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Diffstat (limited to 'node_modules/date-fns/esm/addBusinessDays/index.js')
| -rw-r--r-- | node_modules/date-fns/esm/addBusinessDays/index.js | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/node_modules/date-fns/esm/addBusinessDays/index.js b/node_modules/date-fns/esm/addBusinessDays/index.js new file mode 100644 index 0000000..cf59e96 --- /dev/null +++ b/node_modules/date-fns/esm/addBusinessDays/index.js @@ -0,0 +1,58 @@ +import isWeekend from "../isWeekend/index.js"; +import toDate from "../toDate/index.js"; +import toInteger from "../_lib/toInteger/index.js"; +import requiredArgs from "../_lib/requiredArgs/index.js"; +import isSunday from "../isSunday/index.js"; +import isSaturday from "../isSaturday/index.js"; +/** + * @name addBusinessDays + * @category Day Helpers + * @summary Add the specified number of business days (mon - fri) to the given date. + * + * @description + * Add the specified number of business days (mon - fri) to the given date, ignoring weekends. + * + * @param {Date|Number} date - the date to be changed + * @param {Number} amount - the amount of business days to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`. + * @returns {Date} the new date with the business days added + * @throws {TypeError} 2 arguments required + * + * @example + * // Add 10 business days to 1 September 2014: + * const result = addBusinessDays(new Date(2014, 8, 1), 10) + * //=> Mon Sep 15 2014 00:00:00 (skipped weekend days) + */ +export default function addBusinessDays(dirtyDate, dirtyAmount) { + requiredArgs(2, arguments); + var date = toDate(dirtyDate); + var startedOnWeekend = isWeekend(date); + var amount = toInteger(dirtyAmount); + if (isNaN(amount)) return new Date(NaN); + var hours = date.getHours(); + var sign = amount < 0 ? -1 : 1; + var fullWeeks = toInteger(amount / 5); + date.setDate(date.getDate() + fullWeeks * 7); + + // Get remaining days not part of a full week + var restDays = Math.abs(amount % 5); + + // Loops over remaining days + while (restDays > 0) { + date.setDate(date.getDate() + sign); + if (!isWeekend(date)) restDays -= 1; + } + + // If the date is a weekend day and we reduce a dividable of + // 5 from it, we land on a weekend date. + // To counter this, we add days accordingly to land on the next business day + if (startedOnWeekend && isWeekend(date) && amount !== 0) { + // If we're reducing days, we want to add days until we land on a weekday + // If we're adding days we want to reduce days until we land on a weekday + if (isSaturday(date)) date.setDate(date.getDate() + (sign < 0 ? 2 : -1)); + if (isSunday(date)) date.setDate(date.getDate() + (sign < 0 ? 1 : -2)); + } + + // Restore hours to avoid DST lag + date.setHours(hours); + return date; +}
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