old_contents: """
  Hangouts notification service.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/notify.hangouts/
  """
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.notify import (ATTR_TARGET, PLATFORM_SCHEMA,
                                               NOTIFY_SERVICE_SCHEMA,
                                               BaseNotificationService,
                                               ATTR_MESSAGE, ATTR_DATA)
  
  from homeassistant.components.hangouts.const \
      import (DOMAIN, SERVICE_SEND_MESSAGE, MESSAGE_DATA_SCHEMA,
              TARGETS_SCHEMA, CONF_DEFAULT_CONVERSATIONS)
  
  _LOGGER = logging.getLogger(__name__)
  
  DEPENDENCIES = [DOMAIN]
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Required(CONF_DEFAULT_CONVERSATIONS): [TARGETS_SCHEMA]
  })
  
  NOTIFY_SERVICE_SCHEMA = NOTIFY_SERVICE_SCHEMA.extend({
      vol.Optional(ATTR_TARGET): [TARGETS_SCHEMA],
      vol.Optional(ATTR_DATA, default={}): MESSAGE_DATA_SCHEMA
  })
  
  
  def get_service(hass, config, discovery_info=None):
      """Get the Hangouts notification service."""
      return HangoutsNotificationService(config.get(CONF_DEFAULT_CONVERSATIONS))
  
  
  class HangoutsNotificationService(BaseNotificationService):
      """Send Notifications to Hangouts conversations."""
  
      def __init__(self, default_conversations):
          """Set up the notification service."""
          self._default_conversations = default_conversations
  
      def send_message(self, message="", **kwargs):
          """Send the message to the Google Hangouts server."""
          target_conversations = None
          if ATTR_TARGET in kwargs:
              target_conversations = []
              for target in kwargs.get(ATTR_TARGET):
                  target_conversations.append({'id': target})
          else:
              target_conversations = self._default_conversations
  
          messages = []
          if 'title' in kwargs:
              messages.append({'text': kwargs['title'], 'is_bold': True})
  
          messages.append({'text': message, 'parse_str': True})
          service_data = {
              ATTR_TARGET: target_conversations,
              ATTR_MESSAGE: messages,
              ATTR_DATA: kwargs[ATTR_DATA]
          }
  
          return self.hass.services.call(
              DOMAIN, SERVICE_SEND_MESSAGE, service_data=service_data)
  
new_contents: """
  Hangouts notification service.
  
  For more details about this platform, please refer to the documentation at
  https://home-assistant.io/components/notify.hangouts/
  """
  import logging
  
  import voluptuous as vol
  
  from homeassistant.components.notify import (ATTR_TARGET, PLATFORM_SCHEMA,
                                               BaseNotificationService,
                                               ATTR_MESSAGE, ATTR_DATA)
  
  from homeassistant.components.hangouts.const \
      import (DOMAIN, SERVICE_SEND_MESSAGE, TARGETS_SCHEMA,
              CONF_DEFAULT_CONVERSATIONS)
  
  _LOGGER = logging.getLogger(__name__)
  
  DEPENDENCIES = [DOMAIN]
  
  PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
      vol.Required(CONF_DEFAULT_CONVERSATIONS): [TARGETS_SCHEMA]
  })
  
  
  def get_service(hass, config, discovery_info=None):
      """Get the Hangouts notification service."""
      return HangoutsNotificationService(config.get(CONF_DEFAULT_CONVERSATIONS))
  
  
  class HangoutsNotificationService(BaseNotificationService):
      """Send Notifications to Hangouts conversations."""
  
      def __init__(self, default_conversations):
          """Set up the notification service."""
          self._default_conversations = default_conversations
  
      def send_message(self, message="", **kwargs):
          """Send the message to the Google Hangouts server."""
          target_conversations = None
          if ATTR_TARGET in kwargs:
              target_conversations = []
              for target in kwargs.get(ATTR_TARGET):
                  target_conversations.append({'id': target})
          else:
              target_conversations = self._default_conversations
  
          messages = []
          if 'title' in kwargs:
              messages.append({'text': kwargs['title'], 'is_bold': True})
  
          messages.append({'text': message, 'parse_str': True})
          service_data = {
              ATTR_TARGET: target_conversations,
              ATTR_MESSAGE: messages,
          }
          if kwargs[ATTR_DATA]:
              service_data[ATTR_DATA] = kwargs[ATTR_DATA]
  
          return self.hass.services.call(
              DOMAIN, SERVICE_SEND_MESSAGE, service_data=service_data)
  
subject: Fix hangouts notify (#18372)