stdnum
Version:
Standard Number Validation
72 lines • 5.89 kB
JavaScript
import * as exceptions from '../exceptions';
import { isValidDate, strings } from '../util';
function clean(input) {
return strings.cleanUnicode(input, ' ');
}
const CHECK_ALPHA = '0123456789ABCDEFHJKLMNPRSTUVWXY';
const CENTURY = {
'+': '18',
'-': '19',
Y: '19',
X: '19',
W: '19',
V: '19',
U: '19',
A: '20',
B: '20',
C: '20',
D: '20',
E: '20',
F: '20',
};
const VALID_CENTURY = Object.keys(CENTURY);
const impl = {
name: 'Finnish Personal Identity Code',
localName: 'Henkilötunnus',
abbreviation: 'HETU',
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 !== 11) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
const [front, , back, check2] = strings.splitAt(value, 6, 7, -1);
if (!strings.isdigits(front) ||
!strings.isdigits(back) ||
!CHECK_ALPHA.includes(check2)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (!VALID_CENTURY.includes(value[6])) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const [dd, mm, yy, century, person, check] = strings.splitAt(value, 2, 4, 6, 7, 10);
if (!isValidDate(`${CENTURY[century]}${yy}`, mm, dd, true)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const checkable = `${dd}${mm}${yy}${person}`;
if (CHECK_ALPHA[parseInt(checkable, 10) % CHECK_ALPHA.length] !== check) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: true,
isCompany: false,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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