ViewModel with usecases

TransactionsViewModelWIthUseCase.kt

class TransactionsViewModelImpl(
    private val getUserTransactionsUseCase: GetUserTransactionsUseCase
) : TransactionsViewModel, ViewModel() {

    private val compositeDisposable = CompositeDisposable()

    override val transactions = MutableLiveData<List<Transaction>>()
    override val showProgress = MutableLiveData<Boolean>()
    override val showError = MutableLiveData<Boolean>()
    override val showContent = MutableLiveData<Boolean>()

    override fun loadTransactions() {
        setLoadState()
        getUserTransactionsUseCase()
            .subscribeBy {
                handleResult(it)
            }.addTo(compositeDisposable)
    }

    private fun setLoadState() {
        showProgress.postValue(true)
        showError.postValue(false)
        showContent.postValue(false)
    }

    private fun handleResult(result: Result<List<Transaction>>) {
        when (result) {
            is Result.Success -> setContentState(result.value)
            is Result.Failure -> setErrorState()
        }
    }

    private fun setContentState(transactionsResult: List<Transaction>) {
        showContent.postValue(true)
        transactions.postValue(transactionsResult)
        showProgress.postValue(false)
        showError.postValue(false)
    }

    private fun setErrorState() {
        showError.postValue(true)
        showProgress.postValue(false)
        showContent.postValue(false)
    }

    override fun onCleared() {
        compositeDisposable.clear()
        super.onCleared()
    }

}