stdnum
Version:
Standard Number Validation
67 lines • 6 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
import { pymod } from '../util/pymod';
function clean(input) {
const [value, err] = strings.cleanUnicode(input, ' -');
if (err) {
return [value, err];
}
if (value.startsWith('UY')) {
return [value.substr(2), null];
}
return [value, err];
}
const impl = {
name: 'Uruguayan Tax Number',
localName: 'Registro Único Tributario',
abbreviation: 'RUT',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return strings.splitAt(value, 2, -4, -1).join('-');
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 12) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (parseInt(value.substr(0, 2), 10) > 21 || value.substr(0, 2) === '00') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (value.substr(2, 6) === '000000') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (value.substr(8, 3) !== '001') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const [front, check] = strings.splitAt(value, 11);
const sum = weightedSum(front, {
weights: [4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2],
modulus: 11,
});
const digit = String(pymod(-sum, 11));
if (check !== digit) {
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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