public IEnumerable <IDocument> Execute(IReadOnlyList <IDocument> inputs, IExecutionContext context)
{
XDocument rss = new XDocument(new XDeclaration("1.0", "UTF-8", null));
FilePath rssPath = new DirectoryPath(_siteUri.ToString()).CombineFile(_rssPath);
XElement rssRoot = new XElement("rss",
new XAttribute("version", "2.0"),
new XAttribute(XNamespace.Xmlns + "atom", AtomNamespace)
);
XElement channel = new XElement("channel",
new XElement("title", _feedTitle),
new XElement("description", _feedDescription),
new XElement("link", _siteUri.ToString()),
new XElement(AtomNamespace + "link",
new XAttribute("href", rssPath.FullPath),
new XAttribute("rel", "self")
),
new XElement("lastBuildDate", DateTimeHelper.ToRssDate(DateTime.Now))
);
if (_language != null)
{
channel.Add(new XElement("language", _language));
}
foreach (IDocument input in inputs)
{
XElement item = new XElement("item");
object title;
bool hasTitle = input.TryGetValue(_titleMetaKey, out title);
item.Add(new XElement("title", hasTitle ? title : "Untitled"));
// Get the item link
FilePath link = input.FilePath(Keys.RssItemUrl)
?? input.FilePath(Keys.RelativeFilePath);
if (link != null)
{
if (link.IsAbsolute)
{
link = new DirectoryPath("/").GetRelativePath(link);
}
if (_linkCustomizerDelegate != null)
{
link = _linkCustomizerDelegate(link);
// Check for absolute one more time in case the customizer returned an absolute path
if (link.IsAbsolute)
{
link = new DirectoryPath("/").GetRelativePath(link);
}
}
}
if (link == null)
{
throw new Exception($"Required metadata keys {Keys.RssItemUrl} or {Keys.RelativeFilePath} were not found in the document {input.SourceString()}");
}
FilePath itemLink = new DirectoryPath(_siteUri.ToString()).CombineFile(link);
item.Add(new XElement("link", itemLink.FullPath));
object description = null;
bool hasDescription = input.TryGetValue(_descriptionMetaKey, out description);
item.Add(new XElement("description", hasDescription ? description : "No description"));
object pubDate = null;
if (input.TryGetValue(_pubDateMetaKey, out pubDate))
{
item.Add(new XElement("pubDate", DateTimeHelper.ToRssDate(DateTime.Parse((string)pubDate))));
}
if (_appendGuid)
{
object guid;
bool hasGuid = input.TryGetValue(_guidMetaKey, out guid);
if (hasGuid)
{
item.Add(new XElement("guid", guid, new XAttribute("isPermaLink", false)));
}
else
{
if (_assumePermalinks)
{
item.Add(new XElement("guid", link));
}
else if (input.Source == null)
{
Trace.Warning($"Cannot generate RSS item guid for document {input.SourceString()} because document source is not valid");
}
else
{
item.Add(new XElement("guid", GuidHelper.ToGuid(input.Source.FullPath).ToString(), new XAttribute("isPermaLink", false)));
}
}
}
channel.Add(item);
}
rss.Add(rssRoot);
rssRoot.Add(channel);
// rss.ToString() doesn't return XML declaration
StringBuilder outText = new StringBuilder();
using (UTF8StringWriter stream = new UTF8StringWriter(outText))
{
rss.Save(stream);
}
return(new IDocument[] { context.GetDocument(outText.ToString(), new KeyValuePair <string, object>[] {
new KeyValuePair <string, object>(Keys.IsRssFeed, true),
new KeyValuePair <string, object>(Keys.RelativeFilePath, _rssPath),
new KeyValuePair <string, object>(Keys.WritePath, _rssPath)
}) });
}
