Reduce environment variables number + optimise code

backend/server.js

@@ -4,17 +4,12 @@ const minio = require('minio');
 
   /*============== VARIABLE DECLARATION ==============*/
 // Mongo set-up variables
-const mongoEndpoint = process.env.ME_CONFIG_MONGODB_SERVER;
-const mongoPort = parseInt(process.env.ME_CONFIG_MONGODB_PORT);
-const mongoDatabase = process.env.ME_CONFIG_MONGODB_DB;
-const mongoCollection = process.env.ME_CONFIG_MONGODB_COLLECTION;
+const mongoCollection = process.env.MONGO_COLLECTION || 'eventlog';
+const mongoUri = process.env.MONGO_URI || 'mongodb://127.0.0.1:27017/default?replicaSet=rs0';
 
 // Minio set-up variables
-const minioEndpoint = process.env.MINIO_ENDPOINT;
-const minioBucket = process.env.MINIO_BUCKET;
-const minioPort = parseInt(process.env.MINIO_SERVING_PORT);
-const minioKey = process.env.MINIO_ACCESS_KEY;
-const minioSecret = process.env.MINIO_SECRET_KEY;
+const minioURI = new URL(process.env.MINIO_URI || 'http://kspace-mugshot:2mSI6HdbJ8@127.0.0.1:9000/kspace-mugshot');
+const minioBucket = minioURI.pathname.substring(1);
 
 // Stream set-up variables
 let changeStream;
@@ -23,24 +18,18 @@ const pipeline = [];
 const PORT = process.env.PORT || 3002;
 
 // Create Mongo client
-const MONGO_URI = `mongodb://${mongoEndpoint}:${mongoPort}`;
-const mongoClient = new MongoClient(MONGO_URI);
+const mongoClient = new MongoClient(mongoUri);
 
 
 /*============== CODE ==============*/
 async function run() {
 
-  console.log('server.js has been launched')
-
+  console.log('server.js has been launched');
   const app = express();
 
   // Configuring mongoDB connection
   await mongoClient.connect();
-  const database = mongoClient.db(mongoDatabase);
-  const collection = database.collection(mongoCollection);
-
-  // Notify connection
-  console.log(`Connection established with Mongo Database at ${MONGO_URI}`);
+  const collection = mongoClient.db().collection(mongoCollection);
 
   // Opening event listener on the database
   changeStream = collection.watch(pipeline, options);
@@ -50,18 +39,18 @@ async function run() {
     let eventArray = [];
 
     let minioClient = new minio.Client({
-      endPoint: minioEndpoint,
-      port: minioPort,
-      useSSL: false,
-      accessKey: minioKey,
-      secretKey: minioSecret
+      endPoint: minioURI.hostname,
+      port: parseInt(minioURI.port) || (minioURI.protocol == 'https' ? 443 : 80),
+      useSSL: minioURI.protocol == 'https',
+      accessKey: minioURI.username,
+      secretKey: minioURI.password
     });
 
     // notifies GET requests
     console.log('/events was requested');
 
     // Setting the header to event-stream for Server Sent Events (Eventsource)
-    const header = { 'Content-Type': 'text/event-stream', 'Connection': 'keep-alive' }
+    const header = { 'Content-Type': 'text/event-stream', 'Connection': 'keep-alive' };
     response.writeHead(200, "OK", header);
     response.write('Connection established \n\n');
 
@@ -79,7 +68,7 @@ async function run() {
           const realURL = JSON.stringify({ picUrl: presignedUrl });
           eventArray = [realURL, ...eventArray];
         })
-      }
+      };
 
       // sends updated array
       response.write(`data: [${[...eventArray]}]\n\n`);

frontend/default.conf

@@ -11,4 +11,6 @@ server {
         proxy_buffering off;
         proxy_pass http://127.0.0.1:3002/events;
     }
+
+
 }

frontend/src/components/app/App.js

@@ -4,7 +4,7 @@ import EventList from '../eventList/EventList.js';
 
 function App(props) {
   const [events, setEvents] = useState(['EventLog']); // initialises Event state
-  const [sse, setSse] = useState(new EventSource('/events', { withCredentials: true})) // creates eventSource listener
+  const [sse, setSse] = useState(new EventSource('/events', { withCredentials: true})) // creates eventSource listener in state
   
   useEffect(() => {