<----SKIPPED LINES---->




FLAG_INSIGHT_FIRST_DEST = 6
FLAG_INSIGHT_FIRST_ORIGIN = 7
FLAG_INSIGHT_FIRST_AIRLINE = 8
FLAG_INSIGHT_FIRST_AIRCRAFT = 9
FLAG_INSIGHT_LONGEST_DELAY = 10
FLAG_INSIGHT_FLIGHT_DELAY_FREQUENCY = 11
FLAG_INSIGHT_FLIGHT_DELAY_TIME = 12
FLAG_INSIGHT_AIRLINE_DELAY_FREQUENCY = 13
FLAG_INSIGHT_AIRLINE_DELAY_TIME = 14
FLAG_INSIGHT_DESTINATION_DELAY_FREQUENCY = 15
FLAG_INSIGHT_DESTINATION_DELAY_TIME = 16
FLAG_INSIGHT_HOUR_DELAY_FREQUENCY = 17
FLAG_INSIGHT_HOUR_DELAY_TIME = 18
FLAG_INSIGHT_DATE_DELAY_FREQUENCY = 19
FLAG_INSIGHT_DATE_DELAY_TIME = 20
FLAG_INSIGHT_HELICOPTER = 21
INSIGHT_TYPES = 22

TEMP_FAN_TURN_ON_CELSIUS = 65
TEMP_FAN_TURN_OFF_CELSIUS = 55



# GPIO relay connections
# format: (GPIO pin, true message, false message, relay number,
# description, initial_state)
GPIO_ERROR_VESTABOARD_CONNECTION = (
    22,
    'ERROR: Vestaboard unavailable',
    'SUCCESS: Vestaboard available',
    1, 'Vestaboard connected', False)
GPIO_ERROR_FLIGHT_AWARE_CONNECTION = (
    23,
    'ERROR: FlightAware not available',
    'SUCCESS: FlightAware available',
    2, 'FlightAware connected', False)
GPIO_ERROR_ARDUINO_SERVO_CONNECTION = (
    24,
    'ERROR: Servos not running or lost connection',
    'SUCCESS: Handshake with servo Arduino received',
    3, 'Hemisphere connected', True)
GPIO_ERROR_ARDUINO_REMOTE_CONNECTION = (




                            <----SKIPPED LINES---->




if RASPBERRY_PI:
  PICKLE_FLIGHTS = MESSAGEBOARD_PATH + PICKLE_FLIGHTS
  PICKLE_DASHBOARD = MESSAGEBOARD_PATH + PICKLE_DASHBOARD
  LOGFILE = MESSAGEBOARD_PATH + LOGFILE
  PICKLE_DUMP_JSON_FILE = MESSAGEBOARD_PATH + PICKLE_DUMP_JSON_FILE
  PICKLE_FA_JSON_FILE = MESSAGEBOARD_PATH + PICKLE_FA_JSON_FILE
  PICKLE_SCREENS = MESSAGEBOARD_PATH + PICKLE_SCREENS
  CODE_REPOSITORY = MESSAGEBOARD_PATH

  HISTOGRAM_CONFIG_FILE = WEBSERVER_PATH + HISTOGRAM_CONFIG_FILE
  CONFIG_FILE = WEBSERVER_PATH + CONFIG_FILE
  ROLLING_MESSAGE_FILE = WEBSERVER_PATH + ROLLING_MESSAGE_FILE
  ALL_MESSAGE_FILE = WEBSERVER_PATH + ALL_MESSAGE_FILE
  ROLLING_LOGFILE = WEBSERVER_PATH + ROLLING_LOGFILE
  STDERR_FILE = WEBSERVER_PATH + STDERR_FILE
  BACKUP_FILE = WEBSERVER_PATH + BACKUP_FILE
  SERVICE_VERIFICATION_FILE = WEBSERVER_PATH + SERVICE_VERIFICATION_FILE
  UPTIMES_FILE = WEBSERVER_PATH + UPTIMES_FILE
  CODE_HISTORY_FILE = WEBSERVER_PATH + CODE_HISTORY_FILE
  NEW_AIRCRAFT_FILE = WEBSERVER_PATH + NEW_AIRCRAFT_FILE


