feat: Integrate Sentry to backend (#270)

* feat: Integrate Sentry to backend

* update lock

* update .env

---------

Co-authored-by: Rotimi Best <best@classroomio.com>

apps/backend/server.js

@@ -4,6 +4,8 @@ const express = require('express');
 const rateLimit = require('express-rate-limit');
 const cors = require('cors');
 const bodyParser = require('body-parser');
+const sentry = require('@sentry/node');
+const { ProfilingIntegration } = require('@sentry/profiling-node');
 
 const uploadVideo = require('./src/routes/uploadVideo');
 const downloadCertificate = require('./src/routes/downloadCertificate');
@@ -12,14 +14,19 @@ const downloadCourse = require('./src/routes/downloadCourse');
 const katex = require('./src/routes/katex');
 const sendEmail = require('./src/routes/sendEmail');
 
+sentry.init({
+  dsn: process.env.SENTRY_DNS || '',
+  integrations: [new ProfilingIntegration()],
+  tracesSampleRate: 1.0,
+  profilesSampleRate: 1.0
+});
+
 // Express server
 const app = express();
-
 const port = process.env.PORT || 3002;
 
 app.use(express.json());
 app.use(bodyParser.urlencoded({ extended: true }));
-
 app.use(cors());
 
 // Rate limiting middleware
@@ -30,6 +37,11 @@ const limiter = rateLimit({
 
 app.use(limiter);
 
+// Integrate Sentry middleware
+app.use(sentry.Handlers.requestHandler());
+app.use(sentry.Handlers.errorHandler());
+
+// Register routes
 app.use('/downloadCertificate', downloadCertificate);
 app.use('/downloadLesson', downloadLesson);
 app.use('/downloadCourse', downloadCourse);
@@ -41,10 +53,23 @@ app.get('/', (req, res) => {
   res.send('Welcome to ClassroomIO');
 });
 
+// Start server
 app.listen(port, () => {
   console.log(`ClassroomIO Backend listening on port ${port}!`);
 });
 
+// Handle uncaught exceptions
 process.on('uncaughtException', (err) => {
-  console.error('Uncaught error, err');
+  console.error('Uncaught error', err);
+});
+
+// Error-handling middleware
+app.use((error, req, res, next) => {
+  console.error('Exception error caught:', error);
+
+  // Capture and send the error to Sentry
+  sentry.captureException(error);
+
+  // Respond with a 500 Internal Server Error
+  res.status(500).json({ error: 'Internal Server Error' });
 });