[skip ci] Initial commit — CodexBar Mobile Expo app

lib/timeUtils.ts

@@ -0,0 +1,25 @@
+export function formatResetCountdown(resetAtSeconds: number): string {
+  const nowSeconds = Math.floor(Date.now() / 1000);
+  const diffSeconds = resetAtSeconds - nowSeconds;
+
+  if (diffSeconds <= 0) return "resetting now";
+  if (diffSeconds < 60) return "resets in <1m";
+
+  const hours = Math.floor(diffSeconds / 3600);
+  const minutes = Math.floor((diffSeconds % 3600) / 60);
+
+  if (hours > 0 && minutes > 0) return `resets in ${hours}h ${minutes}m`;
+  if (hours > 0) return `resets in ${hours}h`;
+  return `resets in ${minutes}m`;
+}
+
+export function formatResetCountdownISO(isoString: string): string {
+  const resetAtSeconds = Math.floor(new Date(isoString).getTime() / 1000);
+  return formatResetCountdown(resetAtSeconds);
+}
+
+export function windowLabel(limitWindowSeconds: number): string {
+  if (limitWindowSeconds <= 3600) return "1h window";
+  if (limitWindowSeconds <= 86400) return "24h window";
+  return `${Math.round(limitWindowSeconds / 3600)}h window`;
+}