Context.php

<?php
 
namespace Bitrix\Im\V2\Service;
 
use Bitrix\Im\V2\Entity\User\User;
 
class Context
{
    protected ?int $actionContextUserId = null;
 
    public function setUser($contextUser): self
    {
        if (is_numeric($contextUser))
        {
            $this->setUserId((int)$contextUser);
        }
        elseif ($contextUser instanceof User)
        {
            $this->setUserId($contextUser->getId());
        }
        elseif ($contextUser === null)
        {
            $this->resetUser();
        }
 
        return $this;
    }
 
    public function setUserId(?int $contextUserId): self
    {
        if (is_numeric($contextUserId))
        {
            $this->actionContextUserId = (int)$contextUserId;
        }
        elseif ($contextUserId === null)
        {
            $this->resetUser();
        }
 
        return $this;
    }
 
    public function resetUser(): self
    {
        $this->actionContextUserId = null;
 
        return $this;
    }
 
    public function getUserId(): int
    {
        global $USER;
        if (
            $this->actionContextUserId === null
            && ($USER instanceof \CUser)
        )
        {
            return (int)$USER->getId();
        }
 
        return (int)$this->actionContextUserId;
    }
 
    public function getUser(): User
    {
        return User::getInstance($this->getUserId());
    }
}