/*************************************************************************** 
 *  RssFeedEnclosureWrapper.cs
 *
 *  Copyright (C) 2007 Michael C. Urbanski
 *  Written by Mike Urbanski <michael.c.urbanski@gmail.com>
 ****************************************************************************/
 
/*  THIS FILE IS LICENSED UNDER THE MIT LICENSE AS OUTLINED IMMEDIATELY BELOW: 
 *
 *  Permission is hereby granted,free of charge,to any person obtaining a
 *  copy of this software and associated documentation files (the "Software"), 
 *  to deal in the Software without restriction,including without limitation  
 *  the rights to use,copy,modify,merge,publish,distribute,sublicense, 
 *  and/or sell copies of the Software,and to permit persons to whom the  
 *  Software is furnished to do so,subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in 
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS",WITHOUT WARRANTY OF ANY KIND,EXPRESS OR 
 *  IMPLIED,INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,DAMAGES OR OTHER 
 *  LIABILITY,WHETHER IN AN ACTION OF CONTRACT,TORT OR OTHERWISE,ARISING 
 *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
 *  DEALINGS IN THE SOFTWARE.
 */

using System;
using System.Xml;

namespace Migo.Syndication.Data
{        
    class RssFeedEnclosureWrapper : IFeedEnclosureWrapper
    {
        private long length;
        private string type;        
        private string url;
          
        public bool Active 
        { 
            get { return true; }
        }        
                        
        public string DownloadMimeType 
        { 
            get { return String.Empty; } 
        }

        public string DownloadUrl 
        { 
            get { return String.Empty; } 
        }              
  
        public FEEDS_DOWNLOAD_ERROR LastDownloadError { 
            get { return FEEDS_DOWNLOAD_ERROR.FDE_NONE; }
        }            
        
        public long Length 
        { 
            get { return length; }
        }         
        
        public long LocalID
        {
            get { return -1; }
        }
        
        public string LocalPath 
        { 
            get { return String.Empty; } 
        }        
        
        public long ParentID
        {
            get { return -1; }
        }        
        
        public string Type 
        { 
            get { return type; }
        }         
        
        public string Url 
        { 
            get { return url; }
        }           

        public static bool TryCreateWrapper (XmlNode node, 
                                             out RssFeedEnclosureWrapper result)
        {
            result = null;            
            bool ret = false;
            
            try {
                result = new RssFeedEnclosureWrapper (node);
                ret = true;
            } catch {}
            
            return ret;
        }        

        public RssFeedEnclosureWrapper (XmlNode node)
        {
            if (node == null) {
                throw new ArgumentNullException ("node");
            }
                            
            url = XmlUtils.GetXmlNodeText (node, "enclosure/@url");                       
            
            if (url == String.Empty) {
                throw new FormatException (
                    "node: 'url' node must exist."
                );
            }

            length = XmlUtils.GetInt64 (node, "enclosure/@length");        
            type = XmlUtils.GetXmlNodeText (node, "enclosure/@type");
            
            if (String.IsNullOrEmpty (type)) {
                type = "application/octet-stream";
            }        
                
            if (length < 0) {
                length = 0;                    
            }                
        }
    }   
}  
