pomeranian-durations/lib/subtract.js

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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.subtractFromDate = exports.subtractYears = exports.subtractMonths = exports.subtractWeeks = exports.subtractDays = exports.subtractHours = exports.subtractMinutes = exports.subtractSeconds = exports.subtractMicroseconds = exports.subtractMilliseconds = exports.subtract = void 0;

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

var _add = require("./add");

var _math = require("./math");

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

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

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

/**
 * Helpers to subtract from a duration.
 * @name default
 */

/**
 * Subtracts the given iso duration from the given duration.
 * @param firstDuration {string} - a duration to be subtracted
 * @param secondDuration {string} - a duration to be subtracted
 * @example
 * subtract('PT2M', 'PT1M') // => 'PT1M'
 */
var subtract = (0, _utils.curry)(function (firstDuration, secondDurations) {
  var secondFragments = (0, _transformations.toFragments)(secondDurations);
  var negativeFragments = Object.keys(secondFragments).reduce(function (acc, unit) {
    acc[unit] = (0, _utils.negate)(secondFragments[unit]); // eslint-disable-line no-param-reassign

    return acc;
  }, {});
  return (0, _add.add)(firstDuration, (0, _transformations.toIso)(negativeFragments));
});
/**
 * Subtracts the given amount of milliseconds from the given duration.
 * @param amount {number} - number of milliseconds to be subtracted
 * @param isoString {string} - a duration to be subtracted
 * @example
 * subtractMilliseconds(1, 'PT2M') // => 'PT2M-0.001S'
 */

exports.subtract = subtract;
var subtractMilliseconds = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addMilliseconds)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of microseconds to microseconds from the duration.
 * @param amount {number} - number of microseconds to be subtracted
 * @param isoString {string} - a duration to be subtracted
 * @example
 * subtractMicroseconds(1, 'PT2M') // => 'PT2M-0.000001S'
 */

exports.subtractMilliseconds = subtractMilliseconds;
var subtractMicroseconds = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addMicroseconds)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of microseconds seconds from the given duration.
 * @param amount {number} - number of microseconds toseconds subtract
 * @param isoString {string} - a duration to be subtracted
 * @example
 * subtractSeconds(1, 'PT2S') // => 'PT1S'
 */

exports.subtractMicroseconds = subtractMicroseconds;
var subtractSeconds = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addSeconds)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of microseconds minutes frome given duration.
 * @param amount {number} - number of microseconds tominutes subtract
 * @param isoString {string} - a duration to be subtracted
 * @example
 * subtractMinutes(1, 'PT2M') // => 'PT1M'
 */

exports.subtractSeconds = subtractSeconds;
var subtractMinutes = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addMinutes)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of hours from the given duration.
 * @param amount {number} - number of hours to subtract
 * @param isoString {string} - a duration to be subtracted
 * @example
 * subtractHours(1, 'PT2H') // => 'PT1H'
 */

exports.subtractMinutes = subtractMinutes;
var subtractHours = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addHours)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of days from the given duration.
 * @param amount {number} - number ofdays microseconds to subtract
 * @param isoString {string} - a duration to be subtracted
 * @example
 * subtractDays(1, 'P2D') // => 'P1D'
 */

exports.subtractHours = subtractHours;
var subtractDays = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addDays)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of weeks from the given duration.
 * @param amount {number} - number of weeks to subtract
 * @param isoString {string} - a string to be added
 * @example
 * subtractWeeks(1, 'P2W') // => 'P1W'
 */

exports.subtractDays = subtractDays;
var subtractWeeks = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addWeeks)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts the given amount of microseconds months frome given duration.
 * @param amount {number} - number of microseconds tmonths subtract
 * @param isoString {string} - a string to be added
 * @example
 * subtractMonths(1, 'P2M') // => 'P1M'
 */

exports.subtractWeeks = subtractWeeks;
var subtractMonths = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addMonths)((0, _utils.negate)(amount), isoString);
});
/**
 * 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
 * subtractYears(1, 'P2Y') // => 'P1Y'
 */

exports.subtractMonths = subtractMonths;
var subtractYears = (0, _utils.curry)(function (amount, isoString) {
  return (0, _add.addYears)((0, _utils.negate)(amount), isoString);
});
/**
 * Subtracts an iso duration from a js date.
 * @param amount {string} - iso duration to be subtracted
 * @param date {Date} - a date to be subtracted from
 * @example
 * subtractFromDate('PT1S', new Date('2000-01-01T00:00:00Z')) // => new Date('1999-12-31T23:59:59Z')
 */

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

  return (0, _add.addToDate)((0, _math.invert)(amount), date);
});
exports.subtractFromDate = subtractFromDate;