chore: change get-data exports

export a function for the specific opensky data, re-org code

src/lib/get-data.mjs

@@ -1,6 +1,25 @@
 import fetch from './fetch.mjs';
 
-export default async function getData() {
-  const res = await fetch.get('/states/all');
-  return res.data.states;
+const positionSourceMap = ['ADS-B', 'ASTERIX', 'MLAT'];
+
+export async function getOpenskyData() {
+  const res = await fetch.get(`https://opensky-network.org/api/states/all`);
+  return res.data.states.map(rec => ({
+    transponder: `${rec[0]}`.toLowerCase(),
+    callsign: `${rec[1]}`.trim(),
+    origin_country: rec[2],
+    time_position: new Date(rec[3] * 1000),
+    last_contact: new Date(rec[4] * 1000),
+    location: rec[5] && rec[6] ? `${rec[6]},${rec[5]}` : null,
+    lat: rec[6],
+    lon: rec[5],
+    baro_altitude: rec[7],
+    geo_altitude: rec[13],
+    on_ground: rec[8],
+    velocity: rec[9],
+    vertical_rate: rec[11],
+    squawk: rec[14],
+    spi: rec[15],
+    position_source: positionSourceMap[rec[16]],
+  }));
 }