ConfigModel.py

import functools, logging, operator
from enum import Enum
from typing import Dict, List, Optional, Tuple, Union
from common.orm.Database import Database
from common.orm.HighLevel import get_object, get_or_create_object, update_or_create_object
from common.orm.backend.Tools import key_to_str
from common.orm.fields.EnumeratedField import EnumeratedField
from common.orm.fields.ForeignKeyField import ForeignKeyField
from common.orm.fields.IntegerField import IntegerField
from common.orm.fields.PrimaryKeyField import PrimaryKeyField
from common.orm.fields.StringField import StringField
from common.orm.model.Model import Model
from context.proto.context_pb2 import ConfigActionEnum
from .Tools import fast_hasher, grpc_to_enum, remove_dict_key

LOGGER = logging.getLogger(__name__)

class ORM_ConfigActionEnum(Enum):
    UNDEFINED = ConfigActionEnum.CONFIGACTION_UNDEFINED
    SET       = ConfigActionEnum.CONFIGACTION_SET
    DELETE    = ConfigActionEnum.CONFIGACTION_DELETE

grpc_to_enum__config_action = functools.partial(
    grpc_to_enum, ConfigActionEnum, ORM_ConfigActionEnum)

class ConfigModel(Model): # pylint: disable=abstract-method
    pk = PrimaryKeyField()

    def dump(self) -> List[Dict]:
        db_config_rule_pks = self.references(ConfigRuleModel)
        config_rules = [ConfigRuleModel(self.database, pk).dump(include_position=True) for pk,_ in db_config_rule_pks]
        config_rules = sorted(config_rules, key=operator.itemgetter('position'))
        return [remove_dict_key(config_rule, 'position') for config_rule in config_rules]

class ConfigRuleModel(Model): # pylint: disable=abstract-method
    pk = PrimaryKeyField()
    config_fk = ForeignKeyField(ConfigModel)
    position = IntegerField(min_value=0, required=True)
    action = EnumeratedField(ORM_ConfigActionEnum, required=True)
    key = StringField(required=True, allow_empty=False)
    value = StringField(required=True, allow_empty=False)

    def dump(self, include_position=True) -> Dict: # pylint: disable=arguments-differ
        result = {
            'action': self.action.value,
            'resource_key': self.key,
            'resource_value': self.value,
        }
        if include_position: result['position'] = self.position
        return result

def set_config_rule(
    database : Database, db_config : ConfigModel, grpc_config_rule, position : int
    ) -> Tuple[ConfigRuleModel, bool]:

    str_rule_key_hash = fast_hasher(grpc_config_rule.resource_key)
    str_config_rule_key = key_to_str([db_config.pk, str_rule_key_hash], separator=':')

    result : Tuple[ConfigRuleModel, bool] = update_or_create_object(database, ConfigRuleModel, str_config_rule_key, {
        'config_fk': db_config,
        'position' : position,
        'action'   : grpc_to_enum__config_action(grpc_config_rule.action),
        'key'      : grpc_config_rule.resource_key,
        'value'    : grpc_config_rule.resource_value,
    })
    db_config_rule, updated = result
    return db_config_rule, updated

def delete_config_rule(
    database : Database, db_config : ConfigModel, grpc_config_rule
    ) -> Tuple[ConfigRuleModel, bool]:

    str_rule_key_hash = fast_hasher(grpc_config_rule.resource_key)
    str_config_rule_key = key_to_str([db_config.pk, str_rule_key_hash], separator=':')

    db_config_rule : Optional[ConfigRuleModel] = get_object(
        database, ConfigRuleModel, str_config_rule_key, raise_if_not_found=False)
    db_config_rule.delete()

def set_config(
    database : Database, db_parent_pk : str, config_name : str, grpc_config_rules
    ) -> List[Tuple[Union[ConfigModel, ConfigRuleModel], bool]]:

    str_config_key = key_to_str([db_parent_pk, config_name], separator=':')
    result : Tuple[ConfigModel, bool] = get_or_create_object(database, ConfigModel, str_config_key)
    db_config, created = result

    db_objects = [(db_config, created)]

    for position,grpc_config_rule in enumerate(grpc_config_rules):
        action = grpc_to_enum__config_action(grpc_config_rule.action)
        if action == ORM_ConfigActionEnum.SET:
            result : Tuple[ConfigRuleModel, bool] = set_config_rule(database, db_config, grpc_config_rule, position)
            db_config_rule, updated = result
            db_objects.append((db_config_rule, updated))
        elif action == ORM_ConfigActionEnum.DELETE:
            delete_config_rule(database, db_config, grpc_config_rule)
        else:
            msg = 'Unsupported action({:s})'
            raise AttributeError(msg.format(str(ConfigActionEnum.Name(grpc_config_rule.action))))

    return db_objects