Device Manager: Rename Session (#6826)

* Publish the user sessions overview data.
* Add UserSessionName screen.
* Update logout action to match Figma more closely.

RiotSwiftUI/Modules/UserSessions/UserSessionName/UserSessionNameViewModel.swift

@@ -0,0 +1,45 @@
+//
+// 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 SwiftUI
+
+typealias UserSessionNameViewModelType = StateStoreViewModel<UserSessionNameViewState, UserSessionNameViewAction>
+
+class UserSessionNameViewModel: UserSessionNameViewModelType, UserSessionNameViewModelProtocol {
+    var completion: ((UserSessionNameViewModelResult) -> Void)?
+
+    init(sessionInfo: UserSessionInfo) {
+        super.init(initialViewState: UserSessionNameViewState(bindings: .init(sessionName: sessionInfo.name ?? ""),
+                                                              currentName: sessionInfo.name ?? ""))
+    }
+
+    // MARK: - Public
+
+    override func process(viewAction: UserSessionNameViewAction) {
+        switch viewAction {
+        case .done:
+            completion?(.updateName(state.bindings.sessionName))
+        case .cancel:
+            completion?(.cancel)
+        case .learnMore:
+            #warning("To be implemented as part of PSG-714.")
+        }
+    }
+    
+    func processError(_ error: NSError?) {
+        state.bindings.alertInfo = AlertInfo(error: error)
+    }
+}