@bemit/consent-ui/PluginGoogle/PluginGoogle.js

© 2022 [bemit](https://bemit.eu)

const gtagState = {
  loaded: false
};
window.gtag = function () {
  window.dataLayer?.push(arguments);
};
export const loadGtag = (googleTracking, cb) => {
  const scriptGa = document.createElement('script');
  scriptGa.async = true;
  scriptGa.src = 'https://www.googletagmanager.com/gtag/js?id=' + googleTracking;
  scriptGa.onload = cb;
  document.body.append(scriptGa);
};
export const pluginGoogle = (group, googleTracking) => ({
  shouldBe: options => {
    return Boolean(options?.groups?.[group]);
  },
  create: wasAlreadyCreated => {
    if (wasAlreadyCreated) return;
    let tmpLayer = [];
    if (!gtagState.loaded) {
      tmpLayer = [...(window.dataLayer || [])];
      window.dataLayer = [];
    }
    const cb = () => {
      window.gtag?.('js', new Date());
      window.gtag?.('config', googleTracking, {
        'anonymize_ip': true,
        'transport_type': 'beacon',
        'send_page_view': false
      });
      window.gtag?.('event', 'page_view', {
        'page_title': document.title,
        'page_location': window.location.toString()
      });
      tmpLayer.forEach(function (elem) {
        window.dataLayer.push(elem);
      });
    };
    if (!gtagState.loaded) {
      gtagState.loaded = true;
      loadGtag(googleTracking, cb);
    } else {
      cb();
    }
  },
  destroy: () => {
    return {
      requiresRefresh: true
    };
  }
});