NewServiceInMVVM.kt

class NewServiceViewModel(

  private val useCase: NewServiceUseCase
): ViewModel {  
  private val _cart: MutableLiveData<List<Product>>
  val cart: LiveData<List<Product>> get() = _cart
  
  private val _products: MutableLiveData<List<Product>>
  val products: LiveData<List<Product>> get() = _products
  
  private val _showLoader: MutableLiveData<Boolean>
  val showLoader: LiveData<Boolean>> get() = _showLoader
  
  suspend fun loadProducts(){
    _showLoader.post(true)
    _products.post(useCase.prepareProducts())
    _showLoader.post(false)
  } 
  suspend fun addProduct(product: Product){
    _card.post(useCase.addProduct(product))
  }
}