lux-utils
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JS library to validate and format common Luxembourgish administrative data.
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<h1 class="page-title">validateMatricule/index.js</h1>
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<pre class="prettyprint source linenums"><code>/**
* @memberof LuxUtils
* @function validateMatricule
* @description Returns `true` if the matricule is valid
* @param {integer} matriculeToValidate matricule to validate
* @returns {boolean} `true` or `false`
*
* @example
* // validate a matricule
* let isValid = LuxUtils.validateMatricule(1893120105732); //true;
*
*/
export default (matriculeToValidate) => {
if (!Number.isInteger(matriculeToValidate)) return false;
const matriculeToValidateString = matriculeToValidate.toString();
if (matriculeToValidateString.length !== 13) return false;
const strippedMatricule = parseInt(matriculeToValidateString.substr(0, 11), 10);
const luhn = parseInt(matriculeToValidateString.substr(11, 1), 10);
const verhoeff = parseInt(matriculeToValidateString.substr(12, 1), 10);
if (!validateVerhoeff(strippedMatricule, verhoeff)) return false;
if (!validateLuhn(strippedMatricule, luhn)) return false;
return true;
};
function validateVerhoeff(strippedMatricule, verhoeff) {
return generate(strippedMatricule) === verhoeff;
}
function validateLuhn(strippedMatricule, luhn) {
return calculateLuhn(strippedMatricule.toString()) === luhn;
}
const d = [
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 2, 3, 4, 0, 6, 7, 8, 9, 5],
[2, 3, 4, 0, 1, 7, 8, 9, 5, 6],
[3, 4, 0, 1, 2, 8, 9, 5, 6, 7],
[4, 0, 1, 2, 3, 9, 5, 6, 7, 8],
[5, 9, 8, 7, 6, 0, 4, 3, 2, 1],
[6, 5, 9, 8, 7, 1, 0, 4, 3, 2],
[7, 6, 5, 9, 8, 2, 1, 0, 4, 3],
[8, 7, 6, 5, 9, 3, 2, 1, 0, 4],
[9, 8, 7, 6, 5, 4, 3, 2, 1, 0],
];
// permutation table p
const p = [
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
[1, 5, 7, 6, 2, 8, 3, 0, 9, 4],
[5, 8, 0, 3, 7, 9, 6, 1, 4, 2],
[8, 9, 1, 6, 0, 4, 3, 5, 2, 7],
[9, 4, 5, 3, 1, 2, 6, 8, 7, 0],
[4, 2, 8, 6, 5, 7, 3, 9, 0, 1],
[2, 7, 9, 3, 8, 0, 6, 4, 1, 5],
[7, 0, 4, 6, 9, 1, 3, 2, 5, 8],
];
const computed = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9];
// inverse table inv
const inv = [0, 4, 3, 2, 1, 5, 6, 7, 8, 9];
function sumLuhn(digits, even) {
let sum = 0,
digit = 0,
i = digits.length;
while (i--) {
digit = Number(digits[i]);
sum += (even = !even) ? computed[digit] : digit;
}
return sum;
}
function calculateLuhn(digits) {
const sum = sumLuhn(digits, false);
return (sum * 9) % 10;
}
// converts string or number to an array and inverts it
function invArray(array) {
if (Object.prototype.toString.call(array) === '[object Number]') {
array = String(array);
}
if (Object.prototype.toString.call(array) === '[object String]') {
array = array.split('').map(Number);
}
return array.reverse();
}
// generates checksum
function generate(array) {
let c = 0;
const invertedArray = invArray(array);
for (let i = 0; i < invertedArray.length; i++) {
c = d[c][p[(i + 1) % 8][invertedArray[i]]];
}
return inv[c];
}
</code></pre>
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