Hi Folks, I need some help related to *`SKIE`*. ...

# touchlab-tools

[Ashu Tyagi]

Hi Folks,

I need some help related to SKIE.

So I have an abstract class which looks something like this

abstract class BaseViewModel<Event : UiEvent, State : UiState, Effect : UiEffect> : ViewModel() {

 abstract suspend fun handleEvent(event: Event)


    suspend fun setEvent(event: Event) {
        val newEvent = event
        _event.emit(newEvent)
    }

    protected suspend fun setState(reduce: State.() -> State) {
        val newState = currentState.reduce()
        _uiState.emit(newState)
    }

    protected suspend fun setEffect(builder: () -> Effect) {
        val effectValue = builder()
        _effect.emit(effectValue)
    }
}

Then I have a ViewModel which extends this BaseViewModel, something like this:

class HomePageViewModel(
    private val fetchFeaturedPlaylistsUseCase: FetchFeaturedPlaylistsUseCase,
    private val fetchFeaturedAlbumsUseCase: FetchFeaturedAlbumsUseCase
) : BaseViewModel<HomePageContract.Event, HomePageContract.State, HomePageContract.Effect>() {

    suspend fun init() {
        subscribeEvents()
    }

    private suspend fun fetchHomePageData() {
        
    }

    override suspend fun handleEvent(event: HomePageContract.Event) {
        when (event) {
            HomePageContract.Event.OnFetchHomePageEvent -> {
                fetchHomePageData()
            }
        }
    }

    override fun onCleared() {
        super.onCleared()
    }
}

Now I have to call setEffect which is a suspend function. SKIE converts them to Swift async functions. But I'm not able to access setEffect (which comes from base class) on HomePageViewModel but I'm able to call init() which is also a suspend function but is defined in HomePageViewModel instead of BaseViewModel.

Also, I can see an async function for init() but not for setEffect or other suspend function from abstract class (screenshots attached below).

Sorry for the long post. Thanks in advance.

[Ashu Tyagi]

Screenshot 2024-01-13 at 2.32.06 AM.png,Screenshot 2024-01-13 at 2.32.20 AM.png

[Filip Dolník]

Hi! I think the problem is likely that suspend functions of generic classes have to be called using a different syntax: https://skie.touchlab.co/features/suspend#generic-classes

[Ashu Tyagi]

Thanks a lot @Filip Dolník.

This is what I was missing. Working now as expected.