private static long CalculateActualStreamLength(Option<Commit> lastCommitInStream)
{
return lastCommitInStream
.Map(commit => commit.EventIndexInStreamStartsFrom + commit.EventIds.Count())
.ValueOr(0);
}
private static Commit CreateCommit(
Guid streamId,
Option<Commit> lastCommitInStream,
Option<Commit> lastCommitAllStreams,
IEnumerable<EventContainer> identifiedEvents)
{
var indexInStream = lastCommitInStream
.Map(commit => commit.IndexInStream + 1)
.ValueOr(0);
var indexInAllStreams = lastCommitAllStreams
.Map(commit => commit.IndexInAllStreams + 1)
.ValueOr(0);
var eventsIds = identifiedEvents.Select(identifiedEvent => identifiedEvent.Id);
var eventIndexInStream = lastCommitInStream
.Map(commit => commit.EventIndexInStreamStartsFrom + commit.EventIds.Count())
.ValueOr(0);
var eventIndexInAllStreams = lastCommitAllStreams
.Map(commit => commit.EventIndexInAllStreamsStartsFrom + commit.EventIds.Count())
.ValueOr(0);
return new Commit(
streamId: streamId,
indexInStream: indexInStream,
indexInAllStreams: indexInAllStreams,
eventIndexInStreamStartsFrom: eventIndexInStream,
eventIndexInAllStreamsStartsFrom: eventIndexInAllStreams,
eventIds: eventsIds);
}