qewd-ripple/lib/dateTime.js

/*

 ----------------------------------------------------------------------------
 | qewd-ripple: QEWD-based Middle Tier for Ripple OSI                       |
 |                                                                          |
 | Copyright (c) 2016-17 Ripple Foundation Community Interest Company       |
 | All rights reserved.                                                     |
 |                                                                          |
 | http://rippleosi.org                                                     |
 | Email: code.custodian@rippleosi.org                                      |
 |                                                                          |
 | Author: Rob Tweed, M/Gateway Developments Ltd                            |
 |                                                                          |
 | Licensed under the Apache License, Version 2.0 (the "License");          |
 | you may not use this file except in compliance with the License.         |
 | You may obtain a copy of the License at                                  |
 |                                                                          |
 |     http://www.apache.org/licenses/LICENSE-2.0                           |
 |                                                                          |
 | Unless required by applicable law or agreed to in writing, software      |
 | distributed under the License is distributed on an "AS IS" BASIS,        |
 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
 | See the License for the specific language governing permissions and      |
 |  limitations under the License.                                          |
 ----------------------------------------------------------------------------

  26 January 2017

*/

var moment = require('moment-timezone');
var timezone = 'Europe/London';


function format(date) {
  if (typeof date !== 'object') date = new Date(date);
  return moment(date).tz(timezone).format();
}

function now() {
  return format(new Date());
}

function isDST(date) {
  if (typeof date !== 'object') date = new Date(date);
  return moment(date).tz(timezone).isDST();
}

function toSqlPASFormat(date) {
  if (typeof date !== 'object') date = new Date(date);
  return moment(date).tz(timezone).format("YYYY-MM-DD");
}

function toGMT(date) {
  // if a date is in summer time, return as GMT, ie with an hour deducted
  var result = date;
  if (moment(date).tz(timezone).isDST()) result = new Date(date.getTime() - 3600000);
  return result;
}

function getRippleTime(date, host) {
  //console.log('*** host = ' + host);
  if (date === '') return date;
  var dt = new Date(date);
  if (host === 'ethercis') dt = toGMT(dt);
  return dt.getTime();
}

function msSinceMidnight(date, host, GMTCheck) {
  var e = new Date(date);
  //if (host === 'ethercis') e = toGMT(e);
  if (GMTCheck) e = toGMT(e);
  return e.getTime() - e.setHours(0,0,0,0);
}

function msAtMidnight(date, host, GMTCheck) {
  var e = new Date(date);
  //if (host === 'ethercis') e = toGMT(e);
  if (GMTCheck) e = toGMT(e);
  return e.setHours(0,0,0,0);
}

module.exports = {
  format: format,
  now: now,
  isDST: isDST,
  toGMT: toGMT,
  msSinceMidnight: msSinceMidnight,
  msAtMidnight: msAtMidnight,
  getRippleTime: getRippleTime,
  toSqlPASFormat: toSqlPASFormat
};