@parkersoftware/whoson-lib/SharedWorker.js

Useful whoson related library

"use strict";
var _self = self;
var _ports = [];
var _ws = null;
var _connected;
var _ackWait = 30000; //30secs
var _ack = false;
var _ackTimer;
_self.onconnect = function (e) {
    var port = e.ports[0];
    port.addEventListener('message', function (eventMessage) {
        switch (eventMessage.data[0]) {
            case "socket.connect":
                if (_connected) {
                    port.postMessage(["socket.opened"]);
                    return;
                }
                _connected = true;
                _ws = new WebSocket(eventMessage.data[1]);
                bindEvents();
                break;
            case "socket.send":
                _ws.send(eventMessage.data[1]);
                break;
            case "socket.close":
                _ws.close(1000, "Socket Closing");
                break;
        }
    });
    _ports.push(port);
    port.start(); // Required when using addEventListener. Otherwise called implicitly by onmessage setter.
};
function bindEvents() {
    _ws.onopen = function (e) {
        sendToAll(["socket.opened"]);
    };
    _ws.onmessage = function (e) {
        clearTimeout(_ackTimer);
        sendToAll(["socket.message", e.data]);
    };
    _ws.onclose = function (e) {
        sendToAll(["socket.closed"]);
        _connected = false;
    };
    _ws.onerror = function (e) {
        sendToAll(["socket.error", e]);
    };
}
function sendToAll(message) {
    _ports.forEach(function (port) { return port.postMessage(message); });
}
setInterval(function () {
    if (_ws == null ||
        _connected === false)
        return;
    self.send("noop");
}, 30000);
function send(cmdName) {
    var msg = {
        Command: "" + cmdName
    };
    startAck();
    _ws.send(JSON.stringify(msg));
}
function startAck() {
    _ack = false;
    if (typeof (_ackTimer) !== "undefined" && _ackTimer !== null)
        clearTimeout(_ackTimer);
    _ackTimer = setTimeout(function () {
        sendToAll(["socket.ack.timer.elapsed", null]);
    }, _ackWait);
}