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/*
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCrypto/BigInt/SignedBigInteger.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/Instant.h>
#include <LibJS/Runtime/Temporal/Now.h>
#include <LibJS/Runtime/Temporal/TimeZone.h>
#include <time.h>
namespace JS::Temporal {
// 2 The Temporal.Now Object, https://tc39.es/proposal-temporal/#sec-temporal-now-object
Now::Now(GlobalObject& global_object)
: Object(*global_object.object_prototype())
{
}
void Now::initialize(GlobalObject& global_object)
{
Object::initialize(global_object);
auto& vm = this->vm();
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.timeZone, time_zone, 0, attr);
define_native_function(vm.names.instant, instant, 0, attr);
}
// 2.1.1 Temporal.Now.timeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.timezone
JS_DEFINE_NATIVE_FUNCTION(Now::time_zone)
{
// 1. Return ! SystemTimeZone().
return system_time_zone(global_object);
}
// 2.1.2 Temporal.Now.instant ( ), https://tc39.es/proposal-temporal/#sec-temporal.now.instant
JS_DEFINE_NATIVE_FUNCTION(Now::instant)
{
// 1. Return ! SystemInstant().
return system_instant(global_object);
}
// 2.2.1 SystemTimeZone ( ), https://tc39.es/proposal-temporal/#sec-temporal-systemtimezone
TimeZone* system_time_zone(GlobalObject& global_object)
{
// 1. Let identifier be ! DefaultTimeZone().
auto identifier = default_time_zone();
// 2. Return ! CreateTemporalTimeZone(identifier).
return create_temporal_time_zone(global_object, identifier);
}
// 2.2.2 SystemUTCEpochNanoseconds ( )
BigInt* system_utc_epoch_nanoseconds(GlobalObject& global_object)
{
// 1. Let ns be the approximate current UTC date and time, in nanoseconds since the epoch.
struct timespec now;
clock_gettime(CLOCK_REALTIME, &now);
Checked<i64> ns_timestamp;
ns_timestamp += now.tv_sec;
ns_timestamp *= 1'000'000'000;
ns_timestamp += now.tv_nsec;
if (ns_timestamp.has_overflow()) {
// TODO: Deal with this before 2262-04-21T00:47:16Z.
VERIFY_NOT_REACHED();
}
auto ns = Crypto::SignedBigInteger::create_from(ns_timestamp.value());
// 2. Set ns to the result of clamping ns between −8.64 × 10^21 and 8.64 × 10^21.
// Uhh, these don't even fit in an i64... ¯\_(ツ)_/¯
// 3. Return ℤ(ns).
return js_bigint(global_object.heap(), move(ns));
}
// 2.2.3 SystemInstant ( )
Instant* system_instant(GlobalObject& global_object)
{
// 1. Let ns be ! SystemUTCEpochNanoseconds().
auto* ns = system_utc_epoch_nanoseconds(global_object);
// 2. Return ! CreateTemporalInstant(ns).
return create_temporal_instant(global_object, *ns);
}
}
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