private void UpdateOrderLine(ProductOption option, int quantity, bool absolute)
{
var line = _lines.FirstOrDefault(l => l.ProductOption.SKU == option.SKU);
if (line == null && quantity > 0)
{
_lines.Add(_factory.CreateOrderLine(option, quantity));
}
else
{
if (!absolute)
{
quantity += line.Quantity;
}
if (quantity <= 0)
{
_lines.Remove(line);
}
else
{
line.UpdateQuantity(quantity);
}
}
}
public void AddOption(ProductOption option)
{
_options.Add(option);
}
public void UpdateItem(ProductOption option, int quantity)
{
UpdateOrderLine(option, quantity, true);
}
public void RemoveItem(ProductOption option)
{
UpdateOrderLine(option, 0, true);
}
public void AddItem(ProductOption option, int quantity)
{
UpdateOrderLine(option, quantity, false);
}