81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
package cuit
|
|
|
|
import (
|
|
"regexp"
|
|
"strconv"
|
|
|
|
"github.com/gabdlr/api-cuit-go/utils"
|
|
)
|
|
|
|
const CUIT_REGEX = `^([\d]{2}-[\d]{8}-[\d]{1}|[\d]{11})$`
|
|
|
|
var CUIT_TYPES = map[uint8]bool{
|
|
30: true,
|
|
33: true,
|
|
34: true,
|
|
}
|
|
|
|
func IsValid(cuit string) (isValidCuit bool) {
|
|
if validateFormat(cuit) {
|
|
cuit = utils.StandardizeCuit(cuit)
|
|
if validateCuitType(cuit) {
|
|
isValidCuit = validateWithVerifierDigit(cuit)
|
|
}
|
|
}
|
|
return isValidCuit
|
|
}
|
|
|
|
func validateWithVerifierDigit(cuit string) bool {
|
|
verificationResult := false
|
|
toVerify := utils.ReverseStringWithBuffer(cuit[:10])
|
|
|
|
weightUpResult := 0
|
|
weightUpFactorCounter := -1
|
|
weightUpCheckFactor := []int{2, 3, 4, 5, 6, 7}
|
|
|
|
verifierDigit, err := strconv.Atoi(cuit[len(cuit)-1:])
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
for i := range 10 {
|
|
if i%6 == 0 {
|
|
weightUpFactorCounter += 1
|
|
}
|
|
weightUp, err := strconv.Atoi(string(toVerify[i]))
|
|
if err != nil {
|
|
return verificationResult
|
|
}
|
|
weightUpResult += weightUp * weightUpCheckFactor[i-6*weightUpFactorCounter]
|
|
}
|
|
mod11WeightupResult := weightUpResult % 11
|
|
|
|
switch mod11WeightupResult {
|
|
case 11:
|
|
verificationResult = verifierDigit == 0
|
|
case 10:
|
|
verificationResult = verifierDigit == 9
|
|
default:
|
|
verificationResult = verifierDigit == 11-mod11WeightupResult
|
|
}
|
|
|
|
return verificationResult
|
|
}
|
|
|
|
func validateCuitType(cuit string) bool {
|
|
validationResult := false
|
|
cuitType, err := strconv.Atoi(cuit[:2])
|
|
if err == nil {
|
|
validationResult = CUIT_TYPES[uint8(cuitType)]
|
|
}
|
|
return validationResult
|
|
}
|
|
|
|
func validateFormat(cuit string) bool {
|
|
regexExp, err := regexp.Compile(CUIT_REGEX)
|
|
if err == nil {
|
|
return regexExp.MatchString(cuit)
|
|
}
|
|
return false
|
|
}
|