stdnum
Version:
Standard Number Validation
58 lines • 4.52 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
function clean(input) {
let [value, err] = strings.cleanUnicode(input, ' -.');
if (err !== null) {
return [value, err];
}
if (value.startsWith('BE')) {
value = value.substr(2);
}
if (value.startsWith('(0)')) {
value = `0${value.substr(3)}`;
}
if (value.length === 9) {
value = `0${value}`;
}
return [value, null];
}
const impl = {
name: 'Belgian VAT Number',
localName: 'Ondernemingsnummer',
abbreviation: 'BTW, NWSt',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return value;
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 10) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const [front, sum] = strings.splitAt(value, -2);
if (97 - (parseInt(front, 10) % 97) !== parseInt(sum, 10)) {
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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