  HISTOGRAM_IMAGE_HTML = WEBSERVER_PATH + HISTOGRAM_IMAGE_HTML
  HOURLY_IMAGE_FILE = (
      WEBSERVER_PATH + WEBSERVER_IMAGE_RELATIVE_FOLDER + HOURLY_IMAGE_FILE)
  VERSION_REPOSITORY = WEBSERVER_PATH + VERSION_REPOSITORY

TIMEZONE = 'US/Pacific' # timezone of display
TZ = pytz.timezone(TIMEZONE)

# iata codes that we don't need to expand
KNOWN_AIRPORTS = ('SJC', 'SFO', 'OAK')

SPLITFLAP_CHARS_PER_LINE = 22
SPLITFLAP_LINE_COUNT = 6

DIRECTIONS_4 = ['N', 'E', 'S', 'W']
DIRECTIONS_8 = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW']
DIRECTIONS_16 = ['N', 'NNE', 'NE', 'ENE', 'E', 'ESE', 'SE', 'SSE',
                 'S', 'SSW', 'SW', 'WSW', 'W', 'WNW', 'NW', 'NNW']





                            <----SKIPPED LINES---->




AIRCRAFT_LENGTH['Cessna Citation Sovereign (twin-jet)'] = 19.35
AIRCRAFT_LENGTH['Cessna Citation V (twin-jet)'] = 14.91
AIRCRAFT_LENGTH['Cessna Citation X (twin-jet)'] = 22.04
AIRCRAFT_LENGTH['Cessna Citation Mustang (twin-jet)'] = 12.37
AIRCRAFT_LENGTH['Cessna Skyhawk (piston-single)'] = 8.28
AIRCRAFT_LENGTH['Cessna Skylane (piston-single)'] = 8.84
AIRCRAFT_LENGTH['Cessna T206 Turbo Stationair (piston-single)'] = 8.61
AIRCRAFT_LENGTH['Cirrus SR-22 (piston-single)'] = 7.92
AIRCRAFT_LENGTH['Dassault Falcon 900 (tri-jet)'] = 20.21
AIRCRAFT_LENGTH['Dassault Falcon 2000 (twin-jet)'] = 20.23
AIRCRAFT_LENGTH['Embraer 170/175 (twin-jet)'] = (29.90 + 31.68) / 2
AIRCRAFT_LENGTH['Embraer Phenom 300 (twin-jet)'] = 15.9
AIRCRAFT_LENGTH['Embraer ERJ-135 (twin-jet)'] = 26.33
AIRCRAFT_LENGTH['Embraer ERJ-145 (twin-jet)'] = 29.87
AIRCRAFT_LENGTH['Embraer Legacy 450 (twin-jet)'] = 19.69
AIRCRAFT_LENGTH['EMBRAER 175 (long wing) (twin-jet)'] = 31.68
AIRCRAFT_LENGTH['Eurocopter EC-635 (twin-turboshaft)'] = 10.21
AIRCRAFT_LENGTH['IAI Gulfstream G280 (twin-jet)'] = 20.3
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream G550 (twin-jet)'] = 29.39
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream IV (twin-jet)'] = 26.92

AIRCRAFT_LENGTH['Learjet 45 (twin-jet)'] = 17.68
AIRCRAFT_LENGTH['McDonnell Douglas MD-11 (tri-jet)'] = 61.6
AIRCRAFT_LENGTH['Pilatus PC-12 (single-turboprop)'] = 14.4


def Log(message, file=None, rolling=None):
  """Write a message to a logfile along with a timestamp.

