check matomo and disable if necessary

ui/analytics.js

@@ -56,7 +56,24 @@ type LogPublishParams = {
   channel_claim_id?: string,
 };
 
+const checkmatomo = (url, timeout = 2000) => {
+  return Promise.race([
+    fetch(url),
+    new Promise((resolve, reject) => setTimeout(() => reject(new Error('timeout')), timeout)),
+  ]);
+};
+
 let internalAnalyticsEnabled: boolean = IS_WEB || false;
+let matomoOnline = true;
+if (internalAnalyticsEnabled) {
+  checkmatomo(MATOMO_URL)
+    .then()
+    .catch(() => {
+      matomoOnline = false;
+      console.log('matomo offline');
+    });
+}
+
 // let thirdPartyAnalyticsEnabled: boolean = IS_WEB || false;
 // @if TARGET='app'
 if (window.localStorage.getItem(SHARE_INTERNAL) === 'true') internalAnalyticsEnabled = true;
@@ -89,7 +106,7 @@ const analytics: Analytics = {
     });
   },
   pageView: path => {
-    if (internalAnalyticsEnabled) {
+    if (internalAnalyticsEnabled && matomoOnline) {
       MatomoInstance.trackPageView({
         href: `${path}`,
       });
@@ -245,7 +262,7 @@ const analytics: Analytics = {
 };
 
 function sendMatomoEvent(category, action, name, value) {
-  if (internalAnalyticsEnabled) {
+  if (internalAnalyticsEnabled && matomoOnline) {
     const event = { category, action, name, value };
     MatomoInstance.trackEvent(event);
   }