoveToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isAllowed( 'move' ) ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['move'] ) ) {
			ApiQueryInfo::$cachedTokens['move'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['move'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getBlockToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isAllowed( 'block' ) ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['block'] ) ) {
			ApiQueryInfo::$cachedTokens['block'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['block'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getUnblockToken( $pageid, $title ) {
		// Currently, this is exactly the same as the block token
		return self::getBlockToken( $pageid, $title );
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getEmailToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailuser() ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['email'] ) ) {
			ApiQueryInfo::$cachedTokens['email'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['email'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getImportToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isAllowedAny( 'import', 'importupload' ) ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['import'] ) ) {
			ApiQueryInfo::$cachedTokens['import'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['import'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getWatchToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isLoggedIn() ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['watch'] ) ) {
			ApiQueryInfo::$cachedTokens['watch'] = $wgUser->getEditToken( 'watch' );
		}

		return ApiQueryInfo::$cachedTokens['watch'];
	}

	/**
	 * @deprecated since 1.24
	 */
	public static function getOptionsToken( $pageid, $title ) {
		global $wgUser;
		if ( !$wgUser->isLoggedIn() ) {
			return false;
		}

		// The token is always the same, let's exploit that
		if ( !isset( ApiQueryInfo::$cachedTokens['options'] ) ) {
			ApiQueryInfo::$cachedTokens['options'] = $wgUser->getEditToken();
		}

		return ApiQueryInfo::$cachedTokens['options'];
	}

	public function execute() {
		$this->params = $this->extractRequestParams();
		if ( !is_null( $this->params['prop'] ) ) {
			$prop = array_flip( $this->params['prop'] );
			$this->fld_protection = isset( $prop['protection'] );
			$this->fld_watched = isset( $prop['watched'] );
			$this->fld_watchers = isset( $prop['watchers'] );
			$this->fld_visitingwatchers = isset( $prop['visitingwatchers'] );
			$this->fld_notificationtimestamp = isset( $prop['notificationtimestamp'] );
			$this->fld_talkid = isset( $prop['talkid'] );
			$this->fld_subjectid = isset( $prop['subjectid'] );
			$this->fld_url = isset( $prop['url'] );
			$this->fld_readable = isset( $prop['readable'] );
			$this->fld_preload = isset( $prop['preload'] );
			$this->fld_displaytitle = isset( $prop['displaytitle'] );
		}

		$pageSet = $this->getPageSet();
		$this->titles = $pageSet->getGoodTitles();
		$this->missing = $pageSet->getMissingTitles();
		$this->everything = $this->titles + $this->missing;
		$result = $this->getResult();

		uasort( $this->everything, [ 'Title', 'compare' ] );
		if ( !is_null( $this->params['continue'] ) ) {
			// Throw away any titles we're gonna skip so they don't
			// clutter queries
			$cont = explode( '|', $this->params['continue'] );
			$this->dieContinueUsageIf( count( $cont ) != 2 );
			$conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
			foreach ( $this->everything as $pageid => $title ) {
				if ( Title::compare( $title, $conttitle ) >= 0 ) {
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
					break;
				}
				unset( $this->titles[$pageid] );
				unset( $this->missing[$pageid] );
				unset( $this->everything[$pageid] );
			}
		}

		$this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
		// when resolving redirects, no page will have this field
		$this->pageIsRedir = !$pageSet->isResolvingRedirects()
			? $pageSet->getCustomField( 'page_is_redirect' )
			: [];
		$this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );

		$this->pageTouched = $pageSet->getCustomField( 'page_touched' );
		$this->pageLatest = $pageSet->getCustomField( 'page_latest' );
		$this->pageLength = $pageSet->getCustomField( 'page_len' );

