/**
 * Simple Websocket javascript
 * @todo Live Data
 * @description Don't miss data that changes even for a second
 * @author Dimas Lanjaka <dimaslanjaka[at]gmail.com
 * @see https://www.webmanajemen.com/p/simple-websocket.html Simple Web Socket
 */
var socket;

function socket_start(host) {
    if (!host) {
        console.error('Host websocket empty');
        return;
    }
    if (!socket_check()) {
        console.log('WebSocket Started');
        socket = socket_server(host);
    }
    try {

        socket.onopen = function (msg) {
            console.log('socket initialized');
        };
        socket.onmessage = function (msg) {
            var data = JSON.parse(msg.data);
            //do with data response
            console.log(data);
        };

        socket.onclose = function (msg) {
            console.log({
                closed: socket
            });
        };
    } catch (ex) {
        console.log(ex);
    }
}

function socket_server(host) {
    if (!host) {
        console.error('Host websocket empty');
        return;
    }
    console.log('Socket Initialized');
    if (!window.EventSource) {
        var socket = new EventSource(host);
    } else {

        var socket = new WebSocket(host);
    }
    return socket;
}

function socket_stop() {
    if (socket != null) {
        console.log("WebSocket Stopped");
        socket.close();
        socket = null;
    }
}

function socket_check() {
    return socket;
}