private static FeedItem MakeFeedItem(XmlReader reader, DateTime defaultItemDate)
{
string description = null;
string id = null;
string parentId = null;
string link = null;
string title = null;
string subject = null;
string author = null;
Enclosure enclosure = null;
bool dirtyFlag = false;
//int commentCount = NewsItem.NoComments;
int commentCount = 0;
DateTime date = defaultItemDate;
DateTime now = date;
Hashtable optionalElements = new Hashtable();
//Flagged flagged = Flagged.None;
ArrayList subjects = new ArrayList();
string itemNamespaceUri = reader.NamespaceURI; //the namespace URI of the RSS item
bool nodeRead = false; //indicates whether the last node was read using XmlDocument.ReadNode()
while ((nodeRead || reader.Read()) && reader.NodeType != XmlNodeType.EndElement)
{
nodeRead = false;
object localname = reader.LocalName;
object namespaceuri = reader.NamespaceURI;
if (reader.NodeType != XmlNodeType.Element)
{
continue;
}
/* string nodeNamespaceUri = reader.NamespaceURI;
* if (StringHelper.EmptyOrNull(nodeNamespaceUri))
* nodeNamespaceUri = itemNamespaceUri; */
// if in node has no namespace, assume in RSS namespace
// save some string comparisons
bool nodeNamespaceUriEqual2Item = reader.NamespaceURI.Equals(itemNamespaceUri);
bool nodeNamespaceUriEqual2DC = (namespaceuri == nameRefs[(int)NameTableIndexes.ns_dc]);
if ((description == null) || (localname == nameRefs[(int)NameTableIndexes.body]) || (localname == nameRefs[(int)NameTableIndexes.encoded]))
{ //prefer to replace rss:description/dc:description with content:encoded
if ((namespaceuri == nameRefs[(int)NameTableIndexes.ns_xhtml]) &&
(localname == nameRefs[(int)NameTableIndexes.body]))
{
if (!reader.IsEmptyElement)
{
XmlElement elem = (XmlElement)optionalElementsDoc.ReadNode(reader);
nodeRead = true;
description = elem.InnerXml;
elem = null;
}
continue;
}
else if ((namespaceuri == nameRefs[(int)NameTableIndexes.ns_content]) &&
(localname == nameRefs[(int)NameTableIndexes.encoded]))
{
if (!reader.IsEmptyElement)
{
description = ReadElementString(reader);
}
continue;
}
else if ((nodeNamespaceUriEqual2Item || nodeNamespaceUriEqual2DC) &&
(localname == nameRefs[(int)NameTableIndexes.description]))
{
if (!reader.IsEmptyElement)
{
description = ReadElementString(reader);
}
continue;
}
}
if (localname == nameRefs[(int)NameTableIndexes.enclosure])
{
enclosure = new Enclosure();
enclosure.Url = FeedParser.ReadAttribute(reader, "url");
enclosure.Type = FeedParser.ReadAttribute(reader, "type");
enclosure.Length = Convert.ToInt32(FeedParser.ReadAttribute(reader, "length"));
}
if (link != null && link.Trim().Length == 0)
{
link = null; // reset on empty elements
}
if ((link == null) || (localname == nameRefs[(int)NameTableIndexes.guid]))
{ //favor rss:guid over rss:link
if (nodeNamespaceUriEqual2Item &&
(localname == nameRefs[(int)NameTableIndexes.guid]))
{
if ((reader["isPermaLink"] == null) ||
(StringHelper.AreEqualCaseInsensitive(reader["isPermaLink"], "true")))
{
if (!reader.IsEmptyElement)
{
link = ReadElementString(reader);
}
}
else if (StringHelper.AreEqualCaseInsensitive(reader["isPermaLink"], "false"))
{
if (!reader.IsEmptyElement)
{
id = ReadElementString(reader);
}
}
continue;
}
else if (nodeNamespaceUriEqual2Item &&
(localname == nameRefs[(int)NameTableIndexes.link]))
{
if (!reader.IsEmptyElement)
{
link = ReadElementString(reader);
}
continue;
}
}
if (title == null)
{
if (nodeNamespaceUriEqual2Item &&
(localname == nameRefs[(int)NameTableIndexes.title]))
{
if (!reader.IsEmptyElement)
{
title = ReadElementString(reader);
}
continue;