		// Get protection info if requested
		if ( $this->fld_protection ) {
			$this->getProtectionInfo();
		}

		if ( $this->fld_watched || $this->fld_notificationtimestamp ) {
			$this->getWatchedInfo();
		}

		if ( $this->fld_watchers ) {
			$this->getWatcherInfo();
		}

		if ( $this->fld_visitingwatchers ) {
			$this->getVisitingWatcherInfo();
		}

		// Run the talkid/subjectid query if requested
		if ( $this->fld_talkid || $this->fld_subjectid ) {
			$this->getTSIDs();
		}

		if ( $this->fld_displaytitle ) {
			$this->getDisplayTitle();
		}

		/** @var $title Title */
		foreach ( $this->everything as $pageid => $title ) {
			$pageInfo = $this->extractPageInfo( $pageid, $title );
			$fit = $pageInfo !== null && $result->addValue( [
				'query',
				'pages'
			], $pageid, $pageInfo );
			if ( !$fit ) {
				$this->setContinueEnumParameter( 'continue',
					$title->getNamespace() . '|' .
					$title->getText() );
				break;
			}
		}
	}

	/**
	 * Get a result array with information about a title
	 * @param int $pageid Page ID (negative for missing titles)
	 * @param Title $title
	 * @return array|null
	 */
	private function extractPageInfo( $pageid, $title ) {
		$pageInfo = [];
		// $title->exists() needs pageid, which is not set for all title objects
		$titleExists = $pageid > 0;
		$ns = $title->getNamespace();
		$dbkey = $title->getDBkey();

		$pageInfo['contentmodel'] = $title->getContentModel();

		$pageLanguage = $title->getPageLanguage();
		$pageInfo['pagelanguage'] = $pageLanguage->getCode();
		$pageInfo['pagelanguagehtmlcode'] = $pageLanguage->getHtmlCode();
		$pageInfo['pagelanguagedir'] = $pageLanguage->getDir();

		if ( $titleExists ) {
			$pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
			$pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
			$pageInfo['length'] = intval( $this->pageLength[$pageid] );

			if ( isset( $this->pageIsRedir[$pageid] ) && $this->pageIsRedir[$pageid] ) {
				$pageInfo['redirect'] = true;
			}
			if ( $this->pageIsNew[$pageid] ) {
				$pageInfo['new'] = true;
			}
		}

		if ( !is_null( $this->params['token'] ) ) {
			$tokenFunctions = $this->getTokenFunctions();
			$pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
			foreach ( $this->params['token'] as $t ) {
				$val = call_user_func( $tokenFunctions[$t], $pageid, $title );
				if ( $val === false ) {
					$this->setWarning( "Action '$t' is not allowed for the current user" );
				} else {
					$pageInfo[$t . 'token'] = $val;
				}
			}
		}

		if ( $this->fld_protection ) {
			$pageInfo['protection'] = [];
			if ( isset( $this->protections[$ns][$dbkey] ) ) {
				$pageInfo['protection'] =
					$this->protections[$ns][$dbkey];
			}
			ApiResult::setIndexedTagName( $pageInfo['protection'], 'pr' );

			$pageInfo['restrictiontypes'] = [];
			if ( isset( $this->restrictionTypes[$ns][$dbkey] ) ) {
				$pageInfo['restrictiontypes'] =
					$this->restrictionTypes[$ns][$dbkey];
			}
			ApiResult::setIndexedTagName( $pageInfo['restrictiontypes'], 'rt' );
		}

		if ( $this->fld_watched && $this->watched !== null ) {
			$pageInfo['watched'] = $this->watched[$ns][$dbkey];
		}

		if ( $this->fld_watchers ) {
			if ( $this->watchers !== null && $this->watchers[$ns][$dbkey] !== 0 ) {
				$pageInfo['watchers'] = $this->watchers[$ns][$dbkey];
			} elseif ( $this->showZeroWatchers ) {
				$pageInfo['watchers'] = 0;
			}
		}

		if ( $this->fld_visitingwatchers ) {
			if ( $this->visitingwatchers !== null && $this->visitingwatchers[$ns][$dbkey] !== 0 ) {
				$pageInfo['visitingwatchers'] = $this->visitingwatchers[$ns][$dbkey];
			} elseif ( $this->showZeroWatchers ) {
				$pageInfo['visitingwatchers'] = 0;
			}
		}

