server/AyaNova/util/FileUtil.cs

@@ -522,6 +522,34 @@ namespace AyaNova.Util
             return File.Exists(GetPermanentAttachmentFilePath(fileName));
 
         }
+
+        internal static bool AppearsToBeAnOrphanedAttachment(string fullPathName)
+        {
+            // 		is it in the correct folder which is named based on it's hash?
+            // 		Is it X characters long (they all are or not?) Not sure though actually, maybe they are all 64 characters, maybe not
+            // 		Does it have an extension?  None of ours have an extension
+
+
+            if (Path.HasExtension(fullPathName)) return false;
+            var FileName = Path.GetFileName(fullPathName);
+            //2339371F6C0C88656888163072635B282BB7FFF7B33771AB2295C868A0FECD34
+            //3D67D4D258DCC7BB3CB560013C737E9865DFFB324C2012AA7E9E75CCCBE4133C
+            //BA7816BF8F01CFEA414140DE5DAE2223B00361A396177A9CB410FF61F20015AD
+            //40CE02D157C845E42AA4EF7DCC93A74B0179649C8D0A806B2F985D34AA7385CE
+            //9F2BA2DF87889B1E71346CC575A6F57334B441DB5AE4D40814F95E232C9539B5
+            //got to be at least 32 chars
+            if (FileName.Length < 32) return false;
+            //probably all 64 chars but let's not count on that and go with folder is correct 
+            
+            //what *should* the path be for a file of this name?
+            var ExpectedFullPath=GetPermanentAttachmentFilePath(FileName);
+            //if expected equals real then it's very likely an orphaned file
+            return fullPathName==ExpectedFullPath;
+           
+
+        }
+
+
         #endregion attachment stuff
 
         #region General utilities