extension PassphaseURL on String {
  String capitalize() {
    return "${this[0].toUpperCase()}${substring(1).toLowerCase()}";
  }

  String toURL() {
    var words = split(' ');

    for (var i = 0; i < words.length; i++) {
      words[i] = words[i].capitalize();
    }

    return words.join();
  }

  String toPhraseWithSpaces() {
    var phrase = '';

    for (var i = 0; i < length; i++) {
      if (this[i] == this[i].toUpperCase()) {
        phrase += ' ';
      }
      phrase += this[i].toLowerCase();
    }

    phrase = phrase.trim();

    return phrase.toLowerCase();
  }
}