		if ( $this->fld_notificationtimestamp ) {
			$pageInfo['notificationtimestamp'] = '';
			if ( $this->notificationtimestamps[$ns][$dbkey] ) {
				$pageInfo['notificationtimestamp'] =
					wfTimestamp( TS_ISO_8601, $this->notificationtimestamps[$ns][$dbkey] );
			}
		}

		if ( $this->fld_talkid && isset( $this->talkids[$ns][$dbkey] ) ) {
			$pageInfo['talkid'] = $this->talkids[$ns][$dbkey];
		}

		if ( $this->fld_subjectid && isset( $this->subjectids[$ns][$dbkey] ) ) {
			$pageInfo['subjectid'] = $this->subjectids[$ns][$dbkey];
		}

		if ( $this->fld_url ) {
			$pageInfo['fullurl'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
			$pageInfo['editurl'] = wfExpandUrl( $title->getFullURL( 'action=edit' ), PROTO_CURRENT );
			$pageInfo['canonicalurl'] = wfExpandUrl( $title->getFullURL(), PROTO_CANONICAL );
		}
		if ( $this->fld_readable ) {
			$pageInfo['readable'] = $title->userCan( 'read', $this->getUser() );
		}

		if ( $this->fld_preload ) {
			if ( $titleExists ) {
				$pageInfo['preload'] = '';
			} else {
				$text = null;
				Hooks::run( 'EditFormPreloadText', [ &$text, &$title ] );

				$pageInfo['preload'] = $text;
			}
		}

		if ( $this->fld_displaytitle ) {
			if ( isset( $this->displaytitles[$pageid] ) ) {
				$pageInfo['displaytitle'] = $this->displaytitles[$pageid];
			} else {
				$pageInfo['displaytitle'] = $title->getPrefixedText();
			}
		}

		if ( $this->params['testactions'] ) {
			$limit = $this->getMain()->canApiHighLimits() ? self::LIMIT_SML1 : self::LIMIT_SML2;
			if ( $this->countTestedActions >= $limit ) {
				return null; // force a continuation
			}

			$user = $this->getUser();
			$pageInfo['actions'] = [];
			foreach ( $this->params['testactions'] as $action ) {
				$this->countTestedActions++;
				$pageInfo['actions'][$action] = $title->userCan( $action, $user );
			}
		}

		return $pageInfo;
	}

	/**
	 * Get information about protections and put it in $protections
	 */
	private function getProtectionInfo() {
		global $wgContLang;
		$this->protections = [];
		$db = $this->getDB();

		// Get normal protections for existing titles
		if ( count( $this->titles ) ) {
			$this->resetQueryParams();
			$this->addTables( 'page_restrictions' );
			$this->addFields( [ 'pr_page', 'pr_type', 'pr_level',
				'pr_expiry', 'pr_cascade' ] );
			$this->addWhereFld( 'pr_page', array_keys( $this->titles ) );

			$res = $this->select( __METHOD__ );
			foreach ( $res as $row ) {
				/** @var $title Title */
				$title = $this->titles[$row->pr_page];
				$a = [
					'type' => $row->pr_type,
					'level' => $row->pr_level,
					'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 )
				];
				if ( $row->pr_cascade ) {
					$a['cascade'] = true;
				}
				$this->protections[$title->getNamespace()][$title->getDBkey()][] = $a;
			}
			// Also check old restrictions
			foreach ( $this->titles as $pageId => $title ) {
				if ( $this->pageRestrictions[$pageId] ) {
					$namespace = $title->getNamespace();
					$dbKey = $title->getDBkey();
					$restrictions = explode( ':', trim( $this->pageRestrictions[$pageId] ) );
					foreach ( $restrictions as $restrict ) {
						$temp = explode( '=', trim( $restrict ) );
						if ( count( $temp ) == 1 ) {
							// old old format should be treated as edit/move restriction
							$restriction = trim( $temp[0] );

