Fixes #734 - Add a "View logs" option to the report a problem screen

Move bug report and log viewer responsibility to a separate flow coordinator. Reuse it as a child coordinator in the authentication, userSessionFlow and settings flow coordinators.

ElementX/Sources/Screens/LogViewerScreen/LogViewerScreenCoordinator.swift

@@ -0,0 +1,60 @@
+//
+// 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.
+//
+
+// periphery:ignore:all - this is just a logViewer remove this comment once generating the final file
+
+import Combine
+import SwiftUI
+
+struct LogViewerScreenCoordinatorParameters { }
+
+enum LogViewerScreenCoordinatorAction {
+    case done
+}
+
+final class LogViewerScreenCoordinator: CoordinatorProtocol {
+    private let parameters: LogViewerScreenCoordinatorParameters
+    private var viewModel: LogViewerScreenViewModelProtocol
+    private var cancellables = Set<AnyCancellable>()
+    
+    private let actionsSubject: PassthroughSubject<LogViewerScreenCoordinatorAction, Never> = .init()
+    var actions: AnyPublisher<LogViewerScreenCoordinatorAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+    
+    init(parameters: LogViewerScreenCoordinatorParameters) {
+        self.parameters = parameters
+        
+        viewModel = LogViewerScreenViewModel()
+    }
+    
+    func start() {
+        viewModel.actions.sink { [weak self] action in
+            MXLog.info("Coordinator: received view model action: \(action)")
+            
+            guard let self else { return }
+            switch action {
+            case .done:
+                self.actionsSubject.send(.done)
+            }
+        }
+        .store(in: &cancellables)
+    }
+        
+    func toPresentable() -> AnyView {
+        AnyView(LogViewerScreen(context: viewModel.context))
+    }
+}

ElementX/Sources/Screens/LogViewerScreen/LogViewerScreenModels.swift

@@ -0,0 +1,29 @@
+//
+// 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 Foundation
+
+enum LogViewerScreenViewModelAction {
+    case done
+}
+
+struct LogViewerScreenViewState: BindableState {
+    let urls: [URL]
+}
+
+enum LogViewerScreenViewAction {
+    case done
+}

ElementX/Sources/Screens/LogViewerScreen/LogViewerScreenViewModel.swift

@@ -0,0 +1,43 @@
+//
+// 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
+
+typealias LogViewerScreenViewModelType = StateStoreViewModel<LogViewerScreenViewState, LogViewerScreenViewAction>
+
+class LogViewerScreenViewModel: LogViewerScreenViewModelType, LogViewerScreenViewModelProtocol {
+    private var actionsSubject: PassthroughSubject<LogViewerScreenViewModelAction, Never> = .init()
+    
+    var actions: AnyPublisher<LogViewerScreenViewModelAction, Never> {
+        actionsSubject.eraseToAnyPublisher()
+    }
+
+    init() {
+        super.init(initialViewState: LogViewerScreenViewState(urls: MXLogger.logFiles))
+    }
+    
+    // MARK: - Public
+    
+    override func process(viewAction: LogViewerScreenViewAction) {
+        MXLog.info("View model: received view action: \(viewAction)")
+        
+        switch viewAction {
+        case .done:
+            actionsSubject.send(.done)
+        }
+    }
+}

ElementX/Sources/Screens/LogViewerScreen/LogViewerScreenViewModelProtocol.swift

@@ -0,0 +1,23 @@
+//
+// 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
+
+@MainActor
+protocol LogViewerScreenViewModelProtocol {
+    var actions: AnyPublisher<LogViewerScreenViewModelAction, Never> { get }
+    var context: LogViewerScreenViewModelType.Context { get }
+}

ElementX/Sources/Screens/LogViewerScreen/View/LogViewerScreen.swift

@@ -0,0 +1,85 @@
+//
+// 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 Compound
+import QuickLook
+import SwiftUI
+
+struct LogViewerScreen: View {
+    @ObservedObject var context: LogViewerScreenViewModel.Context
+    
+    var body: some View {
+        PreviewView(urls: context.viewState.urls)
+    }
+}
+
+private struct PreviewView: UIViewControllerRepresentable {
+    let urls: [URL]
+
+    func makeUIViewController(context: Context) -> UIViewController {
+        let previewController = QLPreviewController()
+        previewController.dataSource = context.coordinator
+        previewController.delegate = context.coordinator
+        
+        if ProcessInfo.processInfo.isiOSAppOnMac {
+            return previewController
+        } else {
+            return UINavigationController(rootViewController: previewController)
+        }
+    }
+
+    func updateUIViewController(_ uiViewController: UIViewController, context: Context) { }
+
+    func makeCoordinator() -> Coordinator {
+        Coordinator(view: self)
+    }
+    
+    class Coordinator: NSObject, QLPreviewControllerDataSource, QLPreviewControllerDelegate {
+        let view: PreviewView
+
+        init(view: PreviewView) {
+            self.view = view
+        }
+        
+        // MARK: - QLPreviewControllerDataSource
+        
+        func numberOfPreviewItems(in controller: QLPreviewController) -> Int {
+            view.urls.count
+        }
+
+        func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
+            let url = view.urls[index]
+            
+            return PreviewItem(previewItemURL: url, previewItemTitle: url.lastPathComponent)
+        }
+        
+        // MARK: - QLPreviewControllerDelegate
+        
+        func previewController(_ controller: QLPreviewController, editingModeFor previewItem: QLPreviewItem) -> QLPreviewItemEditingMode {
+            .disabled
+        }
+    }
+}
+
+private class PreviewItem: NSObject, QLPreviewItem {
+    var previewItemURL: URL?
+    var previewItemTitle: String?
+
+    init(previewItemURL: URL?, previewItemTitle: String?) {
+        self.previewItemURL = previewItemURL
+        self.previewItemTitle = previewItemTitle
+    }
+}