Two sync loop experimental solution to decrypt push notifications (#1082)

* Experimental two sync loop solution

* better logging

* improved the code and handled invite notifications display better

* improved invite notifications

* new exerimental branch

* new sync loop

* code updated

* code improvements

* code improvements

* fix typo

* code improvements

* removed some unused code and added a respawn

* fixing some NSE issues

* code improvements

* new version of the branch

* more logging

* running the nse process ONLY IF necessary

* finally works! made also the feature flag

* also the encryption value of the room list api will depend on the flag now

* changelog

* code improvements

* code improvement

* updated proj

* fixing some compilation error after the rebase

* opt-in for the encryption sync

* fix

ElementX/Sources/Application/AppCoordinator.swift

@@ -563,6 +563,16 @@ class AppCoordinator: AppCoordinatorProtocol, AuthenticationCoordinatorDelegate,
                                                selector: #selector(applicationDidBecomeActive),
                                                name: UIApplication.didBecomeActiveNotification,
                                                object: nil)
+
+        NotificationCenter.default.addObserver(self,
+                                               selector: #selector(applicationWillTerminate),
+                                               name: UIApplication.willTerminateNotification,
+                                               object: nil)
+    }
+
+    @objc
+    private func applicationWillTerminate() {
+        userSession?.clientProxy.stopSync()
     }
 
     @objc

ElementX/Sources/Application/AppSettings.swift

@@ -163,9 +163,9 @@ final class AppSettings {
     @UserPreference(key: UserDefaultsKeys.pusherProfileTag, storageType: .userDefaults(store))
     var pusherProfileTag: String?
 
-    /// A set of all the notification identifiers that have been served so far, it's reset every time the app is launched
-    @UserPreference(key: SharedUserDefaultsKeys.servedNotificationIdentifiers, initialValue: [], storageType: .userDefaults(store))
-    var servedNotificationIdentifiers: Set<String>
+    /// Tag describing if the app and the NSE should use the encryption sync
+    @UserPreference(key: SharedUserDefaultsKeys.isEncryptionSyncEnabled, defaultValue: false, storageType: .userDefaults(store))
+    var isEncryptionSyncEnabled
         
     // MARK: - Other