LibTimeZone+Userland: Change timezone functions to use UnixDateTime

This incurs a whole host of changes in, among others, JavaScript Intl
and Date.

3 files changed, 6 insertions, 6 deletions

diff --git a/Userland/Libraries/LibJS/Runtime/Date.cpp b/Userland/Libraries/LibJS/Runtime/Date.cpp
index d5a92b64c5..df1ff90e3f 100644
--- a/Userland/Libraries/LibJS/Runtime/Date.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Date.cpp
@@ -314,7 +314,7 @@ static i64 clip_bigint_to_sane_time(Crypto::SignedBigInteger const& value)
 Vector<Crypto::SignedBigInteger> get_named_time_zone_epoch_nanoseconds(StringView time_zone_identifier, i32 year, u8 month, u8 day, u8 hour, u8 minute, u8 second, u16 millisecond, u16 microsecond, u16 nanosecond)
 {
     auto local_nanoseconds = get_utc_epoch_nanoseconds(year, month, day, hour, minute, second, millisecond, microsecond, nanosecond);
-    auto local_time = Duration::from_nanoseconds(clip_bigint_to_sane_time(local_nanoseconds));
+    auto local_time = UnixDateTime::from_nanoseconds_since_epoch(clip_bigint_to_sane_time(local_nanoseconds));
 
     // FIXME: LibTimeZone does not behave exactly as the spec expects. It does not consider repeated or skipped time points.
     auto offset = TimeZone::get_time_zone_offset(time_zone_identifier, local_time);
@@ -332,10 +332,10 @@ i64 get_named_time_zone_offset_nanoseconds(StringView time_zone_identifier, Cryp
     auto time_zone = TimeZone::time_zone_from_string(time_zone_identifier);
     VERIFY(time_zone.has_value());
 
-    // Since Duration::from_seconds() and Duration::from_nanoseconds() both take an i64, converting to
+    // Since UnixDateTime::from_seconds_since_epoch() and UnixDateTime::from_nanoseconds_since_epoch() both take an i64, converting to
     // seconds first gives us a greater range. The TZDB doesn't have sub-second offsets.
     auto seconds = epoch_nanoseconds.divided_by(s_one_billion_bigint).quotient;
-    auto time = Duration::from_seconds(clip_bigint_to_sane_time(seconds));
+    auto time = UnixDateTime::from_seconds_since_epoch(clip_bigint_to_sane_time(seconds));
 
     auto offset = TimeZone::get_time_zone_offset(*time_zone, time);
     VERIFY(offset.has_value());
diff --git a/Userland/Libraries/LibJS/Runtime/DatePrototype.cpp b/Userland/Libraries/LibJS/Runtime/DatePrototype.cpp
index 04c952d8cb..d7d5d05fd4 100644
--- a/Userland/Libraries/LibJS/Runtime/DatePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/DatePrototype.cpp
@@ -1164,7 +1164,7 @@ DeprecatedString time_zone_string(double time)
     auto tz_name = TimeZone::current_time_zone();
 
     // Most implementations seem to prefer the long-form display name of the time zone. Not super important, but we may as well match that behavior.
-    if (auto maybe_offset = TimeZone::get_time_zone_offset(tz_name, AK::Duration::from_milliseconds(time)); maybe_offset.has_value()) {
+    if (auto maybe_offset = TimeZone::get_time_zone_offset(tz_name, AK::UnixDateTime::from_milliseconds_since_epoch(time)); maybe_offset.has_value()) {
         if (auto long_name = Locale::get_time_zone_name(Locale::default_locale(), tz_name, Locale::CalendarPatternStyle::Long, maybe_offset->in_dst); long_name.has_value())
             tz_name = long_name.release_value();
     }
diff --git a/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.h b/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.h
index 0a36dc1d9a..6f7720c803 100644
--- a/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.h
+++ b/Userland/Libraries/LibJS/Runtime/Intl/DateTimeFormat.h
@@ -162,9 +162,9 @@ enum class OptionDefaults {
 // Table 8: Record returned by ToLocalTime, https://tc39.es/ecma402/#table-datetimeformat-tolocaltime-record
 // Note: [[InDST]] is not included here - it is handled by LibUnicode / LibTimeZone.
 struct LocalTime {
-    AK::Duration time_since_epoch() const
+    AK::UnixDateTime time_since_epoch() const
     {
-        return AK::Duration::from_timestamp(year, month + 1, day + 1, hour, minute, second, millisecond);
+        return AK::UnixDateTime::from_unix_time_parts(year, month + 1, day + 1, hour, minute, second, millisecond);
     }
 
     int weekday { 0 };     // [[Weekday]]