LocalWeekYearParser.mjs
1.68 KB
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import { getWeekYear } from "../../../getWeekYear.mjs";
import { startOfWeek } from "../../../startOfWeek.mjs";
import { Parser } from "../Parser.mjs";
import { mapValue, normalizeTwoDigitYear, parseNDigits } from "../utils.mjs";
// Local week-numbering year
export class LocalWeekYearParser extends Parser {
priority = 130;
parse(dateString, token, match) {
const valueCallback = (year) => ({
year,
isTwoDigitYear: token === "YY",
});
switch (token) {
case "Y":
return mapValue(parseNDigits(4, dateString), valueCallback);
case "Yo":
return mapValue(
match.ordinalNumber(dateString, {
unit: "year",
}),
valueCallback,
);
default:
return mapValue(parseNDigits(token.length, dateString), valueCallback);
}
}
validate(_date, value) {
return value.isTwoDigitYear || value.year > 0;
}
set(date, flags, value, options) {
const currentYear = getWeekYear(date, options);
if (value.isTwoDigitYear) {
const normalizedTwoDigitYear = normalizeTwoDigitYear(
value.year,
currentYear,
);
date.setFullYear(
normalizedTwoDigitYear,
0,
options.firstWeekContainsDate,
);
date.setHours(0, 0, 0, 0);
return startOfWeek(date, options);
}
const year =
!("era" in flags) || flags.era === 1 ? value.year : 1 - value.year;
date.setFullYear(year, 0, options.firstWeekContainsDate);
date.setHours(0, 0, 0, 0);
return startOfWeek(date, options);
}
incompatibleTokens = [
"y",
"R",
"u",
"Q",
"q",
"M",
"L",
"I",
"d",
"D",
"i",
"t",
"T",
];
}