  Args:
    message: string message to write
    file: string representing file name and, if needed, path to the
      file to write to
    rolling: name of file that will keep only the last n files of file
  """
  # can't define as a default parameter because LOGFILE name is potentially
  # modified based on SIMULATION flag
  if not file:
    file = LOGFILE

  # special case: for the main logfile, we always keep a rolling log




                            <----SKIPPED LINES---->




      for (n, flight) in enumerate(flights):
        if n/25 == int(n/25):
          print(' - %d' % n)
        CreateFlightInsights(
            flights[:n+1], configuration.get('insights', 'hide'), {})
        PickleObjectToFile(flight, tmp_f, False)

      if mtime == os.path.getmtime(f):
        shutil.move(tmp_f, f)
      else:
        print('Aborted: failed to bootstrap %s: file changed while in process'
              % full_path)
        return


def ResetLogs(config):
  """Clears the non-scrolling logs if reset_logs in config."""
  if 'reset_logs' in config:
    Log('Reset logs')
    for f in (
        STDERR_FILE, BACKUP_FILE, SERVICE_VERIFICATION_FILE, NEW_AIRCRAFT_FILE):

      if RemoveFile(f):
        open(f, 'a').close()
    config.pop('reset_logs')
    config = BuildSettings(config)
    WriteFile(CONFIG_FILE, config)
  return config


def CheckTemperature():
  """Turn on fan if temperature exceeds threshold."""








  if RASPBERRY_PI:
    temperature = gpiozero.CPUTemperature().temperature
    if temperature > TEMP_FAN_TURN_ON_CELSIUS:
      UpdateStatusLight(GPIO_FAN, True, 'Temperature: %.1f' % temperature)
    elif temperature < TEMP_FAN_TURN_OFF_CELSIUS:
      UpdateStatusLight(GPIO_FAN, False)











pin_values = {}  # caches last set value
def SetPinMode():
  """Initialize output GPIO pins for output on Raspberry Pi."""
  global pin_values

  if RASPBERRY_PI:
    RPi.GPIO.setmode(RPi.GPIO.BCM)

  pins = (
      GPIO_ERROR_VESTABOARD_CONNECTION, GPIO_ERROR_FLIGHT_AWARE_CONNECTION,
      GPIO_ERROR_ARDUINO_SERVO_CONNECTION, GPIO_ERROR_ARDUINO_REMOTE_CONNECTION,
      GPIO_ERROR_BATTERY_CHARGE, GPIO_FAN, GPIO_UNUSED_1, GPIO_UNUSED_2)

  for pin in pins:
    initial_state = pin[5]
    pin_values[pin[0]] = initial_state  # Initialize state of pins
    UpdateDashboard(initial_state, pin)





                            <----SKIPPED LINES---->




  # Next up to print is index 0; this is a list of tuples:
  # tuple element#1: flag indicating the type of message that this is
  # tuple element#2: the message itself
  message_queue = []
  next_message_time = time.time()

  # We repeat the loop every x seconds; this ensures that if the processing
  # time is long, we don't wait another x seconds after processing completes
  next_loop_time = time.time() + LOOP_DELAY_SECONDS

  # These files are read only if the version on disk has been modified more
  # recently than the last time it was read
  last_dump_json_timestamp = 0

  init_timing.append((time.time(), 7))
  WaitUntilKillComplete(already_running_ids)
  init_timing.append((time.time(), 8))

  personal_message = None  # Unknown what personal message is displayed



  LogTimes(init_timing)

  Log('Finishing initialization of %d; starting radio polling loop' %
      os.getpid())
  while ((not SIMULATION or SIMULATION_COUNTER < len(DUMP_JSONS))
         and not SHUTDOWN_SIGNAL):

    last_heartbeat_time = Heartbeat(last_heartbeat_time)

    new_configuration = ReadAndParseSettings(CONFIG_FILE)
    UpdateRollingLogSize(new_configuration)
    CheckForNewFilterCriteria(
        configuration, new_configuration, message_queue, flights)
    configuration = new_configuration

    ResetLogs(configuration)  # clear the logs if requested
    UpdateRollingLogSize(configuration)

    # if this is a SIMULATION, then process every diff dump. But if it
    # isn't a simulation, then only read & do related processing for the




                            <----SKIPPED LINES---->




    RemoveFile(HISTOGRAM_CONFIG_FILE)

