Removing a tunnel from iOS's settings is now immediately reflected in app

Signed-off-by: Eric Kuck <eric@bluelinelabs.com>

WireGuard/WireGuard/Tunnel/TunnelsManager.swift

@@ -53,6 +53,28 @@ class TunnelsManager {
         #endif
     }
     
+    func reload(completionHandler: @escaping (Bool) -> Void) {
+        #if targetEnvironment(simulator)
+        completionHandler(.success(false))
+        #else
+        NETunnelProviderManager.loadAllFromPreferences { managers, _ in
+            guard let managers = managers else {
+                completionHandler(false)
+                return
+            }
+            
+            let newTunnels = managers.map { TunnelContainer(tunnel: $0) }.sorted { $0.name < $1.name }
+            let hasChanges = self.tunnels.map { $0.name } != newTunnels.map { $0.name }
+            if hasChanges {
+                self.tunnels = newTunnels
+                completionHandler(true)
+            } else {
+                completionHandler(false)
+            }
+        }
+        #endif
+    }
+
     func add(tunnelConfiguration: TunnelConfiguration, activateOnDemandSetting: ActivateOnDemandSetting = ActivateOnDemandSetting.defaultSetting, completionHandler: @escaping (WireGuardResult<TunnelContainer>) -> Void) {
         let tunnelName = tunnelConfiguration.name ?? ""
         if tunnelName.isEmpty {
@@ -255,8 +277,6 @@ class TunnelsManager {
     }
 
     private func startObservingTunnelStatuses() {
-        guard statusObservationToken == nil else { return }
-
         statusObservationToken = NotificationCenter.default.addObserver(forName: .NEVPNStatusDidChange, object: nil, queue: OperationQueue.main) { [weak self] statusChangeNotification in
             guard let self = self,
                 let session = statusChangeNotification.object as? NETunnelProviderSession,
@@ -265,14 +285,13 @@ class TunnelsManager {
 
             wg_log(.debug, message: "Tunnel '\(tunnel.name)' connection status changed to '\(tunnel.tunnelProvider.connection.status)'")
 
-            // Track what happened to our attempt to start the tunnel
             if tunnel.isAttemptingActivation {
                 if session.status == .connected {
                     tunnel.isAttemptingActivation = false
                     self.activationDelegate?.tunnelActivationSucceeded(tunnel: tunnel)
                 } else if session.status == .disconnected {
                     tunnel.isAttemptingActivation = false
-                    if let (title, message) = self.lastErrorTextFromNetworkExtension(for: tunnel) {
+                    if let (title, message) = lastErrorTextFromNetworkExtension(for: tunnel) {
                         self.activationDelegate?.tunnelActivationFailed(tunnel: tunnel, error: .activationFailedWithExtensionError(title: title, message: message, wasOnDemandEnabled: tunnelProvider.isOnDemandEnabled))
                     } else {
                         self.activationDelegate?.tunnelActivationFailed(tunnel: tunnel, error: .activationFailed(wasOnDemandEnabled: tunnelProvider.isOnDemandEnabled))
@@ -280,9 +299,7 @@ class TunnelsManager {
                 }
             }
 
-            // In case we're restarting the tunnel
             if (tunnel.status == .restarting) && (session.status == .disconnected || session.status == .disconnecting) {
-                // Don't change tunnel.status when disconnecting for a restart
                 if session.status == .disconnected {
                     tunnel.startActivation(activationDelegate: self.activationDelegate)
                 }
@@ -293,11 +310,12 @@ class TunnelsManager {
         }
     }
 
-    func lastErrorTextFromNetworkExtension(for tunnel: TunnelContainer) -> (title: String, message: String)? {
+}
+
+private func lastErrorTextFromNetworkExtension(for tunnel: TunnelContainer) -> (title: String, message: String)? {
     guard let lastErrorFileURL = FileManager.networkExtensionLastErrorFileURL else { return nil }
     guard let lastErrorData = try? Data(contentsOf: lastErrorFileURL) else { return nil }
-        guard let lastErrorText = String(data: lastErrorData, encoding: .utf8) else { return nil }
+    guard let lastErrorStrings = String(data: lastErrorData, encoding: .utf8)?.splitToArray(separator: "\n") else { return nil }
-        let lastErrorStrings = lastErrorText.splitToArray(separator: "\n")
     guard lastErrorStrings.count == 2 && tunnel.activationAttemptId == lastErrorStrings[0] else { return nil }
     
     switch PacketTunnelProviderError(rawValue: lastErrorStrings[1]) {
@@ -314,14 +332,6 @@ class TunnelsManager {
     default:
         return (tr("alertTunnelActivationFailureTitle"), tr("alertTunnelActivationFailureMessage"))
     }
-    }
-
-    deinit {
-        if let statusObservationToken = statusObservationToken {
-            NotificationCenter.default.removeObserver(statusObservationToken)
-        }
-    }
-
 }
 
 class TunnelContainer: NSObject {

WireGuard/WireGuard/UI/iOS/AppDelegate.swift

@@ -10,8 +10,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     var window: UIWindow?
     var mainVC: MainViewController?
 
