Refactor DeviceVerification prefix classes to KeyVerification where needed. And move key verification related classes into the same module KeyVerification.

Riot/Modules/KeyVerification/User/SessionsStatus/UserVerificationSessionsStatusViewController.swift

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+// File created from ScreenTemplate
+// $ createScreen.sh UserVerification UserVerificationSessionsStatus
+/*
+ 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 UserVerificationSessionsStatusViewController: UIViewController {
+    
+    // MARK: - Constants
+    
+    private enum Constants {
+        static let estimatedRowHeight: CGFloat = 40.0
+    }
+    
+    // MARK: - Properties
+    
+    // MARK: Outlets
+    
+    @IBOutlet private weak var badgeImageImageView: UIImageView!
+    @IBOutlet private weak var titleLabel: UILabel!
+    @IBOutlet private weak var closeButton: UIButton!
+    @IBOutlet private weak var informationLabel: UILabel!
+    @IBOutlet private weak var sessionsTableViewTitle: UILabel!
+    @IBOutlet private weak var tableView: UITableView!
+    
+    // MARK: Private
+
+    private var viewModel: UserVerificationSessionsStatusViewModelType!
+    private var theme: Theme!
+    private var errorPresenter: MXKErrorPresentation!
+    private var activityIndicatorPresenter: ActivityIndicatorPresenter!
+    private var sessionsStatusViewData: [UserVerificationSessionStatusViewData] = []
+    private var userEncryptionTrustLevel: UserEncryptionTrustLevel = .unknown
+
+    // MARK: - Setup
+    
+    class func instantiate(with viewModel: UserVerificationSessionsStatusViewModelType) -> UserVerificationSessionsStatusViewController {
+        let viewController = StoryboardScene.UserVerificationSessionsStatusViewController.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.setupViews()
+        self.vc_removeBackTitle()
+        self.activityIndicatorPresenter = ActivityIndicatorPresenter()
+        self.errorPresenter = MXKErrorAlertPresentation()
+        
+        self.registerThemeServiceDidChangeThemeNotification()
+        self.update(theme: self.theme)
+        
+        self.viewModel.viewDelegate = self
+
+        self.viewModel.process(viewAction: .loadData)
+    }
+    
+    override var preferredStatusBarStyle: UIStatusBarStyle {
+        return self.theme.statusBarStyle
+    }
+    
+    override func viewDidLayoutSubviews() {
+        super.viewDidLayoutSubviews()
+        
+        self.closeButton.layer.cornerRadius = self.closeButton.frame.size.width/2
+    }
+    
+    override func viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        if let selectedIndexPath = self.tableView.indexPathForSelectedRow {
+            self.tableView.deselectRow(at: selectedIndexPath, animated: animated)
+        }
+    }
+    
+    // MARK: - Private
+    
+    private func update(theme: Theme) {
+        self.theme = theme
+        
+        self.view.backgroundColor = theme.headerBackgroundColor
+        
+        if let navigationBar = self.navigationController?.navigationBar {
+            theme.applyStyle(onNavigationBar: navigationBar)
+        }
+        
+        self.closeButton.vc_setBackgroundColor(theme.headerTextSecondaryColor, for: .normal)
+        self.titleLabel.textColor = theme.textPrimaryColor
+        self.informationLabel.textColor = theme.textPrimaryColor
+        self.sessionsTableViewTitle.textColor = theme.textPrimaryColor
+    }
+    
+    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() {
+        self.closeButton.layer.masksToBounds = true
+        self.setupTableView()
+        self.updateTitleViews()
+        
+        self.sessionsTableViewTitle.text = VectorL10n.userVerificationSessionsListTableTitle
+        self.informationLabel.text = VectorL10n.userVerificationSessionsListInformation
+    }
+    
+    private func setupTableView() {
+        self.tableView.rowHeight = UITableView.automaticDimension
+        self.tableView.estimatedRowHeight = Constants.estimatedRowHeight
+        self.tableView.separatorStyle = .none
