From 7008804ada35f711d26bca8f392cd998844760b4 Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Wed, 26 Nov 2025 20:42:45 -0500
Subject: [PATCH 1/7] Basic email subscription completed

Implements event subscription API, 24h reminder scheduling, and email notifications. Adds database schema for subscriptions, utility functions for event parsing and email validation, and integrates Brevo for transactional emails. Updates environment variables and dependencies to support PostgreSQL, scheduling, and email delivery.
---
 app/api/events/route.ts        |  36 +-
 app/api/subscriptions/route.ts |  83 +++
 db/schema.sql                  |  18 +
 dev.env                        |   6 +-
 lib/db.ts                      |  23 +
 lib/email/send.ts              |  75 +++
 lib/scheduler.ts               |  81 +++
 lib/subscriptions.ts           |  49 ++
 lib/utils.ts                   |  42 ++
 package-lock.json              | 941 ++++++++++++++++++++++++++++-----
 package.json                   |   5 +-
 11 files changed, 1198 insertions(+), 161 deletions(-)
 create mode 100644 app/api/subscriptions/route.ts
 create mode 100644 db/schema.sql
 create mode 100644 lib/db.ts
 create mode 100644 lib/email/send.ts
 create mode 100644 lib/scheduler.ts
 create mode 100644 lib/subscriptions.ts

diff --git a/app/api/events/route.ts b/app/api/events/route.ts
index 9025164..a2ce5b7 100644
--- a/app/api/events/route.ts
+++ b/app/api/events/route.ts
@@ -1,40 +1,6 @@
 import { NextResponse } from "next/server";
 import { fetchEventsFromSheet } from "@/lib/parseCsv";
-
-function parseDate(value: string) {
-  if (!value) return null;
-  const d = new Date(value);
-  return isNaN(d.getTime()) ? null : d.toISOString();
-}
-
-function cleanEvent(raw: Record<string, any>) {
-  const mapKey = (k: string) => {
-    const lower = k.toLowerCase().trim();
-    if (lower === "title" || lower === "name") return "title";
-    if (lower === "description" || lower === "desc") return "description";
-    if (lower === "date") return "date";
-    if (lower === "location" || lower === "venue") return "location";
-    if (lower === "isupcoming" || lower === "upcoming") return "isUpcoming";
-    if (lower === "link") return "link";
-    return lower;
-  };
-
-  const out: any = {};
-  for (const k of Object.keys(raw)) {
-    const nk = mapKey(k);
-    out[nk] = raw[k];
-  }
-
-  out.isUpcoming = Boolean(out.isupcoming || out.isUpcoming || out["isUpcoming"]);
-  if (typeof out.isUpcoming === "string") {
-    out.isUpcoming = out.isUpcoming.toLowerCase() === "true";
-  }
-
-  out.date = parseDate(out.date || out.start_date || out["start date"] || "");
-  out.id = out.id || `${(out.title || "event").toString().toLowerCase().replace(/[^a-z0-9]+/g, "-")}-${out.date || ""}`;
-
-  return out;
-}
+import { cleanEvent } from "@/lib/utils";
 
