ladybird/Userland/Libraries/LibJS/Runtime/Temporal/CalendarConstructor.cpp

/*
 * Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/Calendar.h>
#include <LibJS/Runtime/Temporal/CalendarConstructor.h>

namespace JS::Temporal {

// 12.2 The Temporal.Calendar Constructor, https://tc39.es/proposal-temporal/#sec-temporal-calendar-constructor
CalendarConstructor::CalendarConstructor(Realm& realm)
    : NativeFunction(realm.vm().names.Calendar.as_string(), realm.intrinsics().function_prototype())
{
}

ThrowCompletionOr<void> CalendarConstructor::initialize(Realm& realm)
{
    MUST_OR_THROW_OOM(NativeFunction::initialize(realm));

    auto& vm = this->vm();

    // 12.3.1 Temporal.Calendar.prototype, https://tc39.es/proposal-temporal/#sec-temporal.calendar.prototype
    define_direct_property(vm.names.prototype, realm.intrinsics().temporal_calendar_prototype(), 0);

    u8 attr = Attribute::Writable | Attribute::Configurable;
    define_native_function(realm, vm.names.from, from, 1, attr);

    define_direct_property(vm.names.length, Value(1), Attribute::Configurable);

    return {};
}

// 12.2.1 Temporal.Calendar ( id ), https://tc39.es/proposal-temporal/#sec-temporal.calendar
ThrowCompletionOr<Value> CalendarConstructor::call()
{
    auto& vm = this->vm();

    // 1. If NewTarget is undefined, then
    // a. Throw a TypeError exception.
    return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, "Temporal.Calendar");
}

// 12.2.1 Temporal.Calendar ( id ), https://tc39.es/proposal-temporal/#sec-temporal.calendar
ThrowCompletionOr<NonnullGCPtr<Object>> CalendarConstructor::construct(FunctionObject& new_target)
{
    auto& vm = this->vm();

    // 2. Set id to ? ToString(id).
    auto identifier = TRY(vm.argument(0).to_string(vm));

    // 3. If IsBuiltinCalendar(id) is false, then
    if (!is_builtin_calendar(identifier)) {
        // a. Throw a RangeError exception.
        return vm.throw_completion<RangeError>(ErrorType::TemporalInvalidCalendarIdentifier, identifier);
    }

    // 4. Return ? CreateTemporalCalendar(id, NewTarget).
    return *TRY(create_temporal_calendar(vm, identifier, &new_target));
}

// 12.3.2 Temporal.Calendar.from ( calendarLike ), https://tc39.es/proposal-temporal/#sec-temporal.calendar.from
JS_DEFINE_NATIVE_FUNCTION(CalendarConstructor::from)
{
    auto calendar_like = vm.argument(0);

    // 1. Return ? ToTemporalCalendar(calendarLike).
    return TRY(to_temporal_calendar(vm, calendar_like));
}

}