Files
Smith a5f3794527 include prod deps in vcs with some exceptions
* cloudno.de has problems installing new dependencies lately..
2022-06-30 22:59:51 +02:00

78 lines
2.1 KiB
JavaScript

var dateFormatter = exports
// Source: http://webcloud.se/log/JavaScript-and-ISO-8601/
var iso8601 = new RegExp(
'([0-9]{4})([-]?([0-9]{2})([-]?([0-9]{2})'
+ '(T([0-9]{2}):([0-9]{2})(:([0-9]{2})(\.([0-9]+))?)?'
+ '(Z|(([-+])([0-9]{2}):([0-9]{2})))?)?)?)?'
)
/*
* Converts a date time stamp following the ISO8601 format to a JavaScript Date
* object.
*
* @param {String} time - String representation of timestamp.
* @return {Date} - Date object from timestamp.
*/
dateFormatter.decodeIso8601 = function(time) {
var dateParts = time.toString().match(iso8601)
if (!dateParts) {
throw new Error('Expected a ISO8601 datetime but got \'' + time + '\'')
}
var date = [
[dateParts[1], dateParts[3] || '01', dateParts[5] || '01'].join('-')
, 'T'
, [dateParts[7] || '00', dateParts[8] || '00', dateParts[10] || '00'].join(':')
, '.'
, dateParts[12] || '000'
, dateParts[13] || dateFormatter.formatCurrentOffset()
].join('')
return new Date(date)
}
/**
* Converts a JavaScript Date object to an ISO8601 timestamp.
*
* @param {Date} date - Date object.
* @return {String} - String representation of timestamp.
*/
dateFormatter.encodeIso8601 = function(date) {
return date.toISOString().replace(/\.\d{3}Z/, 'Z')
}
/**
* Helper function to pad the digits with 0s to meet date formatting
* requirements.
*
* @param {Number} digit - The number to pad.
* @param {Number} length - Length of digit string, prefix with 0s if not
* already length.
* @return {String} - String with the padded digit
*/
function zeroPad(digit, length) {
var padded = '' + digit
while (padded.length < length) {
padded = '0' + padded
}
return padded
}
/**
* Helper function to get the current timezone to default decoding to
* rather than UTC. (for backward compatibility)
*
* @return {String} - in the format /Z|[+-]\d{2}:\d{2}/
*/
dateFormatter.formatCurrentOffset = function () {
var offset = new Date().getTimezoneOffset()
return (offset === 0) ? 'Z' : [
(offset < 0) ? '+' : '-'
, zeroPad(Math.abs(Math.floor(offset/60)),2)
, ':'
, zeroPad(Math.abs(offset%60),2)
].join('')
}