# Copyright (C) 2011 Google Inc.
#
# 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.

from . import extension_util
import transitfeed


class Agency(transitfeed.Agency):
    """Extension of transitfeed.Agency:
    - Overriding validate_agency_lang() for supporting BCP-47 agency_lang codes.
    """

    # Overrides transitfeed.Agency.validate_agency_lang() and validates agency_lang
    # using the new pybcp47 module via extension_util.py
    def validate_agency_lang(self, problems):
        if not self.agency_lang:
            return False
        return not extension_util.validate_language_code(
            self.agency_lang, 'agency_lang', problems)
