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

Riot/Modules/KeyVerification/Common/Loading/KeyVerificationDataLoadingViewController.swift

@@ -0,0 +1,177 @@
+// File created from ScreenTemplate
+// $ createScreen.sh DeviceVerification/Loading DeviceVerificationDataLoading
+/*
+ Copyright 2019 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 KeyVerificationDataLoadingViewController: UIViewController {
+    
+    // MARK: - Properties
+    
+    // MARK: Outlets
+    
+    // MARK: Private
+
+    private var viewModel: KeyVerificationDataLoadingViewModelType!
+    private var theme: Theme!
+    private var errorPresenter: MXKErrorPresentation!
+    private var activityPresenter: ActivityIndicatorPresenter!
+
+    // MARK: - Setup
+    
+    class func instantiate(with viewModel: KeyVerificationDataLoadingViewModelType) -> KeyVerificationDataLoadingViewController {
+        let viewController = StoryboardScene.KeyVerificationDataLoadingViewController.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.deviceVerificationTitle
+        self.vc_removeBackTitle()
+        
+        self.setupViews()
+
+        self.activityPresenter = 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 viewWillAppear(_ animated: Bool) {
+        super.viewWillAppear(animated)
+        
+        // Hide back button
+        self.navigationItem.setHidesBackButton(true, 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)
+        }
+    }
+    
+    private func registerThemeServiceDidChangeThemeNotification() {
+        NotificationCenter.default.addObserver(self, selector: #selector(themeDidChange), name: .themeServiceDidChangeTheme, object: nil)
+    }
+    
+    private func setupViews() {
+        let cancelBarButtonItem = MXKBarButtonItem(title: VectorL10n.cancel, style: .plain) { [weak self] in
+            self?.cancelButtonAction()
+        }
+        
+        self.navigationItem.rightBarButtonItem = cancelBarButtonItem
+    }
+
+    private func render(viewState: KeyVerificationDataLoadingViewState) {
+        switch viewState {
+        case .loading:
+            self.renderLoading()
+        case .loaded:
+            self.renderLoaded()
+        case .error(let error):
+            self.render(error: error)
+        case .errorMessage(let message):
+            self.renderError(message: message)
+        }
+    }
+    
+    private func renderLoading() {
+        self.activityPresenter.presentActivityIndicator(on: self.view, animated: true)
+    }
+    
+    private func renderLoaded() {
+        self.activityPresenter.removeCurrentActivityIndicator(animated: true)
+    }
+    
+    private func render(error: Error) {
+        
+        var shouldDisplayError = true
+        var message: String?
+        
+        switch error {
+        case KeyVerificationDataLoadingViewModelError.transactionCancelled:
+            message = VectorL10n.deviceVerificationCancelled
+        case KeyVerificationDataLoadingViewModelError.transactionCancelledByMe(reason: let reason):
+            if reason.value != MXTransactionCancelCode.user().value {
+                message = VectorL10n.deviceVerificationCancelledByMe(reason.humanReadable)
+            } else {
+                shouldDisplayError = false
+            }
+        default:
+            break
+        }
+        
+        if shouldDisplayError {
+            
+            let completion = {
+                self.viewModel.process(viewAction: .cancel)
+            }
+            
+            if let message = message {
+                self.errorPresenter.presentError(from: self, title: "", message: message, animated: true, handler: completion)
+            } else {
+                self.errorPresenter.presentError(from: self, forError: error, animated: true, handler: completion)
+            }
+        }
+    }
+
+    private func renderError(message: String) {
+        self.errorPresenter.presentError(from: self, title: "", message: message, animated: true, handler: {
+            self.viewModel.process(viewAction: .cancel)
+        })
+    }
+
+    // MARK: - Actions
+
+    @objc private func themeDidChange() {
+        self.update(theme: ThemeService.shared().theme)
+    }
+
+    private func cancelButtonAction() {
+        self.viewModel.process(viewAction: .cancel)
+    }
+}
+
+
+// MARK: - KeyVerificationDataLoadingViewModelViewDelegate
+extension KeyVerificationDataLoadingViewController: KeyVerificationDataLoadingViewModelViewDelegate {
+
+    func keyVerificationDataLoadingViewModel(_ viewModel: KeyVerificationDataLoadingViewModelType, didUpdateViewState viewSate: KeyVerificationDataLoadingViewState) {
+        self.render(viewState: viewSate)
+    }
+}