/usr/share/pyshared/lazr/lifecycle/event.py is in python-lazr.lifecycle 1.0-0ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# This file is part of lazr.lifecycle
#
# lazr.lifecycle is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, version 3 of the License.
#
# lazr.lifecycle 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 Lesser General Public
# License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with lazr.lifecycle. If not, see <http://www.gnu.org/licenses/>.
__metaclass__ = type
__all__ = ['ObjectCreatedEvent',
'ObjectDeletedEvent',
'ObjectModifiedEvent',
]
from zope.component import getUtility
from zope.interface import implements
import zope.security.management as management
from lazr.lifecycle.interfaces import (
IObjectCreatedEvent, IObjectModifiedEvent, IObjectDeletedEvent)
class LifecyleEventBase:
"""Base class for all LAZR lifecycle event.
It fills the user attribute based on the current interaction.
"""
def __init__(self, object, user=None):
self.object = object
if user is None:
user = self._getDefaultUser()
self.user = user
def _getDefaultUser(self):
"""Return the principal registered in the interaction.
This raises a ValueError in case there is more than one principal in
the interaction.
"""
interaction = management.queryInteraction()
if interaction is None:
return None
principals = [
participation.principal
for participation in list(interaction.participations)
if participation.principal is not None
]
if len(principals) == 1:
return principals[0]
elif len(principals) > 1:
raise ValueError('Too many principals')
else:
return None
class ObjectCreatedEvent(LifecyleEventBase):
"""See `IObjectCreatedEvent`."""
implements(IObjectCreatedEvent)
class ObjectDeletedEvent(LifecyleEventBase):
"""See `IObjectDeletedEvent`."""
implements(IObjectDeletedEvent)
class ObjectModifiedEvent(LifecyleEventBase):
"""See `ISQLObjectModifiedEvent`."""
implements(IObjectModifiedEvent)
def __init__(self, object, object_before_modification, edited_fields,
user=None):
super(ObjectModifiedEvent, self).__init__(object, user=user)
self.object_before_modification = object_before_modification
self.edited_fields = edited_fields
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