/// <summary>
/// Used when a person wants to remove an item he has ordered
/// </summary>
public void RemoveOneOrderedItem(Person person, OrderableItem item)
{
OrderLine itemToRemove = OrderLines.FirstOrDefault(x => x.Owner.Equals(person) && x.Item.Equals(item));
if (itemToRemove != null)
{
if (person.State != States.Ordering)
{
person.State = States.Ordering;
person.OnPropertyChanged("Status");
}
OrderLines.Remove(itemToRemove);
person.OnPropertyChanged("OrderLines");
}
}
/// <summary>
/// Used when a person wants to order an item from the menu
/// </summary>
public void OrderOneItem(Person person, OrderableItem item)
{
if (person.State != States.Ordering)
{
person.State = States.Ordering;
person.OnPropertyChanged("Status");
}
OrderLines.Add(new OrderLine(person, item));
person.OnPropertyChanged("OrderLines");
}
/// <summary>
/// Used when a person wants to pay for everything another person has ordered
/// </summary>
public void PayForPerson(Person payer, Person target)
{
if (!payer.Equals(target) && target.State == States.Checkout)
{
if (payer.State != States.Checkout)
{
payer.State = States.Checkout;
payer.OnPropertyChanged("Status");
}
foreach (OrderLine line in OrderLines.Where(x => x.Owner.Equals(target)))
{
line.PayForAll(payer);
}
payer.OnPropertyChanged("OrderLines");
target.OnPropertyChanged("OrderLines");
}
}
/// <summary>
/// Used when a person pushed the confirm button,
/// either for confirming an order or a bill
/// </summary>
public void NextStateForPerson(Person person, States newState)
{
person.State = newState;
if (Persons.Count(x => x.State.Equals(person.State)) == Persons.Count ||
(GlobalState == States.Checkout && OrderLines.Count == 0))
{
NextGlobalState();
}
person.OnPropertyChanged("Status");
}