# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import lxml.etree as ET
from typing import Collection, Dict

def add_value_from_tag(target : Dict, field_name: str, field_value : ET.Element, cast=None) -> None:
    if field_value is None or field_value.text is None: return
    field_value = field_value.text
    if cast is not None: field_value = cast(field_value)
    target[field_name] = field_value

def add_value_from_collection(target : Dict, field_name: str, field_value : Collection) -> None:
    if field_value is None or len(field_value) == 0: return
    target[field_name] = field_value
