actOnId method

Future<List<String>> actOnId(String id, CrudAction action, { String? newValue, String persistKey = 'defaultPersistKey', })

Performs a CRUD action on persisted data.

• id: Identifier for the data item to act upon.
• action: Action to perform (delete or update).
• newValue: Optional new value for update action.
• persistKey: Key to use for persistence (default is 'defaultPersistKey').

Implementation

Future<List<String>> actOnId(String id, CrudAction action, {String? newValue, String persistKey = 'defaultPersistKey'}) async {
  if (_socketConfig.persistStream) {
    _prefs ??= await SharedPreferences.getInstance();
    List<String> items = _prefs?.getStringList(persistKey) ?? [];

    switch (action) {
      case CrudAction.delete:
        items.removeWhere((item) => item.contains(id));
        break;
      case CrudAction.update:
        if (newValue != null) {
          int index = items.indexWhere((item) => item.contains(id));
          if (index != -1) {
            items[index] = newValue;
          }
        }
        break;
      default:
        throw ArgumentError('Invalid action: $action');
    }

    await _prefs?.setStringList(persistKey, items);
    return items;
  }
  return [];
}