public async Task <CalculationsCreateResponse> Handle(CalculationsCreateCommand request, CancellationToken cancellationToken)
{
var postalCodeEntity = await _dbContext.PostalCodes.FirstOrDefaultAsync(
x => x.Code == request.PostalCode
, cancellationToken);
var calculationType =
await _dbContext.CalculationRuleTypes.FirstOrDefaultAsync(
x => x.PostalCodeId == postalCodeEntity.Id,
cancellationToken : cancellationToken);
var payableTax = calculationType.TaxCalculationTypeId switch
{
1 => CalculationBuilder.CalculateProgressive(request.AnnualIncome),
2 => CalculationBuilder.CalculateFlatValue(request.AnnualIncome),
3 => CalculationBuilder.CalculateFlatRate(request.AnnualIncome),
_ => throw new NotImplementedException(),
};
var entity = new CalculationResult
{
AnnualIncome = request.AnnualIncome,
PostalCodeId = postalCodeEntity.Id,
TaxCalculationType = calculationType.Id,
DateCreated = DateTime.Now,
TotalTax = payableTax,
NetPay = request.AnnualIncome - payableTax
};
await _dbContext.CalculationResults.AddAsync(entity, cancellationToken);
await _dbContext.SaveChangesAsync(cancellationToken);
return(entity.ToCreateResponse());
}
