provider.php

<?php
namespace Bitrix\Rest\OAuth;
 
 
use Bitrix\Rest\AuthProviderInterface;
use Bitrix\Rest\Event\Session;
use Bitrix\Rest\OAuthService;
use Bitrix\Main\Type\DateTime;
 
class Provider implements AuthProviderInterface
{
    protected static $instance = null;
 
    public static function instance()
    {
        if(static::$instance === null)
        {
            static::$instance = new static();
        }
 
        return static::$instance;
    }
 
    public function authorizeClient($clientId, $userId, $state = '')
    {
        if($userId > 0)
        {
            $additionalParams = $this->getTokenParams(array(), $userId);
 
            $client = $this->getClient();
            $codeInfo = $client->getCode($clientId, $state, $additionalParams);
 
            if($codeInfo['result'])
            {
                return $codeInfo['result'];
            }
            else
            {
                return $codeInfo;
            }
        }
 
        return false;
    }
 
    public function get($clientId, $scope, $additionalParams, $userId)
    {
        if($userId > 0)
        {
            $additionalParams = $this->getTokenParams($additionalParams, $userId);
 
            $client = $this->getClient();
            $authResult = $client->getAuth($clientId, $scope, $additionalParams);
 
            if($authResult['result'])
            {
                if($authResult['result']['access_token'])
                {
                    $authResult['result']['user_id'] = $userId;
                    $authResult['result']['client_id'] = $clientId;
 
                    Auth::storeRegisteredAuth($authResult['result']);
                }
 
                if (!empty($authResult['result']['date_finish_format']))
                {
                    $dateFinish = new DateTime($authResult['result']['date_finish_format'], DATE_ATOM);
                    $authResult['result']['date_finish'] = $dateFinish->getTimestamp();
                }
 
                return $authResult['result'];
            }
            else
            {
                return $authResult;
            }
        }
 
        return false;
    }
 
    protected function getClient()
    {
        return OAuthService::getEngine()->getClient();
    }
 
    protected function getTokenParams($additionalParams, $userId)
    {
        if(!is_array($additionalParams))
        {
            $additionalParams = array();
        }
 
        $additionalParams[Auth::PARAM_LOCAL_USER] = $userId;
        $additionalParams[Auth::PARAM_TZ_OFFSET] = \CTimeZone::getOffset();
        $additionalParams[Session::PARAM_SESSION] = Session::get();
 
        return $additionalParams;
    }
}