dmn-eval-js-es5/utils/built-in-functions/date-time-functions/date.js

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

'use strict';

var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };

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

/*
Decision Model and Notation, v1.1
Page : 131
*/

/*
Format : date(from) // from - date string
Description : convert "from" to a date
e.g. : date("2012-12-25") – date("2012-12-24") = duration("P1D")
*/

/*
Format : date and time(from) // from - date_and_time
Description : convert "from" to a date (set time components to null)
e.g. : date(date and time("2012-12-25T11:00:00Z")) = date("2012-12-25")
*/

/*
Format : date(year, month, day) // year, month, day are numbers
Description : creates a date from year, month, day component values
e.g. : date(2012, 12, 25) = date("2012-12-25")
*/

var moment = require('moment-timezone');
var addProperties = require('./add-properties');

var _require = require('../../helper/meta'),
    types = _require.types,
    properties = _require.properties,
    UTC = _require.UTC,
    UTCTimePart = _require.UTCTimePart,
    time_ISO_8601 = _require.time_ISO_8601,
    date_ISO_8601 = _require.date_ISO_8601;

var year = properties.year,
    month = properties.month,
    day = properties.day;

var props = Object.assign({}, { year: year, month: month, day: day, type: types.date, isDate: true });

var isNumber = function isNumber(args) {
  return args.reduce(function (prev, next) {
    return prev && typeof next === 'number';
  }, true);
};

var parseDate = function parseDate(str) {
  try {
    var d = moment.parseZone('' + str + UTCTimePart);
    if (d.isValid()) {
      return d;
    }
    throw new Error('Invalid date. This is usually caused by an inappropriate format. Please check the input format.');
  } catch (err) {
    return err;
  }
};

var date = function date() {
  for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
    args[_key] = arguments[_key];
  }

  var d = void 0;
  var result = void 0;
  if (args.length === 1) {
    var arg = args[0];
    if (arg !== null && arg !== undefined) {
      if (typeof arg === 'string') {
        try {
          d = arg === '' ? moment.parseZone(UTCTimePart, time_ISO_8601) : parseDate(arg);
        } catch (err) {
          throw err;
        }
      } else if ((typeof arg === 'undefined' ? 'undefined' : _typeof(arg)) === 'object') {
        if (arg instanceof Date) {
          var ISO = arg.toISOString();
          var dateTime = moment.parseZone(ISO);
          var datePart = dateTime.format(date_ISO_8601);
          d = moment.parseZone('' + datePart + UTCTimePart);
        } else if (arg.isDateTime || moment.isMoment(arg)) {
          var _dateTime = moment.tz(arg.format(), UTC);
          var _datePart = _dateTime.format(date_ISO_8601);
          d = moment.parseZone('' + _datePart + UTCTimePart);
        }
        if (!d || !d.isValid()) {
          throw new Error('Invalid date. Parsing error while attempting to create date from ' + arg);
        }
      } else {
        throw new Error('Invalid format encountered. Please specify date in one of these formats :\n- "date("2012-12-25")"\n- date_and_time object');
      }
    }
  } else if (args.length === 3 && isNumber(args)) {
    var _year = args[0],
        _month = args[1],
        _day = args[2];

    d = moment.tz({ year: _year, month: _month, day: _day, hour: 0, minute: 0, second: 0 }, UTC);
    if (!d.isValid()) {
      throw new Error('Invalid date. Parsing error while attempting to create date from parts');
    }
  } else {
    throw new Error('Invalid number of arguments specified with "date" in-built function');
  }

  if (d !== undefined) {
    result = addProperties(d, props);
  }
  return result;
};

module.exports = { date: date };