4 files changed, 120 insertions, 1 deletions
diff --git a/python/vyos/configsession.py b/python/vyos/configsession.py
index 90842b749..ab7a631bb 100644
--- a/python/vyos/configsession.py
+++ b/python/vyos/configsession.py
@@ -176,6 +176,25 @@ class ConfigSession(object):
         except (ValueError, ConfigSessionError) as e:
             raise ConfigSessionError(e)
 
+    def set_section_tree(self, d: dict):
+        try:
+            if d:
+                for p in dict_to_paths(d):
+                    self.set(p)
+        except (ValueError, ConfigSessionError) as e:
+            raise ConfigSessionError(e)
+
+    def load_section_tree(self, mask: dict, d: dict):
+        try:
+            if mask:
+                for p in dict_to_paths(mask):
+                    self.delete(p)
+            if d:
+                for p in dict_to_paths(d):
+                    self.set(p)
+        except (ValueError, ConfigSessionError) as e:
+            raise ConfigSessionError(e)
+
     def comment(self, path, value=None):
         if not value:
             value = [""]
diff --git a/python/vyos/configtree.py b/python/vyos/configtree.py
index 423fe01ed..e4b282d72 100644
--- a/python/vyos/configtree.py
+++ b/python/vyos/configtree.py
@@ -401,6 +401,30 @@ def union(left, right, libpath=LIBPATH):
 
     return tree
 
+def mask_inclusive(left, right, libpath=LIBPATH):
+    if not (isinstance(left, ConfigTree) and isinstance(right, ConfigTree)):
+        raise TypeError("Arguments must be instances of ConfigTree")
+
+    try:
+        __lib = cdll.LoadLibrary(libpath)
+        __mask_tree = __lib.mask_tree
+        __mask_tree.argtypes = [c_void_p, c_void_p]
+        __mask_tree.restype = c_void_p
+        __get_error = __lib.get_error
+        __get_error.argtypes = []
+        __get_error.restype = c_char_p
+
+        res = __mask_tree(left._get_config(), right._get_config())
+    except Exception as e:
+        raise ConfigTreeError(e)
+    if not res:
+        msg = __get_error().decode()
+        raise ConfigTreeError(msg)
+
+    tree = ConfigTree(address=res)
+
+    return tree
+
 def reference_tree_to_json(from_dir, to_file, libpath=LIBPATH):
     try:
         __lib = cdll.LoadLibrary(libpath)
diff --git a/python/vyos/priority.py b/python/vyos/priority.py
new file mode 100644
index 000000000..ab4e6d411
--- /dev/null
+++ b/python/vyos/priority.py
@@ -0,0 +1,75 @@
+# Copyright 2024 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+from pathlib import Path
+from typing import List
+
+from vyos.xml_ref import load_reference
+from vyos.base import Warning as Warn
+
+def priority_data(d: dict) -> list:
+    def func(d, path, res, hier):
+        for k,v in d.items():
+            if not 'node_data' in v:
+                continue
+            subpath = path + [k]
+            hier_prio = hier
+            data = v.get('node_data')
+            o = data.get('owner')
+            p = data.get('priority')
+            # a few interface-definitions have priority preceding owner
+            # attribute, instead of within properties; pass in descent
+            if p is not None and o is None:
+                hier_prio = p
+            if o is not None and p is None:
+                p = hier_prio
+            if o is not None and p is not None:
+                o = Path(o.split()[0]).name
+                p = int(p)
+                res.append((subpath, o, p))
+            if isinstance(v, dict):
+                func(v, subpath, res, hier_prio)
+        return res
+    ret = func(d, [], [], 0)
+    ret = sorted(ret, key=lambda x: x[0])
+    ret = sorted(ret, key=lambda x: x[2])
+    return ret
+
+def get_priority_data() -> list:
+    xml = load_reference()
+    return priority_data(xml.ref)
+
+def priority_sort(sections: List[list[str]] = None,
+                  owners: List[str] = None,
+                  reverse=False) -> List:
+    if sections is not None:
+        index = 0
+        collection: List = sections
+    elif owners is not None:
+        index = 1
+        collection = owners
+    else:
+        raise ValueError('one of sections or owners is required')
+
+    l = get_priority_data()
+    m = [item for item in l if item[index] in collection]
+    n = sorted(m, key=lambda x: x[2], reverse=reverse)
+    o = [item[index] for item in n]
+    # sections are unhashable; use comprehension
+    missed = [j for j in collection if j not in o]
+    if missed:
+        Warn(f'No priority available for elements {missed}')
+
+    return o
diff --git a/python/vyos/xml_ref/generate_cache.py b/python/vyos/xml_ref/generate_cache.py
index 892c9defb..5f3f84dee 100755
--- a/python/vyos/xml_ref/generate_cache.py
+++ b/python/vyos/xml_ref/generate_cache.py
@@ -33,7 +33,8 @@ xml_tmp = join('/tmp', xml_cache_json)
 pkg_cache = abspath(join(_here, 'pkg_cache'))
 ref_cache = abspath(join(_here, 'cache.py'))
 
-node_data_fields = ("node_type", "multi", "valueless", "default_value")
+node_data_fields = ("node_type", "multi", "valueless", "default_value",
+                    "owner", "priority")
 
 def trim_node_data(cache: dict):
     for k in list(cache):