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import ITF from './ITF';
// Calculate the checksum digit
const checksum = (data) => {
const res = data
.substr(0, 13)
.split('')
.map(num => parseInt(num, 10))
.reduce((sum, n, idx) => sum + (n * (3 - (idx % 2) * 2)), 0);
return Math.ceil(res / 10) * 10 - res;
};
class ITF14 extends ITF {
constructor(data, options) {
// Add checksum if it does not exist
if (data.search(/^[0-9]{13}$/) !== -1) {
data += checksum(data);
}
super(data, options);
valid() {
return (
this.data.search(/^[0-9]{14}$/) !== -1 &&
+this.data[13] === checksum(this.data)
);
export default ITF14;