Bernard Ngandu
81 lines
2.1 KiB
TypeScript
81 lines
2.1 KiB
TypeScript
import { type ClassValue, clsx } from "clsx";
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import { twMerge } from "tailwind-merge";
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export type Coordinates = {
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lat: number;
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lng: number;
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};
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export function cn(...inputs: ClassValue[]): string {
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return twMerge(clsx(inputs));
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}
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export function formatCoordinate(value: number, locale = "en-US"): string {
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const formatter = new Intl.NumberFormat(locale, {
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minimumFractionDigits: 3,
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maximumFractionDigits: 3,
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});
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return formatter.format(value);
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}
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export function formatRelativeTime(dateIso: string, locale = "en-US"): string {
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const date = new Date(dateIso);
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const now = new Date();
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const diff = Math.max(0, now.getTime() - date.getTime());
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const seconds = Math.floor(diff / 1000);
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const rtf = new Intl.RelativeTimeFormat(locale, { numeric: "auto" });
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if (seconds < 60) {
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return rtf.format(-seconds, "second");
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}
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const minutes = Math.floor(seconds / 60);
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if (minutes < 60) {
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return rtf.format(-minutes, "minute");
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}
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const hours = Math.floor(minutes / 60);
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if (hours < 24) {
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return rtf.format(-hours, "hour");
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}
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const days = Math.floor(hours / 24);
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if (days < 7) {
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return rtf.format(-days, "day");
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}
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const weeks = Math.floor(days / 7);
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return rtf.format(-weeks, "week");
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}
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export function formatTimestamp(dateIso: string, locale = "en-US"): string {
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const date = new Date(dateIso);
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return new Intl.DateTimeFormat(locale, {
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month: "short",
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day: "numeric",
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hour: "numeric",
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minute: "2-digit",
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}).format(date);
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}
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const EARTH_RADIUS_KM = 6371;
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export function distanceInKm(a: Coordinates, b: Coordinates): number {
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const lat1 = toRadians(a.lat);
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const lat2 = toRadians(b.lat);
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const deltaLat = toRadians(b.lat - a.lat);
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const deltaLng = toRadians(b.lng - a.lng);
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const haversine =
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Math.sin(deltaLat / 2) * Math.sin(deltaLat / 2) +
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Math.cos(lat1) * Math.cos(lat2) * Math.sin(deltaLng / 2) * Math.sin(deltaLng / 2);
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const c = 2 * Math.atan2(Math.sqrt(haversine), Math.sqrt(1 - haversine));
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return EARTH_RADIUS_KM * c;
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}
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function toRadians(value: number): number {
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return (value * Math.PI) / 180;
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}
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