public AmortizationReport GenerateReport(LoanEntity loan,
Dictionary <DateTime, double> paymentChangesByDate)
{
int loanLength = LoanTermCalculator.GetMonthsUntilPaid(loan).getMonthsUntilPaidOff();
ArrayList paymentDates = DateUtil.GetListOfDatesMonthApart(DateUtil.GetNow(), loanLength);
AmortizationReport report = new AmortizationReport(loan);
double balance = loan.GetCurrentBalance();
foreach (DateTime date in paymentDates)
{
DateTime balanceEffectiveDate = DateUtil.FindDateBeforeFromList(date, new List <DateTime>(paymentChangesByDate.Keys));
double paymentForDate = date == balanceEffectiveDate?loan.GetMinimumMonthlyPayment() : paymentChangesByDate[balanceEffectiveDate];
AmortizationRow row = new AmortizationRowGenerator()
.GenerateRow(report.GetReportRows().Count + 1,
balance,
loan.GetMonthlyInterestRate(),
paymentForDate,
date);
report.AddRow(row);
balance = row.GetBalance();
if (balance < 0)
{
break;
}
}
return(report);
}
static void Main(string[] args)
{
LoanEntity loan = LoanEntity.NewBuilder()
.SetLoanName("Test Loan")
.SetPrinciple(20000)
.SetCurrentBalance(20000)
.SetApr(.006155 * 12)
.SetMinuminMonthlyPayment(415.76)
.Build();
LoanEntity secondLoan = LoanEntity.NewBuilder()
.SetLoanName("Test Loan")
.SetPrinciple(5000)
.SetCurrentBalance(5000)
.SetApr(.006155 * 12)
.SetMinuminMonthlyPayment(200)
.Build();
Console.WriteLine("Expected length of loan paying minimum : " + new LoanTermCalculator()
.GetMonthsUntilPaid(loan)
.getMonthsUntilPaidOff());
Dictionary <DateTime, double> payementChanges = new Dictionary <DateTime, double>
{
//{ DateTime.Now.AddMonths(5), 550.0 }
};
AmortizationReportGenerator amortizationReportGenerator = new AmortizationReportGenerator(new LoanTermCalculator(),
new DateUtil());
AmortizationReport report = amortizationReportGenerator.GenerateReport(loan,
payementChanges);
AmortizationReport secondReport = amortizationReportGenerator.GenerateReport(secondLoan,
payementChanges);
AmortizationReportConsolePrinter printer = new AmortizationReportConsolePrinter();
printer.PrintReport(report);
printer.PrintReport(secondReport);
SnowBallReportGenerator snowBallReportGenerator = new SnowBallReportGenerator(amortizationReportGenerator,
new AmortizationReportEvaluator());
List <LoanEntity> loans = new List <LoanEntity> {
loan, secondLoan
};
List <AmortizationReport> snowBallReports = snowBallReportGenerator.GenerateReport(loans);
foreach (AmortizationReport snowReport in snowBallReports)
{
printer.PrintReport(snowReport);
}
}
public void PrintReport(AmortizationReport report)
{
LoanEntity loan = report.GetLoan();
Console.WriteLine("LOAN AT TIME OF REPORT");
Console.WriteLine("".PadRight(20) +
"PAYMENT AMOUNT".PadRight(20) +
"INTEREST".PadRight(20) +
"PRINCIPAL".PadRight(20) +
"BALANCE".PadRight(20));
Console.WriteLine("Initial".PadRight(20) + "".PadRight(20) + "".PadRight(20) + "".PadRight(20) + loan.GetCurrentBalance().ToString().PadRight(20));
foreach (AmortizationRow row in report.GetReportRows())
{
Console.WriteLine(row.GetPaymentNumber().ToString().PadRight(20) +
row.GetPaymentAmount().ToString().PadRight(20) +
row.GetInterest().ToString().PadRight(20) +
row.GetPrincipal().ToString().PadRight(20) +
row.GetBalance().ToString().PadRight(20));
}
}
public AmortizationReport(LoanEntity loan)
{
Loan = loan;
}
public LoanTerm GetMonthsUntilPaid(LoanEntity loan)
{
return(new LoanTerm(-Math.Log(1 - (loan.GetCurrentBalance() * loan.GetMonthlyInterestRate() / loan.GetMinimumMonthlyPayment()))
/ Math.Log(1 + loan.GetMonthlyInterestRate())));
}
