Add a UserProfileScreen for profiles of non-members. (#2687)

ElementX/Sources/Screens/UserProfileScreen/UserProfileScreenCoordinator.swift

@@ -0,0 +1,67 @@
+//
+// Copyright 2022 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 Combine
+import SwiftUI
+
+struct UserProfileScreenCoordinatorParameters {
+    let userID: String
+    let clientProxy: ClientProxyProtocol
+    let mediaProvider: MediaProviderProtocol
+    let userIndicatorController: UserIndicatorControllerProtocol
+}
+
+enum UserProfileScreenCoordinatorAction {
+    case openDirectChat(displayName: String?)
+}
+
+final class UserProfileScreenCoordinator: CoordinatorProtocol {
+    private var viewModel: UserProfileScreenViewModelProtocol
+    
+    private var cancellables = Set<AnyCancellable>()
+    
+    private let actionsSubject: PassthroughSubject<UserProfileScreenCoordinatorAction, Never> = .init()
+    var actionsPublisher: AnyPublisher<UserProfileScreenCoordinatorAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+    
+    init(parameters: UserProfileScreenCoordinatorParameters) {
+        viewModel = UserProfileScreenViewModel(userID: parameters.userID,
+                                               clientProxy: parameters.clientProxy,
+                                               mediaProvider: parameters.mediaProvider,
+                                               userIndicatorController: parameters.userIndicatorController)
+    }
+    
+    func start() {
+        viewModel.actionsPublisher.sink { [weak self] action in
+            guard let self else { return }
+            
+            switch action {
+            case .openDirectChat(let displayName):
+                actionsSubject.send(.openDirectChat(displayName: displayName))
+            }
+        }
+        .store(in: &cancellables)
+    }
+    
+    func stop() {
+        viewModel.stop()
+    }
+    
+    func toPresentable() -> AnyView {
+        AnyView(UserProfileScreen(context: viewModel.context))
+    }
+}