 export async function GET() {
   try {
diff --git a/app/api/subscriptions/route.ts b/app/api/subscriptions/route.ts
new file mode 100644
index 0000000..38805ad
--- /dev/null
+++ b/app/api/subscriptions/route.ts
@@ -0,0 +1,83 @@
+import { NextResponse } from 'next/server';
+import { fetchEventsFromSheet } from '@/lib/parseCsv';
+import { isValidEmail } from '@/lib/utils';
+import { subscribe } from '@/lib/subscriptions';
+import { sendImmediateConfirmation } from '@/lib/email/send';
+
+function normalizeTitle(value: string | undefined | null) {
+    return (value || '').trim();
+}
+
+function parseIsoDate(value: string | undefined | null) {
+    if (!value) return null;
+    const d = new Date(value);
+    return isNaN(d.getTime()) ? null : d.toISOString();
+}
+
+function getStartIso(row: Record<string, any>) {
+    return (
+        parseIsoDate(row.date) ||
+        parseIsoDate(row.start_date) ||
+        parseIsoDate(row['start date']) ||
+        null
+    );
+}
+
+function makeEventId(title: string, startIso: string | null) {
+    const base = title.toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '');
+    return startIso ? `${base}-${startIso}` : base;
+}
+
+async function getEvent(eventTitle: string) {
+        const raw = await fetchEventsFromSheet();
+        const want = normalizeTitle(eventTitle);
+        // Look for matching title or name
+        const row = (raw || []).find((r: any) => normalizeTitle((r as any).title) === want || normalizeTitle((r as any).name) === want);
+        if (!row) {
+            throw new Error('Event not found');
+        }
+        const startIso = getStartIso(row);
+        if (!startIso) {
+            throw new Error('Event start time is invalid');
+        }
+        const r: any = row as any;
+        const title = normalizeTitle(r.title || r.name || 'Untitled');
+        const id = r.id || makeEventId(title, startIso);
+        const link = r.link || null;
+        const location = r.location || r.venue || null;
+        return { id, title, date: startIso, link, location } as { id: string; title: string; date: string; link: string | null; location: string | null };
+}
+
+// API Route Handler
+export async function POST(request: Request) {
+    try {
+        const { email, eventTitle } = await request.json();
+        if (!isValidEmail(String(email))) {
+            return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
+        }
+        const event = await getEvent(String(eventTitle));
+
+        const nowMs = Date.now();
+        const startMs = new Date(event.date).getTime();
+        if (isNaN(startMs)) {
+          return NextResponse.json({ error: 'Event start time invalid' }, { status: 400 });
+        }
+        if (nowMs >= startMs) {
+          return NextResponse.json({ error: 'Event already started or passed' }, { status: 400 });
+        }
+        const reminderMs = startMs - 24 * 60 * 60 * 1000;
+        const reminderDate = nowMs >= reminderMs ? null : new Date(reminderMs);
+
+        await subscribe(String(email), event.id, reminderDate);
+        // Send confirmation email
+        await sendImmediateConfirmation(
+            String(email),
+            { id: event.id, title: event.title, startTime: event.date }
+        );
+
+        return NextResponse.json({ message: 'Subscription successful' }, { status: 200 });
+
+    } catch (err) {
+        return NextResponse.json({ error: String(err) }, { status: 500 });
+    }
+}
\ No newline at end of file
diff --git a/db/schema.sql b/db/schema.sql
new file mode 100644
index 0000000..f9d23a8
--- /dev/null
+++ b/db/schema.sql
@@ -0,0 +1,18 @@
+CREATE TABLE IF NOT EXISTS subscriptions (
+  id BIGSERIAL PRIMARY KEY,
+  email TEXT NOT NULL,
+  event_id TEXT NOT NULL,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+  reminder_scheduled_for TIMESTAMPTZ,
+  reminder_sent_at TIMESTAMPTZ,
+  last_notified_at TIMESTAMPTZ
+);
+
+-- Ensure a single subscription per email+event
+CREATE UNIQUE INDEX IF NOT EXISTS idx_subscriptions_email_event
+  ON subscriptions (email, event_id);
+
+-- Speed up due-reminder queries
+CREATE INDEX IF NOT EXISTS idx_subscriptions_reminder_scheduled_for
+  ON subscriptions (reminder_scheduled_for);
diff --git a/dev.env b/dev.env
index 149504b..5348174 100644
--- a/dev.env
+++ b/dev.env
@@ -1 +1,5 @@
-NEXT_PUBLIC_EVENTS_SHEET_URL=
\ No newline at end of file
+NEXT_PUBLIC_EVENTS_SHEET_URL=
+DATABASE_URL=
+BREVO_API_KEY=
+MAIL_FROM=
+MAIL_FROM_NAME=
\ No newline at end of file
diff --git a/lib/db.ts b/lib/db.ts
new file mode 100644
index 0000000..09f91d8
--- /dev/null
+++ b/lib/db.ts
@@ -0,0 +1,23 @@
+import { Pool } from "pg";
+
+declare global {
+  var __pgPool: Pool | undefined;
+}
+
+function createPool() {
+  const url = process.env.DATABASE_URL;
+  if (!url) {
+    throw new Error("DATABASE_URL is not set");
+  }
+  return new Pool({ connectionString: url });
+}
+
+export const pool: Pool = global.__pgPool ?? createPool();
+if (!global.__pgPool) {
+  global.__pgPool = pool;
+}
+
+export async function query<T = any>(text: string, params?: any[]) {
+  const res = await pool.query<T>(text, params);
+  return res;
+}
diff --git a/lib/email/send.ts b/lib/email/send.ts
new file mode 100644
index 0000000..ed2fbe3
--- /dev/null
+++ b/lib/email/send.ts
@@ -0,0 +1,75 @@
+const API_URL = "https://api.brevo.com/v3/smtp/email";
+
+function getSender() {
+  const email = process.env.MAIL_FROM || "";
+  const name = process.env.MAIL_FROM_NAME || "";
+  if (!email) throw new Error("MAIL_FROM is not set");
+  return { email, name: name || undefined };
+}
+
+async function sendBrevo(payload: any) {
+  const apiKey = process.env.BREVO_API_KEY;
+  if (!apiKey) throw new Error("BREVO_API_KEY is not set");
+
+  const res = await fetch(API_URL, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+      "api-key": apiKey,
+    },
+    body: JSON.stringify(payload),
+  });
+
+  if (!res.ok) {
+    const text = await res.text().catch(() => "");
+    throw new Error(`Brevo send failed: ${res.status} ${res.statusText} ${text}`);
+  }
+}
+
+export async function send24hReminder(
+  email: string,
+  event: {
+    id: string;
+    title: string;
+    startTime: string;
+    link?: string | null;
+    location?: string | null;
+  }
+): Promise<void> {
+  const sender = getSender();
+  const subject = `Reminder: ${event.title} in 24 hours`;
+  const dateFmt = new Date(event.startTime).toLocaleString("en-CA", { timeZone: "UTC" });
+  const html = `
+    <div style="font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;">
+      <h2>Reminder: ${event.title}</h2>
+      <p>Your event starts at <strong>${dateFmt} (UTC)</strong>.</p>
+      ${event.location ? `<p>Location: ${event.location}</p>` : ""}
+      ${event.link ? `<p><a href="${event.link}">Event Details</a></p>` : ""}
+      <p>See you there!</p>
+    </div>
+  `;
+
+  await sendBrevo({
+    sender,
+    to: [{ email }],
+    subject,
+    htmlContent: html,
+  });
+}
+
+export async function sendImmediateConfirmation(
+  email: string,
+  event: { id: string; title: string; startTime?: string | null }
+): Promise<void> {
+  const sender = getSender();
+  const subject = `Subscribed: ${event.title}`;
+  const when = event.startTime ? new Date(event.startTime).toLocaleString("en-CA", { timeZone: "UTC" }) : "soon";
+  const html = `
+    <div style="font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;">
+      <h2>You're subscribed to ${event.title}</h2>
+      <p>We'll send you a reminder 24 hours before the event.</p>
+      <p>Event time: <strong>${when} (UTC)</strong></p>
+    </div>
+  `;
+  await sendBrevo({ sender, to: [{ email }], subject, htmlContent: html });
+}
diff --git a/lib/scheduler.ts b/lib/scheduler.ts
new file mode 100644
index 0000000..969c2df
--- /dev/null
+++ b/lib/scheduler.ts
@@ -0,0 +1,81 @@
+import { fetchEventsFromSheet } from "@/lib/parseCsv";
+import { getSubscribersForEventPendingReminder, markReminderSent } from "@/lib/subscriptions";
+import { send24hReminder } from "@/lib/email/send";
+
+type RawEvent = Record<string, any>;
+
+function parseIsoDate(value: string | undefined | null): string | null {
+	if (!value) return null;
+	const d = new Date(value);
+	return isNaN(d.getTime()) ? null : d.toISOString();
+}
+
+function getStartTimeIso(e: RawEvent): string | null {
+	return (
+		parseIsoDate(e.date) ||
+		parseIsoDate(e.start_date) ||
+		parseIsoDate(e["start date"]) ||
+		null
+	);
+}
+
+function in24hWindow(nowMs: number, startMs: number, toleranceMs = 15 * 60 * 1000) {
+	const twentyFourHoursMs = 24 * 60 * 60 * 1000;
+	const windowStart = startMs - twentyFourHoursMs - toleranceMs;
+	const windowEnd = startMs - twentyFourHoursMs + toleranceMs;
+	return nowMs >= windowStart && nowMs <= windowEnd;
+}
+
+function makeEventId(title: string | undefined, startIso: string | null) {
+	const base = (title || "event").toString().toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/(^-|-$)/g, "");
+	return startIso ? `${base}-${startIso}` : base;
+}
+
+export async function processEventReminders(nowIso?: string) {
+	const now = nowIso ? new Date(nowIso) : new Date();
+	const nowMs = now.getTime();
+
+	// 1) Fetch raw events from CSV/sheet
+	const rows = (await fetchEventsFromSheet()) as RawEvent[];
+
+	// 2) Filter events whose 24h-before window matches current time
+	const dueEvents = rows
+		.map((e) => {
+			const startIso = getStartTimeIso(e);
+			const startMs = startIso ? new Date(startIso).getTime() : NaN;
+			const id = e.id || makeEventId(e.title || e.name, startIso);
+			return { id, title: e.title || e.name, startIso, startMs, raw: e };
+		})
+		.filter((e) => !!e.startIso && !isNaN(e.startMs))
+		.filter((e) => in24hWindow(nowMs, e.startMs));
+
+	const summary = { processedEvents: 0, processedSubs: 0, errors: [] as string[] };
+
+	// 3) For each due event, send to subscribers who have not yet been reminded
+	for (const event of dueEvents) {
+		try {
+			const subs = await getSubscribersForEventPendingReminder(event.id);
+			for (const s of subs) {
+				try {
+					await send24hReminder(s.email, {
+						id: event.id,
+						title: String(event.title || "Untitled"),
+						startTime: event.startIso!,
+						link: event.raw?.link ?? null,
+						location: event.raw?.location ?? null,
+					});
+					await markReminderSent(s.id, new Date().toISOString());
+					summary.processedSubs += 1;
+				} catch (err: any) {
+					summary.errors.push(`sub ${s.id}: ${String(err)}`);
+				}
+			}
+			summary.processedEvents += 1;
+		} catch (err: any) {
+			summary.errors.push(`event ${event.id}: ${String(err)}`);
+		}
+	}
+
+	return summary;
+}
+
diff --git a/lib/subscriptions.ts b/lib/subscriptions.ts
new file mode 100644
index 0000000..f759580
--- /dev/null
+++ b/lib/subscriptions.ts
@@ -0,0 +1,49 @@
+import { query } from "@/lib/db";
+
+// parameters are validated in the route handler
+// reminderAtIso: pass the 24h-before timestamp or null if not scheduling yet
+export async function subscribe(
+    email: string,
+    eventID: string,
+    reminderAtIso?: Date | null
+): Promise<{ id: number; email: string; event_id: string }> {
+    const sql = `
+        INSERT INTO subscriptions (email, event_id, created_at, reminder_scheduled_for)
+        VALUES ($1, $2, NOW(), $3)
+        ON CONFLICT (email, event_id)
+        DO UPDATE SET reminder_scheduled_for = EXCLUDED.reminder_scheduled_for,
+                                    updated_at = NOW()
+        RETURNING id, email, event_id;
+    `;
+
+    const params = [email, eventID, reminderAtIso ?? null];
+    const res = await query<{ id: number; email: string; event_id: string }>(sql, params);
+    return res.rows[0];
+}
+
+// List subscribers for an event that have not received the 24h reminder yet
+export async function getSubscribersForEventPendingReminder(
+    eventID: string
+): Promise<{ id: number; email: string; event_id: string }[]> {
+    const sql = `
+        SELECT id, email, event_id
+        FROM subscriptions
+        WHERE event_id = $1
+          AND reminder_sent_at IS NULL
+    `;
+    const res = await query<{ id: number; email: string; event_id: string }>(sql, [eventID]);
+    return res.rows;
+}
+
+// Mark a subscription as reminded at the given timestamp (ISO)
+export async function markReminderSent(id: number, sentAtIso: string): Promise<void> {
+    const sql = `
+        UPDATE subscriptions
+        SET reminder_sent_at = $2,
+            last_notified_at = $2,
+            updated_at = NOW()
+        WHERE id = $1
+    `;
+    await query(sql, [id, sentAtIso]);
+}
+
diff --git a/lib/utils.ts b/lib/utils.ts
index a5ef193..60e954a 100644
--- a/lib/utils.ts
+++ b/lib/utils.ts
@@ -4,3 +4,45 @@ import { twMerge } from "tailwind-merge";
 export function cn(...inputs: ClassValue[]) {
   return twMerge(clsx(inputs));
 }
+
+export function isValidEmail(email: string) {
+  const e = (email || "").trim();
+  if (!e || e.length > 254) return false;
+  const pattern = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+  return pattern.test(e);
+}
+
+function parseDate(value: string) {
+  if (!value) return null;
+  const d = new Date(value);
+  return isNaN(d.getTime()) ? null : d.toISOString();
+}
+
+export function cleanEvent(raw: Record<string, any>) {
+  const mapKey = (k: string) => {
+    const lower = k.toLowerCase().trim();
+    if (lower === "title" || lower === "name") return "title";
+    if (lower === "description" || lower === "desc") return "description";
+    if (lower === "date") return "date";
+    if (lower === "location" || lower === "venue") return "location";
+    if (lower === "isupcoming" || lower === "upcoming") return "isUpcoming";
+    if (lower === "link") return "link";
+    return lower;
+  };
+
+  const out: any = {};
+  for (const k of Object.keys(raw)) {
+    const nk = mapKey(k);
+    out[nk] = raw[k];
+  }
+
+  out.isUpcoming = Boolean(out.isupcoming || out.isUpcoming || out["isUpcoming"]);
+  if (typeof out.isUpcoming === "string") {
+    out.isUpcoming = out.isUpcoming.toLowerCase() === "true";
+  }
+
+  out.date = parseDate(out.date || out.start_date || out["start date"] || "");
+  out.id = out.id || `${(out.title || "event").toString().toLowerCase().replace(/[^a-z0-9]+/g, "-")}-${out.date || ""}`;
+
+  return out;
+}
diff --git a/package-lock.json b/package-lock.json
index e1bd4e8..2b437f1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,6 +36,7 @@
         "@radix-ui/react-toggle": "^1.1.9",
         "@radix-ui/react-toggle-group": "^1.1.10",
         "@radix-ui/react-tooltip": "^1.2.7",
+        "@sendinblue/client": "^3.3.1",
         "@tanstack/react-query": "^5.83.0",
         "class-variance-authority": "^0.7.1",
         "clsx": "^2.1.1",
@@ -46,6 +47,8 @@
         "lucide-react": "^0.462.0",
         "next": "^14.2.0",
         "next-themes": "^0.3.0",
+        "node-cron": "^4.2.1",
+        "pg": "^8.12.0",
         "react": "^18.3.1",
         "react-day-picker": "^8.10.1",
         "react-dom": "^18.3.1",
@@ -78,7 +81,6 @@
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/@alloc/quick-lru/-/quick-lru-5.2.0.tgz",
       "integrity": "sha512-UrcABB+4bUrFABwbluTIBErXwvbsU/V7TZWfmbgJfbkwiBuziS9gxdODUyuiecfdGQ85jglMW6juS3+z5TsKLw==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=10"
@@ -367,7 +369,6 @@
       "version": "8.0.2",
       "resolved": "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz",
       "integrity": "sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==",
-      "dev": true,
       "license": "ISC",
       "dependencies": {
         "string-width": "^5.1.2",
@@ -385,7 +386,6 @@
       "version": "0.3.5",
       "resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.5.tgz",
       "integrity": "sha512-IzL8ZoEDIBRWEzlCcRhOaCupYyN5gdIK+Q6fbFdPDg6HqX6jpkItn7DFIpW9LQzXG6Df9sA7+OKnq0qlz/GaQg==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@jridgewell/set-array": "^1.2.1",
@@ -400,7 +400,6 @@
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
       "integrity": "sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6.0.0"
@@ -410,7 +409,6 @@
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/@jridgewell/set-array/-/set-array-1.2.1.tgz",
       "integrity": "sha512-R8gLRTZeyp03ymzP/6Lil/28tGeGEzhx1q2k703KGWRAI1VdvPIXdG70VJc2pAMw3NA6JKL5hhFu1sJX0Mnn/A==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=6.0.0"
@@ -420,14 +418,12 @@
       "version": "1.5.0",
       "resolved": "https://registry.npmjs.org/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.0.tgz",
       "integrity": "sha512-gv3ZRaISU3fjPAgNsriBRqGWQL6quFx04YMPW/zD8XMLsU32mhCCbfbO6KZFLjvYpCZ8zyDEgqsgf+PwPaM7GQ==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/@jridgewell/trace-mapping": {
       "version": "0.3.25",
       "resolved": "https://registry.npmjs.org/@jridgewell/trace-mapping/-/trace-mapping-0.3.25.tgz",
       "integrity": "sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "@jridgewell/resolve-uri": "^3.1.0",
@@ -588,7 +584,6 @@
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       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "emoji-regex": "^8.0.0",
@@ -4937,7 +5591,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
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-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -4947,14 +5600,12 @@
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
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-      "dev": true,
       "license": "MIT"
     },
     "node_modules/string-width-cjs/node_modules/strip-ansi": {
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-regex": "^5.0.1"
@@ -4967,7 +5618,6 @@
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.1.0.tgz",
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
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@@ -4984,7 +5634,6 @@
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
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@@ -4997,7 +5646,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
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-      "dev": true,
       "license": "MIT",
       "engines": {
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@@ -5043,7 +5691,6 @@
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
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@@ -5079,7 +5726,6 @@
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-      "dev": true,
       "license": "MIT",
       "engines": {
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@@ -5102,7 +5748,6 @@
       "version": "3.4.17",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-3.4.17.tgz",
       "integrity": "sha512-w33E2aCvSDP0tW9RZuNXadXlkHXqFzSkQew/aIa2i/Sj8fThxwovwlXHSPXTbAHwEIhBFXAedUhP2tueAKP8Og==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
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@@ -5149,7 +5794,6 @@
       "version": "3.3.1",
       "resolved": "https://registry.npmjs.org/thenify/-/thenify-3.3.1.tgz",
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-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "any-promise": "^1.0.0"
@@ -5159,7 +5803,6 @@
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/thenify-all/-/thenify-all-1.6.0.tgz",
       "integrity": "sha512-RNxQH/qI8/t3thXJDwcstUO4zeqo64+Uy/+sNVRBx4Xn2OX+OZ9oP+iJnNFqplFra2ZUVeKCSa2oVWi3T4uVmA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "thenify": ">= 3.1.0 < 4"
@@ -5178,7 +5821,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
       "integrity": "sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "is-number": "^7.0.0"
@@ -5187,6 +5829,19 @@
         "node": ">=8.0"
       }
     },
+    "node_modules/tough-cookie": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz",
+      "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "psl": "^1.1.28",
+        "punycode": "^2.1.1"
+      },
+      "engines": {
+        "node": ">=0.8"
+      }
+    },
     "node_modules/ts-api-utils": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-2.1.0.tgz",
@@ -5204,7 +5859,6 @@
       "version": "0.1.13",
       "resolved": "https://registry.npmjs.org/ts-interface-checker/-/ts-interface-checker-0.1.13.tgz",
       "integrity": "sha512-Y/arvbn+rrz3JCKl9C4kVNfTfSm2/mEp5FSz5EsZSANGPSlQrpRI5M4PKF+mJnE52jOO90PnPSc3Ur3bTQw0gA==",
-      "dev": true,
       "license": "Apache-2.0"
     },
     "node_modules/tslib": {
@@ -5213,6 +5867,24 @@
       "integrity": "sha512-jWVzBLplnCmoaTr13V9dYbiQ99wvZRd0vNWaDRg+aVYRcjDF3nDksxFDE/+fkXnKhpnUUkmx5pK/v8mCtLVqZA==",
       "license": "0BSD"
     },
+    "node_modules/tunnel-agent": {
+      "version": "0.6.0",
+      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
+      "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "safe-buffer": "^5.0.1"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
+    "node_modules/tweetnacl": {
+      "version": "0.14.5",
+      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
+      "integrity": "sha512-KXXFFdAbFXY4geFIwoyNK+f5Z1b7swfXABfL7HXCmoIWMKU3dmS26672A4EeQtDzLKy7SXmfBu51JolvEKwtGA==",
+      "license": "Unlicense"
+    },
     "node_modules/type-check": {
       "version": "0.4.0",
       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -5268,7 +5940,6 @@
       "version": "6.21.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
       "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/update-browserslist-db": {
@@ -5306,7 +5977,6 @@
       "version": "4.4.1",
       "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
       "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
-      "dev": true,
       "license": "BSD-2-Clause",
       "dependencies": {
         "punycode": "^2.1.0"
@@ -5368,9 +6038,18 @@
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
       "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
-      "dev": true,
       "license": "MIT"
     },
+    "node_modules/uuid": {
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
+      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
+      "deprecated": "Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.",
+      "license": "MIT",
+      "bin": {
+        "uuid": "bin/uuid"
+      }
+    },
     "node_modules/vaul": {
       "version": "0.9.9",
       "resolved": "https://registry.npmjs.org/vaul/-/vaul-0.9.9.tgz",
@@ -5384,6 +6063,20 @@
         "react-dom": "^16.8 || ^17.0 || ^18.0"
       }
     },
+    "node_modules/verror": {
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
+      "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
+      "engines": [
+        "node >=0.6.0"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "assert-plus": "^1.0.0",
+        "core-util-is": "1.0.2",
+        "extsprintf": "^1.2.0"
+      }
+    },
     "node_modules/victory-vendor": {
       "version": "36.9.2",
       "resolved": "https://registry.npmjs.org/victory-vendor/-/victory-vendor-36.9.2.tgz",
@@ -5410,7 +6103,6 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
       "integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
-      "dev": true,
       "license": "ISC",
       "dependencies": {
         "isexe": "^2.0.0"
@@ -5436,7 +6128,6 @@
       "version": "8.1.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-8.1.0.tgz",
       "integrity": "sha512-si7QWI6zUMq56bESFvagtmzMdGOtoxfR+Sez11Mobfc7tm+VkUckk9bW2UeffTGVUbOksxmSw0AA2gs8g71NCQ==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-styles": "^6.1.0",
@@ -5455,7 +6146,6 @@
       "version": "7.0.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-7.0.0.tgz",
       "integrity": "sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-styles": "^4.0.0",
@@ -5473,7 +6163,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -5483,14 +6172,12 @@
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
       "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/wrap-ansi-cjs/node_modules/string-width": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "emoji-regex": "^8.0.0",
@@ -5505,7 +6192,6 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-regex": "^5.0.1"
@@ -5518,7 +6204,6 @@
       "version": "6.2.1",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-6.2.1.tgz",
       "integrity": "sha512-bN798gFfQX+viw3R7yrGWRqnrN2oRkEkUjjl4JNn4E8GxxbjtG3FbrEIIY3l8/hrwUwIeCZvi4QuOTP4MErVug==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=12"
@@ -5527,11 +6212,19 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/xtend": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
+      "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.4"
+      }
+    },
     "node_modules/yaml": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.6.0.tgz",
       "integrity": "sha512-a6ae//JvKDEra2kdi1qzCyrJW/WZCgFi8ydDV+eXExl95t+5R+ijnqHJbz9tmMh8FUjx3iv2fCQ4dclAQlO2UQ==",
-      "dev": true,
       "license": "ISC",
       "bin": {
         "yaml": "bin.mjs"
diff --git a/package.json b/package.json
index 1df222b..1e98012 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
     "@radix-ui/react-toggle": "^1.1.9",
     "@radix-ui/react-toggle-group": "^1.1.10",
     "@radix-ui/react-tooltip": "^1.2.7",
+    "@sendinblue/client": "^3.3.1",
     "@tanstack/react-query": "^5.83.0",
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
@@ -46,11 +47,13 @@
     "embla-carousel-react": "^8.6.0",
     "input-otp": "^1.4.2",
     "lucide-react": "^0.462.0",
+    "next": "^14.2.0",
     "next-themes": "^0.3.0",
+    "node-cron": "^4.2.1",
+    "pg": "^8.12.0",
     "react": "^18.3.1",
     "react-day-picker": "^8.10.1",
     "react-dom": "^18.3.1",
-    "next": "^14.2.0",
     "react-hook-form": "^7.61.1",
     "react-resizable-panels": "^2.1.9",
     "recharts": "^2.15.4",

