Force refresh implementation

fragment_todo_list.xml

<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    android:id="@+id/swipe_refresh"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/todo_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
        tools:listitem="@layout/list_item_todo" />
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

TodoListFragment.kt

@AndroidEntryPoint
class TodoListFragment : StackFragment() {
  
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        bindings = FragmentTodoListBinding.inflate(inflater, container, false)
        bindings.viewModel = viewModel
        bindings.lifecycleOwner = viewLifecycleOwner
        bindings.todoList.adapter = adapter
        // Attach refresh listener
        with(bindings.swipeRefresh) {
            setOnRefreshListener(viewModel)
        }
        return bindings.root
    }

    private fun observeViewModel() {
        viewModel.todos.observe(viewLifecycleOwner) {
            adapter.submitList(it)
        }
        // Enable loading spinner
        viewModel.refreshing.observe(viewLifecycleOwner) {
            bindings.swipeRefresh.isRefreshing = it
        }
    }
}

TodoListViewModel.kt

@HiltViewModel
class TodoListViewModel(
    private val getAllTodosUseCase: GetAllTodosUseCase
) : ViewModel(), SwipeRefreshLayout.OnRefreshListener {
  private val _todos = MutableLiveData<List<Todo>>()
    val todos: LiveData<List<Todo>>
        get() = _todos

    private val _refreshing = MutableLiveData<Boolean>(false)
    val refreshing: LiveData<Boolean>
        get() = _refreshing

    // initial fetch triggered onViewCreated
    fun onViewCreated() {
        refresh()
    }
    
    // pull to refresh provided by SwipeRefreshLayout.OnRefreshListener
    override fun onRefresh() {
        refresh(true) 
    }
    
    private fun refresh(force: Boolean = false) {
        viewModelScope.launch {
            getAllTodosUseCase(force)
                .onStart { _refreshing.value = true }
                .onCompletion { _refreshing.value = false }
                .collect { response ->
                    when (response) {
                        is Result.Success -> _todos.value = response.result
                        else -> Unit //TODO handle error
                    }
                }
        }
    }
}