[Spaces] Space menu #4494

- First implementation of the space contextual menu

Riot/Modules/Spaces/SpaceMenu/SpaceMenuViewModel.swift

@@ -0,0 +1,50 @@
+// 
+// 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
+
+/// View model used by `SpaceMenuViewController`
+class SpaceMenuViewModel: SpaceMenuViewModelType {
+    
+    // MARK: - Enum
+    
+    enum ActionId: String {
+        case members = "members"
+        case rooms = "rooms"
+        case leave = "leave"
+    }
+    
+    // MARK: - Properties
+    
+    weak var coordinatorDelegate: SpaceMenuModelViewModelCoordinatorDelegate?
+    
+    var menuItems: [SpaceMenuListItemViewData] = [
+        SpaceMenuListItemViewData(actionId: ActionId.members.rawValue, style: .normal, title: VectorL10n.roomDetailsPeople, icon: UIImage(named: "space_menu_members")),
+        SpaceMenuListItemViewData(actionId: ActionId.rooms.rawValue, style: .normal, title: VectorL10n.groupDetailsRooms, icon: UIImage(named: "space_menu_rooms")),
+        SpaceMenuListItemViewData(actionId: ActionId.leave.rawValue, style: .destructive, title: VectorL10n.leave, icon: UIImage(named: "space_menu_leave"))
+    ]
+    
+    // MARK: - Public
+
+    func process(viewAction: SpaceMenuViewAction) {
+        switch viewAction {
+        case .dismiss:
+            self.coordinatorDelegate?.spaceListViewModelDidDismiss(self)
+        case .selectRow(at: let indexPath):
+            self.coordinatorDelegate?.spaceListViewModel(self, didSelectItemWithId: menuItems[indexPath.row].actionId)
+        }
+    }
+}