selectMultipleFromList static method

List<int> selectMultipleFromList(String title, List<String> options)

Displays a list of options and prompts the user to select multiple.

Returns a list of selected indices. The title is displayed as the list heading.

Implementation

static List<int> selectMultipleFromList(String title, List<String> options) {
  print('');
  print('$bold$blue$title$reset');
  print(
      '$dim(Enter comma-separated numbers, e.g: 1,2,3 — or press Enter for all)$reset');
  for (int i = 0; i < options.length; i++) {
    print('  $cyan${i + 1}$reset. ${options[i]}');
  }
  print('');

  while (true) {
    final input = prompt('Selection');
    if (input == null || input.isEmpty) {
      return List.generate(options.length, (i) => i);
    }
    final parts = input.split(',').map((e) => e.trim()).toList();
    final indices = <int>[];
    bool valid = true;
    for (final p in parts) {
      final num = int.tryParse(p);
      if (num == null || num < 1 || num > options.length) {
        valid = false;
        break;
      }
      indices.add(num - 1);
    }
    if (valid && indices.isNotEmpty) return indices;
    error('Invalid input. Please enter valid numbers separated by commas.');
  }
}