MVI Skeleton

FancyMVI.kt

class FancyViewModel {

    val viewState: MutableStateFlow<ViewState> = MutableStateFlow(ViewState())
    val viewEffect: MutableSharedFlow<ViewState> = MutableSharedFlow()

    fun executeAction(action: Action) {
        //handle action
    }
}

sealed class Action {
    object ShowDialogClicked : Action()
    object GoToSuperScreenClicked : Action()
}

data class ViewState(
    val labelText: String = ""
    val otherLabel: String = ""
)

sealed class ViewEffect {
    object ShowFancyDialog : ViewEffect()
    object NavigateToSuperScreen : ViewEffect()
}

class FancyFragment {

    val viewModel = FancyViewModel()
    var currentState: ViewState? = null

    fun onViewCreated() {
        GlobalScope.launch {
            viewModel.viewState.collect {
                handleState(it)
            }

            viewModel.viewEffect.collect {
                //handle view effect
            }
        }
    }

    private fun handleState(newState: ViewState) {
        if (currentState?.labelText != newState.labelText) {
            //draw label
        }
        if (currentState?.otherLabel != newState.otherLabel) {
            //draw otherLabel
        }

        currentState = newState
    }
}