/YUI/YUI.Core/Utilities/RssBase.cs

using System;

using System.Collections.Generic;

using System.Text;

using System.Xml;



namespace aNd1coder.Common

{

    /// <summary>

    /// Rss??

    /// </summary>

    public class RssBase

    {



        #region RssBase constructor

        public RssBase(XmlTextWriter rssWriter)

        {

            this.rssWriter = rssWriter;

        }

        public RssBase(XmlTextWriter rssWriter, bool hasMedia, IList<ItemInfo> items)

        {

            this.rssWriter = rssWriter;

            this.hasMedia = hasMedia;

            this.items = items;

        }

        #endregion



        [Serializable]

        public sealed class ItemInfo

        {



            #region ItemInfo constructor

            public ItemInfo() { }

            public ItemInfo(string itemTitle, string itemLink, string itemDescription, string itemPubDate, string itemAuthor, string itemGuid)

            {

                this.itemTitle = itemTitle;

                this.itemLink = itemLink;

                this.itemDescription = itemDescription;

                this.itemAuthor = itemAuthor;

                this.itemGuid = itemGuid;

                this.itemPubDate = itemPubDate;

            }

            public ItemInfo(string itemTitle, string itemLink, string itemDescription, string itemPubDate, string itemAuthor,

                           string itemGuid, string mediaContentUrl, string mediaTitle, string mediaDescription,

                           string mediaThumbUrl, string mediaThumbWidth, string mediaThumbHeight, string mediaAuthor)

            {

                this.itemTitle = itemTitle;

                this.itemLink = itemLink;

                this.itemDescription = itemDescription;

                this.itemPubDate = itemPubDate;

                this.itemAuthor = itemAuthor;

                this.itemGuid = itemGuid;

                this.mediaContentUrl = mediaContentUrl;

                this.mediaTitle = mediaTitle;

                this.mediaDescription = mediaDescription;

                this.mediaThumbUrl = mediaThumbUrl;

                this.mediaThumbWidth = mediaThumbWidth;

                this.mediaThumbHeight = mediaThumbHeight;

                this.mediaAuthor = mediaAuthor;

            }

            #endregion



            #region Internal item variables

            // Item variables

            private string itemTitle;

            private string itemLink;

            private string itemDescription;

            private string itemPubDate = DateTime.Now.ToString("r");

            private string itemDateTaken = DateTime.Now.ToString();

            private string itemAuthor;

            private string itemGuid;

            // Media variables

            private string mediaContentUrl;

            private string mediaTitle;

            private string mediaDescription;

            private string mediaThumbUrl;

            private string mediaThumbWidth;

            private string mediaThumbHeight;

            private string mediaAuthor;

            #endregion



            #region Item properties

            public string ItemTitle

            {

                set { itemTitle = value; }

                get { return itemTitle; }

            }

            public string ItemLink

            {

                set { itemLink = value; }

                get { return itemLink; }

            }

            public string ItemDescription

            {

                set { itemDescription = value; }

                get { return itemDescription; }

            }

            public string ItemPubDate

            {

                set { itemPubDate = value; }

                get { return itemPubDate; }

            }

            public string ItemDateTaken

            {

                set { itemDateTaken = value; }

                get { return itemDateTaken; }

            }

            public string ItemAuthor

            {

                set { itemAuthor = value; }

                get { return itemAuthor; }

            }

            public string ItemGuid

            {

                set { itemGuid = value; }

                get { return itemGuid; }

            }

            public string MediaContentUrl

            {

                set { mediaContentUrl = value; }

                get { return mediaContentUrl; }

            }

            public string MediaTitle

            {

                set { mediaTitle = value; }

                get { return mediaTitle; }

            }

            public string MediaDescription

            {

                set { mediaDescription = value; }

                get { return mediaDescription; }

            }

            public string MediaThumbUrl

            {

                set { mediaThumbUrl = value; }

                get { return mediaThumbUrl; }

            }

            public string MediaThumbWidth

            {

                set { mediaThumbWidth = value; }

                get { return mediaThumbWidth; }

            }

            public string MediaThumbHeight

            {

                set { mediaThumbHeight = value; }

                get { return mediaThumbHeight; }

            }

            public string MediaAuthor

            {

                set { mediaAuthor = value; }

                get { return mediaAuthor; }

            }

            #endregion



        }



        #region Const string

        private const string TITLE = "MyMedia RSS";

        private const string XMLNS_MEDIA = "http://www.MyWii.com.au";

        private const string XMLNS_DC = "http://purl.org/dc/elements/1.1/";

        private const string LINK = "http://www.MyWii.com.au/";

        private const string DESCRIPTION = "description";

        private const string LANGUAGE = "en-us";

        private const string COPYRIGHT = "Copyright 2006";

        private const string GENERATOR = "MyMedia RSS Generator";

        private const string IMAGE_URL = "http://www.MyWii.com.au/img/main/feed.gif";

        private const string IMAGE_TITLE = "MyWii";

        private const string IMAGE_LINK = "http://www.MyWii.com.au";

        private string PUB_DATE = DateTime.Now.ToString("r");

        private string LAST_BUILD_DATE = DateTime.Now.ToString("r");



