public void Process(TimelineItemContainer timelineItemContainer)
{
foreach (var expander in _urlExpanders)
{
foreach (var uri in GetShortUrls(timelineItemContainer))
{
expander.IfCanExpand(
uri,
viewModel =>
{
var attachment = new UrlExpanderAttachment(viewModel);
timelineItemContainer.AddAttachment(attachment);
});
}
}
}
private static IEnumerable<Uri> GetShortUrls(TimelineItemContainer timelineItemContainer)
{
IEnumerable<string> urls = null;
if (timelineItemContainer.Metadata.Any(md => md.Key == "com.seesmic.timelineItem.UrlsDictionary"))
{
var urlsDictionaryMetadata = timelineItemContainer.Metadata.First(md => md.Key == "com.seesmic.timelineItem.UrlsDictionary");
var urlsDictionary = urlsDictionaryMetadata.Value as IDictionary<string, string>;
if (urlsDictionary != null)
{
urls = urlsDictionary.Keys;
}
}
if (urls == null)
{
urls = ShortUrlRegex.Matches(timelineItemContainer.TimelineItem.Text).Cast<Match>().Select(m =>
{
if (m.Value.StartsWith("(", StringComparison.Ordinal) && m.Value.EndsWith(")", StringComparison.Ordinal))
{
return m.Value.Substring(1, m.Value.Length - 2);
}
return m.Value;
});
}
// convert to URI, only return short URLs (no querystring, only slash is separating host and path)
return urls.Select(urlText =>
{
Uri url;
if (Uri.TryCreate(urlText, UriKind.Absolute, out url))
{
return url;
}
return null;
})
.Where(url => url != null && string.IsNullOrEmpty(url.Query) && url.LocalPath.LastIndexOf('/') < 1);
}
public void Remove(TimelineItemContainer timelineItemContainer)
{
}
public bool Filter(TimelineItemContainer timelineItemContainer)
{
return true;
}
public void Deliver(TimelineItemContainer timelineItemContainer)
{
}
