I’m just learning how to manage UI States. In the following example I’m using combine() for 2 of my use cases and they are collected when the app starts. But what if I want to collect a 3rd different use case when the user clicks a button, for example. How could I update the state in this case. Should I use a separate and different StateFlow? Thanks in advance!

val uiState: StateFlow<NewsUiState> =
        combine(
            getAllTopNewsUseCase(), 
            getNewsByKeywordUseCase(_keywordSearch.value)
        ) { latestNews, newsByKeyword ->
            when {
                latestNews.isNullOrEmpty() -> NewsUiState.Success(newsByKeyword = newsByKeyword)
                newsByKeyword.isNullOrEmpty() -> NewsUiState.Success(latestNews = latestNews)
                else -> NewsUiState.Success(latestNews, newsByKeyword)
            }

        }.catch {
            NewsUiState.Error(it)
        }.stateIn(
            scope = viewModelScope,
            started = SharingStarted.WhileSubscribed(5_000),
            initialValue = NewsUiState.Loading
        )

This is the sealed interface I defined to hold the state:

sealed interface NewsUiState {
    object Loading: NewsUiState
    data class Success(
        val latestNews: List<NewsItem>? = null,
        val newsByKeyword: List<NewsItem>? = null
    ): NewsUiState
    data class Error(val throwable: Throwable): NewsUiState

}

And, if it’s useful this is how I produce state from my Screen:

val lifecycle = LocalLifecycleOwner.current.lifecycle
    val uiState by produceState<NewsUiState>(
        initialValue = NewsUiState.Loading,
        key1 = lifecycle,
        key2 = newsViewModel,
    ) {
        lifecycle.repeatOnLifecycle(state = Lifecycle.State.STARTED) {
            newsViewModel.uiState.collect { value = it }
        }
    }

    when(uiState) {
        is NewsUiState.Error -> TODO()
        NewsUiState.Loading -> TODO()
        is NewsUiState.Success -> TODO()
    }