stdnum
Version:
Standard Number Validation
61 lines • 5.21 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
import { iso7064mod10x11validate } from '../util/iso7064';
function clean(input) {
return strings.cleanUnicode(input, ' -./,');
}
const impl = {
name: 'German Personal Tax Number',
localName: 'Steuerliche Identifikationsnummer',
abbreviation: 'IdNr',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value;
},
format(input) {
const [value] = clean(input);
return strings.splitAt(value, 2, 5, 8).join(' ');
},
validate(input) {
const [value, error] = clean(input);
if (error) {
return { isValid: false, error };
}
if (value.length !== 11) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (value[0] === '0') {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
const counter = {};
value
.substr(0, 10)
.split('')
.map(v => parseInt(v, 10))
.forEach(v => {
var _a;
counter[v] = ((_a = counter[v]) !== null && _a !== void 0 ? _a : 0) + 1;
});
const more = Object.values(counter).filter(v => v > 1);
if (more.length !== 1 && [2, 3].includes(more[0])) {
return { isValid: false, error: new exceptions.InvalidComponent() };
}
if (!iso7064mod10x11validate(value)) {
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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