index.js

const express = require('express');
const app = express();
const cors = require('cors');
const morgan = require('morgan');
const mongoose = require('mongoose');
const userRoute = require('./routes/user');
const interestRoute = require('./routes/interest');
const sgMail = require('@sendgrid/mail');

require('dotenv').config();

app.use(cors());
app.use(express.json());
app.use(morgan());
app.use(express.urlencoded({ extended: true }));

sgMail.setApiKey(process.env.SENDGRID_API_KEY);

app.post('/api/user/send-registration-email', async (req, res) => {
  try {
    const { userEmail, eventId } = req.body;
    if (!userEmail || !eventId) {
      return res.status(400).json({ message: 'User email or event ID not provided in the request body' });
    }

    const msg = {
      to: userEmail,
      from: 'akshat0133@gmail.com',
      subject: 'Registration Confirmation',
      text: 'Thank you for registering for our event! We look forward to seeing you there.',
      html: '<strong>Thank you for registering for our event! We look forward to seeing you there.</strong>',
    };

    await sgMail.send(msg);
    console.log('Email sent');
    res.json({ message: 'Email sent successfully' });
  } catch (error) {
    console.error('Error sending email:', error);
    res.status(500).json({ message: 'Error sending email' });
  }
});

const port = process.env.PORT || 8000;

app.use('/api/user', userRoute);
app.use('/api/interest', interestRoute);

async function connectToDatabase() {
  try {
    await mongoose.connect(process.env.MONGO_URI, {
      useNewUrlParser: true,
      useUnifiedTopology: true,
    });
    console.log('Connected to MongoDB');
    app.listen(port, () => {
      console.log(`Example app listening on port ${port}!`);
    });
  } catch (err) {
    console.error('Error connecting to MongoDB:', err);
  }
}

connectToDatabase();