Hello ✋, I wanted to get your opinion on this small piece of code. I have a

LandingViewModel

exposing a

LandingViewState

data class LandingViewState(
    val firstPlayerName: String = "",
    val secondPlayerName: String = "",
    val canPlay: Boolean = false,
)

I would like the last attribute to be derived from name arguments while only exposing the

viewState

– you can see that as a reducer. I haven't been able to find a better pattern than this

@HiltViewModel
class LandingViewModel @Inject constructor() : ViewModel() {

    val viewState: LandingViewState by derivedStateOf {
        LandingViewState(
            firstPlayerName, secondPlayerName, firstPlayerName.isNotEmpty() && secondPlayerName.isNotEmpty()
        )
    }
    var firstPlayerName: String by mutableStateOf("")
    var secondPlayerName: String by mutableStateOf("")

}

So I've made the

viewState

as a derived state and exposed the other attributes. Ideally, I'd only expose the

viewState

as a state and transform the

canPlay

on the fly as I'd have done with a reducer. But I can't figure out how to do it with compose

mutableStateOf

Try not to expose any compose dependencies in the viewModel, apart from some(for instance, SnapShotList). Your model should be like

data class LandingViewState(

val firstPlayerName: String = "",

val secondPlayerName: String = ""

){

val canPlay: Boolean = xxx

}

Thanks for the insight! I didn't realize I was exposing compose dependencies in the VM via the derivedStateOf 🤦