func (c *Converter) genConvert(value decimal.Decimal, from, to Currency, at *time.Time) (decimal.Decimal, error) {
var t time.Time
if at == nil {
t = time.Now().UTC()
} else {
t = *at
}
var usd decimal.Decimal
if from == USD {
usd = value
} else {
fromRate, err := c.ex.Get(t, from)
if err != nil {
return decimal.Zero, err
}
usd = value.Mul(fromRate.ToUSD)
}
if to == USD {
return usd, nil
}
toRate, err := c.ex.Get(t, to)
if err != nil {
return decimal.Zero, err
}
return usd.Mul(toRate.FromUSD), nil
}
func (irrf *IRRF) Calculate(grossSalary decimal.Decimal) decimal.Decimal {
for _, irrfInterval := range irrf.irrfRange {
if grossSalary.Cmp(irrfInterval.Lower) >= 0 && grossSalary.Cmp(irrfInterval.Upper) <= 0 {
return grossSalary.Mul(irrfInterval.Aliquot).Sub(irrfInterval.Deduction)
}
}
lastIRRFInterval := irrf.irrfRange[len(irrf.irrfRange)-1]
return grossSalary.Mul(lastIRRFInterval.Aliquot).Sub(lastIRRFInterval.Deduction)
}
func (inss *INSS) Calculate(grossSalary decimal.Decimal) decimal.Decimal {
for _, inssInterval := range inss.inssRange {
if grossSalary.Cmp(inssInterval.Lower) >= 0 && grossSalary.Cmp(inssInterval.Upper) <= 0 {
return grossSalary.Mul(inssInterval.Aliquot)
}
}
lastINSSInterval := inss.inssRange[len(inss.inssRange)-1]
return lastINSSInterval.Upper.Mul(lastINSSInterval.Aliquot)
}
func (f fakeCalculator) Calculate(d decimal.Decimal) decimal.Decimal {
return d.Mul(rebatePercentage)
}
func (dep *Dependent) Calculate(quantity decimal.Decimal) decimal.Decimal {
return quantity.Mul(dep.deduction)
}
func newton(z, x decimal.Decimal) decimal.Decimal {
return z.Sub(z.Mul(z).Sub(x).Div(Const2.Mul(z)))
}
func MultiplyDecimalWithoutNew(decimalStartFloat, decimalFactor decimal.Decimal) (calculated decimal.Decimal) {
calculated = decimalStartFloat.Mul(decimalFactor)
return
}