ViewModel.kt

class ProgressBarViewModel @ViewModelInject constructor(
    private val progressBarRepository: ProgressBarRepository
) : ViewModel() {

    // Display seconds
    val countDown: LiveData<String> = progressBarRepository.data.map {
        it.time.toString()
    }.asLiveData().distinctUntilChanged()

    // Progress state of circle bar
    val progress: LiveData<Int> = progressBarRepository.data.map {
        it.progress
    }.asLiveData().distinctUntilChanged()
  
    fun start() {
       viewModelScope.launch {
           // Count down 10 seconds
           progressBarRepository.startCountDown(10)
       }
   }
}