Python Script to search for Beluga XL in the south of Hamburg

opensky.py

const TOKEN_REFRESH_MARGIN = 30;
let token = null;
let expiresAt = null;

const getToken = async () => {
  if (token && expiresAt && Date.now() < expiresAt) return token;

  return await refreshToken();
};

const refreshToken = async () => {
  const req = await fetch(
    'https://auth.opensky-network.org/auth/realms/opensky-network/protocol/openid-connect/token',
    {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
      },
      body: new URLSearchParams({
        grant_type: 'client_credentials',
        client_id: '', // move this to env
        client_secret: '', // move this to env
      }),
    },
  );

  const res = await req.json();

  token = res.access_token;
  const expiresIn = Date.now() + res.expires_in * 1000;
  expiresAt = Date.now() + (expiresIn - TOKEN_REFRESH_MARGIN) * 1000;
  return token;
};

const getFlight = async (icao24) => {
  const url = new URL('https://opensky-network.org/api/states/all');
  url.searchParams.set('icao24', icao24.join(','));
  url.searchParams.set('lamin', '51.12145'); // don't hard code this
  url.searchParams.set('lomin', '5.32383'); // don't hard code this
  url.searchParams.set('lamax', '53.75903'); // don't hard code this
  url.searchParams.set('lomax', '10.31003'); // don't hard code this

  const t = await getToken();
  const req = await fetch(url, {
    headers: {
      Authorization: `Bearer ${t}`,
    },
  });

  const res = await req.json();
  const states = res.states.map((state) => {
    return {
      icao24: state[0],
      callsign: state[1].trim(),
      origin_country: state[2],
      time_position: state[3],
      last_contact: state[4],
      longitude: state[5],
      latitude: state[6],
      baro_altitude: state[7],
      on_ground: state[8],
      velocity: state[9],
      true_track: state[10],
      vertical_rate: state[11],
      sensors: state[12],
      geo_altitude: state[13],
      squawk: state[14],
      spi: state[15],
      position_source: state[16],
    };
  });

  return {
    rateLimitRemaining: req.headers.get('X-Rate-Limit-Remaining'),
    time: res.time,
    states,
  };
};

// make this an endpoint with parameters for icao24, and call it from the frontend
// beluga xl 3: 395d68
// beluga xl 4: 395d69
// beluga xl 6: 395d6e
await getFlight(['395d68', '395d69', '395d6e']);