add topic subscription func

AlphaWallet/AppDelegate.swift

@@ -13,6 +13,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UISplitViewControllerDele
     private let SNSPlatformApplicationArn = "arn:aws:sns:us-west-2:400248756644:app/APNS/AlphaWallet-iOS"
     private let SNSPlatformApplicationArnSANDBOX = "arn:aws:sns:us-west-2:400248756644:app/APNS_SANDBOX/AlphaWallet-testing"
     private let identityPoolId = "us-west-2:42f7f376-9a3f-412e-8c15-703b5d50b4e2"
+    private let SNSTopicEndpoint = "arn:aws:sns:us-west-2:400248756644:security"
     //This is separate coordinator for the protection of the sensitive information.
     private lazy var protectionCoordinator: ProtectionCoordinator = {
         return ProtectionCoordinator()
@@ -35,20 +36,6 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UISplitViewControllerDele
 
         return true
     }
-
-    private func cognitoRegistration()
-    {
-        // Override point for customization after application launch.
-        /// Setup AWS Cognito credentials
-        // Initialize the Amazon Cognito credentials provider
-//        let credentialsProvider = AWSCognitoCredentialsProvider(regionType: .USWest2,
-//                identityPoolId: identityPoolId)
-//        let configuration = AWSServiceConfiguration(region: .USWest2, credentialsProvider: credentialsProvider)
-//        AWSServiceManager.default().defaultServiceConfiguration = configuration
-//        let defaultServiceConfiguration = AWSServiceConfiguration(
-//                region: AWSRegionType.USWest2, credentialsProvider: credentialsProvider)
-//        AWSServiceManager.default().defaultServiceConfiguration = defaultServiceConfiguration
-    }
     
     func applicationWillResignActive(_ application: UIApplication) {
         protectionCoordinator.applicationWillResignActive()
@@ -123,12 +110,30 @@ class AppDelegate: UIResponder, UIApplicationDelegate, UISplitViewControllerDele
                 if let endpointArnForSNS = createEndpointResponse.endpointArn {
                     print("endpointArn: \(endpointArnForSNS)")
                     UserDefaults.standard.set(endpointArnForSNS, forKey: "endpointArnForSNS")
+                    //every user should subscribe to the security topic
+                    self.subscribeToSecurityTopicSNS(token: token)
                 }
             }
             return nil
         })
     }
 
+    func subscribeToSecurityTopicSNS(token: String) {
+        let sns = AWSSNS.default()
+        guard let endpointRequest = AWSSNSCreatePlatformEndpointInput() else { return }
+        endpointRequest.platformApplicationArn = SNSPlatformApplicationArn
+        endpointRequest.token = token
+
+        sns.createPlatformEndpoint(endpointRequest).continueWith() { task in
+            guard let response: AWSSNSCreateEndpointResponse = task.result else { return nil }
+            guard let subscribeRequest = AWSSNSSubscribeInput() else { return nil }
+            subscribeRequest.endpoint = response.endpointArn
+            subscribeRequest.protocols = "application"
+            subscribeRequest.topicArn = self.SNSTopicEndpoint
+            return sns.subscribe(subscribeRequest)
+        }
+    }
+
     //TODO Handle SNS errors
     func application(_ application: UIApplication,
                      didFailToRegisterForRemoteNotificationsWithError error: Error) {