SP3.1: Update room settings for Spaces element-ios#5231

- Changed the Room Settings screen according to the new design
- Implemented the room access flow
- Added room upgrade support
- Implemented the room suggestion screen

RiotSwiftUI/Modules/Room/RoomAccess/RoomRestrictedAccessSpaceChooser/Service/RoomRestrictedAccessSpaceChooserItemsProcessor.swift

@@ -0,0 +1,60 @@
+// 
+// Copyright 2021 New Vector Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+class RoomRestrictedAccessSpaceChooserItemsProcessor: MatrixItemChooserProcessorProtocol {
+    
+    // MARK: Private
+    
+    private let roomId: String
+    private let session: MXSession
+
+    // MARK: Setup
+    
+    init(roomId: String, session: MXSession) {
+        self.roomId = roomId
+        self.session = session
+        self.dataSource = MatrixItemChooserRoomRestrictedAllowedParentsDataSource(roomId: roomId)
+    }
+    
+    // MARK: MatrixItemChooserSelectionProcessorProtocol
+    
+    private(set) var dataSource: MatrixItemChooserDataSource
+    
+    var loadingText: String? {
+        VectorL10n.roomAccessSettingsScreenSettingRoomAccess
+    }
+    
+    func computeSelection(withIds itemsIds: [String], completion: @escaping (Result<Void, Error>) -> Void) {
+//        DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
+//            completion(.success(()))
+//        }
+
+        session.matrixRestClient.setRoomJoinRule(.restricted, forRoomWithId: roomId, allowedParentIds: itemsIds) { response in
+            switch response {
+            case .failure(let error):
+                completion(.failure(error))
+            case .success:
+                completion(.success(()))
+            }
+        }
+    }
+    
+    func isItemIncluded(_ item: (MatrixListItemData)) -> Bool {
+        return true
+    }
+}