Make the RoomInfo isPrivate field optional and handle it accordingly.

ElementX/Sources/Screens/HomeScreen/HomeScreenViewModel.swift

@@ -364,7 +364,7 @@ class HomeScreenViewModel: HomeScreenViewModelType, HomeScreenViewModelProtocol
                 return
             }
             
-            if !roomProxy.infoPublisher.value.isPrivate {
+            if !(roomProxy.infoPublisher.value.isPrivate ?? true) {
                 state.bindings.leaveRoomAlertItem = LeaveRoomAlertItem(roomID: roomID, isDM: roomProxy.isDirectOneToOneRoom, state: .public)
             } else {
                 state.bindings.leaveRoomAlertItem = if roomProxy.infoPublisher.value.joinedMembersCount > 1 {

ElementX/Sources/Screens/RoomDetailsScreen/RoomDetailsScreenViewModel.swift

@@ -125,7 +125,7 @@ class RoomDetailsScreenViewModel: RoomDetailsScreenViewModelType, RoomDetailsScr
             }
             state.bindings.leaveRoomAlertItem = LeaveRoomAlertItem(roomID: roomProxy.id,
                                                                    isDM: roomProxy.isDirectOneToOneRoom,
-                                                                   state: roomProxy.infoPublisher.value.isPrivate ? .private : .public)
+                                                                   state: roomProxy.infoPublisher.value.isPrivate ?? true ? .private : .public)
         case .confirmLeave:
             Task { await leaveRoom() }
         case .processTapIgnore:

ElementX/Sources/Screens/Timeline/TimelineViewModel.swift

@@ -92,7 +92,7 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
         case .always:
             false
         case .privateOnly:
-            !roomProxy.infoPublisher.value.isPrivate
+            !(roomProxy.infoPublisher.value.isPrivate ?? true)
         case .never:
             true
         }
@@ -524,7 +524,7 @@ class TimelineViewModel: TimelineViewModelType, TimelineViewModelProtocol {
                 case .privateOnly:
                     guard let self else { return Just(false).eraseToAnyPublisher() }
                     return roomProxy.infoPublisher
-                        .map { !$0.isPrivate }
+                        .map { !($0.isPrivate ?? false) }
                         .removeDuplicates()
                         .eraseToAnyPublisher()
                 }

ElementX/Sources/Services/Room/RoomInfoProxyProtocol.swift

@@ -79,12 +79,18 @@ extension BaseRoomInfoProxyProtocol {
 
 extension RoomInfoProxyProtocol {
     /// A room might be non public but also not private given the fact that the join rule might be missing or unsupported.
-    var isPrivate: Bool {
+    var isPrivate: Bool? {
-        switch joinRule {
+        guard let joinRule else {
-        case .invite, .knock, .restricted, .knockRestricted:
+            return nil
+        }
+        
+        return switch joinRule {
+        case .invite, .knock, .restricted, .knockRestricted, .private:
             true
-        default:
+        case .public:
             false
+        case .custom: // We don't know how to handle this
+            nil
         }
     }
     

ElementX/Sources/Services/Room/RoomPowerLevelsProxy.swift

@@ -27,7 +27,7 @@ struct RoomPowerLevelsProxy: RoomPowerLevelsProxyProtocol {
     }
     
     func suggestedRole(forUser userID: String) -> RoomMemberRole {
-        let powerLevel = powerLevels.userPowerLevels()[userID] ?? 0
+        let powerLevel = powerLevels.userPowerLevels()[userID] ?? values.usersDefault
         return suggestedRoleForPowerLevel(powerLevel: powerLevel)
     }
     

ElementX/Sources/Services/Room/RoomProxyProtocol.swift

@@ -188,7 +188,7 @@ extension JoinedRoomProxyProtocol {
                     avatar: infoPublisher.value.avatar,
                     canonicalAlias: infoPublisher.value.canonicalAlias,
                     isEncrypted: infoPublisher.value.isEncrypted,
-                    isPublic: !infoPublisher.value.isPrivate,
+                    isPublic: !(infoPublisher.value.isPrivate ?? false),
                     isDirect: infoPublisher.value.isDirect)
     }