stdnum
Version:
Standard Number Validation
62 lines • 4.68 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
function clean(input) {
return strings.cleanUnicode(input, ' -');
}
const PAN_HOLDER_TYPES = {
A: 'Association of Persons (AOP)',
B: 'Body of Individuals (BOI)',
C: 'Company',
F: 'Firm/Limited Liability Partnership',
G: 'Government Agency',
H: 'Hindu Undivided Family (HUF)',
L: 'Local Authority',
J: 'Artificial Juridical Person',
P: 'Individual',
T: 'Trust',
K: 'Krish (Trust Krish)',
};
const VALID_PAN_HOLDERS = Object.keys(PAN_HOLDER_TYPES);
const impl = {
name: 'Indian Income Tax Identifier',
localName: 'Permanent Account Number',
abbreviation: 'PAN',
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 (!/^[A-Z]{5}[0-9]{4}[A-Z]$/.test(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (!VALID_PAN_HOLDERS.includes(value[3])) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const [, foo] = strings.splitAt(value, 5, 9);
if (foo === '0000') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
return {
isValid: true,
compact: value,
isIndividual: false,
isCompany: true,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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