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https://github.com/OpenSquawk/OpenSquawk
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- NormalizedTelemetry carries lat/lon (0/0 no-GPS guard, position in the change-detection signature) so the backend can derive distance triggers - bridge polling moves from setInterval to a Worker tick: with the sim in the foreground the /live-atc tab is backgrounded and Chrome throttles plain intervals to ~1/min — telemetry-driven ATC lagged behind the silence fallback Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
49 lines
2.3 KiB
TypeScript
49 lines
2.3 KiB
TypeScript
import type { NormalizedTelemetry } from '../../app/composables/useRadioBackend'
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export function normalizeSimFreq(value: unknown): string | null {
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const num = typeof value === 'number' ? value : Number(value)
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if (!Number.isFinite(num) || num < 118 || num >= 137) return null
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return num.toFixed(3)
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}
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// Map the raw bridge telemetry (SimConnect-style field names) to the
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// sim-agnostic contract the backend understands. The raw lat/lon position is
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// forwarded so the backend can derive distance_to_dep_nm / distance_to_dest_nm
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// (it has the airport coordinates via the session's ICAO codes); heading is
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// currently true (bridge only reports true) — magnetic correction is needed
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// before any localizer/heading trigger can rely on it.
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export function normalizeBridgeTelemetry(raw: any): NormalizedTelemetry | null {
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if (!raw || typeof raw !== 'object') return null
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const num = (v: unknown): number | undefined => {
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const n = typeof v === 'number' ? v : Number(v)
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return Number.isFinite(n) ? n : undefined
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}
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const lat = num(raw.PLANE_LATITUDE)
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const lon = num(raw.PLANE_LONGITUDE)
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// 0/0 is the bridge's "no GPS data" default — don't forward it as a position.
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const hasPosition =
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lat !== undefined && lon !== undefined && (Math.abs(lat) > 0.1 || Math.abs(lon) > 0.1)
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return {
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altitude_ft: num(raw.PLANE_ALTITUDE),
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ias_kts: num(raw.AIRSPEED_INDICATED),
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gs_kts: num(raw.GROUND_VELOCITY),
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vs_fpm: num(raw.VERTICAL_SPEED),
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heading_deg: num(raw.PLANE_HEADING_DEGREES_TRUE),
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on_ground: typeof raw.SIM_ON_GROUND === 'boolean' ? raw.SIM_ON_GROUND : undefined,
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...(hasPosition ? { lat, lon } : {}),
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}
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}
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// Only forward telemetry that meaningfully changed, so idle cruise doesn't POST
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// an identical tick every poll. Rounded so tiny jitter doesn't count as change.
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// Position rounds at ~0.01° (≈0.6 nm) so a moving aircraft keeps ticking the
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// backend's distance triggers without spamming while parked.
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export function telemetrySignature(t: NormalizedTelemetry): string {
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const r = (v: number | undefined, step: number) => (v === undefined ? '_' : Math.round(v / step))
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return [
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r(t.altitude_ft, 100), r(t.ias_kts, 5), r(t.gs_kts, 5),
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r(t.vs_fpm, 100), r(t.heading_deg, 5), t.on_ground ? 'G' : 'A',
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r(t.lat, 0.01), r(t.lon, 0.01),
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].join('|')
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}
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