public ActivityStream Load(byte[] streamId)
{
var result = store.Get(streamId);
if (ReferenceEquals(null, result))
{
result = new ActivityStream(streamId);
}
return(result);
}
public Dictionary <byte[], long> StreamsToLoad(ActivityStream stream, long timestamp = 0)
{
AddOrUpdateStreamsToLoadWith(streamsToLoad, stream, timestamp);
Stack <byte[]> streamsToCrawl = new Stack <byte[]>();
streamsToCrawl.Push(stream.StreamId);
while (streamsToCrawl.Count > 0)
{
Guard_AgainstStupidity();
// Load next stream.
var currentId = streamsToCrawl.Pop();
var current = streamStore.Get(currentId) ?? ActivityStream.Empty;
long currentExpiresAt = current.ExpiresAt;
streamsToLoad.TryGetValue(current.StreamId, out currentExpiresAt);
if (ActivityStream.IsEmpty(current))
{
continue;
}
// Crawl only first level attached streams.
foreach (var nested in current.AttachedStreams)
{
if (IsCrawled(nested))
{
continue;
}
streamsToCrawl.Push(nested.StreamId);
var nestedShouldExpireAt = currentExpiresAt < nested.ExpiresAt ? currentExpiresAt : nested.ExpiresAt;
AddOrUpdateStreamsToLoadWith(streamsToLoad, nested, nestedShouldExpireAt);
}
}
return(streamsToLoad);
}