text: # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you 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.
  from typing import Any, Set
  
  from sqlalchemy import or_
  from sqlalchemy.orm import Query
  
  from superset import security_manager
  from superset.views.base import BaseFilter
  
  
  class DatabaseFilter(BaseFilter):
      # TODO(bogdan): consider caching.
      def schema_access_databases(self) -> Set[str]:  # noqa pylint: disable=no-self-use
          return {
              security_manager.unpack_schema_perm(vm)[0]
              for vm in security_manager.user_view_menu_names("schema_access")
          }
  
      def apply(self, query: Query, value: Any) -> Query:
          if security_manager.can_access_all_databases():
              return query
          database_perms = security_manager.user_view_menu_names("database_access")
          # TODO(bogdan): consider adding datasource access here as well.
          schema_access_databases = self.schema_access_databases()
          project_ids = security_manager.get_project_ids()
          return query.filter(
              or_(
                  self.model.perm.in_(database_perms),
                  self.model.database_name.in_(schema_access_databases),
                  self.model.id.in_(project_ids),
              )
          )
  