A shared ViewModel base for Compose Multiplatform

The multiplatform ViewModel gives you viewModelScope and onCleared on every target. A project base class on top of it is worth having for three things and no more: a container handle so a subclass can pull an occasional dependency without adding a constructor parameter, one loading/error surface so screens do not each invent theirs, and a logging tag derived from the concrete class.

// adapted — trimmed to the three members worth having, names generalized
abstract class BaseViewModel : ViewModel(), ContainerComponent {
    protected val handler: PlaybackHandler by inject()

    protected val tag: String = this::class.simpleName ?: "BaseViewModel"

    private val _showLoadingDialog = MutableStateFlow(false to "")
    val showLoadingDialog: StateFlow<Pair<Boolean, String>> get() = _showLoadingDialog