							if ( $restriction == '' ) {
								continue;
							}
							$this->protections[$namespace][$dbKey][] = [
								'type' => 'edit',
								'level' => $restriction,
								'expiry' => 'infinity',
							];
							$this->protections[$namespace][$dbKey][] = [
								'type' => 'move',
								'level' => $restriction,
								'expiry' => 'infinity',
							];
						} else {
							$restriction = trim( $temp[1] );
							if ( $restriction == '' ) {
								continue;
							}
							$this->protections[$namespace][$dbKey][] = [
								'type' => $temp[0],
								'level' => $restriction,
								'expiry' => 'infinity',
							];
						}
					}
				}
			}
		}

		// Get protections for missing titles
		if ( count( $this->missing ) ) {
			$this->resetQueryParams();
			$lb = new LinkBatch( $this->missing );
			$this->addTables( 'protected_titles' );
			$this->addFields( [ 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ] );
			$this->addWhere( $lb->constructSet( 'pt', $db ) );

			$res = $this->select( __METHOD__ );
			foreach ( $res as $row ) {
				$this->protections[$row->pt_namespace][$row->pt_title][] = [
					'type' => 'create',
					'level' => $row->pt_create_perm,
					'expiry' => $wgContLang->formatExpiry( $row->pt_expiry, TS_ISO_8601 )
				];
			}
		}

		// Separate good and missing titles into files and other pages
		// and populate $this->restrictionTypes
		$images = $others = [];
		foreach ( $this->everything as $title ) {
			if ( $title->getNamespace() == NS_FILE ) {
				$images[] = $title->getDBkey();
			} else {
				$others[] = $title;
			}
			// Applicable protection types
			$this->restrictionTypes[$title->getNamespace()][$title->getDBkey()] =
				array_values( $title->getRestrictionTypes() );
		}

		if ( count( $others ) ) {
			// Non-images: check templatelinks
			$lb = new LinkBatch( $others );
			$this->resetQueryParams();
			$this->addTables( [ 'page_restrictions', 'page', 'templatelinks' ] );
			$this->addFields( [ 'pr_type', 'pr_level', 'pr_expiry',
				'page_title', 'page_namespace',
				'tl_title', 'tl_namespace' ] );
			$this->addWhere( $lb->constructSet( 'tl', $db ) );

			$this->addWhere( 'pr_page = page_id' );
			$this->addWhere( 'pr_page = tl_from' );
			$this->addWhereFld( 'pr_cascade', 1 );

			$res = $this->select( __METHOD__ );
			foreach ( $res as $row ) {
				$source = Title::makeTitle( $row->page_namespace, $row->page_title );
				$this->protections[$row->tl_namespace][$row->tl_title][] = [
					'type' => $row->pr_type,
					'level' => $row->pr_level,
					'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
					'source' => $source->getPrefixedText()
				];
			}
		}

		if ( count( $images ) ) {
			// Images: check imagelinks
			$this->resetQueryParams();
			$this->addTables( [ 'page_restrictions', 'page', 'imagelinks' ] );
			$this->addFields( [ 'pr_type', 'pr_level', 'pr_expiry',
				'page_title', 'page_namespace', 'il_to' ] );
			$this->addWhere( 'pr_page = page_id' );
			$this->addWhere( 'pr_page = il_from' );
			$this->addWhereFld( 'pr_cascade', 1 );
			$this->addWhereFld( 'il_to', $images );

			$res = $this->select( __METHOD__ );
			foreach ( $res as $row ) {
				$source = Title::makeTitle( $row->page_namespace, $row->page_title );
				$this->protections[NS_FILE][$row->il_to][] = [
					'type' => $row->pr_type,
					'level' => $row->pr_level,
					'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
					'source' => $source->getPrefixedText()
				];
			}
		}
	}

