stdnum
Version:
Standard Number Validation
63 lines • 5.51 kB
JavaScript
import * as exceptions from '../exceptions';
import { strings, weightedSum } from '../util';
function clean(input) {
return strings.cleanUnicode(input, ' ');
}
const impl = {
name: 'Russian Tax Identifier',
localName: 'Идентификационный номер налогоплательщика',
abbreviation: 'ИНН',
compact(input) {
const [value, err] = clean(input);
if (err) {
throw err;
}
return value.toLocaleUpperCase();
},
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 && value.length !== 12) {
return { isValid: false, error: new exceptions.InvalidLength() };
}
if (!strings.isdigits(value)) {
return { isValid: false, error: new exceptions.InvalidFormat() };
}
let digit;
const [front, check] = strings.splitAt(value, value.length === 10 ? -1 : -2);
if (value.length === 10) {
digit = String(weightedSum(front, {
weights: [2, 4, 10, 3, 5, 9, 4, 6, 8],
modulus: 11,
}) % 10);
}
else {
const d1 = String(weightedSum(front, {
weights: [7, 2, 4, 10, 3, 5, 9, 4, 6, 8],
modulus: 11,
}) % 10);
const d2 = String(weightedSum(front + d1, {
weights: [3, 7, 2, 4, 10, 3, 5, 9, 4, 6, 8],
modulus: 11,
}) % 10);
digit = `${d1}${d2}`;
}
if (digit !== check) {
return { isValid: false, error: new exceptions.InvalidChecksum() };
}
return {
isValid: true,
compact: value,
isIndividual: value.length === 12,
isCompany: value.length === 10,
};
},
};
export const { name, localName, abbreviation, validate, format, compact } = impl;
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