Extract common filtering logic.

Author: marekrogala

menu/menu.py

@@ -114,16 +114,15 @@ def process(c, request, name=None):
         if curitem is not None:
             curitem.selected = True
 
+        def filter_visible(items):
+            return [filter_visible_children(item) for item in items if item.visible]
+
         def filter_visible_children(item):
-            item.children = [filter_visible_children(child) for child in item.children if child.visible]
+            item.children = filter_visible(item.children)
             return item
 
         # return only visible items
-        visible = [
-            filter_visible_children(item)
-            for item in c.items[name]
-            if item.visible
-        ]
+        visible = filter_visible(c.items[name])
 
         # determine if we should apply 'selected' to parents when one of their
         # children is the 'selected' menu