RhythmBox/lib/services/server/active_sourced_track.dart

import 'package:get/get.dart';
import 'package:rhythm_box/providers/audio_player.dart';
import 'package:rhythm_box/services/audio_player/audio_player.dart';
import 'package:rhythm_box/services/sourced_track/models/source_info.dart';
import 'package:rhythm_box/services/sourced_track/sourced_track.dart';

class ActiveSourcedTrackProvider extends GetxController {
  Rx<SourcedTrack?> state = Rx(null);

  void updateTrack(SourcedTrack? sourcedTrack) {
    state.value = sourcedTrack;
  }

  Future<void> populateSibling() async {
    if (state.value == null) return;
    state.value = await state.value!.copyWithSibling();
  }

  Future<void> swapSibling(SourceInfo sibling) async {
    if (state.value == null) return;
    await populateSibling();
    final newTrack = await state.value!.swapWithSibling(sibling);
    if (newTrack == null) return;

    state.value = newTrack;
    await audioPlayer.pause();

    final playback = Get.find<AudioPlayerProvider>();
    final oldActiveIndex = audioPlayer.currentIndex;

    await playback.addTracksAtFirst([newTrack]);
    await Future.delayed(const Duration(milliseconds: 300));
    await playback.jumpToTrack(newTrack);

    await audioPlayer.removeTrack(oldActiveIndex);

    await audioPlayer.resume();
  }
}