Example of handling notifications using the clean architecture

[Pavel Sorokin]

Would be nice to see an example of how to handle notifications, especially the silent ones that would trigger some data fetch/update.

Seeing as notifications are handled in AppDelegate callback, how would one go around hooking the logic from, say, Interactors.

So far, I see that it's possible to handle non-silent notifications in scene delegate like this:

class SceneDelegate: UIResponder, UIWindowSceneDelegate {
  func scene(
    _ scene: UIScene,
    willConnectTo session: UISceneSession,
    options connectionOptions: UIScene.ConnectionOptions
  ) {
    if let windowScene = scene as? UIWindowScene {
      let window = UIWindow(windowScene: windowScene)
      let environment = AppEnvironment.bootstrap(window: window)


      // This is UNNotificationResponse
      if let notificationResponse = connectionOptions.notificationResponse {
        window.makeKeyAndVisible()

        // do something with environment.container.interactors

        return
      }

      window.makeKeyAndVisible()
    }
  }
}

And for silent notifications:

func application(
  _ application: UIApplication,
  didReceiveRemoteNotification userInfo: [AnyHashable: Any],
  fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> ()
) {
  if let sceneDelegate = application.connectedScenes.first?.delegate as? SceneDelegate {
    sceneDelegate.handleSilentNotification(userInfo)
    completionHandler(.newData)
  }

  completionHandler(.noData)
}

Now that Xcode 11.4 allows to test notifications even on a simulator, it would be great to see the notification handling introduced to the example Clean SwiftUI Architecture app.

[Alexey Naumov]

That's a good idea, I'll add these! Stay tuned!

[Alexey Naumov]

@NeverwinterMoon , I've added handling of silent notifications and the notifications with a deep link. The project now contains a test .apns notification payload you can drag & drop onto the Simulator. Thank you for suggesting this!

[Pavel Sorokin]

@nalexn This is amazing! Thanks a lot for a quick response time and great work. This is definitely cleaner than my own implementation. Will try to find time today to check out how I can improve my code based on your work.