xml: T6650: add initial op-mode cache support

4 files changed, 250 insertions, 1 deletions

diff --git a/python/vyos/defaults.py b/python/vyos/defaults.py
index 25ee45391..dec619d3e 100644
--- a/python/vyos/defaults.py
+++ b/python/vyos/defaults.py
@@ -35,7 +35,8 @@ directories = {
   'vyos_udev_dir' : '/run/udev/vyos',
   'isc_dhclient_dir' : '/run/dhclient',
   'dhcp6_client_dir' : '/run/dhcp6c',
-  'vyos_configdir' : '/opt/vyatta/config'
+  'vyos_configdir' : '/opt/vyatta/config',
+  'completion_dir' : f'{base_dir}/completion'
 }
 
 config_status = '/tmp/vyos-config-status'
diff --git a/python/vyos/xml_ref/__init__.py b/python/vyos/xml_ref/__init__.py
index 2ba3da4e8..91ce394f7 100644
--- a/python/vyos/xml_ref/__init__.py
+++ b/python/vyos/xml_ref/__init__.py
@@ -15,6 +15,7 @@
 
 from typing import Optional, Union, TYPE_CHECKING
 from vyos.xml_ref import definition
+from vyos.xml_ref import op_definition
 
 if TYPE_CHECKING:
     from vyos.config import ConfigDict
@@ -87,3 +88,25 @@ def from_source(d: dict, path: list) -> bool:
 
