Update to new face search API

lib/db/file_db.dart

@@ -114,13 +114,14 @@ class FileDB {
     return _convertToFiles(results);
   }
 
-  Future<List<File>> getAllInFolder(int folderId, int offset, int limit) async {
+  Future<List<File>> getAllInFolder(
+      int folderId, int sinceUpdationTime, int limit) async {
     final db = await instance.database;
     final results = await db.query(
       table,
       where:
-          '$columnRemoteFolderId = ? AND $columnIsDeleted = 0 OFFSET ? LIMIT ?',
-      whereArgs: [folderId, offset, limit],
+          '$columnRemoteFolderId = ? AND $columnIsDeleted = 0 AND $columnUpdationTime > ? LIMIT ?',
+      whereArgs: [folderId, sinceUpdationTime, limit],
       orderBy: '$columnCreationTime DESC',
     );
     return _convertToFiles(results);

lib/face_search_manager.dart

@@ -29,7 +29,7 @@ class FaceSearchManager {
   }
 
   Future<List<File>> getFaceSearchResults(
-      Face face, int offset, int limit) async {
+      Face face, int sinceTime, int limit) async {
     final result = await _dio
         .get(
       Configuration.instance.getHttpEndpoint() +
@@ -37,7 +37,7 @@ class FaceSearchManager {
           face.faceID.toString(),
       queryParameters: {
         "limit": limit,
-        "offset": offset,
+        "sinceTime": sinceTime,
       },
       options:
           Options(headers: {"X-Auth-Token": Configuration.instance.getToken()}),

lib/ui/face_search_results_page.dart

@@ -15,8 +15,9 @@ class FaceSearchResultsPage extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     var gallery = Gallery(
-      asyncLoader: (offset, limit) =>
-          _faceSearchManager.getFaceSearchResults(face, offset, limit),
+      asyncLoader: (sinceFile, limit) =>
+          _faceSearchManager.getFaceSearchResults(
+              face, sinceFile == null ? 0 : sinceFile.updationTime, limit),
       tagPrefix: "face_search_results",
       selectedFiles: selectedFiles,
     );

lib/ui/gallery.dart

@@ -16,7 +16,7 @@ import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 class Gallery extends StatefulWidget {
   final List<File> Function() syncLoader;
-  final Future<List<File>> Function(int offset, int limit) asyncLoader;
+  final Future<List<File>> Function(File file, int limit) asyncLoader;
   // TODO: Verify why the event is necessary when calling loader post onRefresh
   // should have done the job.
   final Stream<Event> reloadEvent;
@@ -82,7 +82,7 @@ class _GalleryState extends State<Gallery> {
       return _onDataLoaded();
     }
     return FutureBuilder<List<File>>(
-      future: widget.asyncLoader(0, kLoadLimit),
+      future: widget.asyncLoader(null, kLoadLimit),
       builder: (context, snapshot) {
         if (snapshot.hasData) {
           _requiresLoad = false;
@@ -160,14 +160,15 @@ class _GalleryState extends State<Gallery> {
 
   void _loadNextItems() {
     _isLoadingNext = true;
-    widget.asyncLoader(_files.length, 100).then((files) {
+    widget.asyncLoader(_files[_files.length - 1], kLoadLimit).then((files) {
       setState(() {
         _isLoadingNext = false;
         _saveScrollPosition();
-        if (files.length == 0) {
+        if (files.length < kLoadLimit) {
           _hasLoadedAll = true;
+        } else {
+          _files.addAll(files);
         }
-        _files.addAll(files);
       });
     });
   }

lib/ui/remote_folder_page.dart

@@ -21,8 +21,10 @@ class _RemoteFolderPageState extends State<RemoteFolderPage> {
   @override
   Widget build(Object context) {
     var gallery = Gallery(
-      asyncLoader: (offset, limit) =>
-          FileDB.instance.getAllInFolder(widget.folder.id, offset, limit),
+      asyncLoader: (sinceFile, limit) => FileDB.instance.getAllInFolder(
+          widget.folder.id,
+          sinceFile == null ? 0 : sinceFile.updationTime,
+          limit),
       onRefresh: () => FolderSharingService.instance.syncDiff(widget.folder),
       tagPrefix: "remote_folder",
       selectedFiles: _selectedFiles,