public Invoice InitializeInvoice(BabySitterContract babySitterContract)
{
Invoice invoice = new Invoice()
{
totalPayment = decimal.Zero,
response = validation.ValidateUserInput(babySitterContract)
};
return(invoice);
}
public bool ValidateUserInput(BabySitterContract babySitterContract)
{
bool validateEndTime = BabysitterEndTimeIsFourAmOrEarlier(babySitterContract.BabysitterEndTime);
bool validateStartTime = BabysitterStartTimeIsFivePmOrLater(babySitterContract.BabysitterStartTime);
bool startAndEndAreInChronologicalOrder = BabysitterStartTimeIsBeforeBabysitterEndTime(babySitterContract.BabysitterStartTime, babySitterContract.BabysitterEndTime);
bool allRateStartTimesAreBeforeRateEndTimes = AllRateStartTimesAreBeforeRateEndTimes(babySitterContract);
return(validateEndTime && validateStartTime &&
startAndEndAreInChronologicalOrder &&
allRateStartTimesAreBeforeRateEndTimes);
}
public Invoice CalculateBabysitterPaymentFromBabySitterContract(BabySitterContract babySitterContract)
{
var invoice = InitializeInvoice(babySitterContract);
//if validation fails, return the invoice and do not calculate total payment
if (!invoice.response)
{
return(invoice);
}
CalculateTotalBabysitterPayment(babySitterContract, invoice);
return(invoice);
}
public bool AllRateStartTimesAreBeforeRateEndTimes(BabySitterContract babySitterContract)
{
bool result = true;
foreach (Rate rate in babySitterContract.Rates)
{
if (rate.rateEndTime <= rate.rateStartTime)
{
result = false;
break;
}
}
return(result);
}
public void CalculateTotalBabysitterPayment(BabySitterContract babySitterContract, Invoice invoice)
{
bool stillWorking = false;
foreach (Rate rate in babySitterContract.Rates)
{
// Set up variables
decimal hoursWorkedAtCurrentRate;
decimal ratePayment = decimal.Zero;
bool babySitterStartTimeisInRateBlock = DetermineIfBabysitterStartTimeIsInRateBlock(babySitterContract, rate);
bool babySitterEndTimeisInRateBlock = DetermineIfBabysitterEndTimeIsInRateBlock(babySitterContract, rate);
//if the start and end time are both in a single rate block, update payment and return the invoice
if (babySitterStartTimeisInRateBlock && babySitterEndTimeisInRateBlock)
{
invoice.totalPayment = CalculatePaymentIfBabysitterWorksDuringOnlyOneRate(invoice, babySitterContract, rate);
return;
}
// otherwise, if the time the babysitter is there spans across multiple rates
if (babySitterStartTimeisInRateBlock)
{
hoursWorkedAtCurrentRate = rate.rateEndTime - babySitterContract.BabysitterStartTime;
ratePayment = hoursWorkedAtCurrentRate * rate.dollarsPerHour;
stillWorking = true;
}
else if (babySitterEndTimeisInRateBlock)
{
hoursWorkedAtCurrentRate = babySitterContract.BabysitterEndTime - rate.rateStartTime;
ratePayment = hoursWorkedAtCurrentRate * rate.dollarsPerHour;
stillWorking = false;
}
//otherwise if stillWorking is true, babysitterEndTime hasn't been reached &
//we can assume they're working the whole time during the rate block
else if (stillWorking)
{
hoursWorkedAtCurrentRate = rate.rateEndTime - rate.rateStartTime;
ratePayment = hoursWorkedAtCurrentRate * rate.dollarsPerHour;
}
invoice.totalPayment += ratePayment;
}
}
public decimal CalculatePaymentIfBabysitterWorksDuringOnlyOneRate(Invoice invoice, BabySitterContract babySitterContract, Rate rate)
{
invoice.totalPayment = rate.dollarsPerHour *
(babySitterContract.BabysitterEndTime - babySitterContract.BabysitterStartTime);
return(invoice.totalPayment);
}
public bool DetermineIfBabysitterEndTimeIsInRateBlock(BabySitterContract babySitterContract, Rate rate)
{
return(babySitterContract.BabysitterEndTime > rate.rateStartTime &&
babySitterContract.BabysitterEndTime <= rate.rateEndTime);
}