From 95f5b94ed221a866176d9d4d3acc2a8afc7b7b6b Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Fri, 28 Nov 2025 01:36:35 -0500
Subject: [PATCH 2/7] Add cron job API, improve subscriptions, add tests

Introduces a new /api/jobs endpoint for triggering scheduled reminders with secret-based authorization, documented in README. Subscription logic is improved to only send confirmation emails for new subscriptions and to handle event errors more gracefully. The scheduler and subscription queries are tightened to avoid duplicate reminders. Adds initial Vitest-based test suite and configuration.
---
 README.md                         |   22 +-
 app/api/jobs/route.ts             |   43 +
 app/api/subscriptions/route.ts    |   28 +-
 dev.env                           |    3 +-
 lib/scheduler.ts                  |    2 +-
 lib/subscriptions.ts              |   16 +-
 package-lock.json                 | 1738 +++++++++++++++++++++++++++--
 package.json                      |    7 +-
 tests/email.send.test.ts          |   45 +
 tests/scheduler.test.ts           |   41 +
 tests/setup.ts                    |    5 +
 tests/subscriptions.route.test.ts |   96 ++
 vitest.config.ts                  |   17 +
 13 files changed, 1951 insertions(+), 112 deletions(-)
 create mode 100644 app/api/jobs/route.ts
 create mode 100644 tests/email.send.test.ts
 create mode 100644 tests/scheduler.test.ts
 create mode 100644 tests/setup.ts
 create mode 100644 tests/subscriptions.route.test.ts
 create mode 100644 vitest.config.ts

diff --git a/README.md b/README.md
index 13c98de..72d557f 100644
--- a/README.md
+++ b/README.md
@@ -14,4 +14,24 @@ npm i
 
 # Step 4: Start the development server with auto-reloading and an instant preview.
 npm run dev
-```
\ No newline at end of file
+```
+
+## Cron Reminders
+
+- Endpoint: `GET/POST /api/jobs`
+- Auth: set `CRON_SECRET` in env and send either `Authorization: Bearer <CRON_SECRET>` or header `x-cron-secret: <CRON_SECRET>`.
+
+Example curl:
+
+```sh
+curl -X POST "http://localhost:3000/api/jobs" \
+	-H "Authorization: Bearer $CRON_SECRET"
+```
+
+### Platform setup (examples)
+
+- Vercel: add a Cron Job to call `/api/jobs` every 15 minutes and set `CRON_SECRET` in Project Env Vars.
+- GitHub Actions: schedule a workflow that hits the endpoint with the secret header.
+- Any external cron: ping the endpoint with the same header.
+
+This triggers the event-centric scheduler that sends 24h-before reminders and marks them as sent.
\ No newline at end of file
diff --git a/app/api/jobs/route.ts b/app/api/jobs/route.ts
new file mode 100644
index 0000000..e7b6232
--- /dev/null
+++ b/app/api/jobs/route.ts
@@ -0,0 +1,43 @@
+import { NextResponse } from "next/server";
+import { processEventReminders } from "@/lib/scheduler";
+
+function isAuthorized(req: Request) {
+  const secret = process.env.CRON_SECRET;
+  if (!secret) return false;
+  const auth = req.headers.get("authorization");
+  const header = req.headers.get("x-cron-secret");
+  if (auth && auth.toLowerCase().startsWith("bearer ")) {
+    const token = auth.slice(7);
+    if (token === secret) return true;
+  }
+  if (header && header === secret) return true;
+  return false;
+}
+
+async function handle() {
+  try {
+    const summary = await processEventReminders();
+    return NextResponse.json(summary, {
+      status: 200,
+      headers: {
+        "cache-control": "no-store",
+      },
+    });
+  } catch (err: any) {
+    return NextResponse.json({ error: String(err) }, { status: 500 });
+  }
+}
+
+export async function GET(req: Request) {
+  if (!isAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  return handle();
+}
+
+export async function POST(req: Request) {
+  if (!isAuthorized(req)) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+  return handle();
+}
diff --git a/app/api/subscriptions/route.ts b/app/api/subscriptions/route.ts
index 38805ad..27e13f2 100644
--- a/app/api/subscriptions/route.ts
+++ b/app/api/subscriptions/route.ts
@@ -55,7 +55,19 @@ export async function POST(request: Request) {
         if (!isValidEmail(String(email))) {
             return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
         }
-        const event = await getEvent(String(eventTitle));
+        let event: { id: string; title: string; date: string; link: string | null; location: string | null };
+        try {
+            event = await getEvent(String(eventTitle));
+        } catch (e: any) {
+            const msg = String(e?.message || e || "");
+            if (msg.includes("Event not found")) {
+                return NextResponse.json({ error: 'Event not found' }, { status: 404 });
+            }
+            if (msg.includes("Event start time is invalid")) {
+                return NextResponse.json({ error: 'Event start time invalid' }, { status: 400 });
+            }
+            throw e;
+        }
 
         const nowMs = Date.now();
         const startMs = new Date(event.date).getTime();
@@ -68,12 +80,14 @@ export async function POST(request: Request) {
         const reminderMs = startMs - 24 * 60 * 60 * 1000;
         const reminderDate = nowMs >= reminderMs ? null : new Date(reminderMs);
 
-        await subscribe(String(email), event.id, reminderDate);
-        // Send confirmation email
-        await sendImmediateConfirmation(
-            String(email),
-            { id: event.id, title: event.title, startTime: event.date }
-        );
+        const inserted = await subscribe(String(email), event.id, reminderDate);
+        if (inserted) {
+            // Send confirmation email only for newly created subscription
+            await sendImmediateConfirmation(
+                String(email),
+                { id: event.id, title: event.title, startTime: event.date }
+            );
+        }
 
         return NextResponse.json({ message: 'Subscription successful' }, { status: 200 });
 
diff --git a/dev.env b/dev.env
index 5348174..e7f7177 100644
--- a/dev.env
+++ b/dev.env
@@ -2,4 +2,5 @@ NEXT_PUBLIC_EVENTS_SHEET_URL=
 DATABASE_URL=
 BREVO_API_KEY=
 MAIL_FROM=
-MAIL_FROM_NAME=
\ No newline at end of file
+MAIL_FROM_NAME=
+CRON_SECRET=
\ No newline at end of file
diff --git a/lib/scheduler.ts b/lib/scheduler.ts
index 969c2df..7ca980e 100644
--- a/lib/scheduler.ts
+++ b/lib/scheduler.ts
@@ -54,7 +54,7 @@ export async function processEventReminders(nowIso?: string) {
 	// 3) For each due event, send to subscribers who have not yet been reminded
 	for (const event of dueEvents) {
 		try {
-			const subs = await getSubscribersForEventPendingReminder(event.id);
+			const subs = (await getSubscribersForEventPendingReminder(event.id)).filter((s) => !!s.reminder_scheduled_for);
 			for (const s of subs) {
 				try {
 					await send24hReminder(s.email, {
diff --git a/lib/subscriptions.ts b/lib/subscriptions.ts
index f759580..a52b7c3 100644
--- a/lib/subscriptions.ts
+++ b/lib/subscriptions.ts
@@ -6,32 +6,32 @@ export async function subscribe(
     email: string,
     eventID: string,
     reminderAtIso?: Date | null
-): Promise<{ id: number; email: string; event_id: string }> {
+): Promise<{ id: number; email: string; event_id: string } | null> {
     const sql = `
         INSERT INTO subscriptions (email, event_id, created_at, reminder_scheduled_for)
         VALUES ($1, $2, NOW(), $3)
         ON CONFLICT (email, event_id)
-        DO UPDATE SET reminder_scheduled_for = EXCLUDED.reminder_scheduled_for,
-                                    updated_at = NOW()
+        DO NOTHING
         RETURNING id, email, event_id;
     `;
 
     const params = [email, eventID, reminderAtIso ?? null];
     const res = await query<{ id: number; email: string; event_id: string }>(sql, params);
-    return res.rows[0];
+    return res.rows[0] ?? null;
 }
 
 // List subscribers for an event that have not received the 24h reminder yet
 export async function getSubscribersForEventPendingReminder(
     eventID: string
-): Promise<{ id: number; email: string; event_id: string }[]> {
+): Promise<{ id: number; email: string; event_id: string; reminder_scheduled_for: string | null }[]> {
     const sql = `
-        SELECT id, email, event_id
+        SELECT id, email, event_id, reminder_scheduled_for
         FROM subscriptions
         WHERE event_id = $1
-          AND reminder_sent_at IS NULL
+            AND reminder_sent_at IS NULL
+            AND reminder_scheduled_for IS NOT NULL
     `;
-    const res = await query<{ id: number; email: string; event_id: string }>(sql, [eventID]);
+    const res = await query<{ id: number; email: string; event_id: string; reminder_scheduled_for: string | null }>(sql, [eventID]);
     return res.rows;
 }
 
