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22 lines
749 B
22 lines
749 B
3 years ago
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import toInteger from '../toInteger/index.js';
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import toDate from '../../toDate/index.js';
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import requiredArgs from '../requiredArgs/index.js'; // This function will be a part of public API when UTC function will be implemented.
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// See issue: https://github.com/date-fns/date-fns/issues/376
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export default function setUTCISODay(dirtyDate, dirtyDay) {
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requiredArgs(2, arguments);
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var day = toInteger(dirtyDay);
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if (day % 7 === 0) {
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day = day - 7;
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}
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var weekStartsOn = 1;
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var date = toDate(dirtyDate);
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var currentDay = date.getUTCDay();
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var remainder = day % 7;
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var dayIndex = (remainder + 7) % 7;
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var diff = (dayIndex < weekStartsOn ? 7 : 0) + day - currentDay;
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date.setUTCDate(date.getUTCDate() + diff);
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return date;
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}
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