    # We also need to make sure there are flights on which to generate a
    # histogram! Why might there not be any flights? Primarily during a
    # simulation, if there's a lingering histogram file at the time of
    # history restart.
    if histogram and not flights:
      Log('Histogram requested (%s) but no flights in memory' % histogram)
    if histogram and flights:
      message_queue.extend(TriggerHistograms(flights, histogram))
      if message_queue:  # Any personal message displayed has been cleared
        personal_message = None

    # check time & if appropriate, display next message from queue
    next_message_time = ManageMessageQueue(
        message_queue, next_message_time, configuration, screen_history)

    reboot = CheckRebootNeeded(
        startup_time, message_queue, json_desc_dict, configuration)

    CheckTemperature()

    if not SIMULATION:
      time.sleep(max(0, next_loop_time - time.time()))
      next_loop_time = time.time() + LOOP_DELAY_SECONDS
    else:
      SIMULATION_COUNTER += 1
      if simulation_slowdown:
        SimulationSlowdownNearFlight(flights, persistent_nearby_aircraft)

  if SIMULATION:
    SimulationEnd(message_queue, flights, screen_history)
  PerformGracefulShutdown(shutdown, reboot)


if __name__ == "__main__":
  #interrupt, as in ctrl-c
  signal.signal(signal.SIGINT, InterruptShutdownFromSignal)

  #terminate, when another instance found or via kill
  signal.signal(signal.SIGTERM, InterruptShutdownFromSignal)




                            <----SKIPPED LINES---->

                            <----SKIPPED LINES---->




FLAG_INSIGHT_FIRST_DEST = 6
FLAG_INSIGHT_FIRST_ORIGIN = 7
FLAG_INSIGHT_FIRST_AIRLINE = 8
FLAG_INSIGHT_FIRST_AIRCRAFT = 9
FLAG_INSIGHT_LONGEST_DELAY = 10
FLAG_INSIGHT_FLIGHT_DELAY_FREQUENCY = 11
FLAG_INSIGHT_FLIGHT_DELAY_TIME = 12
FLAG_INSIGHT_AIRLINE_DELAY_FREQUENCY = 13
FLAG_INSIGHT_AIRLINE_DELAY_TIME = 14
FLAG_INSIGHT_DESTINATION_DELAY_FREQUENCY = 15
FLAG_INSIGHT_DESTINATION_DELAY_TIME = 16
FLAG_INSIGHT_HOUR_DELAY_FREQUENCY = 17
FLAG_INSIGHT_HOUR_DELAY_TIME = 18
FLAG_INSIGHT_DATE_DELAY_FREQUENCY = 19
FLAG_INSIGHT_DATE_DELAY_TIME = 20
FLAG_INSIGHT_HELICOPTER = 21
INSIGHT_TYPES = 22

TEMP_FAN_TURN_ON_CELSIUS = 65
TEMP_FAN_TURN_OFF_CELSIUS = 55
TEMPERATURE_LOG_FREQUENCY_SECONDS = 30
TEMPERATURE_LOG = 'temp.csv'

# GPIO relay connections
# format: (GPIO pin, true message, false message, relay number,
# description, initial_state)
GPIO_ERROR_VESTABOARD_CONNECTION = (
    22,
    'ERROR: Vestaboard unavailable',
    'SUCCESS: Vestaboard available',
    1, 'Vestaboard connected', False)
GPIO_ERROR_FLIGHT_AWARE_CONNECTION = (
    23,
    'ERROR: FlightAware not available',
    'SUCCESS: FlightAware available',
    2, 'FlightAware connected', False)
GPIO_ERROR_ARDUINO_SERVO_CONNECTION = (
    24,
    'ERROR: Servos not running or lost connection',
    'SUCCESS: Handshake with servo Arduino received',
    3, 'Hemisphere connected', True)
GPIO_ERROR_ARDUINO_REMOTE_CONNECTION = (




