Future<void> loadFromXML() async {
    try {
      //emit(const ComponentsState.loading());
      final File file = File('katalog.xml');
      final String content = file.readAsStringSync();
      final XmlDocument doc = XmlDocument.parse(content);
      final laptopsNode = doc.findAllElements('laptop').toList();

      List<TextEditingController> controllers = [];
      List<String> lines = [];

      for (var laptop in laptopsNode) {
        String s = '';
        s += laptop.findElements('manufacturer').first.text;
        s += ';';
        s += laptop.findAllElements('size').first.text;
        s += ';';
        s += laptop.findAllElements('resolution').first.text;
        s += ';';
        s += laptop.findAllElements('type').first.text;
        s += ';';
        s += laptop.findAllElements('screen').first.getAttribute('touch')!;
        s += ';';
        s += laptop.findAllElements('procesor').first.getElement('name')!.text;
        s += ';';
        s += laptop.findAllElements('physical_cores').first.text;
        s += ';';
        s += laptop.findAllElements('clock_speed').first.text;
        s += ';';
        s += laptop.findAllElements('ram').first.text;
        s += ';';
        s += laptop.findAllElements('storage').first.text;
        s += ';';
        s += laptop.findAllElements('disc').first.getAttribute('type')!;
        s += ';';
        s += laptop
            .findAllElements('graphic_card')
            .first
            .getElement('name')!
            .text;
        s += ';';
        s += laptop.findAllElements('memory').first.text;
        s += ';';
        s += laptop.findAllElements('os').first.text;
        s += ';';
        s += laptop.findAllElements('disc_reader').first.text;

        lines.add(s);
      }

      for (var line in lines) {
        if (!line.contains(';')) {
          throw Exception();
        }
        var tab = line.split(';');

        for (var c in tab) {
          controllers.add(
            TextEditingController(
                text: c.trim().isNotEmpty ? c : 'brak danych'),
          );
        }
      }

      emit(ComponentsState.loaded(
        componentsList: lines,
        controllers: controllers,
      ));
    } catch (error) {
      log('Error while loading data', error: error);
      emit(const ComponentsState.initial());
    }
  }
}