Create key back setup intro view controller

Riot/Modules/KeyBackup/Setup/Intro/KeyBackupSetupIntroViewController.swift

@@ -0,0 +1,115 @@
+/*
+ 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
+
+protocol KeyBackupSetupIntroViewControllerDelegate: class {
+    func keyBackupSetupIntroViewControllerDidTapSetupAction(_ keyBackupSetupIntroViewController: KeyBackupSetupIntroViewController)
+    func keyBackupSetupIntroViewControllerDidCancel(_ keyBackupSetupIntroViewController: KeyBackupSetupIntroViewController)
+}
+
+final class KeyBackupSetupIntroViewController: UIViewController {
+    
+    // MARK: - Properties
+    
+    // MARK: Outlets
+    
+    @IBOutlet private weak var titleLabel: UILabel!
+    @IBOutlet private weak var informationLabel: UILabel!
+    
+    @IBOutlet private weak var setUpButtonBackgroundView: UIView!
+    @IBOutlet private weak var setUpButton: UIButton!
+    
+    // MARK: Private
+    
+    private var theme: Theme!
+    
+    // MARK: Public
+    
+    weak var delegate: KeyBackupSetupIntroViewControllerDelegate?
+    
+    // MARK: - Setup
+    
+    class func instantiate() -> KeyBackupSetupIntroViewController {
+        let viewController = StoryboardScene.KeyBackupSetupIntroViewController.initialScene.instantiate()
+        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.keyBackupSetupTitle
+        self.vc_removeBackTitle()
+        
+        self.setupViews()
+        self.registerThemeServiceDidChangeThemeNotification()
+        self.update(theme: self.theme)
+    }
+    
+    override var preferredStatusBarStyle: UIStatusBarStyle {
+        return self.theme.statusBarStyle
+    }
+    
+    // MARK: - Private
+    
+    private func setupViews() {
+        let cancelBarButtonItem = MXKBarButtonItem(title: VectorL10n.keyBackupSetupSkipAction, style: .plain) { [weak self] in
+            if let sself = self {
+                sself.delegate?.keyBackupSetupIntroViewControllerDidCancel(sself)
+            }
+        }
+        self.navigationItem.rightBarButtonItem = cancelBarButtonItem
+        
+        self.titleLabel.text = VectorL10n.keyBackupSetupIntroTitle
+        self.informationLabel.text = VectorL10n.keyBackupSetupIntroInfo
+        self.setUpButton.setTitle(VectorL10n.keyBackupSetupIntroSetupAction, for: .normal)
+    }
+    
+    private func update(theme: Theme) {
+        self.theme = theme
+        
+        self.view.backgroundColor = theme.headerBackgroundColor
+        
+        if let navigationBar = self.navigationController?.navigationBar {
+            theme.applyStyle(onNavigationBar: navigationBar)
+        }
+        
+        self.titleLabel.textColor = theme.textPrimaryColor
+        self.informationLabel.textColor = theme.textPrimaryColor
+        
+        self.setUpButtonBackgroundView.backgroundColor = theme.backgroundColor
+        theme.applyStyle(onButton: self.setUpButton)
+    }
+    
+    private func registerThemeServiceDidChangeThemeNotification() {
+        NotificationCenter.default.addObserver(self, selector: #selector(themeDidChange), name: .themeServiceDidChangeTheme, object: nil)
+    }
+    
+    // MARK: - Actions
+    
+    @objc private func themeDidChange() {
+        self.update(theme: ThemeService.shared().theme)
+    }
+    
+    @IBAction private func validateButtonAction(_ sender: Any) {
+        self.delegate?.keyBackupSetupIntroViewControllerDidTapSetupAction(self)
+    }
+}