regexpToFunction function

MatchFunction regexpToFunction(RegExp re, List<Key> keys, String decode(String?, dynamic))

Implementation

MatchFunction regexpToFunction(
  RegExp re,
  List<Key> keys,
  String Function(String?, dynamic) decode,
  // options: RegexpToFunctionOptions = {}
) {
  // final { decode = (x: string) => x } = options;

  return (String pathname) {
    final m = re.firstMatch(pathname);
    if (m == null) {
      return null;
    }

    // final { 0: path, index } = m;

    final path = m.group(0)!;
    final index = m.start;

    final params = {};

    for (int i = 1; i < m.groupCount; i++) {
      // tslint:disable-next-line
      if (m[i] == null) {
        continue;
      }

      final key = keys[i - 1];

      if (key.modifier == '*' || key.modifier == '+') {
        params[key.name] = m[i]?.split(key.prefix + key.suffix).map((value) {
          return decode(value, key);
        });
      } else {
        params[key.name] = decode(m[i], key);
      }
    }

    return Match(
      index: index,
      path: path,
      params: params,
    );
  };
}