public bool TryAddLineItems(Stock s, int amount)
{
bool hasKey = LineItemUnits.ContainsKey(s.Matter);
if ((hasKey && LineItemUnits[s.Matter] + amount > -1) || (!hasKey && amount > -1))
{
if (hasKey)
{
LineItemUnits[s.Matter] += amount;
}
else
{
LineItemUnits[s.Matter] = amount;
}
MatterCost += s.ListPrice * amount;
RecalcVolumeMassShipping();
//validate
if (amount > 0)
{
if (TotalVolume > Via.MaximumVolume() || TotalMass > Via.MaximumMass())
{
TryAddLineItems(s, -amount);
return(false);
}
}
return(true);
}
return(false);
}