Function addCsiSignalsToAmpAnalyticsConfig

ads/google/a4a/utils.js:794–849

(
  win,
  element,
  config,
  qqid,
  isVerifiedAmpCreative
)

 * @return {?JsonObject} config or null if invalid/missing.
 */
export function addCsiSignalsToAmpAnalyticsConfig(
  win,
  element,
  config,
  qqid,
  isVerifiedAmpCreative
) {
  // Add CSI pingbacks.
  const correlator = getCorrelator(win, element);
  const slotId = Number(element.getAttribute('data-amp-slot-index'));
  const eids = encodeURIComponent(element.getAttribute(EXPERIMENT_ATTRIBUTE));
  let aexp = element.getAttribute(AMP_EXPERIMENT_ATTRIBUTE);
  if (aexp) {
    // aexp URL param is separated by `!`, not `,`.
    aexp = aexp.replace(/,/g, '!');
  }
  const adType = element.getAttribute('type');
  const initTime = Number(
    getTimingDataSync(win, 'navigationStart') || Date.now()
  );
  const deltaTime = Math.round(
    win.performance && win.performance.now
      ? win.performance.now()
      : Date.now() - initTime
  );
  const baseCsiUrl =
    'https://csi.gstatic.com/csi?s=a4a' +
    `&c=${correlator}&slotId=${slotId}&qqid.${slotId}=${qqid}` +
    `&dt=${initTime}` +
    (eids != 'null' ? `&e.${slotId}=${eids}` : '') +
    (aexp ? `&aexp=${aexp}` : '') +
    `&rls=${mode.version()}&adt.${slotId}=${adType}`;
  const isAmpSuffix = isVerifiedAmpCreative ? 'Friendly' : 'CrossDomain';
  config['triggers']['continuousVisibleIniLoad'] = {
    'on': 'ini-load',
    'selector': 'amp-ad',
    'selectionMethod': 'closest',
    'request': 'iniLoadCsi',
  };
  config['triggers']['continuousVisibleRenderStart'] = {
    'on': 'render-start',
    'selector': 'amp-ad',
    'selectionMethod': 'closest',
    'request': 'renderStartCsi',
  };
  config['requests']['iniLoadCsi'] =
    baseCsiUrl + `&met.a4a.${slotId}=iniLoadCsi${isAmpSuffix}.${deltaTime}`;
  config['requests']['renderStartCsi'] =
    baseCsiUrl + `&met.a4a.${slotId}=renderStartCsi${isAmpSuffix}.${deltaTime}`;

  // Add CSI ping for visibility.
  config['requests']['visibilityCsi'] =
    baseCsiUrl + `&met.a4a.${slotId}=visibilityCsi.${deltaTime}`;
  config['triggers']['continuousVisible']['request'].push('visibilityCsi');
  return config;
}

/**