server.js

'use strict';//strict mode
const express = require("express");
const body = require("body-parser");
const app = express();

app.set('view engine', 'ejs');
app.use(express.static(__dirname + "/public"));
app.use(body.urlencoded({ extended: true }));

app.get("/", function(req, res){
    res.render("home");
})


app.get("/submitForm", function(req,res){
    res.render("submitForm");
})

app.post("/generatePDF", function(req, res){
    /**
     * Initialization for pdfkit library
     */
    const PDFDocument = require('pdfkit');
    const fs = require('fs');
    console.log("generatePDF");
    
    const items = req.body;

    /**
     * Create PDF document with appropriate functions and file name
     */
    function createPdf(itemsJson, path) {
        let doc = new PDFDocument({ margin: 50 });
    
        generateHeader(doc);
        generateTable(doc, itemsJson);
    
        doc.end();
        doc.pipe(fs.createWriteStream(path));
    }

    /**
     * Generate a header for the pdf
     */
    function generateHeader(doc) {
        doc
            .image("logo.png", 50, 45, { width: 140 })
            .fillColor("#444444")
            .fontSize(10)
            .text("Name: " + items.name, 450, 65, {align: "left"})
            .text("Phone: " + items.phone, 450, 80, { align: "left" })
            .text("Email: " + items.email, 450, 95, { align: "left" })
            .moveDown();
    }
    
    /**
     * Generate each items as a row to the table into the pdf file
     */
    function generateTableRow(doc, y, c1, c2, c3, c4, c5) {

        if(c1 == "" || c1 == null)
        {
            doc
            .fontSize(10)
           
            .text(c2, 150, y)
            .text(c3, 280, y, { width: 90, align: "right" })
            .text(c4, 370, y, { width: 90, align: "right" })
            .text(c5, 0, y, { align: "right" });
        }
        else{
            doc
            .fontSize(10)
            .image(c1, 50, y, { width: 70 })
            .text(c2, 150, y)
            .text(c3, 280, y, { width: 90, align: "right" })
            .text(c4, 370, y, { width: 90, align: "right" })
            .text(c5, 0, y, { align: "right" });
        }
    }

    /**
     * Generate a table where for each loop the items in the json object.
     * Create column name for items ex.("image", "item", "description", "quantity", "price")
     */
    function generateTable(doc, items) {
        let i,
        itemsTableTop = 180;

        doc.font("Helvetica-Bold");
        doc
            .fontSize(10)
            .text("Image", 50, itemsTableTop)
            .text("Item", 150, itemsTableTop)
            .text("Description", 280, itemsTableTop, { width: 90, align: "right" })
            .text("Quantity", 370, itemsTableTop, { width: 90, align: "right" })
            .text("Price", 0, itemsTableTop, { align: "right" });

        generateHr(doc, itemsTableTop + 20);
        doc.font("Helvetica");

        for (i = 0; i < items.items.length; i++) {
            const item = items.items[i];
            const position = itemsTableTop + (i + 1) * 70;
            generateTableRow(
            doc,
            position,
            item.image,
            item.item,
            item.description,
            item.quantity,
            item.amount
            );
        }
    }

    /**
     * generate space 
     */
    function generateHr(doc, y) {
    doc
        .strokeColor("#aaaaaa")
        .lineWidth(1)
        .moveTo(50, y)
        .lineTo(550, y)
        .stroke();
    }

    createPdf(items, "SampleDocument.pdf");

})

// Take any port number of your choice which 
// is not taken by any other process 
app.listen(8080, function (error) {
    if (error) throw error
    console.log("Server created Successfully on PORT 8080")

})