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/Algorithms.cpp

@@ -1448,4 +1448,14 @@ WebIDL::ExceptionOr<GC::Ref<IDBKeyRange>> convert_a_value_to_a_key_range(JS::Rea
     return IDBKeyRange::create(realm, key, key, false, false);
 }
 
+// https://w3c.github.io/IndexedDB/#count-the-records-in-a-range
+JS::Value count_the_records_in_a_range(GC::Ref<ObjectStore> source, GC::Ref<IDBKeyRange> range)
+{
+    // 1. Let count be the number of records, if any, in source’s list of records with key in range.
+    auto count = source->count_records_in_range(range);
+
+    // 2. Return count.
+    return JS::Value(count);
+}
+
 }