gistfile1.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml;

namespace TOCParser
{
    public class XHtmlDocParser
    {
        private XmlNamespaceManager _mgr;

        public Navigator ParseTOC(string documentPath)
        {
            if (!File.Exists(documentPath))
            {
                throw new FileNotFoundException("The document to parse is not found.", documentPath);
            }

            XmlDocument doc = new XmlDocument();
            doc.XmlResolver = null;
            try
            {
                doc.Load(documentPath);
                _mgr = new XmlNamespaceManager(doc.NameTable);
                _mgr.AddNamespace("xhtml", "http://www.w3.org/1999/xhtml");
                var tocNode = doc.SelectSingleNode(@"//xhtml:div[@id='wkb_view_toc']", _mgr);
                if (tocNode != null)
                {
                    var navigators = GetTocItemNodes(tocNode);
                    if (navigators.Count > 0)
                    {
                        // We only expect one tocitem as the root.
                        return navigators[0];
                    }
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Could not load document: " + documentPath);
                Console.WriteLine(ex.Message);
            }

            return null;
        }

        public Navigator ParseLinks(string documentPath)
        {
            if (!File.Exists(documentPath))
            {
                throw new FileNotFoundException("The document to parse is not found.", documentPath);
            }

            XmlDocument doc = new XmlDocument();
            doc.XmlResolver = null;
            try
            {
                doc.Load(documentPath);
                _mgr = new XmlNamespaceManager(doc.NameTable);
                _mgr.AddNamespace("xhtml", "http://www.w3.org/1999/xhtml");
                var linkNodes = doc.SelectNodes(@"//xhtml:div[@id='wkb_view_links']", _mgr);
                var navigator = new Navigator();
                foreach (XmlNode node in linkNodes)
                {
                    Console.WriteLine(node.OuterXml);
                    navigator.Children.Add(new Navigator
                        {

                        }
                    );
                }

                return navigator;
            }
            catch (Exception ex)
            {
                Console.WriteLine("Could not load document: {0} : {1}", documentPath, ex.Message);
            }

            return null;
        }

        private List<Navigator> GetTocItemNodes(XmlNode itemContainer)
        {
            var navigatorItems = new List<Navigator>();

            var tocItemNodes = itemContainer.SelectNodes(@"xhtml:div[contains(@class, 'tocitem')]", _mgr);
            foreach (XmlNode tocItemNode in tocItemNodes)
            {
                var navigatorItem = new Navigator
                {
                    Identifier = tocItemNode.Attributes["id"].Value,
                    DisplayLabel = tocItemNode.FirstChild.InnerText,
                    Description = tocItemNode.FirstChild.InnerText,
                    Expandable = true,
                    ParentIdentifier = itemContainer.Attributes["id"].Value
                };
                
                navigatorItem.Children = new List<Navigator>();
                var tocLeafNodes = GetTocLeafNodes(tocItemNode);                
                tocLeafNodes.ForEach(x => navigatorItem.Children.Add(x));

                var tocItemChildrenNodes = this.GetTocItemNodes(tocItemNode);
                tocItemChildrenNodes.ForEach(x => navigatorItem.Children.Add(x));

                navigatorItem.ItemCount = navigatorItem.Children.Count;
                navigatorItems.Add(navigatorItem);
            }

            return navigatorItems;
        }

        private List<Navigator> GetTocLeafNodes(XmlNode leafContainer)
        {
            var navigatorItems = new List<Navigator>();
            var tocLeafNodes = leafContainer.SelectNodes(@"xhtml:div[contains(@class, 'tocleaf')]", _mgr);
            foreach (XmlNode tocLeafNode in tocLeafNodes)
            {
                navigatorItems.Add(new Navigator
                {
                    Identifier = tocLeafNode.Attributes["id"].Value,
                    DisplayLabel = tocLeafNode.FirstChild.InnerText,
                    Description = tocLeafNode.FirstChild.InnerText,
                    Expandable = false,
                    ItemCount = 0,
                    ParentIdentifier = leafContainer.Attributes["id"].Value
                });
            }

            return navigatorItems;
        }
    }   
}