Current File : /var/www/html/node_modules/date-fns/esm/_lib/getUTCISOWeekYear/index.js
import toDate from "../../toDate/index.js";
import requiredArgs from "../requiredArgs/index.js";
import startOfUTCISOWeek from "../startOfUTCISOWeek/index.js"; // This function will be a part of public API when UTC function will be implemented.
// See issue: https://github.com/date-fns/date-fns/issues/376
export default function getUTCISOWeekYear(dirtyDate) {
requiredArgs(1, arguments);
var date = toDate(dirtyDate);
var year = date.getUTCFullYear();
var fourthOfJanuaryOfNextYear = new Date(0);
fourthOfJanuaryOfNextYear.setUTCFullYear(year + 1, 0, 4);
fourthOfJanuaryOfNextYear.setUTCHours(0, 0, 0, 0);
var startOfNextYear = startOfUTCISOWeek(fourthOfJanuaryOfNextYear);
var fourthOfJanuaryOfThisYear = new Date(0);
fourthOfJanuaryOfThisYear.setUTCFullYear(year, 0, 4);
fourthOfJanuaryOfThisYear.setUTCHours(0, 0, 0, 0);
var startOfThisYear = startOfUTCISOWeek(fourthOfJanuaryOfThisYear);
if (date.getTime() >= startOfNextYear.getTime()) {
return year + 1;
} else if (date.getTime() >= startOfThisYear.getTime()) {
return year;
} else {
return year - 1;
}
}
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