Store the raw dn managed config to be consumed by nebula later (#127)

ios/NebulaNetworkExtension/Site.swift

@@ -135,6 +135,7 @@ class Site: Codable {
     var managed: Bool
     // The following fields are present if managed = true
     var lastManagedUpdate: String?
+    var rawConfig: String?
 
     /// If true then this site needs to be migrated to the filesystem. Should be handled by the initiator of the site
     var needsToMigrateToFS: Bool = false
@@ -255,6 +256,7 @@ class Site: Codable {
         mtu = incoming.mtu ?? 1300
         managed = incoming.managed ?? false
         lastManagedUpdate = incoming.lastManagedUpdate
+        rawConfig = incoming.rawConfig
 
         if (managed && (try? getDNCredentials())?.invalid != false) {
             errors.append("Unable to fetch managed updates - please re-enroll the device")
@@ -344,6 +346,7 @@ class Site: Codable {
         case mtu
         case managed
         case lastManagedUpdate
+        case rawConfig
     }
 }
 
@@ -405,6 +408,7 @@ struct IncomingSite: Codable {
     // The following fields are present if managed = true
     var dnCredentials: DNCredentials?
     var lastManagedUpdate: String?
+    var rawConfig: String?
 
     func getConfig() throws -> Data {
         let encoder = JSONEncoder()

ios/Runner/Sites.swift

@@ -125,7 +125,14 @@ class SiteUpdater: NSObject, FlutterStreamHandler {
     /// onListen is called when flutter code attaches an event listener
     func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
         eventSink = events;
+        
 #if !targetEnvironment(simulator)
+        if site.manager == nil {
+            //TODO: The dn updater path seems to race to build a site that lacks a manager. The UI does not display this error
+            // and a another listen should occur and succeed.
+            return FlutterError(code: "Internal Error", message: "Flutter manager was not present", details: nil)
+        }
+        
         self.notification = NotificationCenter.default.addObserver(forName: NSNotification.Name.NEVPNStatusDidChange, object: site.manager!.connection , queue: nil) { n in
             let connected = self.site.connected
             self.site.status = statusString[self.site.manager!.connection.status]