public AmortizationScheduleResponseDto Calculate(AmortizationScheduleRequestDto request)
{
var response = new AmortizationScheduleResponseDto();
var validator = new FrenchValidator();
var validationResult = validator.Validate(request);
if (!validationResult.IsValid)
{
response = validationResult.ToErrorEntiti <ValidationResult, AmortizationScheduleResponseDto>();
return(response);
}
response.Status = 200;
InitPeriods(ref response, request.AmortizationSchedule.NumberPayments);
var previousPeriod = new PeriodEntiti();
response.AmortizationSchedule.PeriodsList.ToList().ForEach(period =>
{
CalculatePeriod(ref period, request, previousPeriod);
previousPeriod = period;
});
return(response);
}
private void CalculatePeriod(ref PeriodEntiti period, AmortizationScheduleRequestDto request, PeriodEntiti previousPeriod)
{
var interesMensual = (request.AmortizationSchedule.AnnualInterest / int.Parse(FinantialDefinitionsResource.Porcent)) / int.Parse(FinantialDefinitionsResource.MonthsInAYear);
if (period.NumPeriod == int.Parse(FinantialDefinitionsResource.InitialPeriod))
{
previousPeriod.SaldoFinal = request.AmortizationSchedule.LoanAmount;
previousPeriod.AbonoCapital = request.AmortizationSchedule.LoanAmount / request.AmortizationSchedule.NumberPayments;
period.Intereses = Math.Truncate(100 * (previousPeriod.SaldoFinal * interesMensual)) / 100;
}
period.SaldoInicial = previousPeriod.SaldoFinal;
period.Intereses = Math.Truncate(100 * (period.SaldoInicial * interesMensual)) / 100;
period.AbonoCapital = Math.Truncate(100 * (previousPeriod.AbonoCapital)) / 100;
period.Cuota = Math.Truncate(100 * (period.Intereses + period.AbonoCapital)) / 100;
period.SaldoFinal = period.SaldoInicial - previousPeriod.AbonoCapital;
}
private void CalculatePeriod(ref PeriodEntiti period, AmortizationScheduleRequestDto request, PeriodEntiti previousPeriod)
{
var interesMensual = (request.AmortizationSchedule.AnnualInterest / int.Parse(FinantialDefinitionsResource.Porcent)) / int.Parse(FinantialDefinitionsResource.MonthsInAYear);
if (period.NumPeriod == int.Parse(FinantialDefinitionsResource.InitialPeriod))
{
previousPeriod.SaldoFinal = request.AmortizationSchedule.LoanAmount;
var numberOne = int.Parse(FinantialDefinitionsResource.OneNumber);
var baseNumber = (double)(numberOne + interesMensual);
var pow = (decimal)Math.Pow(baseNumber, request.AmortizationSchedule.NumberPayments);
previousPeriod.Cuota = request.AmortizationSchedule.LoanAmount * ((pow * interesMensual) / (pow - numberOne));
}
period.SaldoInicial = previousPeriod.SaldoFinal;
period.Cuota = previousPeriod.Cuota;
period.Intereses = period.SaldoInicial * interesMensual;
period.AbonoCapital = period.Cuota - period.Intereses;
period.SaldoFinal = period.SaldoInicial - period.AbonoCapital;
}