diff --git a/package-lock.json b/package-lock.json
index 2b437f1..cf14cf6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -67,6 +67,7 @@
         "@types/node": "^22.16.5",
         "@types/react": "^18.3.23",
         "@types/react-dom": "^18.3.7",
+        "@vitest/coverage-v8": "^4.0.14",
         "autoprefixer": "^10.4.21",
         "eslint": "^9.32.0",
         "eslint-plugin-react-hooks": "^5.2.0",
@@ -74,7 +75,8 @@
         "postcss": "^8.5.6",
         "tailwindcss": "^3.4.17",
         "typescript": "^5.8.3",
-        "typescript-eslint": "^8.38.0"
+        "typescript-eslint": "^8.38.0",
+        "vitest": "^4.0.14"
       }
     },
     "node_modules/@alloc/quick-lru": {
@@ -89,13 +91,515 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/@babel/helper-string-parser": {
+      "version": "7.27.1",
+      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.27.1.tgz",
+      "integrity": "sha512-qMlSxKbpRlAridDExk92nSobyDdpPijUq2DW6oDnUqd0iOGxmQjyqhMIihI9+zv4LPyZdRje2cavWPbCbWm3eA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/helper-validator-identifier": {
+      "version": "7.28.5",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.28.5.tgz",
+      "integrity": "sha512-qSs4ifwzKJSV39ucNjsvc6WVHs6b7S03sOh2OcHF9UHfVPqWWALUsNUVzhSBiItjRZoLHx7nIarVjqKVusUZ1Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/parser": {
+      "version": "7.28.5",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.28.5.tgz",
+      "integrity": "sha512-KKBU1VGYR7ORr3At5HAtUQ+TV3SzRCXmA/8OdDZiLDBIZxVyzXuztPjfLd3BV1PRAQGCMWWSHYhL0F8d5uHBDQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/types": "^7.28.5"
+      },
+      "bin": {
+        "parser": "bin/babel-parser.js"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/@babel/runtime": {
       "version": "7.28.2",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.28.2.tgz",
       "integrity": "sha512-KHp2IflsnGywDjBWDkR9iEqiWSpc8GIi0lgTT3mOElT0PP1tG26P4tmFI2YvAdzgq9RGyoHZQEIEdZy6Ec5xCA==",
       "license": "MIT",
       "engines": {
-        "node": ">=6.9.0"
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@babel/types": {
+      "version": "7.28.5",
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+        "@vitest/expect": "4.0.14",
+        "@vitest/mocker": "4.0.14",
+        "@vitest/pretty-format": "4.0.14",
+        "@vitest/runner": "4.0.14",
+        "@vitest/snapshot": "4.0.14",
+        "@vitest/spy": "4.0.14",
+        "@vitest/utils": "4.0.14",
+        "es-module-lexer": "^1.7.0",
+        "expect-type": "^1.2.2",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^3.10.0",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^0.3.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.0.3",
+        "vite": "^6.0.0 || ^7.0.0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.0.14",
+        "@vitest/browser-preview": "4.0.14",
+        "@vitest/browser-webdriverio": "4.0.14",
+        "@vitest/ui": "4.0.14",
+        "happy-dom": "*",
+        "jsdom": "*"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vitest/node_modules/picomatch": {
+      "version": "4.0.3",
+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
+      "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/which": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
@@ -6114,6 +7651,23 @@
         "node": ">= 8"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
diff --git a/package.json b/package.json
index 1e98012..b0260b6 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,8 @@
     "dev": "next dev",
     "build": "next build",
     "start": "next start",
-    "lint": "eslint ."
+    "lint": "eslint .",
+    "test": "vitest --run"
   },
   "dependencies": {
     "@hookform/resolvers": "^3.10.0",
@@ -69,6 +70,7 @@
     "@types/node": "^22.16.5",
     "@types/react": "^18.3.23",
     "@types/react-dom": "^18.3.7",
+    "@vitest/coverage-v8": "^4.0.14",
     "autoprefixer": "^10.4.21",
     "eslint": "^9.32.0",
     "eslint-plugin-react-hooks": "^5.2.0",
@@ -76,6 +78,7 @@
     "postcss": "^8.5.6",
     "tailwindcss": "^3.4.17",
     "typescript": "^5.8.3",
-    "typescript-eslint": "^8.38.0"
+    "typescript-eslint": "^8.38.0",
+    "vitest": "^4.0.14"
   }
 }
diff --git a/tests/email.send.test.ts b/tests/email.send.test.ts
new file mode 100644
index 0000000..6fbb8d7
--- /dev/null
+++ b/tests/email.send.test.ts
@@ -0,0 +1,45 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+// Lazy import after mocks when needed
+
+const API_URL = 'https://api.brevo.com/v3/smtp/email';
+
+describe('email send helpers', () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+    (global as any).fetch = vi.fn(async () => ({ ok: true, status: 200, statusText: 'OK', text: async () => '' }));
+    process.env.BREVO_API_KEY = 'test-key';
+    process.env.MAIL_FROM = 'sender@example.com';
+    process.env.MAIL_FROM_NAME = 'Sender';
+  });
+
+  it('sends immediate confirmation with proper payload', async () => {
+    const { sendImmediateConfirmation } = await import('@/lib/email/send');
+    await sendImmediateConfirmation('user@example.com', { id: 'e1', title: 'Tech Talk', startTime: '2026-03-15T04:00:00.000Z' });
+
+    expect(global.fetch).toHaveBeenCalledTimes(1);
+    const [url, init]: any = (global.fetch as any).mock.calls[0];
+    expect(url).toBe(API_URL);
+    expect(init.method).toBe('POST');
+    expect(init.headers['api-key']).toBe('test-key');
+    const body = JSON.parse(init.body);
+    expect(body.to[0].email).toBe('user@example.com');
+    expect(body.subject).toContain('Subscribed');
+  });
+
+  it('sends 24h reminder with link and location if present', async () => {
+    const { send24hReminder } = await import('@/lib/email/send');
+    await send24hReminder('user@example.com', {
+      id: 'e1',
+      title: 'Tech Talk',
+      startTime: '2026-03-15T04:00:00.000Z',
+      link: 'https://example.com',
+      location: 'Room 123',
+    });
+
+    const [, init]: any = (global.fetch as any).mock.calls[0];
+    const body = JSON.parse(init.body);
+    expect(body.subject).toContain('24 hours');
+    expect(body.to[0].email).toBe('user@example.com');
+  });
+});
diff --git a/tests/scheduler.test.ts b/tests/scheduler.test.ts
new file mode 100644
index 0000000..874ce64
--- /dev/null
+++ b/tests/scheduler.test.ts
@@ -0,0 +1,41 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+
+vi.mock('@/lib/parseCsv', () => ({
+  fetchEventsFromSheet: vi.fn(async () => [
+    { title: 'Due Soon', date: '2026-03-15T04:00:00.000Z' },
+  ]),
+}));
+
+const mockGetSubs = vi.fn(async () => [
+  { id: 1, email: 'a@example.com', event_id: 'due-soon-2026-03-15T04:00:00.000Z', reminder_scheduled_for: '2026-03-14T04:00:00.000Z' },
+  { id: 2, email: 'b@example.com', event_id: 'due-soon-2026-03-15T04:00:00.000Z', reminder_scheduled_for: null }, // should be excluded
+]);
+vi.mock('@/lib/subscriptions', () => ({
+  getSubscribersForEventPendingReminder: mockGetSubs as any,
+  markReminderSent: vi.fn(async () => {}),
+}));
+
+vi.mock('@/lib/email/send', () => ({
+  send24hReminder: vi.fn(async () => {}),
+}));
+
+describe('processEventReminders', () => {
+  beforeEach(() => {
+    vi.useRealTimers();
+  });
+
+  it('processes due events and marks reminders sent', async () => {
+    const now = new Date('2026-03-14T04:00:00.000Z'); // exactly 24h before
+    const { processEventReminders } = await import('@/lib/scheduler');
+
+    const summary = await processEventReminders(now.toISOString());
+
+    expect(summary.processedEvents).toBe(1);
+    expect(summary.processedSubs).toBe(1);
+
+    const { send24hReminder } = await import('@/lib/email/send');
+    const { markReminderSent } = await import('@/lib/subscriptions');
+    expect((send24hReminder as any).mock.calls.length).toBe(1);
+    expect((markReminderSent as any).mock.calls.length).toBe(1);
+  });
+});
diff --git a/tests/setup.ts b/tests/setup.ts
new file mode 100644
index 0000000..f3f9084
--- /dev/null
+++ b/tests/setup.ts
@@ -0,0 +1,5 @@
+// Global test setup
+process.env.BREVO_API_KEY = process.env.BREVO_API_KEY || 'test-brevo-key';
+process.env.MAIL_FROM = process.env.MAIL_FROM || 'test@example.com';
+process.env.MAIL_FROM_NAME = process.env.MAIL_FROM_NAME || 'Test Sender';
+process.env.DATABASE_URL = process.env.DATABASE_URL || 'postgres://user:pass@localhost:5432/testdb';
diff --git a/tests/subscriptions.route.test.ts b/tests/subscriptions.route.test.ts
new file mode 100644
index 0000000..228e941
--- /dev/null
+++ b/tests/subscriptions.route.test.ts
@@ -0,0 +1,96 @@
+import { describe, expect, it, vi, beforeEach } from 'vitest';
+
+vi.mock('@/lib/parseCsv', () => ({
+  fetchEventsFromSheet: vi.fn(async () => [
+    { title: 'Future Event', date: '2026-03-15T04:00:00.000Z' },
+    { title: 'Soon Event', date: new Date(Date.now() + 2 * 60 * 60 * 1000).toISOString() },
+  ]),
+}));
+
+const mockSubscribe = vi.fn(async () => ({ id: 1, email: 'you@example.com', event_id: 'future-event-...' }));
+vi.mock('@/lib/subscriptions', () => ({
+  subscribe: (...args: any[]) => mockSubscribe(...args),
+}));
+
+const mockSendImmediate = vi.fn(async () => {});
+vi.mock('@/lib/email/send', () => ({
+  sendImmediateConfirmation: (...args: any[]) => mockSendImmediate(...args),
+}));
+
+describe('POST /api/subscriptions route', () => {
+  beforeEach(() => {
+    mockSubscribe.mockClear();
+    mockSendImmediate.mockClear();
+  });
+
+  it('schedules a reminder 24h before for far-future event', async () => {
+    const { POST } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Future Event' }),
+    });
+    const res = await POST(req);
+    expect(res.status).toBe(200);
+    expect(mockSendImmediate).toHaveBeenCalledTimes(1);
+    // third arg should be a Date when >24h away
+    const [, , reminderAt] = mockSubscribe.mock.calls[0];
+    expect(reminderAt instanceof Date).toBe(true);
+  });
+
+  it('does not schedule when within 24h (null reminder date)', async () => {
+    const { POST } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Soon Event' }),
+    });
+    const res = await POST(req);
+    expect(res.status).toBe(200);
+    const [, , reminderAt] = mockSubscribe.mock.calls[0];
+    expect(reminderAt).toBeNull();
+  });
+
+  it('skips confirmation on duplicate subscription (no resend)', async () => {
+    mockSubscribe.mockResolvedValueOnce(null);
+    const { POST } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Future Event' }),
+    });
+    const res = await POST(req);
+    expect(res.status).toBe(200);
+    expect(mockSendImmediate).not.toHaveBeenCalled();
+  });
+
+  it('returns 404 when event is not found', async () => {
+    const { fetchEventsFromSheet } = await import('@/lib/parseCsv');
+    (fetchEventsFromSheet as any).mockResolvedValueOnce([]);
+
+    const { POST } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Missing Event' }),
+    });
+    const res = await POST(req);
+    expect(res.status).toBe(404);
+  });
+
+  it('returns 400 when event start time is invalid', async () => {
+    const { fetchEventsFromSheet } = await import('@/lib/parseCsv');
+    (fetchEventsFromSheet as any).mockResolvedValueOnce([
+      { title: 'Bad Event', date: 'not-a-date' },
+    ]);
+
+    const { POST } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Bad Event' }),
+    });
+    const res = await POST(req);
+    expect(res.status).toBe(400);
+  });
+});
diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 0000000..4fa7eb7
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1,17 @@
+import { defineConfig } from 'vitest/config';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+export default defineConfig({
+  test: {
+    environment: 'node',
+    setupFiles: ['tests/setup.ts'],
+  },
+  resolve: {
+    alias: {
+      '@': path.resolve(__dirname, '.'),
+    },
+  },
+});

From 34ca921a523405d11bcb09b83a304358be1c0501 Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Fri, 28 Nov 2025 21:04:50 -0500
Subject: [PATCH 3/7] Implemented Unsubscribe logic

---
 app/api/subscriptions/route.ts    | 32 ++++++++++++++++++++-
 lib/subscriptions.ts              |  9 ++++++
 tests/subscriptions.route.test.ts | 48 ++++++++++++++++++++++++++-----
 3 files changed, 81 insertions(+), 8 deletions(-)

diff --git a/app/api/subscriptions/route.ts b/app/api/subscriptions/route.ts
index 27e13f2..78a12de 100644
--- a/app/api/subscriptions/route.ts
+++ b/app/api/subscriptions/route.ts
@@ -1,7 +1,7 @@
 import { NextResponse } from 'next/server';
 import { fetchEventsFromSheet } from '@/lib/parseCsv';
 import { isValidEmail } from '@/lib/utils';
-import { subscribe } from '@/lib/subscriptions';
+import { subscribe, unsubscribe } from '@/lib/subscriptions';
 import { sendImmediateConfirmation } from '@/lib/email/send';
 
 function normalizeTitle(value: string | undefined | null) {
@@ -94,4 +94,34 @@ export async function POST(request: Request) {
     } catch (err) {
         return NextResponse.json({ error: String(err) }, { status: 500 });
     }
+}
+
+export async function DELETE(request: Request) {
+    try {
+        const { email, eventTitle } = await request.json();
+        if (!isValidEmail(String(email))) {
+            return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
+        }
+        let event;
+        try {
+            event = await getEvent(String(eventTitle));
+        } catch (e: any) {
+            const msg = String(e?.message || e || "");
+            if (msg.includes('Event not found')) {
+                return NextResponse.json({ error: 'Event not found' }, { status: 404 });
+            }
+            if (msg.includes('Event start time is invalid')) {
+                return NextResponse.json({ error: 'Event start time invalid' }, { status: 400 });
+            }
+            throw e;
+        }
+        const result = await unsubscribe(String(email), event.id);
+        if (result.deleted) {
+            return NextResponse.json({ message: 'Unsubscribed' }, { status: 200 });
+        }
+        // Use 200 for a graceful no-op to avoid 204 body constraints
+        return NextResponse.json({ message: 'No subscription found' }, { status: 200 });
+    } catch (err) {
+        return NextResponse.json({ error: String(err) }, { status: 500 });
+    }
 }
\ No newline at end of file
diff --git a/lib/subscriptions.ts b/lib/subscriptions.ts
index a52b7c3..b16707f 100644
--- a/lib/subscriptions.ts
+++ b/lib/subscriptions.ts
@@ -47,3 +47,12 @@ export async function markReminderSent(id: number, sentAtIso: string): Promise<v
     await query(sql, [id, sentAtIso]);
 }
 
+export async function unsubscribe(email: string, eventID: string): Promise<{ deleted: boolean }> {
+    const sql = `
+        DELETE FROM subscriptions
+        WHERE email = $1 AND event_id = $2
+    `;
+    const res = await query(sql, [email, eventID]);
+    return { deleted: (res as any).rowCount ? (res as any).rowCount > 0 : true };
+}
+
diff --git a/tests/subscriptions.route.test.ts b/tests/subscriptions.route.test.ts
index 228e941..a4e40c8 100644
--- a/tests/subscriptions.route.test.ts
+++ b/tests/subscriptions.route.test.ts
@@ -8,13 +8,16 @@ vi.mock('@/lib/parseCsv', () => ({
 }));
 
 const mockSubscribe = vi.fn(async () => ({ id: 1, email: 'you@example.com', event_id: 'future-event-...' }));
-vi.mock('@/lib/subscriptions', () => ({
-  subscribe: (...args: any[]) => mockSubscribe(...args),
-}));
+vi.mock('@/lib/subscriptions', async (importOriginal) => {
+  const actual = await (importOriginal as any)();
+  return Object.assign({}, actual, {
+    subscribe: mockSubscribe as any,
+  });
+});
 
 const mockSendImmediate = vi.fn(async () => {});
 vi.mock('@/lib/email/send', () => ({
-  sendImmediateConfirmation: (...args: any[]) => mockSendImmediate(...args),
+  sendImmediateConfirmation: mockSendImmediate as any,
 }));
 
 describe('POST /api/subscriptions route', () => {
@@ -34,8 +37,9 @@ describe('POST /api/subscriptions route', () => {
     expect(res.status).toBe(200);
     expect(mockSendImmediate).toHaveBeenCalledTimes(1);
     // third arg should be a Date when >24h away
-    const [, , reminderAt] = mockSubscribe.mock.calls[0];
-    expect(reminderAt instanceof Date).toBe(true);
+    const call = mockSubscribe.mock.calls[0] as any[];
+    const reminderAt = call[2] as any;
+    expect(reminderAt !== null).toBe(true);
   });
 
   it('does not schedule when within 24h (null reminder date)', async () => {
@@ -47,7 +51,8 @@ describe('POST /api/subscriptions route', () => {
     });
     const res = await POST(req);
     expect(res.status).toBe(200);
-    const [, , reminderAt] = mockSubscribe.mock.calls[0];
+    const call = mockSubscribe.mock.calls[0] as any[];
+    const reminderAt = call[2];
     expect(reminderAt).toBeNull();
   });
 
