public ValidationResult Validate(NewLoanRequestModel request)
{
var validated = new ValidationResult();
if (request == null)
{
validated.AddError("Request cannot be null.");
return(validated);
}
if (request.LoanAmount <= 0)
{
validated.AddError("Loan amount must be higher than zero.");
}
if (request.Period < 1)
{
validated.AddError("Period must be more than 1 month.");
}
if (request.Interest <= 0 || request.Interest >= 100)
{
validated.AddError("Interest must be greater than 0 and less than 100.");
}
var installments = Enum.GetValues(typeof(Installments));
if (request.InstallmentType < installments.Cast <Installments>().First() || request.InstallmentType > installments.Cast <Installments>().Last())
{
var errorString = $"Installment type should be one of the following:";
foreach (var i in installments)
{
errorString += $"i({Enum.GetName(typeof(Installments), i)})";
}
validated.AddError(errorString);
}
if (request.PromoPeriod < 0)
{
validated.AddError("Promo period cannot be less than zero months.");
}
if (request.PromoPeriod >= request.Period)
{
validated.AddError("Promo period must be less than the whole period.");
}
if (request.PromoInterest < 0)
{
validated.AddError("Promo interest cannot be less than 0.");
}
if (request.PromoInterest >= request.Interest)
{
validated.AddError("Promo interest must be less than the original interest");
}
if (request.GracePeriod < 0)
{
validated.AddError("Grace period cannot be less than zero months.");
}
if (request.GracePeriod >= request.Period)
{
validated.AddError("Grace period must be less than the whole period.");
}
var invalidFees = request.Fees.Select(x => _feeModelValidator.Validate(x)).Where(x => !x.IsValid);
foreach (var fee in invalidFees)
{
validated.AddError(fee.ToString());
}
return(validated);
}
