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AuthenticationViewController.swift
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AuthenticationViewController.swift
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//
// AuthenticationViewController.swift
// DuckDuckGo
//
// Copyright © 2017 DuckDuckGo. All rights reserved.
//
// 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
class AuthenticationViewController: UIViewController {
override var preferredStatusBarStyle: UIStatusBarStyle {
return ThemeManager.shared.currentTheme.statusBarStyle
}
@IBOutlet weak var logo: UIImageView!
@IBOutlet weak var unlockInstructions: UIView!
private let authenticator = Authenticator()
private var completion: (() -> Void)?
static func loadFromStoryboard() -> AuthenticationViewController {
let storyboard = UIStoryboard(name: "Authentication", bundle: nil)
guard let controller = storyboard.instantiateInitialViewController() as? AuthenticationViewController else {
fatalError("Failed to instantiate correct Authentication view controller")
}
return controller
}
override func viewDidLoad() {
super.viewDidLoad()
hideUnlockInstructions()
applyTheme(ThemeManager.shared.currentTheme)
}
override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
return .portrait
}
public func beginAuthentication(completion: (() -> Void)?) {
self.completion = completion
if authenticator.canAuthenticate() {
authenticate()
} else {
onCouldNotAuthenticate()
}
}
private func authenticate() {
hideUnlockInstructions()
authenticator.authenticate { (success, _) in
if success {
self.onAuthenticationSucceeded()
} else {
self.onAuthenticationFailed()
}
}
}
@IBAction func onTap(_ sender: Any) {
authenticate()
}
private func onCouldNotAuthenticate() {
completion?()
dismiss(animated: true, completion: nil)
}
private func onAuthenticationSucceeded() {
completion?()
dismiss(animated: true, completion: nil)
}
private func onAuthenticationFailed() {
showUnlockInstructions()
}
private func hideUnlockInstructions() {
unlockInstructions.isHidden = true
}
private func showUnlockInstructions() {
unlockInstructions.isHidden = false
}
}
extension AuthenticationViewController: Themable {
func decorate(with theme: Theme) {
view.backgroundColor = theme.backgroundColor
switch theme.currentImageSet {
case .light:
logo?.image = UIImage(named: "LogoDarkText")
case .dark:
logo?.image = UIImage(named: "LogoLightText")
}
}
}