RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 23:17:45 +00:00
Code Issues Activity Actions

LibTimeZone: Add an API to retrieve both daylight and standard offsets

Browse source 
This API will also include the formatted name of the time zone, with
respect for DST (e.g. EST vs EDT for America/New_York).
This commit is contained in:
Timothy Flynn 2022-01-24 12:36:17 -05:00 • committed by Linus Groh
parent fc0c88344b
commit 7103012c7d
4 changed files with 87 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

32
Meta/Lagom/Tools/CodeGenerators/LibTimeZone/GenerateTimeZoneData.cpp
View file

@ -582,6 +582,38 @@ Optional<Offset> get_time_zone_offset(TimeZone time_zone, AK::Time time)
return dst_offset;
}
Optional<Array<NamedOffset, 2>> get_named_time_zone_offsets(TimeZone time_zone, AK::Time time)
{
auto const& time_zone_offset = find_time_zone_offset(time_zone, time);
Array<NamedOffset, 2> named_offsets;
auto format_name = [](auto format, auto offset) -> String {
if (offset == 0)
return s_string_list[format].replace("{}"sv, ""sv);
return String::formatted(s_string_list[format], s_string_list[offset]);
};
auto set_named_offset = [&](auto& named_offset, auto dst_offset, auto in_dst, auto format, auto offset) {
named_offset.seconds = time_zone_offset.offset + dst_offset;
named_offset.in_dst = in_dst;
named_offset.name = format_name(format, offset);
};
if (time_zone_offset.dst_rule != -1) {
auto offsets = find_dst_offsets(time_zone_offset, time);
auto in_dst = offsets[1]->offset == 0 ? InDST::No : InDST::Yes;
set_named_offset(named_offsets[0], offsets[0]->offset, InDST::No, time_zone_offset.standard_format, offsets[0]->format);
set_named_offset(named_offsets[1], offsets[1]->offset, in_dst, time_zone_offset.daylight_format, offsets[1]->format);
} else {
auto in_dst = time_zone_offset.dst_offset == 0 ? InDST::No : InDST::Yes;
set_named_offset(named_offsets[0], time_zone_offset.dst_offset, in_dst, time_zone_offset.standard_format, 0);
set_named_offset(named_offsets[1], time_zone_offset.dst_offset, in_dst, time_zone_offset.daylight_format, 0);
}
return named_offsets;
}
Span<StringView const> all_time_zones()
{
static constexpr auto all_time_zones = Array {