	/**
	 * Get talk page IDs (if requested) and subject page IDs (if requested)
	 * and put them in $talkids and $subjectids
	 */
	private function getTSIDs() {
		$getTitles = $this->talkids = $this->subjectids = [];

		/** @var $t Title */
		foreach ( $this->everything as $t ) {
			if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
				if ( $this->fld_subjectid ) {
					$getTitles[] = $t->getSubjectPage();
				}
			} elseif ( $this->fld_talkid ) {
				$getTitles[] = $t->getTalkPage();
			}
		}
		if ( !count( $getTitles ) ) {
			return;
		}

		$db = $this->getDB();

		// Construct a custom WHERE clause that matches
		// all titles in $getTitles
		$lb = new LinkBatch( $getTitles );
		$this->resetQueryParams();
		$this->addTables( 'page' );
		$this->addFields( [ 'page_title', 'page_namespace', 'page_id' ] );
		$this->addWhere( $lb->constructSet( 'page', $db ) );

		$res = $this->select( __METHOD__ );
		foreach ( $res as $row ) {
			if ( MWNamespace::isTalk( $row->page_namespace ) ) {
				$this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
					intval( $row->page_id );
			} else {
				$this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
					intval( $row->page_id );
			}
		}
	}

	private function getDisplayTitle() {
		$this->displaytitles = [];

		$pageIds = array_keys( $this->titles );

		if ( !count( $pageIds ) ) {
			return;
		}

		$this->resetQueryParams();
		$this->addTables( 'page_props' );
		$this->addFields( [ 'pp_page', 'pp_value' ] );
		$this->addWhereFld( 'pp_page', $pageIds );
		$this->addWhereFld( 'pp_propname', 'displaytitle' );
		$res = $this->select( __METHOD__ );

		foreach ( $res as $row ) {
			$this->displaytitles[$row->pp_page] = $row->pp_value;
		}
	}

	/**
	 * Get information about watched status and put it in $this->watched
	 * and $this->notificationtimestamps
	 */
	private function getWatchedInfo() {
		$user = $this->getUser();

		if ( $user->isAnon() || count( $this->everything ) == 0
			|| !$user->isAllowed( 'viewmywatchlist' )
		) {
			return;
		}

		$this->watched = [];
		$this->notificationtimestamps = [];

		$store = MediaWikiServices::getInstance()->getWatchedItemStore();
		$timestamps = $store->getNotificationTimestampsBatch( $user, $this->everything );

		if ( $this->fld_watched ) {
			foreach ( $timestamps as $namespaceId => $dbKeys ) {
				$this->watched[$namespaceId] = array_map(
					function( $x ) {
						return $x !== false;
					},
					$dbKeys
				);
			}
		}
		if ( $this->fld_notificationtimestamp ) {
			$this->notificationtimestamps = $timestamps;
		}
	}

	/**
	 * Get the count of watchers and put it in $this->watchers
	 */
	private function getWatcherInfo() {
		if ( count( $this->everything ) == 0 ) {
			return;
		}

		$user = $this->getUser();
		$canUnwatchedpages = $user->isAllowed( 'unwatchedpages' );
		$unwatchedPageThreshold = $this->getConfig()->get( 'UnwatchedPageThreshold' );
		if ( !$canUnwatchedpages && !is_int( $unwatchedPageThreshold ) ) {
			return;
		}

		$this->showZeroWatchers = $canUnwatchedpages;

		$countOptions = [];
		if ( !$canUnwatchedpages ) {
			$countOptions['minimumWatchers'] = $unwatchedPageThreshold;
		}

		$this->watchers = MediaWikiServices::getInstance()->getWatchedItemStore()->countWatchersMultiple(
			$this->everything,
			$countOptions
		);
	}

	/**
	 * Get the count of watchers who have visited recent edits and put it in
	 * $this->visitingwatchers
	 *
	 * Based on InfoAction::pageCounts
	 */
	private function getVisitingWatcherInfo() {
		$config = $this->getConfig();
		$user = $this->getUser();
		$db = $this->getDB();

