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# Copyright 2021-2023 H2020 TeraFlow (https://www.teraflow-h2020.eu/)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import json
from sqlalchemy.dialects.postgresql import insert
from sqlalchemy.engine import Engine
from sqlalchemy.orm import Session, sessionmaker
from sqlalchemy_cockroachdb import run_transaction
from typing import Dict, List, Optional, Set, Tuple
from common.proto.policy_pb2 import PolicyRule, PolicyRuleId, PolicyRuleIdList, PolicyRuleList
from common.method_wrappers.ServiceExceptions import NotFoundException
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from common.tools.grpc.Tools import grpc_message_to_json
from common.tools.object_factory.PolicyRule import json_policyrule_id
from context.service.database.uuids.Device import device_get_uuid
from .models.enums.PolicyRuleState import grpc_to_enum__policyrule_state
from .models.PolicyRuleModel import PolicyRuleDeviceModel, PolicyRuleKindEnum, PolicyRuleModel
from .uuids.PolicuRule import policyrule_get_uuid
from .uuids.Service import service_get_uuid
def policyrule_list_ids(db_engine : Engine) -> PolicyRuleIdList:
def callback(session : Session) -> List[Dict]:
obj_list : List[PolicyRuleModel] = session.query(PolicyRuleModel).all()
#.options(selectinload(PolicyRuleModel.topology)).filter_by(context_uuid=context_uuid).one_or_none()
return [obj.dump_id() for obj in obj_list]
return PolicyRuleIdList(policyRuleIdList=run_transaction(sessionmaker(bind=db_engine), callback))
def policyrule_list_objs(db_engine : Engine) -> PolicyRuleList:
def callback(session : Session) -> List[Dict]:
obj_list : List[PolicyRuleModel] = session.query(PolicyRuleModel).all()
#.options(selectinload(PolicyRuleModel.topology)).filter_by(context_uuid=context_uuid).one_or_none()
return [obj.dump() for obj in obj_list]
return PolicyRuleList(policyRules=run_transaction(sessionmaker(bind=db_engine), callback))
def policyrule_get(db_engine : Engine, request : PolicyRuleId) -> PolicyRule:
policyrule_uuid = policyrule_get_uuid(request, allow_random=False)
def callback(session : Session) -> Optional[Dict]:
obj : Optional[PolicyRuleModel] = session.query(PolicyRuleModel)\
.filter_by(policyrule_uuid=policyrule_uuid).one_or_none()
return None if obj is None else obj.dump()
obj = run_transaction(sessionmaker(bind=db_engine), callback)
if obj is None:
raw_policyrule_uuid = request.uuid.uuid
raise NotFoundException('PolicyRule', raw_policyrule_uuid, extra_details=[
'policyrule_uuid generated was: {:s}'.format(policyrule_uuid)
])
return PolicyRule(**obj)
def policyrule_set(db_engine : Engine, request : PolicyRule) -> Tuple[PolicyRuleId, bool]:
policyrule_kind = request.WhichOneof('policy_rule')
policyrule_spec = getattr(request, policyrule_kind)
policyrule_basic = policyrule_spec.policyRuleBasic
policyrule_id = policyrule_basic.policyRuleId
policyrule_uuid = policyrule_get_uuid(policyrule_id, allow_random=False)
policyrule_kind = PolicyRuleKindEnum._member_map_.get(policyrule_kind.upper()) # pylint: disable=no-member
policyrule_state = grpc_to_enum__policyrule_state(policyrule_basic.policyRuleState.policyRuleState)
policyrule_state_message = policyrule_basic.policyRuleState.policyRuleStateMessage
json_policyrule_basic = grpc_message_to_json(policyrule_basic)
policyrule_eca_data = json.dumps({
'conditionList': json_policyrule_basic.get('conditionList', []),
'booleanOperator': json_policyrule_basic['booleanOperator'],
'actionList': json_policyrule_basic.get('actionList', []),
}, sort_keys=True)
policyrule_data = [{
'policyrule_uuid' : policyrule_uuid,
'policyrule_kind' : policyrule_kind,
'policyrule_state' : policyrule_state,
'policyrule_state_message': policyrule_state_message,
'policyrule_priority' : policyrule_basic.priority,
'policyrule_eca_data' : policyrule_eca_data,
}]
policyrule_service_uuid = None
if policyrule_kind == PolicyRuleKindEnum.SERVICE:
_,policyrule_service_uuid = service_get_uuid(policyrule_spec.serviceId, allow_random=False)
policyrule_data[0]['policyrule_service_uuid'] = policyrule_service_uuid
device_uuids : Set[str] = set()
related_devices : List[Dict] = list()
for device_id in policyrule_spec.deviceList:
device_uuid = device_get_uuid(device_id, allow_random=False)
if device_uuid in device_uuids: continue
related_devices.append({
'policyrule_uuid': policyrule_uuid,
'device_uuid' : device_uuid,
})
device_uuids.add(device_uuid)
def callback(session : Session) -> None:
stmt = insert(PolicyRuleModel).values(policyrule_data)
stmt = stmt.on_conflict_do_update(
index_elements=[PolicyRuleModel.policyrule_uuid],
set_=dict(
policyrule_state = stmt.excluded.policyrule_state,
policyrule_state_message = stmt.excluded.policyrule_state_message,
policyrule_priority = stmt.excluded.policyrule_priority,
policyrule_eca_data = stmt.excluded.policyrule_eca_data,
)
)
session.execute(stmt)
if len(related_devices) > 0:
session.execute(insert(PolicyRuleDeviceModel).values(related_devices).on_conflict_do_nothing(
index_elements=[PolicyRuleDeviceModel.policyrule_uuid, PolicyRuleDeviceModel.device_uuid]
))
run_transaction(sessionmaker(bind=db_engine), callback)
updated = False # TODO: improve and check if created/updated
return PolicyRuleId(**json_policyrule_id(policyrule_uuid)),updated
def policyrule_delete(db_engine : Engine, request : PolicyRuleId) -> bool:
policyrule_uuid = policyrule_get_uuid(request, allow_random=False)
def callback(session : Session) -> bool:
num_deleted = session.query(PolicyRuleModel).filter_by(policyrule_uuid=policyrule_uuid).delete()
return num_deleted > 0
return run_transaction(sessionmaker(bind=db_engine), callback)