pomeranian-durations/lib/floor.js

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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.floorYears = exports.floorMonths = exports.floorWeeks = exports.floorDays = exports.floorHours = exports.floorMinutes = exports.floorSeconds = exports.floor = void 0;

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

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

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

/**
 * Helpers to floor an ISO8601 duration to a particular granularity.
 * @name default
 */
var ALL_UNITS = [_constants.UNIT_NAMES.seconds, _constants.UNIT_NAMES.minutes, _constants.UNIT_NAMES.hours, _constants.UNIT_NAMES.days, _constants.UNIT_NAMES.weeks, _constants.UNIT_NAMES.months, _constants.UNIT_NAMES.years];

var createFloorFnFor = function createFloorFnFor(unit) {
  return function (isoString) {
    if ((0, _validate.isInvalid)(isoString)) {
      return _constants.INVALID_DURATION;
    }

    var fragments = (0, _transformations.toFragments)(isoString);
    var unitsToBeNullified = ALL_UNITS.slice(0, ALL_UNITS.indexOf(unit));
    var flooredFragments = unitsToBeNullified.reduce(function (acc, currentUnit) {
      acc[currentUnit] = 0; // eslint-disable-line no-param-reassign

      return acc;
    }, fragments);
    flooredFragments[unit] = Math.floor(fragments[unit]);
    return (0, _transformations.toIso)(flooredFragments);
  };
};
/**
 * Floor a duration by a given granularity.
 * @param granularity {string} - ISO8601 duration
 * @param isoString {string} - ISO8601 duration
 * @example
 * floor('PT2s', 'PT5S') // => 'PT4S'
 * @example
 * floor('PT3s', 'PT5S') // => 'PT3S'
 * @example
 * floor('PT4s', 'PT5S') // => 'PT4S'
 */


var floor = function floor(granularity, isoString) {
  var durationAsFragments = (0, _transformations.toFragments)(isoString);
  var granularityAsFragments = (0, _transformations.toFragments)(granularity);
  var flooredFragments = ALL_UNITS.reduce(function (acc, currentUnit) {
    if (!durationAsFragments[currentUnit] || !granularityAsFragments[currentUnit]) {
      return acc;
    }

    acc[currentUnit] = durationAsFragments[currentUnit] - // eslint-disable-line no-param-reassign
    durationAsFragments[currentUnit] % granularityAsFragments[currentUnit];
    return acc;
  }, {});
  return (0, _transformations.toIso)(flooredFragments);
};
/**
 * Floor a given ISO duration to the current second.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorSeconds('PT1.1S') // => 'PT1S'
 */


exports.floor = floor;
var floorSeconds = createFloorFnFor(_constants.UNIT_NAMES.seconds);
/**
 * Floor a given ISO duration to the current minute.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorMinutes('PT1.1M') // => 'PT1M'
 */

exports.floorSeconds = floorSeconds;
var floorMinutes = createFloorFnFor(_constants.UNIT_NAMES.minutes);
/**
 * Floor a given ISO duration to the current hour.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorHours('PT1.1H') // => 'PT1H'
 */

exports.floorMinutes = floorMinutes;
var floorHours = createFloorFnFor(_constants.UNIT_NAMES.hours);
/**
 * Floor a given ISO duration to the current day.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorDays('P1.1D') // => 'P1D'
 */

exports.floorHours = floorHours;
var floorDays = createFloorFnFor(_constants.UNIT_NAMES.days);
/**
 * Floor a given ISO duration to the current week.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorWeeks('P1.1W') // => 'P1W'
 */

exports.floorDays = floorDays;
var floorWeeks = createFloorFnFor(_constants.UNIT_NAMES.weeks);
/**
 * Floor a given ISO duration to the current month.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorMonths('P1.1M') // => 'P1M'
 */

exports.floorWeeks = floorWeeks;
var floorMonths = createFloorFnFor(_constants.UNIT_NAMES.months);
/**
 * Floor a given ISO duration to the current year.
 * @param isoDuration {string} - ISO8601 duration
 * @example
 * floorYears('P1.1Y') // => 'P1Y'
 */

exports.floorMonths = floorMonths;
var floorYears = createFloorFnFor(_constants.UNIT_NAMES.years);
exports.floorYears = floorYears;