Firebase Functions Send Mail

comments.md

Send mails from firebase using nodemailer and firestore

FIREBASE FUNCTIONS CONFIG

https://firebase.google.com/docs/functions/config-env?hl=es-419

Set config

firebase functions:config:set gmail.email='someEmail' gmail.password='somePass'

Get config

firebase functions:config:get

Or

const functions = require('firebase-functions');

console.log(functions.config().gmail.email);
console.log(functions.config().gmail.password);

index.js

'use strict';

const functions = require('firebase-functions');
const admin = require('firebase-admin');

const sendMail = require('./mail');

admin.initializeApp(functions.config().firebase);

exports.sendMail = functions.firestore
	.document('mails/{mailId}')
	.onCreate(snap => {
		const { destination, title, body, html } = snap.data();

		return sendMail({
			destination,
			//
			title,
			body,
			html,
		})
			.then(res => console.log(res))
			.catch(err => console.log(err));
	});

mail.js

'use strict';

//If you use gmail (recommended option)
//  Allow access to your google account from this link https://accounts.google.com/b/0/DisplayUnlockCaptcha
//  And allow access for less secure applications https://myaccount.google.com/lesssecureapps

const nodemailer = require('nodemailer');
const functions = require('firebase-functions');

exports = module.exports = ({
	senderName = 'AppName',
	destination,
	//
	title = 'Default title',
	body = 'Default body',
	html = null,
	user = functions.config().gmail.email,
	pass = functions.config().gmail.password,
}) => {
	return new Promise((resolve, reject) => {

		const transporter = nodemailer.createTransport({
			host: 'smtp.gmail.com',
			port: 587,
			secure: false,
			auth: { user, pass }
		});

		transporter.sendMail({
			from: `${senderName} ${user}`,
			to: destination,
			subject: title,
			html: html || `<p>${body}</p>`
		}, (err, res) => {
			if (err) reject(err);
			else resolve(res);
			transporter.close();
		});
	});
};