public IEnumerable Handle(Func <Guid, TabAggregate> al, CloseTab c)
{
var tab = al(c.Id);
if (!tab.Open)
{
throw new TabNotOpen();
}
if (tab.HasUnservedItems())
{
throw new TabHasUnservedItems();
}
if (c.AmountPaid < tab.ServedItemsValue)
{
throw new MustPayEnough();
}
yield return(new TabClosed
{
Id = c.Id,
AmountPaid = c.AmountPaid,
OrderValue = tab.ServedItemsValue,
TipValue = c.AmountPaid - tab.ServedItemsValue
});
}
public IEnumerable <IEvent> Handle(CloseTab c)
{
if (!open)
{
throw new TabNotOpen();
}
if (HasUnservedItems())
{
throw new TabHasUnservedItems();
}
if (c.AmountPaid < servedItemsValue)
{
throw new MustPayEnough();
}
yield return(new TabClosed
{
Id = c.Id,
AmountPaid = c.AmountPaid,
OrderValue = servedItemsValue,
TipValue = c.AmountPaid - servedItemsValue
});
}