completion: T2238: use interface data

Use the data in the default dict of the interface to generate
the output of list interface.

1 files changed, 21 insertions, 2 deletions

diff --git a/python/vyos/ifconfig/section.py b/python/vyos/ifconfig/section.py
index 4f76258a7..234c9a6cc 100644
--- a/python/vyos/ifconfig/section.py
+++ b/python/vyos/ifconfig/section.py
@@ -19,6 +19,7 @@ import netifaces
 class Section:
     # the known interface prefixes
     _prefixes = {}
+    _classes = []
 
     # class need to define: definition['prefixes']
     # the interface prefixes declared by a class used to name interface with
@@ -34,6 +35,8 @@ class Section:
         if not klass.definition.get('prefixes',[]):
             raise RuntimeError(f'valid interface prefixes not defined for {klass.__name__}')
 
+        cls._classes.append(klass)
+
         for ifprefix in klass.definition['prefixes']:
             if ifprefix in cls._prefixes:
                 raise RuntimeError(f'only one class can be registered for prefix "{ifprefix}" type')
@@ -110,6 +113,22 @@ class Section:
         """
         return list(cls._intf_under_section(section))
 
+    @classmethod
+    def _intf_with_feature(cls, feature=''):
+        """
+        return a generator with the name of the interface which have 
+        a particular feature set in their definition such as:
+        bondable, broadcast, bridgeable, ...
+        """
+        for klass in cls._classes:
+            if klass.definition[feature]:
+                yield klass.definition['section']
 
-# XXX: TODO - limit name for VRF interfaces
-
+    @classmethod
+    def feature(cls, feature=''):
+        """
+        return list with the name of the interface which have 
+        a particular feature set in their definition such as:
+        bondable, broadcast, bridgeable, ...
+        """
+        return list(cls._intf_with_feature(feature))