packages/fragment-identifier/src/index.js

/**
 * @license
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

export { SyntaxError, parse } from './fragment.js';

/**
 * Convert a Selector or State into a fragment identifier string.
 * @param {(Selector|State)} resource
 * @return {string}
 */
export function stringify(resource) {
  const data = Object.keys(resource)
    .map(key => {
      let value = resource[key];
      if (value instanceof Object) value = value.valueOf();
      if (value instanceof Object) {
        value = stringify(value);
        return `${encodeURIComponent(key)}=${value}`;
      }
      return [key, value].map(encodeURIComponent).join('=');
    })
    .join(',');

  if (/Selector$/.test(resource.type)) return `selector(${data})`;
  if (/State$/.test(resource.type)) return `state(${data})`;
  throw new TypeError('Resource must be a Selector or State');
}