basic bits of new file list sharing system

libretroshare/src/file_sharing/directory_updater.h

@@ -0,0 +1,25 @@
+// This class crawls the given directry hierarchy and updates it. It does so by calling the
+// shared file list source. This source may be of two types:
+// 	- local: directories are crawled n disk and files are hashed / requested from a cache
+// 	- remote: directories are requested remotely to a providing client
+//
+class DirectoryUpdater
+{
+	public:
+		DirectoryUpdater() ;
+
+		// Does some updating job. Crawls the existing directories and checks wether it has been updated
+		// recently enough. If not, calls the directry source.
+		//
+		void tick() ;
+
+		// 
+};
+
+class LocalDirectoryUpdater: public DirectoryUpdater
+{
+};
+
+class RemoteDirectoryUpdater: public DirectoryUpdater
+{
+};