wip: bloc for files

lib/state/app/modules/files/bloc/files_bloc.dart

@@ -0,0 +1,65 @@
+
+import 'dart:developer';
+
+import '../../../infrastructure/utilityWidgets/loadableHydratedBloc/loadable_hydrated_bloc.dart';
+import '../../../infrastructure/utilityWidgets/loadableHydratedBloc/loadable_hydrated_bloc_event.dart';
+import '../repository/files_repository.dart';
+import 'files_event.dart';
+import 'files_state.dart';
+
+class FilesBloc extends LoadableHydratedBloc<FilesEvent, FilesState, FilesRepository> {
+  static const String basePath = '/';
+
+  FilesBloc() {
+    add(Emit((state) => state.copyWith(currentFolder: basePath)));
+    on<EnterFolder>((event, emit) {
+      add(Emit((state) {
+        log('setFolder');
+        return state.copyWith(currentFolder: event.absolutePath);
+      }, fetch: true));
+    });
+  }
+
+  List<File>? getVisibleFiles() => innerState?.files[innerState?.currentFolder];
+  String getCurrentFolder() => innerState?.currentFolder ?? basePath;
+  String getCurrentFolderName() {
+    var folder = innerState?.currentFolder.split('/').reversed.elementAt(1);
+    return folder!.isEmpty ? 'Dateien' : folder;
+  }
+  bool canGoBack() => innerState?.currentFolder != basePath;
+  String goBackLocation() {
+    var pathSegments = innerState?.currentFolder.split(basePath) ?? [];
+    if (pathSegments.isNotEmpty) {
+      pathSegments.removeLast();
+      pathSegments.removeLast();
+    }
+    return pathSegments.join(basePath) + basePath;
+  }
+
+  @override
+  FilesState fromNothing() => const FilesState(currentFolder: basePath, files: {});
+
+  @override
+  FilesState fromStorage(Map<String, dynamic> json) => FilesState.fromJson(json);
+
+  @override
+  Future<void> gatherData() async {
+    var fetchFolder = getCurrentFolder();
+    log(fetchFolder);
+    var files = await repo.getFileList(fetchFolder);
+    var newFileMap = Map.of(innerState?.files ?? <String, List<File>>{});
+    newFileMap[fetchFolder] = files;
+    if(fetchFolder != getCurrentFolder()) {
+      log('Fetch aborted due to folder change (expected "$fetchFolder" got "${getCurrentFolder()}")');
+      return;
+    }
+    add(DataGathered((state) => state.copyWith(files: newFileMap)));
+  }
+
+  @override
+  FilesRepository repository() => FilesRepository();
+
+  @override
+  Map<String, dynamic>? toStorage(FilesState state) => state.toJson();
+
+}