Item loading state

LoadingState.kt

class LoadingState(
    @get:VisibleForTesting val id: ItemId,
    private val defaultDispatcher: CoroutineDispatcher = Dispatchers.Default
) : CoroutineState<LceGesture, LceUiState>() {

    override fun doStart() {
        setUiState(LceUiState.Loading)
        load()
    }

    private fun load() {
        stateScope.launch(defaultDispatcher) {
            delay(1000L)
            withContext(Dispatchers.Main) {
                when (id) {
                    ItemId.LOADS_CONTENT -> toContent()
                    ItemId.FAILS_WITH_ERROR -> toError()
                }
            }
        }
    }

    private fun toContent() {
        setMachineState(ContentState("Some item data..."))
    }

    private fun toError() {
        setMachineState(ErrorState(id, IOException("Failed to load item")))
    }

    override fun doProcess(gesture: LceGesture) = when(gesture) {
        LceGesture.Back -> onBack()
        else -> Timber.d("Unhandled gesture: %s", gesture)
    }

    private fun onBack() {
        setMachineState(ItemListState())
    }
}