stdnum
Version:
Standard Number Validation
58 lines • 4.8 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const impl = {
name: 'Single Banking Code',
localName: 'Clave Bancaria Uniforme',
abbreviation: 'CBU',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
const [a, b] = strings.splitAt(value, 8);
return `${a} ${b}`;
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 22) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const [front, c1, back, c2] = strings.splitAt(value, 7, 8, 21);
const s1 = String(10 -
weightedSum(front, {
reverse: true,
weights: [3, 1, 7, 9, 3, 1, 7],
modulus: 10,
}));
const s2 = String(10 -
weightedSum(back, {
reverse: true,
weights: [3, 1, 7, 9, 3, 1, 7, 9, 3, 1, 7, 9, 3, 1],
modulus: 10,
}));
if (s1 !== c1 || s2 !== c2) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: false,
isCompany: false,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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