implemented a way to filter out roles that can't be assigned to permission, and disable permissions that are above the current power level of the user.

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

@@ -32,7 +32,9 @@ struct RoomChangePermissionsScreen: View {
             Section {
                 ForEach(settings) { $setting in
                     ListRow(label: .plain(title: setting.title),
-                            kind: .picker(selection: $setting.value, items: setting.allValues))
+                            kind: .picker(selection: $setting.roleValue,
+                                          items: setting.availableValues))
+                        .disabled(setting.isDisabled)
                 }
             } header: {
                 Text(group.name)
@@ -64,6 +66,7 @@ struct RoomChangePermissionsScreen: View {
 
 struct RoomChangePermissionsScreen_Previews: PreviewProvider, TestablePreview {
     static let roomViewModel = makeViewModel(isSpace: false)
+    static let roomAsUserViewModel = makeViewModel(isSpace: false, ownPowerLevel: RoomRole.user.powerLevel)
     static let spaceViewModel = makeViewModel(isSpace: true)
     
     static var previews: some View {
@@ -72,14 +75,20 @@ struct RoomChangePermissionsScreen_Previews: PreviewProvider, TestablePreview {
         }
         .previewDisplayName("Room")
         
+        NavigationStack {
+            RoomChangePermissionsScreen(context: roomAsUserViewModel.context)
+        }
+        .previewDisplayName("Room as User")
+        
         NavigationStack {
             RoomChangePermissionsScreen(context: spaceViewModel.context)
         }
         .previewDisplayName("Space")
     }
     
-    static func makeViewModel(isSpace: Bool) -> RoomChangePermissionsScreenViewModel {
+    static func makeViewModel(isSpace: Bool, ownPowerLevel: RoomPowerLevel = RoomRole.creator.powerLevel) -> RoomChangePermissionsScreenViewModel {
         RoomChangePermissionsScreenViewModel(currentPermissions: .init(powerLevels: .mock),
+                                             ownPowerLevel: ownPowerLevel,
                                              roomProxy: JoinedRoomProxyMock(.init(isSpace: isSpace)),
                                              userIndicatorController: UserIndicatorControllerMock(),
                                              analytics: ServiceLocator.shared.analytics)