Final changes for Room Moderation (#2576)

* Add confirmation that the user would like to discard unsaved changes.

* Update string on permissions screen.

* Fix UI tests and update snapshots.

* Fix integration tests.

* Run periphery for Moderation feature.

ElementX/Sources/Screens/RoomChangePermissionsScreen/RoomChangePermissionsScreenModels.swift

@@ -43,6 +43,8 @@ struct RoomChangePermissionsScreenViewStateBindings: BindableState {
 }
 
 enum RoomChangePermissionsScreenAlertType {
+    /// A confirmation that the user would like to discard any unsaved changes.
+    case discardChanges
     /// The generic error message.
     case generic
 }
@@ -50,6 +52,8 @@ enum RoomChangePermissionsScreenAlertType {
 enum RoomChangePermissionsScreenViewAction {
     /// Save the permissions.
     case save
+    /// Discard any changes and hide the screen.
+    case cancel
 }
 
 extension RoomChangePermissionsScreenViewState {

ElementX/Sources/Screens/RoomChangePermissionsScreen/RoomChangePermissionsScreenViewModel.swift

@@ -49,6 +49,8 @@ class RoomChangePermissionsScreenViewModel: RoomChangePermissionsScreenViewModel
         switch viewAction {
         case .save:
             Task { await save() }
+        case .cancel:
+            confirmDiscardChanges()
         }
     }
     
@@ -83,6 +85,14 @@ class RoomChangePermissionsScreenViewModel: RoomChangePermissionsScreenViewModel
         }
     }
     
+    private func confirmDiscardChanges() {
+        state.bindings.alertInfo = AlertInfo(id: .discardChanges,
+                                             title: L10n.screenRoomChangeRoleUnsavedChangesTitle,
+                                             message: L10n.screenRoomChangeRoleUnsavedChangesDescription,
+                                             primaryButton: .init(title: L10n.actionSave) { Task { await self.save() } },
+                                             secondaryButton: .init(title: L10n.actionDiscard, role: .cancel) { self.actionsSubject.send(.complete) })
+    }
+    
     // MARK: Loading indicator
     
     private static let indicatorID = "SavingRoomPermissions"

ElementX/Sources/Screens/RoomChangePermissionsScreen/View/RoomChangePermissionsScreen.swift

@@ -35,6 +35,7 @@ struct RoomChangePermissionsScreen: View {
         .compoundList()
         .navigationTitle(context.viewState.title)
         .navigationBarTitleDisplayMode(.inline)
+        .navigationBarBackButtonHidden(context.viewState.hasChanges)
         .toolbar { toolbar }
         .alert(item: $context.alertInfo)
     }
@@ -47,6 +48,14 @@ struct RoomChangePermissionsScreen: View {
             }
             .disabled(!context.viewState.hasChanges)
         }
+        
+        if context.viewState.hasChanges {
+            ToolbarItem(placement: .cancellationAction) {
+                Button(L10n.actionCancel) {
+                    context.send(viewAction: .cancel)
+                }
+            }
+        }
     }
 }