TodoDetailViewModel.kt

data class TodoDetail (
    val title: String,
    val description: String
    )

class TodoDetailViewModel: ViewModel() {
    private val _state = MutableLiveData<String>()
    val state: LiveData<String>
        get() = _state
    private val _detailError = MutableLiveData<Throwable>()
    val todoDetailError: LiveData<Throwable>
        get() = _detailError
    private val _todoSuccessData = MutableLiveData<TodoDetail>()
    val todoSuccessData: LiveData<TodoDetail>
        get() = _todoSuccessData
    
    
    companion object {
        const val SUCCESS = "success"
        const val ERROR = "loading"
        const val LOADING = "error"
    }
}