WorkoutDetailsFragment.kt

import com.sun.tools.javac.resources.CompilerProperties
import javax.swing.text.View

data class WorkoutDetailsState(
    val workout: Async<Workout> = Uninitialized,
) : MavericksState {

}
class WorkoutDetailsViewModel @Inject constructor(
    @Assisted initialState: WorkoutState,
    args: WorkoutDetailsArgs,
    workoutRepository: WorkoutRepository,
) : TonalViewModel<WorkoutDetailsState>(initialState) {

    init {
        workoutRepository.getWorkout(args.workoutId)
            .onEach { setState { copy(workout = it) } }
            .launchIn(viewModelScope)
    }
}

class WorkoutDetailsFragment : TonalFragment(R.layout.workout_details_fragment) {
    private val binding: WorkoutDetailsBinding by viewBinding()
    private val viewModel: WorkoutDetailsViewModel by fragmentViewModel()

    override fun invalidate() = withState(viewModel) { state ->
        binding.title.text = state.workout()?.title
        binding.progressBar.isVisible = state.workout() == null
    }
}