stdnum
Version:
Standard Number Validation
52 lines • 4.55 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
import { luhnChecksumDigit } from '../util/checksum';
const entityTypes = 'ABCDEFGHJNPQRSUVW';
const letterCheckDigits = 'JABCDEFGHI';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const impl = {
name: 'Spanish Company Tax Number',
localName: 'Código de Identificación Fiscal',
abbreviation: 'CIF',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return strings.splitAt(value, 1, 8).join('-');
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 9) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
const [first, body, check] = strings.splitAt(value, 1, 8);
if (!strings.isdigits(body) ||
!entityTypes.includes(first) ||
!(strings.isdigits(check) || letterCheckDigits.includes(check))) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const cs = parseInt(luhnChecksumDigit(body), 10);
const possibleCheckDigits = letterCheckDigits[cs] + String(cs);
if (!possibleCheckDigits.includes(check)) {
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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