add block duration and test

event-dates.json

@@ -1,7 +1,8 @@
 {
   "eventDates": ["2025-09-05", "2025-10-25", "2025-12-06", "1999-01-01"],
   "cutoffTime": "23:00",
+  "blockDurationHours": 6,
   "message": "Sign-ups are closed for today's event. Please come back tomorrow.",
 
-  "internalComment": "Add event dates in YYYY-MM-DD format. Signups will be disabled after 11pm (23:00) on these dates by default."
+  "internalComment": "Add event dates in YYYY-MM-DD format. Signups will be disabled after cutoffTime (23:00) for blockDurationHours (6 hours)."
 }

lib/signup-time-check.test.ts

@@ -0,0 +1,40 @@
+import { isSignupBlocked } from "./signup-time-check";
+
+// Test helper to check different scenarios
+function testScenario(description: string, date: Date, expected: boolean) {
+  const result = isSignupBlocked(date);
+  const status = result.blocked === expected ? "✅ PASS" : "❌ FAIL";
+  console.log(`${status} ${description}`);
+  console.log(`  Expected blocked: ${expected}, Got: ${result.blocked}`);
+  if (result.message) {
+    console.log(`  Message: ${result.message}`);
+  }
+  console.log();
+}
+
+// Run tests
+console.log("Testing signup blocking logic...\n");
+
+// October 25, 2025 at 22:00 (before cutoff)
+testScenario("Oct 25 at 22:00 - Before cutoff", new Date("2025-10-25T22:00:00"), false);
+
+// October 25, 2025 at 23:00 (exactly at cutoff)
+testScenario("Oct 25 at 23:00 - At cutoff time", new Date("2025-10-25T23:00:00"), true);
+
+// October 25, 2025 at 23:30 (during block period)
+testScenario("Oct 25 at 23:30 - During block period", new Date("2025-10-25T23:30:00"), true);
+
+// October 26, 2025 at 02:00 (3 hours into block)
+testScenario("Oct 26 at 02:00 - 3 hours into block", new Date("2025-10-26T02:00:00"), true);
+
+// October 26, 2025 at 04:59 (just before block ends)
+testScenario("Oct 26 at 04:59:59 - Just before block ends", new Date("2025-10-26T04:59:59"), true);
+
+// October 26, 2025 at 05:00 (block period over)
+testScenario("Oct 26 at 05:00 - Block period ended", new Date("2025-10-26T05:00:00"), false);
+
+// October 26, 2025 at 12:00 (well after block)
+testScenario("Oct 26 at 12:00 - Well after block", new Date("2025-10-26T12:00:00"), false);
+
+// Random non-event date
+testScenario("Oct 20 at 23:00 - Non-event date", new Date("2025-10-20T23:00:00"), false);

lib/signup-time-check.ts

@@ -1,17 +1,23 @@
 import eventConfig from "@/event-dates.json";
 
-export function isSignupBlocked(): { blocked: boolean; message?: string } {
+export function isSignupBlocked(currentTime?: Date): { blocked: boolean; message?: string } {
-  const now = new Date();
+  const now = currentTime || new Date();
-  const currentDate = now.toISOString().split("T")[0]; // YYYY-MM-DD format
-  const currentTime = now.toTimeString().slice(0, 5); // HH:MM format
-
-  // Check if today is an event date
-  const isEventDay = eventConfig.eventDates.includes(currentDate);
-
-  if (isEventDay) {
-    // Check if current time is after the cutoff time (default 15:00 / 3pm)
   const cutoffTime = eventConfig.cutoffTime || "15:00";
-    if (currentTime >= cutoffTime) {
+  const blockDurationHours = eventConfig.blockDurationHours || 6;
+
+  // Check each event date to see if we're in a block period
+  for (const eventDate of eventConfig.eventDates) {
+    // Parse the event date and cutoff time in local timezone
+    const [year, month, day] = eventDate.split("-").map(Number);
+    const [hours, minutes] = cutoffTime.split(":").map(Number);
+    const blockStart = new Date(year, month - 1, day, hours, minutes, 0, 0);
+
+    // Calculate when the block period ends (using wall-clock hours to handle DST correctly)
+    const blockEnd = new Date(blockStart);
+    blockEnd.setHours(blockStart.getHours() + blockDurationHours);
+
+    // Check if current time is within the block period
+    if (now >= blockStart && now < blockEnd) {
       return {
         blocked: true,
         message: eventConfig.message,