-    func application(_ application: UIApplication,
+    func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
-                     willFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         Logger.configureGlobal(withFilePath: FileManager.appLogFileURL?.path)
 
         let window = UIWindow(frame: UIScreen.main.bounds)
@@ -50,9 +49,7 @@ extension AppDelegate {
         return true
     }
 
-    func application(_ application: UIApplication,
+    func application(_ application: UIApplication, viewControllerWithRestorationIdentifierPath identifierComponents: [String], coder: NSCoder) -> UIViewController? {
-                     viewControllerWithRestorationIdentifierPath identifierComponents: [String],
-                     coder: NSCoder) -> UIViewController? {
         guard let vcIdentifier = identifierComponents.last else { return nil }
         if vcIdentifier.hasPrefix("TunnelDetailVC:") {
             let tunnelName = String(vcIdentifier.suffix(vcIdentifier.count - "TunnelDetailVC:".count))

WireGuard/WireGuard/UI/iOS/ViewController/MainViewController.swift

@@ -7,8 +7,8 @@ class MainViewController: UISplitViewController {
 
     var tunnelsManager: TunnelsManager?
     var onTunnelsManagerReady: ((TunnelsManager) -> Void)?
-
     var tunnelsListVC: TunnelsListTableViewController?
+    private var foregroundObservationToken: AnyObject?
 
     init() {
         let detailVC = UIViewController()
@@ -57,7 +57,31 @@ class MainViewController: UISplitViewController {
             self.onTunnelsManagerReady?(tunnelsManager)
             self.onTunnelsManagerReady = nil
         }
+        
+        foregroundObservationToken = NotificationCenter.default.addObserver(forName: UIApplication.willEnterForegroundNotification, object: nil, queue: OperationQueue.main) { [weak self] _ in
+            guard let self = self else { return }
+            self.tunnelsManager?.reload { [weak self] hasChanges in
+                guard let self = self, let tunnelsManager = self.tunnelsManager, hasChanges else { return }
+                
+                self.tunnelsListVC?.setTunnelsManager(tunnelsManager: tunnelsManager)
+                
+                if self.isCollapsed {
+                    (self.viewControllers[0] as? UINavigationController)?.popViewController(animated: false)
+                } else {
+                    let detailVC = UIViewController()
+                    detailVC.view.backgroundColor = .white
+                    let detailNC = UINavigationController(rootViewController: detailVC)
+                    self.showDetailViewController(detailNC, sender: self)
                 }
+                
+                if let presentedNavController = self.presentedViewController as? UINavigationController, presentedNavController.viewControllers.first is TunnelEditTableViewController {
+                    self.presentedViewController?.dismiss(animated: false, completion: nil)
+                }
+            }
+            
+        }
+    }
+
 }
 
 extension MainViewController: TunnelsManagerActivationDelegate {

WireGuard/WireGuard/UI/iOS/ViewController/TunnelDetailTableViewController.swift

@@ -3,8 +3,6 @@
 
 import UIKit
 
-// MARK: TunnelDetailTableViewController
-
 class TunnelDetailTableViewController: UITableViewController {
 
     private enum Section {
@@ -44,11 +42,6 @@ class TunnelDetailTableViewController: UITableViewController {
         fatalError("init(coder:) has not been implemented")
     }
 
-    deinit {
-        onDemandStatusObservationToken = nil
-        statusObservationToken = nil
-    }
-
     override func viewDidLoad() {
         super.viewDidLoad()
         title = tunnelViewModel.interfaceData[.name]
@@ -250,7 +243,7 @@ extension TunnelDetailTableViewController {
                         return
                     }
                 }
-                if self.splitViewController?.isCollapsed ?? true {
+                if self.splitViewController?.isCollapsed != false {
                     self.navigationController?.navigationController?.popToRootViewController(animated: true)
                 } else {
                     let detailVC = UIViewController()

WireGuard/WireGuardNetworkExtension/PacketTunnelProvider.swift

@@ -13,10 +13,6 @@ class PacketTunnelProvider: NEPacketTunnelProvider {
     private var lastFirstInterface: NWInterface?
     private var packetTunnelSettingsGenerator: PacketTunnelSettingsGenerator?
 
-    deinit {
-        networkMonitor?.cancel()
-    }
-
     override func startTunnel(options: [String: NSObject]?, completionHandler startTunnelCompletionHandler: @escaping (Error?) -> Void) {
         let activationAttemptId = options?["activationAttemptId"] as? String
         let errorNotifier = ErrorNotifier(activationAttemptId: activationAttemptId)