Key Backup: Add a screen for recovering with the local private key

Riot/Modules/KeyBackup/Recover/PrivateKey/KeyBackupRecoverFromPrivateKeyViewController.swift

@@ -0,0 +1,158 @@
+// File created from ScreenTemplate
+// $ createScreen.sh .KeyBackup/Recover/PrivateKey KeyBackupRecoverFromPrivateKey
+/*
+ Copyright 2020 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 UIKit
+
+final class KeyBackupRecoverFromPrivateKeyViewController: UIViewController {
+    
+    // MARK: - Constants
+    
+    // MARK: - Properties
+    
+    // MARK: Outlets
+
+    @IBOutlet private weak var shieldImageView: UIImageView!
+    
+    @IBOutlet private weak var informationLabel: UILabel!
+    
+    // MARK: Private
+
+    private var viewModel: KeyBackupRecoverFromPrivateKeyViewModelType!
+    private var theme: Theme!
+    private var errorPresenter: MXKErrorPresentation!
+    private var activityPresenter: ActivityIndicatorPresenter!
+
+    // MARK: - Setup
+    
+    class func instantiate(with viewModel: KeyBackupRecoverFromPrivateKeyViewModelType) -> KeyBackupRecoverFromPrivateKeyViewController {
+        let viewController = StoryboardScene.KeyBackupRecoverFromPrivateKeyViewController.initialScene.instantiate()
+        viewController.viewModel = viewModel
+        viewController.theme = ThemeService.shared().theme
+        return viewController
+    }
+    
+    // MARK: - Life cycle
+    
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        
+        // Do any additional setup after loading the view.
+        
+        self.title = VectorL10n.keyBackupRecoverTitle
+        
+        self.setupViews()
+        self.activityPresenter = ActivityIndicatorPresenter()
+        self.errorPresenter = MXKErrorAlertPresentation()
+        
+        self.registerThemeServiceDidChangeThemeNotification()
+        self.update(theme: self.theme)
+        
+        self.viewModel.viewDelegate = self
+
+        self.viewModel.process(viewAction: .recover)
+    }
+
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+    }
+    
+    override func viewDidDisappear(_ animated: Bool) {
+        super.viewDidDisappear(animated)
+    }
+    
+    override var preferredStatusBarStyle: UIStatusBarStyle {
+        return self.theme.statusBarStyle
+    }
+    
+    
+    // MARK: - Private
+    
+    private func registerThemeServiceDidChangeThemeNotification() {
+        NotificationCenter.default.addObserver(self, selector: #selector(themeDidChange), name: .themeServiceDidChangeTheme, object: nil)
+    }
+    
+    @objc private func themeDidChange() {
+        self.update(theme: ThemeService.shared().theme)
+    }
+    
+    private func setupViews() {
+        let cancelBarButtonItem = MXKBarButtonItem(title: VectorL10n.cancel, style: .plain) { [weak self] in
+            self?.cancelButtonAction()
+        }
+        self.navigationItem.rightBarButtonItem = cancelBarButtonItem
+        
+        let shieldImage = Asset.Images.keyBackupLogo.image.withRenderingMode(.alwaysTemplate)
+        self.shieldImageView.image = shieldImage
+        
+        self.informationLabel.text = VectorL10n.keyBackupRecoverFromPrivateKeyInfo
+    }
+    
+    private func update(theme: Theme) {
+        self.theme = theme
+        
+        self.view.backgroundColor = theme.headerBackgroundColor
+        
+        if let navigationBar = self.navigationController?.navigationBar {
+            theme.applyStyle(onNavigationBar: navigationBar)
+        }
+        
+        self.shieldImageView.tintColor = theme.textPrimaryColor
+        
+        self.informationLabel.textColor = theme.textPrimaryColor
+    }
+
+    private func render(viewState: KeyBackupRecoverFromPrivateKeyViewState) {
+        switch viewState {
+        case .loading:
+            self.renderLoading()
+        case .loaded:
+            self.renderLoaded()
+        case .error(let error):
+            self.render(error: error)
+        }
+    }
+    
+    private func renderLoading() {
+        self.activityPresenter.presentActivityIndicator(on: self.view, animated: true)
+    }
+    
+    private func renderLoaded() {
+        self.activityPresenter.removeCurrentActivityIndicator(animated: true)
+    }
+    
+    private func render(error: Error) {
+        self.activityPresenter.removeCurrentActivityIndicator(animated: true)
+        self.errorPresenter.presentError(from: self, forError: error, animated: true, handler: nil)
+    }
+
+    
+    // MARK: - Actions
+
+    private func cancelButtonAction() {
+        self.viewModel.process(viewAction: .cancel)
+    }
+}
+
+
+// MARK: - KeyBackupRecoverFromPrivateKeyViewModelViewDelegate
+extension KeyBackupRecoverFromPrivateKeyViewController: KeyBackupRecoverFromPrivateKeyViewModelViewDelegate {
+
+    func keyBackupRecoverFromPrivateKeyViewModel(_ viewModel: KeyBackupRecoverFromPrivateKeyViewModelType, didUpdateViewState viewSate: KeyBackupRecoverFromPrivateKeyViewState) {
+        self.render(viewState: viewSate)
+    }
+}