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# friends-service -- send & receive messages from any social network
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# Copyright (C) 2012 Canonical Ltd
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3 of the License.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""Protocol base class and manager."""
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from pkg_resources import resource_listdir
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from friends.utils.base import Base
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class ProtocolManager:
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"""Discover all protocol classes."""
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self.protocols = dict((cls.__name__.lower(), cls)
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for cls in self._protocol_classes)
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def _protocol_classes(self):
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"""Search for and return all protocol classes."""
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for filename in resource_listdir('friends', 'protocols'):
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basename, extension = os.path.splitext(filename)
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if extension != '.py':
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module_path = 'friends.protocols.' + basename
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module = importlib.import_module(module_path)
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# Scan all the objects in the module's __all__ and add any which
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# are subclasses of the base protocol class. Essentially skip any
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# modules that don't have an __all__ (e.g. the __init__.py).
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# However, the module better not lie about its __all__ members.
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for name in getattr(module, '__all__', []):
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obj = getattr(module, name)
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if issubclass(obj, Base):
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protocol_manager = ProtocolManager()
added
removed
friends/utils/manager.py
