text: # -*- coding: utf-8 -*-
  # 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 dataclasses import dataclass
  from typing import Any, List, Optional, Type
  
  import pandas as pd
  
  from superset.models.reports import ReportRecipients, ReportRecipientType
  
  
  @dataclass
  class NotificationContent:
      name: str
      csv: Optional[bytes] = None  # bytes for csv file
      screenshot: Optional[bytes] = None  # bytes for the screenshot
      text: Optional[str] = None
      description: Optional[str] = ""
      url: Optional[str] = None  # url to chart/dashboard for this screenshot
      embedded_data: Optional[pd.DataFrame] = None
  
  
  class BaseNotification:  # pylint: disable=too-few-public-methods
      """
      Serves has base for all notifications and creates a simple plugin system
      for extending future implementations.
      Child implementations get automatically registered and should identify the
      notification type
      """
  
      plugins: List[Type["BaseNotification"]] = []
      type: Optional[ReportRecipientType] = None
      """
      Child classes set their notification type ex: `type = "email"` this string will be
      used by ReportRecipients.type to map to the correct implementation
      """
  
      def __init_subclass__(cls, *args: Any, **kwargs: Any) -> None:
          super().__init_subclass__(*args, **kwargs)  # type: ignore
          cls.plugins.append(cls)
  
      def __init__(
          self, recipient: ReportRecipients, content: NotificationContent
      ) -> None:
          self._recipient = recipient
          self._content = content
  
      def send(self) -> None:
          raise NotImplementedError()
  