stdnum
Version:
Standard Number Validation
60 lines • 5.47 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: 'South Korean Business Registration Number',
localName: '사업자 등록 번호',
abbreviation: 'BRN',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return strings.splitAt(value, 3, 5).join('-');
},
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 [head, mid, end, check] = strings.splitAt(value, 3, 5, 9);
if (parseInt(head, 10) < 101) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (mid === '00') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (end === '0000') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const sum = weightedSum(value.substr(0, 9), {
modulus: 10,
weights: [1, 3, 7, 1, 3, 7, 1, 3, 5],
});
const extra = Math.floor((parseInt(end[3], 10) * 5) / 10);
if (String((10 - ((sum + extra) % 10)) % 10) !== 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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