spotube/lib/services/audio_player/audio_players_streams_mixin.dart

part of 'audio_player.dart';

mixin SpotubeAudioPlayersStreams on AudioPlayerInterface {
  // stream getters
  Stream<Duration> get durationStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.streams.duration.asBroadcastStream();
    } else {
      return _justAudio!.durationStream
          .where((event) => event != null)
          .map((event) => event!)
          .asBroadcastStream();
    }
  }

  Stream<Duration> get positionStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.streams.position.asBroadcastStream();
    } else {
      return _justAudio!.positionStream.asBroadcastStream();
    }
  }

  Stream<Duration> get bufferedPositionStream {
    if (mkSupportedPlatform) {
      // audioplayers doesn't have the capability to get buffered position
      return _mkPlayer!.streams.buffer.asBroadcastStream();
    } else {
      return _justAudio!.bufferedPositionStream.asBroadcastStream();
    }
  }

  Stream<void> get completedStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.streams.completed.asBroadcastStream();
    } else {
      return _justAudio!.playerStateStream
          .where(
              (event) => event.processingState == ja.ProcessingState.completed)
          .asBroadcastStream();
    }
  }

  /// Stream that emits when the player is almost (%) complete
  Stream<int> percentCompletedStream(double percent) {
    return positionStream
        .asyncMap(
          (position) async => (await duration)?.inSeconds == 0
              ? 0
              : (position.inSeconds /
                      ((await duration)?.inSeconds ?? 100) *
                      100)
                  .toInt(),
        )
        .where((event) => event >= percent)
        .asBroadcastStream();
  }

  Stream<bool> get playingStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.streams.playing.asBroadcastStream();
    } else {
      return _justAudio!.playingStream.asBroadcastStream();
    }
  }

  Stream<bool> get shuffledStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.shuffleStream.asBroadcastStream();
    } else {
      return _justAudio!.shuffleModeEnabledStream.asBroadcastStream();
    }
  }

  Stream<PlaybackLoopMode> get loopModeStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.loopModeStream
          .map(PlaybackLoopMode.fromPlaylistMode)
          .asBroadcastStream();
    } else {
      return _justAudio!.loopModeStream
          .map(PlaybackLoopMode.fromLoopMode)
          .asBroadcastStream();
    }
  }

  Stream<double> get volumeStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.streams.volume
          .map((event) => event / 100)
          .asBroadcastStream();
    } else {
      return _justAudio!.volumeStream.asBroadcastStream();
    }
  }

  Stream<bool> get bufferingStream {
    if (mkSupportedPlatform) {
      return Stream.value(false).asBroadcastStream();
    } else {
      return _justAudio!.playerStateStream
          .map(
            (event) =>
                event.processingState == ja.ProcessingState.buffering ||
                event.processingState == ja.ProcessingState.loading,
          )
          .asBroadcastStream();
    }
  }

  Stream<AudioPlaybackState> get playerStateStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.playerStateStream.asBroadcastStream();
    } else {
      return _justAudio!.playerStateStream
          .map(AudioPlaybackState.fromJaPlayerState)
          .asBroadcastStream();
    }
  }

  Stream<int> get currentIndexChangedStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.indexChangeStream;
    } else {
      return _justAudio!.sequenceStateStream
          .map((event) => event?.currentIndex ?? -1)
          .asBroadcastStream();
    }
  }

  Stream<String> get activeSourceChangedStream {
    if (mkSupportedPlatform) {
      return _mkPlayer!.indexChangeStream
          .map((event) {
            return _mkPlayer!.playlist.medias.elementAtOrNull(event)?.uri;
          })
          .where((event) => event != null)
          .cast<String>();
    } else {
      return _justAudio!.sequenceStateStream
          .map((event) {
            return (event?.currentSource as ja.UriAudioSource?)?.uri.toString();
          })
          .where((event) => event != null)
          .cast<String>();
    }
  }
}