CIMRestService::dialogGet

static function dialogGet($arParams, $offset, CRestServer $server)
{
	$arParams = array_change_key_case($arParams, CASE_UPPER);

	if (!BitrixImCommon::isDialogId($arParams['DIALOG_ID']))
	{
		throw new BitrixRestRestException("Dialog ID can't be empty", "DIALOG_ID_EMPTY", CRestServer::STATUS_WRONG_REQUEST);
	}

	if (!BitrixImDialog::hasAccess($arParams['DIALOG_ID']))
	{
		throw new BitrixRestRestException("You do not have access to the specified dialog", "ACCESS_ERROR", CRestServer::STATUS_FORBIDDEN);
	}

	$chatId = BitrixImDialog::getChatId($arParams['DIALOG_ID']);
	if (!$chatId)
	{
		throw new BitrixRestRestException("You don't have access to this chat", "ACCESS_ERROR", CRestServer::STATUS_WRONG_REQUEST);
	}

	$result = BitrixImChat::getById($chatId, ['LOAD_READED' => true, 'JSON' => true]);
	if (!$result)
	{
		throw new BitrixRestRestException("You don't have access to this chat", "ACCESS_ERROR", CRestServer::STATUS_WRONG_REQUEST);
	}

	$result['dialog_id'] = $arParams['DIALOG_ID'];

	return $result;

}