44 lines
1.5 KiB
JavaScript
44 lines
1.5 KiB
JavaScript
'use strict';
|
|
|
|
function formatRelativeTime(timeString) {
|
|
if (!timeString) {
|
|
return 'never';
|
|
}
|
|
|
|
const then = Date.parse(timeString);
|
|
const now = Date.now();
|
|
const difference = Math.abs(now - then) / 1000.0;
|
|
const future = now < then;
|
|
|
|
const descriptions = [
|
|
[60, 'a few seconds', null],
|
|
[60 * 2, 'a minute', null],
|
|
[60 * 60, '% minutes', 60],
|
|
[60 * 60 * 2, 'an hour', null],
|
|
[60 * 60 * 24, '% hours', 60 * 60],
|
|
[60 * 60 * 24 * 2, 'a day', null],
|
|
[60 * 60 * 24 * 30.42, '% days', 60 * 60 * 24],
|
|
[60 * 60 * 24 * 30.42 * 2, 'a month', null],
|
|
[60 * 60 * 24 * 30.42 * 12, '% months', 60 * 60 * 24 * 30.42],
|
|
[60 * 60 * 24 * 30.42 * 12 * 2, 'a year', null],
|
|
[8640000000000000 /*max*/, '% years', 60 * 60 * 24 * 30.42 * 12],
|
|
];
|
|
|
|
let text = null;
|
|
for (let kv of descriptions) {
|
|
const multiplier = kv[0];
|
|
const template = kv[1];
|
|
const divider = kv[2];
|
|
if (difference < multiplier) {
|
|
text = template.replace(/%/, Math.round(difference / divider));
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (text === 'a day') {
|
|
return future ? 'tomorrow' : 'yesterday';
|
|
}
|
|
return future ? 'in ' + text : text + ' ago';
|
|
}
|
|
|
|
module.exports = {formatRelativeTime: formatRelativeTime};
|