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LibJS+LibUnicode: Port retrieving available regional time zones to ICU

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Timothy Flynn 2024-06-25 11:33:26 -04:00 • committed by Andreas Kling
commit 1b2d47e6bb
Notes: sideshowbarker 2024-07-17 09:56:35 +09:00
4 changed files with 41 additions and 20 deletions
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39
Userland/Libraries/LibUnicode/TimeZone.cpp
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@ -76,26 +76,35 @@ static constexpr bool is_legacy_non_iana_time_zone(StringView time_zone)
return legacy_zones.contains_slow(time_zone);
}
static Vector<String> icu_available_time_zones(Optional<ByteString> const& region)
{
UErrorCode status = U_ZERO_ERROR;
char const* icu_region = region.has_value() ? region->characters() : nullptr;
auto time_zone_enumerator = adopt_own_if_nonnull(icu::TimeZone::createTimeZoneIDEnumeration(UCAL_ZONE_TYPE_ANY, icu_region, nullptr, status));
if (icu_failure(status))
return { "UTC"_string };
auto time_zones = icu_string_enumeration_to_list(move(time_zone_enumerator), [](char const* zone) {
return !is_legacy_non_iana_time_zone({ zone, strlen(zone) });
});
quick_sort(time_zones);
return time_zones;
}
Vector<String> const& available_time_zones()
{
static auto time_zones = []() -> Vector<String> {
UErrorCode status = U_ZERO_ERROR;
auto time_zone_enumerator = adopt_own_if_nonnull(icu::TimeZone::createEnumeration(status));
if (icu_failure(status))
return { "UTC"_string };
auto time_zones = icu_string_enumeration_to_list(move(time_zone_enumerator), [](char const* zone) {
return !is_legacy_non_iana_time_zone({ zone, strlen(zone) });
});
quick_sort(time_zones);
return time_zones;
}();
static auto time_zones = icu_available_time_zones({});
return time_zones;
}
Vector<String> available_time_zones_in_region(StringView region)
{
return icu_available_time_zones(region);
}
Optional<String> resolve_primary_time_zone(StringView time_zone)
{
UErrorCode status = U_ZERO_ERROR;