Method syncApiTimer

server/src/datasource.ts:204–214

* The supplement timer should only run when the radio is primary — it exists * to keep landing aircraft alive when local ADS-B drops them. When the API is * itself the primary source, `tick()` already polls it, so a second timer just * doubles the request rate into airplanes.live's rate lim

()

   * disappearing and reappearing" in #15). Reconcile it against the live source.
   */
  private syncApiTimer(): void {
    const want = this.o.source === "radio" && this.o.supplementApi;
    if (want && !this.apiTimer && this.timer) {
      void this.refreshApi();
      this.apiTimer = setInterval(() => void this.refreshApi(), this.o.apiPollMs);
    } else if (!want && this.apiTimer) {
      clearInterval(this.apiTimer);
      this.apiTimer = null;
      this.lastApi = [];
    }
  }

  private async fetchList(source: DataSource, now: number): Promise<Aircraft[] | null> {
    const url = source === "radio" ? this.o.getConfig().radioUrl : this.buildApiUrl();