Move to monorepo for React Native!

apps/next/src/lib/utils.ts

@@ -0,0 +1,57 @@
+import { clsx, type ClassValue } from 'clsx';
+import { twMerge } from 'tailwind-merge';
+import { type Timestamp } from '@/lib/types';
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+
+export const ccn = ({
+  context,
+  className,
+  on = '',
+  off = '',
+}: {
+  context: boolean;
+  className: string;
+  on: string;
+  off: string;
+}) => {
+  return twMerge(className, context ? on : off);
+};
+
+const toDate = (ts: Timestamp): Date | null => {
+  if (ts instanceof Date) return isNaN(ts.getTime()) ? null : ts;
+
+  if (typeof ts === 'number') {
+    // Heuristic: treat small numbers as seconds
+    const ms = ts < 1_000_000_000_000 ? ts * 1000 : ts;
+    const d = new Date(ms);
+    return isNaN(d.getTime()) ? null : d;
+  }
+
+  // string: try numeric first, then ISO/date string
+  const asNum = Number(ts);
+  const d =
+    Number.isFinite(asNum) && asNum !== 0 ? toDate(asNum) : new Date(ts);
+
+  return d && !isNaN(d.getTime()) ? d : null;
+};
+
+export const formatTime = (timestamp: Timestamp, locale = 'en-US'): string => {
+  const date = toDate(timestamp);
+  if (!date) return '--:--';
+  return date.toLocaleTimeString(locale, {
+    hour: 'numeric',
+    minute: 'numeric',
+  });
+};
+
+export const formatDate = (timestamp: Timestamp, locale = 'en-US'): string => {
+  const date = toDate(timestamp);
+  if (!date) return '--/--';
+  return date.toLocaleDateString(locale, {
+    month: 'long',
+    day: 'numeric',
+  });
+};