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//
// SettingsNavigationController.swift
// MullvadVPN
//
// Created by pronebird on 02/07/2020.
// Copyright © 2020 Mullvad VPN AB. All rights reserved.
//
import Foundation
import UIKit
enum SettingsNavigationRoute {
case root
case account
case preferences
case shortcuts
case problemReport
}
enum SettingsDismissReason {
case none
case userLoggedOut
}
protocol SettingsNavigationControllerDelegate: AnyObject {
func settingsNavigationController(
_ controller: SettingsNavigationController,
willNavigateTo route: SettingsNavigationRoute
)
func settingsNavigationController(
_ controller: SettingsNavigationController,
didFinishWithReason reason: SettingsDismissReason
)
}
class SettingsNavigationController: CustomNavigationController, SettingsViewControllerDelegate,
AccountViewControllerDelegate, UIAdaptivePresentationControllerDelegate
{
weak var settingsDelegate: SettingsNavigationControllerDelegate?
override var childForStatusBarStyle: UIViewController? {
return topViewController
}
override var childForStatusBarHidden: UIViewController? {
return topViewController
}
init() {
super.init(navigationBarClass: CustomNavigationBar.self, toolbarClass: nil)
navigationBar.prefersLargeTitles = true
// Navigation controller ignores `prefersLargeTitles` when using `setViewControllers()`.
pushViewController(makeViewController(for: .root), animated: false)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func willPop(navigationItem: UINavigationItem) {
let index = viewControllers.firstIndex { $0.navigationItem == navigationItem }
if viewControllers.count > 1, index == 1 {
settingsDelegate?.settingsNavigationController(self, willNavigateTo: .root)
}
}
// MARK: - SettingsViewControllerDelegate
func settingsViewControllerDidFinish(_ controller: SettingsViewController) {
settingsDelegate?.settingsNavigationController(self, didFinishWithReason: .none)
}
// MARK: - AccountViewControllerDelegate
func accountViewControllerDidLogout(_ controller: AccountViewController) {
settingsDelegate?.settingsNavigationController(self, didFinishWithReason: .userLoggedOut)
}
// MARK: - Navigation
func navigate(to route: SettingsNavigationRoute, animated: Bool) {
guard route != .root else {
popToRootViewController(animated: animated)
return
}
settingsDelegate?.settingsNavigationController(self, willNavigateTo: route)
let nextViewController = makeViewController(for: route)
if let rootController = viewControllers.first, viewControllers.count > 1 {
setViewControllers([rootController, nextViewController], animated: animated)
} else {
pushViewController(nextViewController, animated: animated)
}
}
private func makeViewController(for route: SettingsNavigationRoute) -> UIViewController {
switch route {
case .root:
let settingsController = SettingsViewController()
settingsController.delegate = self
return settingsController
case .account:
let controller = AccountViewController()
controller.delegate = self
return controller
case .preferences:
return PreferencesViewController()
case .shortcuts:
return ShortcutsViewController()
case .problemReport:
return ProblemReportViewController()
}
}
// MARK: - UIAdaptivePresentationControllerDelegate
func presentationControllerDidDismiss(_ presentationController: UIPresentationController) {
settingsDelegate?.settingsNavigationController(self, didFinishWithReason: .none)
}
}
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