stdnum
Version:
Standard Number Validation
59 lines • 5.09 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: 'Polish Statistical Identificaiton Number',
localName: 'Rejestr Gospodarki Narodowej',
abbreviation: 'REGON',
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 !== 9 && value.length !== 14) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const [front, check, , check2] = strings.splitAt(value, 8, 9, -1);
const sum = weightedSum(front, {
weights: [8, 9, 2, 3, 4, 5, 6, 7],
modulus: 11,
});
if (String(sum % 10) !== check) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
if (value.length === 14) {
const sum2 = weightedSum(value.substring(0, 13), {
weights: [2, 4, 8, 5, 0, 9, 7, 3, 6, 1, 2, 4, 8],
modulus: 11,
});
if (String(sum2 % 10) !== check2) {
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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