stdnum
Version:
Standard Number Validation
111 lines • 9.93 kB
JavaScript
import * as exceptions from '../exceptions';
import { isValidDateCompactYYYYMMDD, buildDate, strings } from '../util';
import { luhnChecksumValidate } from '../util/checksum';
const ONE_HUNDRED_YEARS_IN_MS = 100 * 365 * 24 * 60 * 60 * 1000;
function clean(input) {
const [value, err] = strings.cleanUnicode(input, ' :');
if (err) {
return [value, err];
}
const [a, b, c] = strings.splitAt(value, -5, -4);
return [`${a.replace(/[-+]/g, '')}${b}${c}`, null];
}
function formatImpl(input) {
const [value] = clean(input);
let front, back, sep = '-';
if (value.length === 12 || value.length === 13) {
const [yyyy, mm, dd] = strings.splitAt(value, 0, 4, 6, 8);
const d = buildDate(yyyy, mm, dd);
if (d === null) {
return value;
}
if (new Date().getTime() - d.getTime() > ONE_HUNDRED_YEARS_IN_MS) {
sep = '+';
}
front = `${yyyy.substring(2)}${mm}${dd}`;
back = value.substring(value.length - 4);
}
else if (value.length === 10) {
front = value.substring(0, 6);
back = value.substring(6);
}
else if (value.length === 11) {
front = value.substring(0, 6);
sep = value[6];
back = value.substring(7);
}
else {
return value;
}
return `${front}${sep}${back}`;
}
const impl = {
name: 'Swedish Personal Identity Number',
localName: 'Personnummer',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format: formatImpl,
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
let a, b, c;
if (value.length === 11) {
[a, b, c] = strings.splitAt(value, -5, -4);
}
else if (value.length === 13) {
[, a, b, c] = strings.splitAt(value, -11, -5, -4);
}
else {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!'-+'.includes(b)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const digits = `${a}${c}`;
if (!strings.isdigits(digits)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
let yyyymmdd;
if (value.length === 13) {
yyyymmdd = value.substring(0, 8);
}
else {
const yymmdd = value.substring(0, 6);
const year = new Date().getFullYear();
let century = Math.floor(year / 100);
if (parseInt(yymmdd.substring(0, 2), 10) > year % 100) {
century -= 1;
}
if (b === '+') {
century -= 1;
}
yyyymmdd = `${century}${yymmdd}`;
}
const day = parseInt(yyyymmdd.substring(6, 8), 10);
if (day > 60) {
yyyymmdd =
yyyymmdd.substring(0, 6) + (day - 60).toString().padStart(2, '0');
}
if (!isValidDateCompactYYYYMMDD(yyyymmdd, true)) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (!luhnChecksumValidate(digits)) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: formatImpl(input),
isIndividual: true,
isCompany: false,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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