public static Collection<PaymentPlanOutputEntry> CalculateDebtSnowball(DebtManager debtManager, PaymentManager paymentManager)
{
Collection<PaymentPlanOutputEntry> col = new Collection<PaymentPlanOutputEntry>();
DateTime startDate = DateTime.Now;
DateTime currentDate = DateTime.Now;
foreach (DebtEntry debt in debtManager.DebtEntries)
{
while (debt.CurrentBalance > 0)
{
double salarySnowball = paymentManager.GetTotalMonthlySnowball(startDate, currentDate);
col.Add(DebtSnowballCalculator.ApplyMonthlyPayment(currentDate, debt, paymentManager, salarySnowball));
currentDate = currentDate.AddMonths(1);
}
}
return col;
}
// display results for each debt in results panels
private void DisplayResults(DebtManager debtManager)
{
List <Control> controls;
Panel resultsPanel;
int months;
string interestStr;
double interest;
Color monthsColor;
Color interestColor;
// totals
int monthsTotal = 0;
double interestTotal = 0;
foreach (Debt debt in debtManager)
{
monthsColor = Color.Black;
interestColor = Color.Black;
resultsPanel = debt.resultsPanel;
controls = GetControls(resultsPanel);
if (controls[0].Text != "" && controls[1].Text != "")
{
// get results panel values from previous calculation
months = Convert.ToInt32(controls[0].Text);
interestStr = controls[1].Text.Trim('$');
interest = Convert.ToDouble(interestStr);
// set results panel colors to reflect improvement or worsening of previous calculation
if (months < debt.months)
{
monthsColor = Color.Red;
}
else if (months > debt.months)
{
monthsColor = Color.Green;
}
if (interest < Math.Round(debt.interestPaid, 2, MidpointRounding.AwayFromZero))
{
interestColor = Color.Red;
}
else if (interest > Math.Round(debt.interestPaid, 2, MidpointRounding.AwayFromZero))
{
interestColor = Color.Green;
}
}
// populate results panel for this debt
controls[0].Text = debt.months.ToString();
controls[1].Text = (debt.interestPaid + debt.feesPaid).ToString("c");
controls[2].Text = debt.payment.ToString("c");
controls[0].ForeColor = monthsColor;
controls[1].ForeColor = interestColor;
// add to calculation totals
if (debt.months > monthsTotal)
{
monthsTotal = debt.months;
}
interestTotal += debt.interestPaid + debt.annualFees;
}
// populate total results of all debts
int monthsDifference;
double interestDifference;
Color monthsDifferenceColor = Color.Black;
Color interestDifferenceColor = Color.Black;
// set total time to pay off all debts
lblTimeToPayAll.Text = FormatMonths(monthsTotal);
// skip difference if first calculation
// if not, display time difference with appropriate color
if (lastMonthsTotal != 0)
{
monthsDifference = lastMonthsTotal - monthsTotal;
if (monthsDifference > 0)
{
monthsDifferenceColor = Color.Green;
}
if (monthsDifference < 0)
{
monthsDifferenceColor = Color.Red;
}
lblTimeDifference.Text = FormatMonths(monthsDifference);
lblTimeDifference.ForeColor = monthsDifferenceColor;
}
// set total interest paid on all debts
lblTotalInterest.Text = interestTotal.ToString("c");
// skip difference if first calculation
// if not, display interest difference with appropriate color
if (lastInterestTotal != 0)
{
interestDifference = lastInterestTotal - interestTotal;
interestDifference = Math.Round(interestDifference, 2, MidpointRounding.AwayFromZero);
if (interestDifference > 0)
{
interestDifferenceColor = Color.Green;
}
else if (interestDifference < 0)
{
interestDifferenceColor = Color.Red;
}
lblInterestDifference.Text = interestDifference.ToString("c");
lblInterestDifference.ForeColor = interestDifferenceColor;
}
// store values for comparison on next calculation
lastMonthsTotal = monthsTotal;
lastInterestTotal = interestTotal;
}
// parse active main panel data to create a list of debt objects
private DebtManager CreateDebtList(List <Panel> activePanels)
{
DebtManager debtManager = new DebtManager();
foreach (Panel p in activePanels)
{
List <Control> controls = GetControls(p);
List <Control> matchingControls = GetControls(GetPanel(p, 1));
ListBox type = controls[2] as ListBox;
ListBox structure = controls[3] as ListBox;
NumericUpDown order = controls[10] as NumericUpDown;
if (type.Text == "Amortized Loan")
{
Amortized debt = new Amortized();
// extract info from input boxes
debt.payment = Convert.ToDouble(controls[4].Text);
if (rollover.Checked)
{
debt.maxPayment = Convert.ToDouble(controls[5].Text);
}
debt.order = (int)order.Value;
debt.principalLeft = Convert.ToDouble(matchingControls[0].Text);
debt.apr = Convert.ToDouble(matchingControls[1].Text) / 100;
debt.annualFees = Convert.ToDouble(matchingControls[2].Text);
NumericUpDown feesMonthUpDown = matchingControls[3] as NumericUpDown;
debt.feesMonth = (int)feesMonthUpDown.Value;
debt.resultsPanel = GetPanel(p, 2);
// set compounding period and interestFactor
if (structure.Text == "Daily")
{
debt.period = 365.25;
}
else if (structure.Text == "Monthly")
{
debt.period = 12;
}
debt.CalculateInterestFactor();
// add completed debt object to list
debtManager.Add(debt);
}
else if (type.Text == "Credit Card/Line")
{
CreditCard debt = new CreditCard();
// extract info from text boxes
debt.payment = Convert.ToDouble(controls[4].Text);
if (rollover.Checked)
{
debt.maxPayment = Convert.ToDouble(controls[5].Text);
}
debt.order = (int)order.Value;
debt.principalLeft = Convert.ToDouble(matchingControls[0].Text);
debt.apr = Convert.ToDouble(matchingControls[1].Text) / 100;
debt.annualFees = Convert.ToDouble(matchingControls[2].Text);
NumericUpDown feesMonthUpDown = matchingControls[3] as NumericUpDown;
debt.feesMonth = Convert.ToInt16(feesMonthUpDown.Value);
debt.resultsPanel = GetPanel(p, 2);
// set compounding period and interestFactor
if (structure.Text == "Daily")
{
debt.period = 365.25;
}
else if (structure.Text == "Monthly")
{
debt.period = 12;
}
debt.CalculateInterestFactor();
// add completed debt object to list
debtManager.Add(debt);
}
else if (type.Text == "Add-on Loan")
{
AddOn debt = new AddOn();
// extract info from text boxes
debt.payment = Convert.ToDouble(controls[4].Text);
if (rollover.Checked)
{
debt.maxPayment = Convert.ToDouble(controls[5].Text);
}
debt.order = (int)order.Value;
debt.principalLeft = Convert.ToDouble(matchingControls[0].Text);
debt.annualFees = Convert.ToDouble(matchingControls[1].Text);
NumericUpDown feesMonthUpDown = matchingControls[2] as NumericUpDown;
debt.feesMonth = Convert.ToInt16(feesMonthUpDown.Value);
debt.resultsPanel = GetPanel(p, 2);
// add completed debt object to list
debtManager.Add(debt);
}
}
debtManager.Sort((d1, d2) => d1.order.CompareTo(d2.order));
return(debtManager);
}