public void SignContract(string firstName, string lastName, int terminalNumber, TariffOption tariffType)
{
if (!_billing.Repository.ContainsKey(terminalNumber))
{
IContract newContract = new Contract(firstName, lastName, terminalNumber, tariffType, DateTime.Now);
ITerminal newTerminal = ProduseTerminal(terminalNumber);
IPort newPort = ProdusePort(newTerminal);
ISubscriberInfo subscriberInfo = CreateSubscriberInfo(tariffType, terminalNumber, newContract);
_billing.AddSubscriberInfo(terminalNumber, subscriberInfo);
_station.AddMapItem(terminalNumber, newPort, newTerminal);
}
else
{
Console.WriteLine("\nThis number alredy used. Please choose another number.\n");
}
}