From c83a3db542d57236efbfba362f136a7ef9246617 Mon Sep 17 00:00:00 2001
From: Timothy Flynn <trflynn89@pm.me>
Date: Sat, 23 Nov 2024 09:29:20 -0500
Subject: [PATCH] LibJS: Handle Temporal.PlainDate in dynamic calendar
 operations

---
 Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp | 2 ++
 Libraries/LibJS/Runtime/Temporal/Calendar.cpp           | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp b/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
index 8f01fabd29d..3223eb696f9 100644
--- a/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
+++ b/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp
@@ -624,6 +624,8 @@ ThrowCompletionOr<bool> is_partial_temporal_object(VM& vm, Value value)
     //    [[InitializedTemporalTime]], [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal
     //    slot, return false.
     // FIXME: Add the other types as we define them.
+    if (is<PlainDate>(object))
+        return false;
     if (is<PlainMonthDay>(object))
         return false;
     if (is<PlainYearMonth>(object))
diff --git a/Libraries/LibJS/Runtime/Temporal/Calendar.cpp b/Libraries/LibJS/Runtime/Temporal/Calendar.cpp
index fb185cfbecc..34083508d49 100644
--- a/Libraries/LibJS/Runtime/Temporal/Calendar.cpp
+++ b/Libraries/LibJS/Runtime/Temporal/Calendar.cpp
@@ -452,6 +452,8 @@ ThrowCompletionOr<String> to_temporal_calendar_identifier(VM& vm, Value temporal
         //    internal slot, then
         //     i. Return temporalCalendarLike.[[Calendar]].
         // FIXME: Add the other calendar-holding types as we define them.
+        if (is<PlainDate>(temporal_calendar_object))
+            return static_cast<PlainDate const&>(temporal_calendar_object).calendar();
         if (is<PlainMonthDay>(temporal_calendar_object))
             return static_cast<PlainMonthDay const&>(temporal_calendar_object).calendar();
         if (is<PlainYearMonth>(temporal_calendar_object))
@@ -476,6 +478,8 @@ ThrowCompletionOr<String> get_temporal_calendar_identifier_with_iso_default(VM&
     //    [[InitializedTemporalYearMonth]], or [[InitializedTemporalZonedDateTime]] internal slot, then
     //     a. Return item.[[Calendar]].
     // FIXME: Add the other calendar-holding types as we define them.
+    if (is<PlainDate>(item))
+        return static_cast<PlainDate const&>(item).calendar();
     if (is<PlainMonthDay>(item))
         return static_cast<PlainMonthDay const&>(item).calendar();
     if (is<PlainYearMonth>(item))