chore: Add migration helper functions

migrations/utils/connect.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const MongoClient = require('mongodb').MongoClient;
+const logger = require('./logger');
+
+let db;
+
+function connectToDb (dbUri) {
+  return new Promise((resolve, reject) => {
+    MongoClient.connect(dbUri, (err, database) => {
+      if (err) {
+        logger.error(`Uh oh... Problem connecting to the database at ${dbUri}`);
+        return reject(err);
+      }
+
+      db = database;
+
+      logger.success(`Connected to ${dbUri}`);
+
+      resolve(database);
+    });
+  });
+}
+
+function closeDb () {
+  if (db) db.close();
+
+  logger.success('CLosed connection to the database');
+  return Promise.resolve();
+}
+
+module.exports = {
+  connectToDb,
+  closeDb,
+}