Refactor folder structure

src/utils/ago.ts

@@ -0,0 +1,43 @@
+/**
+ * Human readable elapsed or remaining time (example: 3 minutes)
+ * modified from https://stackoverflow.com/a/67338038/938822
+ */
+
+const rft = new Intl.RelativeTimeFormat(
+	typeof navigator !== 'undefined' ? [...navigator.languages] : ['en'],
+	{ numeric: 'auto' }
+)
+
+export function ago(
+	/** A Date object, timestamp or string parsable with Date.parse() */
+	date: string | number | Date,
+	/** A Date object, timestamp or string parsable with Date.parse() */
+	nowDate: string | number | Date = Date.now()
+): string {
+	const SECOND = 1000
+	const MINUTE = 60 * SECOND
+	const HOUR = 60 * MINUTE
+	const DAY = 24 * HOUR
+	const WEEK = 7 * DAY
+	const MONTH = 30 * DAY
+	const YEAR = 365 * DAY
+	const intervals = [
+		{ ge: YEAR, divisor: YEAR, unit: 'year' },
+		{ ge: MONTH, divisor: MONTH, unit: 'month' },
+		{ ge: WEEK, divisor: WEEK, unit: 'week' },
+		{ ge: DAY, divisor: DAY, unit: 'day' },
+		{ ge: HOUR, divisor: HOUR, unit: 'hour' },
+		{ ge: MINUTE, divisor: MINUTE, unit: 'minute' },
+		{ ge: 0, divisor: SECOND, unit: 'seconds' },
+	]
+	const now = typeof nowDate === 'object' ? nowDate.getTime() : new Date(nowDate).getTime()
+	const diff = now - (typeof date === 'object' ? date : new Date(date)).getTime()
+	const diffAbs = Math.abs(diff)
+	for (const interval of intervals) {
+		if (diffAbs >= interval.ge) {
+			const x = Math.round(Math.abs(diff) / interval.divisor)
+			const isFuture = diff < 0
+			return rft.format(isFuture ? x : -x, interval.unit as Intl.RelativeTimeFormatUnit)
+		}
+	}
+}