extractTitle method

Implementation

// PDF Creation

/// Extract the title from the title string. The actual title is expected to
/// be the fist line and begins with the markdown #. We strip the #. If not
/// title is found the return the empty string.

String extractTitle(String title) {
  List<String> lines = title.split('\n');

  for (String line in lines) {
    // Trim leading and trailing spaces and check if the string is not empty.

    if (line.trim().isNotEmpty) {
      // Use a regular expression to check if the string starts with spaces
      // followed by a #.

      RegExp regExp = RegExp(r'^\s*#(.*)');

      // If the string matches the pattern, return the part after the # and
      // spaces.  Return an empty string if the first non-empty string doesn't
      // start with #

      Match? match = regExp.firstMatch(line);

      return match != null ? match.group(1)?.trim() ?? '' : '';
    }
  }

  return '';
}