Log::write

static function write($data)
{
	if (!is_array($data['USER_ID']))
	{
		$data['USER_ID'] = [(int)$data['USER_ID']];
	}

	$users = [];
	foreach ($data['USER_ID'] as $uid)
	{
		$uid = (int)$uid;
		if ($uid)
		{
			$users[] = $uid;
		}
	}

	if (empty($users))
	{
		return;
	}

	$action = $data['ACTION']?: 'UNKNOWN';
	$params = $data['PARAMS']?: [];
	$device = $data['DEVICE']?: 'UNKNOWN';

	global $USER;

	if (!in_array((int)$USER->GetID(), $users, true))
	{
		return;
	}

	$logUserId = $USER->GetID();

	$sessionId = BitrixMainApplication::getInstance()->getKernelSession()->getId();
	$logName = md5($sessionId);
	$scriptName = BitrixMainContext::getCurrent()->getServer()->getScriptName();
	$userIp = BitrixMainContext::getCurrent()->getRequest()->getRemoteAddress();
	if ($device === 'UNKNOWN')
	{
		$device = mb_strpos($scriptName, 'desktop_app')? 'DESKTOP' : 'BROWSER';
	}

	$log = "n------------------------n";
	$log .= date("Y.m.d G:i:s")."n";
	$log .= $action.' ['.$device.' - '.$userIp.' :: '.$sessionId."]n";
	$log .= print_r($params, 1);
	$log .= "n------------------------n";

	BitrixMainIOFile::putFileContents($_SERVER["DOCUMENT_ROOT"]."/../logs/im/$logUserId/$logName.log", $log, BitrixMainIOFile::APPEND);
}