IssueTracker

Ideally we would not pass any initial state because it will always have some case where it is wrong - we should ideally wait for a real event from Paging before sending it downstream to user.

For example the initial state:

CombinedLoadStates(
            refresh = InitialLoadStates.refresh,
            prepend = InitialLoadStates.prepend,
            append = InitialLoadStates.append,
            source = InitialLoadStates
        )

...will always have null mediator states, even if they are using RemoteMediator. This can mess up loadstate logic that is waiting for some combination of source + mediator loads to happen. It's easy to filter the initial case, but it gets complicated if they want to switchMap between multiple streams and they all start with this initial state. Or also consider the case when coming from cached state and needing to filter this out... it's bad developer UX.

So we could either set this to nullable to denote "no state" or we could have some constant we use that can be easily filtered out like "BogusLoadState" and then people can do .filter { it !== BogusLoadState }

Alternatively, if we can read whether we have RemoteMediator or not, we could try this for initial state which would be a lot more accurate:

private val InitialLoadStates = LoadStates(
    LoadState.Loading,
    IncompleteLoadState,
    IncompleteLoadState
)

CombinedLoadStates(
  refresh = InitialLoadStates.refresh,
  prepend = InitialLoadStates.prepend,
  append = InitialLoadStates.append,
  source = InitialLoadStates,
  mediatr = ??
)