stdnum
Version:
Standard Number Validation
56 lines • 4.67 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const checkDigit = '0123456789K';
const impl = {
name: 'Guatemala Tax Number',
localName: 'Número de Identificación Tributaria',
abbreviation: 'NIT',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return strings.splitAt(value, -1).join('-');
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length < 2 || value.length > 12) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
const [front, check] = strings.splitAt(value, -1);
if (!strings.isdigits(front)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (!checkDigit.includes(check)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const sum = (11 -
weightedSum(front, {
reverse: true,
weights: [2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14],
modulus: 11,
})) %
11;
if (check !== checkDigit[sum]) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: false,
isCompany: true,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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