79 lines
1.9 KiB
TypeScript
79 lines
1.9 KiB
TypeScript
import type { Locale } from "date-fns";
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import { format } from "date-fns";
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function localeMonthNames(): string[] {
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const monthNames: string[] = [];
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for (let i = 0; i < 12; i += 1) {
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const d = new Date(2019, i, 1);
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const month = d.toLocaleString("default", { month: "long" });
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monthNames.push(month);
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}
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return monthNames;
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}
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function localeShortWeekDayNames(): string[] {
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const weekDayNames: string[] = [];
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for (let i = 13; i < 20; i += 1) {
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const d = new Date(2019, 9, i);
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const weekDay = d.toLocaleString("default", { weekday: "short" });
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weekDayNames.push(weekDay);
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}
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return weekDayNames;
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}
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// https://stackoverflow.com/a/18650828/10204399
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function formatBytes(
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bytes: number,
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decimals = 2,
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locale: string | undefined = undefined
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): string {
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const formatNumber = (value = 0, unit = "byte") =>
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new Intl.NumberFormat(locale, {
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style: "unit",
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unit,
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unitDisplay: "long",
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}).format(value);
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if (bytes === 0) return formatNumber(0);
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if (bytes < 0 || bytes > Number.MAX_SAFE_INTEGER) {
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throw new RangeError(
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"Number mustn't be negative and be inferior to Number.MAX_SAFE_INTEGER"
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);
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}
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const k = 1024;
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const dm = decimals < 0 ? 0 : decimals;
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const sizes = [
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"byte",
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"kilobyte",
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"megabyte",
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"gigabyte",
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"terabyte",
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"petabyte",
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];
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const i = Math.floor(Math.log(bytes) / Math.log(k));
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return formatNumber(parseFloat((bytes / k ** i).toFixed(dm)), sizes[i]);
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}
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function roundToNearestMinute(date = new Date()) {
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const minutes = 1;
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const ms = 1000 * 60 * minutes;
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// 👇️ replace Math.round with Math.ceil to always round UP
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return new Date(Math.round(date.getTime() / ms) * ms);
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}
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function formatDateTimeForEvent(dateTime: Date, locale: Locale): string {
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return format(dateTime, "PPp", { locale });
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}
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export {
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localeMonthNames,
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localeShortWeekDayNames,
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formatBytes,
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roundToNearestMinute,
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formatDateTimeForEvent,
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};
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