index.js

/**
 * Copyright 2019 The AMP HTML Authors. All Rights Reserved.
 *
 * Licensed 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.
 */

'use strict';

const loadRules = require('./lib/loadRules');
const AmpValidatorRules = require('./lib/AmpValidatorRules');

let cached = null;

async function fetch(opt = {}) {
  if (!opt.noCache && cached) {
    return cached;
  }

  let rules = opt.rules;

  if (!rules) {
    rules = await loadRules(opt);
  }

  cached = new AmpValidatorRules(rules);
  return cached;
}

module.exports = {fetch};