documentid-checksum-validator/lib/RU/inn.js

checksum validation for government doc ids

'use strict';

Object.defineProperty(exports, '__esModule', {
    value: true
});
exports['default'] = isValidDocId;

function isValidDocId(value) {
    var valueArray = value.split('');
    var valid = true;
    if (valueArray.length < 12 || valueArray.length > 12) {
        valid = false;
    } else {
        // standard multiplier for the control of 11th didgit
        var controleleventhDigitMultiplier = [7, 2, 4, 10, 3, 5, 9, 4, 6, 8];
        // standard multiplier for the control of 12th digit
        var controltwelthDigitMulitplier = [3, 7, 2, 4, 10, 3, 5, 9, 4, 6, 8];
        var sumElevenDigits = 0;
        var sumTenDigits = 0;

        for (var i = 0; i < controleleventhDigitMultiplier.length; i++) {
            sumTenDigits += controleleventhDigitMultiplier[i] * valueArray[i];
        }

        for (var j = 0; j < controltwelthDigitMulitplier.length; j++) {
            sumElevenDigits += controltwelthDigitMulitplier[j] * valueArray[j];
        }

        var controlEleventhDigit = sumTenDigits - Math.floor(sumTenDigits / 11) * 11;
        var controlTwelthDigit = sumElevenDigits - Math.floor(sumElevenDigits / 11) * 11;

        if (controlEleventhDigit === 10) {
            controlEleventhDigit = 0;
        } else if (controlTwelthDigit === 10) {
            controlTwelthDigit = 0;
        }

        if (controlEleventhDigit === valueArray[10] && controlTwelthDigit === valueArray[11]) {
            valid = true;
        } else {
            valid = false;
        }
    }
    return valid;
}

module.exports = exports['default'];