                            <----SKIPPED LINES---->




if RASPBERRY_PI:
  PICKLE_FLIGHTS = MESSAGEBOARD_PATH + PICKLE_FLIGHTS
  PICKLE_DASHBOARD = MESSAGEBOARD_PATH + PICKLE_DASHBOARD
  LOGFILE = MESSAGEBOARD_PATH + LOGFILE
  PICKLE_DUMP_JSON_FILE = MESSAGEBOARD_PATH + PICKLE_DUMP_JSON_FILE
  PICKLE_FA_JSON_FILE = MESSAGEBOARD_PATH + PICKLE_FA_JSON_FILE
  PICKLE_SCREENS = MESSAGEBOARD_PATH + PICKLE_SCREENS
  CODE_REPOSITORY = MESSAGEBOARD_PATH

  HISTOGRAM_CONFIG_FILE = WEBSERVER_PATH + HISTOGRAM_CONFIG_FILE
  CONFIG_FILE = WEBSERVER_PATH + CONFIG_FILE
  ROLLING_MESSAGE_FILE = WEBSERVER_PATH + ROLLING_MESSAGE_FILE
  ALL_MESSAGE_FILE = WEBSERVER_PATH + ALL_MESSAGE_FILE
  ROLLING_LOGFILE = WEBSERVER_PATH + ROLLING_LOGFILE
  STDERR_FILE = WEBSERVER_PATH + STDERR_FILE
  BACKUP_FILE = WEBSERVER_PATH + BACKUP_FILE
  SERVICE_VERIFICATION_FILE = WEBSERVER_PATH + SERVICE_VERIFICATION_FILE
  UPTIMES_FILE = WEBSERVER_PATH + UPTIMES_FILE
  CODE_HISTORY_FILE = WEBSERVER_PATH + CODE_HISTORY_FILE
  NEW_AIRCRAFT_FILE = WEBSERVER_PATH + NEW_AIRCRAFT_FILE
  TEMPERATURE_LOG = WEBSERVER_PATH + TEMPERATURE_LOG

  HISTOGRAM_IMAGE_HTML = WEBSERVER_PATH + HISTOGRAM_IMAGE_HTML
  HOURLY_IMAGE_FILE = (
      WEBSERVER_PATH + WEBSERVER_IMAGE_RELATIVE_FOLDER + HOURLY_IMAGE_FILE)
  VERSION_REPOSITORY = WEBSERVER_PATH + VERSION_REPOSITORY

TIMEZONE = 'US/Pacific' # timezone of display
TZ = pytz.timezone(TIMEZONE)

# iata codes that we don't need to expand
KNOWN_AIRPORTS = ('SJC', 'SFO', 'OAK')

SPLITFLAP_CHARS_PER_LINE = 22
SPLITFLAP_LINE_COUNT = 6

DIRECTIONS_4 = ['N', 'E', 'S', 'W']
DIRECTIONS_8 = ['N', 'NE', 'E', 'SE', 'S', 'SW', 'W', 'NW']
DIRECTIONS_16 = ['N', 'NNE', 'NE', 'ENE', 'E', 'ESE', 'SE', 'SSE',
                 'S', 'SSW', 'SW', 'WSW', 'W', 'WNW', 'NW', 'NNW']





