1 files changed, 74 insertions, 0 deletions
diff --git a/python/vyos/configsource.py b/python/vyos/configsource.py
index 6c121a202..e4ced6305 100644
--- a/python/vyos/configsource.py
+++ b/python/vyos/configsource.py
@@ -17,12 +17,16 @@
 import os
 import re
 import subprocess
+from typing import Union
 
 from vyos.configtree import ConfigTree
 from vyos.utils.boot import boot_configuration_complete
 from vyos.vyconf_session import VyconfSession
 from vyos.vyconf_session import VyconfSessionError
 from vyos.defaults import directories
+from vyos.xml_ref import is_tag
+from vyos.xml_ref import is_leaf
+from vyos.xml_ref import is_multi
 
 class VyOSError(Exception):
     """
@@ -341,6 +345,76 @@ class ConfigSourceVyconfSession(ConfigSource):
         self._running_config = ConfigTree(internal=self.running_cache_path)
         self._session_config = ConfigTree(internal=self.session_cache_path)
 
+        # N.B. level not yet implemented pending integration with legacy CLI
+        # cf. T7374
+        self._level = []
+
+    def get_level(self):
+        return self._level
+
+    def set_level(self):
+        pass
+
+    def session_changed(self):
+        """
+        Returns:
+            True if the config session has uncommited changes, False otherwise.
+        """
+        try:
+            return self._vyconf_session.session_changed()
+        except VyconfSessionError:
+            # no actionable session info on error
+            return False
+
+    def in_session(self):
+        """
+        Returns:
+            True if called from a configuration session, False otherwise.
+        """
+        return self._vyconf_session.in_session()
+
+    def show_config(self, path: Union[str,list] = None, default: str = None,
+                    effective: bool = False):
+        """
+        Args:
+            path (str|list): Configuration tree path, or empty
+            default (str): Default value to return
+
+        Returns:
+            str: working configuration
+        """
+
+        if path is None:
+            path = []
+        if isinstance(path, str):
+            path = path.split()
+
+        ct = self._running_config if effective else self._session_config
+        with_node = True if self.is_tag(path) else False
+        ct_at_path = ct.get_subtree(path, with_node=with_node) if path else ct
+
+        res = ct_at_path.to_string().strip()
+
+        return res if res else default
+
+    def is_tag(self, path):
+        try:
+            return is_tag(path)
+        except ValueError:
+            return False
+
+    def is_leaf(self, path):
+        try:
+            return is_leaf(path)
+        except ValueError:
+            return False
+
+    def is_multi(self, path):
+        try:
+            return is_multi(path)
+        except ValueError:
+            return False
+
 class ConfigSourceString(ConfigSource):
     def __init__(self, running_config_text=None, session_config_text=None):
         super().__init__()