Implemented UpdateConfiguration intent

Signed-off-by: Alessio Nossa <alessio.nossa@gmail.com>

6 files changed, 358 insertions, 1 deletions

diff --git a/Sources/Shared/Intents.intentdefinition b/Sources/Shared/Intents.intentdefinition
index 38f8e54..590fa39 100644
--- a/Sources/Shared/Intents.intentdefinition
+++ b/Sources/Shared/Intents.intentdefinition
@@ -150,6 +150,216 @@
 			<key>INIntentVerb</key>
 			<string>Do</string>
 		</dict>
+		<dict>
+			<key>INIntentCategory</key>
+			<string>generic</string>
+			<key>INIntentConfigurable</key>
+			<true/>
+			<key>INIntentDescription</key>
+			<string>Update peers configuration. Configuration must be provided with the same format as the following example. The fields you can update are: "Endpoint".
+The fields and the peers you omit will not be modified.
+
+Example
+{ "Peer1 Public Key (Base64)": { "Endpoint": "1.2.3.4:4321" },
+  "Peer2 Public Key (Base64)": {"Endpoint": "10.11.12.13:6789"} }</string>
+			<key>INIntentDescriptionID</key>
+			<string>uTimVO</string>
+			<key>INIntentIneligibleForSuggestions</key>
+			<true/>
+			<key>INIntentInput</key>
+			<string>configuration</string>
+			<key>INIntentLastParameterTag</key>
+			<integer>5</integer>
+			<key>INIntentManagedParameterCombinations</key>
+			<dict>
+				<key>tunnel,configuration,completionUrl</key>
+				<dict>
+					<key>INIntentParameterCombinationSupportsBackgroundExecution</key>
+					<true/>
+					<key>INIntentParameterCombinationTitle</key>
+					<string>Update ${tunnel} configuration</string>
+					<key>INIntentParameterCombinationTitleID</key>
+					<string>2ASDIM</string>
+					<key>INIntentParameterCombinationUpdatesLinked</key>
+					<true/>
+				</dict>
+			</dict>
+			<key>INIntentName</key>
+			<string>UpdateConfiguration</string>
+			<key>INIntentParameters</key>
+			<array>
+				<dict>
+					<key>INIntentParameterConfigurable</key>
+					<true/>
+					<key>INIntentParameterDisplayName</key>
+					<string>Tunnel</string>
+					<key>INIntentParameterDisplayNameID</key>
+					<string>TjOtzk</string>
+					<key>INIntentParameterDisplayPriority</key>
+					<integer>1</integer>
+					<key>INIntentParameterMetadata</key>
+					<dict>
+						<key>INIntentParameterMetadataCapitalization</key>
+						<string>Sentences</string>
+						<key>INIntentParameterMetadataDefaultValueID</key>
+						<string>h56bAD</string>
+					</dict>
+					<key>INIntentParameterName</key>
+					<string>tunnel</string>
+					<key>INIntentParameterPromptDialogs</key>
+					<array>
+						<dict>
+							<key>INIntentParameterPromptDialogCustom</key>
+							<true/>
+							<key>INIntentParameterPromptDialogType</key>
+							<string>Configuration</string>
+						</dict>
+						<dict>
+							<key>INIntentParameterPromptDialogCustom</key>
+							<true/>
+							<key>INIntentParameterPromptDialogType</key>
+							<string>Primary</string>
+						</dict>
+					</array>
+					<key>INIntentParameterSupportsDynamicEnumeration</key>
+					<true/>
+					<key>INIntentParameterTag</key>
+					<integer>1</integer>
+					<key>INIntentParameterType</key>
+					<string>String</string>
+				</dict>
+				<dict>
+					<key>INIntentParameterConfigurable</key>
+					<true/>
+					<key>INIntentParameterDisplayName</key>
+					<string>Configuration</string>
+					<key>INIntentParameterDisplayNameID</key>
+					<string>3SLMhb</string>
+					<key>INIntentParameterDisplayPriority</key>
+					<integer>2</integer>
+					<key>INIntentParameterMetadata</key>
+					<dict>
+						<key>INIntentParameterMetadataCapitalization</key>
+						<string>None</string>
+						<key>INIntentParameterMetadataDefaultValue</key>
+						<string>{"Peer Public Key": {"Endpoint":"1.2.3.4:5678"} }</string>
+						<key>INIntentParameterMetadataDefaultValueID</key>
+						<string>1J2FBa</string>
+						<key>INIntentParameterMetadataDisableAutocorrect</key>
+						<true/>
+						<key>INIntentParameterMetadataDisableSmartDashes</key>
+						<true/>
+						<key>INIntentParameterMetadataDisableSmartQuotes</key>
