discourse-matomo-analytics/common/head_tag.html

<script type="text/discourse-plugin" version="0.2">
  api.onPageChange((url, title) => {
    const currentUser = api.getCurrentUser();

    if (settings.exclude_groups.trim() && currentUser) {
      const excludedGroups = settings.exclude_groups.split(",").map(g => g.trim());
      const currentUserGroups = currentUser.groups.map(g => g.name);
      if (excludedGroups.filter(g => currentUserGroups.includes(g)).length) {
        return;
      }
    }

    window._paq = window._paq || [];
    window._paq_loaded = window._paq_loaded || false;

    if (!_paq_loaded) {
      var u = `//${settings.host_url}/`;
      _paq.push(['setTrackerUrl', u+'piwik.php']);
      _paq.push(['setSiteId', settings.website_id]);
      var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
      g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
      _paq_loaded = true;
    }

    const userIdField = settings.user_id_tracking.trim();
    if (userIdField && currentUser && currentUser[userIdField]) {
      _paq.push(['setUserId', currentUser[userIdField]]);
    }

    if (settings.subdomain_tracking) {
      const allDomains = "*" + document.domain.substring(document.domain.indexOf("."));
      _paq.push(["setCookieDomain", allDomains]);
      _paq.push(["setDomains", allDomains]);
    }

    _paq.push(["setCustomUrl", url]);
    _paq.push(["setDocumentTitle", title]);
    _paq.push(["trackPageView"]);
    _paq.push(['enableLinkTracking']);
  });
</script>