Custom pixel - Pandectes initialization for consent mode

pandectes-gcm-init.js

const COOKIE_NAME = '_pandectes_gdpr';
const GRANTED = 'granted';
const DENIED = 'denied';

const STORE_DEFAULT_POLICY = DENIED;

const getCookie = (cookieName) => {
    const cookieString = document.cookie;
    const cookieStart = cookieString.indexOf(cookieName + "=");
    if (cookieStart === -1) {
        return null;
    }
    let cookieEnd = cookieString.indexOf(";", cookieStart);
    if (cookieEnd === -1) {
        cookieEnd = cookieString.length;
    }
    const cookieValue = cookieString.substring(cookieStart + cookieName.length + 1, cookieEnd);
    try {
        const  decodedValue = atob(cookieValue);
        const parsedValue = JSON.parse(decodedValue);
        return parsedValue;
    } catch (error) {
        console.error("Error parsing cookie value:", error);
        return null;
    }
};

const getStorage = (cookie) => {
  let output = {
    ad_storage: STORE_DEFAULT_POLICY,
    ad_user_data: STORE_DEFAULT_POLICY,
    ad_personalization: STORE_DEFAULT_POLICY,
    analytics_storage: STORE_DEFAULT_POLICY,
    personalization_storage: STORE_DEFAULT_POLICY,
    functionality_storage: STORE_DEFAULT_POLICY
  };
  if (cookie && cookie.preferences !== null && cookie.preferences !== undefined) {
    const p1 = (cookie.preferences & 1) === 0;
    const p2 = (cookie.preferences & 2) === 0;
    const p4 = (cookie.preferences & 4) === 0;
    output = {
      ad_storage: p4 ? GRANTED : DENIED,
      ad_user_data: p4 ? GRANTED : DENIED,
      ad_personalization: p4 ? GRANTED : DENIED,
      analytics_storage: p2 ? GRANTED : DENIED,
      personalization_storage: p1 ? GRANTED : DENIED,
      functionality_storage: p1 ? GRANTED : DENIED
    };
  }
  return output;
};

// data layer initialization
window.dataLayer = window.dataLayer || []; 
function gtag() { dataLayer.push(arguments); }

const cookie = getCookie(COOKIE_NAME);
const storage = getStorage(cookie);

// consent mode initialization
gtag('consent', 'default', storage);