@ap-mitch/nfc-pcsc/src/NFC.js

Easy reading and writing NFC tags and cards

"use strict";

import pcsclite from "@ap-mitch/pcsclite";
import EventEmitter from "events";
import Reader from "./Reader";
import ACR12XReader from "./ACR12XReader";

class NFC extends EventEmitter {
	pcsc = null;
	logger = null;

	constructor(logger) {
		super();

		this.pcsc = pcsclite();

		if (logger) {
			this.logger = logger;
		} else {
			this.logger = {
				log: function() {},
				debug: function() {},
				info: function() {},
				warn: function() {},
				error: function() {}
			};
		}

		this.pcsc.on("reader", reader => {
			this.logger.debug("new reader detected", reader.name);

			// create special object for ARC12XU reader with commands specific to this reader
			if (reader.name.toLowerCase().indexOf("acr12") !== -1) {
				const device = new ACR12XReader(reader, this.logger);

				this.emit("reader", device);

				return;
			}

			const device = new Reader(reader, this.logger);

			this.emit("reader", device);
		});

		this.pcsc.on("error", err => {
			this.logger.error("PCSC error", err.message);

			this.emit("error", err);
		});
	}

	get readers() {
		return this.pcsc.readers;
	}

	close() {
		this.pcsc.close();
	}
}

export default NFC;