+						<true/>
+						<key>INIntentParameterMetadataMultiline</key>
+						<true/>
+					</dict>
+					<key>INIntentParameterName</key>
+					<string>configuration</string>
+					<key>INIntentParameterPromptDialogs</key>
+					<array>
+						<dict>
+							<key>INIntentParameterPromptDialogCustom</key>
+							<true/>
+							<key>INIntentParameterPromptDialogType</key>
+							<string>Configuration</string>
+						</dict>
+						<dict>
+							<key>INIntentParameterPromptDialogCustom</key>
+							<true/>
+							<key>INIntentParameterPromptDialogType</key>
+							<string>Primary</string>
+						</dict>
+					</array>
+					<key>INIntentParameterTag</key>
+					<integer>2</integer>
+					<key>INIntentParameterType</key>
+					<string>String</string>
+				</dict>
+				<dict>
+					<key>INIntentParameterConfigurable</key>
+					<true/>
+					<key>INIntentParameterDisplayName</key>
+					<string>Open URL when done</string>
+					<key>INIntentParameterDisplayNameID</key>
+					<string>dwpgmC</string>
+					<key>INIntentParameterDisplayPriority</key>
+					<integer>3</integer>
+					<key>INIntentParameterMetadata</key>
+					<dict>
+						<key>INIntentParameterMetadataCapitalization</key>
+						<string>None</string>
+						<key>INIntentParameterMetadataDefaultValue</key>
+						<string>shortcuts://</string>
+						<key>INIntentParameterMetadataDefaultValueID</key>
+						<string>cyr6LU</string>
+						<key>INIntentParameterMetadataDisableAutocorrect</key>
+						<true/>
+						<key>INIntentParameterMetadataDisableSmartDashes</key>
+						<true/>
+						<key>INIntentParameterMetadataDisableSmartQuotes</key>
+						<true/>
+					</dict>
+					<key>INIntentParameterName</key>
+					<string>completionUrl</string>
+					<key>INIntentParameterPromptDialogs</key>
+					<array>
+						<dict>
+							<key>INIntentParameterPromptDialogCustom</key>
+							<true/>
+							<key>INIntentParameterPromptDialogType</key>
+							<string>Configuration</string>
+						</dict>
+						<dict>
+							<key>INIntentParameterPromptDialogCustom</key>
+							<true/>
+							<key>INIntentParameterPromptDialogType</key>
+							<string>Primary</string>
+						</dict>
+					</array>
+					<key>INIntentParameterTag</key>
+					<integer>5</integer>
+					<key>INIntentParameterType</key>
+					<string>String</string>
+				</dict>
+			</array>
+			<key>INIntentResponse</key>
+			<dict>
+				<key>INIntentResponseCodes</key>
+				<array>
+					<dict>
+						<key>INIntentResponseCodeName</key>
+						<string>success</string>
+						<key>INIntentResponseCodeSuccess</key>
+						<true/>
+					</dict>
+					<dict>
+						<key>INIntentResponseCodeName</key>
+						<string>failure</string>
+					</dict>
+					<dict>
+						<key>INIntentResponseCodeConciseFormatString</key>
+						<string>The configuration update provided is not in the right format. Make sure you pass configuration as described in Action description.</string>
+						<key>INIntentResponseCodeConciseFormatStringID</key>
+						<string>xB99X4</string>
+						<key>INIntentResponseCodeFormatString</key>
+						<string>The configuration update provided is not in the right format. Make sure you pass configuration as described in Action description.</string>
+						<key>INIntentResponseCodeFormatStringID</key>
+						<string>UljpyD</string>
+						<key>INIntentResponseCodeName</key>
+						<string>wrongConfiguration</string>
+					</dict>
+				</array>
+			</dict>
+			<key>INIntentTitle</key>
+			<string>Update Configuration</string>
+			<key>INIntentTitleID</key>
+			<string>iYtEWT</string>
+			<key>INIntentType</key>
+			<string>Custom</string>
+			<key>INIntentVerb</key>
+			<string>Do</string>
+		</dict>
 	</array>
 	<key>INTypes</key>
 	<array/>
diff --git a/Sources/WireGuardApp/UI/iOS/AppDelegate.swift b/Sources/WireGuardApp/UI/iOS/AppDelegate.swift
index 4172b33..45ffa2b 100644
--- a/Sources/WireGuardApp/UI/iOS/AppDelegate.swift
+++ b/Sources/WireGuardApp/UI/iOS/AppDelegate.swift
@@ -3,6 +3,7 @@
 
