stdnum
Version:
Standard Number Validation
51 lines • 4.43 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
import { weightedSum } from '../util/checksum';
function clean(input) {
return strings.cleanUnicode(input, ' -.');
}
const impl = {
name: 'Swiss Business Identifier',
localName: 'Unternehmens-Identifikationsnummer',
abbreviation: 'UID',
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, 3, 6, 9);
return `${a}-${b}.${c}.${d}`;
},
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.substr(3)) || !value.startsWith('CHE')) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const [, front, check] = strings.splitAt(value, 3, -1);
const sum = weightedSum(front, {
modulus: 11,
weights: [5, 4, 3, 2, 7, 6, 5, 4],
});
if (String((11 - sum) % 11) !== 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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