def _make_flight_observation(
flight: rid.RIDFlight,
view: s2sphere.LatLngRect) -> observation_api.Flight:
paths: List[List[observation_api.Position]] = []
current_path: List[observation_api.Position] = []
previous_position: Optional[observation_api.Position] = None
lat_min = view.lat_lo().degrees
lat_max = view.lat_hi().degrees
lng_min = view.lng_lo().degrees
lng_max = view.lng_hi().degrees
# Decompose recent positions into a list of contiguous paths
for p in flight.recent_positions:
lat = p.position.lat
lng = p.position.lng
position_report = observation_api.Position(lat=lat,
lng=lng,
alt=p.position.alt)
inside_view = lat_min <= lat <= lat_max and lng_min <= lng <= lng_max
if inside_view:
# This point is inside the view
if not current_path and previous_position:
# Positions were previously outside the view but this one is in
current_path.append(previous_position)
current_path.append(position_report)
else:
# This point is outside the view
if current_path:
# Positions were previously inside the view but this one is out
current_path.append(position_report)
paths.append(current_path)
current_path = []
previous_position = position_report
if current_path:
paths.append(current_path)
return observation_api.Flight(
id=flight.id,
most_recent_position=observation_api.Position(
lat=flight.current_state.position.lat,
lng=flight.current_state.position.lng,
alt=flight.current_state.position.alt),
recent_paths=[observation_api.Path(positions=path) for path in paths])
def _make_api_flight(flight: injection_api.TestFlight,
sp_behavior: behavior.ServiceProviderBehavior,
dp_behavior: behavior.DisplayProviderBehavior,
t_earliest: datetime.datetime, t_now: datetime.datetime,
lat_min: float, lng_min: float, lat_max: float,
lng_max: float) -> observation_api.Flight:
"""Extract the currently-relevant information from a TestFlight.
:param flight: TestFlight with telemetry for all time
:param t_earliest: The time before which telemetry should be ignored
:param t_now: The time after which telemetry should be ignored
:return: Flight information currently visible in the remote ID system
"""
paths: List[List[observation_api.Position]] = []
current_path: List[observation_api.Position] = []
previous_position: Optional[observation_api.Position] = None
most_recent_position: Optional[Tuple[datetime.datetime,
observation_api.Position]] = None
for telemetry in flight.telemetry:
t = iso8601.parse_date(telemetry.timestamp)
if t < t_earliest:
# Not relevant; telemetry more than 60s in the past
continue
if t > t_now:
# Not yet relevant; will occur in the future
continue
lat = telemetry.position.lat
lng = telemetry.position.lng
alt = telemetry.position.alt
# Mangle data on the Service Provider side
if sp_behavior.use_agl_instead_of_wgs84_for_altitude:
if 'height' in telemetry and telemetry.height.reference == 'TakeoffLocation':
alt = telemetry.height.distance
else:
alt -= flight.telemetry[0].position.alt
if sp_behavior.use_feet_instead_of_meters_for_altitude:
alt /= 0.3048
position_report = _make_position_report(lat, lng, alt, sp_behavior,
dp_behavior)
inside_view = lat_min <= lat <= lat_max and lng_min <= lng <= lng_max
if inside_view:
# This is a relevant point inside the view
if not current_path and previous_position:
# Positions were previously outside the view but this one is in
current_path.append(previous_position)
current_path.append(position_report)
if most_recent_position is None or most_recent_position[0] < t:
most_recent_position = (t, position_report)
else:
# This point is in the relevant time range but outside the view
if current_path:
# Positions were previously inside the view but this one is out
current_path.append(position_report)
paths.append(current_path)
current_path = []
previous_position = position_report
if current_path:
paths.append(current_path)
kwargs = {'id': flight.get_id(t_now)}
if paths and not dp_behavior.always_omit_recent_paths:
kwargs['recent_paths'] = [
observation_api.Path(positions=p) for p in paths
]
if most_recent_position:
kwargs['most_recent_position'] = most_recent_position[1]
return observation_api.Flight(**kwargs)