private async Task<IEnumerable<IEvent>> Insert(IStream stream, int version, IEnumerable<IEvent> events, bool doInsert)
{
var store = GetStore(stream);
var origVersion = version;
var currentBranch = _manager.ActiveBranch;
var liveStream = await _streamLocator.FindBranched(stream, currentBranch);
IList<IEvent> laterEvents = new List<IEvent>();
if (liveStream != null)
laterEvents = await store.ReadStream<IEvent>(liveStream, version).ToList();
else
stream = stream.Branch(currentBranch, ExpectedVersion.EmptyStream);
if (laterEvents.Count == 0)
{
if (doInsert)
return await Append(stream, version, events);
if (stream.Version != version - 1)
throw new InvalidOperationException("Stream version is inconsistent");
return new List<IEvent>();
}
var enumerable = events.ToList();
Time time;
if (version > 0)
time = (await store.ReadStream<IEvent>(stream, version - 1, 1).SingleAsync()).Timestamp;
else
time = enumerable.First().Timestamp;
var tempStreamId = $"{stream.Timeline}-{stream.Id}-{version}";
var branch = await _manager.Branch(tempStreamId, time);
var newStream = await _streamLocator.FindBranched(stream, branch.Id);
if (newStream == null)
throw new InvalidOperationException($"Stream {tempStreamId}:{stream.Type}:{stream.Id} not found!");
var invalidEvents = (await Append(newStream, version, enumerable.Concat(laterEvents))).ToList();
await _manager.Branch(currentBranch);
if (doInsert && !invalidEvents.Any())
{
await TrimStream(liveStream, origVersion - 1);
await _manager.Merge(tempStreamId);
}
await _manager.DeleteBranch(tempStreamId);
return invalidEvents;
}
/// <inheritdoc />
public async Task DeleteStream(IStream stream)
{
await DeleteStreamStore(stream);
_streams.OnNext(stream.Branch(stream.Timeline, ExpectedVersion.NoStream));
}