fix: source preview file as videoplayer's input

mobile/lib/ui/viewer/file/preview_video_widget.dart

@@ -28,14 +28,16 @@ class PreviewVideoWidget extends StatefulWidget {
   final bool? autoPlay;
   final String? tagPrefix;
   final Function(bool)? playbackCallback;
+  final File preview;
 
   const PreviewVideoWidget(
     this.file, {
+    required this.preview,
     this.autoPlay = false,
     this.tagPrefix,
     this.playbackCallback,
-    Key? key,
-  }) : super(key: key);
+    super.key,
+  });
 
   @override
   State<PreviewVideoWidget> createState() => _PreviewVideoWidgetState();
@@ -54,31 +56,8 @@ class _PreviewVideoWidgetState extends State<PreviewVideoWidget> {
   @override
   void initState() {
     super.initState();
-    if (widget.file.isRemoteFile) {
-      _loadNetworkVideo();
-      _setFileSizeIfNull();
-    } else if (widget.file.isSharedMediaToAppSandbox) {
-      final localFile = File(getSharedMediaFilePath(widget.file));
-      if (localFile.existsSync()) {
-        _logger.fine("loading from app cache");
-        _setVideoPlayerController(file: localFile);
-      } else if (widget.file.uploadedFileID != null) {
-        _loadNetworkVideo();
-      }
-    } else {
-      widget.file.getAsset.then((asset) async {
-        if (asset == null || !(await asset.exists)) {
-          if (widget.file.uploadedFileID != null) {
-            _loadNetworkVideo();
-          }
-        } else {
-          // ignore: unawaited_futures
-          asset.getMediaUrl().then((url) {
-            _setVideoPlayerController(url: url);
-          });
-        }
-      });
-    }
+
+    _setVideoPlayerController();
     _fileSwipeLockEventSubscription =
         Bus.instance.on<GuestViewEvent>().listen((event) {
       setState(() {
@@ -141,7 +120,6 @@ class _PreviewVideoWidgetState extends State<PreviewVideoWidget> {
   }
 
   void _setVideoPlayerController({
-    String? url,
     File? file,
   }) {
     if (!mounted) {
@@ -151,11 +129,7 @@ class _PreviewVideoWidgetState extends State<PreviewVideoWidget> {
       return;
     }
     VideoPlayerController videoPlayerController;
-    if (url != null) {
-      videoPlayerController = VideoPlayerController.networkUrl(Uri.parse(url));
-    } else {
-      videoPlayerController = VideoPlayerController.file(file!);
-    }
+    videoPlayerController = VideoPlayerController.file(file ?? widget.preview);
 
     debugPrint("videoPlayerController: $videoPlayerController");
     _videoPlayerController = videoPlayerController

mobile/lib/ui/viewer/file/video_view_widget.dart

@@ -13,6 +13,7 @@ import "package:photos/core/event_bus.dart";
 import "package:photos/generated/l10n.dart";
 import 'package:photos/models/file/file.dart';
 import "package:photos/service_locator.dart";
+import "package:photos/services/preview_video_store.dart";
 import "package:photos/ui/actions/file/file_actions.dart";
 import "package:photos/ui/viewer/file/preview_video_widget.dart";
 import 'package:photos/ui/viewer/file/thumbnail_widget.dart';
@@ -56,9 +57,7 @@ class _VideoViewWidgetState extends State<VideoViewWidget> {
 
   void _checkForPreview() {
     if (!flagService.internalUser) return;
-    getPreviewFileFromServer(
-      widget.file,
-    ).then((file) {
+    PreviewVideoStore.instance.getPlaylist(widget.file).then((file) {
       if (!mounted) return;
       if (file != null) {
         isCheckingForPreview = false;
@@ -96,6 +95,7 @@ class _VideoViewWidgetState extends State<VideoViewWidget> {
       if (previewFile != null) {
         return PreviewVideoWidget(
           widget.file,
+          preview: previewFile!,
           tagPrefix: widget.tagPrefix,
           playbackCallback: widget.playbackCallback,
         );

mobile/lib/utils/file_util.dart

@@ -130,45 +130,6 @@ void removeCallBack(EnteFile file) {
   }
 }
 
-Future<File?> getPreviewFileFromServer(
-  EnteFile file, {
-  ProgressCallback? progressCallback,
-}) async {
-  final cacheManager = DefaultCacheManager();
-  final fileFromCache = await cacheManager.getFileFromCache(file.downloadUrl);
-  if (fileFromCache != null) {
-    return fileFromCache.file;
-  }
-  final downloadID = file.uploadedFileID.toString();
-
-  if (progressCallback != null) {
-    _progressCallbacks[downloadID] = progressCallback;
-  }
-
-  if (!_fileDownloadsInProgress.containsKey(downloadID)) {
-    final completer = Completer<File?>();
-    _fileDownloadsInProgress[downloadID] = completer.future;
-
-    Future<File?> downloadFuture;
-
-    downloadFuture = _downloadAndCache(
-      file,
-      cacheManager,
-      progressCallback: (count, total) {
-        _progressCallbacks[downloadID]?.call(count, total);
-      },
-    );
-
-    // ignore: unawaited_futures
-    downloadFuture.then((downloadedFile) async {
-      completer.complete(downloadedFile);
-      await _fileDownloadsInProgress.remove(downloadID);
-      _progressCallbacks.remove(downloadID);
-    });
-  }
-  return _fileDownloadsInProgress[downloadID];
-}
-
 Future<File?> getFileFromServer(
   EnteFile file, {
   ProgressCallback? progressCallback,