public RootVM()
{
InitMef();
CreateSeries();
Model = new PlotModel();
Model.Title = "Mortgage";
Model.Axes.Add(new LinearAxis {
Position = AxisPosition.Left
});
var dateAxis = new DateTimeAxis();
dateAxis.Position = AxisPosition.Bottom;
dateAxis.Minimum = DateTimeAxis.ToDouble(MortgageConstants.GetDateFromMonthOfMortgage(0));
dateAxis.Maximum = DateTimeAxis.ToDouble(MortgageConstants.GetDateFromMonthOfMortgage(MortgageConstants.OriginalDurationInMonths));
Model.Axes.Add(new DateTimeAxis {
Position = AxisPosition.Bottom
});
FinancialData = new FinancialData(Settings.Default.DataFile);
GazelleVM = new GazelleVM(FinancialData);
foreach (var seriesPair in _mefSeriesPlots)
{
Model.Series.Add(seriesPair.Value);
}
SavingsVM = new SavingsVM(FinancialData);
}
public SavingsVM(FinancialData financialData)
{
_gazelleSeries = GazelleSeries.Instance;
_financialData = financialData;
Model = new PlotModel();
Model.Title = "Savings Over Time";
var valueAxis = new LinearAxis();
valueAxis.Position = AxisPosition.Left;
valueAxis.Minimum = 0;
Model.Axes.Add(valueAxis);
var dateAxis = new DateTimeAxis();
dateAxis.Position = AxisPosition.Bottom;
dateAxis.Minimum = DateTimeAxis.ToDouble(MortgageConstants.GetDateFromMonthOfMortgage(0));
dateAxis.Maximum = DateTimeAxis.ToDouble(MortgageConstants.GetDateFromMonthOfMortgage(MortgageConstants.OriginalDurationInMonths));
Model.Axes.Add(new DateTimeAxis {
Position = AxisPosition.Bottom
});
InitSeries();
_financialData.DataChanged += OnFinancialDataChanged;
RefreshSavingsSeries();
}
private static void PopulateSeriesData(LineSeries lineSeries, IMortgagePaydownSeries series)
{
var balance = series.StartValue;
var startDate = series.StartDate;
int m;
for (m = 0; balance > 0; m++)
{
var date = MortgageConstants.GetDateFromMonthOfMortgage(m);
if (date >= startDate)
{
lineSeries.Points.Add(new DataPoint(DateTimeAxis.ToDouble(date), (double)balance));
balance = HandleMonth(balance, series.GetPayment(date, balance));
}
}
lineSeries.Points.Add(new DataPoint(DateTimeAxis.ToDouble(MortgageConstants.GetDateFromMonthOfMortgage(m)), 0));
}
private void OnFinancialDataChanged(object sender, EventArgs e)
{
ExtraPayments.Clear();
var unallocatedBalances = new Dictionary <Account, Dictionary <DateTime, decimal> >();
var now = DateTime.Now;
var currentMonth = new DateTime(now.Year, now.Month, 1);
int currentMonthIndex = 0;
var endMonth = MortgageConstants.GetDateFromMonthOfMortgage(MortgageConstants.OriginalDurationInMonths);
int month = 0;
// Get to this month
for (; MortgageConstants.GetDateFromMonthOfMortgage(month) < currentMonth; month++)
{
;
}
currentMonthIndex = ++month;
var nextMonth = MortgageConstants.GetDateFromMonthOfMortgage(currentMonthIndex);
foreach (var account in _financialData.Accounts)
{
var accountBalances = new Dictionary <DateTime, decimal>();
// For the rest of the term of the mortgage, get the current balance of the account
for (month = currentMonthIndex; month < MortgageConstants.OriginalDurationInMonths; month++)
{
var date = MortgageConstants.GetDateFromMonthOfMortgage(month);
accountBalances[date] = account.Value;
// Account for each transaction we know about
foreach (var transaction in _financialData.Transactions)
{
if (transaction.AccountName == account.Name && transaction.Payment.Date <= date)
{
if (string.IsNullOrEmpty(transaction.AllotmentName))
{
accountBalances[date] += transaction.Payment.Amount;
}
}
}
}
unallocatedBalances[account] = accountBalances;
}
// Merge all accounts together, then deal with allotments for account-agnostic stuff
var mergedBalances = new Dictionary <DateTime, decimal>();
foreach (var account2 in unallocatedBalances.Keys)
{
for (month = currentMonthIndex; month < MortgageConstants.OriginalDurationInMonths; month++)
{
var date = MortgageConstants.GetDateFromMonthOfMortgage(month);
if (mergedBalances.ContainsKey(date))
{
mergedBalances[date] += unallocatedBalances[account2][date];
}
else
{
mergedBalances[date] = unallocatedBalances[account2][date];
}
}
}
foreach (var allotment in _financialData.Allotments)
{
for (month = currentMonthIndex; month < MortgageConstants.OriginalDurationInMonths; month++)
{
var date = MortgageConstants.GetDateFromMonthOfMortgage(month);
if (allotment.Date <= date)
{
mergedBalances[date] -= allotment.Value;
}
}
}
var min = mergedBalances.Values.LastOrDefault();
// Walk backwards through the dates and keep the minimum balances
foreach (var date in mergedBalances.Keys.Reverse())
{
if (min > mergedBalances[date])
{
min = mergedBalances[date];
}
else
{
mergedBalances[date] = min;
}
}
// Now walk forwards through the dates and make payments for every time the balance goes up
var max = mergedBalances.Values.FirstOrDefault();
ExtraPayments.Add(new Payment(nextMonth, max));
foreach (var date in mergedBalances.Keys)
{
if (mergedBalances[date] > max)
{
ExtraPayments.Add(new Payment(date, mergedBalances[date] - max));
max = mergedBalances[date];
}
}
}