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# Copyright 2011 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""Model classes for pillar and artifact access policies."""
__metaclass__ = type
__all__ = [
'AccessPolicy',
'AccessPolicyArtifact',
'AccessPolicyGrant',
]
from storm.properties import (
Int,
DateTime,
)
from storm.references import Reference
from zope.interface import implements
from canonical.database.enumcol import DBEnum
from canonical.launchpad.interfaces.lpstorm import IStore
from lp.registry.interfaces.accesspolicy import (
AccessPolicyType,
IAccessPolicy,
IAccessPolicyArtifact,
IAccessPolicyGrant,
)
from lp.services.database.stormbase import StormBase
class AccessPolicy(StormBase):
implements(IAccessPolicy)
__storm_table__ = 'AccessPolicy'
id = Int(primary=True)
product_id = Int(name='product')
product = Reference(product_id, 'Product.id')
distribution_id = Int(name='distribution')
distribution = Reference(distribution_id, 'Distribution.id')
type = DBEnum(allow_none=True, enum=AccessPolicyType)
@property
def pillar(self):
return self.product or self.distribution
@classmethod
def create(cls, pillar, type):
from lp.registry.interfaces.distribution import IDistribution
from lp.registry.interfaces.product import IProduct
obj = cls()
if IProduct.providedBy(pillar):
obj.product = pillar
elif IDistribution.providedBy(pillar):
obj.distribution = pillar
else:
raise ValueError("%r is not a supported pillar" % pillar)
obj.type = type
IStore(cls).add(obj)
return obj
@classmethod
def _constraintForPillar(cls, pillar):
from lp.registry.interfaces.distribution import IDistribution
from lp.registry.interfaces.product import IProduct
if IProduct.providedBy(pillar):
col = cls.product
elif IDistribution.providedBy(pillar):
col = cls.distribution
else:
raise ValueError("%r is not a supported pillar" % pillar)
return col == pillar
@classmethod
def getByID(cls, id):
"""See `IAccessPolicySource`."""
return IStore(cls).get(cls, id)
@classmethod
def findByPillar(cls, pillar):
"""See `IAccessPolicySource`."""
return IStore(cls).find(cls, cls._constraintForPillar(pillar))
@classmethod
def getByPillarAndType(cls, pillar, type):
"""See `IAccessPolicySource`."""
return cls.findByPillar(pillar).find(type=type).one()
class AccessPolicyArtifact(StormBase):
implements(IAccessPolicyArtifact)
__storm_table__ = 'AccessPolicyArtifact'
id = Int(primary=True)
bug_id = Int(name='bug')
bug = Reference(bug_id, 'Bug.id')
branch_id = Int(name='branch')
branch = Reference(branch_id, 'Branch.id')
policy_id = Int(name='policy')
policy = Reference(policy_id, 'AccessPolicy.id')
@property
def concrete_artifact(self):
artifact = self.bug or self.branch
assert artifact is not None
return artifact
@staticmethod
def _getConcreteAttribute(concrete_artifact):
from lp.bugs.interfaces.bug import IBug
from lp.code.interfaces.branch import IBranch
if IBug.providedBy(concrete_artifact):
return 'bug'
elif IBranch.providedBy(concrete_artifact):
return 'branch'
else:
raise ValueError(
"%r is not a valid artifact" % concrete_artifact)
@classmethod
def get(cls, concrete_artifact):
"""See `IAccessPolicyArtifactSource`."""
constraints = {
cls._getConcreteAttribute(concrete_artifact): concrete_artifact}
return IStore(cls).find(cls, **constraints).one()
@classmethod
def ensure(cls, concrete_artifact):
"""See `IAccessPolicyArtifactSource`."""
existing = cls.get(concrete_artifact)
if existing is not None:
return existing
# No existing object. Create a new one.
obj = cls()
setattr(
obj, cls._getConcreteAttribute(concrete_artifact),
concrete_artifact)
IStore(cls).add(obj)
return obj
@classmethod
def delete(cls, concrete_artifact):
"""See `IAccessPolicyArtifactSource`."""
abstract = cls.get(concrete_artifact)
if abstract is None:
return
IStore(abstract).find(
AccessPolicyGrant, abstract_artifact=abstract).remove()
IStore(abstract).find(AccessPolicyArtifact, id=abstract.id).remove()
class AccessPolicyGrant(StormBase):
implements(IAccessPolicyGrant)
__storm_table__ = 'AccessPolicyGrant'
id = Int(primary=True)
grantee_id = Int(name='grantee')
grantee = Reference(grantee_id, 'Person.id')
policy_id = Int(name='policy')
policy = Reference(policy_id, 'AccessPolicy.id')
abstract_artifact_id = Int(name='artifact')
abstract_artifact = Reference(
abstract_artifact_id, 'AccessPolicyArtifact.id')
grantor_id = Int(name='grantor')
grantor = Reference(grantor_id, 'Person.id')
date_created = DateTime()
@property
def concrete_artifact(self):
if self.abstract_artifact is not None:
return self.abstract_artifact.concrete_artifact
@classmethod
def grant(cls, grantee, grantor, object):
"""See `IAccessPolicyGrantSource`."""
grant = cls()
grant.grantee = grantee
grant.grantor = grantor
if IAccessPolicy.providedBy(object):
grant.policy = object
elif IAccessPolicyArtifact.providedBy(object):
grant.abstract_artifact = object
else:
raise ValueError("Unsupported object: %r" % object)
IStore(cls).add(grant)
return grant
@classmethod
def getByID(cls, id):
"""See `IAccessPolicyGrantSource`."""
return IStore(cls).get(cls, id)
@classmethod
def findByPolicy(cls, policy):
"""See `IAccessPolicyGrantSource`."""
return IStore(cls).find(cls, policy=policy)
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