spotube/lib/provider/volume_provider.dart

import 'dart:async';

import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:spotube/services/audio_player/audio_player.dart';
import 'package:spotube/services/kv_store/kv_store.dart';

class VolumeProvider extends Notifier<double> {
  VolumeProvider();

  @override
  build() {
    audioPlayer.setVolume(KVStoreService().volume);
    return KVStoreService().volume;
  }

  Future<void> setVolume(double volume) async {
    state = volume;
    await audioPlayer.setVolume(volume);
    await KVStoreService().setVolume(volume);
  }
}

final volumeProvider = NotifierProvider<VolumeProvider, double>(() {
  return VolumeProvider();
});