добавил события, когда от сервера приходит ошибка и прислали пустой с…

app/src/main/java/com/example/android_curse/data/network/MockApi.kt

@@ -22,7 +22,7 @@ class MockApi : Api {
                     lastName = "bi",
                     userName = "biBob"
                 )
-            ),
+            ).flatMap { listOf(it, it, it, it, it, it) }.flatMap { listOf(it, it, it, it, it, it) },
             code=200
         )
     }

app/src/main/java/com/example/android_curse/ui/userlist/UserListFragment.kt

@@ -81,11 +81,25 @@ class UserListFragment : BaseFragment(R.layout.fragment_list_users) {
             is UserListViewModel.ViewState.Loading -> {
                 viewBinding.recyclerView.isVisible = false
                 viewBinding.progressBar.isVisible = true
+                viewBinding.errorText.isVisible = false
             }
             is UserListViewModel.ViewState.Data -> {
                 viewBinding.recyclerView.isVisible = true
                 (viewBinding.recyclerView.adapter as UserAdapter).userList.value = viewState.userList
                 viewBinding.progressBar.isVisible = false
+                viewBinding.errorText.isVisible = false
+            }
+            is UserListViewModel.ViewState.EmptyList -> {
+                viewBinding.recyclerView.isVisible = false
+                viewBinding.progressBar.isVisible = false
+                viewBinding.errorText.isVisible = true
+                viewBinding.errorText.text="увы у вас пока нет друзей"
+            }
+            is UserListViewModel.ViewState.Error -> {
+                viewBinding.recyclerView.isVisible = false
+                viewBinding.progressBar.isVisible = false
+                viewBinding.errorText.isVisible = true
+                viewBinding.errorText.text="возникла какае-та ошибка"
             }
         }
     }

app/src/main/java/com/example/android_curse/ui/userlist/UserListViewModel.kt

@@ -36,6 +36,8 @@ class UserListViewModel @Inject constructor(
 
     sealed class ViewState {
         object Loading : ViewState()
+        object Error : ViewState()
+        object EmptyList : ViewState()
         data class Data(val userList: List<User>) : ViewState()
     }
 
@@ -48,9 +50,15 @@ class UserListViewModel @Inject constructor(
             _viewState.emit(ViewState.Loading)
             when (val response = usersInteractor.loadUsers()){
                 is NetworkResponse.Success -> {
-                    _viewState.emit(ViewState.Data(response.body))
+                    val userList = response.body
+                    if (userList.isEmpty()){
+                        _viewState.emit(ViewState.EmptyList)
+                    }else {
+                        _viewState.emit(ViewState.Data(userList))
+                    }
                 }
                 else -> {
+                    _viewState.emit(ViewState.Error)
                 }
             }
         }

app/src/main/res/layout/fragment_list_users.xml

@@ -29,4 +29,16 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <TextView
+        android:id="@+id/error_text"
+        style="@style/TextAppearance.MaterialComponents.Headline5"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginHorizontal="100dp"
+        android:text="техт ошибки"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout><!--</androidx.fragment.app.FragmentContainerView>-->