LibWeb/IDB: Implement retrieve_multiple_values_from_an_object_store

Author: https://github.com/stelar7
Commit: ddaae635ac
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4662
Reviewed-by: https://github.com/shannonbooth ✅

Libraries/LibWeb/IndexedDB/Internal/ObjectStore.cpp

@@ -89,4 +89,18 @@ void ObjectStore::clear_records()
     m_records.clear();
 }
 
+GC::ConservativeVector<Record> ObjectStore::first_n_in_range(GC::Ref<IDBKeyRange> range, Optional<WebIDL::UnsignedLong> count)
+{
+    GC::ConservativeVector<Record> records(range->heap());
+    for (auto const& record : m_records) {
+        if (range->is_in_range(record.key))
+            records.append(record);
+
+        if (count.has_value() && records.size() >= *count)
+            break;
+    }
+
+    return records;
+}
+
 }