CIMRestService::chatFileCollectionGet

static function chatFileCollectionGet($arParams, $n, CRestServer $server)
{
	$arParams = array_change_key_case($arParams, CASE_UPPER);
	$filter = [
		'CHAT_ID' => $arParams['CHAT_ID'] ?? null,
	];
	$limit = self::getLimit($arParams);
	if (!isset($filter['CHAT_ID']))
	{
		throw new BitrixRestRestException('CHAT_ID can`t be empty', 'CHAT_ID_EMPTY', CRestServer::STATUS_WRONG_REQUEST);
	}

	$chatId = $filter['CHAT_ID'];
	$chat = BitrixImV2Chat::getInstance($chatId);

	if (!$chat->hasAccess())
	{
		throw new BitrixRestRestException('You do not have access to this chat', BitrixImV2RestRestError::ACCESS_ERROR, CRestServer::STATUS_FORBIDDEN);
	}

	$startId = $chat->getStartId();

	if ($startId > 0)
	{
		$filter['START_ID'] = $startId;
	}

	$files = new BitrixImV2LinkFileFileCollection();

	foreach (BitrixImV2LinkFileFileItem::ALLOWED_SUBTYPE as $subtype)
	{
		$filter['SUBTYPE'] = $subtype;

		$filesBySubtype = BitrixImV2LinkFileFileCollection::find($filter, [], $limit);

		foreach ($filesBySubtype as $fileBySubtype)
		{
			$files[] = $fileBySubtype;
		}
	}

	return (new BitrixImV2RestRestAdapter($files))->toRestFormat();
}