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LibJS: Implement Intl.Locale.prototype.weekInfo property

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Timothy Flynn 2022-07-06 08:30:53 -04:00 • committed by Linus Groh
parent 12e7c0808a
commit b3deec061e
6 changed files with 172 additions and 0 deletions
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61
Userland/Libraries/LibJS/Runtime/Intl/Locale.cpp
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@ -9,6 +9,7 @@
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/Locale.h>
#include <LibTimeZone/TimeZone.h>
#include <LibUnicode/DateTimeFormat.h>
#include <LibUnicode/Locale.h>
namespace JS::Intl {
@ -186,4 +187,64 @@ StringView character_direction_of_locale(Locale const& locale_object)
return "ltr"sv;
}
static u8 weekday_to_integer(Optional<Unicode::Weekday> weekday, Unicode::Weekday falllback)
{
// NOTE: This fallback will be used if LibUnicode data generation is disabled. Its value should
// be that of the default region ("001") in the CLDR.
switch (weekday.value_or(falllback)) {
case Unicode::Weekday::Monday:
return 1;
case Unicode::Weekday::Tuesday:
return 2;
case Unicode::Weekday::Wednesday:
return 3;
case Unicode::Weekday::Thursday:
return 4;
case Unicode::Weekday::Friday:
return 5;
case Unicode::Weekday::Saturday:
return 6;
case Unicode::Weekday::Sunday:
return 7;
}
VERIFY_NOT_REACHED();
}
static Vector<u8> weekend_of_locale(StringView locale)
{
auto weekend_start = weekday_to_integer(Unicode::get_locale_weekend_start(locale), Unicode::Weekday::Saturday);
auto weekend_end = weekday_to_integer(Unicode::get_locale_weekend_end(locale), Unicode::Weekday::Sunday);
// There currently aren't any regions in the CLDR which wrap around from Sunday (7) to Monday (1).
// If this changes, this logic will need to be updated to handle that.
VERIFY(weekend_start <= weekend_end);
Vector<u8> weekend;
weekend.ensure_capacity(weekend_end - weekend_start + 1);
for (auto day = weekend_start; day <= weekend_end; ++day)
weekend.unchecked_append(day);
return weekend;
}
// 1.1.8 WeekInfoOfLocale ( loc ), https://tc39.es/proposal-intl-locale-info/#sec-week-info-of-locale
WeekInfo week_info_of_locale(Locale const& locale_object)
{
// 1. Let locale be loc.[[Locale]].
auto const& locale = locale_object.locale();
// 2. Assert: locale matches the unicode_locale_id production.
VERIFY(Unicode::parse_unicode_locale_id(locale).has_value());
// 3. Return a record whose fields are defined by Table 1, with values based on locale.
WeekInfo week_info {};
week_info.minimal_days = Unicode::get_locale_minimum_days(locale).value_or(1);
week_info.first_day = weekday_to_integer(Unicode::get_locale_first_day(locale), Unicode::Weekday::Monday);
week_info.weekend = weekend_of_locale(locale);
return week_info;
}
}