LibWeb/IDB: Implement IDBDatabase::createObjectStore

Author: https://github.com/stelar7
Commit: 1057c88fdd
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4077
Reviewed-by: https://github.com/AtkinsSJ
Reviewed-by: https://github.com/gmta ✅

Libraries/LibWeb/IndexedDB/IDBDatabase.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, stelar7 <dudedbz@gmail.com>
+ * Copyright (c) 2024-2025, stelar7 <dudedbz@gmail.com>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -11,10 +11,19 @@
 #include <LibWeb/HTML/DOMStringList.h>
 #include <LibWeb/IndexedDB/IDBRequest.h>
 #include <LibWeb/IndexedDB/Internal/Database.h>
+#include <LibWeb/IndexedDB/Internal/ObjectStore.h>
 #include <LibWeb/StorageAPI/StorageKey.h>
 
 namespace Web::IndexedDB {
 
+using KeyPath = Variant<String, Vector<String>>;
+
+// https://w3c.github.io/IndexedDB/#dictdef-idbobjectstoreparameters
+struct IDBObjectStoreParameters {
+    Optional<KeyPath> key_path;
+    bool auto_increment { false };
+};
+
 // FIXME: I'm not sure if this object should do double duty as both the connection and the interface
 //        but the spec treats it as such...?
 // https://w3c.github.io/IndexedDB/#IDBDatabase-interface
@@ -44,6 +53,8 @@ public:
     [[nodiscard]] ConnectionState state() const { return m_state; }
     [[nodiscard]] GC::Ref<Database> associated_database() { return m_associated_database; }
 
+    WebIDL::ExceptionOr<GC::Ref<IDBObjectStore>> create_object_store(String const&, IDBObjectStoreParameters const&);
+
     void close();
 
     void set_onabort(WebIDL::CallbackType*);