index.js

import express from 'express';
import dotenv from 'dotenv';
import cors from 'cors';
import morgan, { format } from 'morgan';
import mongoose from 'mongoose';
import nodemailer from 'nodemailer'
import pdf from 'html-pdf';
import { dirname } from 'path';
import { fileURLToPath } from 'url';
import puppeteer from 'puppeteer';

// import routes
import profileRoutes from './routes/Profile.js';
import userRoutes from './routes/User.js';
import recordRoutes from './routes/Record.js';
import clientRoutes from './routes/Client.js';

import pdfTemplate from './Templates/record.js';
import emailTemplate from './Templates/email.js';


dotenv.config();
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

// --- Creating a express App -----
const app = express();

// --- Middleware -----
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(cors());
app.use(morgan('common'));

// --- conneting to mongodb -----
mongoose.connect(process.env.DB_CONNECTION, { useNewUrlParser: true, useUnifiedTopology: true })
    .then(() => console.log('MongoDB Connected'))
    .catch(err => console.log(err));


// --- Routes -----
app.use('/profiles', profileRoutes);// edit profile routes 
app.use('/users', userRoutes);// authentication routes -> signup, login, forgot password
app.use('/clients', clientRoutes);// client routes
app.use('/records', recordRoutes);// record routes



//Nodemailer for pdf sending 
const transporter = nodemailer.createTransport({
    port: process.env.SMTP_PORT,
    host: process.env.SMTP_HOST,
    auth: {
        user: process.env.SMTP_USER,
        pass: process.env.SMTP_PASSWORD
    }
});

// const options = {
//     format: 'A4',
// }

// sending pdf via email

app.post('/send-pdf', async (req, res) => {
    const { email, company } = req.body;
    try {
        // pdf.create(pdfTemplate(req.body), options).toFile('record.pdf', (err) => {
        //     if (err) return console.log(err);

        // launch a new chrome instance
        const browser = await puppeteer.launch({
            headless: true
        })

        // create a new page
        const page = await browser.newPage()

        // set your html as the pages content
        const html = pdfTemplate(req.body);
        // console.log("type of html -> ", typeof(html))
        // console.log("html page -> ", html)
        await page.setContent(html, {
            waitUntil: 'domcontentloaded'
        })

        // or a .pdf file
        await page.pdf({
            format: 'A4',
            path: `${__dirname}/record.pdf`
        })

        const mailOptions = {
            from: `${company?.buisnessName ? company?.buisnessName : "apnaKhata.netlify.app"} <Hello@apnakhata.netlify.app>`,// sender address
            to: `${email}`,// list of receivers
            replyTo: `${company?.email}`,
            subject: ` Record bill from ${company?.buisnessName ? company?.buisnessName : "apnakhata.netlify.app"}`,// Subject line
            text: ` Record bill from ${company?.buisnessName ? company?.buisnessName : "apnakhata.netlify.app"}`,// plain text body
            html: emailTemplate(req.body),
            attachments: [
                {
                    filename: 'record.pdf',
                    path: `${__dirname}/record.pdf`
                }
            ]

        }

        transporter.sendMail(mailOptions, (err, info) => {
            if (err) {
                console.log(err);
            }
            console.log('Message sent: %s', info);
        })
        res.status(200).json({ message: 'Email sent' });
        // close the browser
        await browser.close()


    } catch (err) {
        console.log(err);
        res.status(500).json(`Internal Server Error - ${err}`)
    }
})

// creating a pdf
app.post('/create-pdf', async (req, res) => {
    try {
        // launch a new chrome instance
        const browser = await puppeteer.launch({
            headless: true
        })

        // create a new page
        const page = await browser.newPage()

        // set your html as the pages content
        const html = pdfTemplate(req.body);
        // console.log("type of html -> ", typeof(html))
        // console.log("html page -> ", html)
        await page.setContent(html, {
            waitUntil: 'domcontentloaded'
        })

        // or a .pdf file
        await page.pdf({
            format: 'A4',
            path: `${__dirname}/record.pdf`
        })

        res.json(Promise.resolve())
        // close the browser
        await browser.close()
    } catch (err) {
        console.log(err);
        res.status(500).json(`Internal Server Error - ${err}`)
    }
})

app.get('/get-pdf', (req, res) => {
    res.sendFile(`${__dirname}/record.pdf`);
})


// --------- Starting a server -----------
const port = process.env.PORT || 8000;

app.get('/', (req, res) => {
    res.send('root route of the app');
})

app.listen(port, (req, res) => {
    console.log('server is running on port ' + port);
})