private SyndicationTextInput TryReadTextInputFromExtension(SyndicationElementExtensionCollection elementExtensions)
{
SyndicationElementExtension textInputElement = elementExtensions
.Where(e => e.OuterName == Rss20Constants.TextInputTag && e.OuterNamespace == Rss20Constants.Rss20Namespace)
.FirstOrDefault();
if (textInputElement == null)
{
return(null);
}
var textInput = new SyndicationTextInput();
using (XmlReader reader = textInputElement.GetReader())
{
reader.ReadStartElement();
while (reader.IsStartElement())
{
string name = reader.LocalName;
string value = reader.ReadElementString();
switch (name)
{
case Rss20Constants.DescriptionTag:
textInput.Description = value;
break;
case Rss20Constants.TitleTag:
textInput.Title = value;
break;
case Rss20Constants.LinkTag:
textInput.Link = new SyndicationLink(new Uri(value, UriKind.RelativeOrAbsolute));
break;
case Rss20Constants.NameTag:
textInput.Name = value;
break;
default:
break;
}
}
reader.ReadEndElement();
}
return(IsValidTextInput(textInput) ? textInput : null);
}
private SyndicationLink TryReadDocumentationFromExtension(SyndicationElementExtensionCollection elementExtensions)
{
SyndicationElementExtension documentationElement = elementExtensions
.Where(e => e.OuterName == Rss20Constants.DocumentationTag && e.OuterNamespace == Rss20Constants.Rss20Namespace)
.FirstOrDefault();
if (documentationElement == null)
{
return(null);
}
using (XmlReader reader = documentationElement.GetReader())
{
SyndicationLink documentation = Rss20FeedFormatter.ReadAlternateLink(reader, BaseUri, SyndicationFeedFormatter.DefaultUriParser, preserveAttributeExtensions: true);
return(documentation);
}
}
private void TryReadSkipHoursFromExtension(SyndicationElementExtensionCollection elementExtensions, Collection <int> skipHours)
{
SyndicationElementExtension skipHoursElement = elementExtensions
.Where(e => e.OuterName == Rss20Constants.SkipHoursTag && e.OuterNamespace == Rss20Constants.Rss20Namespace)
.FirstOrDefault();
if (skipHoursElement == null)
{
return;
}
using (XmlReader reader = skipHoursElement.GetReader())
{
reader.ReadStartElement();
while (reader.IsStartElement())
{
if (reader.LocalName == Rss20Constants.HourTag)
{
string value = reader.ReadElementString();
int hour;
bool parsed = int.TryParse(value, NumberStyles.Integer, NumberFormatInfo.InvariantInfo, out hour);
if (!parsed || (hour < 0 || hour > 23))
{
throw new FormatException(string.Format(SR.InvalidSkipHourValue, value));
}
skipHours.Add(hour);
}
else
{
reader.Skip();
}
}
}
}
private void TryReadSkipDaysFromExtension(SyndicationElementExtensionCollection elementExtensions, Collection <string> skipDays)
{
SyndicationElementExtension skipDaysElement = elementExtensions
.Where(e => e.OuterName == Rss20Constants.SkipDaysTag && e.OuterNamespace == Rss20Constants.Rss20Namespace)
.FirstOrDefault();
if (skipDaysElement == null)
{
return;
}
using (XmlReader reader = skipDaysElement.GetReader())
{
reader.ReadStartElement();
while (reader.IsStartElement())
{
if (reader.LocalName == Rss20Constants.DayTag)
{
string day = reader.ReadElementString();
//Check if the day is actually an accepted day.
if (IsValidDay(day))
{
skipDays.Add(day);
}
}
else
{
reader.Skip();
}
}
reader.ReadEndElement();
}
}