refactor: rename package

packages/db-mongo/src/client/connection.ts

@@ -0,0 +1,27 @@
+import { Db, MongoClient } from 'mongodb';
+
+const connStr = process.env.FAAS_MONGO_URL || 'mongodb://192.168.0.2:27017';
+const dbName = process.env.FAAS_MONGO_DB || "faas";
+
+export class MongoDBConnection {
+    private static isConnected: boolean = false;
+    private static db: Db;
+
+    public static getConnection(result: (connection: Db) => void) {
+        if (this.isConnected) {
+            return result(this.db);
+        } else {
+            this.connect((error: Error, db: Db) => {
+                return result(this.db);
+            });
+        }
+    }
+
+    private static connect(result: (error: Error, db: Db) => void) {
+        MongoClient.connect(connStr, { useNewUrlParser: true }, (err, client) => {
+            this.db = client.db(dbName);
+            this.isConnected = true;
+            return result(err, this.db);
+        });
+    }
+}