Grabs the UTMs from the URL and transform them into a unique CID store in a cookie and injected in Hatch widget

utms-to-cid.js

/* ***************************************************
-- CID to data-gh-cid  --
- To be placed before the HATCH WIDGET LIBRARY script
*************************************************** */
const HATCH_CID_COOKIE = "h_cid";
function createHatchCid() {
    var url = window.location.href;
    var regexp = /(?!&)utm_[^=]*=[^&]*(?=&)?/g;
    var utms = url.match(regexp);
    if(!utms) return null;
    var n_cid = '';
    var values = utms.reduce(function(obj, param) {
        var keyVal = param.split('=');
        n_cid +=  keyVal[1]+'_';
        return n_cid;
        }, {});
    n_cid = n_cid.slice(0, -1);
    return decodeURIComponent(n_cid.replace(/\+/g, " "));
}
 
var cid = createHatchCid();
if (cid != undefined) {
    var now = new Date();
    var expireDate = new Date(now.getTime() + 86400000);
    document.cookie = HATCH_CID_COOKIE + "=" + cid + "; expires=" + expireDate.toUTCString() + ";";
}
var hatchStoredCid =  document.cookie.split(';').filter((item) => item.trim().startsWith(HATCH_CID_COOKIE + "="));
if(hatchStoredCid.length > 0){
    var hatchStoredCidValue = hatchStoredCid[0].split(HATCH_CID_COOKIE + "=")[1]
    var hatchWidgets = document.querySelectorAll("[data-gh-buy-now-button]");
    for(i = 0;i < hatchWidgets.length; i++) hatchWidgets[i].setAttribute("data-gh-cid", hatchStoredCidValue);
	for(u = 0;u < hatchWidgets.length; u++) hatchWidgets[u].setAttribute("data-extra-request-parameters", "{'aid':'"+hatchStoredCidValue.toLowerCase()+"_'}");
}