Fixes to stream position.

backend/src/Squidex.Infrastructure.Azure/EventSourcing/StreamPosition.cs

@@ -15,6 +15,8 @@ namespace Squidex.Infrastructure.EventSourcing
         private static readonly ObjectPool<StringBuilder> StringBuilderPool =
             new DefaultObjectPool<StringBuilder>(new StringBuilderPooledObjectPolicy());
 
+        public static readonly StreamPosition Empty = new StreamPosition();
+
         public long Timestamp { get; }
 
         public long CommitOffset { get; }
@@ -59,13 +61,16 @@ namespace Squidex.Infrastructure.EventSourcing
             {
                 var parts = position.Split('-');
 
+                if (parts.Length == 3)
+                {
                     return new StreamPosition(
                     long.Parse(parts[0]),
                     long.Parse(parts[1]),
                     long.Parse(parts[2]));
                 }
+            }
 
-            return new StreamPosition(0, -1, -1);
+            return Empty;
         }
     }
 }

backend/src/Squidex.Infrastructure.MongoDb/EventSourcing/StreamPosition.cs

@@ -16,7 +16,9 @@ namespace Squidex.Infrastructure.EventSourcing
         private static readonly ObjectPool<StringBuilder> StringBuilderPool =
             new DefaultObjectPool<StringBuilder>(new StringBuilderPooledObjectPolicy());
 
-        private static readonly BsonTimestamp EmptyTimestamp = new BsonTimestamp(946681200, 0);
+        private static readonly BsonTimestamp EmptyTimestamp = new BsonTimestamp(0, 0);
+
+        public static readonly StreamPosition Empty = new StreamPosition(EmptyTimestamp, -1, -1);
 
         public BsonTimestamp Timestamp { get; }
 
@@ -64,13 +66,16 @@ namespace Squidex.Infrastructure.EventSourcing
             {
                 var parts = position.Split('-');
 
+                if (parts.Length == 4)
+                {
                     return new StreamPosition(
                         new BsonTimestamp(int.Parse(parts[0]), int.Parse(parts[1])),
                         long.Parse(parts[2]),
                         long.Parse(parts[3]));
                 }
+            }
 
-            return new StreamPosition(EmptyTimestamp, -1, -1);
+            return Empty;
         }
     }
 }