100 lines
2.7 KiB
JavaScript
100 lines
2.7 KiB
JavaScript
"use strict";
|
||
|
||
Object.defineProperty(exports, "__esModule", {
|
||
value: true
|
||
});
|
||
exports.default = tzTokenizeDate;
|
||
|
||
/**
|
||
* Returns the [year, month, day, hour, minute, seconds] tokens of the provided
|
||
* `date` as it will be rendered in the `timeZone`.
|
||
*/
|
||
function tzTokenizeDate(date, timeZone) {
|
||
var dtf = getDateTimeFormat(timeZone);
|
||
return dtf.formatToParts ? partsOffset(dtf, date) : hackyOffset(dtf, date);
|
||
}
|
||
|
||
var typeToPos = {
|
||
year: 0,
|
||
month: 1,
|
||
day: 2,
|
||
hour: 3,
|
||
minute: 4,
|
||
second: 5
|
||
};
|
||
|
||
function partsOffset(dtf, date) {
|
||
try {
|
||
var formatted = dtf.formatToParts(date);
|
||
var filled = [];
|
||
|
||
for (var i = 0; i < formatted.length; i++) {
|
||
var pos = typeToPos[formatted[i].type];
|
||
|
||
if (pos >= 0) {
|
||
filled[pos] = parseInt(formatted[i].value, 10);
|
||
}
|
||
}
|
||
|
||
return filled;
|
||
} catch (error) {
|
||
if (error instanceof RangeError) {
|
||
return [NaN];
|
||
}
|
||
|
||
throw error;
|
||
}
|
||
}
|
||
|
||
function hackyOffset(dtf, date) {
|
||
var formatted = dtf.format(date).replace(/\u200E/g, '');
|
||
var parsed = /(\d+)\/(\d+)\/(\d+),? (\d+):(\d+):(\d+)/.exec(formatted); // var [, fMonth, fDay, fYear, fHour, fMinute, fSecond] = parsed
|
||
// return [fYear, fMonth, fDay, fHour, fMinute, fSecond]
|
||
|
||
return [parsed[3], parsed[1], parsed[2], parsed[4], parsed[5], parsed[6]];
|
||
} // Get a cached Intl.DateTimeFormat instance for the IANA `timeZone`. This can be used
|
||
// to get deterministic local date/time output according to the `en-US` locale which
|
||
// can be used to extract local time parts as necessary.
|
||
|
||
|
||
var dtfCache = {};
|
||
|
||
function getDateTimeFormat(timeZone) {
|
||
if (!dtfCache[timeZone]) {
|
||
// New browsers use `hourCycle`, IE and Chrome <73 does not support it and uses `hour12`
|
||
var testDateFormatted = new Intl.DateTimeFormat('en-US', {
|
||
hour12: false,
|
||
timeZone: 'America/New_York',
|
||
year: 'numeric',
|
||
month: 'numeric',
|
||
day: '2-digit',
|
||
hour: '2-digit',
|
||
minute: '2-digit',
|
||
second: '2-digit'
|
||
}).format(new Date('2014-06-25T04:00:00.123Z'));
|
||
var hourCycleSupported = testDateFormatted === '06/25/2014, 00:00:00' || testDateFormatted === '06/25/2014 00:00:00';
|
||
dtfCache[timeZone] = hourCycleSupported ? new Intl.DateTimeFormat('en-US', {
|
||
hour12: false,
|
||
timeZone: timeZone,
|
||
year: 'numeric',
|
||
month: 'numeric',
|
||
day: '2-digit',
|
||
hour: '2-digit',
|
||
minute: '2-digit',
|
||
second: '2-digit'
|
||
}) : new Intl.DateTimeFormat('en-US', {
|
||
hourCycle: 'h23',
|
||
timeZone: timeZone,
|
||
year: 'numeric',
|
||
month: 'numeric',
|
||
day: '2-digit',
|
||
hour: '2-digit',
|
||
minute: '2-digit',
|
||
second: '2-digit'
|
||
});
|
||
}
|
||
|
||
return dtfCache[timeZone];
|
||
}
|
||
|
||
module.exports = exports.default; |