RocketsScreen.kt

@Composable
internal fun RocketsScreen(
    uiState: RocketsUiState,
    (...)
) {
    (...)
    
    if (uiState.rockets.isNotEmpty()) {
        RocketsAvailableContent(
            snackbarHostState = snackbarHostState,
            uiState = uiState,
            (...)
        )
    } else {
        RocketsNotAvailableContent(
            uiState = uiState
        )
    }
}

@Composable
private fun RocketsAvailableContent(
    snackbarHostState: SnackbarHostState,
    uiState: RocketsUiState,
    (...)
) {
    if (uiState.isError) {
        val errorMessage = stringResource(R.string.rockets_error_refreshing)

        LaunchedEffect(snackbarHostState) {
            snackbarHostState.showSnackbar(
                message = errorMessage
            )
        }
    }

    RocketsListContent(
        rocketList = uiState.rockets,
        (...)
    )
}

@Composable
private fun RocketsNotAvailableContent(uiState: RocketsUiState) {
    when {
        uiState.isLoading -> RocketsLoadingPlaceholder()
        uiState.isError -> RocketsErrorContent()
    }
}