 def ext_dict_merge(source: dict, destination: Union[dict, 'ConfigDict']):
     return definition.ext_dict_merge(source, destination)
+
+def load_op_reference(op_cache=[]):
+    if op_cache:
+        return op_cache[0]
+
+    op_xml = op_definition.OpXml()
+
+    try:
+        from vyos.xml_ref.op_cache import op_reference
+    except Exception:
+        raise ImportError('no xml op reference cache !!')
+
+    if not op_reference:
+        raise ValueError('empty xml op reference cache !!')
+
+    op_xml.define(op_reference)
+    op_cache.append(op_xml)
+
+    return op_xml
+
+def get_op_ref_path(path: list) -> list[op_definition.PathData]:
+    return load_op_reference()._get_op_ref_path(path)
diff --git a/python/vyos/xml_ref/generate_op_cache.py b/python/vyos/xml_ref/generate_op_cache.py
new file mode 100755
index 000000000..e93b07974
--- /dev/null
+++ b/python/vyos/xml_ref/generate_op_cache.py
@@ -0,0 +1,176 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2024 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+#
+
+import re
+import sys
+import json
+import glob
+from argparse import ArgumentParser
+from argparse import ArgumentTypeError
+from os.path import join
+from os.path import abspath
+from os.path import dirname
+from xml.etree import ElementTree as ET
+from xml.etree.ElementTree import Element
+from typing import TypeAlias
+from typing import Optional
+
+_here = dirname(__file__)
+
+sys.path.append(join(_here, '..'))
+from defaults import directories
+
+from op_definition import NodeData
+from op_definition import PathData
+
+xml_op_cache_json = 'xml_op_cache.json'
+xml_op_tmp = join('/tmp', xml_op_cache_json)
+op_ref_cache = abspath(join(_here, 'op_cache.py'))
+
+OptElement: TypeAlias = Optional[Element]
+DEBUG = False
+
+
+def translate_exec(s: str) -> str:
+    s = s.replace('${vyos_op_scripts_dir}', directories['op_mode'])
+    s = s.replace('${vyos_libexec_dir}', directories['base'])
+    return s
+
+
+def translate_position(s: str, pos: list[str]) -> str:
+    pos = pos.copy()
+    pat: re.Pattern = re.compile(r'(?:\")?\${?([0-9]+)}?(?:\")?')
+    t: str = pat.sub(r'_place_holder_\1_', s)
+
+    # preferred to .format(*list) to avoid collisions with braces
+    for i, p in enumerate(pos):
+        t = t.replace(f'_place_holder_{i+1}_', p)
+
+    return t
+
+
+def translate_command(s: str, pos: list[str]) -> str:
+    s = translate_exec(s)
+    s = translate_position(s, pos)
+    return s
+
+
+def translate_op_script(s: str) -> str:
+    s = s.replace('${vyos_completion_dir}', directories['completion_dir'])
+    s = s.replace('${vyos_op_scripts_dir}', directories['op_mode'])
+    return s
+
+
+def insert_node(n: Element, l: list[PathData], path = None) -> None:
+    # pylint: disable=too-many-locals,too-many-branches
+    prop: OptElement = n.find('properties')
+    children: OptElement = n.find('children')
+    command: OptElement = n.find('command')
+    # name is not None as required by schema
+    name: str = n.get('name', 'schema_error')
+    node_type: str = n.tag
+    if path is None:
+        path = []
+
+    path.append(name)
+    if node_type == 'tagNode':
+        path.append(f'{name}-tag_value')
+
+    help_prop: OptElement = None if prop is None else prop.find('help')
+    help_text = None if help_prop is None else help_prop.text
+    command_text = None if command is None else command.text
+    if command_text is not None:
+        command_text = translate_command(command_text, path)
+
+    comp_help = None
+    if prop is not None:
+        che = prop.findall("completionHelp")
+        for c in che:
+            lists = c.findall("list")
+            paths = c.findall("path")
+            scripts = c.findall("script")
+
+            comp_help = {}
+            list_l = []
+            for i in lists:
+                list_l.append(i.text)
+            path_l = []
+            for i in paths:
+                path_str = re.sub(r'\s+', '/', i.text)
+                path_l.append(path_str)
+            script_l = []
+            for i in scripts:
+                script_str = translate_op_script(i.text)
+                script_l.append(script_str)
+
+            comp_help['list'] = list_l
+            comp_help['fs_path'] = path_l
+            comp_help['script'] = script_l
+
+    for d in l:
+        if name in list(d):
+            break
+    else:
+        d = {}
+        l.append(d)
+
+    inner_l = d.setdefault(name, [])
+
+    inner_d: PathData = {'node_data': NodeData(node_type=node_type,
+                                               help_text=help_text,
+                                               comp_help=comp_help,
+                                               command=command_text,
+                                               path=path)}
+    inner_l.append(inner_d)
+
+    if children is not None:
+        inner_nodes = children.iterfind("*")
+        for inner_n in inner_nodes:
+            inner_path = path[:]
+            insert_node(inner_n, inner_l, inner_path)
+
+
+def parse_file(file_path, l):
+    tree = ET.parse(file_path)
+    root = tree.getroot()
+    for n in root.iterfind("*"):
+        insert_node(n, l)
+
+
+def main():
+    parser = ArgumentParser(description='generate dict from xml defintions')
+    parser.add_argument('--xml-dir', type=str, required=True,
+                        help='transcluded xml op-mode-definition file')
+
+    args = vars(parser.parse_args())
+
+    xml_dir = abspath(args['xml_dir'])
+
+    l = []
+
+    for fname in glob.glob(f'{xml_dir}/*.xml'):
+        parse_file(fname, l)
+
+    with open(xml_op_tmp, 'w') as f:
+        json.dump(l, f, indent=2)
+
+    with open(op_ref_cache, 'w') as f:
+        f.write(f'op_reference = {str(l)}')
+
+if __name__ == '__main__':
+    main()
diff --git a/python/vyos/xml_ref/op_definition.py b/python/vyos/xml_ref/op_definition.py
new file mode 100644
index 000000000..914f3a105
--- /dev/null
+++ b/python/vyos/xml_ref/op_definition.py
@@ -0,0 +1,49 @@
+# 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 typing import TypedDict
+from typing import TypeAlias
+from typing import Optional
+from typing import Union
+
+
+class NodeData(TypedDict):
+    node_type: Optional[str]
+    help_text: Optional[str]
+    comp_help: Optional[dict[str, list]]
+    command: Optional[str]
+    path: Optional[list[str]]
+
+
+PathData: TypeAlias = dict[str, Union[NodeData|list['PathData']]]
+
+
+class OpXml:
+    def __init__(self):
+        self.op_ref = {}
+
+    def define(self, op_ref: list[PathData]) -> None:
+        self.op_ref = op_ref
+
+    def _get_op_ref_path(self, path: list[str]) -> list[PathData]:
+        def _get_path_list(path: list[str], l: list[PathData]) -> list[PathData]:
+            if not path:
+                return l
+            for d in l:
+                if path[0] in list(d):
+                    return _get_path_list(path[1:], d[path[0]])
+            return []
+        l = self.op_ref
+        return _get_path_list(path, l)