Fix receiving multiple of the same authorisations at once causing us to delete prekeybundles for the user.

src/org/thoughtcrime/securesms/jobs/PushDecryptJob.java

@@ -282,14 +282,17 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
       if (content.lokiServiceMessage.isPresent()) {
         LokiServiceMessage lokiMessage = content.lokiServiceMessage.get();
         if (lokiMessage.getPreKeyBundleMessage() != null) {
-          Log.d("Loki", "Received a pre key bundle from: " + envelope.getSource() + ".");
           int registrationID = TextSecurePreferences.getLocalRegistrationId(context);
-          if (registrationID > 0) {
-            LokiPreKeyBundleDatabase lokiPreKeyBundleDatabase = DatabaseFactory.getLokiPreKeyBundleDatabase(context);
+          LokiPreKeyBundleDatabase lokiPreKeyBundleDatabase = DatabaseFactory.getLokiPreKeyBundleDatabase(context);
+
+          // Only store the pre key bundle if we don't have one in our database
+          if (registrationID > 0 && !lokiPreKeyBundleDatabase.hasPreKeyBundle(envelope.getSource())) {
+            Log.d("Loki", "Received a pre key bundle from: " + envelope.getSource() + ".");
             PreKeyBundle preKeyBundle = lokiMessage.getPreKeyBundleMessage().getPreKeyBundle(registrationID);
             lokiPreKeyBundleDatabase.setPreKeyBundle(envelope.getSource(), preKeyBundle);
           }
         }
+
         if (lokiMessage.getAddressMessage() != null) {
           // TODO: Loki - Handle address message
         }
@@ -1064,9 +1067,6 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
     DeviceLinkingSession linkingSession = DeviceLinkingSession.Companion.getShared();
     if (isValid && linkingSession.isListeningForLinkingRequests()) {
       linkingSession.processLinkingRequest(authorisation);
-    } else {
-      // Remove pre key bundle from the user
-      DatabaseFactory.getLokiPreKeyBundleDatabase(context).removePreKeyBundle(envelope.getSource());
     }
   }
 

src/org/thoughtcrime/securesms/loki/LokiPreKeyBundleDatabase.kt

@@ -89,4 +89,10 @@ class LokiPreKeyBundleDatabase(context: Context, helper: SQLCipherOpenHelper) :
         val database = databaseHelper.writableDatabase
         database.delete(tableName, "${Companion.hexEncodedPublicKey} = ?", arrayOf( hexEncodedPublicKey ))
     }
+
+    fun hasPreKeyBundle(hexEncodedPublicKey: String): Boolean {
+        val database = databaseHelper.readableDatabase
+        val cursor = database.query(tableName, null, "${Companion.hexEncodedPublicKey} = ?", arrayOf(hexEncodedPublicKey), null, null, null)
+        return cursor != null && cursor.count > 0
+    }
 }