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/* LUT for date-number from month name. */
const MonthNumber = {
"January": 1, "Feb": 2, "March": 3, "April": 4, "May": 5, "June": 6, "July": 7, "August": 8, "September": 9, "October": 10, "November": 11, "December": 12
}
/**
* Padds a string (or number) with leading zeroes.
* @param {string} number The string to be padded.
* @param {number} [2] n The minimum width of the returned string.
* @return {string} Zero-padded string.
*/
function zpad(number, n=2) {
let ret = number.toString();
while (n - ret.length > 0) {
ret = "0" + ret;
}
return ret
}
/**
* Attempts to recognize date-string pattern and convert into ISO861.
* @param {string} dateStr A String representing the time, UTC will be assumed
* unless it is valid ISO861 with a different timezone.
* @return {string} dateStr as ISO861. If no pattern was found (or it
* already is valid ISO861. The string will be returned
* with no changes.
*/
function toISO861UTC(dateStr) {
// yyyy-mm-ddThh:mm:ssZ
if (/^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z$/.test(dateStr)) {
//console.log(`yyyy-mm-ddThh:mm:ssZ <- ${dateStr}`);
return dateStr;
}
// yyyy MMMM dd
if (/^\d{4}\s[a-z,A-Z]+\s\d{2}$/.test(dateStr)) {
//console.log(`yyyy MMM dd <- ${dateStr}`);
let parts = dateStr.split(" ");
dateStr = (`${parts[0]}-${zpad(MonthNumber[parts[1]])}-${parts[2]}T00:00:00Z`);
return dateStr;
}
// yyyy mm dd hh:mm:ss
if (/^\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}/.test(dateStr)) {
return dateStr.replace(" ", "T") + "Z";
}
// yyyy mm dd hh:mm:ss.msm
if (/^\d{4}-\d{2}-\d{2}\s\d{2}:\d{2}:\d{2}.\d{4}/.test(dateStr)) {
return dateStr.replace(" ", "T").split(".")[0] + "Z";
}
console.warn(dateStr);
return dateStr;
}
/**
* Returns a date object from a date-string.
* @param {string} dateStr A String representing the time, UTC will be assumed
* unless it is valid ISO861 with a different timezone.
* @return {Date} The date object representing the date-string.
*/
export function parseDateAsUTC(dateStr) {
dateStr = toISO861UTC(dateStr);
return new Date(dateStr);
}
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