immich/mobile/lib/providers/asset_viewer/video_player_controls_provider.dart

import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:immich_mobile/providers/asset_viewer/video_player_value_provider.dart';

class VideoPlaybackControls {
  const VideoPlaybackControls({required this.position, required this.pause, this.restarted = false});

  final Duration position;
  final bool pause;
  final bool restarted;
}

final videoPlayerControlsProvider = StateNotifierProvider<VideoPlayerControls, VideoPlaybackControls>((ref) {
  return VideoPlayerControls(ref);
});

const videoPlayerControlsDefault = VideoPlaybackControls(position: Duration.zero, pause: false);

class VideoPlayerControls extends StateNotifier<VideoPlaybackControls> {
  VideoPlayerControls(this.ref) : super(videoPlayerControlsDefault);

  final Ref ref;

  VideoPlaybackControls get value => state;

  set value(VideoPlaybackControls value) {
    state = value;
  }

  void reset() {
    state = videoPlayerControlsDefault;
  }

  Duration get position => state.position;
  bool get paused => state.pause;

  set position(Duration value) {
    if (state.position == value) {
      return;
    }

    state = VideoPlaybackControls(position: value, pause: state.pause);
  }

  void pause() {
    if (state.pause) {
      return;
    }

    state = VideoPlaybackControls(position: state.position, pause: true);
  }

  void play() {
    if (!state.pause) {
      return;
    }

    state = VideoPlaybackControls(position: state.position, pause: false);
  }

  void togglePlay() {
    state = VideoPlaybackControls(position: state.position, pause: !state.pause);
  }

  void restart() {
    state = const VideoPlaybackControls(position: Duration.zero, pause: false, restarted: true);
    ref.read(videoPlaybackValueProvider.notifier).value = ref
        .read(videoPlaybackValueProvider.notifier)
        .value
        .copyWith(state: VideoPlaybackState.playing, position: Duration.zero);
  }
}