eatvio_app/lib/core/websockets/ws_manager.dart

import 'dart:developer';

import 'package:dart_pusher_channels/dart_pusher_channels.dart';
import 'package:eatvio_app/core/const.dart';
import 'package:eatvio_app/core/websockets/ws_service.dart';
import 'package:eatvio_app/core/token_storage.dart';

class WsManager {
  final WsService wsService;

  WsManager({required this.wsService});

  PusherChannelsClient? client;
  int? userId;

  PrivateChannel? _privateNotificationChannel;
  PrivateChannel? _privateMessagesChannel;
  PrivateChannel? _privateDirectChatChannel;

  Stream<ChannelReadEvent>? get newMessagesStream => _privateMessagesChannel?.bind('App\\Events\\ChatMessageUpdated');

  Stream<ChannelReadEvent>? get newNotificationsStream => _privateNotificationChannel?.bind('Illuminate\\Notifications\\Events\\BroadcastNotificationCreated');

  Stream<ChannelReadEvent>? get directChatStream => _privateDirectChatChannel?.bind('App\\Events\\ChatMessageUpdated');

  Stream<ChannelReadEvent>? get clientTypingStream => _privateDirectChatChannel?.bind('client-typing');

  Future<void> initialize() async {
    if (client == null) {
      try {
        await TokenStorage.haveTokenInStorage();
        final wsUrl = await wsService.getWebsocket();

        final options = PusherChannelsOptions.fromHost(
          scheme: 'wss',
          key: wsUrl.key,
          host: wsUrl.host,
          shouldSupplyMetadataQueries: true,
          metadata: const PusherChannelsOptionsMetadata.byDefault(),
          port: 443,
        );
        client = PusherChannelsClient.websocket(
          options: options,
          connectionErrorHandler: (exception, trace, refresh) {
            refresh();
          },
          minimumReconnectDelayDuration: const Duration(
            seconds: 1,
          ),
          defaultActivityDuration: const Duration(
            seconds: 30,
          ),
          waitForPongDuration: const Duration(
            seconds: 30,
          ),
        );

        await client?.connect();

        client = client;
        userId = wsUrl.userId;

        await _initPrivateNotificationsChannel();
        await _initPrivateMessagesChannel();

        client?.lifecycleStream.listen((data) {
          if (data == PusherChannelsClientLifeCycleState.establishedConnection) {
            _unsubscribe();
            _subscribe();
          }
        });
        client?.eventStream.listen((event) {
          log(event.rootObject.toString());
        });
        _subscribe();
      } catch (e, st) {
        log(e.toString(), stackTrace: st);
      }
    }
  }

  Future<void> _initPrivateNotificationsChannel() async {
    final token = await TokenStorage.getTokenFromStorage();
    _privateNotificationChannel = client?.privateChannel(
      '$newNotificationsChannelName.$userId',
      authorizationDelegate: EndpointAuthorizableChannelTokenAuthorizationDelegate.forPrivateChannel(
        authorizationEndpoint: Uri.parse('$baseUrl/broadcasting/auth'),
        headers: {
          'Authorization': 'Bearer $token',
        },
      ),
    );
  }

  Future<void> _initPrivateMessagesChannel() async {
    final token = await TokenStorage.getTokenFromStorage();
    _privateMessagesChannel = client?.privateChannel(
      '$newMessagesChannelName.$userId',
      authorizationDelegate: EndpointAuthorizableChannelTokenAuthorizationDelegate.forPrivateChannel(
        authorizationEndpoint: Uri.parse('$baseUrl/broadcasting/auth'),
        headers: {
          'Authorization': 'Bearer $token',
        },
      ),
    );
  }

  Future<void> initPrivateDirectChatChannel(String chatId) async {
    final token = await TokenStorage.getTokenFromStorage();
    _privateDirectChatChannel = client?.privateChannel(
      '$directChatChannelName.$chatId',
      authorizationDelegate: EndpointAuthorizableChannelTokenAuthorizationDelegate.forPrivateChannel(
        authorizationEndpoint: Uri.parse('$baseUrl/broadcasting/auth'),
        headers: {
          'Authorization': 'Bearer $token',
        },
      ),
    );
  }

  void _subscribe() {
    _privateMessagesChannel?.subscribe();
    _privateNotificationChannel?.subscribe();
  }

  void _unsubscribe() {
    _privateMessagesChannel?.unsubscribe();
    _privateNotificationChannel?.unsubscribe();
  }

  void subscribeDirectChatChannel() {
    _privateDirectChatChannel?.subscribe();
  }

  void unsubscribeDirectChatChannel() {
    _privateDirectChatChannel?.unsubscribe();
  }

  Future<void> clear() async{
    await client?.disconnect();
    client = null;
    userId = null;
    _privateDirectChatChannel?.unsubscribe();
    _privateMessagesChannel?.unsubscribe();
    _privateNotificationChannel?.unsubscribe();
    _privateDirectChatChannel = null;
    _privateMessagesChannel = null;
    _privateNotificationChannel = null;
  }
}