public Task <BatchInfo> TryGetNextBatch()
{
if (Batches.All(x => x.State == BatchState.Completed))
{
return(Task.FromResult <BatchInfo>(null));
}
var stagedBatch = Batches.SingleOrDefault(x => x.State == BatchState.Staged);
if (stagedBatch != null)
{
return(Task.FromResult <BatchInfo>(stagedBatch));
}
var pendingBatch = Batches.First(x => x.State == BatchState.Pending);
return(Task.FromResult <BatchInfo>(pendingBatch));
}