feat: add a filter toggle

src/lib/dateHelpers.ts

@@ -0,0 +1,40 @@
+import type { Event } from './types';
+
+export const formatDate = (dateString: string): string => {
+	const date = new Date(dateString);
+	const year = date.getFullYear();
+	const month = String(date.getMonth() + 1).padStart(2, '0');
+	const day = String(date.getDate()).padStart(2, '0');
+	return `${year}/${month}/${day}`;
+};
+
+export const formatTime = (timeString: string): string => {
+	const [hours, minutes] = timeString.split(':');
+	return `${hours}:${minutes}`;
+};
+
+// Helper function to check if an event is within a time range
+export const isEventInTimeRange = (event: Event, timeFilter: string): boolean => {
+	if (timeFilter === 'any') return true;
+
+	const eventDate = new Date(`${event.date}T${event.time}`);
+	const now = new Date();
+
+	// Handle temporal status filters
+	if (timeFilter === 'upcoming') {
+		return eventDate >= now;
+	}
+
+	if (timeFilter === 'past') {
+		return eventDate < now;
+	}
+
+	// Handle time range filters
+	const ranges: Record<string, Date> = {
+		'next-week': new Date(now.getTime() + 7 * 24 * 60 * 60 * 1000),
+		'next-month': new Date(new Date(now).setMonth(now.getMonth() + 1))
+	};
+
+	const endDate = ranges[timeFilter];
+	return endDate ? eventDate >= now && eventDate <= endDate : true;
+};