extractVariables function

Implementation

List<VariableInfo> extractVariables(String txt) {
  // TODO 20250409 MIGRATE TO meta_data RATHER THAN `glimpse()`.

  // Extract the variable information from the latest glimpse(ds)

  String cmd = '> glimpse(ds)';
  String vars = rExtract(txt, cmd);

  // Rgex to capture variable names with special characters like '&'.
  // It captures any characters non-greedily between '$ ' and ' <type>'.

  final regex = RegExp(r'\$\s+([^<]+?)\s+<([^>]+)>\s+(.+)', multiLine: true);
  final matches = regex.allMatches(vars);

  return matches.map((match) {
    // Trim potential trailing whitespace from the captured name.

    var name = match.group(1)!.trim();
    final type = match.group(2)!.trim();
    final details = match.group(3)!.trim();

    // Check if the name is wrapped in quotes and contains no internal whitespace.

    if ((name.startsWith('"') && name.endsWith('"')) ||
        (name.startsWith('\'') && name.endsWith('\'')) ||
        (name.startsWith('`') && name.endsWith('`'))) {
      // Extract the content inside the quotes.

      var innerName = name.substring(1, name.length - 1);
      // Remove quotes only if there's no whitespace inside.

      if (!innerName.contains(RegExp(r'\s'))) {
        name = innerName;
      }
    }

    return VariableInfo(name: name, type: type, details: details);
  }).toList();
}