realtime_client 2.4.0

Listens to changes in a PostgreSQL Database and via websockets. This is for usage with Supabase Realtime server.

example/main.dart

import 'package:realtime_client/realtime_client.dart';

/// Example to use with Supabase Realtime https://supabase.io/
Future<void> main() async {
  final socket = RealtimeClient(
    'ws://SUPABASE_API_ENDPOINT/realtime/v1',
    params: {'apikey': 'SUPABSE_API_KEY'},
    // ignore: avoid_print
    logger: (kind, msg, data) => {print('$kind $msg $data')},
  );

  final channel = socket.channel('realtime:public');
  channel.onPostgresChanges(
    event: PostgresChangeEvent.all,
    filter: PostgresChangeFilter(
      type: PostgresChangeFilterType.eq,
      column: 'column',
      value: 'value',
    ),
    callback: (payload) {},
  );
  channel.onPostgresChanges(
      event: PostgresChangeEvent.delete,
      schema: 'public',
      callback: (payload) {
        print('channel delete payload: ${payload.toString()}');
      });
  channel.onPostgresChanges(
      event: PostgresChangeEvent.insert,
      schema: 'public',
      callback: (payload) {
        print('channel insert payload: ${payload.toString()}');
      });

  socket.onMessage((message) => print('MESSAGE $message'));

  // on connect and subscribe
  socket.connect();
  channel.subscribe((a, [_]) => print('SUBSCRIBED'));

  // delay 20s to receive events from server
  await Future.delayed(const Duration(seconds: 20));

  // on unsubscribe and disconnect
  channel.unsubscribe();
  socket.disconnect();
}