having this `UiState`: ```sealed interface MainScr...

# compose

[Pablo]

having this `UiState`:

sealed interface MainScreenUiState {
    object Loading : MainScreenUiState
    data class Error(val throwable: Throwable) : MainScreenUiState
    data class Success(val data: List<BusStop>) : MainScreenUiState
}

and this method of my `viewmodel`:

fun getBusStops() {
    viewModelScope.launch(Dispatchers.Main) {
        launch(<http://Dispatchers.IO|Dispatchers.IO>) {
            busDataRepository.updateBusStops() //updates local database with retrofit new data if available
        }
        val busStops = busDataRepository.getBusStops() //returns Flow<List<BusStop>>
        //TODO update uiState with new busStops
    }
}

how can I initialize my uistate variable with local data if exist (empty if not) and update it with new data when getBusStops() of the viewmodel gets called by ui?

val uiState: StateFlow<MainScreenUiState>

[Timo Drick]

I would say that this datamodel is a little bit off for your usecase.
Because it can only show loading or error and success. Maybe you should have a boolean for loading and than this sealed interface for the two possible states after loading. Or you just rename the Loading state to a data class that can hold the local data.