service-worker status indicator works well again (ref. #16)

libresilient.js

@@ -472,23 +472,6 @@ libresilient.displayMessage = (msg) => {
  */
 window.addEventListener('load', function() {
     libresilient.status = "loaded";
-    /*
-     * status display: how did this file get fetched?
-     *
-     * yes, this code has to be directly here,
-     * since we want to know how *this exact file* got fetched
-     */
-    if (typeof libresilient.info[window.location.href] === 'object') {
-        // service worker info
-        for (let libresilient_sw of document.querySelectorAll(".libresilient-status-service-worker")) {
-            libresilient_sw.className += " active";
-            try {
-                libresilient_sw.querySelector('.status').innerHTML = "yes";
-            } catch(e) {
-                // nothing to do here, move along
-            }
-        }
-    }
     // was any content unavailable so far?
     if (libresilient.contentUnavailable) {
         libresilient.displayMessage('Some content seems unavailable. Attempting to retrieve it via LibResilient.')
@@ -527,6 +510,7 @@ if ('serviceWorker' in navigator) {
     
     // handling the messages from ServiceWorker
     navigator.serviceWorker.addEventListener('message', event => {
+        
         self.log('browser-side', 'LibResilientInfo received!')
         if (event.data.url) {
             self.log('browser-side', '+-- for:', event.data.url)
@@ -595,7 +579,23 @@ if ('serviceWorker' in navigator) {
             }
         }
         if (event.data.clientId) {
+            
             self.log('browser-side', '+-- got our clientId:', event.data.clientId)
+            
+            // if libresilient.clientId is null, this is the first time
+            // we got wind that the service worker is running
+            // service worker info
+            if (libresilient.clientId === null) {
+                for (let libresilient_sw of document.querySelectorAll(".libresilient-status-service-worker")) {
+                    libresilient_sw.className += " active";
+                    try {
+                        libresilient_sw.querySelector('.status').innerHTML = "yes";
+                    } catch(e) {
+                        // nothing to do here, move along
+                    }
+                }
+            }
+            // set the clientId internally, we will need it
             libresilient.clientId = event.data.clientId
         }
         if (event.data.plugins) {