gtag('set', 'linker', {
  'accept_incoming': true
});

    window.session_ids = JSON.parse(CookieHelper.get('_ga_session_ids') || '{}');

    function updateGa4Session(gaId, gaSessionId) {
        window.session_ids[gaId] = gaSessionId;
        document.cookie = "_ga_session_ids=" + encodeURIComponent(JSON.stringify(window.session_ids)) + "; path=/";
        console.log(gaId, gaSessionId);
    }

    function getGa4SessionData() {
        let ga4SessionsMatches = [];
        try {
            ga4SessionsMatches = [...document.cookie.matchAll(/_ga_([\w\d\-]*?)=GS\d\.\d\.(.+?)(?:;|$)/g)];
        } catch (e) {
            console.log(e);
        }

        if(ga4SessionsMatches?.length <= 0) {
            window.setTimeout(() => getGa4SessionData(), 200);
            console.log('ga4SessionsMatches not found, setTimeout getGa4SessionData');
            return;
        }

        for (const ga4SessionMatch of ga4SessionsMatches) {
            let gaId = 'G-' + ga4SessionMatch?.[1];
            let gaSessionId = ga4SessionMatch?.[2].split(".")?.[0];

            if (gaId && gaSessionId) {
                updateGa4Session(gaId, gaSessionId);
            }
        }
    }

    if (typeof dataLayer === 'object') {
        let sessionIdClosure = function(gaId) {
            return function(gaSessionId) {
                updateGa4Session(gaId, gaSessionId);
            }
        };

        for (dataLayerOption of dataLayer) {
            if (dataLayerOption[0] === 'config') {
                gtag('get', dataLayerOption[1], 'session_id', sessionIdClosure(dataLayerOption[1]));
            }
        }
    } else {
        console.log('dataLayer not found');
    }

    getGa4SessionData();