stdnum
Version:
Standard Number Validation
59 lines • 4.9 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
function clean(input) {
const [v, err] = strings.cleanUnicode(input, ' -');
if (err) {
return ['', err];
}
if (v.startsWith('CL')) {
return [v.substr(2), null];
}
return [v, null];
}
const impl = {
name: 'Chilean National Tax Number',
localName: 'Rol Único Tributario ',
abbreviation: 'RUT',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
const [a, b, c, d] = strings.splitAt(value, 2, 5, 8);
return `${a}.${b}.${c}-${d}`;
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 8 && value.length !== 9) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
const [front, check] = strings.splitAt(value, value.length - 1);
if (!strings.isdigits(front)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const sum = weightedSum(front, {
reverse: true,
weights: [9, 8, 7, 6, 5, 4, 9, 8, 7],
modulus: 11,
});
const digit = '0123456789K'[sum];
if (check !== digit) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: true,
isCompany: true,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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