mini_plist_parser.dart

/// Parses a plist file into a Dart object.
dynamic parsePlist(String plist) {
  final tokens = RegExp(r'(\s+|<[!?].*?>)|<(/?\w+)[^>]*>|([^<]*)', dotAll: true)
      .allMatches(plist)
      .where((match) => match[1] == null)
      .map((match) => match[2] != null ? (1, match[2]!) : (2, match[3]!))
      .followedBy([(0, '')]).iterator
    ..moveNext();

  bool at(String s) => tokens.current == (1, s) && tokens.moveNext();

  bool expect(String s) => at(s) || (throw 'Expected <$s>, got ${tokens.current}');

  T andExpect<T>(T Function() f, String s) {
    final result = f();
    expect(s);
    return result;
  }

  String text() {
    final (t, s) = tokens.current;
    if (t != 2) throw 'Expected text, got ${tokens.current}';
    tokens.moveNext();
    return s.replaceAll('&amp;', '&').replaceAll('&lt;', '<');
  }

  dynamic parse() {
    if (at('dict')) {
      return andExpect(() => <String, dynamic>{for (; at('key');) andExpect(text, '/key'): parse()}, '/dict');
    } else if (at('array')) {
      return <dynamic>[for (; !at('/array');) parse()];
    } else if (at('string')) {
      return at('/string') ? '' : andExpect(text, '/string');
    } else {
      throw 'Expected dict, array or string, got ${tokens.current}';
    }
  }

  expect('plist');
  return andExpect(parse, '/plist');
}