fitlien-services/functions/src/email/sendEmail.ts

import { onRequest } from "firebase-functions/v2/https";
import { Request } from "firebase-functions/v2/https";
import { getCorsHandler } from "../shared/middleware";
import { getLogger } from "../shared/config";
import formData from 'form-data';
import Mailgun from 'mailgun.js';
const { convert } = require('html-to-text');

const mailgun = new Mailgun(formData);
const logger = getLogger();
const corsHandler = getCorsHandler();
export const sendEmailMessage = onRequest({
    region: '#{SERVICES_RGN}#'
}, (request: Request, response) => {
    return corsHandler(request, response, async () => {
        const mailGunClient = mailgun.client({ username: 'api', key: process.env.MAILGUN_API_KEY! });

        const toAddress = request.body.toAddress;
        const subject = request.body.subject;
        const message = request.body.message;
        const options = {
            wordwrap: 130,
        };

        const textMessage = convert(message, options);
        mailGunClient.messages.create(process.env.MAILGUN_SERVER!, {
            from: process.env.MAILGUN_FROM_ADDRESS,
            to: toAddress,
            subject: subject,
            text: textMessage,
            html: message
        }).then((res: any) => {
            logger.info(res);
            response.send(res);
        }).catch((err: any) => {
            logger.error(err);
            response.send(err);
        });
    });
});