public IEnumerable <DenominationModel> Restock(IEnumerable <DenominationModel> stock)
{
lock (_lock)
{
var currentDenoms = GetDenominations().ToDictionary(s => s.Denomination);
foreach (var entry in stock)
{
if (entry.Count < 0)
{
throw new InvalidAtmOperationException($"Denomination {entry.Denomination} can not be stocked with a negative count.");
}
if (currentDenoms.TryGetValue(entry.Denomination, out DenominationModel denom))
{
denom.Count += entry.Count;
}
else
{
throw new InvalidAtmOperationException($"Denomination {entry.Denomination} is not a valid value.");
}
}
var finalDenoms = currentDenoms.Values.ToList();
_dao.Update(finalDenoms);
return(finalDenoms);
}
}