Check intermediate paths in OnRenamed for null

It appears that Pri.LongPath.GetDirectoryName or Pri.LongPath.GetFileName
can sometimes return null. I'm not sure why... But let's not crash
in this case

Relates to #112

src/SyncTrayzor/Services/DirectoryWatcher.cs

@@ -138,7 +138,25 @@ private void OnRenamed(object source, RenamedEventArgs e)
             // So, construct it from e.FullPath and e.OldName
             // Note that we're using Pri.LongPath to get a Path.GetDirectoryName implementation that can handle
             // long paths
-            var oldFullPath = Path.Combine(Path.GetDirectoryName(e.FullPath), Path.GetFileName(e.OldName));
+
+            // Apparently Path.GetDirectoryName(e.FullPath) or Path.GetFileName(e.OldName) can return null, see #112
+            // Not sure why this might be, but let's work around it...
+            var oldFullPathDirectory = Path.GetDirectoryName(e.FullPath);
+            var oldFileName = Path.GetFileName(e.OldName);
+
+            if (oldFullPathDirectory == null)
+            {
+                logger.Warn("OldFullPathDirectory is null. Not sure why... e.FullPath: {0}", e.FullPath);
+                return;
+            }
+
+            if (oldFileName == null)
+            {
+                logger.Warn("OldFileName is null. Not sure why... e.OldName: {0}", e.OldName);
+                return;
+            }
+
+            var oldFullPath = Path.Combine(oldFullPathDirectory, oldFileName);
 
             this.PathChanged(oldFullPath, fileExists: false);
         }

src/SyncTrayzor/SyncThing/ApiClient/LocalIndexUpdatedEvent.cs

@@ -9,20 +9,14 @@ namespace SyncTrayzor.SyncThing.ApiClient
 {
     public class LocalIndexUpdatedEventData
     {
-        [JsonProperty("flags")]
-        public string Flags { get; set; }
-
-        [JsonProperty("modified")]
-        public DateTime Modified { get; set; }
-
-        [JsonProperty("name")]
-        public string Name { get; set; }
-
         [JsonProperty("folder")]
         public string Folder { get; set; }
 
-        [JsonProperty("size")]
-        public long Size { get; set; }
+        [JsonProperty("items")]
+        public int Items { get; set; }
+
+        [JsonProperty("version")]
+        public long Version { get; set; }
     }
 
     public class LocalIndexUpdatedEvent : Event
@@ -37,7 +31,7 @@ public override void Visit(IEventVisitor visitor)
 
         public override string ToString()
         {
-            return String.Format("<LocalIndexUpdated ID={0} Time={1} Flags={2} Modified={3} Name={4} Folder={5} Size={6}>", this.Id, this.Time, this.Data.Flags, this.Data.Modified, this.Data.Name, this.Data.Folder, this.Data.Size);
+            return String.Format("<LocalIndexUpdated ID={0} Time={1} Folder={2} Items={3} Version={4}>", this.Id, this.Time, this.Data.Folder, this.Data.Items, this.Data.Version);
         }
     }
 }

src/SyncTrayzor/SyncThing/ApiClient/StartupCompleteEvent.cs

@@ -1,4 +1,5 @@
-using System;
+using Newtonsoft.Json;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
@@ -8,6 +9,9 @@ namespace SyncTrayzor.SyncThing.ApiClient
 {
     public class StartupCompleteEvent : Event
     {
+        [JsonProperty("myID")]
+        public string MyID { get; set; }
+
         public override void Visit(IEventVisitor visitor)
         {
             visitor.Accept(this);