add 500 error email middleware (#273)

Author: devarshishimpi

apps/web/backend/index.js

@@ -1,6 +1,7 @@
 const express = require('express');
 const connectToMongo = require('./db');
 const cors = require('cors');
+const handleError = require('./middleware/error');
 
 const load = async () => {
     await connectToMongo();
@@ -10,6 +11,7 @@ const load = async () => {
 
     app.use(express.json());
     app.use(cors());
+
 
     // Available Routes
     app.use('/api/auth', require('./routes/auth'));
@@ -20,6 +22,9 @@ const load = async () => {
         res.send('Hi!');
     });
 
+    // Error handling middleware
+    app.use(handleError);
+    
     app.listen(PORT, () => {
         console.log(`The App is running at http://localhost:${PORT}`);
     });

apps/web/backend/middleware/error.js

@@ -0,0 +1,39 @@
+const nodemailer = require('nodemailer');
+const outlookEmail = process.env.outlookEmail;
+const outlookPassword = process.env.outlookPassword;
+
+const handleError = (err, req, res, next) => {
+    console.error(err.stack);
+    const statusCode = err.statusCode || 500;
+    const message = err.message || 'Internal Server Error';
+
+    console.log("Send message")
+
+    if (statusCode === 500) {
+    const transporter = nodemailer.createTransport({
+        service: 'hotmail',
+        auth: {
+            user: outlookEmail,
+            pass: outlookPassword
+        }
+    });
+
+    const mailOptions = {
+        from: outlookEmail,
+        to: outlookEmail,
+        subject: `Important!! : ${message}`,
+        text: `Stack Trace:\n${err.stack}`
+    };
+
+    transporter.sendMail(mailOptions, (error, info) => {
+        if (error) {
+        console.error(error);
+        } else {
+        console.log(`Email sent: ${info.response}`);
+        }
+    });
+    }
+    res.status(statusCode).send(message);
+}
+
+module.exports = handleError;