BreadcrumbManager.cs

using Sitecore.Data.Fields;
using Sitecore.Data.Items;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
using System.Web;

namespace Heinz.Opal.Custom.OreIda.Controls
{

  /// <summary>
	/// 
	/// </summary>
	public static class BreadcrumbManager
	{


		/// <summary>
		/// Builds the breadcrumb from item.
		/// </summary>
		/// <param name="item">The item to build a breadcrumb from.</param>
		/// <param name="fieldName">Name of the field on the current item to start the breadcrumb.</param>
		/// <returns></returns>
		public static BreadcrumbList BuildBreadcrumbFromItem(Item item)
		{
			if (item == null)
				throw new ArgumentNullException("The item parameter cant be null"); 

			BreadcrumbList list = new BreadcrumbList();

			Item homeItem = CurrentDB.GetItem(Sitecore.Context.Site.StartPath);
			Item rootNav = CurrentDB.GetItem(OreIda.Data.TemplateIDs.NavRoot);
			Item navItem = rootNav.Axes.SelectSingleItem(String.Format(".//*[@SourceNode = '{0}']", item.ID));


			while (navItem.TemplateID != OreIda.Data.TemplateIDs.NavSection && navItem.TemplateID != homeItem.TemplateID)
			{
				bool excludeFromNav = ((CheckboxField)navItem.Fields["ExcludeFromNavigation"]).Checked;
				if (!excludeFromNav)
				{
					Item src = CurrentDB.GetItem(new Sitecore.Data.ID(navItem.Fields["SourceNode"].Value));
					list.Add(new BreadcrumbItem(navItem.Name, GetTitleFromNavItem(navItem), OreIda.LinkManager.GetLink(src)));
				}
				navItem = navItem.Parent;
				if (navItem.TemplateID == OreIda.Data.TemplateIDs.NavSection)
				{
					list.NavItemName = navItem.Name;
				}
			}
			return list;
		}

		/// <summary>
		/// Gets the title of the specified nav Item.
		/// </summary>
		/// <param name="navItem">The nav item to get the title for.</param>
		/// <returns></returns>
		private static String GetTitleFromNavItem(Item navItem)
		{
			return (navItem.Fields["Title"] == null || String.IsNullOrWhiteSpace(navItem.Fields["Title"].Value)) ? navItem.Fields["Name"].Value : navItem.Fields["Title"].Value;
		}


	}


	/// <summary>
	/// 
	/// </summary>
	public class BreadcrumbList : List<BreadcrumbItem>
	{

		/// <summary>
		/// Gets a value indicating whether this instance has nav item.
		/// </summary>
		public bool HasNavItem
		{
			get { return !String.IsNullOrEmpty(NavItemName); }
		}

		/// <summary>
		/// Gets or sets the name of the nav item.
		/// </summary>
		public String NavItemName { get; set; }

		/// <summary>
		/// Gets the trail of this breadcrumb list.
		/// </summary>
		public String Trail
		{
			get { return JoinTrail(this); }
		}


		/// <summary>
		/// Joins the trail provided into a single string delimited by underscores.
		/// </summary>
		/// <param name="trail">The trail to join together.</param>
		/// <returns></returns>
		public static String JoinTrail(List<String> trail)
		{
			return String.Join("_", trail);
		}


		/// <summary>
		/// Joins the trail provided into a single string delimited by underscores.
		/// </summary>
		/// <param name="trail">The trail to join together.</param>
		/// <returns></returns>
		public static String JoinTrail(BreadcrumbList trail)
		{
			List<String> list = new List<string>();
			foreach (BreadcrumbItem item in trail)
				list.Add(item.Name);
			return JoinTrail(list);
		}

		/// <summary>
		/// Gets joins all the items in this breadcrumb list and joins them together.
		/// </summary>
		/// <returns></returns>
		public String GetFullTrail()
		{
			return JoinTrail(this.ConvertAll(x => x.Name).ToList<String>());
		}

	}


	/// <summary>
	/// 
	/// </summary>
	public class BreadcrumbItem
	{

		/// <summary>
		/// Initializes a new instance of the <see cref="BreadcrumbItem" /> class.
		/// </summary>
		public BreadcrumbItem(String name, String title, String link)
		{
			Name = name;
			Title = title;
			Link = link;
		}


		/// <summary>
		/// Gets or sets the name of the item in the tree in sitecore.
		/// </summary>
		public String Name { get; set; }

		/// <summary>
		/// Gets or sets the title for display purposes.
		/// </summary>
		public String Title { get; set; }

		/// <summary>
		/// Gets or sets the url to link to.
		/// </summary>
		public String Link { get; set; }

	}

}