@@ -93,4 +98,33 @@ describe('POST /api/subscriptions route', () => {
     const res = await POST(req);
     expect(res.status).toBe(400);
   });
+
+  it('DELETE unsubscribes an existing subscription', async () => {
+    const { unsubscribe } = await import('@/lib/subscriptions');
+    const unsubSpy = vi.spyOn(await import('@/lib/subscriptions'), 'unsubscribe').mockResolvedValueOnce({ deleted: true });
+
+    const { DELETE } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Future Event' }),
+    });
+    const res = await DELETE(req);
+    expect(res.status).toBe(200);
+    unsubSpy.mockRestore();
+  });
+
+  it('DELETE gracefully returns 200 when no subscription exists', async () => {
+    const unsubSpy = vi.spyOn(await import('@/lib/subscriptions'), 'unsubscribe').mockResolvedValueOnce({ deleted: false });
+
+    const { DELETE } = await import('@/app/api/subscriptions/route');
+    const req = new Request('http://localhost/api/subscriptions', {
+      method: 'DELETE',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email: 'you@example.com', eventTitle: 'Future Event' }),
+    });
+    const res = await DELETE(req);
+    expect(res.status).toBe(200);
+    unsubSpy.mockRestore();
+  });
 });

From 7f4d297ef8b7e422276c433e1397357d19c79b39 Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Fri, 28 Nov 2025 21:32:42 -0500
Subject: [PATCH 4/7] Add rate limiting with Redis support to API endpoints

Introduces a unified rate limiting system with in-memory and Redis-backed options, configurable per endpoint. Adds rate limit enforcement to subscription, unsubscription, and cron job API routes. Updates documentation and environment configuration for Redis support. Includes tests for both in-memory and Redis rate limiting logic.
---
 README.md                      |  11 +++-
 app/api/jobs/route.ts          |   6 ++
 app/api/subscriptions/route.ts |  25 ++++++++
 dev.env                        |   3 +-
 lib/rateLimit.ts               |  72 +++++++++++++++++++++++
 lib/redis.ts                   |  25 ++++++++
 package-lock.json              | 101 +++++++++++++++++++++++++++++++++
 package.json                   |   1 +
 tests/rateLimit.test.ts        |  99 ++++++++++++++++++++++++++++++++
 9 files changed, 341 insertions(+), 2 deletions(-)
 create mode 100644 lib/rateLimit.ts
 create mode 100644 lib/redis.ts
 create mode 100644 tests/rateLimit.test.ts

diff --git a/README.md b/README.md
index 72d557f..a839a24 100644
--- a/README.md
+++ b/README.md
@@ -34,4 +34,13 @@ curl -X POST "http://localhost:3000/api/jobs" \
 - GitHub Actions: schedule a workflow that hits the endpoint with the secret header.
 - Any external cron: ping the endpoint with the same header.
 
-This triggers the event-centric scheduler that sends 24h-before reminders and marks them as sent.
\ No newline at end of file
+This triggers the event-centric scheduler that sends 24h-before reminders and marks them as sent.
+
+## Rate Limiting
+
+- In-memory by default; configurable per-endpoint.
+- To enable Redis-backed limits across instances, set `REDIS_URL` (or platform-provided URL) and redeploy.
+- Current limits:
+	- Subscribe: 20 req/10 min per IP; 5 req/hour per email
+	- Unsubscribe: 30 req/10 min per IP; 10 req/hour per email
+	- Cron: 4 calls/minute (global)
\ No newline at end of file
diff --git a/app/api/jobs/route.ts b/app/api/jobs/route.ts
index e7b6232..b7520fd 100644
--- a/app/api/jobs/route.ts
+++ b/app/api/jobs/route.ts
@@ -1,5 +1,6 @@
 import { NextResponse } from "next/server";
 import { processEventReminders } from "@/lib/scheduler";
+import { getBucket, allow } from "@/lib/rateLimit";
 
 function isAuthorized(req: Request) {
   const secret = process.env.CRON_SECRET;
@@ -16,6 +17,11 @@ function isAuthorized(req: Request) {
 
 async function handle() {
   try {
+    // Limit cron invocations to avoid abuse (global bucket)
+    const res = await allow('cron:jobs', 'global', 60 * 1000, 4);
+    if (!res.allowed) {
+      return NextResponse.json({ error: "Too many requests" }, { status: 429, headers: { 'retry-after': String(Math.ceil(res.retryAfterMs / 1000)) } });
+    }
     const summary = await processEventReminders();
     return NextResponse.json(summary, {
       status: 200,
diff --git a/app/api/subscriptions/route.ts b/app/api/subscriptions/route.ts
index 78a12de..efa5d1e 100644
--- a/app/api/subscriptions/route.ts
+++ b/app/api/subscriptions/route.ts
@@ -2,6 +2,7 @@ import { NextResponse } from 'next/server';
 import { fetchEventsFromSheet } from '@/lib/parseCsv';
 import { isValidEmail } from '@/lib/utils';
 import { subscribe, unsubscribe } from '@/lib/subscriptions';
+import { getBucket, getClientIp, allow } from '@/lib/rateLimit';
 import { sendImmediateConfirmation } from '@/lib/email/send';
 
 function normalizeTitle(value: string | undefined | null) {
@@ -51,10 +52,22 @@ async function getEvent(eventTitle: string) {
 // API Route Handler
 export async function POST(request: Request) {
     try {
+                const ip = getClientIp(request);
+                const ipRes = await allow('subs:ip', ip, 10 * 60 * 1000, 20);
+        if (!ipRes.allowed) {
+            return NextResponse.json({ error: 'Too many requests' }, { status: 429, headers: { 'retry-after': String(Math.ceil(ipRes.retryAfterMs / 1000)) } });
+        }
+
         const { email, eventTitle } = await request.json();
         if (!isValidEmail(String(email))) {
             return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
         }
+
+                const emailKey = String(email).toLowerCase();
+                const emailRes = await allow('subs:email', emailKey, 60 * 60 * 1000, 5);
+        if (!emailRes.allowed) {
+            return NextResponse.json({ error: 'Too many requests for this email' }, { status: 429, headers: { 'retry-after': String(Math.ceil(emailRes.retryAfterMs / 1000)) } });
+        }
         let event: { id: string; title: string; date: string; link: string | null; location: string | null };
         try {
             event = await getEvent(String(eventTitle));
@@ -98,10 +111,22 @@ export async function POST(request: Request) {
 
 export async function DELETE(request: Request) {
     try {
+                const ip = getClientIp(request);
+                const ipRes = await allow('unsub:ip', ip, 10 * 60 * 1000, 30);
+        if (!ipRes.allowed) {
+            return NextResponse.json({ error: 'Too many requests' }, { status: 429, headers: { 'retry-after': String(Math.ceil(ipRes.retryAfterMs / 1000)) } });
+        }
+
         const { email, eventTitle } = await request.json();
         if (!isValidEmail(String(email))) {
             return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
         }
+
+                const emailKey = String(email).toLowerCase();
+                const emailRes = await allow('unsub:email', emailKey, 60 * 60 * 1000, 10);
+        if (!emailRes.allowed) {
+            return NextResponse.json({ error: 'Too many requests for this email' }, { status: 429, headers: { 'retry-after': String(Math.ceil(emailRes.retryAfterMs / 1000)) } });
+        }
         let event;
         try {
             event = await getEvent(String(eventTitle));
diff --git a/dev.env b/dev.env
index e7f7177..a4ee9e4 100644
--- a/dev.env
+++ b/dev.env
@@ -3,4 +3,5 @@ DATABASE_URL=
 BREVO_API_KEY=
 MAIL_FROM=
 MAIL_FROM_NAME=
-CRON_SECRET=
\ No newline at end of file
+CRON_SECRET=
+REDIS_URL=
\ No newline at end of file
diff --git a/lib/rateLimit.ts b/lib/rateLimit.ts
new file mode 100644
index 0000000..a810a4a
--- /dev/null
+++ b/lib/rateLimit.ts
@@ -0,0 +1,72 @@
+import { getRedis } from '@/lib/redis';
+
+type Key = string;
+
+class Bucket {
+  windowMs: number;
+  max: number;
+  hits: Map<Key, { count: number; resetAt: number }>; 
+  constructor(windowMs: number, max: number) {
+    this.windowMs = windowMs;
+    this.max = max;
+    this.hits = new Map();
+  }
+  allow(key: Key) {
+    const now = Date.now();
+    const entry = this.hits.get(key);
+    if (!entry || now >= entry.resetAt) {
+      this.hits.set(key, { count: 1, resetAt: now + this.windowMs });
+      return { allowed: true, remaining: this.max - 1, retryAfterMs: 0 };
+    }
+    if (entry.count >= this.max) {
+      return { allowed: false, remaining: 0, retryAfterMs: entry.resetAt - now };
+    }
+    entry.count += 1;
+    return { allowed: true, remaining: this.max - entry.count, retryAfterMs: 0 };
+  }
+}
+
+const buckets: Record<string, Bucket> = {};
+
+export function getBucket(name: string, windowMs: number, max: number) {
+  const k = `${name}:${windowMs}:${max}`;
+  if (!buckets[k]) buckets[k] = new Bucket(windowMs, max);
+  return buckets[k];
+}
+
+export function getClientIp(req: Request) {
+  // Next.js Request headers available in App Router
+  const h = req.headers;
+  return (
+    h.get('x-forwarded-for')?.split(',')[0]?.trim() ||
+    h.get('x-real-ip') ||
+    'unknown'
+  );
+}
+
+// Unified allow() that uses Redis fixed-window if available, falls back to in-memory
+export async function allow(
+  scope: string,
+  key: string,
+  windowMs: number,
+  max: number
+): Promise<{ allowed: boolean; remaining: number; retryAfterMs: number }> {
+  const redis = await getRedis();
+  if (redis) {
+    const now = Date.now();
+    const windowStart = Math.floor(now / windowMs) * windowMs;
+    const windowKey = `rl:${scope}:${key}:${windowStart}`;
+    const count = await redis.incr(windowKey);
+    if (count === 1) {
+      await redis.pExpire(windowKey, windowMs);
+    }
+    if (count > max) {
+      const ttl = await redis.pTTL(windowKey);
+      return { allowed: false, remaining: 0, retryAfterMs: ttl > 0 ? ttl : windowMs };
+    }
+    return { allowed: true, remaining: Math.max(0, max - count), retryAfterMs: 0 };
+  }
+  // Fallback in-memory bucket
+  const bucket = getBucket(scope, windowMs, max);
+  return bucket.allow(key);
+}
diff --git a/lib/redis.ts b/lib/redis.ts
new file mode 100644
index 0000000..9fc66c0
--- /dev/null
+++ b/lib/redis.ts
@@ -0,0 +1,25 @@
+import { createClient, type RedisClientType } from 'redis';
+
+let client: RedisClientType | null = null;
+
+export async function getRedis(): Promise<RedisClientType | null> {
+  try {
+    if (client) return client;
+    const url = process.env.REDIS_URL || process.env.UPSTASH_REDIS_REST_URL || '';
+    if (!url) return null;
+    client = createClient({ url });
+    client.on('error', (err) => {
+      console.error('Redis error:', err);
+    });
+    if (!client.isOpen) await client.connect();
+    return client;
+  } catch (err) {
+    console.error('Redis connection failed:', err);
+    return null;
+  }
+}
+
+export async function closeRedis() {
+  if (client && client.isOpen) await client.quit();
+  client = null;
+}
diff --git a/package-lock.json b/package-lock.json
index cf14cf6..1b12b50 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -55,6 +55,7 @@
         "react-hook-form": "^7.61.1",
         "react-resizable-panels": "^2.1.9",
         "recharts": "^2.15.4",
+        "redis": "^4.6.14",
         "sonner": "^1.7.4",
         "tailwind-merge": "^2.6.0",
         "tailwindcss-animate": "^1.0.7",
@@ -2483,6 +2484,65 @@
       "integrity": "sha512-HPwpGIzkl28mWyZqG52jiqDJ12waP11Pa1lGoiyUkIEuMLBP0oeK/C89esbXrxsky5we7dfd8U58nm0SgAWpVw==",
       "license": "MIT"
     },
+    "node_modules/@redis/bloom": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@redis/bloom/-/bloom-1.2.0.tgz",
+      "integrity": "sha512-HG2DFjYKbpNmVXsa0keLHp/3leGJz1mjh09f2RLGGLQZzSHpkmZWuwJbAvo3QcRY8p80m5+ZdXZdYOSBLlp7Cg==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/client": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/@redis/client/-/client-1.6.1.tgz",
+      "integrity": "sha512-/KCsg3xSlR+nCK8/8ZYSknYxvXHwubJrU82F3Lm1Fp6789VQ0/3RJKfsmRXjqfaTA++23CvC3hqmqe/2GEt6Kw==",
+      "license": "MIT",
+      "dependencies": {
+        "cluster-key-slot": "1.1.2",
+        "generic-pool": "3.9.0",
+        "yallist": "4.0.0"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/@redis/graph": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@redis/graph/-/graph-1.1.1.tgz",
+      "integrity": "sha512-FEMTcTHZozZciLRl6GiiIB4zGm5z5F3F6a6FZCyrfxdKOhFlGkiAqlexWMBzCi4DcRoyiOsuLfW+cjlGWyExOw==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/json": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@redis/json/-/json-1.0.7.tgz",
+      "integrity": "sha512-6UyXfjVaTBTJtKNG4/9Z8PSpKE6XgSyEb8iwaqDcy+uKrd/DGYHTWkUdnQDyzm727V7p21WUMhsqz5oy65kPcQ==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/search": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@redis/search/-/search-1.2.0.tgz",
+      "integrity": "sha512-tYoDBbtqOVigEDMAcTGsRlMycIIjwMCgD8eR2t0NANeQmgK/lvxNAvYyb6bZDD4frHRhIHkJu2TBRvB0ERkOmw==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/time-series": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@redis/time-series/-/time-series-1.1.0.tgz",
+      "integrity": "sha512-c1Q99M5ljsIuc4YdaCwfUEXsofakb9c8+Zse2qxTadu8TalLXuAESzLvFAvNVbkmSlvlzIQOLpBCmWI9wTOt+g==",
+      "license": "MIT",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
     "node_modules/@rollup/rollup-android-arm-eabi": {
       "version": "4.53.3",
       "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.53.3.tgz",
@@ -3909,6 +3969,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/cluster-key-slot": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.2.tgz",
+      "integrity": "sha512-RMr0FhtfXemyinomL4hrWcYJxmX6deFdCxpJzhDttxgO1+bcCnkk+9drydLVDmAMG7NE6aN/fl4F7ucU/90gAA==",
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/cmdk": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/cmdk/-/cmdk-1.1.1.tgz",
@@ -4823,6 +4892,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/generic-pool": {
+      "version": "3.9.0",
+      "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-3.9.0.tgz",
+      "integrity": "sha512-hymDOu5B53XvN4QT9dBmZxPX4CWhBPPLguTZ9MMFeFa/Kg0xWVfylOVNlJji/E7yTZWFd/q9GO5TxDLq156D7g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 4"
+      }
+    },
     "node_modules/get-intrinsic": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.3.0.tgz",
@@ -6512,6 +6590,23 @@
         "decimal.js-light": "^2.4.1"
       }
     },
+    "node_modules/redis": {
+      "version": "4.7.1",
+      "resolved": "https://registry.npmjs.org/redis/-/redis-4.7.1.tgz",
+      "integrity": "sha512-S1bJDnqLftzHXHP8JsT5II/CtHWQrASX5K96REjWjlmWKrviSOLWmM7QnRLstAWsu1VBBV1ffV6DzCvxNP0UJQ==",
+      "license": "MIT",
+      "workspaces": [
+        "./packages/*"
+      ],
+      "dependencies": {
+        "@redis/bloom": "1.2.0",
+        "@redis/client": "1.6.1",
+        "@redis/graph": "1.1.1",
+        "@redis/json": "1.0.7",
+        "@redis/search": "1.2.0",
+        "@redis/time-series": "1.1.0"
+      }
+    },
     "node_modules/request": {
       "version": "2.88.2",
       "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
@@ -7775,6 +7870,12 @@
         "node": ">=0.4"
       }
     },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A==",
+      "license": "ISC"
+    },
     "node_modules/yaml": {
       "version": "2.6.0",
       "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.6.0.tgz",
diff --git a/package.json b/package.json
index b0260b6..c82e3e3 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,7 @@
     "react-dom": "^18.3.1",
     "react-hook-form": "^7.61.1",
     "react-resizable-panels": "^2.1.9",
+    "redis": "^4.6.14",
     "recharts": "^2.15.4",
     "sonner": "^1.7.4",
     "tailwind-merge": "^2.6.0",
diff --git a/tests/rateLimit.test.ts b/tests/rateLimit.test.ts
new file mode 100644
index 0000000..bf6c520
--- /dev/null
+++ b/tests/rateLimit.test.ts
@@ -0,0 +1,99 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+
+function advanceWindow(windowMs: number) {
+  // Fast-forward Date.now for window rollover
+  const now = Date.now();
+  vi.spyOn(Date, 'now').mockReturnValue(now + windowMs + 10);
+}
+
+describe('rateLimit allow() - in-memory fallback', () => {
+  beforeEach(() => {
+    vi.resetModules();
+    vi.restoreAllMocks();
+    // Mock redis module to return null so we use memory bucket
+    vi.doMock('@/lib/redis', () => ({ getRedis: vi.fn().mockResolvedValue(null) }));
+  });
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('allows up to max within window and then blocks', async () => {
+    const windowMs = 200;
+    const max = 3;
+    const scope = 'test:mem';
+    const key = 'abc';
+
+    const { allow } = await import('@/lib/rateLimit');
+    const r1 = await allow(scope, key, windowMs, max);
+    expect(r1.allowed).toBe(true);
+    expect(r1.remaining).toBe(2);
+
+    const r2 = await allow(scope, key, windowMs, max);
+    expect(r2.allowed).toBe(true);
+    expect(r2.remaining).toBe(1);
+
+    const r3 = await allow(scope, key, windowMs, max);
+    expect(r3.allowed).toBe(true);
+    expect(r3.remaining).toBe(0);
+
+    const r4 = await allow(scope, key, windowMs, max);
+    expect(r4.allowed).toBe(false);
+    expect(r4.remaining).toBe(0);
+    expect(r4.retryAfterMs).toBeGreaterThan(0);
+
+    // Advance time past window to reset
+    advanceWindow(windowMs);
+    const r5 = await allow(scope, key, windowMs, max);
+    expect(r5.allowed).toBe(true);
+    expect(r5.remaining).toBe(2);
+  });
+});
+
+describe('rateLimit allow() - Redis path', () => {
+  const incr = vi.fn();
+  const pExpire = vi.fn();
+  const pTTL = vi.fn();
+  const fakeRedis: any = {
+    incr,
+    pExpire,
+    pTTL,
+  };
+
+  beforeEach(() => {
+    vi.resetModules();
+    vi.restoreAllMocks();
+    incr.mockReset();
+    pExpire.mockReset();
+    pTTL.mockReset();
+  });
+
+  it('sets expiry on first hit and blocks after max', async () => {
+    // Mock redis module to return our fake client
+    vi.doMock('@/lib/redis', () => ({ getRedis: vi.fn().mockResolvedValue(fakeRedis) }));
+
+    const windowMs = 200;
+    const max = 2;
+    const scope = 'test:redis';
+    const key = 'xyz';
+
+    // First call -> incr returns 1, set expire called
+    incr.mockResolvedValueOnce(1);
+    const { allow } = await import('@/lib/rateLimit');
+    const r1 = await allow(scope, key, windowMs, max);
+    expect(r1.allowed).toBe(true);
+    expect(pExpire).toHaveBeenCalledTimes(1);
+
+    // Second call -> incr returns 2, still allowed
+    incr.mockResolvedValueOnce(2);
+    const r2 = await allow(scope, key, windowMs, max);
+    expect(r2.allowed).toBe(true);
+
+    // Third call -> incr returns 3 (>max), should block and use TTL
+    incr.mockResolvedValueOnce(3);
+    pTTL.mockResolvedValueOnce(150);
+    const r3 = await allow(scope, key, windowMs, max);
+    expect(r3.allowed).toBe(false);
+    expect(r3.remaining).toBe(0);
+    expect(r3.retryAfterMs).toBeGreaterThan(0);
+  });
+});

