mpd: Add support for VFS in add-commands

mopidy/mpd/protocol/current_playlist.py

@@ -22,10 +22,32 @@ def add(context, uri):
     """
     if not uri:
         return
+
     tl_tracks = context.core.tracklist.add(uri=uri).get()
-    if not tl_tracks:
+    if tl_tracks:
+        return
+
+    if not uri.startswith('/'):
+        uri = '/%s' % uri
+
+    browse_futures = [context.core.library.browse(uri)]
+    lookup_futures = []
+    while browse_futures:
+        for ref in browse_futures.pop().get():
+            if ref.type == ref.DIRECTORY:
+                browse_futures.append(context.core.library.browse(ref.uri))
+            else:
+                lookup_futures.append(context.core.library.lookup(ref.uri))
+
+    tracks = []
+    for future in lookup_futures:
+        tracks.extend(future.get())
+
+    if not tracks:
         raise MpdNoExistError('directory or file not found', command='add')
 
+    context.core.tracklist.add(tracks=tracks)
+
 
 @handle_request(r'addid\ "(?P<uri>[^"]*)"(\ "(?P<songpos>\d+)")*$')
 def addid(context, uri, songpos=None):