ADSB

server/airtraffic.mjs

@@ -0,0 +1,49 @@
+import { cfg }       from './config.mjs'
+import { writeFile, readFile, existsSync } from 'fs'
+import { resolve, dirname } from 'path'
+import { fileURLToPath }    from 'url'
+
+const DIR        = dirname(fileURLToPath(import.meta.url))
+const SHAPES_PATH = resolve(DIR, 'shapes.json')
+
+export async function getShapes() {
+	if (existsSync(SHAPES_PATH)) {
+		return JSON.parse(await readFile(SHAPES_PATH, 'utf8'))
+	}
+
+	const r    = await fetch('https://raw.githubusercontent.com/wiedehopf/tar1090/master/html/markers.min.js')
+	const text = await r.text()
+
+	// tar1090 exposes a var with all the shape definitions
+	let shapes = {}
+	try {
+		const match = text.match(/var\s+_aircraft_markers\s*=\s*(\{[\s\S]*?\});/)
+		if (match) shapes = JSON.parse(match[1])
+	} catch (e) {
+		console.error('Failed to parse tar1090 shapes:', e)
+	}
+
+	writeFile(SHAPES_PATH, JSON.stringify(shapes), () => {})
+	return shapes
+}
+
+export async function getAirTraffic() {
+	const { ADSB_URL } = cfg()
+	if (!ADSB_URL) return { data: [] }
+	const r = await fetch(`${ADSB_URL}/re-api/?all`)
+	const j = await r.json()
+	return { data: j.aircraft || [] }
+}
+
+export async function getAirTrafficHistory(icao) {
+	const { ADSB_URL } = cfg()
+	if (!ADSB_URL) return { history: [] }
+	const r = await fetch(`${ADSB_URL}/re-api/?trace&icao=${icao}`)
+	const j = await r.json()
+	const history = (j.trace || []).map(t => ({
+		latitude:  t[1],
+		longitude: t[2],
+		altitude:  t[3] || 0,
+	}))
+	return { history }
+}