LibWeb/IDB: Implement count_the_records_in_a_range

Author: https://github.com/stelar7
Commit: 694375d3ac
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4505
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/IndexedDB/Internal/ObjectStore.cpp

@@ -67,4 +67,14 @@ void ObjectStore::store_a_record(Record const& record)
     });
 }
 
+u64 ObjectStore::count_records_in_range(GC::Ref<IDBKeyRange> range)
+{
+    u64 count = 0;
+    for (auto const& record : m_records) {
+        if (range->is_in_range(record.key))
+            ++count;
+    }
+    return count;
+}
+
 }