protected static SyndicationCategory CreateCategory(InlineCategoriesDocument inlineCategories)
{
if (inlineCategories == null)
{
throw new ArgumentNullException(nameof(inlineCategories));
}
return(inlineCategories.CreateCategory());
}
internal static async Task <CategoriesDocument> ReadCategories(XmlReaderWrapper reader, Uri baseUri, CreateInlineCategoriesDelegate inlineCategoriesFactory, CreateReferencedCategoriesDelegate referencedCategoriesFactory, string version, bool preserveElementExtensions, bool preserveAttributeExtensions, int maxExtensionSize)
{
string link = reader.GetAttribute(App10Constants.Href, string.Empty);
if (string.IsNullOrEmpty(link))
{
InlineCategoriesDocument inlineCategories = inlineCategoriesFactory();
await ReadInlineCategoriesAsync(reader, inlineCategories, baseUri, version, preserveElementExtensions, preserveAttributeExtensions, maxExtensionSize);
return(inlineCategories);
}
else
{
ReferencedCategoriesDocument referencedCategories = referencedCategoriesFactory();
await ReadReferencedCategoriesAsync(reader, referencedCategories, baseUri, new Uri(link, UriKind.RelativeOrAbsolute), version, preserveElementExtensions, preserveAttributeExtensions, maxExtensionSize);
return(referencedCategories);
}
}
private static async Task WriteInlineCategoriesContentAsync(XmlWriter writer, InlineCategoriesDocument categories, string version)
{
writer = XmlWriterWrapper.CreateFromWriter(writer);
if (!string.IsNullOrEmpty(categories.Scheme))
{
await writer.WriteAttributeStringAsync(Atom10Constants.SchemeTag, categories.Scheme);
}
// by default, categories are not fixed
if (categories.IsFixed)
{
await writer.WriteAttributeStringAsync(App10Constants.Fixed, "yes");
}
await WriteAttributeExtensionsAsync(writer, categories, version);
for (int i = 0; i < categories.Categories.Count; ++i)
{
await Atom10FeedFormatter.WriteCategoryAsync(writer, categories.Categories[i], version);
}
await WriteElementExtensionsAsync(writer, categories, version);
}
private static async Task ReadInlineCategoriesAsync(XmlReaderWrapper reader, InlineCategoriesDocument inlineCategories, Uri baseUri, string version, bool preserveElementExtensions, bool preserveAttributeExtensions, int _maxExtensionSize)
{
inlineCategories.BaseUri = baseUri;
if (reader.HasAttributes)
{
while (reader.MoveToNextAttribute())
{
if (reader.LocalName == "base" && reader.NamespaceURI == Atom10FeedFormatter.XmlNs)
{
inlineCategories.BaseUri = FeedUtils.CombineXmlBase(inlineCategories.BaseUri, await reader.GetValueAsync());
}
else if (reader.LocalName == "lang" && reader.NamespaceURI == Atom10FeedFormatter.XmlNs)
{
inlineCategories.Language = await reader.GetValueAsync();
}
else if (reader.LocalName == App10Constants.Fixed && reader.NamespaceURI == string.Empty)
{
inlineCategories.IsFixed = (reader.Value == "yes");
}
else if (reader.LocalName == Atom10Constants.SchemeTag && reader.NamespaceURI == string.Empty)
{
inlineCategories.Scheme = await reader.GetValueAsync();
}
else
{
string ns = reader.NamespaceURI;
string name = reader.LocalName;
if (FeedUtils.IsXmlns(name, ns) || FeedUtils.IsXmlSchemaType(name, ns))
{
continue;
}
string val = await reader.GetValueAsync();
if (!TryParseAttribute(name, ns, val, inlineCategories, version))
{
if (preserveAttributeExtensions)
{
inlineCategories.AttributeExtensions.Add(new XmlQualifiedName(reader.LocalName, reader.NamespaceURI), await reader.GetValueAsync());
}
}
}
}
}
await SyndicationFeedFormatter.MoveToStartElementAsync(reader);
bool isEmptyElement = reader.IsEmptyElement;
await reader.ReadStartElementAsync();
if (!isEmptyElement)
{
XmlBuffer buffer = null;
XmlDictionaryWriter extWriter = null;
try
{
while (await reader.IsStartElementAsync())
{
if (await reader.IsStartElementAsync(Atom10Constants.CategoryTag, Atom10Constants.Atom10Namespace))
{
SyndicationCategory category = CreateCategory(inlineCategories);
await Atom10FeedFormatter.ReadCategoryAsync(reader, category, version, preserveAttributeExtensions, preserveElementExtensions, _maxExtensionSize);
if (category.Scheme == null)
{
category.Scheme = inlineCategories.Scheme;
}
inlineCategories.Categories.Add(category);
}
else if (!TryParseElement(reader, inlineCategories, version))
{
if (preserveElementExtensions)
{
var tuple = await SyndicationFeedFormatter.CreateBufferIfRequiredAndWriteNodeAsync(buffer, extWriter, reader, _maxExtensionSize);
buffer = tuple.Item1;
extWriter = tuple.Item2;
}
else
{
await reader.SkipAsync();
}
}
}
LoadElementExtensions(buffer, extWriter, inlineCategories);
}
finally
{
if (extWriter != null)
{
extWriter.Close();
}
}
await reader.ReadEndElementAsync();
}
}