/**
   * Fix all words that should be all uppercase and lowercases all words that are currently all
   * uppercase (but shouldn't be).
   *
   * @param line line to fix
   * @param originalLine original line
   * @param so {@link SubtitleObject}
   * @return fixed line
   */
  private static String fixAllUppercase(String line, String originalLine, SubtitleObject so) {
    String[] split = so.split(RegexEnum.SPACE, line);
    String current = null;
    for (int i = 0; i < split.length; ++i) {
      current = split[i];
      if (ALL_UPPERCASE.contains(current)) {
        if (!current.equals(current.toUpperCase())) {
          split[i] = split[i].toUpperCase();
        }
      } else if (POTENTIAL_ALL_UPPERCASE.contains(current)) {
        if (originalLine.indexOf(current.toUpperCase()) == line.indexOf(current)) {
          split[i] = split[i].toUpperCase();
        }
      } else if (current.length() > 1
          && current.equals(current.toUpperCase())
          && !StringUtil.containsLettersAndNumbers(current)) {
        split[i] = split[i].toLowerCase();
      }
    }

    return String.join(" ", split);
  }
  /**
   * Fix all proper nouns.
   *
   * @param line line to fix
   * @param so {@link SubtitleObject}
   * @return fixed line
   */
  private static String fixProperNouns(String line, SubtitleObject so) {
    String[] split = so.split(RegexEnum.SPACE, line);
    String current = null;
    for (int i = 0; i < split.length; ++i) {
      current = split[i];
      if (!StringUtil.isPunctuation(current) && !StringUtil.containsLettersAndNumbers(current)) {
        if (StringUtil.startsUpperCase(current)
            && current.length() > 1
            && StringUtil.countUppercase(current) == 1) {
          if (!PROPER_NOUNS.contains(current) && !POTENTIAL_PROPER_NOUNS.contains(current)) {
            split[i] = current.toLowerCase();
          }
        } else {
          if (PROPER_NOUNS.contains(current)) {
            split[i] = StringUtil.capitalize(current);
          }
        }
      }
    }

    return String.join(" ", split);
  }