LibWeb: Implement IDBTransaction::abort

Author: https://github.com/stelar7
Commit: https://github.com/LadybirdBrowser/ladybird/commit/7c3f44282d5
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2696
Reviewed-by: https://github.com/gmta

Libraries/LibWeb/IndexedDB/IDBTransaction.cpp

@@ -7,6 +7,7 @@
 #include <LibWeb/Bindings/Intrinsics.h>
 #include <LibWeb/HTML/EventNames.h>
 #include <LibWeb/IndexedDB/IDBTransaction.h>
+#include <LibWeb/IndexedDB/Internal/Algorithms.h>
 
 namespace Web::IndexedDB {
 
@@ -69,4 +70,16 @@ WebIDL::CallbackType* IDBTransaction::onerror()
     return event_handler_attribute(HTML::EventNames::error);
 }
 
+WebIDL::ExceptionOr<void> IDBTransaction::abort()
+{
+    // 1. If this's state is committing or finished, then throw an "InvalidStateError" DOMException.
+    if (m_state == TransactionState::Committing || m_state == TransactionState::Finished)
+        return WebIDL::InvalidStateError::create(realm(), "Transaction is ending"_string);
+
+    // 2. Set this's state to inactive and run abort a transaction with this and null.
+    m_state = TransactionState::Inactive;
+    abort_a_transaction(*this, nullptr);
+    return {};
+}
+
 }

Libraries/LibWeb/IndexedDB/IDBTransaction.h

@@ -47,6 +47,8 @@ public:
     [[nodiscard]] bool is_readonly() const { return m_mode == Bindings::IDBTransactionMode::Readonly; }
     [[nodiscard]] bool is_readwrite() const { return m_mode == Bindings::IDBTransactionMode::Readwrite; }
 
+    WebIDL::ExceptionOr<void> abort();
+
     void set_onabort(WebIDL::CallbackType*);
     WebIDL::CallbackType* onabort();
     void set_oncomplete(WebIDL::CallbackType*);