Game Attack Combos : WPF Hybrid Smart Client for Combo Calculations

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows;
using GGG.GameAttackCombos.Logic;

namespace GGG.GameAttackCombos.Client {

	/// <summary>
	/// Works with resources of the current skin of the application.
	/// </summary>
	public class CurrentSkinResource : IDisposable {

		// Last requested skin resource information.
		private string LastNameRequested;
		private Stream LastStreamRequested;


		/// <summary>
		/// Gets a Stream to a resource for the currently viewed skin of the application.
		/// </summary>
		/// <param name="resourceName">The name of the skin resource to retrieve.</param>
		/// <returns></returns>
		public Stream LoadResourceByName(string resourceName) {
			// Check if this resource was last requested.
			if (string.Compare(resourceName, LastNameRequested) != 0 || LastStreamRequested == null) {
				// Dispose of any previously requested stream to be safe.
				if (LastStreamRequested != null) {
					LastStreamRequested.Dispose();
				}

				// Store the name of the resource requested for comparison later.
				LastNameRequested = resourceName;

				// Get the main form.
				if (Application.Current != null) {
					MainWindow Main = Application.Current.MainWindow as MainWindow;
					if (Main != null) {
						// Open the current combo package being viewed.
						// TODO: Fix this! Copy the stream from the package to a memory stream.
						LastStreamRequested = File.Open(@"C:\Development\Applications\GameAttackCombos\Assets\Prince of Persia 2008\PrinceOfPersia2008Background.png", FileMode.Open, FileAccess.Read);
						//using (ComboPackage Package = Main.OpenCurrentComboPackage()) {
						//    LastStreamRequested = Package.OpenSkinResourceStream(resourceName);
						//}
					}
				}
			}

			return LastStreamRequested;
		}


		#region IDisposable Members

		/// <summary>
		/// Disposes of any remaining resources as a fail safe.
		/// </summary>
		public void Dispose() {
			// Dispose of any read stream that is still lingering.
			if (LastStreamRequested != null &&
				LastStreamRequested.CanSeek &&
				LastStreamRequested.Position >= LastStreamRequested.Length - 1) {
				// This should never be necessary because of the BitmapImage property 
				// CacheOption. It should be set to OnLoad from a skin file to dispose of the
				// stream itself. This is just a fail safe in case it is forgotten.
				LastStreamRequested.Dispose();
			}
		}

		#endregion
	}

}