Simple RSS

using System;
using System.Xml;

namespace RavSoft
{
	/// <summary>
	/// An item contained in an RSS feed.
	/// </summary>
	public class RSSItem
	{
    /////////////
    // Operations

    /// <summary>
    /// Creates an RSSItem from an element in an channel feed.
    /// </summary>
    /// <param name="element">Element in channel feed.</param>
    /// <returns>Created RSSItem or null if an error occured.</returns>
    public static RSSItem createFromElement
      (XmlElement element)
    {
      // Get item title - fail if missing
      XmlNodeList elements = element.GetElementsByTagName ("title");
      if (elements.Count == 0)
         return (null);
      XmlElement ele = elements.Item (0) as XmlElement;
      string strTitle = ele.InnerText;
      strTitle = StringParser.removeHtml (strTitle);

      // Get item link - fail if missing
      elements = element.GetElementsByTagName ("link");
      if (elements.Count == 0)
         return (null);
      ele = elements.Item (0) as XmlElement;
      string strLink = ele.InnerText;
      strLink = strLink.Replace ("<![CDATA[", "");
      strLink = strLink.Replace ("]]>", "");
      strLink = strLink.Trim();

      // Get optional author
      string strAuthor = "";
      elements = element.GetElementsByTagName ("author");
      if (elements.Count != 0) {
          ele = elements.Item (0) as XmlElement;
          strAuthor = ele.InnerText.Trim();
      }

      // Get optional description
      string strDesc = "";
      elements = element.GetElementsByTagName ("description");
      if (elements.Count != 0) {
          ele = elements.Item (0) as XmlElement;
          strDesc = ele.InnerText.Trim();
      }
      strDesc = StringParser.removeHtml (strDesc);

      // Get optional publication timestamp
      string strPublished = "";
      elements = element.GetElementsByTagName ("pubDate");
      if (elements.Count != 0) {
          ele = elements.Item (0) as XmlElement;
          strPublished = ele.InnerText;

          // Remove trailing GMT offset if present
          if (strPublished.Length > 6) {
              char[] chPublished = strPublished.ToCharArray();
              char ch = chPublished[ strPublished.Length - 5];
              if ((ch == '-') || (ch == '+'))
                 strPublished = strPublished.Remove (strPublished.Length - 5, 5);
          }
          strPublished = strPublished.Trim();
      }

      // Return item
      RSSItem rssItem = new RSSItem();
      rssItem.m_strTitle = strTitle;
      rssItem.m_strLink = strLink;
      rssItem.m_strAuthor = strAuthor;
      rssItem.m_strDescription = strDesc;
      rssItem.m_strPublished = strPublished;
      return (rssItem);
    }

    /////////////
    // Properties

    /// <summary>
    /// The item's title.
    /// </summary>
    public string Title {
      get {
        return m_strTitle;
      }
    }

    /// <summary>
    /// The item's description.
    /// </summary>
    public string Description {
      get {
        return m_strDescription;
      }
    }

    /// <summary>
    /// The item's link.
    /// </summary>
    public string Link {
      get {
        return m_strLink;
      }
    }

    /// <summary>
    /// The item's author.
    /// </summary>
    public string Author {
      get {
        return m_strAuthor;
      }
    }

    /// <summary>
    /// The item's publication timestamp.
    /// </summary>
    public DateTime Published {
      get {
        DateTime tmPublished = DateTime.MinValue;
        try {
          tmPublished = DateTime.Parse (m_strPublished);
        } catch (Exception) {
          // Nothing to do
        }
        return tmPublished;
      }
    }

    /// <summary>
    /// The item's publication timestamp as a string.
    /// </summary>
    public string PublishedAsString {
      get {
        return m_strPublished;
      }
    }

    /////////////
    // Attributes

    /// <summary>Item title.</summary>
    string m_strTitle = "";

    /// <summary>Link to item.</summary>
    string m_strLink = "";

    /// <summary>Item author.</summary>
    string m_strAuthor = "";

    /// <summary>Item description.</summary>
    string m_strDescription = "";

    /// <summary>Publication timestamp.</summary>
    string m_strPublished = "";
	}
}