MagicMirror/modules/default/clock/node_helper.js

var http = require("http");
var NodeHelper = require("node_helper");

module.exports = NodeHelper.create({
	start: function () {
	},

	socketNotificationReceived: function (notification, payload) {
		var self = this;

		if (notification === "AUTO_TIMEZONE") {
			console.log("Loading timezone...");
			http.get("http://ip-api.com/json", function (req) {
				var data = "";
				req.on("data", function (d) {
					data += d;
				});
				req.on("end", function () {
					var body = JSON.parse(data);
					payload.timezone = body.timezone;
					self.sendSocketNotification("UPDATE_TIMEZONE", payload);
				});
			}).on("error", function () {
				payload.error = "Could not figure out the timezone.";
				self.sendSocketNotification("UPDATE_TIMEZONE", payload);
			});
		}
	}
});