Recent::getUnread

static function getUnread(string $itemType, string $dialogId): array
{
	$id = mb_strpos($dialogId, 'chat') === 0 ? mb_substr($dialogId, 4) : $dialogId;
	$queryResult = BitrixImModelRecentTable::getList([
		'select' => ['USER_ID', 'UNREAD',],
		'filter' => [
			'=ITEM_TYPE' => $itemType,
			'=ITEM_ID' => $id
		]
	])->fetchAll();

	$result = [];

	foreach ($queryResult as $row)
	{
		$result[(int)$row['USER_ID']] = ($row['UNREAD'] ?? 'N') === 'Y';
	}

	return $result;
}