add time limit to frontend update

src/public/app/services/utils.js

@@ -316,6 +316,24 @@ function dynamicRequire(moduleName) {
     }
 }
 
+function timeLimit(cb, limitMs) {
+    return new Promise((res, rej) => {
+        let resolved = false;
+
+        cb().then(() => {
+            resolved = true;
+
+            res();
+        });
+
+        setTimeout(() => {
+            if (!resolved) {
+                rej('Process exceeded time limit ' + limitMs);
+            }
+        }, limitMs);
+    });
+}
+
 export default {
     reloadApp,
     parseDate,
@@ -355,5 +373,6 @@ export default {
     normalizeShortcut,
     copySelectionToClipboard,
     isCKEditorInitialized,
-    dynamicRequire
-};
+    dynamicRequire,
+    timeLimit
+};

src/public/app/services/ws.js

@@ -157,7 +157,7 @@ async function consumeSyncData() {
         const nonProcessedSyncRows = allSyncRows.filter(sync => !processedSyncIds.has(sync.id));
 
         try {
-            await processSyncRows(nonProcessedSyncRows);
+            await utils.timeLimit(async () => await processSyncRows(nonProcessedSyncRows), 5000);
         }
         catch (e) {
             logError(`Encountered error ${e.message}: ${e.stack}, reloading frontend.`);