Refactored - now includes fullstack AUTH

server/utils/app.js

@@ -0,0 +1,20 @@
+const express = require('express') // Backend App (server)
+const cors = require('cors') // HTTP headers (enable requests)
+const {ORIGIN} = require('../constants')
+
+// initialize app
+const app = express()
+
+// middlewares
+app.use(cors({origin: ORIGIN}))
+app.use(express.json({extended: true})) // body parser
+app.use(express.urlencoded({extended: false})) // url parser
+
+// error handling
+app.use((err, req, res, next) => {
+  console.error(err)
+  res.status(500).send()
+  next()
+})
+
+module.exports = app

server/utils/mongo.js

@@ -0,0 +1,32 @@
+const mongoose = require('mongoose')
+const {MONGO_URI} = require('../constants')
+const {MONGO_OPTIONS} = require('../constants')
+
+class MongoDB {
+  constructor() {
+    this.mongoose = mongoose
+    this.isConnected = false
+    this.MONGO_URI = MONGO_URI
+    this.MONGO_OPTIONS = MONGO_OPTIONS
+  }
+
+  async connect() {
+    if (this.isConnected) return
+
+    try {
+      const db = await this.mongoose.connect(this.MONGO_URI, this.MONGO_OPTIONS)
+      const connection = db.connection
+
+      this.isConnected = connection.readyState === 1
+      if (this.isConnected) console.log('✅ MongoDB connected')
+
+      connection.on('connected', () => console.log('✅ MongoDB connected')) // re-connected
+      connection.on('disconnected', () => console.log('❌ MongoDB disconnected')) // disconnected
+      connection.on('error', (error) => console.log('❌ MongoDB connection error', error)) // listen for errors during the session
+    } catch (error) {
+      console.log('❌ MongoDB connection error:', error.message)
+    }
+  }
+}
+
+module.exports = new MongoDB()