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# Copyright (C) 2007-2016 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Language manager."""
__all__ = [
'LanguageManager',
]
from mailman.interfaces.configuration import ConfigurationUpdatedEvent
from mailman.interfaces.languages import ILanguageManager
from mailman.languages.language import Language
from zope.component import getUtility
from zope.interface import implementer
@implementer(ILanguageManager)
class LanguageManager:
"""Language manager."""
def __init__(self):
# Mapping from 2-letter code to Language instance.
self._languages = {}
def add(self, code, charset, description):
"""See `ILanguageManager`."""
if code in self._languages:
raise ValueError('Language code already registered: ' + code)
language = Language(code, charset, description)
self._languages[code] = language
return language
@property
def codes(self):
"""See `ILanguageManager`."""
return iter(self._languages)
@property
def languages(self):
"""See `ILanguageManager`."""
return iter(self._languages.values())
def get(self, code, default=None):
"""See `ILanguageManager`."""
return self._languages.get(code, default)
def __getitem__(self, code):
"""See `ILanguageManager`."""
return self._languages[code]
def __contains__(self, code):
"""See `ILanguageManager`."""
return code in self._languages
def clear(self):
"""See `ILanguageManager`."""
self._languages.clear()
def handle_ConfigurationUpdatedEvent(event):
if not isinstance(event, ConfigurationUpdatedEvent):
return
manager = getUtility(ILanguageManager)
for language in event.config.language_configs:
if language.enabled:
code = language.name.split('.')[1]
manager.add(code, language.charset, language.description)
# the default language must always be available.
assert event.config.mailman.default_language in manager, (
'system default language code not defined: {0}'.format(
event.config.mailman.default_language))
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