make internal attachment stuff private

Author: Trolldemorted

Signal-Windows.Lib/SignalLibHandle.cs

@@ -289,16 +289,6 @@ public void RetrieveAttachment(SignalServiceAttachmentPointer pointer, Stream do
         {
             MessageReceiver.retrieveAttachment(pointer, downloadStream, tempStream, 0);
         }
-
-        public string RetrieveAttachmentUrl(SignalServiceAttachmentPointer pointer)
-        {
-            return MessageReceiver.RetrieveAttachmentDownloadUrl(pointer);
-        }
-
-        public void DecryptAttachment(SignalServiceAttachmentPointer pointer, Stream tempStream, Stream downloadStream)
-        {
-            MessageReceiver.DecryptAttachment(pointer, tempStream, downloadStream);
-        }
         #endregion
 
         #region attachment api
@@ -549,6 +539,16 @@ private async Task HandleSuccessfullDownload(SignalAttachment attachment, IStora
             }
         }
 
+        private string RetrieveAttachmentUrl(SignalServiceAttachmentPointer pointer)
+        {
+            return MessageReceiver.RetrieveAttachmentDownloadUrl(pointer);
+        }
+
+        private void DecryptAttachment(SignalServiceAttachmentPointer pointer, Stream tempStream, Stream downloadStream)
+        {
+            MessageReceiver.DecryptAttachment(pointer, tempStream, downloadStream);
+        }
+
         private async Task RecoverDownloads()
         {
             var downloads = await BackgroundDownloader.GetCurrentDownloadsAsync();