new_contents: """
  homeassistant.components.logger
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Component that will help guide the user taking its first steps.
  
  For more details about this component, please refer to the documentation at
  https://home-assistant.io/components/logger.html
  
  Sample configuration
  
  logger:
    default: critical
    logs:
      homeassistant.components: debug
      homeassistant.components.device_tracker: critical
      homeassistant.components.camera: critical
  
  """
  import logging
  
  DOMAIN = 'logger'
  DEPENDENCIES = []
  
  LOGSEVERITY = {
      'CRITICAL': 50,
      'FATAL': 50,
      'ERROR': 40,
      'WARNING': 30,
      'WARN': 30,
      'INFO': 20,
      'DEBUG': 10,
      'NOTSET': 0
  }
  
  LOGGER_DEFAULT = 'default'
  LOGGER_LOGS = 'logs'
  
  
  class HomeAssistantLogFilter(logging.Filter):
      def __init__(self, logfilter):
          self.logfilter = logfilter
  
      def filter(self, record):
  
          # Log with filterd severity
          if LOGGER_LOGS in self.logfilter:
              for keyvalue in self.logfilter[LOGGER_LOGS]:
                  filtername = keyvalue[0]
                  logseverity = keyvalue[1]
                  if record.name.startswith(filtername):
                      return record.levelno >= logseverity
  
          # Log with default severity
          default = self.logfilter[LOGGER_DEFAULT]
          return record.levelno >= default
  
  
  def setup(hass, config=None):
      """ Setup the logger component. """
  
      root_logger = logging.getLogger()
  
      loggerconfig = config.get(DOMAIN)
      logfilter = dict()
  
      # Set default log severity
      logfilter[LOGGER_DEFAULT] = LOGSEVERITY['debug'.upper()]
      if LOGGER_DEFAULT in loggerconfig:
          logfilter[LOGGER_DEFAULT] = LOGSEVERITY[loggerconfig[LOGGER_DEFAULT].upper()]
  
      # Compute logseverity for components
      if LOGGER_LOGS in loggerconfig:
          for key, value in loggerconfig[LOGGER_LOGS].items():
              loggerconfig[LOGGER_LOGS][key] = LOGSEVERITY[value.upper()]
  
          logs = sorted(loggerconfig[LOGGER_LOGS].items(), key=lambda t: t[0], reverse=True)
          logfilter[LOGGER_LOGS] = logs
  
      # Set log filter for all log handler
      for handler in logging.root.handlers:
          handler.addFilter(HomeAssistantLogFilter(logfilter))
          root_logger.info(logfilter)
  
      return True
  
subject: Add logger feature