Created
August 19, 2013 22:09
-
-
Save theladyjaye/6274766 to your computer and use it in GitHub Desktop.
datetime module for ISO8601 UTC Dates
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
define([ | |
], function(){ | |
var months = ['January', 'February', 'March', 'April', 'May', | |
'June', 'July', 'August', 'September', 'October', | |
'November', 'December']; | |
// All values assumed to be ISO 8601 and in UTC | |
// 2013-08-29T14:29Z | |
// 2013-08-29T14:29.000Z | |
// 2013-08-29T14:29+0000 | |
// 2013-08-29T14:29:30.123+0000 | |
var isoRegex = /(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})(?:\:(\d{2})(?:\.(\d+))?)?(?:Z|\+0000)?/; | |
function UTCStringToMilliseconds(value){ | |
// 2013-08-29T15:02:00Z | |
// milliseconds and seconds are optional | |
// if omitted, 0's are assumed. | |
var c = isoRegex.exec(value); | |
var year, month, day, hours, minutes, seconds, millisecond = 0; | |
year = c[1]; | |
month = (c[2] - 1); | |
day = c[3]; | |
hour = c[4]; | |
minute = c[5]; | |
second = c[6] || 0; | |
millisecond = c[7] || 0; | |
return Date.UTC(year, month, day, hour, minute, second, millisecond); | |
} | |
function UTCStringToSeconds(value){ | |
var utcMilliSeconds = UTCStringToMilliseconds(value); | |
return parseInt((utcMilliSeconds / 1000), 10); | |
} | |
function UTCStringToLocalDate(value){ | |
var utcSeconds = UTCStringToSeconds(value); | |
var date = new Date(0); | |
date.setUTCSeconds(utcSeconds); | |
return date; | |
} | |
function monthDayYearStringForDate(date){ | |
var dayValue = date.getDate(); | |
var suffix = daySuffix(day); | |
var day = dayValue.toString() + suffix; | |
return months[date.getMonth()] + ' ' + day + ' ' + date.getFullYear(); | |
} | |
function monthDayYearStringForUTCString(value){ | |
var date = UTCStringToLocalDate(value); | |
return monthDayYearStringForDate(date); | |
} | |
function daySuffix(day){ | |
switch (day) | |
{ | |
case 1: | |
case 21: | |
case 31: | |
return 'st'; | |
case 2: | |
case 22: | |
return 'nd'; | |
case 3: | |
case 23: | |
return 'rd'; | |
default: | |
return 'th'; | |
} | |
} | |
function relativeDate(value){ | |
// compatibility | |
var now = +new Date(); | |
var date = UTCStringToMilliseconds(value); | |
var totalSeconds = parseInt((now - date) / 1000, 10); | |
var time = ''; | |
if (totalSeconds < 10) { | |
return 'just now'; | |
} else if(totalSeconds < 60) { | |
time = totalSeconds; | |
return time + ' seconds ago'; | |
} else if(totalSeconds < 120) { | |
return 'about a minute ago'; | |
} else if(totalSeconds < 3600) { | |
time = parseInt(totalSeconds / 60, 10); | |
return time + ' minutes ago'; | |
} else if(totalSeconds < 7200) { | |
return 'about an hour ago'; | |
} else if(totalSeconds < 86400) { | |
time = parseInt(totalSeconds / 3600, 10); | |
return time + ' hours ago'; | |
} else if(totalSeconds < 172800) { | |
return '1 day ago'; | |
} else if(totalSeconds < 604800) { | |
time = parseInt(totalSeconds / 86400, 10); | |
return time + ' days ago'; | |
} else if(totalSeconds < 1209600) { | |
return '1 week ago'; | |
} else { | |
time = parseInt(totalSeconds / 604800, 10); | |
return time + ' weeks ago'; | |
} | |
} | |
return { | |
relativeDate: relativeDate, | |
UTCStringToMilliseconds: UTCStringToMilliseconds, | |
UTCStringToSeconds: UTCStringToSeconds, | |
UTCStringToLocalDate: UTCStringToLocalDate, | |
monthDayYearStringForDate: monthDayYearStringForDate, | |
monthDayYearStringForUTCString:monthDayYearStringForUTCString | |
}; | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Parses ISO 8601 UTC Dates to JS Local Time Dates. Includes some relative date formatting as some simple date formatting. Should handle the following formats:
2013-08-29T14:29Z
2013-08-29T14:29:00Z
2013-08-29T14:29:00.000Z
2013-08-29T14:29+0000
2013-08-29T14:29:00+0000
2013-08-29T14:29:00.000+0000
If seconds or milliseconds are not present, 0 is assumed.