Barcode Generation

node_modules/jsbarcode/src/barcodes/ITF/ITF.js

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+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;