		$canUnwatchedpages = $user->isAllowed( 'unwatchedpages' );
		$unwatchedPageThreshold = $this->getConfig()->get( 'UnwatchedPageThreshold' );
		if ( !$canUnwatchedpages && !is_int( $unwatchedPageThreshold ) ) {
			return;
		}

		$this->showZeroWatchers = $canUnwatchedpages;

		$titlesWithThresholds = [];
		if ( $this->titles ) {
			$lb = new LinkBatch( $this->titles );

			// Fetch last edit timestamps for pages
			$this->resetQueryParams();
			$this->addTables( [ 'page', 'revision' ] );
			$this->addFields( [ 'page_namespace', 'page_title', 'rev_timestamp' ] );
			$this->addWhere( [
				'page_latest = rev_id',
				$lb->constructSet( 'page', $db ),
			] );
			$this->addOption( 'GROUP BY', [ 'page_namespace', 'page_title' ] );
			$timestampRes = $this->select( __METHOD__ );

			$age = $config->get( 'WatchersMaxAge' );
			$timestamps = [];
			foreach ( $timestampRes as $row ) {
				$revTimestamp = wfTimestamp( TS_UNIX, (int)$row->rev_timestamp );
				$timestamps[$row->page_namespace][$row->page_title] = $revTimestamp - $age;
			}
			$titlesWithThresholds = array_map(
				function( LinkTarget $target ) use ( $timestamps ) {
					return [
						$target, $timestamps[$target->getNamespace()][$target->getDBkey()]
					];
				},
				$this->titles
			);
		}

		if ( $this->missing ) {
			$titlesWithThresholds = array_merge(
				$titlesWithThresholds,
				array_map(
					function( LinkTarget $target ) {
						return [ $target, null ];
					},
					$this->missing
				)
			);
		}
		$store = MediaWikiServices::getInstance()->getWatchedItemStore();
		$this->visitingwatchers = $store->countVisitingWatchersMultiple(
			$titlesWithThresholds,
			!$canUnwatchedpages ? $unwatchedPageThreshold : null
		);
	}

	public function getCacheMode( $params ) {
		// Other props depend on something about the current user
		$publicProps = [
			'protection',
			'talkid',
			'subjectid',
			'url',
			'preload',
			'displaytitle',
		];
		if ( array_diff( (array)$params['prop'], $publicProps ) ) {
			return 'private';
		}

		// testactions also depends on the current user
		if ( $params['testactions'] ) {
			return 'private';
		}

		if ( !is_null( $params['token'] ) ) {
			return 'private';
		}

		return 'public';
	}

	public function getAllowedParams() {
		return [
			'prop' => [
				ApiBase::PARAM_ISMULTI => true,
				ApiBase::PARAM_TYPE => [
					'protection',
					'talkid',
					'watched', # private
					'watchers', # private
					'visitingwatchers', # private
					'notificationtimestamp', # private
					'subjectid',
					'url',
					'readable', # private
					'preload',
					'displaytitle',
					// If you add more properties here, please consider whether they
					// need to be added to getCacheMode()
				],
				ApiBase::PARAM_HELP_MSG_PER_VALUE => [],
			],
			'testactions' => [
				ApiBase::PARAM_TYPE => 'string',
				ApiBase::PARAM_ISMULTI => true,
			],
			'token' => [
				ApiBase::PARAM_DEPRECATED => true,
				ApiBase::PARAM_ISMULTI => true,
				ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
			],
			'continue' => [
				ApiBase::PARAM_HELP_MSG => 'api-help-param-continue',
			],
		];
	}

	protected function getExamplesMessages() {
		return [
			'action=query&prop=info&titles=Main%20Page'
				=> 'apihelp-query+info-example-simple',
			'action=query&prop=info&inprop=protection&titles=Main%20Page'
				=> 'apihelp-query+info-example-protection',
		];
	}

	public function getHelpUrls() {
		return 'https://www.mediawiki.org/wiki/API:Info';
	}
}


wikimedia / mediawiki

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