feat(agent): add opt-in push notifications

ios/Apps/Sybil/Sources/SybilApp.swift

@@ -1,6 +1,7 @@
 import Sybil
 import SwiftUI
 import UIKit
+import UserNotifications
 
 @main
 struct SybilApp: App
@@ -18,11 +19,13 @@ struct SybilApp: App
 }
 
 @MainActor
-final class SybilAppDelegate: NSObject, UIApplicationDelegate {
+final class SybilAppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDelegate {
     func application(
         _ application: UIApplication,
         didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil
     ) -> Bool {
+        UNUserNotificationCenter.current().delegate = self
+        SybilPushNotifications.launchFixtureIfRequested()
         SybilHomeScreenQuickActionHandler.configureQuickActions()
         #if targetEnvironment(macCatalyst)
         SybilMacQuickQuestionController.shared.start()
@@ -30,6 +33,31 @@ final class SybilAppDelegate: NSObject, UIApplicationDelegate {
         return true
     }
 
+    func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) {
+        SybilPushNotifications.didRegister(deviceToken: deviceToken)
+    }
+
+    func application(_ application: UIApplication, didFailToRegisterForRemoteNotificationsWithError error: Error) {
+        SybilPushNotifications.didFailToRegister()
+    }
+
+    func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable: Any],
+                     fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
+        SybilPushNotifications.receiveBackground(userInfo: userInfo) { result in completionHandler(result) }
+    }
+
+    nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification) async -> UNNotificationPresentationOptions {
+        let event = SybilPushNotifications.Event(userInfo: notification.request.content.userInfo)
+        return await SybilPushNotifications.presentationOptions(event: event)
+    }
+
+    nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse) async {
+        if response.actionIdentifier == UNNotificationDefaultActionIdentifier {
+            let event = SybilPushNotifications.Event(userInfo: response.notification.request.content.userInfo)
+            await SybilPushNotifications.didRespond(event: event, identifier: response.notification.request.identifier)
+        }
+    }
+
     #if targetEnvironment(macCatalyst)
     func applicationWillTerminate(_ application: UIApplication) {
         SybilMacQuickQuestionController.shared.stop()
@@ -73,6 +101,9 @@ final class SybilSceneDelegate: NSObject, UIWindowSceneDelegate {
         if let shortcutItem = connectionOptions.shortcutItem {
             _ = SybilHomeScreenQuickActionHandler.handle(shortcutItem)
         }
+        if let response = connectionOptions.notificationResponse, response.actionIdentifier == UNNotificationDefaultActionIdentifier {
+            SybilPushNotifications.didRespond(userInfo: response.notification.request.content.userInfo, identifier: response.notification.request.identifier)
+        }
     }
 
     #if targetEnvironment(macCatalyst)