session.php

<?php
namespace Bitrix\Rest\Event;
 
class Session
{
    const PARAM_SESSION = 'EVENT_SESSION';
 
    private static $TTL = null;
 
    private static $ttlDecreased = false;
    private static $set = false;
 
    public static function get()
    {
        if(!self::$set)
        {
            self::$TTL = \CRestUtil::HANDLER_SESSION_TTL;
            self::$ttlDecreased = true;
        }
        else
        {
            if(!self::$ttlDecreased)
            {
                self::$TTL--;
                self::$ttlDecreased = true;
            }
        }
 
        return self::$TTL <= 0 ? false : self::$TTL;
    }
 
    public static function set($session)
    {
        self::$TTL = is_array($session) ? $session['TTL'] : $session;
 
        self::$ttlDecreased = false;
        self::$set = true;
    }
}