public override Task InitializeViewModelAsync(object navigationData)
{
paymentDetails = navigationData as Dictionary <string, object>;
loanAmount = (double)paymentDetails["loanAmount"];
interest = (double)paymentDetails["interest"];
term = (int)paymentDetails["term"];
termType = (LoanTermType)paymentDetails["termType"];
emiAmount = (double)paymentDetails["emi"];
return(base.InitializeViewModelAsync(navigationData));
}
public double CalculateEMI(double loanAmount, double interest, int term, LoanTermType termType)
{
interestFactor = Convert.ToDouble((interest / 12) / 100);
tenure = (termType == LoanTermType.Years) ? (term * 12) : term;
if (!interestFactor.Equals(0))
{
double emprical = Math.Pow(1 + interestFactor, tenure);
currentEMI = (loanAmount * interestFactor * emprical) / (emprical - 1);
}
else
{
currentEMI = loanAmount / tenure;
}
return(currentEMI);
}
public void ShareLoanDetails(double loanAmount, double interest, int term, LoanTermType termType, double emiAmount, double totalPricipalAmount, double totalInterstAmount)
{
string currencySymbol = CultureInfo.CurrentCulture.NumberFormat.CurrencySymbol;
string loanTermType = termType.Equals(LoanTermType.Years) ? "Years" : "Months";
string principalAmount = "Principal Loan Amount : " + currencySymbol + " " + loanAmount.ToString("N2", CultureInfo.InvariantCulture) + "\n";
string interestPercent = "Interest Rate (in percentage): " + interest.ToString("N2", CultureInfo.InvariantCulture) + "p/a \n";
string loanTerm = "Loan Term : " + term + " " + loanTermType + "\n\n";
string emiAmountDetails = "Monthly Payment (EMI) : " + currencySymbol + " " + emiAmount.ToString("N2", CultureInfo.InvariantCulture) + "\n";
string totalAmount = "Total Interest Payment : " + currencySymbol + " " + totalInterstAmount.ToString("N2", CultureInfo.InvariantCulture) + "\n";
string payableAmount = "Total Amount (Principal + Interest): " + currencySymbol + " " + totalPricipalAmount.ToString("N2", CultureInfo.InvariantCulture) + "\n";
DataTransfer.RequestAsync(new ShareTextRequest
{
Subject = "Loan Details",
Text = "Loan Details" + "\n\n" + principalAmount + interestPercent + loanTerm + emiAmountDetails + totalAmount + payableAmount,
Title = "Loan Details"
});
}
public Dictionary <string, object> GetAmortizationDetails(double interest, double emi, double loanAmount, int term, LoanTermType termType, DateTime paymentStartMonth)
{
DateTime date = paymentStartMonth;
double beginBalance, endBalance, currentInterest, totalEmiAmount = 0, totalPrincipal = 0, totalInterest = 0;
double emiPaidPerYear = 0, prncPaidPerYear = 0, totalInterestYear = 0, currentPrinicipal = loanAmount;
interestFactor = Convert.ToDouble((interest / 12) / 100);
tenure = (termType == LoanTermType.Years) ? (term * 12) : term;
monthlyPaymentDetails = new ObservableCollection <MonthlyPaymentDetail>();
yearlyPaymentDetails = new ObservableCollection <YearlyPaymentDetail>();
for (int i = 0; i < tenure; i++)
{
currentInterest = !interestFactor.Equals(0) ? (currentPrinicipal * interestFactor) : loanAmount;
totalInterest += currentInterest;
totalEmiAmount += emi;
totalPrincipal += emi - currentInterest;
endBalance = currentPrinicipal - (emi - currentInterest);
emiPaidPerYear += emi;
prncPaidPerYear += emi - currentInterest;
totalInterestYear += currentInterest;
monthlyPaymentDetails.Add(
new MonthlyPaymentDetail
{
Principal = Math.Round(emi - currentInterest),
Interest = Math.Round(currentInterest),
Balance = Math.Round(endBalance),
Payment = Math.Round(emi),
Month = new DateTime(date.Year, date.Month, date.Day)
});
if (i == 0 || date.Month == 1)
{
beginBalance = currentPrinicipal;
}
if (date.Month == 12 || i.Equals(tenure - 1))
{
yearlyPaymentDetails.Add(
new YearlyPaymentDetail
{
Principal = Math.Round(prncPaidPerYear),
Interest = Math.Round(totalInterestYear),
Balance = Math.Round(endBalance),
Payment = Math.Round(emiPaidPerYear),
Year = new DateTime(date.Year, date.Month, date.Day)
});
emiPaidPerYear = 0;
prncPaidPerYear = 0;
totalInterestYear = 0;
}
currentPrinicipal = endBalance;
if (i < tenure - 1)
{
date = date.AddMonths(1);
}
}
return(new Dictionary <string, object>
{
{ "monthlyDetails", monthlyPaymentDetails },
{ "yearlyDetails", yearlyPaymentDetails }
});
}
public double GetPayablePrincipalAmount(int term, LoanTermType termType)
{
tenure = (termType == LoanTermType.Years) ? (term * 12) : term;
return(Math.Round(currentEMI * tenure));
}
public double GetPayableInterestAmount(int term, LoanTermType termType, double loanAmount)
{
tenure = (termType == LoanTermType.Years) ? (term * 12) : term;
return(Math.Round((currentEMI * tenure) - loanAmount));
}
