1

2025-08-12 15:04:01 +08:00
parent df3f5f5269
commit 6708fb8eeb
544 changed files with 75169 additions and 17 deletions
@@ -0,0 +1,37 @@
+import { START_BIN, END_BIN, BINARIES } from './constants';
+import Barcode from '../Barcode';
+
+class ITF extends Barcode {
+
+	valid() {
+		return this.data.search(/^([0-9]{2})+$/) !== -1;
+	}
+
+	encode() {
+		// Calculate all the digit pairs
+		const encoded = this.data
+			.match(/.{2}/g)
+			.map(pair => this.encodePair(pair))
+			.join('');
+
+		return {
+			data: START_BIN + encoded + END_BIN,
+			text: this.text
+		};
+	}
+
+	// Calculate the data of a number pair
+	encodePair(pair) {
+		const second = BINARIES[pair[1]];
+
+		return BINARIES[pair[0]]
+			.split('')
+			.map((first, idx) => (
+				(first === '1' ? '111' : '1') +
+				(second[idx] === '1' ? '000' : '0')
+			))
+			.join('');
+	}
+}
+
+export default ITF;
@@ -0,0 +1,33 @@
+import ITF from './ITF';
+
+// Calculate the checksum digit
+const checksum = (data) => {
+	const res = data
+		.substr(0, 13)
+		.split('')
+		.map(num => parseInt(num, 10))
+		.reduce((sum, n, idx) => sum + (n * (3 - (idx % 2) * 2)), 0);
+
+	return Math.ceil(res / 10) * 10 - res;
+};
+
+class ITF14 extends ITF {
+
+	constructor(data, options) {
+		// Add checksum if it does not exist
+		if (data.search(/^[0-9]{13}$/) !== -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;
@@ -0,0 +1,7 @@
+export const START_BIN = '1010';
+export const END_BIN = '11101';
+
+export const BINARIES = [
+	'00110', '10001', '01001', '11000', '00101',
+	'10100', '01100', '00011', '10010', '01010',
+];
@@ -0,0 +1,4 @@
+import ITF from './ITF';
+import ITF14 from './ITF14';
+
+export { ITF, ITF14 };