text: /**
   * Copyright 2016 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.
   */
  
  import {
    adsenseIsA4AEnabled,
  } from '../extensions/amp-ad-network-adsense-impl/0.1/adsense-a4a-config';
  import {
    doubleclickIsA4AEnabled,
  } from
  '../extensions/amp-ad-network-doubleclick-impl/0.1/doubleclick-a4a-config';
  import {
    fakeIsA4AEnabled,
  } from
  '../extensions/amp-ad-network-fake-impl/0.1/fake-a4a-config';
  import {getMode} from '../src/mode';
  import {map} from '../src/utils/object';
  
  /**
   * Registry for A4A (AMP Ads for AMPHTML pages) "is supported" predicates.
   * If an ad network, {@code ${NETWORK}}, is registered in this object, then the
   * {@code <amp-ad type="${NETWORK}">} implementation will look up its predicate
   * here. If there is a predicate and it and returns {@code true}, then
   * {@code amp-ad} will attempt to render the ad via the A4A pathway (fetch
   * ad creative via early XHR CORS request; verify that it is validated AMP;
   * and then render directly in the host page by splicing into the host DOM).
   * Otherwise, it will attempt to render the ad via the existing "3p iframe"
   * pathway (delay load into a cross-domain iframe).
   *
   * @type {!Object<!string, !function(!Window, !Element): boolean>}
   */
  export const a4aRegistry = map({
    'adsense': adsenseIsA4AEnabled,
    'doubleclick': doubleclickIsA4AEnabled,
    // TODO: Add new ad network implementation "is enabled" functions here.  Note:
    // if you add a function here that requires a new "import", above, you'll
    // probably also need to add a whitelist exception to
    // build-system/dep-check-config.js in the "filesMatching: 'ads/**/*.js' rule.
  });
  
  // Note: the 'fake' ad network implementation is only for local testing.
  // Normally, ad networks should add their *IsA4AEnabled callback directly
  // to the a4aRegistry, above.  Ad network implementations should NOT use
  // getMode() in this file.  If they need to check getMode() state, they
  // should do so inside their *IsA4AEnabled callback.
  if (getMode().localDev || getMode().test) {
    a4aRegistry['fake'] = fakeIsA4AEnabled;
  }
  
  /**
   * An object mapping signing server names to their corresponding URLs.
   * @type {!Object<string, string>}
   */
  export const signingServerURLs = {
    'google': 'https://cdn.ampproject.org/amp-ad-verifying-keyset.json',
    'google-dev': 'https://cdn.ampproject.org/amp-ad-verifying-keyset-dev.json',
    'cloudflare': 'https://amp.cloudflare.com/amp-ad-verifying-keyset.json',
    'cloudflare-dev': 'https://amp.cloudflare.com/amp-ad-verifying-keyset-dev.json',
  };
  