add logs & fix PN

Session/Shared/BaseVC.swift

@@ -106,6 +106,9 @@ class BaseVC : UIViewController {
     }
 
     override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
+        if #available(iOS 13.0, *) {
+            SNLog("Current trait collection: \(UITraitCollection.current), previous trait collection: \(previousTraitCollection)")
+        }
         if LKAppModeUtilities.isSystemDefault {
              NotificationCenter.default.post(name: .appModeChanged, object: nil)
         }

SessionMessagingKit/Sending & Receiving/Pollers/OpenGroupPollerV2.swift

@@ -48,6 +48,7 @@ public final class OpenGroupPollerV2 : NSObject {
                 guard let self = self else { return }
                 self.isPolling = false
                 bodies.forEach { self.handleCompactPollBody($0, isBackgroundPoll: isBackgroundPoll) }
+                SNLog("Open group polling finished for \(self.server).")
                 seal.fulfill(())
             }.catch(on: OpenGroupAPIV2.workQueue) { error in
                 SNLog("Open group polling failed due to error: \(error).")

SessionNotificationServiceExtension/NSENotificationPresenter.swift

@@ -13,14 +13,14 @@ public class NSENotificationPresenter: NSObject, NotificationsProtocol {
         // to check if this is the only message request thread (group threads can't be message requests
         // so just ignore those and if the user has hidden message requests then we want to show the
         // notification regardless of how many message requests there are)
-        if !thread.isGroupThread() && thread.isMessageRequest() && !CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] {
+        if !thread.isGroupThread() && thread.isMessageRequest(using: transaction) && !CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] {
             let threads = transaction.ext(TSThreadDatabaseViewExtensionName) as! YapDatabaseViewTransaction
             let numMessageRequests = threads.numberOfItems(inGroup: TSMessageRequestGroup)
             
             // Allow this to show a notification if there are no message requests (ie. this is the first one)
             guard numMessageRequests == 0 else { return }
         }
-        else if thread.isMessageRequest() && CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] {
+        else if thread.isMessageRequest(using: transaction) && CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] {
             // If there are other interactions on this thread already then don't show the notification
             if thread.numberOfInteractions(with: transaction) > 1 { return }
             
@@ -37,7 +37,7 @@ public class NSENotificationPresenter: NSObject, NotificationsProtocol {
         }
         
         let context = Contact.context(for: thread)
-        let senderName = Storage.shared.getContact(with: senderPublicKey)?.displayName(for: context) ?? senderPublicKey
+        let senderName = Storage.shared.getContact(with: senderPublicKey, using: transaction)?.displayName(for: context) ?? senderPublicKey
         
         var notificationTitle = senderName
         if let group = thread as? TSGroupThread {
@@ -85,7 +85,7 @@ public class NSENotificationPresenter: NSObject, NotificationsProtocol {
         
         // If it's a message request then overwrite the body to be something generic (only show a notification
         // when receiving a new message request if there aren't any others or the user had hidden them)
-        if thread.isMessageRequest() {
+        if thread.isMessageRequest(using: transaction) {
             notificationContent.title = "Session"
             notificationContent.body = "MESSAGE_REQUESTS_NOTIFICATION".localized()
         }
@@ -93,8 +93,16 @@ public class NSENotificationPresenter: NSObject, NotificationsProtocol {
         // Add request
         let identifier = incomingMessage.notificationIdentifier ?? UUID().uuidString
         let request = UNNotificationRequest(identifier: identifier, content: notificationContent, trigger: nil)
-        SNLog("Add remote notification request")
+        SNLog("Add remote notification request: \(notificationContent.body)")
-        UNUserNotificationCenter.current().add(request)
+        let semaphore = DispatchSemaphore(value: 0)
+        UNUserNotificationCenter.current().add(request) { error in
+            if let error = error {
+                SNLog("Failed to add notification request due to error:\(error)")
+            }
+            semaphore.signal()
+        }
+        semaphore.wait()
+        SNLog("Finish adding remote notification request")
     }
     
     public func cancelNotification(_ identifier: String) {

SessionNotificationServiceExtension/NotificationServiceExtension.swift

@@ -41,7 +41,10 @@ public final class NotificationServiceExtension : UNNotificationServiceExtension
                 let envelope = try? MessageWrapper.unwrap(data: data), let envelopeAsData = try? envelope.serializedData() else {
                 return self.handleFailure(for: notificationContent)
             }
-            Storage.write { transaction in // Intentionally capture self
+            // HACK: It is important to use writeSync() here to avoid a race condition
+            // where the completeSilenty() is called before the local notification request
+            // is added to notification center.
+            Storage.writeSync { transaction in // Intentionally capture self
                 do {
                     let (message, proto) = try MessageReceiver.parse(envelopeAsData, openGroupMessageServerID: nil, using: transaction)
                     switch message {