From 12ecd59477ea75ce6c795239aed3ae7396975ecf Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Fri, 26 Dec 2025 21:40:36 -0500
Subject: [PATCH 5/7] Added Cron Endpoint, Edited frontend

Introduces a SubscribeDialog component and integrates event reminder subscription into the events page, allowing users to subscribe for email reminders. Adds a new API route for cron-based reminder processing, updates EventCard to support subscription, and adjusts tsconfig target. Also includes an example .env file for configuration.
---
 .env.example                    |  18 ++++
 app/api/cron/reminders/route.ts |  30 ++++++
 app/api/jobs/route.ts           |   2 +-
 components/EventCard.tsx        |  37 ++++++-
 components/SubscribeDialog.tsx  | 175 ++++++++++++++++++++++++++++++++
 pages/events.tsx                |  49 ++++++++-
 tsconfig.json                   |   3 +-
 7 files changed, 305 insertions(+), 9 deletions(-)
 create mode 100644 .env.example
 create mode 100644 app/api/cron/reminders/route.ts
 create mode 100644 components/SubscribeDialog.tsx

diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..1460b9e
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,18 @@
+# Brevo (Sendinblue) API key for sending emails
+BREVO_API_KEY=
+
+# PostgreSQL connection string
+DATABASE_URL=postgres://user:password@localhost:5432/dbname
+
+# Google Sheets CSV URL (publish your sheet to web as CSV)
+NEXT_PUBLIC_EVENTS_SHEET_URL=
+
+# Email sender configuration
+MAIL_FROM=noreply@example.com
+MAIL_FROM_NAME=Your Club Name
+
+# Secret for authenticating cron job requests
+CRON_SECRET=
+
+# Optional: Redis URL for rate limiting (falls back to in-memory if not set)
+REDIS_URL=
diff --git a/app/api/cron/reminders/route.ts b/app/api/cron/reminders/route.ts
new file mode 100644
index 0000000..d73994e
--- /dev/null
+++ b/app/api/cron/reminders/route.ts
@@ -0,0 +1,30 @@
+import { NextResponse } from 'next/server';
+import { processEventReminders } from '@/lib/scheduler';
+
+// This endpoint should be called by a cron job (e.g., Vercel Cron, GitHub Actions)
+// Recommended: Run every 15 minutes to catch the 24h window
+
+export async function GET(request: Request) {
+    const authHeader = request.headers.get('authorization'); // verify cron for security
+    const cronSecret = process.env.CRON_SECRET;
+    
+    if (cronSecret && authHeader !== `Bearer ${cronSecret}`) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    try {
+        const result = await processEventReminders();
+        return NextResponse.json({
+            success: true,
+            processedEvents: result.processedEvents,
+            processedSubs: result.processedSubs,
+            errors: result.errors.length > 0 ? result.errors : undefined,
+        }, { status: 200 });
+    } catch (err) {
+        return NextResponse.json({ error: String(err) }, { status: 500 });
+    }
+}
+
+export async function POST(request: Request) {
+    return GET(request);
+}
diff --git a/app/api/jobs/route.ts b/app/api/jobs/route.ts
index b7520fd..7e7ff68 100644
--- a/app/api/jobs/route.ts
+++ b/app/api/jobs/route.ts
@@ -17,7 +17,7 @@ function isAuthorized(req: Request) {
 
 async function handle() {
   try {
-    // Limit cron invocations to avoid abuse (global bucket)
+    // Limit cron invocations to avoid abuse
     const res = await allow('cron:jobs', 'global', 60 * 1000, 4);
     if (!res.allowed) {
       return NextResponse.json({ error: "Too many requests" }, { status: 429, headers: { 'retry-after': String(Math.ceil(res.retryAfterMs / 1000)) } });
diff --git a/components/EventCard.tsx b/components/EventCard.tsx
index 3df3f81..cbf3c0a 100644
--- a/components/EventCard.tsx
+++ b/components/EventCard.tsx
@@ -1,22 +1,35 @@
-import { Calendar, MapPin } from "lucide-react";
+import { Calendar, MapPin, Bell } from "lucide-react";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
 
 interface EventCardProps {
   title: string;
   date: string;
   location: string;
   description: string;
+  isUpcoming?: boolean;
+  onSubscribe?: (title: string, date: string) => void;
 }
 
-const EventCard = ({ title, date, location, description }: EventCardProps) => {
+const EventCard = ({ title, date, location, description, isUpcoming, onSubscribe }: EventCardProps) => {
+  const formattedDate = date
+    ? new Date(date).toLocaleDateString("en-US", {
+        weekday: "short",
+        month: "short",
+        day: "numeric",
+        hour: "numeric",
+        minute: "2-digit",
+      })
+    : "";
+
   return (
-    <Card className="card-hover cursor-pointer">
+    <Card className="card-hover">
       <CardHeader>
         <CardTitle className="text-xl">{title}</CardTitle>
         <CardDescription className="flex flex-col gap-2 pt-2">
           <div className="flex items-center gap-2 text-sm">
             <Calendar className="h-4 w-4 text-primary" />
-            <span>{date}</span>
+            <span>{formattedDate || date}</span>
           </div>
           <div className="flex items-center gap-2 text-sm">
             <MapPin className="h-4 w-4 text-primary" />
@@ -24,8 +37,22 @@ const EventCard = ({ title, date, location, description }: EventCardProps) => {
           </div>
         </CardDescription>
       </CardHeader>
-      <CardContent>
+      <CardContent className="flex flex-col gap-4">
         <p className="text-muted-foreground">{description}</p>
+        {isUpcoming && onSubscribe && (
+          <Button
+            variant="outline"
+            size="sm"
+            className="w-full"
+            onClick={(e) => {
+              e.stopPropagation();
+              onSubscribe(title, date);
+            }}
+          >
+            <Bell className="mr-2 h-4 w-4" />
+            Get Reminder
+          </Button>
+        )}
       </CardContent>
     </Card>
   );
diff --git a/components/SubscribeDialog.tsx b/components/SubscribeDialog.tsx
new file mode 100644
index 0000000..8e2b58c
--- /dev/null
+++ b/components/SubscribeDialog.tsx
@@ -0,0 +1,175 @@
+"use client";
+
+import { useState } from "react";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Loader2, Mail, CheckCircle2 } from "lucide-react";
+
+interface SubscribeDialogProps {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  eventTitle: string;
+  eventDate: string;
+  onSuccess?: () => void;
+  onError?: (message: string) => void;
+}
+
+export default function SubscribeDialog({
+  open,
+  onOpenChange,
+  eventTitle,
+  eventDate,
+  onSuccess,
+  onError,
+}: SubscribeDialogProps) {
+  const [email, setEmail] = useState("");
+  const [loading, setLoading] = useState(false);
+  const [success, setSuccess] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    setError(null);
+    setLoading(true);
+
+    try {
+      const res = await fetch("/api/subscriptions", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ email, eventTitle }),
+      });
+
+      const data = await res.json();
+
+      if (!res.ok) {
+        throw new Error(data.error || "Failed to subscribe");
+      }
+
+      setSuccess(true);
+      onSuccess?.();
+      
+      // Close dialog after showing success
+      setTimeout(() => {
+        onOpenChange(false);
+        // Reset state after close animation
+        setTimeout(() => {
+          setSuccess(false);
+          setEmail("");
+        }, 300);
+      }, 2000);
+    } catch (err: any) {
+      const message = err?.message || "Something went wrong";
+      setError(message);
+      onError?.(message);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleOpenChange = (newOpen: boolean) => {
+    if (!loading) {
+      onOpenChange(newOpen);
+      if (!newOpen) {
+        // Reset state when closing
+        setTimeout(() => {
+          setSuccess(false);
+          setError(null);
+          setEmail("");
+        }, 300);
+      }
+    }
+  };
+
+  const formattedDate = eventDate
+    ? new Date(eventDate).toLocaleDateString("en-US", {
+        weekday: "long",
+        year: "numeric",
+        month: "long",
+        day: "numeric",
+        hour: "numeric",
+        minute: "2-digit",
+      })
+    : "";
+
+  return (
+    <Dialog open={open} onOpenChange={handleOpenChange}>
+      <DialogContent className="sm:max-w-[425px]">
+        <DialogHeader>
+          <DialogTitle className="flex items-center gap-2">
+            <Mail className="h-5 w-5 text-primary" />
+            Subscribe to Event
+          </DialogTitle>
+          <DialogDescription className="text-left">
+            Get a reminder 24 hours before <strong>{eventTitle}</strong>
+            {formattedDate && (
+              <span className="block text-sm mt-1 text-muted-foreground">
+                {formattedDate}
+              </span>
+            )}
+          </DialogDescription>
+        </DialogHeader>
+
+        {success ? (
+          <div className="flex flex-col items-center justify-center py-8 gap-3">
+            <CheckCircle2 className="h-12 w-12 text-green-500" />
+            <p className="text-center font-medium">You&apos;re subscribed!</p>
+            <p className="text-center text-sm text-muted-foreground">
+              Check your email for confirmation.
+            </p>
+          </div>
+        ) : (
+          <form onSubmit={handleSubmit}>
+            <div className="grid gap-4 py-4">
+              <div className="grid gap-2">
+                <Label htmlFor="email">Email address</Label>
+                <Input
+                  id="email"
+                  type="email"
+                  placeholder="you@example.com"
+                  value={email}
+                  onChange={(e) => setEmail(e.target.value)}
+                  required
+                  disabled={loading}
+                  autoComplete="email"
+                  autoFocus
+                />
+              </div>
+              {error && (
+                <p className="text-sm text-destructive">{error}</p>
+              )}
+            </div>
+            <DialogFooter>
+              <Button
+                type="button"
+                variant="outline"
+                onClick={() => handleOpenChange(false)}
+                disabled={loading}
+              >
+                Cancel
+              </Button>
+              <Button type="submit" disabled={loading || !email}>
+                {loading ? (
+                  <>
+                    <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+                    Subscribing...
+                  </>
+                ) : (
+                  "Subscribe"
+                )}
+              </Button>
+            </DialogFooter>
+          </form>
+        )}
+      </DialogContent>
+    </Dialog>
+  );
+}
diff --git a/pages/events.tsx b/pages/events.tsx
index e8d8ffc..29973cb 100644
--- a/pages/events.tsx
+++ b/pages/events.tsx
@@ -1,12 +1,22 @@
 import Navbar from "@/components/Navbar";
 import Footer from "@/components/Footer";
 import EventCard from "@/components/EventCard";
+import SubscribeDialog from "@/components/SubscribeDialog";
 import { useEffect, useState } from "react";
+import { Toaster } from "@/components/ui/sonner";
+import { toast } from "sonner";
+
+interface SelectedEvent {
+  title: string;
+  date: string;
+}
 
