stdnum
Version:
Standard Number Validation
51 lines • 4.29 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const impl = {
name: 'Taiwanese Business Administration Number',
localName: '',
abbreviation: 'UBN',
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 !== 8) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const weights = [1, 2, 1, 2, 1, 2, 4, 1];
const digits = weights
.map((w, idx) => String(parseInt(value[idx], 10) * w))
.join('');
const sum = digits
.split('')
.reduce((acc, d) => (acc + parseInt(d, 10)) % 10, 0);
if (!(sum === 0 || (sum === 9 && value[6] === '7'))) {
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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