function handleTSTypeOperator()

in src/utils/getTSType.ts [339:373]

• 29 lines of code
• 8 McCabe index (conditional complexity)

function handleTSTypeOperator(
  path: NodePath,
  _typeParams: TypeParameters | null,
  importer: Importer,
): TypeDescriptor<TSFunctionSignatureType> | null {
  if (path.node.operator !== 'keyof') {
    return null;
  }

  let value = path.get('typeAnnotation');
  if (t.TSTypeQuery.check(value.node)) {
    value = value.get('exprName');
  } else if (value.node.id) {
    value = value.get('id');
  }

  const resolvedPath = resolveToValue(value, importer);
  if (
    resolvedPath &&
    (t.ObjectExpression.check(resolvedPath.node) ||
      t.TSTypeLiteral.check(resolvedPath.node))
  ) {
    const keys = resolveObjectToNameArray(resolvedPath, importer, true);

    if (keys) {
      return {
        name: 'union',
        raw: printValue(path),
        elements: keys.map(key => ({ name: 'literal', value: key })),
      };
    }
  }

  return null;
}