LibWeb/IDB: Implement IDBObjectStore::createIndex

Author: https://github.com/stelar7
Commit: 3367352991
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4178
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/AtkinsSJ

Libraries/LibWeb/IndexedDB/IDBObjectStore.cpp

@@ -9,6 +9,7 @@
 #include <LibWeb/Bindings/IDBObjectStorePrototype.h>
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/HTML/EventNames.h>
+#include <LibWeb/IndexedDB/IDBIndex.h>
 #include <LibWeb/IndexedDB/IDBObjectStore.h>
 
 namespace Web::IndexedDB {
@@ -41,6 +42,7 @@ void IDBObjectStore::visit_edges(Visitor& visitor)
     Base::visit_edges(visitor);
     visitor.visit(m_store);
     visitor.visit(m_transaction);
+    visitor.visit(m_indexes);
 }
 
 // https://w3c.github.io/IndexedDB/#dom-idbobjectstore-keypath
@@ -101,4 +103,54 @@ WebIDL::ExceptionOr<void> IDBObjectStore::set_name(String const& value)
     return {};
 }
 
+// https://w3c.github.io/IndexedDB/#dom-idbobjectstore-createindex
+WebIDL::ExceptionOr<GC::Ref<IDBIndex>> IDBObjectStore::create_index(String const& name, KeyPath key_path, IDBIndexParameters options)
+{
+    auto& realm = this->realm();
+
+    // 1. Let transaction be this's transaction.
+    auto transaction = this->transaction();
+
+    // 2. Let store be this's object store.
+    auto store = this->store();
+
+    // 3. If transaction is not an upgrade transaction, throw an "InvalidStateError" DOMException.
+    if (transaction->mode() != Bindings::IDBTransactionMode::Versionchange)
+        return WebIDL::InvalidStateError::create(realm, "Transaction is not an upgrade transaction"_string);
+
+    // FIXME: 4. If store has been deleted, throw an "InvalidStateError" DOMException.
+
+    // 5. If transaction’s state is not active, then throw a "TransactionInactiveError" DOMException.
+    if (transaction->state() != IDBTransaction::TransactionState::Active)
+        return WebIDL::TransactionInactiveError::create(realm, "Transaction is not active while creating index"_string);
+
+    // 6. If an index named name already exists in store, throw a "ConstraintError" DOMException.
+    if (store->index_set().contains(name))
+        return WebIDL::ConstraintError::create(realm, "An index with the given name already exists"_string);
+
+    // 7. If keyPath is not a valid key path, throw a "SyntaxError" DOMException.
+    if (!is_valid_key_path(key_path))
+        return WebIDL::SyntaxError::create(realm, "Key path is not valid"_string);
+
+    // 8. Let unique be options’s unique member.
+    auto unique = options.unique;
+
+    // 9. Let multiEntry be options’s multiEntry member.
+    auto multi_entry = options.multi_entry;
+
+    // 10. If keyPath is a sequence and multiEntry is true, throw an "InvalidAccessError" DOMException.
+    if (key_path.has<Vector<String>>() && multi_entry)
+        return WebIDL::InvalidAccessError::create(realm, "Key path is a sequence and multiEntry is true"_string);
+
+    // 11. Let index be a new index in store.
+    //     Set index’s name to name, key path to keyPath, unique flag to unique, and multiEntry flag to multiEntry.
+    auto index = Index::create(realm, store, name, key_path, unique, multi_entry);
+
+    // 12. Add index to this's index set.
+    this->index_set().set(name, index);
+
+    // 13. Return a new index handle associated with index and this.
+    return IDBIndex::create(realm, index, *this);
+}
+
 }