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# Copyright 2010 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Cross application type errors for launchpad."""
__metaclass__ = type
__all__ = [
'GoneError',
'NameLookupFailed',
'NotFoundError',
'POSTToNonCanonicalURL',
'TranslationUnavailable',
'UnexpectedFormData',
'UserCannotUnsubscribePerson',
]
import httplib
from lazr.restful.declarations import error_status
from zope.security.interfaces import (
ForbiddenAttribute,
Unauthorized,
)
class TranslationUnavailable(Exception):
"""Translation objects are unavailable."""
@error_status(httplib.NOT_FOUND)
class NotFoundError(KeyError):
"""Launchpad object not found."""
@error_status(httplib.GONE)
class GoneError(KeyError):
"""Launchpad object is gone."""
class NameLookupFailed(NotFoundError):
"""Raised when a lookup by name fails.
Subclasses should define the `_message_prefix` class variable, which will
be prefixed to the quoted name of the name that could not be found.
:ivar name: The name that could not be found.
"""
_message_prefix = "Not found"
def __init__(self, name, message=None):
if message is None:
message = self._message_prefix
self.message = "%s: '%s'." % (message, name)
self.name = name
NotFoundError.__init__(self, self.message)
def __str__(self):
return self.message
class UnexpectedFormData(AssertionError):
"""Got form data that is not what is expected by a form handler."""
class POSTToNonCanonicalURL(UnexpectedFormData):
"""Got a POST to an incorrect URL.
One example would be a URL containing uppercase letters.
"""
@error_status(httplib.UNAUTHORIZED)
class UserCannotUnsubscribePerson(Unauthorized):
"""User does not have permission to unsubscribe person or team."""
# Slam a 401 response code onto all ForbiddenAttribute errors.
error_status(httplib.UNAUTHORIZED)(ForbiddenAttribute)
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