pomeranian-durations/lib/add.js

An immutable duration library based on the ISO-8601 format for durations.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.addToDate = exports.addYears = exports.addMonths = exports.addWeeks = exports.addDays = exports.addHours = exports.addMinutes = exports.addSeconds = exports.addMilliseconds = exports.addMicroseconds = exports.sum = exports.add = void 0;

var _utils = require("./_utils");

var _transformations = require("./transformations");

var _validate = require("./validate");

var _constants = require("./constants");

/**
 * Helpers to add to a duration.
 * @name default
 */

/**
 * Adds two iso durations
 * @param firstIsoString {string} - a string to be added
 * @param secondIsoString {string} - a string to be added
 * @example
 * add('PT3S', 'PT1S') // => 'PT4S'
 */
var add = (0, _utils.curry)(function (firstIsoString, secondIsoString) {
  if ((0, _validate.isInvalid)(firstIsoString) || (0, _validate.isInvalid)(secondIsoString)) {
    return _constants.INVALID_DURATION;
  }

  var firstFragments = (0, _transformations.toFragments)(firstIsoString);
  var secondFragments = (0, _transformations.toFragments)(secondIsoString);
  var updatedFragments = Object.keys(firstFragments).reduce(function (acc, unit) {
    acc[unit] = firstFragments[unit] + secondFragments[unit]; // eslint-disable-line no-param-reassign

    return acc;
  }, {});
  return (0, _transformations.toIso)(updatedFragments);
});
/**
 * Sums an array of durations
 * @param durations {array} - a string to be added
 * @example
 * sum(['PT1M', 'PT2M', 'PT3M']) // => 'PT6M'
 */

exports.add = add;

var sum = function sum(durations) {
  return durations.reduce(function (result, current) {
    return add(result, current);
  });
};
/**
 * Adds the given amount of microseconds to the given duration.
 * @param amount {number} - number of microseconds to add
 * @param isoString {string} - a string to be added
 * @example
 * addMicroseconds(1, 'PT1S') // => 'PT1.000001S'
 */


exports.sum = sum;
var addMicroseconds = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "PT".concat(amount / Math.pow(10, 6), "S"));
});
/**
 * Adds the given amount of milliseconds to the given duration.
 * @param amount {number} - number of milliseconds to add
 * @param isoString {string} - a string to be added
 * @example
 * addMilliseconds(1, 'PT1S') // => 'PT1.001S'
 */

exports.addMicroseconds = addMicroseconds;
var addMilliseconds = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "PT".concat(amount / Math.pow(10, 3), "S"));
});
/**
 * Adds the given amount of seconds to the given duration.
 * @param amount {number} - number of seconds to add
 * @param isoString {string} - a string to be added
 * @example
 * addSeconds(1, 'PT1S') // => 'PT2S'
 */

exports.addMilliseconds = addMilliseconds;
var addSeconds = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "PT".concat(amount, "S"));
});
/**
 * Adds the given amount of minutes to the given duration.
 * @param amount {number} - number of minutes to add
 * @param isoString {string} - a string to be added
 * @example
 * addMinutes(1, 'PT1M') // => 'PT2M'
 */

exports.addSeconds = addSeconds;
var addMinutes = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "PT".concat(amount, "M"));
});
/**
 * Adds the given amount of hours to the given duration.
 * @param amount {number} - number of hours to add
 * @param isoString {string} - a string to be added
 * @example
 * addHours(1, 'PT1M') // => 'PT1H1M'
 */

exports.addMinutes = addMinutes;
var addHours = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "PT".concat(amount, "H"));
});
/**
 * Adds the given amount of hours to the given duration.
 * @param amount {number} - number of days to add
 * @param isoString {string} - a string to be added
 * @example
 * addDays(1, 'P1D') // => 'P2D'
 */

exports.addHours = addHours;
var addDays = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "P".concat(amount, "D"));
});
/**
 * Adds the given amount of hours to the given duration.
 * @param amount {number} - number of weeks to add
 * @param isoString {string} - a string to be added
 * @example
 * addWeeks(1, 'P1W') // => 'P2W'
 */

exports.addDays = addDays;
var addWeeks = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "P".concat(amount, "W"));
});
/**
 * Adds the given amount of hours to the given duration.
 * @param amount {number} - number of months to add
 * @param isoString {string} - a string to be added
 * @example
 * addMonths(1, 'P1M') // => 'P2M'
 */

exports.addWeeks = addWeeks;
var addMonths = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "P".concat(amount, "M"));
});
/**
 * Adds the given amount of hours to the given duration.
 * @param amount {number} - number of years to add
 * @param isoString {string} - a string to be added
 * @example
 * addYears(1, 'P1Y') // => 'P2Y'
 */

exports.addMonths = addMonths;
var addYears = (0, _utils.curry)(function (amount, isoString) {
  return add(isoString, "P".concat(amount, "Y"));
});
/**
 * Adds the given iso duration to a date.
 * @param amount {string} - iso duration to be added
 * @param date {Date} - a date to be added to
 * @example
 * addToDate('PT1S', new Date('2000-01-01T00:00:00Z')) // => new Date('2000-01-01T00:00:01Z')
 * @example
 * addToDate('PT1H', new Date('2000-01-01T00:00:00Z')) // => new Date('2000-01-01T01:00:00Z')
 * @example
 * addToDate('P1M', new Date('2000-01-01T00:00:00Z')) // => new Date('2000-02-01T00:00:00Z')
 */

exports.addYears = addYears;
var addToDate = (0, _utils.curry)(function (amount, date) {
  if ((0, _validate.isInvalid)(amount)) {
    return _constants.INVALID_DURATION;
  }

  var dateCopy = new Date(date);
  var fragments = (0, _transformations.toFragments)(amount);
  dateCopy.setSeconds(dateCopy.getSeconds() + fragments.seconds);
  dateCopy.setMinutes(dateCopy.getMinutes() + fragments.minutes);
  dateCopy.setHours(dateCopy.getHours() + fragments.hours);
  dateCopy.setDate(dateCopy.getDate() + fragments.days);
  dateCopy.setDate(dateCopy.getDate() + fragments.weeks * 7);
  dateCopy.setMonth(dateCopy.getMonth() + fragments.months);
  dateCopy.setFullYear(dateCopy.getFullYear() + fragments.years);
  return dateCopy;
});
exports.addToDate = addToDate;