old_contents: import logging
  
  from ogn.client import AprsClient
  from ogn.gateway.process import process_beacon
  
  from manager import Manager
  
  manager = Manager()
  
  logging_formatstr = '%(asctime)s - %(levelname).4s - %(name)s - %(message)s'
  log_levels = ['CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG']
  
  
  @manager.command
  def run(aprs_user='anon-dev', logfile='main.log', loglevel='INFO'):
      """Run the aprs client."""
  
      # User input validation
      if len(aprs_user) < 3 or len(aprs_user) > 9:
          print('aprs_user must be a string of 3-9 characters.')
          return
      if loglevel not in log_levels:
          print('loglevel must be an element of {}.'.format(log_levels))
          return
  
      # Enable logging
      log_handlers = [logging.StreamHandler()]
      if logfile:
          log_handlers.append(logging.FileHandler(logfile))
      logging.basicConfig(format=logging_formatstr, level=loglevel, handlers=log_handlers)
  
      print('Start ogn gateway')
      client = AprsClient(aprs_user)
      client.connect()
  
      try:
          client.run(callback=process_beacon, autoreconnect=True)
      except KeyboardInterrupt:
          print('\nStop ogn gateway')
  
      client.disconnect()
      logging.shutdown()
  
  
  @manager.command
  def import_logfile(ogn_logfile, logfile='main.log', loglevel='INFO'):
      """Import OGN-data from ogn-log-files <arg: ogn-logfile>."""
  
      # Check if filename exists
      try:
          f = open(ogn_logfile, 'r')
      except:
          print('\nError reading ogn-logfile:', ogn_logfile)
          return
  
      # Enable logging
      log_handlers = [logging.StreamHandler()]
      if logfile:
          log_handlers.append(logging.FileHandler(logfile))
      logging.basicConfig(format=logging_formatstr, level=loglevel, handlers=log_handlers)
  
      print('Start importing ogn-logfile')
      for line in f:
          process_beacon(line)
  
      f.close()
      logging.shutdown()
  
new_contents: import logging
  
  from ogn.client import AprsClient
  from ogn.gateway.process import process_beacon
  
  from manager import Manager
  
  manager = Manager()
  
  logging_formatstr = '%(asctime)s - %(levelname).4s - %(name)s - %(message)s'
  log_levels = ['CRITICAL', 'ERROR', 'WARNING', 'INFO', 'DEBUG']
  
  
  @manager.command
  def run(aprs_user='anon-dev', logfile='main.log', loglevel='INFO'):
      """Run the aprs client."""
  
      # User input validation
      if len(aprs_user) < 3 or len(aprs_user) > 9:
          print('aprs_user must be a string of 3-9 characters.')
          return
      if loglevel not in log_levels:
          print('loglevel must be an element of {}.'.format(log_levels))
          return
  
      # Enable logging
      log_handlers = [logging.StreamHandler()]
      if logfile:
          log_handlers.append(logging.FileHandler(logfile))
      logging.basicConfig(format=logging_formatstr, level=loglevel, handlers=log_handlers)
  
      print('Start ogn gateway')
      client = AprsClient(aprs_user)
      client.connect()
  
      try:
          client.run(callback=process_beacon, autoreconnect=True)
      except KeyboardInterrupt:
          print('\nStop ogn gateway')
  
      client.disconnect()
      logging.shutdown()
  
  
  @manager.command
  def import_logfile(ogn_logfile, reference_date, logfile='main.log', loglevel='INFO'):
      """Import OGN-data from ogn-log-files <arg: ogn-logfile, reference_date>. Reference date must be given in YYYY-MM-DD."""
  
      # Check if filename exists
      try:
          f = open(ogn_logfile, 'r')
      except:
          print('\nError reading ogn-logfile:', ogn_logfile)
          return
  
      # Enable logging
      log_handlers = [logging.StreamHandler()]
      if logfile:
          log_handlers.append(logging.FileHandler(logfile))
      logging.basicConfig(format=logging_formatstr, level=loglevel, handlers=log_handlers)
  
      print('Start importing ogn-logfile')
      for line in f:
          process_beacon(line, reference_date)
  
      f.close()
      logging.shutdown()
  
subject: Add reference_date argument