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<?php
/**
* Caches current user names and other info based on user IDs.
*
* 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
* @ingroup Cache
*/
namespace MediaWiki\Cache;
use MediaWiki\MediaWikiServices;
use Psr\Log\LoggerInterface;
use Wikimedia\Rdbms\IConnectionProvider;
/**
* @since 1.20
* @deprecated since 1.43, use ActorStore
*/
class UserCache {
/** @var array (uid => property => value) */
protected $cache = [];
/** @var array (uid => cache type => 1) */
protected $typesCached = [];
/** @var LoggerInterface */
private $logger;
/** @var LinkBatchFactory */
private $linkBatchFactory;
/** @var IConnectionProvider */
private $dbProvider;
/**
* @deprecated since 1.43, use MediaWikiServices::getInstance()->getUserCache()
* @return UserCache
*/
public static function singleton() {
wfDeprecated( __METHOD__, '1.43' );
return MediaWikiServices::getInstance()->getUserCache();
}
/**
* Uses dependency injection since 1.36
*
* @param LoggerInterface $logger
* @param IConnectionProvider $dbProvider
* @param LinkBatchFactory $linkBatchFactory
*/
public function __construct(
LoggerInterface $logger,
IConnectionProvider $dbProvider,
LinkBatchFactory $linkBatchFactory
) {
$this->logger = $logger;
$this->dbProvider = $dbProvider;
$this->linkBatchFactory = $linkBatchFactory;
}
/**
* Get a property of a user based on their user ID
*
* @param int $userId
* @param string $prop User property
* @return mixed|false The property or false if the user does not exist
*/
public function getProp( $userId, $prop ) {
if ( !isset( $this->cache[$userId][$prop] ) ) {
$this->logger->debug(
'Querying DB for prop {prop} for user ID {userId}',
[
'prop' => $prop,
'userId' => $userId,
]
);
$this->doQuery( [ $userId ] ); // cache miss
}
return $this->cache[$userId][$prop] ?? false; // user does not exist?
}
/**
* Get the name of a user or return $ip if the user ID is 0
*
* @param int $userId
* @param string $ip
* @return string
* @since 1.22
*/
public function getUserName( $userId, $ip ) {
return $userId > 0 ? $this->getProp( $userId, 'name' ) : $ip;
}
/**
* Preloads user names for given list of users.
* @param array $userIds List of user IDs
* @param array $options Option flags; include 'userpage' and 'usertalk'
* @param string $caller The calling method
*/
public function doQuery( array $userIds, $options = [], $caller = '' ) {
$usersToCheck = [];
$usersToQuery = [];
$userIds = array_unique( $userIds );
foreach ( $userIds as $userId ) {
$userId = (int)$userId;
if ( $userId <= 0 ) {
continue; // skip anons
}
if ( isset( $this->cache[$userId]['name'] ) ) {
$usersToCheck[$userId] = $this->cache[$userId]['name']; // already have name
} else {
$usersToQuery[] = $userId; // we need to get the name
}
}
// Lookup basic info for users not yet loaded...
if ( count( $usersToQuery ) ) {
$dbr = $this->dbProvider->getReplicaDatabase();
$queryBuilder = $dbr->newSelectQueryBuilder()
->select( [ 'user_name', 'user_real_name', 'user_registration', 'user_id', 'actor_id' ] )
->from( 'user' )
->join( 'actor', null, 'actor_user = user_id' )
->where( [ 'user_id' => $usersToQuery ] );
$comment = __METHOD__;
if ( strval( $caller ) !== '' ) {
$comment .= "/$caller";
}
$res = $queryBuilder->caller( $comment )->fetchResultSet();
foreach ( $res as $row ) { // load each user into cache
$userId = (int)$row->user_id;
$this->cache[$userId]['name'] = $row->user_name;
$this->cache[$userId]['real_name'] = $row->user_real_name;
$this->cache[$userId]['registration'] = $row->user_registration;
$this->cache[$userId]['actor'] = $row->actor_id;
$usersToCheck[$userId] = $row->user_name;
}
}
$lb = $this->linkBatchFactory->newLinkBatch()
->setCaller( __METHOD__ );
foreach ( $usersToCheck as $userId => $name ) {
if ( $this->queryNeeded( $userId, 'userpage', $options ) ) {
$lb->add( NS_USER, $name );
$this->typesCached[$userId]['userpage'] = 1;
}
if ( $this->queryNeeded( $userId, 'usertalk', $options ) ) {
$lb->add( NS_USER_TALK, $name );
$this->typesCached[$userId]['usertalk'] = 1;
}
}
$lb->execute();
}
/**
* Check if a cache type is in $options and was not loaded for this user
*
* @param int $uid User ID
* @param string $type Cache type
* @param array $options Requested cache types
* @return bool
*/
protected function queryNeeded( $uid, $type, array $options ) {
return ( in_array( $type, $options ) && !isset( $this->typesCached[$uid][$type] ) );
}
}
/** @deprecated class alias since 1.42 */
class_alias( UserCache::class, 'UserCache' );