SP3.1: Update room settings for Spaces #5231

- Update after review

RiotSwiftUI/Modules/Room/RoomUpgrade/RoomUpgradeViewModel.swift

@@ -0,0 +1,78 @@
+//
+// 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
+import Combine
+
+@available(iOS 14, *)
+typealias RoomUpgradeViewModelType = StateStoreViewModel<RoomUpgradeViewState,
+                                                                 Never,
+                                                                 RoomUpgradeViewAction>
+@available(iOS 14, *)
+class RoomUpgradeViewModel: RoomUpgradeViewModelType, RoomUpgradeViewModelProtocol {
+
+    // MARK: - Properties
+
+    // MARK: Private
+
+    private let roomUpgradeService: RoomUpgradeServiceProtocol
+
+    // MARK: Public
+
+    var completion: ((RoomUpgradeViewModelResult) -> Void)?
+
+    // MARK: - Setup
+
+    static func makeRoomUpgradeViewModel(roomUpgradeService: RoomUpgradeServiceProtocol) -> RoomUpgradeViewModelProtocol {
+        return RoomUpgradeViewModel(roomUpgradeService: roomUpgradeService)
+    }
+
+    private init(roomUpgradeService: RoomUpgradeServiceProtocol) {
+        self.roomUpgradeService = roomUpgradeService
+        super.init(initialViewState: Self.defaultState(roomUpgradeService: roomUpgradeService))
+        setupObservers()
+    }
+
+    private static func defaultState(roomUpgradeService: RoomUpgradeServiceProtocol) -> RoomUpgradeViewState {
+        let bindings = RoomUpgradeViewModelBindings(waitingMessage: nil, isLoading: false)
+        return RoomUpgradeViewState(bindings: bindings)
+    }
+    
+    private func setupObservers() {
+        roomUpgradeService
+            .upgradingSubject
+            .sink { [weak self] isUpgrading in
+                self?.state.bindings = RoomUpgradeViewModelBindings(waitingMessage: isUpgrading ? VectorL10n.roomAccessSettingsScreenUpgradeAlertUpgrading: nil, isLoading: isUpgrading)
+            }
+            .store(in: &cancellables)
+    }
+    
+    // MARK: - Public
+
+    override func process(viewAction: RoomUpgradeViewAction) {
+        switch viewAction {
+        case .cancel:
+            completion?(.cancel(roomUpgradeService.currentRoomId))
+        case .done(let autoInviteUsers):
+            roomUpgradeService.upgradeRoom(autoInviteUsers: autoInviteUsers) { [weak self] success, roomId in
+                guard let self = self else { return }
+                if success {
+                    self.completion?(.done(self.roomUpgradeService.currentRoomId))
+                }
+            }
+        }
+    }
+}