bugcore
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bugcore is a JavaScript library that provides a foundational architecture for object oriented JS
236 lines (200 loc) • 7.22 kB
JavaScript
/*
* Copyright (c) 2016 airbug Inc. http://airbug.com
*
* bugcore may be freely distributed under the MIT license.
*/
//-------------------------------------------------------------------------------
// Annotations
//-------------------------------------------------------------------------------
//@Export('DateUtil')
//@Require('Class')
//@Require('Obj')
//@Require('StringUtil')
//-------------------------------------------------------------------------------
// Context
//-------------------------------------------------------------------------------
require('bugpack').context("*", function(bugpack) {
//-------------------------------------------------------------------------------
// BugPack
//-------------------------------------------------------------------------------
var Class = bugpack.require('Class');
var Obj = bugpack.require('Obj');
var StringUtil = bugpack.require('StringUtil');
//-------------------------------------------------------------------------------
// Declare Class
//-------------------------------------------------------------------------------
/**
* @class
* @extends {Obj}
*/
var DateUtil = Class.extend(Obj, {
_name: "DateUtil"
});
//-------------------------------------------------------------------------------
// Static Properties
//-------------------------------------------------------------------------------
/**
* @static
* @enum {String}
*/
DateUtil.monthNames = [
"January",
"February",
"March",
"April",
"May",
"June",
"July",
"August",
"September",
"October",
"November",
"December"
];
/**
* @static
* @enum {String}
*/
DateUtil.monthShortNames = [
"Jan",
"Feb",
"Mar",
"Apr",
"May",
"Jun",
"Jul",
"Aug",
"Sep",
"Oct",
"Nov",
"Dec"
];
//-------------------------------------------------------------------------------
// Static Methods
//-------------------------------------------------------------------------------
/**
* @static
* @param {Date} date
* @return {string}
*/
DateUtil.getAMPM = function(date) {
if (date.getHours() < 12) {
return "AM";
}
return "PM";
};
/**
* @static
* @param {Date} date
* @return {string}
*/
DateUtil.getHour12HourClock = function(date) {
var hours = date.getHours();
if (hours === 0) {
return 12;
} else if (hours <= 12) {
return hours;
}
return (hours - 12);
};
/**
* @static
* @param {Date} date
* @return {string}
*/
DateUtil.getMonthName = function(date) {
return DateUtil.monthNames[date.getMonth()];
};
/**
* @static
* @param {Date} date
* @return {string}
*/
DateUtil.getMonthShortName = function(date) {
return DateUtil.monthShortNames[date.getMonth()];
};
/**
* @static
* @param {Date} fromDate
* @param {Date} toDate
* @return {number}
*/
DateUtil.getNumberMinutesAgo = function(fromDate, toDate) {
var fromUTC = fromDate.getTime();
var toUTC = toDate.getTime();
var numberMinutesAgo = Math.floor((toUTC - fromUTC) / (1000 * 60));
return numberMinutesAgo;
};
/**
* @static
* @param {Date} timestampDate
* @return {string}
*/
DateUtil.renderSentAgo = function(timestampDate) {
var nowDate = new Date();
var nowUTC = nowDate.getTime();
var yesterdayDate = new Date(nowUTC - (1000 * 60 * 60 * 24));
var timestampUTC = timestampDate.getTime()
var howLongAgo = "";
// Did this message occur within the last minute?
if (nowUTC < timestampUTC + (1000 * 60)) {
howLongAgo += "a few seconds ago";
}
// Did this message occur within the last hour?
else if (nowUTC < timestampUTC + (1000 * 60 * 60)) {
var numberOfMinutesAgo = DateUtil.getNumberMinutesAgo(timestampDate, nowDate);
howLongAgo += numberOfMinutesAgo + " minutes ago";
}
// Did this message occur on the same year?
else if (nowDate.getFullYear() === timestampDate.getFullYear()) {
// Did this message occur on the same day and month?
if (nowDate.getDate() === timestampDate.getDate() && nowDate.getMonth() === timestampDate.getMonth()) {
howLongAgo += DateUtil.getHour12HourClock(timestampDate) + ":" +
StringUtil.lpad(timestampDate.getMinutes(), "0", 2) + " " + DateUtil.getAMPM(timestampDate);
}
// Did this message occur yesterday?
else if (yesterdayDate.getDate() === timestampDate.getDate() && yesterdayDate.getMonth() === timestampDate.getMonth()) {
howLongAgo += "yesterday " + DateUtil.getHour12HourClock(timestampDate) + ":" +
StringUtil.lpad(timestampDate.getMinutes(), "0", 2) + " " + DateUtil.getAMPM(timestampDate);
}
else {
howLongAgo += DateUtil.getMonthName(timestampDate) + " " + timestampDate.getDate() + ", " +
DateUtil.getHour12HourClock(timestampDate) + ":" + StringUtil.lpad(timestampDate.getMinutes(), "0", 2) + " " +
DateUtil.getAMPM(timestampDate);
}
}
// Fallback to a full timestamp
else {
howLongAgo += DateUtil.getMonthName(timestampDate) + " " + timestampDate.getDate() + ", " +
timestampDate.getFullYear() + " " + DateUtil.getHour12HourClock(timestampDate) + ":" +
StringUtil.lpad(timestampDate.getMinutes(), "0", 2) + " " + DateUtil.getAMPM(timestampDate);
}
return howLongAgo;
};
/**
* @static
* @param {Date} timestampDate
* @return {string}
*/
DateUtil.renderShortTime = function(timestampDate) {
var nowDate = new Date();
var stamp = "";
//same year?
if (nowDate.getFullYear() === timestampDate.getFullYear()) {
//same day?
if (nowDate.getDate() === timestampDate.getDate() && nowDate.getMonth() === timestampDate.getMonth()) {
stamp += DateUtil.getHour12HourClock(timestampDate) + ":" +
StringUtil.lpad(timestampDate.getMinutes(), "0", 2) + " " + DateUtil.getAMPM(timestampDate);
} else {
stamp += DateUtil.getMonthShortName(timestampDate) + " " + timestampDate.getDate();
}
} else {
stamp += timestampDate.getMonth() + "/" + timestampDate.getDate() + "/" + timestampDate.getFullYear();
}
return stamp;
};
//-------------------------------------------------------------------------------
// Exports
//-------------------------------------------------------------------------------
bugpack.export('DateUtil', DateUtil);
});