Added two-way push messaging support.

firebase.js

@@ -0,0 +1,72 @@
+/**
+* @description MeshCentral Firebase communication module
+* @author Ylian Saint-Hilaire
+* @copyright Intel Corporation 2018-2021
+* @license Apache-2.0
+* @version v0.0.1
+*/
+
+/*xjslint node: true */
+/*xjslint plusplus: true */
+/*xjslint maxlen: 256 */
+/*jshint node: true */
+/*jshint strict: false */
+/*jshint esversion: 6 */
+"use strict";
+
+// Construct the Firebase object
+module.exports.CreateFirebase = function (parent, senderid, serverkey) {
+    var obj = {};
+    obj.messageId = 1;
+
+    const Sender = require('node-xcs').Sender;
+    const Message = require('node-xcs').Message;
+    const Notification = require('node-xcs').Notification;
+    const xcs = new Sender(senderid, serverkey);
+
+    // Messages received from client (excluding receipts)
+    xcs.on('message', function (messageId, from, data, category) {
+        console.log('Firebase-Message', messageId, from, data, category);
+    });
+
+    // Only fired for messages where options.delivery_receipt_requested = true
+    /*
+    xcs.on('receipt', function (messageId, from, data, category) { console.log('Firebase-Receipt', messageId, from, data, category); });
+    xcs.on('connected', function () { console.log('Connected'); });
+    xcs.on('disconnected', function () { console.log('disconnected'); });
+    xcs.on('online', function () { console.log('online'); });
+    xcs.on('error', function (e) { console.log('error', e); });
+    xcs.on('message-error', function (e) { console.log('message-error', e); });
+    */
+
+    xcs.start();
+
+    //var payload = { notification: { title: command.title, body: command.msg }, data: { url: obj.msgurl } };
+    //var options = { priority: 'High', timeToLive: 5 * 60 }; // TTL: 5 minutes, priority 'Normal' or 'High'
+
+    // Send an outbound push notification
+    obj.sendToDevice = function (token, payload, options, func) {
+        // Built the on-screen notification
+        var notification = null;
+        if (payload.notification) {
+            var notification = new Notification('ic_launcher')
+                .title(payload.notification.title)
+                .body(payload.notification.body)
+                .build();
+        }
+
+        // Build the message
+        var message = new Message('msg_' + (++obj.messageId));
+        if (options.priority) { message.priority(options.priority); }
+        if (payload.data) { for (var i in payload.data) { message.addData(i, payload.data[i]); } }
+        if (notification) { message.notification(notification) }
+        message.build();
+
+        // Send the message
+        function callback(result) { callback.func(result.getMessageId(), result.getError(), result.getErrorDescription()) }
+        callback.func = func;
+        xcs.sendNoRetry(message, token, callback);
+    }
+
+    return obj;
+};