/**
 * @license
 * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */

import * as dom5 from 'dom5/lib/index-next';
import * as parse5 from 'parse5';

const templateExtensionNames =
    ['dom-bind', 'dom-if', 'dom-repeat', 'dom-template'];

export const nodeIsTemplateExtension = (node: parse5.ASTNode) => {
  const isAttrValue = dom5.getAttribute(node, 'is');
  return !!(
      node.tagName === 'template' && isAttrValue &&
      templateExtensionNames.includes(isAttrValue));
};