introduce mongodb connection

src/main.ts

@@ -1,13 +1,31 @@
 import * as Mqtt from 'mqtt'
+import * as Mongo from 'mongodb'
+
+
+var MQTT_BROKER_URL : String = 'mqtt://localhost'
+var MONGO_DATABASE_URL : String = 'mongodb://localhost/test'
+
 
 class MqttMongo {
   private mqttClient : Mqtt.Client
+  private dbHandle : Mongo.Db;
+  private msgCnt : number = 0;
 
   constructor() {
     this.mqttClient = Mqtt.connect(options['broker'])
     this.mqttClient.on('offline', () => { console.log("mqtt client is offline") })
     this.mqttClient.on('reconnect', () => { console.log("mqtt client is reconnecting") })
     this.mqttClient.on('close', () => { console.log("mqtt connection closed") })
+
+/*
+    Mongo.MongoClient.connect(options['database'])
+      .then(
+        (dbHandle: Mongo.Db) => { this.dbHandle = dbHandle },
+        (err: String) => {
+          console.log("Unable to connect to database: %s", err)
+        }
+    )
+*/
   }
 
   exec(): void {
@@ -18,9 +36,8 @@ class MqttMongo {
     })
 
     this.mqttClient.on('message', (topic : string, message : string) => {
-      console.log("message received")
-      console.log("topic %s", topic)
-      console.log("message %s", message)
+      this.msgCnt++;
+      console.log(`message received ${this.msgCnt}, topic ${topic}, payload ${message}`)
 
       if (topic == "MqttMongo/Command" && message == "shutdown") {
         this.mqttClient.end()
@@ -33,7 +50,8 @@ class MqttMongo {
 import options = require('commander')
 options
   .version('0.0.1')
-  .option('-b, --broker [broker url]', 'Broker URL', 'mqtt://mqttbroker')
+  .option('-b, --broker [broker url]', 'Broker URL', MQTT_BROKER_URL)
+  .option('-m, --database [database url]', 'MongoDB Database URL', MONGO_DATABASE_URL)
   .parse(process.argv)
 
 const mqttMongo = new MqttMongo()