Using EventEmitter to move Navigation commands into ViewModels

NavigationCommand.kt

typealias NavigationCommand = (NavController, Context) -> Unit

RegistrationViewModel.kt

class RegistrationViewModel @AssistedInject constructor(
    private val authenticationManager: AuthenticationManager,
    @Assisted private val savedStateHandle: SavedStateHandle
) : ViewModel() {
    @AssistedInject.Factory
    interface Factory {
        fun create(savedStateHandle: SavedStateHandle): RegistrationViewModel
    }

    private val navigationEmitter: EventEmitter<NavigationCommand> = EventEmitter()
    val navigationCommands: EventSource<NavigationCommand> get() = navigationEmitter
    
    fun onEnterProfileNextClicked() {
        if (fullName.value!!.isNotBlank() && bio.value!!.isNotBlank()) {
            currentState.value = RegistrationState.COLLECT_USER_PASSWORD
            navigationEmitter.emit { navController, context ->
                navController.navigate(R.id.enter_profile_data_to_create_login_credentials)
            }
        }
    }