1

2025-08-12 15:04:01 +08:00
parent df3f5f5269
commit 6708fb8eeb
544 changed files with 75169 additions and 17 deletions
@@ -0,0 +1,33 @@
+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;