base.php

<?php
 
namespace Bitrix\Calendar\Core\Oauth;
 
use Bitrix\Main\Engine\UrlManager;
use Bitrix\Main\Loader;
use Bitrix\Main\Security\Random;
use Bitrix\Main\Web\Uri;
 
abstract class Base
{
    protected \CSocServAuth $oauthClient;
 
    protected string $serviceName;
 
    public static function getInstance(): ?static
    {
        if (!Loader::includeModule('socialservices'))
        {
            return null;
        }
 
        if (!$userId = \CCalendar::GetCurUserId())
        {
            return null;
        }
 
        $className = static::class;
 
        $instance = new $className($userId);
 
        if (!$instance->checkService())
        {
            return null;
        }
 
        $instance->serviceName = $className::getServiceName();
 
        return $instance;
    }
 
    abstract protected function __construct($userId);
 
    abstract public function getUrl(): string;
 
    abstract protected function checkService(): bool;
 
 
    abstract public static function getServiceName(): string;
}