actually refactor whoel filter affair

lib/src/users/users_bloc.dart

@@ -119,23 +119,17 @@ class UsersBloc extends Bloc<UsersEvent, UsersState> {
       }
     });
 
-    on<FilterUsers>((FilterUsers event, Emitter<UsersState> emit) async {
+    on<Filter>((Filter event, Emitter<UsersState> emit) async {
       final f = simple(event.query);
-      _filteredList = _users
-          .where((User user) => simple(user.toMap.values.toString()).contains(f))
-          .toList()
-        ..sort((User a, User b) => f == a.name ? -1 : 0);
-
-      emit(UsersState.result(_filteredList));
-    });
+      if (f.isEmpty) {
+        _filteredList = _users;
+      } else {
+        _filteredList =
+            _users.where((User user) => simple(user.toMap.values.toString()).contains(f)).toList()
+              ..sort((User a, User b) => f == a.name ? -1 : 0)
+              ..sort((User a, User b) => f == a.email ? -1 : 0);
+      }
 
-    on<FilterAll>((FilterAll event, Emitter<UsersState> emit) async {
-      final f = event.filter.toLowerCase();
-      _filteredList = _users
-          .where((User user) =>
-              user.name.toLowerCase().contains(f) ||
-              (user.card?.toString() ?? '').toLowerCase().contains(f))
-          .toList();
       emit(UsersState.result(_filteredList));
     });
   }
@@ -149,9 +143,7 @@ class UsersBloc extends Bloc<UsersEvent, UsersState> {
   void onCreateUser(String name, String password, {int card, int pin}) =>
       add(CreateUser(name, password, card: card, pin: pin));
 
-  void onFilter(String filter) => add(FilterAll(filter));
-
-  void onFilterByUser(String query) => add(FilterUsers(query));
+  void onFilter(String query) => add(Filter(query));
 
   void onGetCredit(int userId) => add(GetCredit(userId));
 

lib/src/users/users_events.dart

@@ -21,26 +21,15 @@ class CreateUser extends UsersEvent {
   String toString() => '[CreateUser ${removePassword(toMap)}]';
 }
 
-class FilterAll extends UsersEvent {
-  final String filter;
-
-  FilterAll(this.filter);
-
-  Map<String, dynamic> get toMap => {'filter': filter};
-
-  @override
-  String toString() => '[FilterAll $toMap]';
-}
-
-class FilterUsers extends UsersEvent {
+class Filter extends UsersEvent {
   final String query;
 
-  FilterUsers(this.query);
+  Filter(this.query);
 
   Map<String, dynamic> get toMap => {'query': query};
 
   @override
-  String toString() => '[FilterUsers $toMap]';
+  String toString() => '[Filter $toMap]';
 }
 
 class GetCredit extends UsersEvent {