{"ast":null,"code":"import { constructFrom } from \"./constructFrom.mjs\";\nimport { startOfWeek } from \"./startOfWeek.mjs\";\nimport { toDate } from \"./toDate.mjs\";\nimport { getDefaultOptions } from \"./_lib/defaultOptions.mjs\";\n\n/**\n * The {@link getWeekYear} function options.\n */\n\n/**\n * @name getWeekYear\n * @category Week-Numbering Year Helpers\n * @summary Get the local week-numbering year of the given date.\n *\n * @description\n * Get the local week-numbering year of the given date.\n * The exact calculation depends on the values of\n * `options.weekStartsOn` (which is the index of the first day of the week)\n * and `options.firstWeekContainsDate` (which is the day of January, which is always in\n * the first week of the week-numbering year)\n *\n * Week numbering: https://en.wikipedia.org/wiki/Week#The_ISO_week_date_system\n *\n * @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).\n *\n * @param date - The given date\n * @param options - An object with options.\n *\n * @returns The local week-numbering year\n *\n * @example\n * // Which week numbering year is 26 December 2004 with the default settings?\n * const result = getWeekYear(new Date(2004, 11, 26))\n * //=> 2005\n *\n * @example\n * // Which week numbering year is 26 December 2004 if week starts on Saturday?\n * const result = getWeekYear(new Date(2004, 11, 26), { weekStartsOn: 6 })\n * //=> 2004\n *\n * @example\n * // Which week numbering year is 26 December 2004 if the first week contains 4 January?\n * const result = getWeekYear(new Date(2004, 11, 26), { firstWeekContainsDate: 4 })\n * //=> 2004\n */\nexport function getWeekYear(date, options) {\n  const _date = toDate(date);\n  const year = _date.getFullYear();\n  const defaultOptions = getDefaultOptions();\n  const firstWeekContainsDate = options?.firstWeekContainsDate ?? options?.locale?.options?.firstWeekContainsDate ?? defaultOptions.firstWeekContainsDate ?? defaultOptions.locale?.options?.firstWeekContainsDate ?? 1;\n  const firstWeekOfNextYear = constructFrom(date, 0);\n  firstWeekOfNextYear.setFullYear(year + 1, 0, firstWeekContainsDate);\n  firstWeekOfNextYear.setHours(0, 0, 0, 0);\n  const startOfNextYear = startOfWeek(firstWeekOfNextYear, options);\n  const firstWeekOfThisYear = constructFrom(date, 0);\n  firstWeekOfThisYear.setFullYear(year, 0, firstWeekContainsDate);\n  firstWeekOfThisYear.setHours(0, 0, 0, 0);\n  const startOfThisYear = startOfWeek(firstWeekOfThisYear, options);\n  if (_date.getTime() >= startOfNextYear.getTime()) {\n    return year + 1;\n  } else if (_date.getTime() >= startOfThisYear.getTime()) {\n    return year;\n  } else {\n    return year - 1;\n  }\n}\n\n// Fallback for modularized imports:\nexport default getWeekYear;","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}