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<?php
/**
 * This code is licensed under AGPLv3 license or Afterlogic Software License
 * if commercial version of the product was purchased.
 * For full statements of the licenses see LICENSE-AFTERLOGIC and LICENSE-AGPL3 files.
 */

namespace Afterlogic\DAV;

/**
 * @license https://www.gnu.org/licenses/agpl-3.0.html AGPL-3.0
 * @license https://afterlogic.com/products/common-licensing Afterlogic Software License
 * @copyright Copyright (c) 2019, Afterlogic Corp.
 */
class Utils
{
    public static function getCurrentAccount()
    {
        return \Afterlogic\DAV\Server::getUser();
    }

public static function ValidateClient($sClient)
    {
        $bIsSync = false;

$oServer = \Afterlogic\DAV\Server::getInstance();

$sUserAgent = $oServer->httpRequest->getHeader('user-agent');
        if (isset($sUserAgent) && strpos(strtolower($sUserAgent), 'afterlogic ' . strtolower($sClient)) !== false) {
            $bIsSync = true;
        }

return $bIsSync;
    }
    //GetAccountByLogin
    public static function GetUserByPublicId($sUserName)
    {
        $bPrevState =  \Aurora\System\Api::skipCheckUserRole(true);
        $mResult = \Aurora\System\Api::GetModuleDecorator('Core')->GetUserByPublicId($sUserName);
        \Aurora\System\Api::skipCheckUserRole($bPrevState);

return $mResult;
    }

public static function getPrincipalByEmail($sEmail)
    {
        $sEmail = trim(str_ireplace("mailto:", "", $sEmail));

$aPrincipalsPath = Backend::Principal()->searchPrincipals(
            \rtrim(Constants::PRINCIPALS_PREFIX, '/'),
            array(
                '{http://sabredav.org/ns}email-address' => $sEmail
            )
        );
        if (is_array($aPrincipalsPath) && count($aPrincipalsPath) === 0) {
            $aPrincipalsPath = Backend::Principal()->searchPrincipals(
                \rtrim(Constants::PRINCIPALS_PREFIX, '/'),
                array(
                    '{http://sabredav.org/ns}email-address' => $sEmail
                )
            );
            if (is_array($aPrincipalsPath) && count($aPrincipalsPath) === 0) {
                throw new \Exception("Unknown email address");
            }
        }

$aPrincipals = array_filter(
            $aPrincipalsPath,
            function ($sPrincipalPath) use ($sEmail) {
                return ($sPrincipalPath === \Afterlogic\DAV\Constants::PRINCIPALS_PREFIX . $sEmail);
            }
        );

if (count($aPrincipals) === 0) {
            throw new \Exception("Unknown email address");
        }

return Backend::Principal()->getPrincipalByPath($aPrincipals[0]);
    }
}