public bool Withdraw(IReadOnlyCashTransaction cashTransaction)
{
bool isValid = true;
foreach (var key in _billInventory.Keys)
{
isValid = isValid && (_billInventory[key] >= cashTransaction.BillCount(key));
if (isValid == false)
{
break;
}
}
// Only set the inventory if the withdraw can happen.
if (isValid == true)
{
foreach (var bill in UnitedStatesTender.GetAllDefinedTenders())
{
if (_billInventory.ContainsKey(bill))
{
_billInventory[bill] = _billInventory[bill] - cashTransaction.BillCount(bill);
}
}
}
return(isValid);
}
public int GetBillCount(UnitedStatesTender tender)
{
if (_billInventory.ContainsKey(tender))
{
return(_billInventory[tender]);
}
return(0);
}
public int BillCount(UnitedStatesTender tender)
{
if (_details.ContainsKey(tender))
{
return(_details[tender]);
}
return(0);
}
public void ResetInventory(IReadOnlyCashTransaction restock)
{
foreach (var key in UnitedStatesTender.GetAllDefinedTenders())
{
if (_billInventory.ContainsKey(key))
{
_billInventory[key] = restock.BillCount(key);
}
}
}
public AtmInventory()
{
_billInventory = new Dictionary <UnitedStatesTender, int>();
var allTenders = UnitedStatesTender.GetAllDefinedTenders();
foreach (var tender in allTenders)
{
_billInventory.Add(tender, 0);
}
}
public CashTransaction Add(UnitedStatesTender tender, int numberOfBills)
{
if (_details.ContainsKey(tender))
{
_details[tender] += numberOfBills;
}
else
{
_details.Add(new KeyValuePair <UnitedStatesTender, int>(tender, numberOfBills));
}
return(this);
}
public static bool TryParse(string amount, out UnitedStatesTender bill)
{
var cleanAmount = amount;
if (cleanAmount.StartsWith('$'))
{
cleanAmount = cleanAmount.Substring(1);
}
if (int.TryParse(cleanAmount, out int tenderValue))
{
var allTenders = GetAllDefinedTenders();
foreach (var tender in allTenders)
{
if (tender.Value == tenderValue)
{
bill = tender;
return(true);
}
}
}
bill = null;
return(false);
}