/**
 * C# RSS Feed Generator
 * By Adam Burmister, http://www.flog.co.nz, adam@flog.co.nz
 * 
 * Use freely, I don't care.
 */

/// 
/// Render a series of items as an RSS feed
/// 
public class feed : System.Web.UI.Page
{
	/** Struct for RSS Feed Items - currently targeted towards LanProwler client files,
	 * so customise as required
	 */
	public struct FeedItem
	{
		public string Title;
		public string URL;
		public string Description;
		public DateTime ModifiedDate;
		public FeedItem(string Title, string URL, DateTime ModifiedDate, string Description)
		{
			this.Title = Title;
			this.URL = URL;
			this.ModifiedDate = ModifiedDate;
			this.Description = Description;
		}
	};
	
	/* Constants */
	private const int MAX_ITEMS = 50;
	private const string BASE_URL = "http://adam:90/";
	
	/* Variables */
	private XmlTextWriter xwRSS = null;	/* XML writer - used for writing RSS feed */
	
	/* Load file list, start render of RSS feed */
	private void Page_Load(object sender, System.EventArgs e)
	{
		/** In this section of the code you load in your FeedItems array
		 * So for example’s sake:
		 */
		FeedItem [] items = new FeedItem[2];
	
		items[0] = new FeedItem("Flog", "http://www.flog.co.nz/", DateTime.Now, "My web site");
		items[1] = new FeedItem("For The Masses", "http://www.forthemasses.net/", DateTime.Now, "New Zealand design community news");
		RenderFeed("Example RSS Feed", BASE_URL, desc, items);
	}
	
	public void RenderFeed(string ChannelTitle, string ChannelURL, string ChannelDescription, FeedItem [] items)
	{
		HttpContext.Current.Response.Clear();
		HttpContext.Current.Response.ContentType = "text/xml";
	
		xwRSS = new XmlTextWriter(HttpContext.Current.Response.OutputStream, Encoding.UTF8);
	
		xwRSS.WriteStartDocument();
		xwRSS.WriteStartElement("RSS");
		xwRSS.WriteAttributeString("version","2.0");
		xwRSS.WriteStartElement("channel");
		xwRSS.WriteElementString("title", ChannelTitle);
		xwRSS.WriteElementString("link",ChannelURL);
		xwRSS.WriteElementString("description",ChannelDescription);
		xwRSS.WriteElementString("ttl","30");
		/* add any other RSS valid entries here */
		//xwRSS.WriteElementString("copyright","© 2000 - 2006 SomeCompany"); 
	
		for(int i=0; i<items .Length; i++)
		{
			FeedItem item = (FeedItem) items[i];
			if(item.Title != null)
			{
				WriteItem(item);
			}
		}
	
		xwRSS.WriteEndElement();
		xwRSS.WriteEndDocument();
		xwRSS.Flush();
		xwRSS.Close();
	}
	
	private void WriteItem(FeedItem f)
	{
		try
		{
			xwRSS.WriteStartElement("item");
			xwRSS.WriteElementString("title", date + " - " + f.Title);
			xwRSS.WriteElementString("description", f.Title);
			xwRSS.WriteElementString("link", f.URL);
	
			/* Write any other valid RSS item entries here if needed */
			//xwRSS.WriteElementString("link","URL");
			//xwRSS.WriteElementString("pubDate","Published Date");
			//xwRSS.WriteElementString("author","Author Name");
	
			xwRSS.WriteEndElement();
		}
		catch
		{
			throw;
		}
	}
}