private void createBillFor(Customer customer) {
List<CallEvent> customerEvents = new ArrayList<CallEvent>();
for (CallEvent callEvent : callLog) {
if (callEvent.getCaller().equals(customer.getPhoneNumber())) {
customerEvents.add(callEvent);
}
}
List<Call> calls = new ArrayList<Call>();
CallEvent start = null;
for (CallEvent event : customerEvents) {
if (event instanceof CallStart) {
start = event;
}
if (event instanceof CallEnd && start != null) {
calls.add(new Call(start, event));
start = null;
}
}
BigDecimal totalBill = new BigDecimal(0);
List<LineItem> items = new ArrayList<LineItem>();
for (Call call : calls) {
Tariff tariff = CentralTariffDatabase.getInstance().tarriffFor(customer);
BigDecimal cost;
DaytimePeakPeriod peakPeriod = new DaytimePeakPeriod();
if (peakPeriod.offPeak(call.startTime())
&& peakPeriod.offPeak(call.endTime())
&& call.durationSeconds() < 12 * 60 * 60) {
cost = new BigDecimal(call.durationSeconds()).multiply(tariff.offPeakRate());
} else {
cost = new BigDecimal(call.durationSeconds()).multiply(tariff.peakRate());
}
cost = cost.setScale(0, RoundingMode.HALF_UP);
BigDecimal callCost = cost;
totalBill = totalBill.add(callCost);
items.add(new LineItem(call, callCost));
}
new BillGenerator().send(customer, items, MoneyFormatter.penceToPounds(totalBill));
}
public static void initialiseBillingSystem() {
// Clear all items from the previous fixtures:
printer.clear();
customerDatabase.clear();
// BillGenerator can stay as it is.
// Make sure no old times remain in the clock buffer:
clock.reset();
// Because the CustomerCallLog class has no clearing method,
// a new object has to be created in here:
callLog = new CustomerCallLog(clock);
// The new callLog and changes to the strategy can't be set to the old BillingSystem,
// so new one has to be created
billingSystem =
new BillingSystem(
customerDatabase,
CentralTariffDatabase.getInstance(),
callLog,
currentStrategy,
billGenerator);
}
public Tariff getCustomerTariff(Customer customer) {
return CentralTariffDatabase.getInstance().tarriffFor(customer);
}