using System;

using System.Drawing;

using System.Drawing.Imaging;

using System.Globalization;

using System.IO;

using System.Net;

using System.Web;

using System.Web.Caching;

 

public class PdcCountdownImage : IHttpHandler

{

  public bool IsReusable

  {

    get { return true; }

  }

 

  /// <summary>

  /// Processes the request.

  /// </summary>

  /// <param name="ctx">CTX.</param>

  public void ProcessRequest(HttpContext ctx)

  { 

 

    Byte[] imageBytes = null;

 

    // Check if the cache contains the image.

    Object cachedImageBytes = HttpRuntime.Cache.Get("PDCBYTES");

 

    // We have some cached bytes, use em!

    if (cachedImageBytes != null)

    {

      imageBytes = cachedImageBytes as byte [];

    }

    else

    {   

      // Gotta go get the PDC image, hope they don't change the location

      System.Net.WebClient webClient = new WebClient();

      byte [] pdcImageBytes = webClient.DownloadData("http://msdn.microsoft.com/events/pdc/images/home_pdc_masthead.gif");

      using(Image inputImage = Image.FromStream(new MemoryStream(pdcImageBytes)))

      using(Image outputImage = new Bitmap(inputImage))

      { 

        using(Graphics g = Graphics.FromImage(outputImage))

        {

 

          IFormatProvider culture = new CultureInfo("en-US", true);

          DateTime pdcStartDate =

            DateTime.Parse("9/13/2005",

            culture,

            DateTimeStyles.NoCurrentDateDefault);

 

          DateTime pdcEndDate =

            DateTime.Parse("9/16/2005",

            culture,

            DateTimeStyles.NoCurrentDateDefault);

 

 

          DateTime today = DateTime.Today;

 

          string message = String.Empty;

 

          if(today < pdcStartDate)

          {

            message = String.Format("It's in {0} days!", (pdcStartDate - today).Days);

          }

          else if(today >= pdcStartDate && today <= pdcEndDate)

          {

            message = " It's on baby!";         

          }

          else

          {

            message = "  It's over baby!";

          }

 

          using(Font font = new Font("Arial", 16))

          {

            g.DrawString(message, font, Brushes.Gray,1,1);

          }       

 

          using(MemoryStream stream = new MemoryStream())

          {

            outputImage.Save(stream, ImageFormat.Jpeg);

            imageBytes = stream.GetBuffer();

          }

 

          HttpRuntime.Cache.Add("PDCBYTES", imageBytes, null,

            today.AddDays(1), new TimeSpan(0, 0, 0),

            CacheItemPriority.Normal, null);

        }       

 

      }   

    }

 

    ctx.Response.Cache.SetExpires(DateTime.Today.AddDays(1));

    ctx.Response.Cache.SetCacheability(HttpCacheability.Public);

    ctx.Response.Cache.SetValidUntilExpires(true); 

    ctx.Response.ContentType = "image/jpg";

    ctx.Response.BufferOutput = false;

    ctx.Response.OutputStream.Write(imageBytes, 0, imageBytes.Length);

    ctx.Response.End(); 

  }

}