Frontend first draft

frontend/pweb/lib/utils/snapshot_haserror_check.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+
+import 'package:logging/logging.dart';
+
+
+bool hasError(AsyncSnapshot snapshot, String source) {
+  if (snapshot.hasError) {
+    Logger(source).warning('Error occurred', snapshot.error?.toString(), StackTrace.current);
+    return true;
+  }
+  return false;
+}