iOS: Show Home screen quick actions for recent tunnels

Signed-off-by: Roopesh Chander <roop@roopc.net>

WireGuard/WireGuard/UI/iOS/AppDelegate.swift

@@ -9,10 +9,17 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
 
     var window: UIWindow?
     var mainVC: MainViewController?
+    var isLaunchedForSpecificAction = false
 
     func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
         Logger.configureGlobal(tagged: "APP", withFilePath: FileManager.logFileURL?.path)
 
+        if let launchOptions = launchOptions {
+            if launchOptions[.url] != nil || launchOptions[.shortcutItem] != nil {
+                isLaunchedForSpecificAction = true
+            }
+        }
+
         let window = UIWindow(frame: UIScreen.main.bounds)
         window.backgroundColor = .white
         self.window = window
@@ -37,6 +44,21 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
     func applicationDidBecomeActive(_ application: UIApplication) {
         mainVC?.refreshTunnelConnectionStatuses()
     }
+
+    func applicationWillResignActive(_ application: UIApplication) {
+        guard let allTunnelNames = mainVC?.allTunnelNames() else { return }
+        application.shortcutItems = QuickActionItem.createItems(allTunnelNames: allTunnelNames)
+    }
+
+    func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) {
+        guard shortcutItem.type == QuickActionItem.type else {
+            completionHandler(false)
+            return
+        }
+        let tunnelName = shortcutItem.localizedTitle
+        mainVC?.showTunnelDetailForTunnel(named: tunnelName, animated: false, shouldToggleStatus: true)
+        completionHandler(true)
+    }
 }
 
 extension AppDelegate {
@@ -45,7 +67,7 @@ extension AppDelegate {
     }
 
     func application(_ application: UIApplication, shouldRestoreApplicationState coder: NSCoder) -> Bool {
-        return true
+        return !self.isLaunchedForSpecificAction
     }
 
     func application(_ application: UIApplication, viewControllerWithRestorationIdentifierPath identifierComponents: [String], coder: NSCoder) -> UIViewController? {
@@ -58,7 +80,7 @@ extension AppDelegate {
                 }
             } else {
                 // Show it when tunnelsManager is available
-                mainVC?.showTunnelDetailForTunnel(named: tunnelName, animated: false)
+                mainVC?.showTunnelDetailForTunnel(named: tunnelName, animated: false, shouldToggleStatus: false)
             }
         }
         return nil

WireGuard/WireGuard/UI/iOS/QuickActionItem.swift

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: MIT
+// Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
+
+import UIKit
+
+class QuickActionItem: UIApplicationShortcutItem {
+    static let type = "WireGuardTunnelActivateAndShow"
+
+    init(tunnelName: String) {
+        super.init(type: QuickActionItem.type, localizedTitle: tunnelName, localizedSubtitle: nil, icon: nil, userInfo: nil)
+    }
+
+    static func createItems(allTunnelNames: [String]) -> [QuickActionItem] {
+        let numberOfItems = 10
+        // Currently, only 4 items shown by iOS, but that can increase in the future.
+        // iOS will discard additional items we give it.
+        var tunnelNames = RecentTunnelsTracker.recentlyActivatedTunnelNames(limit: numberOfItems)
+        let numberOfSlotsRemaining = numberOfItems - tunnelNames.count
+        if numberOfSlotsRemaining > 0 {
+            let moreTunnels = allTunnelNames.filter { !tunnelNames.contains($0) }.prefix(numberOfSlotsRemaining)
+            tunnelNames.append(contentsOf: moreTunnels)
+        }
+        return tunnelNames.map { QuickActionItem(tunnelName: $0) }
+    }
+}

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

@@ -57,6 +57,10 @@ class MainViewController: UISplitViewController {
         }
     }
 
+    func allTunnelNames() -> [String]? {
+        guard let tunnelsManager = self.tunnelsManager else { return nil }
+        return tunnelsManager.mapTunnels { $0.name }
+    }
 }
 
 extension MainViewController: TunnelsManagerActivationDelegate {
@@ -84,7 +88,7 @@ extension MainViewController {
         }
     }
 
-    func showTunnelDetailForTunnel(named tunnelName: String, animated: Bool) {
+    func showTunnelDetailForTunnel(named tunnelName: String, animated: Bool, shouldToggleStatus: Bool) {
         let showTunnelDetailBlock: (TunnelsManager) -> Void = { [weak self] tunnelsManager in
             if let tunnel = tunnelsManager.tunnel(named: tunnelName) {
                 let tunnelDetailVC = TunnelDetailTableViewController(tunnelsManager: tunnelsManager, tunnel: tunnel)
@@ -99,6 +103,13 @@ extension MainViewController {
                         }
                     }
                 }
+                if shouldToggleStatus {
+                    if tunnel.status == .inactive {
+                        tunnelsManager.startActivation(of: tunnel)
+                    } else if tunnel.status == .active {
+                        tunnelsManager.startDeactivation(of: tunnel)
+                    }
+                }
             }
         }
         if let tunnelsManager = tunnelsManager {