traffic_portal/app/src/common/service/utils/DateUtils.js

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

var DateUtils = function() {

	this.dateFormat = function () {
		// source: http://blog.stevenlevithan.com/archives/date-time-format
		var	token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
			timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
			timezoneClip = /[^-+\dA-Z]/g,
			pad = function (val, len) {
				val = String(val);
				len = len || 2;
				while (val.length < len) val = "0" + val;
				return val;
			};

		// Regexes and supporting functions are cached through closure
		return function (date, mask, utc) {
			if (!date) return '';

			var dF = this.dateFormat;

			// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
			if (arguments.length === 1 && Object.prototype.toString.call(date) === "[object String]" && !/\d/.test(date)) {
				mask = date;
				date = undefined;
			}

			// Passing date through Date applies Date.parse, if necessary
			date = date ? new Date(date) : new Date;
			if (isNaN(date)) throw SyntaxError("invalid date");

			mask = String(dF.masks[mask] || mask || dF.masks["default"]);

			// Allow setting the utc argument via the mask
			if (mask.slice(0, 4) === "UTC:") {
				mask = mask.slice(4);
				utc = true;
			}

			var	_ = utc ? "getUTC" : "get",
				d = date[_ + "Date"](),
				D = date[_ + "Day"](),
				m = date[_ + "Month"](),
				y = date[_ + "FullYear"](),
				H = date[_ + "Hours"](),
				M = date[_ + "Minutes"](),
				s = date[_ + "Seconds"](),
				L = date[_ + "Milliseconds"](),
				o = utc ? 0 : date.getTimezoneOffset(),
				flags = {
					d:    d,
					dd:   pad(d),
					ddd:  dF.i18n.dayNames[D],
					dddd: dF.i18n.dayNames[D + 7],
					m:    m + 1,
					mm:   pad(m + 1),
					mmm:  dF.i18n.monthNames[m],
					mmmm: dF.i18n.monthNames[m + 12],
					yy:   String(y).slice(2),
					yyyy: y,
					h:    H % 12 || 12,
					hh:   pad(H % 12 || 12),
					H:    H,
					HH:   pad(H),
					M:    M,
					MM:   pad(M),
					s:    s,
					ss:   pad(s),
					l:    pad(L, 3),
					L:    pad(L > 99 ? Math.round(L / 10) : L),
					t:    H < 12 ? "a"  : "p",
					tt:   H < 12 ? "am" : "pm",
					T:    H < 12 ? "A"  : "P",
					TT:   H < 12 ? "AM" : "PM",
					Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
					o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
					S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 !== 10) * d % 10]
				};

			return mask.replace(token, function ($0) {
				return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
			});
		};
	}();

	this.dateFormat.masks = {
		"default":      "ddd mmm dd yyyy HH:MM:ss",
		shortDate:      "m/d/yy",
		mediumDate:     "mmm d, yyyy",
		longDate:       "mmmm d, yyyy",
		fullDate:       "dddd, mmmm d, yyyy",
		shortTime:      "h:MM TT",
		mediumTime:     "h:MM:ss TT",
		longTime:       "h:MM:ss TT Z",
		isoDate:        "yyyy-mm-dd",
		isoTime:        "HH:MM:ss",
		isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",
		isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
	};

	this.dateFormat.i18n = {
		dayNames: [
			"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
			"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
		],
		monthNames: [
			"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
			"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
		]
	};

	/**
	 * Converts a date into a string that tells how much time is between the current time and the given date.
	 *
	 * @example
	 * // returns "1 hour ago"
	 * getRelativeTime(new Date(Date.now() - 60*60*1000)) ;
	 *
	 * // returns "1 hour from now"
	 * getRelativeTime(new Date(Date.now() + 60*60*1000)) ;
	 *
	 * @param {Date | string} date Either a Date object or a string that can be parsed by momentjs.
	 * @returns {string} A human readable description of how much time is between now and `date`.
	 */
	this.getRelativeTime = function(date) {
		return moment(date).fromNow();
	};

	/**
	 * Converts a date into a string that tells how much time is between the current time and the given date and whether
	 * the user has logged into the system.
	 * @param {Date | string} date Either a Date object or a string that can be parsed by momentjs.
	 * @returns {string} A human readable description of how much time is between now and `date`.
	 */
	this.relativeLoginTime = function(date) {
		if (date) {
			return moment(date).fromNow();
		} else {
			return "Never logged in";
		}
	};

};

DateUtils.$inject = [];
module.exports = DateUtils;