public static FeedElement ToStreamEventBackwardFeed(ClientMessage.ReadStreamEventsBackwardCompleted msg, Uri requestedUrl, EmbedLevel embedContent, bool headOfStream)
{
Ensure.NotNull(msg, "msg");
string escapedStreamId = Uri.EscapeDataString(msg.EventStreamId);
var self = HostName.Combine(requestedUrl, "/streams/{0}", escapedStreamId);
var feed = new FeedElement();
feed.SetTitle(string.Format("Event stream '{0}'", msg.EventStreamId));
feed.StreamId = msg.EventStreamId;
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 ? msg.Events[0].Event.TimeStamp : DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.SetHeadOfStream(headOfStream); //TODO AN: remove this ?
feed.SetSelfUrl(self);
var prevEventNumber = Math.Min(msg.FromEventNumber, msg.LastEventNumber) + 1;
var nextEventNumber = msg.FromEventNumber - msg.MaxCount;
feed.AddLink("self", self);
feed.AddLink("first", HostName.Combine(requestedUrl, "/streams/{0}/head/backward/{1}", escapedStreamId, msg.MaxCount));
if (!msg.IsEndOfStream)
{
if (nextEventNumber < 0) throw new Exception(string.Format("nextEventNumber is negative: {0} while IsEndOfStream", nextEventNumber));
feed.AddLink("last", HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", escapedStreamId, 0, msg.MaxCount));
feed.AddLink("next", HostName.Combine(requestedUrl, "/streams/{0}/{1}/backward/{2}", escapedStreamId, nextEventNumber, msg.MaxCount));
}
feed.AddLink("previous", HostName.Combine(requestedUrl, "/streams/{0}/{1}/forward/{2}", escapedStreamId, prevEventNumber, msg.MaxCount));
feed.AddLink("metadata", HostName.Combine(requestedUrl, "/streams/{0}/metadata", escapedStreamId));
for (int i = 0; i < msg.Events.Length; ++i)
{
feed.AddEntry(ToEntry(msg.Events[i], requestedUrl, embedContent));
}
return feed;
}
public static FeedElement ToReadStreamFeed(
ClientMessage.ReadStreamEventsBackwardCompleted msg, string userHostName, EmbedLevel embedContent,
bool headOfStream)
{
Ensure.NotNull(msg, "msg");
string escapedStreamId = Uri.EscapeDataString(msg.EventStreamId);
var self = HostName.Combine(userHostName, "/streams/{0}", escapedStreamId);
var feed = new FeedElement();
feed.SetTitle(string.Format("Event stream '{0}'", msg.EventStreamId));
feed.SetId(self);
feed.SetUpdated(msg.Events.Length > 0 ? msg.Events[0].Event.TimeStamp : DateTime.MinValue.ToUniversalTime());
feed.SetAuthor(AtomSpecs.Author);
feed.SetHeadOfStream(headOfStream);
if (headOfStream)
//NOTE: etag workaround - to be fixed with better http handling model
feed.SetETag(msg.LastEventNumber.ToString(CultureInfo.InvariantCulture) + ";" + "application/json".GetHashCode());
feed.SetSelfUrl(self);
feed.AddLink("self", self);
feed.AddLink("first", HostName.Combine(userHostName, "/streams/{0}", escapedStreamId)); // TODO AN: should account for msg.MaxCount
feed.AddLink("last", HostName.Combine(userHostName, "/streams/{0}/range/{1}/{2}", escapedStreamId, msg.MaxCount - 1, msg.MaxCount));
feed.AddLink("previous", HostName.Combine(userHostName,
"/streams/{0}/range/{1}/{2}",
escapedStreamId,
Math.Min(msg.FromEventNumber, msg.LastEventNumber) + msg.MaxCount,
msg.MaxCount));
if (msg.FromEventNumber - msg.MaxCount >= 0)
{
feed.AddLink("next", HostName.Combine(userHostName,
"/streams/{0}/range/{1}/{2}",
escapedStreamId,
msg.FromEventNumber - msg.MaxCount,
msg.MaxCount));
}
for (int i = 0; i < msg.Events.Length; ++i)
{
feed.AddEntry(ToEntry(msg.Events[i], userHostName, embedContent));
}
return feed;
}