Function extractAmpAnalyticsConfig

ads/google/a4a/utils.js:668–715

(a4a, responseHeaders)

 * @return {?JsonObject} config or null if invalid/missing.
 */
export function extractAmpAnalyticsConfig(a4a, responseHeaders) {
  if (!responseHeaders.has(AMP_ANALYTICS_HEADER)) {
    return null;
  }
  try {
    const analyticsConfig = parseJson(
      responseHeaders.get(AMP_ANALYTICS_HEADER)
    );

    const acUrls = analyticsConfig['url'];
    const btrUrls = analyticsConfig['btrUrl'];
    if (
      (acUrls && !Array.isArray(acUrls)) ||
      (btrUrls && !Array.isArray(btrUrls))
    ) {
      dev().error(
        'AMP-A4A',
        'Invalid analytics',
        responseHeaders.get(AMP_ANALYTICS_HEADER)
      );
    }
    const hasActiveViewRequests = Array.isArray(acUrls) && acUrls.length;
    const hasBeginToRenderRequests = Array.isArray(btrUrls) && btrUrls.length;
    if (!hasActiveViewRequests && !hasBeginToRenderRequests) {
      return null;
    }
    const config = {
      'transport': {'beacon': false, 'xhrpost': false},
      'requests': {},
      'triggers': {},
    };
    if (hasActiveViewRequests) {
      generateActiveViewRequest(config, acUrls);
    }
    if (hasBeginToRenderRequests) {
      generateBeginToRenderRequest(config, btrUrls);
    }
    return config;
  } catch (err) {
    dev().error(
      'AMP-A4A',
      'Invalid analytics',
      err,
      responseHeaders.get(AMP_ANALYTICS_HEADER)
    );
  }
  return null;
}

/**
 * @param {!JsonObject} config