// Copyright 2016 Google LLC

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

// http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

// [START gae_flex_sendgrid]

'use strict';

const express = require('express');

const path = require('path');

const bodyParser = require('body-parser');

// The following environment variables are set by app.yaml (app.flexible.yaml or

// app.standard.yaml) when running on Google App Engine,

// but will need to be manually set when running locally.

const {SENDGRID_API_KEY} = process.env;

const {SENDGRID_SENDER} = process.env;

const Sendgrid = require('@sendgrid/client');

Sendgrid.setApiKey(SENDGRID_API_KEY);

const app = express();

// Setup view engine

app.set('views', path.join(__dirname, 'views'));

app.set('view engine', 'pug');

// Parse form data

app.use(bodyParser.urlencoded({extended: false}));

app.get('/', (req, res) => {

res.render('index');

});

app.post('/hello', async (req, res, next) => {

const request = {

method: 'POST',

url: '/v3/mail/send',

body: {

personalizations: [

{

to: [{email: req.body.email}],

subject: 'Hello World!',

},

],

from: {email: SENDGRID_SENDER},

content: [

{

type: 'text/plain',

value: 'Sendgrid on Google App Engine with Node.js.',

},

],

},

};

// [END gae_flex_sendgrid]

if (req.query.test) {

request.mailSettings = {

sandboxMode: {

enable: true,

},

};

}

// [START gae_flex_sendgrid]

try {

await Sendgrid.request(request);

} catch (err) {

next(err);

return;

}

// Render the index route on success

res.render('index', {

sent: true,

});

});

// [END gae_flex_sendgrid]

if (module === require.main) {

const PORT = process.env.PORT || 8080;

app.listen(PORT, () => {

console.log(`App listening on port ${PORT}`);

console.log('Press Ctrl+C to quit.');

});

}

module.exports = app;