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# Copyright (C) 2017 Jan Jancar
#
# This file is a part of the Mailman PGP plugin.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# 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/>.
"""Config validation and transforms."""
import builtins
import re
from configparser import ConfigParser
from mailman.utilities.modules import find_name
class ConfigValidator:
"""Validates a ConfigParser object against a schema."""
def __init__(self, schema):
self.schema = ConfigParser()
self.schema.read_string(schema)
def validate(self, cfg):
"""
:param cfg:
:type cfg: ConfigParser
"""
for section in self.schema.sections():
assert cfg.has_section(section)
for option in self.schema.options(section):
assert cfg.has_option(section, option)
self._check_option(cfg.get(section, option),
self.schema.get(section, option))
def _check_option(self, value, schema):
call = None
try:
call = getattr(builtins, schema)
except:
try:
call = find_name(schema)
except:
try:
def call(value):
match = re.search(schema, value)
if match is None:
raise ValueError
return match
except:
pass
if call is None:
raise ValueError
else:
return call(value)
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