private Topic ReadTopic(XmlReader reader, DirectoryPath root)
{
var file = reader.GetAttribute("file");
var url = reader.GetAttribute("importurl");
if (string.IsNullOrWhiteSpace(file) &&
string.IsNullOrWhiteSpace(url))
{
return(null);
}
var id = reader.GetAttribute("id");
var title = reader.GetAttribute("title");
var hidden = string.Equals("true", reader.GetAttribute("hidden"), StringComparison.OrdinalIgnoreCase);
if (string.IsNullOrWhiteSpace(id))
{
if (!string.IsNullOrWhiteSpace(url))
{
throw new InvalidOperationException("A remote document require a local ID.");
}
if (!string.IsNullOrWhiteSpace(file))
{
id = Path.GetFileNameWithoutExtension(file);
}
else if (!string.IsNullOrWhiteSpace(title))
{
id = title.ToSlug();
}
else
{
throw new InvalidOperationException("Could not generate ID from topic.");
}
}
var body = ReadBody(root, file, url) ?? string.Empty;
if (!string.IsNullOrWhiteSpace(body))
{
// Read the file and separate front matter from content.
var content = _contentParser.ParseString(body);
if (content != null)
{
body = _contentProcessor.PreProcess(content.Body);
body = _contentConverter.ConvertToHtml(content, body);
}
// Process the content.
body = _contentProcessor.PostProcess(body) ?? body;
}
return(new Topic(id, title, body, hidden, file, url));
}