+        self.tableView.tableFooterView = UIView()
+        self.tableView.alwaysBounceVertical = false
+        
+        self.tableView.register(cellType: UserVerificationSessionStatusCell.self)
+    }
+    
+    private func render(viewState: UserVerificationSessionsStatusViewState) {
+        switch viewState {
+        case .loading:
+            self.renderLoading()
+        case .loaded(userTrustLevel: let userTrustLevel, sessionsStatusViewData: let sessionsStatusViewData):
+            self.renderLoaded(userTrustLevel: userTrustLevel, sessionsStatusViewData: sessionsStatusViewData)
+        case .error(let error):
+            self.render(error: error)
+        }
+    }
+
+    private func renderLoading() {
+        self.tableView.isUserInteractionEnabled = false
+        self.activityIndicatorPresenter.presentActivityIndicator(on: self.view, animated: true)
+    }
+    
+    private func renderLoaded(userTrustLevel: UserEncryptionTrustLevel, sessionsStatusViewData: [UserVerificationSessionStatusViewData]) {
+        self.activityIndicatorPresenter.removeCurrentActivityIndicator(animated: true)
+        self.tableView.isUserInteractionEnabled = true
+        
+        self.userEncryptionTrustLevel = userTrustLevel
+        self.sessionsStatusViewData = sessionsStatusViewData
+        
+        self.updateTitleViews()
+        self.tableView.reloadData()
+    }
+    
+    private func render(error: Error) {
+        self.activityIndicatorPresenter.removeCurrentActivityIndicator(animated: true)
+        self.tableView.isUserInteractionEnabled = true
+        self.errorPresenter.presentError(from: self, forError: error, animated: true, handler: nil)
+    }
+    
+    private func updateTitleViews() {
+        
+        let badgeImage: UIImage
+        let title: String
+        
+        switch self.userEncryptionTrustLevel {
+        case .trusted:
+            badgeImage = Asset.Images.encryptionTrusted.image
+            title = VectorL10n.userVerificationSessionsListUserTrustLevelTrustedTitle
+        case .warning:
+            badgeImage = Asset.Images.encryptionWarning.image
+            title = VectorL10n.userVerificationSessionsListUserTrustLevelWarningTitle
+        default:
+            badgeImage = Asset.Images.encryptionNormal.image
+            title = VectorL10n.userVerificationSessionsListUserTrustLevelUnknownTitle
+        }
+        
+        self.badgeImageImageView.image = badgeImage
+        self.titleLabel.text = title
+    }
+    
+    // MARK: - Actions
+
+    @IBAction private func closeButtonAction(_ sender: Any) {
+        self.viewModel.process(viewAction: .close)
+    }
+}
+
+// MARK: - UITableViewDataSource
+extension UserVerificationSessionsStatusViewController: UITableViewDataSource {
+    
+    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
+        return self.sessionsStatusViewData.count
+    }
+    
+    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
+        let cell = tableView.dequeueReusableCell(for: indexPath, cellType: UserVerificationSessionStatusCell.self)
+        
+        let viewData = self.sessionsStatusViewData[indexPath.row]
+        
+        cell.update(theme: self.theme)
+        cell.fill(viewData: viewData)
+        
+        return cell
+    }
+}
+
+// MARK: - UITableViewDelegate
+extension UserVerificationSessionsStatusViewController: UITableViewDelegate {
+    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
+        let viewData = self.sessionsStatusViewData[indexPath.row]
+        self.viewModel.process(viewAction: .selectSession(deviceId: viewData.deviceId))
+    }
+}
+
+// MARK: - UserVerificationSessionsStatusViewModelViewDelegate
+extension UserVerificationSessionsStatusViewController: UserVerificationSessionsStatusViewModelViewDelegate {
+
+    func userVerificationSessionsStatusViewModel(_ viewModel: UserVerificationSessionsStatusViewModelType, didUpdateViewState viewSate: UserVerificationSessionsStatusViewState) {
+        self.render(viewState: viewSate)
+    }
+}