spotube/lib/provider/connect/connect.dart

import 'dart:convert';

import 'package:catcher_2/catcher_2.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:spotify/spotify.dart';
import 'package:spotube/models/connect/connect.dart';
import 'package:spotube/provider/connect/clients.dart';
import 'package:spotube/provider/proxy_playlist/proxy_playlist.dart';
import 'package:spotube/services/audio_player/loop_mode.dart';
import 'package:web_socket_channel/web_socket_channel.dart';
import 'package:web_socket_channel/status.dart' as status;

final playingProvider = StateProvider<bool>(
  (ref) => false,
);

final positionProvider = StateProvider<Duration>(
  (ref) => Duration.zero,
);

final durationProvider = StateProvider<Duration>(
  (ref) => Duration.zero,
);

final shuffleProvider = StateProvider<bool>(
  (ref) => false,
);

final loopModeProvider = StateProvider<PlaybackLoopMode>(
  (ref) => PlaybackLoopMode.none,
);

final queueProvider = StateProvider<ProxyPlaylist>(
  (ref) => ProxyPlaylist({}),
);

final volumeProvider = StateProvider<double>(
  (ref) => 1.0,
);

class ConnectNotifier extends AsyncNotifier<WebSocketChannel?> {
  @override
  build() async {
    try {
      final connectClients = ref.watch(connectClientsProvider);
      print('Building ConnectNotifier');

      if (connectClients.asData?.value.resolvedService == null) return null;

      final service = connectClients.asData!.value.resolvedService!;

      print(
          'Connecting to ${service.name}: ws://${service.host}:${service.port}/ws');

      final channel = WebSocketChannel.connect(
        Uri.parse('ws://${service.host}:${service.port}/ws'),
      );

      await channel.ready;

      print(
          'Connected to ${service.name}: ws://${service.host}:${service.port}/ws');

      final subscription = channel.stream.listen(
        (message) {
          final event =
              WebSocketEvent.fromJson(jsonDecode(message), (data) => data);

          event.onQueue((event) {
            ref.read(queueProvider.notifier).state = event.data;
          });

          event.onPlaying((event) {
            ref.read(playingProvider.notifier).state = event.data;
          });

          event.onPosition((event) {
            ref.read(positionProvider.notifier).state = event.data;
          });

          event.onDuration((event) {
            ref.read(durationProvider.notifier).state = event.data;
          });

          event.onShuffle((event) {
            ref.read(shuffleProvider.notifier).state = event.data;
          });

          event.onLoop((event) {
            ref.read(loopModeProvider.notifier).state = event.data;
          });

          event.onVolume((event) {
            ref.read(volumeProvider.notifier).state = event.data;
          });
        },
        onError: (error) {
          Catcher2.reportCheckedError(
            error,
            StackTrace.current,
          );
        },
      );

      ref.onDispose(() {
        subscription.cancel();
        channel.sink.close(status.goingAway);
      });

      return channel;
    } catch (e, stack) {
      Catcher2.reportCheckedError(e, stack);
      rethrow;
    }
  }

  Future<void> emit(Object message) async {
    if (state.value == null) return;
    state.value?.sink.add(
      message is String ? message : (message as dynamic).toJson(),
    );
  }

  Future<void> resume() async {
    emit(WebSocketResumeEvent());
  }

  Future<void> pause() async {
    emit(WebSocketPauseEvent());
  }

  Future<void> stop() async {
    emit(WebSocketStopEvent());
  }

  Future<void> jumpTo(int position) async {
    emit(WebSocketJumpEvent(position));
  }

  Future<void> load(WebSocketLoadEventData data) async {
    emit(WebSocketLoadEvent(data));
  }

  Future<void> next() async {
    emit(WebSocketNextEvent());
  }

  Future<void> previous() async {
    emit(WebSocketPreviousEvent());
  }

  Future<void> seek(Duration position) async {
    emit(WebSocketSeekEvent(position));
  }

  Future<void> setShuffle(bool value) async {
    emit(WebSocketShuffleEvent(value));
  }

  Future<void> setLoopMode(PlaybackLoopMode value) async {
    emit(WebSocketLoopEvent(value));
  }

  Future<void> addTrack(Track data) async {
    emit(WebSocketAddTrackEvent(data));
  }

  Future<void> removeTrack(String data) async {
    emit(WebSocketRemoveTrackEvent(data));
  }

  Future<void> reorder(ReorderData data) async {
    emit(WebSocketReorderEvent(data));
  }

  Future<void> setVolume(double value) async {
    emit(WebSocketVolumeEvent(value));
  }
}

final connectProvider =
    AsyncNotifierProvider<ConnectNotifier, WebSocketChannel?>(
  () => ConnectNotifier(),
);