From 637f35c0eb7e607ba3306be8a72925f10657ebce Mon Sep 17 00:00:00 2001
From: stelar7 <dudedbz@gmail.com>
Date: Thu, 8 May 2025 10:04:43 +0200
Subject: [PATCH] LibWeb/IDB: Implement clear_an_object_store

---
 .../LibWeb/IndexedDB/Internal/Algorithms.cpp      | 15 +++++++++++++++
 Libraries/LibWeb/IndexedDB/Internal/Algorithms.h  |  1 +
 Libraries/LibWeb/IndexedDB/Internal/Index.cpp     |  5 +++++
 Libraries/LibWeb/IndexedDB/Internal/Index.h       |  1 +
 .../LibWeb/IndexedDB/Internal/ObjectStore.cpp     |  5 +++++
 Libraries/LibWeb/IndexedDB/Internal/ObjectStore.h |  1 +
 6 files changed, 28 insertions(+)

diff --git a/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp b/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp
index 9bfb97cd01c..486d07dcfbd 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp
+++ b/Libraries/LibWeb/IndexedDB/Internal/Algorithms.cpp
@@ -1840,4 +1840,19 @@ GC::Ptr<IDBCursor> iterate_a_cursor(JS::Realm& realm, GC::Ref<IDBCursor> cursor,
     return cursor;
 }
 
+// https://w3c.github.io/IndexedDB/#clear-an-object-store
+JS::Value clear_an_object_store(GC::Ref<ObjectStore> store)
+{
+    // 1. Remove all records from store.
+    store->clear_records();
+
+    // 2. In all indexes which reference store, remove all records.
+    for (auto const& [name, index] : store->index_set()) {
+        index->clear_records();
+    }
+
+    // 3. Return undefined.
+    return JS::js_undefined();
+}
+
 }
diff --git a/Libraries/LibWeb/IndexedDB/Internal/Algorithms.h b/Libraries/LibWeb/IndexedDB/Internal/Algorithms.h
index 54fb23e5385..76fe5828d39 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/Algorithms.h
+++ b/Libraries/LibWeb/IndexedDB/Internal/Algorithms.h
@@ -45,5 +45,6 @@ WebIDL::ExceptionOr<GC::Ref<IDBKeyRange>> convert_a_value_to_a_key_range(JS::Rea
 JS::Value count_the_records_in_a_range(GC::Ref<ObjectStore>, GC::Ref<IDBKeyRange>);
 WebIDL::ExceptionOr<JS::Value> retrieve_a_value_from_an_object_store(JS::Realm&, GC::Ref<ObjectStore>, GC::Ref<IDBKeyRange>);
 GC::Ptr<IDBCursor> iterate_a_cursor(JS::Realm&, GC::Ref<IDBCursor>, GC::Ptr<Key> = nullptr, GC::Ptr<Key> = nullptr, u64 = 1);
+JS::Value clear_an_object_store(GC::Ref<ObjectStore>);
 
 }
diff --git a/Libraries/LibWeb/IndexedDB/Internal/Index.cpp b/Libraries/LibWeb/IndexedDB/Internal/Index.cpp
index 04becff6d3a..b71fc0f5a3c 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/Index.cpp
+++ b/Libraries/LibWeb/IndexedDB/Internal/Index.cpp
@@ -71,4 +71,9 @@ HTML::SerializationRecord Index::referenced_value(IndexRecord const& index_recor
         .value;
 }
 
+void Index::clear_records()
+{
+    m_records.clear();
+}
+
 }
diff --git a/Libraries/LibWeb/IndexedDB/Internal/Index.h b/Libraries/LibWeb/IndexedDB/Internal/Index.h
index 83903e89eb9..bad62d0cd47 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/Index.h
+++ b/Libraries/LibWeb/IndexedDB/Internal/Index.h
@@ -40,6 +40,7 @@ public:
     [[nodiscard]] KeyPath const& key_path() const { return m_key_path; }
 
     [[nodiscard]] bool has_record_with_key(GC::Ref<Key> key);
+    void clear_records();
 
     HTML::SerializationRecord referenced_value(IndexRecord const& index_record) const;
 
diff --git a/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.cpp b/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.cpp
index d11e82a7890..d2d114f9b2a 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.cpp
+++ b/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.cpp
@@ -84,4 +84,9 @@ Optional<Record&> ObjectStore::first_in_range(GC::Ref<IDBKeyRange> range)
     });
 }
 
+void ObjectStore::clear_records()
+{
+    m_records.clear();
+}
+
 }
diff --git a/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.h b/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.h
index 1222d5c3886..3f8ad31da91 100644
--- a/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.h
+++ b/Libraries/LibWeb/IndexedDB/Internal/ObjectStore.h
@@ -55,6 +55,7 @@ public:
     void store_a_record(Record const& record);
     u64 count_records_in_range(GC::Ref<IDBKeyRange> range);
     Optional<Record&> first_in_range(GC::Ref<IDBKeyRange> range);
+    void clear_records();
 
 protected:
     virtual void visit_edges(Visitor&) override;