index.js

var fs = require('fs');

var http = require('http');
var https = require('https');
var request = require('request');
var zendesk = require('node-zendesk');
var exec = require('child_process').exec;
var util = require('util');
var pdf = require('html-pdf');

var category_id = 203290327;      // replace with your category_id

var zenClient = zendesk.createClient({
	username:  'mnyemail@myemail.com',
	token:     'mytoken',
	remoteUri: 'https://myurl.zendesk.com/api/v2/help_center',
    helpcenter: true
});

var articles = {},
	sections = [],
	htmlOutput = '<style type="text/css"> @font-face {font-family:"regular";src: url("/font/HelveticaLTStd-Roman_gdi.eot");src: url("/font/HelveticaLTStd-Roman_gdi.eot?#iefix") format("embedded-opentype"),url("/font/HelveticaLTStd-Roman_gdi.woff") format("woff"),url("/font/HelveticaLTStd-Roman_gdi.ttf") format("truetype"),url("/font/HelveticaLTStd-Roman_gdi.svg#HelveticaLTStd-Roman") format("svg");font-weight: 200;font-style: normal;font-stretch: normal;unicode-range: U+0020-25CA;}body{font-size: 11px; line-height: 14px; font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;} img{max-width: 500px;} .page-break{ display: block; page-break-before: always; }</style>'
	+ '<p style="clear: both;"><h1 style="float:right; font-size: 38px;">User Guide</h1></p>'
	+ '<div style="height: 100px;"></div>'
	+ '<p style="clear: both;">This User Guide was generated directly from the online ZenQMS Knowledgebase. Please visit the support section for the latest articles, related video tutorials and product announcements. </p>'
	+ '<div style="height: 100px;"></div>'
	+ '<p style="font-weight: 600;">STATEMENT OF OWNERSHIP</p>'
	+ '<div class="page-break"></div>';
var options = { 
	format: 'Letter', 
	timeout: 100000,
	border: {
	    top: '0.7in',            // default is 0, units: mm, cm, in, px
	    right: '0.3in',
	    bottom: '0.5in',
	    left: '0.3in'
  	},
  	header: {
	    height: '0mm',
	    contents: ''
	 },
  	quality: 200,
  	footer: {
	    height: '0mm',
	    contents: ''
	  },
	footer: {
		height: "0.2in",
		contents: {
		  default: '<span style="color: #444; float: right;">{{page}}</span>', // fallback value
		}
	},
 
};

getSections();

function getArticles(){
	zenClient.articles.listByCategory(category_id, function(err, request, result){
		for (var i = 0; i < result.length; i++) {

			var sec = sections.find(function(index){
				return index.id === result[i].section_id;
			});

			if(articles[sec.name] == null){
				articles[sec.name] = [];
			}
			
			articles[sec.name].push({
				title: result[i].title,
				body: result[i].body,
			});
		}
		generateHTML();
	});
}

function getSections(){
	zenClient.sections.list(function(err, request, result){
		sections = result;
	});
	getArticles();
}

function generateHTML(){
	var headers = '<div style="page-break-before:always;">',
		body = "",
		j = 1;
	
	for(key in articles){
		headers += util.format('<div style="color: rgb(88, 154, 214); ">%s.0 %s</div>', j, key);
		body += util.format('<h2>%s.0 %s</h2>', j, key);
		for (var i = 0; i < articles[key].length; i++) {
			var headIndex = i.toString();
			if(headIndex.length < 2) headIndex = '0' + headIndex;
			headers += util.format('<div>%s.%s %s</div>', j, headIndex ,articles[key][i].title);
			body += util.format('<h3>%s.%s %s</h3>', j, headIndex,  articles[key][i].title);
			body +=  articles[key][i].body;
			body += '<br>';
		}
		j++;
	}
	
	headers += '</div>';
	headers += '<div class="page-break"></div>';
	htmlOutput += headers + body;
	createPDFFile(htmlOutput);
}

function createPDFFile(){
	pdf.create(htmlOutput, options).toFile('./userKnowledge.pdf', function(err, res) {
	  if (err) return console.log(err);
	  console.log(res); // { filename: '/app/businesscard.pdf' }
	});
}

function createHTMLFile(){
	fs.writeFile('test.html', htmlOutput, function(err) {
		if(err) {
			//console.log(err);
			throw err;
		} else {
			console.log("written into file");
		}
	});
}