 import UIKit
 import os.log
+import Intents
 
 @UIApplicationMain
 class AppDelegate: UIResponder, UIApplicationDelegate {
@@ -105,3 +106,92 @@ extension AppDelegate {
         return nil
     }
 }
+
+extension AppDelegate {
+
+    func application(_ application: UIApplication, continue userActivity: NSUserActivity, restorationHandler: @escaping ([UIUserActivityRestoring]?) -> Void) -> Bool {
+
+        guard let interaction = userActivity.interaction else {
+            return false
+        }
+
+        if interaction.intent is UpdateConfigurationIntent {
+            if let tunnelsManager = tunnelsManager {
+                self.handleupdateConfigurationIntent(interaction: interaction, tunnelsManager: tunnelsManager)
+            } else {
+                var token: NSObjectProtocol?
+                token = NotificationCenter.default.addObserver(forName: AppDelegate.tunnelsManagerReadyNotificationName, object: nil, queue: .main) { [weak self] _ in
+                    guard let tunnelsManager = self?.tunnelsManager else { return }
+
+                    self?.handleupdateConfigurationIntent(interaction: interaction, tunnelsManager: tunnelsManager)
+                    NotificationCenter.default.removeObserver(token!)
+                }
+            }
+
+            return true
+        }
+
+        return false
+    }
+
+    func handleupdateConfigurationIntent(interaction: INInteraction, tunnelsManager: TunnelsManager) {
+
+        guard let updateConfigurationIntent = interaction.intent as? UpdateConfigurationIntent,
+              let configurationUpdates = interaction.intentResponse?.userActivity?.userInfo else {
+            return
+        }
+
+        guard let tunnelName = updateConfigurationIntent.tunnel,
+              let configurations = configurationUpdates["Configuration"] as? [String: [String: String]] else {
+                  wg_log(.error, message: "Failed to get informations to update the configuration")
+                  return
+        }
+
+        guard let tunnel = tunnelsManager.tunnel(named: tunnelName),
+              let tunnelConfiguration = tunnel.tunnelConfiguration else {
+                  wg_log(.error, message: "Failed to get tunnel configuration with name \(tunnelName)")
+                  ErrorPresenter.showErrorAlert(title: "Tunnel not found",
+                                                message: "Tunnel with name '\(tunnelName)' is not present.",
+                                                from: self.mainVC)
+                  return
+        }
+
+        var peers = tunnelConfiguration.peers
+
+        for (peerPubKey, valuesToUpdate) in configurations {
+            guard let peerIndex = peers.firstIndex(where: { $0.publicKey.base64Key == peerPubKey }) else {
+                wg_log(.debug, message: "Failed to find peer \(peerPubKey) in tunnel with name \(tunnelName)")
+                ErrorPresenter.showErrorAlert(title: "Peer not found",
+                                              message: "Peer '\(peerPubKey)' is not present in '\(tunnelName)' tunnel.",
+                                              from: self.mainVC)
+                continue
+            }
+
+            if let endpointString = valuesToUpdate["Endpoint"] {
+                if let newEntpoint = Endpoint(from: endpointString) {
+                    peers[peerIndex].endpoint = newEntpoint
+                } else {
+                    wg_log(.debug, message: "Failed to convert \(endpointString) to Endpoint")
+                }
+            }
+        }
+
+        let newConfiguration = TunnelConfiguration(name: tunnel.name, interface: tunnelConfiguration.interface, peers: peers)
+
+        tunnelsManager.modify(tunnel: tunnel, tunnelConfiguration: newConfiguration, onDemandOption: tunnel.onDemandOption) { error in
+            guard error == nil else {
+                wg_log(.error, message: error!.localizedDescription)
+                ErrorPresenter.showErrorAlert(error: error!, from: self.mainVC)
+                return
+            }
+
+            if let completionUrlString = updateConfigurationIntent.completionUrl,
+                !completionUrlString.isEmpty,
+                let completionUrl = URL(string: completionUrlString) {
+                UIApplication.shared.open(completionUrl, options: [:], completionHandler: nil)
+            }
+
+            wg_log(.debug, message: "Updated configuration of tunnel \(tunnelName)")
+        }
+    }
+}
diff --git a/Sources/WireGuardApp/UI/iOS/Info.plist b/Sources/WireGuardApp/UI/iOS/Info.plist
index 754d12c..101d0a7 100644
--- a/Sources/WireGuardApp/UI/iOS/Info.plist
+++ b/Sources/WireGuardApp/UI/iOS/Info.plist
@@ -82,6 +82,10 @@
 	<string>Localized</string>
 	<key>NSFaceIDUsageDescription</key>
 	<string>Localized</string>
+	<key>NSUserActivityTypes</key>
+	<array>
+		<string>UpdateConfigurationIntent</string>
+	</array>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIRequiredDeviceCapabilities</key>
diff --git a/Sources/WireGuardIntentsExtension/Info.plist b/Sources/WireGuardIntentsExtension/Info.plist
index 35910e1..06ec3ab 100644
--- a/Sources/WireGuardIntentsExtension/Info.plist
+++ b/Sources/WireGuardIntentsExtension/Info.plist
@@ -33,6 +33,7 @@
 			<key>IntentsSupported</key>
 			<array>
 				<string>GetPeersIntent</string>
+				<string>UpdateConfigurationIntent</string>
 			</array>
 		</dict>
 		<key>NSExtensionPointIdentifier</key>
diff --git a/Sources/WireGuardIntentsExtension/IntentHandler.swift b/Sources/WireGuardIntentsExtension/IntentHandler.swift
index 4567b49..62eb5e2 100644
--- a/Sources/WireGuardIntentsExtension/IntentHandler.swift
+++ b/Sources/WireGuardIntentsExtension/IntentHandler.swift
@@ -11,7 +11,7 @@ class IntentHandler: INExtension {
     }
 
