connected to atlas

dist/mongosave.js

@@ -1,11 +1,48 @@
 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 const CallChain = require("./callchain");
+const log = require("./log");
+const MongoDB = require("mongodb");
 class MongoSave extends CallChain.ABaseChainItem {
-    constructor() {
+    constructor(url) {
         super('MongoSave');
+        this._url = url;
+        this._mongoClient = new MongoDB.MongoClient();
+        this._connectPending = false;
     }
     func(message) {
+        if (!this._dbh) {
+            log.info("Not database connection yet");
+            if (!this._connectPending) {
+                this._connectPending = true;
+                this._mongoClient.connect(this._url)
+                    .then((db) => {
+                    log.info("Successfully opened MongoDB connect");
+                    this._dbh = db;
+                })
+                    .catch((err) => {
+                    log.error(`Failure when opening MongoDB connect: ${err}`);
+                    this._dbh = undefined;
+                });
+            }
+            else {
+                log.info("Connecting to database is pending");
+            }
+        }
+        if (this._dbh) {
+            log.info("Database handle is available");
+            let coll = this._dbh.collection("iot");
+            coll.insertOne(message)
+                .then((res) => {
+                log.info(`Successfully wrote one item in database: ${res.insertedId}`);
+            })
+                .catch((err) => {
+                log.error(`Failure when trying to write one item in database: ${err}`);
+            });
+        }
+        else {
+            log.error(`No database connection yet, drop message ${message}`);
+        }
         return "<<" + message + ">>";
     }
 }