Tusker/Tusker/Screens/Preferences/PreferencesNavigationContro...

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//
// PreferencesHostingController.swift
// Tusker
//
// Created by Shadowfacts on 11/17/19.
// Copyright © 2019 Shadowfacts. All rights reserved.
//
import UIKit
import SwiftUI
class PreferencesNavigationController: UINavigationController {
private var isSwitchingAccounts = false
init(mastodonController: MastodonController) {
let view = PreferencesView()
let hostingController = UIHostingController(rootView: view)
super.init(rootViewController: hostingController)
hostingController.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(donePressed))
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver(self, selector: #selector(showAddAccount), name: .addAccount, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(activateAccount(_:)), name: .activateAccount, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(userLoggedOut), name: .userLoggedOut, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
if !isSwitchingAccounts {
// workaround for onDisappear not being called when a modally presented UIHostingController is dismissed
NotificationCenter.default.post(name: .preferencesChanged, object: nil)
}
}
@objc func donePressed() {
dismiss(animated: true)
}
@objc func showAddAccount() {
let onboardingController = OnboardingViewController()
onboardingController.onboardingDelegate = self
onboardingController.instanceSelector.navigationItem.leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelAddAccount))
show(onboardingController, sender: self)
}
@objc func cancelAddAccount() {
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dismiss(animated: true) // dismisses instance selector
}
@objc func activateAccount(_ notification: Notification) {
// TODO: this is a temporary measure
// when switching accounts shortly after adding a new one, there is an old instance of PreferncesNavigationController still around
// which tries to handle the notification but is unable to because it no longer is in a window (and therefore doesn't have a scene delegate)
// the propper fix would be to figure out what's leaking instances of this class
guard let window = self.view.window,
let windowScene = window.windowScene,
let sceneDelegate = windowScene.delegate as? SceneDelegate else {
return
}
let account = notification.userInfo!["account"] as! LocalData.UserAccountInfo
isSwitchingAccounts = true
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dismiss(animated: true) { // dismiss preferences
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sceneDelegate.activateAccount(account, animated: true)
}
}
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@objc func userLoggedOut() {
guard let window = self.view.window,
let windowScene = window.windowScene,
let sceneDelegate = windowScene.delegate as? SceneDelegate else {
return
}
isSwitchingAccounts = true
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dismiss(animated: true) { // dismiss preferences
sceneDelegate.logoutCurrent()
}
}
}
extension PreferencesNavigationController: OnboardingViewControllerDelegate {
func didFinishOnboarding(account: LocalData.UserAccountInfo) {
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DispatchQueue.main.async {
let sceneDelegate = self.view.window!.windowScene!.delegate as! SceneDelegate
self.dismiss(animated: true) { // dismiss instance selector
self.dismiss(animated: true) { // dismiss preferences
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sceneDelegate.activateAccount(account, animated: false)
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}
}
}
}
}