dmn-eval-js-es5/utils/helper/value.js

Evaluation of DMN 1.1 decision tables, limited to S-FEEL (Simple Friendly Enough Expression Language), es5 browser compatible

'use strict';

/*
*
*  ©2016-2017 EdgeVerve Systems Limited (a fully owned Infosys subsidiary),
*  Bangalore, India. All Rights Reserved.
*
*/

/*
Decision Model and Notation, v1.1
Page : 112 - 113
value and valueInverse functions for each of the time, date, date_and_time and duration types.
These functions are not exposed as a part of in-built function suite.
These are used for performing calculations and conversions.
*/

var moment = require('moment-timezone');

var _require = require('../built-in-functions'),
    time = _require.time,
    dateAndTime = _require['date and time'],
    duration = _require.duration;

var _require2 = require('./meta'),
    date_ISO_8601 = _require2.date_ISO_8601,
    time_ISO_8601 = _require2.time_ISO_8601,
    epoch = _require2.epoch;

var prepareTime = function prepareTime(value, offset) {
  var remainingTime = value;
  var hour = Math.floor(remainingTime / 3600);
  remainingTime = value % 3600;
  var minute = Math.floor(remainingTime / 60);
  remainingTime = value % 60;
  var second = remainingTime;

  return moment.parseZone('' + moment({ hour: hour, minute: minute, second: second }).format('THH:mm:ss') + offset, time_ISO_8601).format(time_ISO_8601);
};

var valueT = function valueT(obj) {
  var duration = moment.duration('PT' + obj.hour + 'H' + obj.minute + 'M' + obj.second + 'S');
  return duration.asSeconds();
};

var valueInverseT = function valueInverseT(value) {
  var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'Z';

  if (value >= 0 && value <= 86400) {
    return time(prepareTime(value, offset));
  }
  var secondsFromMidnight = value - Math.floor(value / 86400) * 86400;
  var timeStr = prepareTime(secondsFromMidnight, offset);
  return time('' + timeStr);
};

var valueDT = function valueDT(obj) {
  var e = moment.parseZone(epoch, date_ISO_8601);
  var duration = moment.duration(obj.diff(e));
  return duration.asSeconds();
};

var valueInverseDT = function valueInverseDT(value) {
  var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 'Z';

  var e = moment.parseZone(epoch, date_ISO_8601);
  return dateAndTime(e.add(value, 'seconds').utcOffset(offset).format());
};

var valueDTD = function valueDTD(obj) {
  return obj.asSeconds();
};

var valueInverseDTD = function valueInverseDTD(value) {
  return duration('PT' + Math.floor(value) + 'S');
};

var valueYMD = function valueYMD(obj) {
  return obj.asMonths();
};

var valueInverseYMD = function valueInverseYMD(value) {
  return duration('P' + Math.floor(value) + 'M');
};

module.exports = { valueT: valueT, valueInverseT: valueInverseT, valueDT: valueDT, valueInverseDT: valueInverseDT, valueDTD: valueDTD, valueInverseDTD: valueInverseDTD, valueYMD: valueYMD, valueInverseYMD: valueInverseYMD };