<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _publish_scan_response(self, client):
 """Publish a scan response message The message contains all of the devices that are currently known to this agent. Connection strings for direct connections are translated to what is appropriate for this agent. Args: client (string):
 A unique id for the client that made this request """


        devices = self._manager.scanned_devices

        converted_devs = []
        for uuid, info in devices.items():
            slug = self._build_device_slug(uuid)

            message = {}
            message['uuid'] = uuid
            if uuid in self._connections:
                message['user_connected'] = True
            elif 'user_connected' in info:
                message['user_connected'] = info['user_connected']
            else:
                message['user_connected'] = False

            message['connection_string'] = slug
            message['signal_strength'] = info['signal_strength']

            converted_devs.append({x: y for x, y in message.items()})
            message['type'] = 'notification'
            message['operation'] = 'advertisement'

            self.client.publish(self.topics.gateway_topic(slug, 'data/advertisement'), message)

        probe_message = {}
        probe_message['type'] = 'response'
        probe_message['client'] = client
        probe_message['success'] = True
        probe_message['devices'] = converted_devs

        self.client.publish(self.topics.status, probe_message)