feat(tmp): invite link feature

src/lib/inviteTokenHelpers.ts

@@ -0,0 +1,33 @@
+import { randomBytes } from 'crypto';
+
+/**
+ * Generates a secure random token for invite links
+ * @param length - Length of the token (default: 32)
+ * @returns A random hex string
+ */
+export function generateInviteToken(length: number = 32): string {
+	return randomBytes(length / 2).toString('hex');
+}
+
+/**
+ * Calculates the expiration time for an invite token
+ * The token expires when the event starts
+ * @param eventDate - The event date in YYYY-MM-DD format
+ * @param eventTime - The event time in HH:MM:SS format
+ * @returns ISO string of the expiration time
+ */
+export function calculateTokenExpiration(eventDate: string, eventTime: string): string {
+	const eventDateTime = new Date(`${eventDate}T${eventTime}`);
+	return eventDateTime.toISOString();
+}
+
+/**
+ * Checks if an invite token is still valid
+ * @param expiresAt - The expiration time as ISO string
+ * @returns true if token is still valid, false otherwise
+ */
+export function isTokenValid(expiresAt: string): boolean {
+	const now = new Date();
+	const expiration = new Date(expiresAt);
+	return now < expiration;
+}