new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  # pylint: disable=missing-docstring
  
  import json
  from datetime import date, datetime
  from .common import common
  
  class jsonl(object):
      """ jsonl exporter plugin.
  
      As opposed to json exporter jsonl serializes messages as one JSON object per line, not as
      one giant array.
  
      See http://jsonlines.org.
      """
      # pylint: disable=no-self-use
  
      def __init__(self):
          """ constructor """
          pass
  
      def format(self, msg, exporter_context):
          """ Formatter method. Takes raw msg and converts it to a *one-line* string.
              :param msg: Raw message object :class:`telethon.tl.types.Message` and derivatives.
                          https://core.telegram.org/type/Message
  
              :returns: *one-line* string containing one message data.
          """
          # pylint: disable=line-too-long
          name, _, content, re_id, is_sent_by_bot, is_contains_media, media_content = common.extract_message_data(msg)
  
          msgDictionary = {
              'message_id': msg.id,
              'from_id': msg.from_id,
              'reply_id': re_id,
              'author': name,
              'sent_by_bot': is_sent_by_bot,
              'date': msg.date,
              'content': content,
              'contains_media': is_contains_media,
              'media_content': media_content
          }
          msg_dump_str = json.dumps(
              msgDictionary, default=self._json_serial, ensure_ascii=False)
          return msg_dump_str
  
      def begin_final_file(self, resulting_file):
          pass
  
      def end_final_file(self, resulting_file):
          pass
  
      def _json_serial(self, obj):
          """JSON serializer for objects not serializable by default json code
             https://stackoverflow.com/questions/11875770/how-to-overcome-datetime-datetime-not-json-serializable
          """
          if isinstance(obj, (datetime, date)):
              return obj.isoformat()
          raise TypeError("Type %s not serializable" % type(obj))
  
subject: Add JSONL exporter