                            <----SKIPPED LINES---->




AIRCRAFT_LENGTH['Cessna Citation Sovereign (twin-jet)'] = 19.35
AIRCRAFT_LENGTH['Cessna Citation V (twin-jet)'] = 14.91
AIRCRAFT_LENGTH['Cessna Citation X (twin-jet)'] = 22.04
AIRCRAFT_LENGTH['Cessna Citation Mustang (twin-jet)'] = 12.37
AIRCRAFT_LENGTH['Cessna Skyhawk (piston-single)'] = 8.28
AIRCRAFT_LENGTH['Cessna Skylane (piston-single)'] = 8.84
AIRCRAFT_LENGTH['Cessna T206 Turbo Stationair (piston-single)'] = 8.61
AIRCRAFT_LENGTH['Cirrus SR-22 (piston-single)'] = 7.92
AIRCRAFT_LENGTH['Dassault Falcon 900 (tri-jet)'] = 20.21
AIRCRAFT_LENGTH['Dassault Falcon 2000 (twin-jet)'] = 20.23
AIRCRAFT_LENGTH['Embraer 170/175 (twin-jet)'] = (29.90 + 31.68) / 2
AIRCRAFT_LENGTH['Embraer Phenom 300 (twin-jet)'] = 15.9
AIRCRAFT_LENGTH['Embraer ERJ-135 (twin-jet)'] = 26.33
AIRCRAFT_LENGTH['Embraer ERJ-145 (twin-jet)'] = 29.87
AIRCRAFT_LENGTH['Embraer Legacy 450 (twin-jet)'] = 19.69
AIRCRAFT_LENGTH['EMBRAER 175 (long wing) (twin-jet)'] = 31.68
AIRCRAFT_LENGTH['Eurocopter EC-635 (twin-turboshaft)'] = 10.21
AIRCRAFT_LENGTH['IAI Gulfstream G280 (twin-jet)'] = 20.3
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream G550 (twin-jet)'] = 29.39
AIRCRAFT_LENGTH['Gulfstream Aerospace Gulfstream IV (twin-jet)'] = 26.92
AIRCRAFT_LENGTH['Learjet 35 (twin-jet)'] = 14.83
AIRCRAFT_LENGTH['Learjet 45 (twin-jet)'] = 17.68
AIRCRAFT_LENGTH['McDonnell Douglas MD-11 (tri-jet)'] = 61.6
AIRCRAFT_LENGTH['Pilatus PC-12 (single-turboprop)'] = 14.4


def Log(message, file=None, rolling=None):
  """Write a message to a logfile along with a timestamp.

  Args:
    message: string message to write
    file: string representing file name and, if needed, path to the
      file to write to
    rolling: name of file that will keep only the last n files of file
  """
  # can't define as a default parameter because LOGFILE name is potentially
  # modified based on SIMULATION flag
  if not file:
    file = LOGFILE

  # special case: for the main logfile, we always keep a rolling log




                            <----SKIPPED LINES---->




      for (n, flight) in enumerate(flights):
        if n/25 == int(n/25):
          print(' - %d' % n)
        CreateFlightInsights(
            flights[:n+1], configuration.get('insights', 'hide'), {})
        PickleObjectToFile(flight, tmp_f, False)

      if mtime == os.path.getmtime(f):
        shutil.move(tmp_f, f)
      else:
        print('Aborted: failed to bootstrap %s: file changed while in process'
              % full_path)
        return


def ResetLogs(config):
  """Clears the non-scrolling logs if reset_logs in config."""
  if 'reset_logs' in config:
    Log('Reset logs')
    for f in (
        STDERR_FILE, BACKUP_FILE, SERVICE_VERIFICATION_FILE,
        NEW_AIRCRAFT_FILE, TEMPERATURE_LOG):
      if RemoveFile(f):
        open(f, 'a').close()
    config.pop('reset_logs')
    config = BuildSettings(config)
    WriteFile(CONFIG_FILE, config)
  return config


def CheckTemperature(configuration, last_logged=0):
  """Turn on fan if temperature exceeds threshold.

  Args:
    configuration: dictionary of configuration settings.
    last_logged: epoch at which temperature was last logged.

  Returns:
    Epoch at which temperature was last logged.
  """
  if RASPBERRY_PI:
    temperature = gpiozero.CPUTemperature().temperature
    if temperature > TEMP_FAN_TURN_ON_CELSIUS:
      UpdateStatusLight(GPIO_FAN, True, 'Temperature: %.1f' % temperature)
    elif temperature < TEMP_FAN_TURN_OFF_CELSIUS:
      UpdateStatusLight(GPIO_FAN, False)

    now = time.time()
    if (configuration.get('log_temperature') and
        now - last_logged > TEMPERATURE_LOG_FREQUENCY_SECONDS):
      line = ','.join([str(now), str(temperature)])
      with open(TEMPERATURE_LOG, 'a') as f:
        f.write(line)
      last_logged = now
  return last_logged


pin_values = {}  # caches last set value
def SetPinMode():
  """Initialize output GPIO pins for output on Raspberry Pi."""
  global pin_values

