collectVariables function

Map<String, String> collectVariables(JsonMap map)

Collects all variable definitions from map by scanning for (variables) sections at every nesting level. Later definitions override earlier ones.

Implementation

Map<String, String> collectVariables(JsonMap map) {
  final result = <String, String>{};
  final metaPattern = RegExp(r'^\(\w+\)$');

  for (final key in map.keys) {
    if (key == variablesDefinitionKey) {
      final vars = map[key];
      if (vars is Map) {
        vars.forEach((k, v) {
          if (v != null) result[k.toString()] = v.toString();
        });
      }
      continue;
    }

    if (metaPattern.hasMatch(key)) continue;

    final value = map[key];
    if (value is Map) {
      final nested = value.map((k, v) => MapEntry(k.toString(), v)).cast<String, dynamic>();
      result.addAll(collectVariables(nested));
    }
  }

  return result;
}