waylume_server/lib/supabase_heartbeat.dart

// Run a heartbeat to let supabase know that the client is still active.

import 'dart:io';
import 'dart:isolate';
import 'dart:math';

import 'package:supabase/supabase.dart';
import 'package:waylume_server/main.dart';

void initHeartbeat() {

  // Run this on a separate thread.
  Isolate.spawn((_) async {

    // To avoid server deadlock
    await Future.delayed(Duration(seconds: Random().nextInt(5)));

    while (true) {
      DateTime now = DateTime.now().toUtc();

      await SUPABASE_CLIENT
          .from("waylume_servers")
          .update({ "last_heartbeat": now.toIso8601String() })
          .eq("id", fromEnivronment("SERVER_ID")!);

      print("Heartbeat sent to Supabase at ${now.toIso8601String()}");

      // Wait 30 seconds before sending the next heartbeat
      await Future.delayed(Duration(seconds: 30));
    }

  }, null);

}