}
}
if (localname == nameRefs[(int)NameTableIndexes.dirtyFlag])
{
if (!reader.IsEmptyElement)
{
dirtyFlag = Boolean.Parse(ReadElementString(reader));
}
continue;
}
if ((author == null) || (localname == nameRefs[(int)NameTableIndexes.creator]))
{ //prefer dc:creator to <author>
if (nodeNamespaceUriEqual2DC &&
(localname == nameRefs[(int)NameTableIndexes.creator] ||
localname == nameRefs[(int)NameTableIndexes.author]))
{
if (!reader.IsEmptyElement)
{
author = ReadElementString(reader);
}
continue;
}
else if (nodeNamespaceUriEqual2Item && (localname == nameRefs[(int)NameTableIndexes.author]))
{
if (!reader.IsEmptyElement)
{
author = ReadElementString(reader);
}
continue;
}
}
if ((parentId == null) && (localname == nameRefs[(int)NameTableIndexes.reference]))
{
if (namespaceuri == nameRefs[(int)NameTableIndexes.ns_annotate])
{
parentId = reader.GetAttribute("resource", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
}
continue;
}
if (nodeNamespaceUriEqual2DC && (localname == nameRefs[(int)NameTableIndexes.subject]))
{
if (!reader.IsEmptyElement)
{
subjects.Add(ReadElementString(reader));
}
continue;
}
else if (nodeNamespaceUriEqual2Item && (localname == nameRefs[(int)NameTableIndexes.category]))
{
if (!reader.IsEmptyElement)
{
subjects.Add(ReadElementString(reader));
}
continue;
}
if (commentCount == 0)
{
if ((localname == nameRefs[(int)NameTableIndexes.comments]) &&
(namespaceuri == nameRefs[(int)NameTableIndexes.ns_slash]))
{
try
{
if (!reader.IsEmptyElement)
{
commentCount = Int32.Parse(ReadElementString(reader));
}
}
catch (Exception) { /* DO NOTHING */ }
continue;
}
}
if (date == now)
{
try
{
if (nodeNamespaceUriEqual2Item &&
(localname == nameRefs[(int)NameTableIndexes.pubdate]))
{
if (!reader.IsEmptyElement)
{
date = DateTimeExt.Parse(ReadElementString(reader));
}
continue;
}
else if (nodeNamespaceUriEqual2DC && (localname == nameRefs[(int)NameTableIndexes.date]))
{
if (!reader.IsEmptyElement)
{
date = DateTimeExt.ToDateTime(ReadElementString(reader));
}
continue;
}
}
catch (FormatException fe)
{
System.Diagnostics.Debug.WriteLine(fe.ToString());
/* date was improperly formated*/
//_log.Warn("Error parsing date from item {" + subject +
// "} from feed {" + link + "}: " + fe.Message);
continue;
}
}
XmlQualifiedName qname = new XmlQualifiedName(reader.LocalName, reader.NamespaceURI);
XmlNode optionalNode = optionalElementsDoc.ReadNode(reader);
nodeRead = true;
/* some elements occur multiple times in feeds, only the 1st is picked */
if (!optionalElements.Contains(qname))
{
optionalElements.Add(qname, optionalNode);
}
} //while
//HACK: Sometimes we get garbled items due to network issues, this ensures we don't send them to the UI
if (link == null && id == null && title == null && date == now)
{
return(null);
}
/* create Subject if any */
for (int i = 0; i < subjects.Count; i++)
{
subject += (i > 0 ? " | " + subjects[i] : subjects[i]);
}
/* set value of id to link if no guid in XML stream */
id = (id == null ? link : id);
FeedItem newsItem = new FeedItem(); //f, title, link, description, date, subject, ctype, optionalElements, id, parentId);
newsItem.Title = title;
newsItem.Id = id;
newsItem.Link = link;
newsItem.Description = description;
newsItem.PubDate = date;
newsItem.Enclosure = enclosure;
newsItem.OptionalElements = optionalElements;
newsItem.CommentCount = commentCount;
newsItem.Author = author;
newsItem.DirtyFlag = dirtyFlag;
return(newsItem);
}
/// <summary>
/// Initializes a new instance of the FeedSerializer.
/// </summary>
public FeedSerializer()
{
parser = new FeedParser();
}
