refactor(mobile): services and providers (#9232)

* refactor(mobile): services and provider

* providers

mobile/lib/providers/asset_viewer/video_player_value_provider.dart

@@ -0,0 +1,92 @@
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:video_player/video_player.dart';
+
+enum VideoPlaybackState {
+  initializing,
+  paused,
+  playing,
+  buffering,
+  completed,
+}
+
+class VideoPlaybackValue {
+  /// The current position of the video
+  final Duration position;
+
+  /// The total duration of the video
+  final Duration duration;
+
+  /// The current state of the video playback
+  final VideoPlaybackState state;
+
+  /// The volume of the video
+  final double volume;
+
+  VideoPlaybackValue({
+    required this.position,
+    required this.duration,
+    required this.state,
+    required this.volume,
+  });
+
+  factory VideoPlaybackValue.fromController(VideoPlayerController? controller) {
+    final video = controller?.value;
+    late VideoPlaybackState s;
+    if (video == null) {
+      s = VideoPlaybackState.initializing;
+    } else if (video.isCompleted) {
+      s = VideoPlaybackState.completed;
+    } else if (video.isPlaying) {
+      s = VideoPlaybackState.playing;
+    } else if (video.isBuffering) {
+      s = VideoPlaybackState.buffering;
+    } else {
+      s = VideoPlaybackState.paused;
+    }
+
+    return VideoPlaybackValue(
+      position: video?.position ?? Duration.zero,
+      duration: video?.duration ?? Duration.zero,
+      state: s,
+      volume: video?.volume ?? 0.0,
+    );
+  }
+
+  factory VideoPlaybackValue.uninitialized() {
+    return VideoPlaybackValue(
+      position: Duration.zero,
+      duration: Duration.zero,
+      state: VideoPlaybackState.initializing,
+      volume: 0.0,
+    );
+  }
+}
+
+final videoPlaybackValueProvider =
+    StateNotifierProvider<VideoPlaybackValueState, VideoPlaybackValue>((ref) {
+  return VideoPlaybackValueState(ref);
+});
+
+class VideoPlaybackValueState extends StateNotifier<VideoPlaybackValue> {
+  VideoPlaybackValueState(this.ref)
+      : super(
+          VideoPlaybackValue.uninitialized(),
+        );
+
+  final Ref ref;
+
+  VideoPlaybackValue get value => state;
+
+  set value(VideoPlaybackValue value) {
+    state = value;
+  }
+
+  set position(Duration value) {
+    state = VideoPlaybackValue(
+      position: value,
+      duration: state.duration,
+      state: state.state,
+      volume: state.volume,
+    );
+  }
+}