        #endregion



        #region Internal member variables

        private XmlTextWriter rssWriter;

        private bool hasMedia;

        private IList<ItemInfo> items;

        #endregion





        #region Properties

        public XmlTextWriter RssWriter

        {

            set { rssWriter = value; }

            get { return rssWriter; }

        }

        public bool HasMedia

        {

            set { hasMedia = value; }

            get { return hasMedia; }

        }

        public IList<ItemInfo> Items

        {

            set { items = value; }

            get { return items; }

        }



        #endregion





        #region Private method



        private void WritePrologue()

        {

            rssWriter.WriteStartDocument();

            rssWriter.WriteStartElement("rss");

            rssWriter.WriteAttributeString("version", "2.0");

            rssWriter.WriteAttributeString("xmlns:media", XMLNS_MEDIA);

            rssWriter.WriteAttributeString("xmlns:dc", XMLNS_DC);

            rssWriter.WriteString("\n    ");

            // Write in channel block

            rssWriter.WriteStartElement("channel");

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("title", TITLE);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("link", LINK);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("description", DESCRIPTION);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("pubDate", PUB_DATE);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("lastBuildDate", LAST_BUILD_DATE);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("language", LANGUAGE);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("copyright", COPYRIGHT);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteElementString("generator", GENERATOR);

            rssWriter.WriteString("\n     ");

            // Write in image block

            rssWriter.WriteStartElement("image");

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("url", IMAGE_URL);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("title", IMAGE_TITLE);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("link", IMAGE_LINK);

            rssWriter.WriteString("\n     ");

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n     ");

        }



        /**/

        /// <summary>

        /// Write in items

        /// </summary>

        private void WriteItem(ItemInfo item)

        {

            // Write in item block

            rssWriter.WriteStartElement("item");

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("title", item.ItemTitle);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("link", item.ItemLink);

            rssWriter.WriteString("\n        ");



            rssWriter.WriteStartElement("description");

            rssWriter.WriteString("\n         ");

            rssWriter.WriteCData(item.ItemDescription);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteEndElement();



            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("pubDate", item.ItemPubDate);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("dc:date.Taken", item.ItemDateTaken);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("author", item.ItemAuthor);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteStartElement("guid");

            rssWriter.WriteAttributeString("isPermaLink", "false");

            rssWriter.WriteString(item.ItemGuid);

            rssWriter.WriteEndElement();





            // Write item media here



        }



        /**/

        /// <summary>

        /// Write in item media

        /// </summary>

        /// <param name="item">ItemInfo item</param>

        private void WriteItemMedia(ItemInfo item)

        {

            // Write in media

            rssWriter.WriteString("\n        ");

            rssWriter.WriteStartElement("media:content");

            rssWriter.WriteAttributeString("url", item.MediaContentUrl);

            rssWriter.WriteAttributeString("type", "image/jpeg");

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n        ");

            rssWriter.WriteElementString("media:title", item.MediaTitle);

            rssWriter.WriteString("\n        ");

            rssWriter.WriteStartElement("media:text");

            rssWriter.WriteAttributeString("type", "html");

            rssWriter.WriteString(item.MediaDescription);

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n        ");

            rssWriter.WriteStartElement("media:thumbnail");

            rssWriter.WriteAttributeString("url", item.MediaThumbUrl);

            rssWriter.WriteAttributeString("height", item.MediaThumbHeight);

            rssWriter.WriteAttributeString("width", item.MediaThumbWidth);

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n        ");

            rssWriter.WriteStartElement("media:credit");

            rssWriter.WriteAttributeString("role", "photographer");

            rssWriter.WriteString(item.MediaAuthor);

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n     ");



        }



        /**/

        /// <summary>

        /// Close item element 

        /// </summary>

        private void WriteItemEnd()

        {

            rssWriter.WriteString("\n     ");

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n     ");

        }



        /**/

        /// <summary>

        /// Close all the elements

        /// </summary>

        private void WriteEnd()

        {

            rssWriter.WriteEndElement();

            rssWriter.WriteString("\n");

            rssWriter.WriteEndElement();

            rssWriter.WriteEndDocument();

        }

        #endregion



        /**/

        /// <summary>

        /// Write RSS feed

        /// </summary>

        public void WriteRSS()

        {

            WritePrologue();

            foreach (ItemInfo info in items)

            {

                WriteItem(info);

                if (hasMedia)

                    WriteItemMedia(info);

                WriteItemEnd();

            }

            WriteEnd();

        }

    }

}