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//
// DeviceManagementViewController.swift
// MullvadVPN
//
// Created by pronebird on 15/07/2022.
// Copyright © 2022 Mullvad VPN AB. All rights reserved.
//
import MullvadLogging
import MullvadREST
import Operations
import UIKit
protocol DeviceManagementViewControllerDelegate: AnyObject {
func deviceManagementViewControllerDidFinish(_ controller: DeviceManagementViewController)
func deviceManagementViewControllerDidCancel(_ controller: DeviceManagementViewController)
}
class DeviceManagementViewController: UIViewController, RootContainment {
weak var delegate: DeviceManagementViewControllerDelegate?
var preferredHeaderBarPresentation: HeaderBarPresentation {
return .default
}
var prefersHeaderBarHidden: Bool {
return false
}
override var preferredStatusBarStyle: UIStatusBarStyle {
return .lightContent
}
private let alertPresenter = AlertPresenter()
private let contentView: DeviceManagementContentView = {
let contentView = DeviceManagementContentView()
contentView.translatesAutoresizingMaskIntoConstraints = false
return contentView
}()
private let logger = Logger(label: "DeviceManagementViewController")
private let interactor: DeviceManagementInteractor
init(interactor: DeviceManagementInteractor) {
self.interactor = interactor
super.init(nibName: nil, bundle: nil)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .secondaryColor
view.addSubview(contentView)
contentView.backButton.addTarget(
self,
action: #selector(didTapBackButton(_:)),
for: .touchUpInside
)
contentView.continueButton.addTarget(
self,
action: #selector(didTapContinueButton(_:)),
for: .touchUpInside
)
contentView.handleDeviceDeletion = { [weak self] viewModel, finish in
self?.handleDeviceDeletion(viewModel, completionHandler: finish)
}
NSLayoutConstraint.activate([
contentView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
contentView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
contentView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
contentView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
])
}
func fetchDevices(
animateUpdates: Bool,
completionHandler: ((OperationCompletion<Void, Error>) -> Void)? = nil
) {
interactor.getDevices { [weak self] completion in
guard let self = self else { return }
if let devices = completion.value {
self.setDevices(devices, animated: animateUpdates)
}
completionHandler?(completion.ignoreOutput())
}
}
// MARK: - Private
private func setDevices(_ devices: [REST.Device], animated: Bool) {
let viewModels = devices.map { restDevice -> DeviceViewModel in
return DeviceViewModel(
id: restDevice.id,
name: restDevice.name
)
}
contentView.canContinue = viewModels.count < ApplicationConfiguration.maxAllowedDevices
contentView.setDeviceViewModels(viewModels, animated: animated)
}
private func handleDeviceDeletion(
_ device: DeviceViewModel,
completionHandler: @escaping () -> Void
) {
showDeleteConfirmation(deviceName: device.displayName) { [weak self] shouldDelete in
guard let self = self else { return }
guard shouldDelete else {
completionHandler()
return
}
self.deleteDevice(identifier: device.id) { error in
if let error = error {
self.showErrorAlert(
title: NSLocalizedString(
"LOGOUT_DEVICE_ERROR_ALERT_TITLE",
tableName: "DeviceManagement",
value: "Failed to log out device",
comment: ""
),
error: error
)
}
completionHandler()
}
}
}
private func getErrorDescription(_ error: Error) -> String {
if case let .network(urlError) = error as? REST.Error {
return urlError.localizedDescription
} else {
return error.localizedDescription
}
}
private func showErrorAlert(title: String, error: Error) {
let alertController = UIAlertController(
title: title,
message: getErrorDescription(error),
preferredStyle: .alert
)
alertController.addAction(
UIAlertAction(
title: NSLocalizedString(
"ERROR_ALERT_OK_ACTION",
tableName: "DeviceManagement",
value: "OK",
comment: ""
),
style: .cancel
)
)
alertPresenter.enqueue(alertController, presentingController: self)
}
private func showDeleteConfirmation(
deviceName: String,
completion: @escaping (_ shouldDelete: Bool) -> Void
) {
let localizedTitle = String(
format: NSLocalizedString(
"DELETE_ALERT_TITLE",
tableName: "DeviceManagement",
value: "Are you sure you want to log out of %@?",
comment: ""
), deviceName
)
let alertController = UIAlertController(
title: localizedTitle,
message: nil,
preferredStyle: .alert
)
let actions = [
UIAlertAction(
title: NSLocalizedString(
"DELETE_ALERT_CANCEL_ACTION",
tableName: "DeviceManagement",
value: "Back",
comment: ""
),
style: .cancel,
handler: { _ in
completion(false)
}
),
UIAlertAction(
title: NSLocalizedString(
"DELETE_ALERT_CONFIRM_ACTION",
tableName: "DeviceManagement",
value: "Yes, log out device",
comment: ""
),
style: .destructive,
handler: { _ in
completion(true)
}
),
]
for action in actions {
alertController.addAction(action)
}
alertPresenter.enqueue(alertController, presentingController: self)
}
private func deleteDevice(identifier: String, completionHandler: @escaping (Error?) -> Void) {
interactor.deleteDevice(identifier) { [weak self] completion in
guard let self = self else { return }
switch completion {
case .success:
self.fetchDevices(animateUpdates: true) { completion in
completionHandler(completion.error)
}
case let .failure(error):
self.logger.error(
error: error,
message: "Failed to delete device."
)
completionHandler(error)
case .cancelled:
completionHandler(nil)
}
}
}
// MARK: - Actions
@objc private func didTapBackButton(_ sender: Any?) {
delegate?.deviceManagementViewControllerDidCancel(self)
}
@objc private func didTapContinueButton(_ sender: Any?) {
delegate?.deviceManagementViewControllerDidFinish(self)
}
}
struct DeviceViewModel {
var id: String
var name: String
var displayName: String {
return name.capitalized
}
}
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