LibJS: Implement the Temporal.PlainMonthDay constructor

And the simple Temporal.PlainMonthDay.prototype getters, so that the
constructed Temporal.PlainMonthDay may actually be validated.
This commit is contained in:
Timothy Flynn 2024-11-20 12:59:15 -05:00 committed by Tim Flynn
commit 1a386e78c3
Notes: github-actions[bot] 2024-11-22 00:25:44 +00:00
31 changed files with 2515 additions and 4 deletions

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/*
* Copyright (c) 2021-2023, Linus Groh <linusg@serenityos.org>
* Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
* Copyright (c) 2024, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Date.h>
#include <LibJS/Runtime/Intl/AbstractOperations.h>
#include <LibJS/Runtime/Temporal/ISO8601.h>
#include <LibJS/Runtime/Temporal/TimeZone.h>
#include <LibJS/Runtime/VM.h>
namespace JS::Temporal {
// 11.1.5 FormatOffsetTimeZoneIdentifier ( offsetMinutes [ , style ] ), https://tc39.es/proposal-temporal/#sec-temporal-formatoffsettimezoneidentifier
String format_offset_time_zone_identifier(i64 offset_minutes, Optional<TimeStyle> style)
{
// 1. If offsetMinutes ≥ 0, let sign be the code unit 0x002B (PLUS SIGN); otherwise, let sign be the code unit 0x002D (HYPHEN-MINUS).
auto sign = offset_minutes >= 0 ? '+' : '-';
// 2. Let absoluteMinutes be abs(offsetMinutes).
auto absolute_minutes = abs(offset_minutes);
// 3. Let hour be floor(absoluteMinutes / 60).
auto hour = static_cast<u8>(floor(static_cast<double>(absolute_minutes) / 60.0));
// 4. Let minute be absoluteMinutes modulo 60.
auto minute = static_cast<u8>(modulo(static_cast<double>(absolute_minutes), 60.0));
// 5. Let timeString be FormatTimeString(hour, minute, 0, 0, MINUTE, style).
auto time_string = format_time_string(hour, minute, 0, 0, SecondsStringPrecision::Minute {}, style);
// 6. Return the string-concatenation of sign and timeString.
return MUST(String::formatted("{}{}", sign, time_string));
}
// 11.1.8 ToTemporalTimeZoneIdentifier ( temporalTimeZoneLike ), https://tc39.es/proposal-temporal/#sec-temporal-totemporaltimezoneidentifier
ThrowCompletionOr<String> to_temporal_time_zone_identifier(VM& vm, Value temporal_time_zone_like)
{
// 1. If temporalTimeZoneLike is an Object, then
if (temporal_time_zone_like.is_object()) {
// FIXME: a. If temporalTimeZoneLike has an [[InitializedTemporalZonedDateTime]] internal slot, then
// FIXME: i. Return temporalTimeZoneLike.[[TimeZone]].
}
// 2. If temporalTimeZoneLike is not a String, throw a TypeError exception.
if (!temporal_time_zone_like.is_string())
return vm.throw_completion<TypeError>(ErrorType::TemporalInvalidTimeZoneName, temporal_time_zone_like);
// 3. Let parseResult be ? ParseTemporalTimeZoneString(temporalTimeZoneLike).
auto parse_result = TRY(parse_temporal_time_zone_string(vm, temporal_time_zone_like.as_string().utf8_string_view()));
// 4. Let offsetMinutes be parseResult.[[OffsetMinutes]].
// 5. If offsetMinutes is not empty, return FormatOffsetTimeZoneIdentifier(offsetMinutes).
if (parse_result.offset_minutes.has_value())
return format_offset_time_zone_identifier(*parse_result.offset_minutes);
// 6. Let name be parseResult.[[Name]].
// 7. Let timeZoneIdentifierRecord be GetAvailableNamedTimeZoneIdentifier(name).
auto time_zone_identifier_record = Intl::get_available_named_time_zone_identifier(*parse_result.name);
// 8. If timeZoneIdentifierRecord is empty, throw a RangeError exception.
if (!time_zone_identifier_record.has_value())
return vm.throw_completion<RangeError>(ErrorType::TemporalInvalidTimeZoneName, temporal_time_zone_like);
// 9. Return timeZoneIdentifierRecord.[[Identifier]].
return time_zone_identifier_record->identifier;
}
// 11.1.16 ParseTimeZoneIdentifier ( identifier ), https://tc39.es/proposal-temporal/#sec-parsetimezoneidentifier
ThrowCompletionOr<TimeZone> parse_time_zone_identifier(VM& vm, StringView identifier)
{
// 1. Let parseResult be ParseText(StringToCodePoints(identifier), TimeZoneIdentifier).
auto parse_result = parse_iso8601(Production::TimeZoneIdentifier, identifier);
// 2. If parseResult is a List of errors, throw a RangeError exception.
if (!parse_result.has_value())
return vm.throw_completion<RangeError>(ErrorType::TemporalInvalidTimeZoneString, identifier);
return parse_time_zone_identifier(*parse_result);
}
// 11.1.16 ParseTimeZoneIdentifier ( identifier ), https://tc39.es/proposal-temporal/#sec-parsetimezoneidentifier
TimeZone parse_time_zone_identifier(StringView identifier)
{
// OPTIMIZATION: Some callers can assume that parsing will succeed.
// 1. Let parseResult be ParseText(StringToCodePoints(identifier), TimeZoneIdentifier).
auto parse_result = parse_iso8601(Production::TimeZoneIdentifier, identifier);
VERIFY(parse_result.has_value());
return parse_time_zone_identifier(*parse_result);
}
// 11.1.16 ParseTimeZoneIdentifier ( identifier ), https://tc39.es/proposal-temporal/#sec-parsetimezoneidentifier
TimeZone parse_time_zone_identifier(ParseResult const& parse_result)
{
// OPTIMIZATION: Some callers will have already parsed and validated the time zone identifier.
// 3. If parseResult contains a TimeZoneIANAName Parse Node, then
if (parse_result.time_zone_iana_name.has_value()) {
// a. Let name be the source text matched by the TimeZoneIANAName Parse Node contained within parseResult.
// b. NOTE: name is syntactically valid, but does not necessarily conform to IANA Time Zone Database naming
// guidelines or correspond with an available named time zone identifier.
// c. Return the Record { [[Name]]: CodePointsToString(name), [[OffsetMinutes]]: empty }.
return TimeZone { .name = String::from_utf8_without_validation(parse_result.time_zone_iana_name->bytes()), .offset_minutes = {} };
}
// 4. Else,
else {
// a. Assert: parseResult contains a UTCOffset[~SubMinutePrecision] Parse Node.
VERIFY(parse_result.time_zone_offset.has_value());
// b. Let offsetString be the source text matched by the UTCOffset[~SubMinutePrecision] Parse Node contained within parseResult.
// c. Let offsetNanoseconds be ! ParseDateTimeUTCOffset(offsetString).
// FIXME: ParseTimeZoneOffsetString should be renamed to ParseDateTimeUTCOffset and updated for Temporal.
auto offset_nanoseconds = parse_time_zone_offset_string(parse_result.time_zone_offset->source_text);
// d. Let offsetMinutes be offsetNanoseconds / (60 × 10**9).
auto offset_minutes = offset_nanoseconds / 60'000'000'000;
// e. Assert: offsetMinutes is an integer.
VERIFY(trunc(offset_minutes) == offset_minutes);
// f. Return the Record { [[Name]]: empty, [[OffsetMinutes]]: offsetMinutes }.
return TimeZone { .name = {}, .offset_minutes = static_cast<i64>(offset_minutes) };
}
}
}