59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
"use strict";
|
|
|
|
|
|
|
|
// P R O G R A M
|
|
|
|
const relativeDate = (undefined => {
|
|
const SECOND = 1000;
|
|
const MINUTE = 60 * SECOND;
|
|
const HOUR = 60 * MINUTE;
|
|
const DAY = 24 * HOUR;
|
|
const WEEK = 7 * DAY;
|
|
const YEAR = DAY * 365;
|
|
const MONTH = YEAR / 12;
|
|
|
|
const formats = [
|
|
[ 0.7 * MINUTE, "just now" ],
|
|
[ 1.5 * MINUTE, "a minute ago" ],
|
|
[ 60 * MINUTE, "minutes ago", MINUTE ],
|
|
[ 1.5 * HOUR, "an hour ago" ],
|
|
[ DAY, "hours ago", HOUR ],
|
|
[ 2 * DAY, "yesterday" ],
|
|
[ 7 * DAY, "days ago", DAY ],
|
|
[ 1.5 * WEEK, "a week ago" ],
|
|
[ MONTH, "weeks ago", WEEK ],
|
|
[ 1.5 * MONTH, "a month ago" ],
|
|
[ YEAR, "months ago", MONTH ],
|
|
[ 1.5 * YEAR, "a year ago" ],
|
|
[ Number.MAX_VALUE, "years ago", YEAR ]
|
|
];
|
|
|
|
function relativeDate(input, reference) {
|
|
!reference && (reference = (new Date).getTime());
|
|
reference instanceof Date && (reference = reference.getTime());
|
|
input instanceof Date && (input = input.getTime());
|
|
|
|
const delta = reference - input;
|
|
const len = formats.length;
|
|
|
|
for (let i = -1; ++i < len;) {
|
|
const format = formats[i];
|
|
|
|
if (delta < format[0]) {
|
|
return format[2] === undefined ? format[1] : Math.round(delta / format[2]) + " " + format[1];
|
|
}
|
|
}
|
|
}
|
|
|
|
return relativeDate;
|
|
})();
|
|
|
|
|
|
|
|
// E X P O R T
|
|
|
|
if (typeof module !== "undefined" && module.exports) {
|
|
module.exports = exports = relativeDate;
|
|
}
|