def receive(self, message):
"""implement ITelemetryObject"""
self.__last_heard_time = message.receive_time
for fact in message.facts:
if isinstance(fact, KillObject):
# Kill by pretending the object is ancient.
self.__last_heard_time = 0
if isinstance(fact, Position):
self.__track = self.__track._replace(
latitude=TelemetryItem(fact.latitude, message.receive_time),
longitude=TelemetryItem(fact.longitude, message.receive_time),
)
if isinstance(fact, Altitude):
conversion = _FEET_TO_METERS if fact.feet_not_meters else 1
self.__track = self.__track._replace(
altitude=TelemetryItem(fact.value * conversion, message.receive_time),
)
if isinstance(fact, Velocity):
self.__track = self.__track._replace(
h_speed=TelemetryItem(fact.speed_knots * _KNOTS_TO_METERS_PER_SECOND, message.receive_time),
track_angle=TelemetryItem(fact.course_degrees, message.receive_time),
)
elif isinstance(fact, Status):
# TODO: Empirically, not always ASCII. Move this implicit decoding off into parse stages.
self.__status = unicode(fact.text)
elif isinstance(fact, Symbol):
self.__symbol = unicode(fact.id)
else:
# TODO: Warn somewhere in this case (recognized by parser but not here)
pass
self.__last_comment = unicode(message.comment)
if len(message.errors) > 0:
self.__last_parse_error = '; '.join(message.errors)
self.state_changed()
def test_track(self):
self.assertEqual(empty_track, self.s.get_track())
self.s.receive(self.__message([Position(31, -42)]))
self.assertEqual(
empty_track._replace(
latitude=TelemetryItem(31, _dummy_receive_time),
longitude=TelemetryItem(-42, _dummy_receive_time),
), self.s.get_track())
def get_track(self):
if self.__grid:
latitude, longitude = grid_to_lat_long(self.__grid)
track = Track(latitude=TelemetryItem(latitude, self.__last_heard),
longitude=TelemetryItem(longitude,
self.__last_heard))
return track
else:
return empty_track
def test_init_from_partial_json(self):
self.assertEquals(
empty_track._replace(
latitude=TelemetryItem(1, 1000),
longitude=TelemetryItem(2, 1000)),
Track({
u'latitude': {u'value': 1, u'timestamp': 1000},
u'longitude': {u'value': 2, u'timestamp': 1000},
}))
def __init__(self, latitude, longitude):
self.__track = empty_track._replace(
latitude=TelemetryItem(float(latitude), None),
longitude=TelemetryItem(float(longitude), None))
def receive(self, message_wrapper):
message = message_wrapper.message
cpr_decoder = message_wrapper.cpr_decoder
receive_time = message_wrapper.receive_time
self.__last_heard_time = receive_time
# Unfortunately, gr-air-modes doesn't provide a function to implement this gunk -- imitating its output_flightgear code which
data = message.data
t = data.get_type()
if t == 0:
self.__track = self.__track._replace(altitude=TelemetryItem(
air_modes.decode_alt(data['ac'], True) *
_METERS_PER_FEET, receive_time))
# TODO more info available here
elif t == 4:
self.__track = self.__track._replace(altitude=TelemetryItem(
air_modes.decode_alt(data['ac'], True) *
_METERS_PER_FEET, receive_time))
# TODO more info available here
elif t == 5:
self.__ident = air_modes.decode_id(data['id'])
# TODO more info available here
elif t == 17: # ADS-B
bdsreg = data['me'].get_type()
if bdsreg == 0x05:
# TODO use unused info
(altitude_feet, latitude, longitude, _range,
_bearing) = air_modes.parseBDS05(data, cpr_decoder)
self.__track = self.__track._replace(
altitude=TelemetryItem(altitude_feet * _METERS_PER_FEET,
receive_time),
latitude=TelemetryItem(latitude, receive_time),
longitude=TelemetryItem(longitude, receive_time),
)
elif bdsreg == 0x06:
# TODO use unused info
(_ground_track, latitude, longitude, _range,
_bearing) = air_modes.parseBDS06(data, cpr_decoder)
self.__track = self.__track._replace(
latitude=TelemetryItem(latitude, receive_time),
longitude=TelemetryItem(longitude, receive_time),
)
elif bdsreg == 0x08:
(self.__call,
self.__aircraft_type) = air_modes.parseBDS08(data)
elif bdsreg == 0x09:
subtype = data['bds09'].get_type()
if subtype == 0:
(velocity, heading, vertical_speed,
_turn_rate) = air_modes.parseBDS09_0(data)
# TODO: note we're stuffing the heading in as track angle. Is there something better to do?
self.__track = self.__track._replace(
h_speed=TelemetryItem(
velocity * _KNOTS_TO_METERS_PER_SECOND,
receive_time),
heading=TelemetryItem(heading, receive_time),
track_angle=TelemetryItem(heading, receive_time),
v_speed=TelemetryItem(vertical_speed, receive_time),
# TODO add turn rate
)
elif subtype == 1:
(velocity, heading,
vertical_speed) = air_modes.parseBDS09_1(data)
self.__track = self.__track._replace(
h_speed=TelemetryItem(
velocity * _KNOTS_TO_METERS_PER_SECOND,
receive_time),
heading=TelemetryItem(heading, receive_time),
track_angle=TelemetryItem(heading, receive_time),
v_speed=TelemetryItem(vertical_speed, receive_time),
# TODO reset turn rate?
)
else:
# TODO report
pass
else:
# TODO report
pass
else:
# TODO report
pass
self.state_changed()