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CheckUserTemporaryAccountsByIPLookup.php
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CheckUserTemporaryAccountsByIPLookup.php
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<?php
namespace MediaWiki\CheckUser\Services;
use MediaWiki\CheckUser\CheckUserQueryInterface;
use MediaWiki\CheckUser\Jobs\LogTemporaryAccountAccessJob;
use MediaWiki\CheckUser\Logging\TemporaryAccountLogger;
use MediaWiki\Config\ServiceOptions;
use MediaWiki\JobQueue\JobQueueGroup;
use MediaWiki\Permissions\Authority;
use MediaWiki\Permissions\PermissionManager;
use MediaWiki\User\Options\UserOptionsLookup;
use MediaWiki\User\TempUser\TempUserConfig;
use MediaWiki\User\UserFactory;
use StatusValue;
use Wikimedia\IPUtils;
use Wikimedia\Rdbms\IConnectionProvider;
use Wikimedia\Rdbms\IExpression;
use Wikimedia\Rdbms\SelectQueryBuilder;
/**
* Given an IP, return every known temporary account that has edited from it.
*
* Note that in WMF production, using this service outside of Extension:CheckUser
* requires consultation with Trust & Safety Product.
*/
class CheckUserTemporaryAccountsByIPLookup implements CheckUserQueryInterface {
public const CONSTRUCTOR_OPTIONS = [
'CheckUserMaximumRowCount'
];
private JobQueueGroup $jobQueueGroup;
private IConnectionProvider $connectionProvider;
private ServiceOptions $serviceOptions;
private TempUserConfig $tempUserConfig;
private UserFactory $userFactory;
private UserOptionsLookup $userOptionsLookup;
private PermissionManager $permissionManager;
public function __construct(
ServiceOptions $serviceOptions,
IConnectionProvider $connectionProvider,
JobQueueGroup $jobQueueGroup,
TempUserConfig $tempUserConfig,
UserFactory $userFactory,
PermissionManager $permissionManager,
UserOptionsLookup $userOptionsLookup
) {
$serviceOptions->assertRequiredOptions( self::CONSTRUCTOR_OPTIONS );
$this->serviceOptions = $serviceOptions;
$this->connectionProvider = $connectionProvider;
$this->jobQueueGroup = $jobQueueGroup;
$this->tempUserConfig = $tempUserConfig;
$this->userFactory = $userFactory;
$this->userOptionsLookup = $userOptionsLookup;
$this->permissionManager = $permissionManager;
}
/**
* @param string $ip The IP address to use in the lookup
* @param Authority $authority The authority making the request
* @param bool $shouldLog Should a log entry be created to show that this data was accessed? By default,
* create a log entry. Classes that extend AbstractTemporaryAccountHandler don't need to set this to true,
* because AbstractTemporaryAccountHandler creates a log entry.
* @param int|null $limit The maximum number of rows to fetch.
* @return StatusValue A good status will have a list of account names or empty list if none were found;
* a bad status will have the relevant permission error encountered
*/
public function get( string $ip, Authority $authority, bool $shouldLog = true, ?int $limit = null ): StatusValue {
// TODO: Use a trait for permissions, to avoid duplication with
// AbstractTemporaryAccountHandler::checkPermissions
$status = $this->checkPermissions( $authority );
if ( !$status->isGood() ) {
return $status;
}
if ( $shouldLog ) {
$this->jobQueueGroup->push(
LogTemporaryAccountAccessJob::newSpec(
$authority->getUser(),
$ip,
TemporaryAccountLogger::ACTION_VIEW_TEMPORARY_ACCOUNTS_ON_IP
)
);
}
// Normalize the IP into the same format that cuc_ip uses
$ip = IPUtils::sanitizeIP( $ip );
// If no limit is supplied, set the default to CheckUserMaximumRowCount.
if ( !$limit ) {
$limit = $this->serviceOptions->get( 'CheckUserMaximumRowCount' );
} else {
// The limit is the smaller of the user-provided limit parameter and the maximum row count.
$limit = min( $limit, $this->serviceOptions->get( 'CheckUserMaximumRowCount' ) );
}
// T327906: 'cuc_timestamp' is selected to satisfy a Postgres requirement
// where all ORDER BY fields must be present in SELECT list.
$dbr = $this->connectionProvider->getReplicaDatabase();
$rows = $dbr->newSelectQueryBuilder()
->fields( [ 'actor_name', 'timestamp' => 'MAX(cuc_timestamp)' ] )
->table( self::CHANGES_TABLE )
->join( 'actor', null, 'actor_id=cuc_actor' )
->where( [ 'cuc_ip' => $ip ] )
->where( $this->tempUserConfig->getMatchCondition( $dbr, 'actor_name', IExpression::LIKE ) )
->groupBy( 'actor_name' )
->orderBy( 'timestamp', SelectQueryBuilder::SORT_DESC )
->limit( $limit )
->caller( __METHOD__ )
->fetchResultSet();
$accounts = [];
$canSeeHidden = $authority->isAllowed( 'hideuser' );
foreach ( $rows as $row ) {
$account = $row->actor_name;
// Don't return hidden accounts to authorities who cannot view them
if ( $canSeeHidden || !$this->userFactory->newFromName( $account )->isHidden() ) {
$accounts[] = $account;
}
}
return StatusValue::newGood( $accounts );
}
private function checkPermissions( Authority $authority ): StatusValue {
if ( !$authority->isNamed() ) {
// n.b. Here and for checkuser-rest-access-denied-blocked-user, the message
// key specifies "REST", but the message is generic enough to reuse in this context.
return StatusValue::newFatal( 'checkuser-rest-access-denied' );
}
if (
!$this->permissionManager->userHasRight(
$authority->getUser(),
'checkuser-temporary-account-no-preference'
) &&
(
!$this->permissionManager->userHasRight(
$authority->getUser(),
'checkuser-temporary-account'
) ||
!$this->userOptionsLookup->getOption(
$authority->getUser(),
'checkuser-temporary-account-enable'
)
)
) {
return StatusValue::newFatal( 'checkuser-rest-access-denied' );
}
if ( $authority->getBlock() ) {
return StatusValue::newFatal( 'checkuser-rest-access-denied-blocked-user' );
}
return StatusValue::newGood();
}
}

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CheckUserTemporaryAccountsByIPLookup.php (5 KB)

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