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20 lines
1.1 KiB
20 lines
1.1 KiB
3 years ago
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import toInteger from '../toInteger/index.js';
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import getUTCWeekYear from '../getUTCWeekYear/index.js';
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import startOfUTCWeek from '../startOfUTCWeek/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 startOfUTCWeekYear(dirtyDate, dirtyOptions) {
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requiredArgs(1, arguments);
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var options = dirtyOptions || {};
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var locale = options.locale;
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var localeFirstWeekContainsDate = locale && locale.options && locale.options.firstWeekContainsDate;
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var defaultFirstWeekContainsDate = localeFirstWeekContainsDate == null ? 1 : toInteger(localeFirstWeekContainsDate);
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var firstWeekContainsDate = options.firstWeekContainsDate == null ? defaultFirstWeekContainsDate : toInteger(options.firstWeekContainsDate);
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var year = getUTCWeekYear(dirtyDate, dirtyOptions);
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var firstWeek = new Date(0);
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firstWeek.setUTCFullYear(year, 0, firstWeekContainsDate);
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firstWeek.setUTCHours(0, 0, 0, 0);
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var date = startOfUTCWeek(firstWeek, dirtyOptions);
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return date;
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}
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