Market: CashierRole - ellenvoegtli/simcity GitHub Wiki

ComputeBill(Map<String, Integer> inventory, Customer c, Employee e){
	Bill b = new Bill(inventory, c, computing, e);
	bills.add(b);
}
ComputeBill(Map<String, Integer> inventory, String name, Employee e){
	Bill b = new Bill(inventory, name, computing, e);
	bills.add(b);
}
HereIsPayment(double amount, Customer cust){
	Bill b = bills.find(cust);
	b.amountPaid = amount;
	b.s = calculatingChange;
}
PleaseRecalculateBill(Customer cust){
	Bill b = bills.find(cust);
	b.s = recomputingBill;
}
ChangeVerified(Customer cust){
	Bill b = bills.find(cust);
	cash += b.amountMarketGets;
	bills.remove(b);
}
PleaseRecalculateChange(Customer cust, double amount){
	Bill b = bills.find(cust);
	b.recalculatedChange = amount;
	b.s = recalculatingChange;
}
HereIsMoneyIOwe(Customer c, double amount){
	availableMoney += amount;
}

MarketMenu marketMenu;
List<Bill> bills;
List<EmployeeAgent> employees;
double cash;
enum BillState {computing, waitingForPayment, recomputingBill, calculatingChange, oweMoney, paid};
class Bill{
	Map<String, Integer> itemsBought;
	double amountCharged, newAmountCharged, amountPaid, amountOwed, recalculatedChange, amountMarketGets;
	CustomerAgent c;
	String restaurantName;
	BillState s;
	EmployeeAgent e;
}

if E b in bills such that b.s = recalculatingChange
	RecomputeChange(b);
if E b in bills such that b.s = recomputingBill
	RecomputeBill(b);
if E b in bills such that b.s = calculatingChange
	CalculateChange(b);
if E b in bills such that b.s = computing
	ComputeBill(b);

ComputeBill(Bill b){
	for (E entry in b.itemsBought){
		for (E Item i in marketMenu.menuItems)
			if (i.getItem() = entry.getKey())
				b.amountCharged += i.getPrice()*entry.getValue();
	}
	if (b.c == null){
		b.e.HereIsBill(b.restaurantName, b.amountCharged);
		bills.remove(b);
	}
	else {
		b.e.HereIsBill(b.c, b.amountCharged);
		b.s = waitingForPayment;
	}
}

CalculateChange(Bill b){
	if (b.amountPaid >= b.amountCharged) {
		b.c.HereIsYourChange((b.amountPaid - b.amountCharged), b.amountCharged);
		b.amountMarketGets = b.amountCharged;
		b.s = paid;
	}
	else {
		b.c.NotEnoughCash(b.amountCharged - b.amountPaid);
		b.amountOwed = b.amountCharged - b.amountPaid;
		b.amountMarketGets = b.amountPaid;
		b.s = oweMoney;
	}
}
RecomputeChange(Bill b){
	b.c.HereIsYourChange(b.recalculatedChange, b.amountCharged);
	b.amountMarketGets = b.amountPaid - b.recalculatedChange;
	b.s = paid;
}
RecomputeBill(Bill b){
	for (E entry in b.itemsBought){
		for (E Item i in marketMenu.menuItems)
			if (i.getItem() = entry.getKey())
				b.newAmountCharged += i.getPrice()*entry.getValue();
	}
	if (b.newAmountCharged < b.amountCharged){
		b.amountCharged = b.newAmountCharged;
		//if customer,
		b.c.HereIsBill(b.amountCharged);
	}
	else if (b.newAmountCharged > b.amountCharged){
		//if customer,
		b.c.HereIsBill(b.amountCharged);
	}
	else if (b.newAmountCharged = b.amountCharged){
		//if customer,
		b.c.HereIsFinalBill(b.amountCharged);
	}
	b.s = waitingForPayment;
}