  if RASPBERRY_PI:
    RPi.GPIO.setmode(RPi.GPIO.BCM)

  pins = (
      GPIO_ERROR_VESTABOARD_CONNECTION, GPIO_ERROR_FLIGHT_AWARE_CONNECTION,
      GPIO_ERROR_ARDUINO_SERVO_CONNECTION, GPIO_ERROR_ARDUINO_REMOTE_CONNECTION,
      GPIO_ERROR_BATTERY_CHARGE, GPIO_FAN, GPIO_UNUSED_1, GPIO_UNUSED_2)

  for pin in pins:
    initial_state = pin[5]
    pin_values[pin[0]] = initial_state  # Initialize state of pins
    UpdateDashboard(initial_state, pin)





                            <----SKIPPED LINES---->




  # Next up to print is index 0; this is a list of tuples:
  # tuple element#1: flag indicating the type of message that this is
  # tuple element#2: the message itself
  message_queue = []
  next_message_time = time.time()

  # We repeat the loop every x seconds; this ensures that if the processing
  # time is long, we don't wait another x seconds after processing completes
  next_loop_time = time.time() + LOOP_DELAY_SECONDS

  # These files are read only if the version on disk has been modified more
  # recently than the last time it was read
  last_dump_json_timestamp = 0

  init_timing.append((time.time(), 7))
  WaitUntilKillComplete(already_running_ids)
  init_timing.append((time.time(), 8))

  personal_message = None  # Unknown what personal message is displayed

  temp_last_logged = 0  # Keeps track of when temperature was last logged

  LogTimes(init_timing)

  Log('Finishing initialization of %d; starting radio polling loop' %
      os.getpid())
  while ((not SIMULATION or SIMULATION_COUNTER < len(DUMP_JSONS))
         and not SHUTDOWN_SIGNAL):

    last_heartbeat_time = Heartbeat(last_heartbeat_time)

    new_configuration = ReadAndParseSettings(CONFIG_FILE)
    UpdateRollingLogSize(new_configuration)
    CheckForNewFilterCriteria(
        configuration, new_configuration, message_queue, flights)
    configuration = new_configuration

    ResetLogs(configuration)  # clear the logs if requested
    UpdateRollingLogSize(configuration)

    # if this is a SIMULATION, then process every diff dump. But if it
    # isn't a simulation, then only read & do related processing for the




                            <----SKIPPED LINES---->




    RemoveFile(HISTOGRAM_CONFIG_FILE)

    # We also need to make sure there are flights on which to generate a
    # histogram! Why might there not be any flights? Primarily during a
    # simulation, if there's a lingering histogram file at the time of
    # history restart.
    if histogram and not flights:
      Log('Histogram requested (%s) but no flights in memory' % histogram)
    if histogram and flights:
      message_queue.extend(TriggerHistograms(flights, histogram))
      if message_queue:  # Any personal message displayed has been cleared
        personal_message = None

    # check time & if appropriate, display next message from queue
    next_message_time = ManageMessageQueue(
        message_queue, next_message_time, configuration, screen_history)

    reboot = CheckRebootNeeded(
        startup_time, message_queue, json_desc_dict, configuration)

    temp_last_logged = CheckTemperature(configuration, temp_last_logged)

    if not SIMULATION:
      time.sleep(max(0, next_loop_time - time.time()))
      next_loop_time = time.time() + LOOP_DELAY_SECONDS
    else:
      SIMULATION_COUNTER += 1
      if simulation_slowdown:
        SimulationSlowdownNearFlight(flights, persistent_nearby_aircraft)

  if SIMULATION:
    SimulationEnd(message_queue, flights, screen_history)
  PerformGracefulShutdown(shutdown, reboot)


if __name__ == "__main__":
  #interrupt, as in ctrl-c
  signal.signal(signal.SIGINT, InterruptShutdownFromSignal)

  #terminate, when another instance found or via kill
  signal.signal(signal.SIGTERM, InterruptShutdownFromSignal)




                            <----SKIPPED LINES---->