sort controller added

Author: Arpit-Sahu

lib/controller/file_manager_controller.dart

@@ -31,6 +31,14 @@ class FileManagerController extends ChangeNotifier {
     return willNotGoToParent;
   }
 
+  List<FileSystemEntity> sort(SortBy sort, List<FileSystemEntity> entitys) {
+    if (sort == SortBy.name) {
+      entitys
+          .sort((a, b) => a.path.toLowerCase().compareTo(b.path.toLowerCase()));
+      return entitys;
+    } else if (sort == SortBy.date) {}
+  }
+
   /// Open directory by providing Directory.
   void openDirectory(FileSystemEntity entity) {
     if (entity is Directory) {