 const Events = () => {
   const [upcomingEvents, setUpcomingEvents] = useState([]);
   const [pastEvents, setPastEvents] = useState([]);
   const [loading, setLoading] = useState(true);
+  const [dialogOpen, setDialogOpen] = useState(false);
+  const [selectedEvent, setSelectedEvent] = useState<SelectedEvent | null>(null);
 
   useEffect(() => {
     async function load() {
@@ -31,6 +41,23 @@ const Events = () => {
     load();
   }, []);
 
+  const handleSubscribe = (title: string, date: string) => {
+    setSelectedEvent({ title, date });
+    setDialogOpen(true);
+  };
+
+  const handleSubscribeSuccess = () => {
+    toast.success("Subscribed!", {
+      description: "You'll receive a reminder 24 hours before the event.",
+    });
+  };
+
+  const handleSubscribeError = (message: string) => {
+    toast.error("Subscription failed", {
+      description: message,
+    });
+  };
+
   if (loading) {
     return (
       <div className="min-h-screen flex items-center justify-center">
@@ -42,6 +69,7 @@ const Events = () => {
   return (
     <div className="min-h-screen flex flex-col">
       <Navbar />
+      <Toaster position="top-right" richColors />
       
       <main className="flex-grow">
         <section className="hero-gradient text-white py-16 md:py-24">
@@ -63,8 +91,13 @@ const Events = () => {
             </div>
             
             <div className="grid md:grid-cols-2 lg:grid-cols-3 gap-6">
-              {upcomingEvents.map((event, index) => (
-                <EventCard key={index} {...event} />
+              {upcomingEvents.map((event: any, index) => (
+                <EventCard
+                  key={index}
+                  {...event}
+                  isUpcoming={true}
+                  onSubscribe={handleSubscribe}
+                />
               ))}
             </div>
           </div>
@@ -103,6 +136,18 @@ const Events = () => {
       </main>
 
       <Footer />
+
+      {/* Subscribe Dialog */}
+      {selectedEvent && (
+        <SubscribeDialog
+          open={dialogOpen}
+          onOpenChange={setDialogOpen}
+          eventTitle={selectedEvent.title}
+          eventDate={selectedEvent.date}
+          onSuccess={handleSubscribeSuccess}
+          onError={handleSubscribeError}
+        />
+      )}
     </div>
   );
 };
diff --git a/tsconfig.json b/tsconfig.json
index 3fa36de..34fedb2 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -36,7 +36,8 @@
       {
         "name": "next"
       }
-    ]
+    ],
+    "target": "ES2017"
   },
   "include": [
     "next-env.d.ts",

From 799a2d3bfa091a8a969e1acf76327ae1d18c6431 Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Fri, 26 Dec 2025 21:49:01 -0500
Subject: [PATCH 6/7] Add unsubscribe feature for event reminders

Introduces unsubscribe functionality for event reminder emails. Adds API route and frontend page for unsubscribing, updates email sending logic to include unsubscribe links, and documents the base URL in .env.example.
---
 .env.example                 |   3 +
 app/api/unsubscribe/route.ts |  79 +++++++++++++++++++
 lib/email/send.ts            |  38 +++++++++
 pages/unsubscribe.tsx        | 145 +++++++++++++++++++++++++++++++++++
 4 files changed, 265 insertions(+)
 create mode 100644 app/api/unsubscribe/route.ts
 create mode 100644 pages/unsubscribe.tsx

diff --git a/.env.example b/.env.example
index 1460b9e..d5864f9 100644
--- a/.env.example
+++ b/.env.example
@@ -7,6 +7,9 @@ DATABASE_URL=postgres://user:password@localhost:5432/dbname
 # Google Sheets CSV URL (publish your sheet to web as CSV)
 NEXT_PUBLIC_EVENTS_SHEET_URL=
 
+# Base URL for email links
+NEXT_PUBLIC_BASE_URL=https://yoursite.com
+
 # Email sender configuration
 MAIL_FROM=noreply@example.com
 MAIL_FROM_NAME=Your Club Name
diff --git a/app/api/unsubscribe/route.ts b/app/api/unsubscribe/route.ts
new file mode 100644
index 0000000..815b208
--- /dev/null
+++ b/app/api/unsubscribe/route.ts
@@ -0,0 +1,79 @@
+import { NextResponse } from "next/server";
+import { parseUnsubscribeToken } from "@/lib/email/send";
+import { unsubscribe } from "@/lib/subscriptions";
+import { fetchEventsFromSheet } from "@/lib/parseCsv";
+
+function normalizeTitle(value: string | undefined | null) {
+  return (value || "").trim();
+}
+
+function parseIsoDate(value: string | undefined | null) {
+  if (!value) return null;
+  const d = new Date(value);
+  return isNaN(d.getTime()) ? null : d.toISOString();
+}
+
+function getStartIso(row: Record<string, any>) {
+  return (
+    parseIsoDate(row.date) ||
+    parseIsoDate(row.start_date) ||
+    parseIsoDate(row["start date"]) ||
+    null
+  );
+}
+
+function makeEventId(title: string, startIso: string | null) {
+  const base = title.toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/(^-|-$)/g, "");
+  return startIso ? `${base}-${startIso}` : base;
+}
+
+async function getEventId(eventTitle: string): Promise<string | null> {
+  const raw = await fetchEventsFromSheet();
+  const want = normalizeTitle(eventTitle);
+  const row = (raw || []).find(
+    (r: any) => normalizeTitle(r.title) === want || normalizeTitle(r.name) === want
+  );
+  if (!row) return null;
+  
+  const startIso = getStartIso(row);
+  const r = row as any;
+  const title = normalizeTitle(r.title || r.name || "Untitled");
+  return r.id || makeEventId(title, startIso);
+}
+
+export async function POST(request: Request) {
+  try {
+    const { token } = await request.json();
+    
+    if (!token || typeof token !== "string") {
+      return NextResponse.json({ error: "Invalid token" }, { status: 400 });
+    }
+
+    const parsed = parseUnsubscribeToken(token);
+    if (!parsed) {
+      return NextResponse.json({ error: "Invalid or expired token" }, { status: 400 });
+    }
+
+    const { email, eventTitle } = parsed;
+    
+    // Get the event ID from the title
+    const eventId = await getEventId(eventTitle);
+    if (!eventId) {
+      // Event might have been removed, but we should still try to unsubscribe by title
+      return NextResponse.json({ error: "Event not found" }, { status: 404 });
+    }
+
+    const result = await unsubscribe(email, eventId);
+    
+    if (result.deleted) {
+      return NextResponse.json({ message: "Unsubscribed successfully" }, { status: 200 });
+    }
+    
+    // No subscription found - might have already unsubscribed
+    return NextResponse.json({ message: "No subscription found" }, { status: 200 });
+    
+  } catch (err) {
+    console.error("Unsubscribe error:", err);
+    return NextResponse.json({ error: "Something went wrong" }, { status: 500 });
+  }
+}
diff --git a/lib/email/send.ts b/lib/email/send.ts
index ed2fbe3..fe06215 100644
--- a/lib/email/send.ts
+++ b/lib/email/send.ts
@@ -7,6 +7,20 @@ function getSender() {
   return { email, name: name || undefined };
 }
 
+function getBaseUrl() {
+  return process.env.NEXT_PUBLIC_BASE_URL || "http://localhost:3000";
+}
+
+function generateUnsubscribeToken(email: string, eventTitle: string): string {
+  // Simple base64 encoding - in production you might want signed tokens
+  return Buffer.from(JSON.stringify({ email, eventTitle })).toString("base64url");
+}
+
+function buildUnsubscribeUrl(email: string, eventTitle: string): string {
+  const token = generateUnsubscribeToken(email, eventTitle);
+  return `${getBaseUrl()}/unsubscribe?token=${token}`;
+}
+
 async function sendBrevo(payload: any) {
   const apiKey = process.env.BREVO_API_KEY;
   if (!apiKey) throw new Error("BREVO_API_KEY is not set");
@@ -39,6 +53,7 @@ export async function send24hReminder(
   const sender = getSender();
   const subject = `Reminder: ${event.title} in 24 hours`;
   const dateFmt = new Date(event.startTime).toLocaleString("en-CA", { timeZone: "UTC" });
+  const unsubscribeUrl = buildUnsubscribeUrl(email, event.title);
   const html = `
     <div style="font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;">
       <h2>Reminder: ${event.title}</h2>
@@ -46,6 +61,10 @@ export async function send24hReminder(
       ${event.location ? `<p>Location: ${event.location}</p>` : ""}
       ${event.link ? `<p><a href="${event.link}">Event Details</a></p>` : ""}
       <p>See you there!</p>
+      <hr style="margin: 24px 0; border: none; border-top: 1px solid #eee;" />
+      <p style="font-size: 12px; color: #666;">
+        <a href="${unsubscribeUrl}" style="color: #666;">Unsubscribe from this event</a>
+      </p>
     </div>
   `;
 
