mailapi/index.js

'use strict'

require('dotenv').config()
const express = require('express')
const app = express()
const {verify} = require('hcaptcha')
const PORT = process.env.PORT || 8080

const mailer = require('nodemailer').createTransport({
	host: process.env.MAIL_SERVER,
	port: 587,
	auth: {
		user: process.env.MAIL_USER,
		pass: process.env.MAIL_PASS,
	},
	tls: {
		rejectUnauthorized: false,
	},
})

app.use(express.json())
app.post('/', async (req, res) => {
//	console.log(`Received token: ${req.body['token']}`)
	
	// Check token
	let data
	try {
		data = await verify(process.env.HCAPTCHA_SECRET, req.body['token'])
	} catch (err) {
		console.error(`Failed to check hcaptcha\n${err}`)
		return res.sendStatus(500)
	}
	if (data.success === true) {

		// Parse from address		
		let from
		if (req.body['name'] && req.body['email']) from = `${req.body['name']} <${req.body['email']}>`
		else if (req.body['name']) from = req.body['name']
		else if (req.body['email']) from = req.body['email']
		else from = 'Anonymous'

		// Send email
		let mail_res;
		try {
			console.log(`Sending email from ${from} to ${process.env.MAIL_TO}...`)
			mail_res = await mailer.sendMail({
				from: process.env.MAIL_FROM,
				replyTo: from,
				to: process.env.MAIL_TO,
				subject: req.body['subj'],
				text: req.body['msg'],
			})
		} catch (err) {
			console.error(err)
			return res.sendStatus(500)
		}
		console.log(`Sent email ${mail_res.messageId}`)
		return res.sendStatus(200)

	// hcaptcha failed
	} else {
		console.log(`Failed hCaptcha with errors: ${data['error-codes']}`)
		return res.sendStatus(403)
	}
})

app.listen(PORT, () => {
	console.log(`API listening on ${PORT}`)
})