LoadStateFlowCollection.kt

lifecycleScope.launch {
    repoAdapter.loadStateFlow.collect { loadState ->
        // Show a retry header if there was an error refreshing, and items were previously
        // cached OR default to the default prepend state
        header.loadState = loadState.mediator
            ?.refresh
            ?.takeIf { it is LoadState.Error && repoAdapter.itemCount > 0 }
            ?: loadState.prepend

        val isListEmpty = loadState.refresh is LoadState.NotLoading && repoAdapter.itemCount == 0
        // show empty list
        emptyList.isVisible = isListEmpty
        // Only show the list if refresh succeeds, either from the the local db or the remote.
        list.isVisible =  loadState.source.refresh is LoadState.NotLoading || loadState.mediator?.refresh is LoadState.NotLoading
        // Show loading spinner during initial load or refresh.
        progressBar.isVisible = loadState.mediator?.refresh is LoadState.Loading
        // Show the retry state if initial load or refresh fails.
        retryButton.isVisible = loadState.mediator?.refresh is LoadState.Error && repoAdapter.itemCount == 0
    }
}