forked from gergely/calendar-social
119 lines
3.4 KiB
Python
119 lines
3.4 KiB
Python
# Calendar.social
|
|
# Copyright (C) 2018 Gergely Polonkai
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License
|
|
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
"""Utility functions for Calendar.social
|
|
"""
|
|
|
|
from contextlib import contextmanager
|
|
|
|
@contextmanager
|
|
def force_locale(locale):
|
|
"""Temporarily overrides the currently selected locale.
|
|
|
|
Sometimes it is useful to switch the current locale to different one, do some tasks and then
|
|
revert back to the original one. For example, if the user uses German on the web site, but
|
|
you want to send them an email in English, you can use this function as a context manager::
|
|
|
|
with force_locale('en_US'):
|
|
send_email(gettext('Hello!'), ...)
|
|
|
|
Shamelessly extracted from Flask-Babel.
|
|
|
|
:param locale: The locale to temporary switch to (ex: 'en_US').
|
|
:type locale: str
|
|
"""
|
|
|
|
from flask import current_app, has_request_context, request
|
|
|
|
def _get_current_context():
|
|
if has_request_context():
|
|
return request
|
|
|
|
if current_app:
|
|
return current_app
|
|
|
|
return None
|
|
|
|
ctx = _get_current_context()
|
|
if ctx is None:
|
|
yield
|
|
return
|
|
|
|
babel = current_app.extensions['babel']
|
|
|
|
orig_locale_selector_func = babel.locale_selector_func
|
|
orig_attrs = {}
|
|
for key in ('babel_translations', 'babel_locale'):
|
|
orig_attrs[key] = getattr(ctx, key, None)
|
|
|
|
try:
|
|
babel.locale_selector_func = lambda: locale
|
|
for key in orig_attrs:
|
|
setattr(ctx, key, None)
|
|
yield
|
|
finally:
|
|
babel.locale_selector_func = orig_locale_selector_func
|
|
for key, value in orig_attrs.items():
|
|
setattr(ctx, key, value)
|
|
|
|
|
|
class RoutedMixin:
|
|
"""Mixin to lazily register class methods as routes
|
|
|
|
Works both for `Flask` and `Blueprint` objects.
|
|
|
|
Example::
|
|
|
|
class MyBlueprint(Blueprint, RoutedMixin):
|
|
def __init__(self, *args, **kwargs):
|
|
do_whatever_you_like()
|
|
|
|
RoutedMixin.register_routes(self)
|
|
|
|
@RoutedMixin.route('/')
|
|
def index(self):
|
|
return 'Hello, World!'
|
|
"""
|
|
|
|
def register_routes(self):
|
|
for attr_name in self.__dir__():
|
|
attr = getattr(self, attr_name)
|
|
|
|
if not callable(attr):
|
|
continue
|
|
|
|
args, kwargs = getattr(attr, 'routing', (None, None))
|
|
|
|
if args is None:
|
|
continue
|
|
|
|
self.route(*args, **kwargs)(attr)
|
|
|
|
@staticmethod
|
|
def route(*args, **kwargs):
|
|
"""Mark a function as a future route
|
|
|
|
Such functions will be iterated over when the application is initialised. ``*args`` and
|
|
``**kwargs`` will be passed verbatim to `Flask.route()`.
|
|
"""
|
|
|
|
def decorator(func): # pylint: disable=missing-docstring
|
|
setattr(func, 'routing', (args, kwargs))
|
|
|
|
return func
|
|
|
|
return decorator
|