index.js
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import addDays from '../addDays/index.js';
import addMonths from '../addMonths/index.js';
import toDate from '../toDate/index.js';
import requiredArgs from '../_lib/requiredArgs/index.js';
import toInteger from '../_lib/toInteger/index.js';
/**
* @name add
* @category Common Helpers
* @summary Add the specified years, months, weeks, days, hours, minutes and seconds to the given date.
*
* @description
* Add the specified years, months, weeks, days, hours, minutes and seconds to the given date.
*
* @param {Date|Number} date - the date to be changed
* @param {Duration} duration - the object with years, months, weeks, days, hours, minutes and seconds to be added. Positive decimals will be rounded using `Math.floor`, decimals less than zero will be rounded using `Math.ceil`.
*
* | Key | Description |
* |----------------|------------------------------------|
* | years | Amount of years to be added |
* | months | Amount of months to be added |
* | weeks | Amount of weeks to be added |
* | days | Amount of days to be added |
* | hours | Amount of hours to be added |
* | minutes | Amount of minutes to be added |
* | seconds | Amount of seconds to be added |
*
* All values default to 0
*
* @returns {Date} the new date with the seconds added
* @throws {TypeError} 2 arguments required
*
* @example
* // Add the following duration to 1 September 2014, 10:19:50
* var result = add(new Date(2014, 8, 1, 10, 19, 50), {
* years: 2,
* months: 9,
* weeks: 1,
* days: 7,
* hours: 5,
* minutes: 9,
* seconds: 30,
* })
* //=> Thu Jun 15 2017 15:29:20
*/
export default function add(dirtyDate, duration) {
requiredArgs(2, arguments);
if (!duration || typeof duration !== 'object') return new Date(NaN);
var years = 'years' in duration ? toInteger(duration.years) : 0;
var months = 'months' in duration ? toInteger(duration.months) : 0;
var weeks = 'weeks' in duration ? toInteger(duration.weeks) : 0;
var days = 'days' in duration ? toInteger(duration.days) : 0;
var hours = 'hours' in duration ? toInteger(duration.hours) : 0;
var minutes = 'minutes' in duration ? toInteger(duration.minutes) : 0;
var seconds = 'seconds' in duration ? toInteger(duration.seconds) : 0; // Add years and months
var date = toDate(dirtyDate);
var dateWithMonths = months || years ? addMonths(date, months + years * 12) : date; // Add weeks and days
var dateWithDays = days || weeks ? addDays(dateWithMonths, days + weeks * 7) : dateWithMonths; // Add days, hours, minutes and seconds
var minutesToAdd = minutes + hours * 60;
var secondsToAdd = seconds + minutesToAdd * 60;
var msToAdd = secondsToAdd * 1000;
var finalDate = new Date(dateWithDays.getTime() + msToAdd);
return finalDate;
}