supanextail/pages/api/mailingList.ts

import type { NextApiRequest, NextApiResponse } from 'next';

import Cors from 'cors';
import axios from 'axios';
import initMiddleware from 'utils/init-middleware';
import rateLimit from 'express-rate-limit';

export const config = {
	api: {
		externalResolver: true,
	},
};

const cors = initMiddleware(
	Cors({
		methods: ['PUT'],
	})
);

const limiter = initMiddleware(
	rateLimit({
		windowMs: 30000, // 30sec
		max: 2, // Max 2 request per 30 sec
	})
);

export default async function handler(req: NextApiRequest, res: NextApiResponse): Promise<void> {
	await cors(req, res);
	await limiter(req, res);
	if (req.method === 'PUT') {
		axios
			.put(
				'https://api.sendgrid.com/v3/marketing/contacts',
				{
					contacts: [{ email: `${req.body.mail}` }],
					list_ids: [process.env.SENDGRID_MAILING_ID],
				},
				{
					headers: {
						'content-type': 'application/json',
						Authorization: `Bearer ${process.env.SENDGRID_SECRET}`,
					},
				}
			)
			.then((result) => {
				console.log(result);
				res.status(200).send({
					message: 'Your email has been succesfully added to the mailing list. Welcome 👋',
				});
			})
			.catch((err) => {
				res.status(500).send({
					message:
						'Oups, there was a problem with your subscription, please try again or contact us',
					error: err,
				});
			});
	}
}