google-utils-generate-auth-url.js

const { google } = require('googleapis');

require('dotenv').config()

// google app config
const googleConfig = {
    clientId: process.env.GOOGLE_CLIENT_ID,
    clientSecret: process.env.GOOGLE_CLIENT_SECRET,
    redirect: 'http://localhost:3000/auth/success'
}

// scopes use for the application
const defaultScope = [
    'https://www.googleapis.com/auth/calendar.events.readonly',
    'profile',
    'email'
]

// oauth2 client
function createConnection() {
    return new google.auth.OAuth2(
        googleConfig.clientId,
        googleConfig.clientSecret,
        googleConfig.redirect
    );
}

// generate authentication url
function getConnectionUrl(auth) {
    return auth.generateAuthUrl({
        access_type: 'offline',
        prompt: 'consent',
        scope: defaultScope
    });
}


// get auth url
module.exports.urlGoogle = function () {
    const auth = createConnection();
    const url = getConnectionUrl(auth);
    return url;
}