https://calendar.longwood.edu/livewhale/scripts/lib/date/timezone.js

1/*globals livewhale: true */
2
3/*
4 * Dependency: livewhale.lib.DateFormatter
5 *
6 * Handles the conversion and output of a timestamp in a specified timezone
7 */
8
9if (typeof livewhale === 'undefined') {
10	window.livewhale = {};
11}
12if (!livewhale.lib) livewhale.lib = {};
13
14(function() {
15	var Timezone = function(timestamp, tz_offset) {
16		this._date = new Date((parseInt(timestamp, 10) * 1000) + (parseInt(tz_offset, 10) * 1000));
17		this._formatter = new livewhale.lib.DateFormatter(this);
18	};
19
20	// static methods and properties for gettting/setting time and date formats
21	Timezone.time_format = {
22		us:		null, // livewhale.time_format_us,
23		euro: null	// livewhale.time_format_euro
24	};
25	Timezone.date_format = {
26		us:		null, // livewhale.time_format_us,
27		euro: null	// livewhale.time_format_euro
28	};
29	Timezone.user_format_zone = 'us'; // default format zone
30	Timezone.setUserFormatZone = function(format_zone) {
31		Timezone.user_format_zone = format_zone;
32	};
33	Timezone.getUserFormatZone = function() {
34		return Timezone.user_format_zone;
35	};
36	Timezone.getUserTimeFormat = function() {
37		return (Timezone.time_format[Timezone.user_format_zone]) ? Timezone.time_format[Timezone.user_format_zone] : 'm/d/Y';
38	};
39	Timezone.getUserDateFormat = function() {
40		return (Timezone.date_format[Timezone.user_format_zone]) ? Timezone.date_format[Timezone.user_format_zone] : 'g:ia';
41	};
42	Timezone.prototype = {
43		month_names: [
44			"January", "February", "March",			"April",	 "May",			 "June",

45			"July",		 "August",	 "September", "October", "November", "December"
46		],
47		month_names_short: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
48		day_names: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
49		getFormattedDate: function(format) {
50			return this._formatter.format(format);
51		},
52		getDateObject: function() {
53			return this._date;
54		},
55		// uses user time format if no format zone param
56		getTimeString: function(format_zone) {
57			var format = (format_zone && Timezone.time_format[format_zone])
58				? Timezone.time_format[format_zone]
59				: Timezone.getUserTimeFormat();
60
61			return this._formatter.format(format);
62		},
63		// uses user date format if no format zone param
64		getShortDateString: function(format_zone) {
65			var format = (format_zone && Timezone.date_format[format_zone])
66				? Timezone.date_format[format_zone]
67				: Timezone.getUserDateFormat();
68
69			return this._formatter.format(format);
70		},
71		getDateTimeString: function() {
72			return this.month_names_short[ this._date.getUTCMonth() ] + ' '
73						 + this._date.getUTCDate() + ', '
74						 + this.getTimeString();
75		},
76		isDayStart: function() {
77			return (0 === this.getHours() && 0 === this.getMinutes());
78		},
79		// We use UTC because we've already made the
80		// offset adjustment for local time
81		getHours: function() {
82			return this._date.getUTCHours();
83		},
84		getMinutes: function() {
85			return this._date.getUTCMinutes();
86		},
87		getSeconds: function() {
88			return this._date.getUTCSeconds();
89		},
90		getMilliseconds: function() {
91			return this._date.getUTCMilliseconds();
92		},
93		getFullYear: function() {
94			return this._date.getUTCFullYear();
95		},
96		getMonth: function() {
97			return this._date.getUTCMonth();
98		},
99		getDate: function() {
100			return this._date.getUTCDate();
101		},
102		getDay: function() {
103			return this._date.getUTCDay();
104		},
105		getTime: function() {
106			return this._date.getTime();
107		},
108		setTimeToZero: function() {
109			this._date.setUTCHours(0);
110			this._date.setUTCMinutes(0);
111			this._date.setUTCSeconds(0);
112		}
113	};
114	livewhale.lib.DateTimezone = Timezone;
115}());