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Viewing file:     ITF.js (703 B)      -rw-r--r--

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;