     override func handler(for intent: INIntent) -> Any {
-        guard intent is GetPeersIntent else {
+        guard intent is GetPeersIntent || intent is UpdateConfigurationIntent else {
             fatalError("Unhandled intent type: \(intent)")
         }
 
diff --git a/Sources/WireGuardIntentsExtension/IntentHandling.swift b/Sources/WireGuardIntentsExtension/IntentHandling.swift
index d946160..1de3d46 100644
--- a/Sources/WireGuardIntentsExtension/IntentHandling.swift
+++ b/Sources/WireGuardIntentsExtension/IntentHandling.swift
@@ -118,3 +118,55 @@ extension IntentHandling: GetPeersIntentHandling {
     }
 
 }
+
+extension IntentHandling: UpdateConfigurationIntentHandling {
+
+    @available(iOSApplicationExtension 14.0, *)
+    func provideTunnelOptionsCollection(for intent: UpdateConfigurationIntent, with completion: @escaping (INObjectCollection<NSString>?, Error?) -> Void) {
+        self.allTunnelNames { tunnelsNames in
+            let tunnelsNamesObjects = (tunnelsNames ?? []).map { NSString(string: $0) }
+
+            let objectCollection = INObjectCollection(items: tunnelsNamesObjects)
+            completion(objectCollection, nil)
+        }
+    }
+
+    func handle(intent: UpdateConfigurationIntent, completion: @escaping (UpdateConfigurationIntentResponse) -> Void) {
+        // Due to an Apple bug (https://developer.apple.com/forums/thread/96020) we can't update VPN
+        // configuration from extensions at the moment, so we should handle the action in the app.
+        // We check that the configuration update data is valid and then launch the main app.
+
+        guard let tunnelName = intent.tunnel,
+              let configurationString = intent.configuration else {
+                  wg_log(.error, message: "Failed to get informations to update the configuration")
+                  completion(UpdateConfigurationIntentResponse(code: .failure, userActivity: nil))
+                  return
+        }
+
+        var configurations: [String: [String: String]]
+
+        let configurationsData = Data(configurationString.utf8)
+        do {
+            // Make sure this JSON is in the format we expect
+            if let decodedJson = try JSONSerialization.jsonObject(with: configurationsData, options: []) as? [String: [String: String]] {
+                configurations = decodedJson
+            } else {
+                throw IntentError.failedDecode
+            }
+        } catch _ {
+            wg_log(.error, message: "Failed to decode configuration data in JSON format for \(tunnelName)")
+            completion(UpdateConfigurationIntentResponse(code: .wrongConfiguration, userActivity: nil))
+            return
+        }
+
+        var activity: NSUserActivity?
+        if let bundleIdentifier = Bundle.main.bundleIdentifier {
+            activity = NSUserActivity(activityType: "\(bundleIdentifier).activity.update-tunnel-config")
+            activity?.userInfo = ["TunnelName": tunnelName,
+                                  "Configuration": configurations]
+        }
+
+        completion(UpdateConfigurationIntentResponse(code: .continueInApp, userActivity: activity))
+    }
+
+}