stdnum
Version:
Standard Number Validation
69 lines • 6.68 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings } from '../util';
import { weightedSum } from '../util/checksum';
const PREFIX = ['УНП', 'УНП', 'UNP', 'UNP'];
const alphabet = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ';
function clean(input) {
const [value, err] = strings.cleanUnicode(input, ' -/');
if (err !== null) {
return [value, err];
}
const v2 = PREFIX.reduce((acc, p) => acc || (!value.startsWith(p) ? acc : value.substr(p.length)), null);
return [v2 !== null && v2 !== void 0 ? v2 : value, null];
}
const impl = {
name: 'Belarus VAT Number',
localName: 'Учетный номер плательщика',
abbreviation: 'УНП (UNP)',
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 !== 9) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value.substr(2))) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (!strings.isdigits(value[0]) && !'1234567ABCEHKM'.includes(value[0])) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
if (!strings.isdigits(value[1]) && !'ABCEHKMOPT'.includes(value[1])) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
const [front, check] = strings.splitAt(value, -1);
let frontClean = front;
if (!strings.isdigits(front.substr(0, 2))) {
const vv = String('ABCEHKMOPT'.indexOf(front[1]));
frontClean = `${front[0]}${vv}${front.substr(2)}`;
}
const sum = weightedSum(frontClean, {
modulus: 11,
weights: [29, 23, 19, 17, 13, 7, 5, 3],
alphabet,
});
if (sum === 10 || String(sum) !== check) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: true,
isCompany: true,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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