function validateNamespacedFbtElement()

in packages/babel-plugin-fbt/src/FbtUtil.js [100:141]

• 36 lines of code
• 18 McCabe index (conditional complexity)

function validateNamespacedFbtElement(
  moduleName: string,
  node: BabelNode,
): string {
  let valid = false;
  let handlerName;

  // Actual namespaced version, e.g. <fbt:param>
  if (isJSXNamespacedName(node)) {
    handlerName = node.name.name;
    valid =
      isJSXIdentifier(node.namespace) &&
      node.namespace.name === moduleName &&
      (handlerName === 'enum' ||
        handlerName === 'param' ||
        handlerName === 'plural' ||
        handlerName === 'pronoun' ||
        handlerName === 'name' ||
        handlerName === 'same-param');
    // React's version, e.g. <FbtParam>, or <FbtEnum>
  } else if (isJSXIdentifier(node)) {
    handlerName = node.name.substr(3).toLowerCase();
    valid =
      node.name === 'FbtEnum' ||
      node.name === 'FbtParam' ||
      node.name === 'FbtPlural' ||
      node.name === 'FbtPronoun' ||
      node.name === 'FbtName' ||
      node.name === 'FbtSameParam';
  }

  if (!valid) {
    handlerName = 'implicitParamMarker';
  }

  if (handlerName === 'same-param' || handlerName === 'sameparam') {
    handlerName = 'sameParam';
  }

  invariant(handlerName != null, 'handlerName must not be null');
  return handlerName;
}