private void UpdateFromAtom(WebEntry entry, XElement element, Action <Exception> error)
{
entry.URI = GetLinkAtom(element);
entry.Title = (string)element.Element(Atom + "title"); // TODO the title might be HTML.
string updated = (string)GetMandatoryElement(element, Atom + "updated");
try {
entry.Date = Tools.RFC3339Date(updated);
}
catch (Exception e) {
error(new SubscriptionParsingException(string.Format("Invalid date string “{0}”", updated), e)
{
Subscription = this
});
}
XElement content = element.Element(Atom + "content");
if (content != null)
{
XAttribute src = content.Attribute("src");
if (src != null)
{
if (entry.Description == null)
{
entry.Description = "(awaiting remote content)";
// TODO fetch content from somewhere else on demand
}
}
else
{
// TODO content might not be HTML
entry.Description = (string)content;
}
}
else
{
XElement summary = element.Element(Atom + "summary");
if (summary != null)
{
entry.Description = (string)summary;
}
else
{
entry.Description = null;
}
}
}
private void UpdateFromRss(WebEntry entry, XElement item, Action <Exception> error)
{
XElement title = item.Element("title") ?? item.Element(RSS + "title");
XElement description = item.Element(RSSContent + "encoded")
?? item.Element("description")
?? item.Element(RSS + "description");
XElement pubDate = item.Element("pubDate");
XElement dcDate = item.Element(DcmiMetadata + "date");
entry.Title = (title != null ? (string)title : "");
entry.Description = description != null ? (string)description : "";
entry.URI = GetRssItemUri(item);
if (pubDate != null)
{
try {
entry.Date = Tools.RFC822Date((string)pubDate);
}
catch (Exception e) {
error(new SubscriptionParsingException(string.Format("Invalid date string “{0}”", (string)pubDate),
e)
{
Subscription = this
});
}
}
else if (dcDate != null)
{
try {
entry.Date = Tools.RFC3339Date((string)dcDate);
}
catch (Exception e) {
error(new SubscriptionParsingException(string.Format("Invalid date string “{0}”", (string)dcDate),
e)
{
Subscription = this
});
}
}
// TODO author, category, comments, enclosure, source
}
private void UpdateEntry(XElement item,
string id,
Action <WebEntry, XElement, Action <Exception> > update,
Action <Exception> error)
{
WebEntry entry = null;
bool newEntry = false;
// Find out what we know
entry = (WebEntry)_Entries.Entries.GetValueOrDefault(id, null);
if (entry == null)
{
// A new entry.
entry = new WebEntry()
{
Identity = id,
Serial = this.NextSerial++,
ParentSubscription = this,
ParentEntryList = _Entries,
};
newEntry = true;
}
// Update the item
try {
update(entry, item, error);
}
catch (SubscriptionParsingException spe) {
// If individual errors fail, we just log them and move on
spe.Subscription = this;
error(spe);
}
// If anything new was created, record it
if (newEntry)
{
Add(entry);
}
}
