noverachat_dart 0.7.0

Headless NoveraChat client core for Dart & Flutter — WebSocket + REST with optimistic UI, reconnection, and backfill. Pure client logic (events as Streams, sends as Futures); bring your own UI.

example/example.dart

// Minimal end-to-end example: connect → listen → send → disconnect.
//
// This is a plain Dart script (no Flutter). Run it from the package root:
//
//   dart run example/example.dart
//
// It needs a running NoveraChat backend and a per-user JWT. Supply them via
// environment variables so nothing secret lives in the source:
//
//   NOVERACHAT_ENDPOINT=https://chat.example.com \
//   NOVERACHAT_APP_ID=app_9f8k2x \
//   NOVERACHAT_TOKEN=<a per-user JWT from YOUR backend> \
//   NOVERACHAT_ROOM=room_123 \
//   dart run example/example.dart
//
// In a real app you never hard-code the token: `tokenProvider` fetches a fresh
// JWT from your backend on connect and on every reconnect. Here we read one
// from the environment just to keep the example runnable.

import 'dart:io';

import 'package:noverachat_dart/noverachat_dart.dart';

Future<void> main() async {
  final endpoint = Platform.environment['NOVERACHAT_ENDPOINT'];
  final appId = Platform.environment['NOVERACHAT_APP_ID'];
  final token = Platform.environment['NOVERACHAT_TOKEN'];
  final roomId = Platform.environment['NOVERACHAT_ROOM'] ?? 'room_123';

  if (endpoint == null || appId == null || token == null) {
    stderr.writeln(
      'Set NOVERACHAT_ENDPOINT, NOVERACHAT_APP_ID and NOVERACHAT_TOKEN '
      '(and optionally NOVERACHAT_ROOM) before running this example.',
    );
    exitCode = 64; // EX_USAGE
    return;
  }

  final chat = NoveraChat(ClientOptions(
    appId: appId,
    endpoint: endpoint,
    // In production this calls YOUR backend to mint a short-lived per-user JWT.
    tokenProvider: () async => token,
    // Optional: surface WS + REST + state transitions through one sink.
    logger: (level, message, [ctx]) => print('[$level] $message'),
  ));

  await chat.connect();
  print('connected');

  final room = chat.room(roomId);

  // Inbound messages from other users arrive on a broadcast Stream.
  // Subscribe before you send so you don't miss anything.
  final sub = room.onMessage.listen((msg) {
    print('← ${msg.senderId}: ${msg.content}');
  });

  // Optimistic send: `send` returns immediately with a temp id; `messageId`
  // completes once the server acks with the real Snowflake id.
  final sent = room.send('hello from the Dart example');
  final messageId = await sent.messageId;
  print('→ sent, server id = $messageId');

  // Mark our own last-read position (debounced, monotonic).
  room.markRead(messageId);

  // Keep the socket open briefly to observe any inbound traffic, then clean up.
  await Future<void>.delayed(const Duration(seconds: 5));

  await sub.cancel();
  await chat.disconnect();
  print('disconnected');
}