prebid/Prebid.js

/**
 * The {@link module:modules/realTimeData} module is required
 * @module modules/dynamicAdBoost
 * @requires module:modules/realTimeData
 */

import { submodule } from '../src/hook.js'
import { loadExternalScript } from '../src/adloader.js';
import { getGlobal } from '../src/prebidGlobal.js';
import { deepAccess, deepSetValue, isEmptyStr } from '../src/utils.js';

/**
 * @typedef {import('../modules/rtdModule/index.js').RtdSubmodule} RtdSubmodule
 */

const MODULE_NAME = 'dynamicAdBoost';
const SCRIPT_URL = 'https://adxbid.info';
const CLIENT_SUPPORTS_IO = window.IntersectionObserver && window.IntersectionObserverEntry && window.IntersectionObserverEntry.prototype &&
    'intersectionRatio' in window.IntersectionObserverEntry.prototype;
// Options for the Intersection Observer
const dabOptions = {
  threshold: 0.5 // Trigger callback when 50% of the element is visible
};
let observer;
let dabStartDate;
let dabStartTime;

// Array of div IDs to track
let dynamicAdBoostAdUnits = {};

function init(config, userConsent) {
  dabStartDate = new Date();
  dabStartTime = dabStartDate.getTime();
  if (!CLIENT_SUPPORTS_IO) {
    return false;
  }
  // Create an Intersection Observer instance
  observer = new IntersectionObserver(dabHandleIntersection, dabOptions);
  if (config.params.keyId) {
    let keyId = config.params.keyId;
    if (keyId && !isEmptyStr(keyId)) {
      let dabDivIdsToTrack = config.params.adUnits;
      let dabInterval = setInterval(function() {
        // Observe each div by its ID
        dabDivIdsToTrack.forEach(divId => {
          let div = document.getElementById(divId);
          if (div) {
            observer.observe(div);
          }
        });

        let dabDateNow = new Date();
        let dabTimeNow = dabDateNow.getTime();
        let dabElapsedSeconds = Math.floor((dabTimeNow - dabStartTime) / 1000);
        let elapsedThreshold = 30;
        if (config.params.threshold) {
          elapsedThreshold = config.params.threshold;
        }
        if (dabElapsedSeconds >= elapsedThreshold) {
          clearInterval(dabInterval); // Stop
          loadLmScript(keyId);
        }
      }, 1000);

      return true;
    }
  }
  return false;
}

function loadLmScript(keyId) {
  let viewableAdUnits = Object.keys(dynamicAdBoostAdUnits);
  let viewableAdUnitsCSV = viewableAdUnits.join(',');
  const scriptUrl = `${SCRIPT_URL}/${keyId}.js?viewableAdUnits=${viewableAdUnitsCSV}`;
  loadExternalScript(scriptUrl, MODULE_NAME);
  observer.disconnect();
}

function getBidRequestData(reqBidsConfigObj, callback, config, userConsent) {
  const reqAdUnits = reqBidsConfigObj.adUnits || getGlobal().adUnits;

  if (Array.isArray(reqAdUnits)) {
    reqAdUnits.forEach(adunit => {
      let gptCode = deepAccess(adunit, 'code');
      if (dynamicAdBoostAdUnits.hasOwnProperty(gptCode)) {
        // AdUnits has reached target viewablity at some point
        deepSetValue(adunit, `ortb2Imp.ext.data.${MODULE_NAME}.${gptCode}`, dynamicAdBoostAdUnits[gptCode]);
      }
    });
  }
  callback();
}

let markViewed = (entry, observer) => {
  return () => {
    observer.unobserve(entry.target);
  }
}

// Callback function when an observed element becomes visible
function dabHandleIntersection(entries) {
  entries.forEach(entry => {
    if (entry.isIntersecting && entry.intersectionRatio > 0.5) {
      dynamicAdBoostAdUnits[entry.target.id] = entry.intersectionRatio;
      markViewed(entry, observer)
    }
  });
}

/** @type {RtdSubmodule} */
export const subModuleObj = {
  name: MODULE_NAME,
  init,
  getBidRequestData,
  markViewed
};

submodule('realTimeData', subModuleObj);