private InterestResult CreateResult(decimal lumpSumInvestment, decimal monthlyInvestment, int timescaleInYears,
decimal wideBoundPercentageUpper, decimal wideBoundPercentageLower, decimal narrowBoundPercentageUpper,
decimal narrowBoundPercentageLower, decimal targetValue)
{
var totalInvested = _interestCalculator.Calculate(lumpSumInvestment, monthlyInvestment, 0)
.Take(timescaleInYears + 1).Last();
var wideBoundUpperSeries = _interestCalculator.Calculate(lumpSumInvestment, monthlyInvestment, wideBoundPercentageUpper)
.Take(timescaleInYears + 1);
var wideBoundLowerSeries = _interestCalculator.Calculate(lumpSumInvestment, monthlyInvestment, wideBoundPercentageLower)
.Take(timescaleInYears + 1);
var narrowBoundLowerSeries = _interestCalculator.Calculate(lumpSumInvestment, monthlyInvestment, narrowBoundPercentageLower)
.Take(timescaleInYears + 1);
var narrowBoundUpperSeries = _interestCalculator.Calculate(lumpSumInvestment, monthlyInvestment, narrowBoundPercentageUpper)
.Take(timescaleInYears + 1);
var years = Enumerable.Range(0, timescaleInYears + 1);
var targetYears = Enumerable.Repeat(targetValue, timescaleInYears + 1);
var response = new InterestResult(totalInvested, wideBoundUpperSeries, wideBoundLowerSeries, narrowBoundLowerSeries, narrowBoundUpperSeries, years, targetYears);
return(response);
}
/// <summary>
/// Calcula el total de interés ganado en la cuenta.
/// </summary>
/// <returns>
/// Interés ganado.
/// </returns>
public double GetInterestEarned()
{
double interestEarned;
switch (this.Type)
{
case AccountType.Checking:
_interestCalculator = new InterestCalculatorChecking();
break;
case AccountType.Savings:
_interestCalculator = new InterestCalculatorSaving();
break;
case AccountType.MaxiSavings:
_interestCalculator = new InterestCalculatorMaxiSaving();
break;
case AccountType.NewMaxiSavings:
_interestCalculator = new InterestCalculatorNewMaxiSaving(this.LastWithdraw);
break;
}
interestEarned = _interestCalculator.Calculate(Balance, this.DateCreate);
return(interestEarned);
}
public void ApplyInterestUpdatesTheBalance()
{
// Arange
IInterestCalculator interestCalculator = Substitute.For <IInterestCalculator>();
interestCalculator.Calculate().Returns(123);
SavingsAccount savingsAccount = new SavingsAccount(interestCalculator);
// Act
savingsAccount.ApplyInterest();
// Assert
Assert.AreEqual(123, savingsAccount.Balance);
}
public void ApplyInterest()
{
Balance += _interestCalculator.Calculate();
}
private void btnCalculate_Click(object sender, EventArgs e)
{
try
{
DateTime startDate = ctlStartDate.Value.Date;
DateTime endDate = ctlEndDate.Value.Date;
int interestDays = endDate.Subtract(startDate).Days + 1;
if (interestDays < 1)
{
HostUI.ErrorMessageBox("Start date must be before end date.");
return;
}
IInterestCalculator calculator = (IInterestCalculator)cboInterestType.SelectedItem;
if (calculator == null)
{
HostUI.ErrorMessageBox("Please select an interest type.");
return;
}
string interestCatKey = GetInterestCategoryKey();
if (interestCatKey == null)
{
HostUI.ErrorMessageBox("Please select an interest category.");
return;
}
decimal annualRate;
if (!decimal.TryParse(txtAnnualRate.Text, out annualRate))
{
HostUI.ErrorMessageBox("Please enter a valid annual interest rate, like \"9.5\" for 9.5%.");
return;
}
// Compute daily balances from all selected registers
decimal startingBalance = 0M;
decimal[] dailyTotals = new decimal[interestDays];
foreach (ListViewItem itm in lvwRegisters.CheckedItems)
{
Register reg = (Register)itm.Tag;
foreach (BaseTrx baseTrx in new RegIterator <BaseTrx>(reg))
{
if (!baseTrx.IsFake && ((baseTrx is BankTrx) || (baseTrx is ReplicaTrx)))
{
if (baseTrx.TrxDate < startDate)
{
startingBalance += baseTrx.Amount;
}
else if (baseTrx.TrxDate <= endDate)
{
dailyTotals[baseTrx.TrxDate.Subtract(startDate).Days] += baseTrx.Amount;
}
else
{
break;
}
}
}
}
decimal[] dailyBalances = new decimal[interestDays];
decimal prevBalance = startingBalance;
decimal sumDailyBalances = 0M;
for (int i = 0; i < interestDays; i++)
{
dailyBalances[i] = prevBalance + dailyTotals[i];
sumDailyBalances += dailyBalances[i];
prevBalance = dailyBalances[i];
}
// Calculate interest
decimal annualRateFraction = annualRate / 100M;
decimal avgDailyBal = Math.Round(sumDailyBalances / interestDays, 2);
decimal totalInterest = Math.Round(calculator.Calculate(startDate, dailyBalances, annualRateFraction), 2);
string memo = calculator.Memo(annualRateFraction, avgDailyBal);
// Create bank trx in current register
BankTrx interestTrx = new BankTrx(HostUI.GetCurrentRegister());
DateTime dummy = DateTime.MinValue;
string trxDescription = PersonalAcctExists ? "Interest:DIVIDE" : "Interest";
interestTrx.NewStartNormal(true, "Inv", endDate, trxDescription, memo, BaseTrx.TrxStatus.Unreconciled,
false, 0M, false, false, 0, "", "");
interestTrx.AddSplit("", interestCatKey, "", "", Utilities.EmptyDate, Utilities.EmptyDate, "", "", totalInterest);
if (!HostUI.AddNormalTrx(interestTrx, ref dummy, false, "Calculate Interest"))
{
this.Close();
}
}
catch (Exception ex)
{
ErrorHandling.TopException(ex);
}
}
/// <summary>
/// Calculate earned interest
/// </summary>
/// <returns></returns>
public double interestEarned()
{
return(interestCalculator.Calculate(Transactions, dateProvider.now()));
}
