public static int GetTaxForPeriod(IPayPeriod payPeriod, IGrossIncome grossIncome, ITaxTable taxTable)
{
var taxBracket = GetTaxBracket(grossIncome, taxTable);
var accumulatedTax = taxBracket.AccumulatedTaxFromPreviousBracket;
var marginalTax = (grossIncome.AnnualAmount - taxBracket.LowerLimit) * taxBracket.MarginalTaxRate;
var totalTax = (accumulatedTax + marginalTax) * DateCalculator.GetPayPeriodAsAFractionOfAYear(payPeriod);
return(totalTax.Rounding());
}
public static PaySlip Create(IEmployeeDetails employeeDetails, IPayPeriod payPeriod, IGrossIncome grossIncome,
IIncomeTax incomeTax, INetIncome netIncome, ISuper super)
{
return(new PaySlip()
{
FullName = FullNameBuilder.Combine(employeeDetails),
PayPeriod = DateCalculator.GetDateString(payPeriod),
GrossIncome = grossIncome.Amount,
IncomeTax = incomeTax.Amount,
NetIncome = netIncome.Amount,
Super = super.Amount
});
}
public static GrossIncome Generate(string annualIncome, IPayPeriod payPeriod)
{
if (string.IsNullOrWhiteSpace(annualIncome))
{
throw new Exception("Annual Salary must be entered");
}
var annualIncomeAsANumber = ConvertSalaryStringToNumber(annualIncome);
var grossIncomeOverPeriod =
(annualIncomeAsANumber * DateCalculator.GetPayPeriodAsAFractionOfAYear(payPeriod)).Rounding();
return(new GrossIncome
{
Amount = grossIncomeOverPeriod,
AnnualAmount = annualIncomeAsANumber
});
}
public static string GetDateString(IPayPeriod payPeriod)
{
return(payPeriod.Start.ToString("M") + " - " + payPeriod.End.ToString("M"));
}
public static decimal GetPayPeriodAsAFractionOfAYear(IPayPeriod payPeriod)
{
var differenceOfDays = (payPeriod.End - payPeriod.Start).TotalDays;
return((decimal)differenceOfDays / 365M);
}
public static IncomeTax Generate(ITaxTable taxTable, IGrossIncome grossIncome, IPayPeriod payPeriod)
{
return(new IncomeTax()
{
Amount = TaxTableCalculator.GetTaxForPeriod(payPeriod, grossIncome, taxTable)
});
}