@@ -64,12 +83,31 @@ export async function sendImmediateConfirmation(
   const sender = getSender();
   const subject = `Subscribed: ${event.title}`;
   const when = event.startTime ? new Date(event.startTime).toLocaleString("en-CA", { timeZone: "UTC" }) : "soon";
+  const unsubscribeUrl = buildUnsubscribeUrl(email, event.title);
   const html = `
     <div style="font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;">
       <h2>You're subscribed to ${event.title}</h2>
       <p>We'll send you a reminder 24 hours before the event.</p>
       <p>Event time: <strong>${when} (UTC)</strong></p>
+      <hr style="margin: 24px 0; border: none; border-top: 1px solid #eee;" />
+      <p style="font-size: 12px; color: #666;">
+        Changed your mind? <a href="${unsubscribeUrl}" style="color: #666;">Unsubscribe</a>
+      </p>
     </div>
   `;
   await sendBrevo({ sender, to: [{ email }], subject, htmlContent: html });
 }
+
+// Export for use in unsubscribe page
+export function parseUnsubscribeToken(token: string): { email: string; eventTitle: string } | null {
+  try {
+    const decoded = Buffer.from(token, "base64url").toString("utf-8");
+    const data = JSON.parse(decoded);
+    if (data.email && data.eventTitle) {
+      return { email: data.email, eventTitle: data.eventTitle };
+    }
+    return null;
+  } catch {
+    return null;
+  }
+}
diff --git a/pages/unsubscribe.tsx b/pages/unsubscribe.tsx
new file mode 100644
index 0000000..fc5ecea
--- /dev/null
+++ b/pages/unsubscribe.tsx
@@ -0,0 +1,145 @@
+import { useEffect, useState } from "react";
+import { useRouter } from "next/router";
+import Navbar from "@/components/Navbar";
+import Footer from "@/components/Footer";
+import { Button } from "@/components/ui/button";
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
+import { CheckCircle2, XCircle, Loader2 } from "lucide-react";
+
+type Status = "loading" | "confirming" | "success" | "error" | "invalid";
+
+export default function Unsubscribe() {
+  const router = useRouter();
+  const { token } = router.query;
+  
+  const [status, setStatus] = useState<Status>("loading");
+  const [eventTitle, setEventTitle] = useState<string>("");
+  const [errorMessage, setErrorMessage] = useState<string>("");
+
+  useEffect(() => {
+    if (!router.isReady) return;
+    
+    if (!token || typeof token !== "string") {
+      setStatus("invalid");
+      return;
+    }
+
+    // Decode token to get event info
+    try {
+      const decoded = JSON.parse(atob(token.replace(/-/g, "+").replace(/_/g, "/")));
+      if (decoded.eventTitle) {
+        setEventTitle(decoded.eventTitle);
+        setStatus("confirming");
+      } else {
+        setStatus("invalid");
+      }
+    } catch {
+      setStatus("invalid");
+    }
+  }, [router.isReady, token]);
+
+  const handleUnsubscribe = async () => {
+    setStatus("loading");
+    
+    try {
+      const res = await fetch("/api/unsubscribe", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ token }),
+      });
+
+      const data = await res.json();
+
+      if (!res.ok) {
+        throw new Error(data.error || "Failed to unsubscribe");
+      }
+
+      setStatus("success");
+    } catch (err: any) {
+      setErrorMessage(err?.message || "Something went wrong");
+      setStatus("error");
+    }
+  };
+
+  return (
+    <div className="min-h-screen flex flex-col">
+      <Navbar />
+      
+      <main className="flex-grow flex items-center justify-center p-4">
+        <Card className="w-full max-w-md">
+          <CardHeader className="text-center">
+            <CardTitle>
+              {status === "loading" && "Processing..."}
+              {status === "confirming" && "Unsubscribe"}
+              {status === "success" && "Unsubscribed"}
+              {status === "error" && "Error"}
+              {status === "invalid" && "Invalid Link"}
+            </CardTitle>
+            <CardDescription>
+              {status === "confirming" && eventTitle && (
+                <>Unsubscribe from reminders for <strong>{eventTitle}</strong>?</>
+              )}
+            </CardDescription>
+          </CardHeader>
+          <CardContent className="flex flex-col items-center gap-4">
+            {status === "loading" && (
+              <Loader2 className="h-12 w-12 animate-spin text-muted-foreground" />
+            )}
+            
+            {status === "confirming" && (
+              <>
+                <p className="text-center text-muted-foreground">
+                  You will no longer receive reminder emails for this event.
+                </p>
+                <div className="flex gap-3">
+                  <Button variant="outline" onClick={() => router.push("/events")}>
+                    Cancel
+                  </Button>
+                  <Button variant="destructive" onClick={handleUnsubscribe}>
+                    Unsubscribe
+                  </Button>
+                </div>
+              </>
+            )}
+            
+            {status === "success" && (
+              <>
+                <CheckCircle2 className="h-12 w-12 text-green-500" />
+                <p className="text-center text-muted-foreground">
+                  You have been unsubscribed from {eventTitle || "this event"}.
+                </p>
+                <Button onClick={() => router.push("/events")}>
+                  Back to Events
+                </Button>
+              </>
+            )}
+            
+            {status === "error" && (
+              <>
+                <XCircle className="h-12 w-12 text-destructive" />
+                <p className="text-center text-destructive">{errorMessage}</p>
+                <Button variant="outline" onClick={() => setStatus("confirming")}>
+                  Try Again
+                </Button>
+              </>
+            )}
+            
+            {status === "invalid" && (
+              <>
+                <XCircle className="h-12 w-12 text-muted-foreground" />
+                <p className="text-center text-muted-foreground">
+                  This unsubscribe link is invalid or has expired.
+                </p>
+                <Button onClick={() => router.push("/events")}>
+                  Back to Events
+                </Button>
+              </>
+            )}
+          </CardContent>
+        </Card>
+      </main>
+
+      <Footer />
+    </div>
+  );
+}

From c0b94dacb4050abad7f42f5d4ae6341554d645d1 Mon Sep 17 00:00:00 2001
From: Mohamed Ebraheem <110148669+MohamedEBR@users.noreply.github.com>
Date: Tue, 30 Dec 2025 03:23:14 -0500
Subject: [PATCH 7/7] Removed Caching, Addressed IP proxy headers, Used
 BrevoAPI instead of a DB to handle subscription logic

---
 .env.example                      |   6 -
 app/api/jobs/route.ts             |   2 +-
 app/api/subscriptions/route.ts    |  54 +++---
 app/api/unsubscribe/route.ts      |   6 +-
 db/schema.sql                     |  18 --
 lib/brevo.ts                      | 277 ++++++++++++++++++++++++++++++
 lib/db.ts                         |  23 ---
 lib/rateLimit.ts                  |  80 ++++++---
 lib/redis.ts                      |  25 ---
 lib/scheduler.ts                  |  94 +++-------
 lib/subscriptions.ts              |  58 -------
 tests/rateLimit.test.ts           |  70 ++------
 tests/scheduler.test.ts           |  38 ++--
 tests/subscriptions.route.test.ts |  35 ++--
 14 files changed, 449 insertions(+), 337 deletions(-)
 delete mode 100644 db/schema.sql
 create mode 100644 lib/brevo.ts
 delete mode 100644 lib/db.ts
 delete mode 100644 lib/redis.ts
 delete mode 100644 lib/subscriptions.ts

diff --git a/.env.example b/.env.example
index d5864f9..3624a00 100644
--- a/.env.example
+++ b/.env.example
@@ -1,9 +1,6 @@
 # Brevo (Sendinblue) API key for sending emails
 BREVO_API_KEY=
 
-# PostgreSQL connection string
-DATABASE_URL=postgres://user:password@localhost:5432/dbname
-
 # Google Sheets CSV URL (publish your sheet to web as CSV)
 NEXT_PUBLIC_EVENTS_SHEET_URL=
 
@@ -16,6 +13,3 @@ MAIL_FROM_NAME=Your Club Name
 
 # Secret for authenticating cron job requests
 CRON_SECRET=
-
-# Optional: Redis URL for rate limiting (falls back to in-memory if not set)
-REDIS_URL=
diff --git a/app/api/jobs/route.ts b/app/api/jobs/route.ts
index 7e7ff68..f4d7146 100644
--- a/app/api/jobs/route.ts
+++ b/app/api/jobs/route.ts
@@ -18,7 +18,7 @@ function isAuthorized(req: Request) {
 async function handle() {
   try {
     // Limit cron invocations to avoid abuse
-    const res = await allow('cron:jobs', 'global', 60 * 1000, 4);
+    const res = allow('cron:jobs', 'global', 60 * 1000, 4);
     if (!res.allowed) {
       return NextResponse.json({ error: "Too many requests" }, { status: 429, headers: { 'retry-after': String(Math.ceil(res.retryAfterMs / 1000)) } });
     }
diff --git a/app/api/subscriptions/route.ts b/app/api/subscriptions/route.ts
index efa5d1e..fc028fb 100644
--- a/app/api/subscriptions/route.ts
+++ b/app/api/subscriptions/route.ts
@@ -1,8 +1,8 @@
 import { NextResponse } from 'next/server';
 import { fetchEventsFromSheet } from '@/lib/parseCsv';
 import { isValidEmail } from '@/lib/utils';
-import { subscribe, unsubscribe } from '@/lib/subscriptions';
-import { getBucket, getClientIp, allow } from '@/lib/rateLimit';
+import { subscribeToEvent, unsubscribeFromEvent } from '@/lib/brevo';
+import { getClientIp, allow } from '@/lib/rateLimit';
 import { sendImmediateConfirmation } from '@/lib/email/send';
 
 function normalizeTitle(value: string | undefined | null) {
@@ -52,8 +52,8 @@ async function getEvent(eventTitle: string) {
 // API Route Handler
 export async function POST(request: Request) {
     try {
-                const ip = getClientIp(request);
-                const ipRes = await allow('subs:ip', ip, 10 * 60 * 1000, 20);
+        const ip = getClientIp(request);
+        const ipRes = allow('subs:ip', ip, 10 * 60 * 1000, 20);
         if (!ipRes.allowed) {
             return NextResponse.json({ error: 'Too many requests' }, { status: 429, headers: { 'retry-after': String(Math.ceil(ipRes.retryAfterMs / 1000)) } });
         }
@@ -63,8 +63,8 @@ export async function POST(request: Request) {
             return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
         }
 
-                const emailKey = String(email).toLowerCase();
-                const emailRes = await allow('subs:email', emailKey, 60 * 60 * 1000, 5);
+        const emailKey = String(email).toLowerCase();
+        const emailRes = allow('subs:email', emailKey, 60 * 60 * 1000, 5);
         if (!emailRes.allowed) {
             return NextResponse.json({ error: 'Too many requests for this email' }, { status: 429, headers: { 'retry-after': String(Math.ceil(emailRes.retryAfterMs / 1000)) } });
         }
@@ -91,28 +91,39 @@ export async function POST(request: Request) {
           return NextResponse.json({ error: 'Event already started or passed' }, { status: 400 });
         }
         const reminderMs = startMs - 24 * 60 * 60 * 1000;
-        const reminderDate = nowMs >= reminderMs ? null : new Date(reminderMs);
-
-        const inserted = await subscribe(String(email), event.id, reminderDate);
-        if (inserted) {
-            // Send confirmation email only for newly created subscription
-            await sendImmediateConfirmation(
-                String(email),
-                { id: event.id, title: event.title, startTime: event.date }
-            );
+        const reminderIso = nowMs >= reminderMs ? null : new Date(reminderMs).toISOString();
+
+        // Subscribe via Brevo Contacts API
+        const result = await subscribeToEvent(
+            String(email),
+            event.id,
+            event.title,
+            event.date,
+            reminderIso
+        );
+
+        if (result.alreadySubscribed) {
+            return NextResponse.json({ message: 'Already subscribed' }, { status: 200 });
         }
 
+        // Send confirmation email for new subscription
+        await sendImmediateConfirmation(
+            String(email),
+            { id: event.id, title: event.title, startTime: event.date }
+        );
+
         return NextResponse.json({ message: 'Subscription successful' }, { status: 200 });
 
     } catch (err) {
+        console.error('Subscribe error:', err);
         return NextResponse.json({ error: String(err) }, { status: 500 });
     }
 }
 
 export async function DELETE(request: Request) {
     try {
-                const ip = getClientIp(request);
-                const ipRes = await allow('unsub:ip', ip, 10 * 60 * 1000, 30);
+        const ip = getClientIp(request);
+        const ipRes = allow('unsub:ip', ip, 10 * 60 * 1000, 30);
         if (!ipRes.allowed) {
             return NextResponse.json({ error: 'Too many requests' }, { status: 429, headers: { 'retry-after': String(Math.ceil(ipRes.retryAfterMs / 1000)) } });
         }
@@ -122,8 +133,8 @@ export async function DELETE(request: Request) {
             return NextResponse.json({ error: 'Invalid email address' }, { status: 400 });
         }
 
-                const emailKey = String(email).toLowerCase();
-                const emailRes = await allow('unsub:email', emailKey, 60 * 60 * 1000, 10);
+        const emailKey = String(email).toLowerCase();
+        const emailRes = allow('unsub:email', emailKey, 60 * 60 * 1000, 10);
         if (!emailRes.allowed) {
             return NextResponse.json({ error: 'Too many requests for this email' }, { status: 429, headers: { 'retry-after': String(Math.ceil(emailRes.retryAfterMs / 1000)) } });
         }
@@ -140,13 +151,14 @@ export async function DELETE(request: Request) {
             }
             throw e;
         }
-        const result = await unsubscribe(String(email), event.id);
+        // Unsubscribe via Brevo Contacts API
+        const result = await unsubscribeFromEvent(String(email), event.id);
         if (result.deleted) {
             return NextResponse.json({ message: 'Unsubscribed' }, { status: 200 });
         }
-        // Use 200 for a graceful no-op to avoid 204 body constraints
         return NextResponse.json({ message: 'No subscription found' }, { status: 200 });
     } catch (err) {
+        console.error('Unsubscribe error:', err);
         return NextResponse.json({ error: String(err) }, { status: 500 });
     }
 }
\ No newline at end of file
diff --git a/app/api/unsubscribe/route.ts b/app/api/unsubscribe/route.ts
index 815b208..4c4f9b2 100644
--- a/app/api/unsubscribe/route.ts
+++ b/app/api/unsubscribe/route.ts
@@ -1,6 +1,6 @@
 import { NextResponse } from "next/server";
 import { parseUnsubscribeToken } from "@/lib/email/send";
-import { unsubscribe } from "@/lib/subscriptions";
+import { unsubscribeFromEvent } from "@/lib/brevo";
 import { fetchEventsFromSheet } from "@/lib/parseCsv";
 
 function normalizeTitle(value: string | undefined | null) {
@@ -63,13 +63,13 @@ export async function POST(request: Request) {
       return NextResponse.json({ error: "Event not found" }, { status: 404 });
     }
 
-    const result = await unsubscribe(email, eventId);
+    // Unsubscribe via Brevo Contacts API
+    const result = await unsubscribeFromEvent(email, eventId);
     
     if (result.deleted) {
       return NextResponse.json({ message: "Unsubscribed successfully" }, { status: 200 });
     }
     
-    // No subscription found - might have already unsubscribed
     return NextResponse.json({ message: "No subscription found" }, { status: 200 });
     
   } catch (err) {
diff --git a/db/schema.sql b/db/schema.sql
deleted file mode 100644
index f9d23a8..0000000
--- a/db/schema.sql
+++ /dev/null
@@ -1,18 +0,0 @@
-CREATE TABLE IF NOT EXISTS subscriptions (
-  id BIGSERIAL PRIMARY KEY,
-  email TEXT NOT NULL,
-  event_id TEXT NOT NULL,
-  created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-  updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
-  reminder_scheduled_for TIMESTAMPTZ,
-  reminder_sent_at TIMESTAMPTZ,
-  last_notified_at TIMESTAMPTZ
-);
-
--- Ensure a single subscription per email+event
-CREATE UNIQUE INDEX IF NOT EXISTS idx_subscriptions_email_event
-  ON subscriptions (email, event_id);
-
--- Speed up due-reminder queries
-CREATE INDEX IF NOT EXISTS idx_subscriptions_reminder_scheduled_for
-  ON subscriptions (reminder_scheduled_for);
diff --git a/lib/brevo.ts b/lib/brevo.ts
new file mode 100644
index 0000000..1cf83c6
--- /dev/null
+++ b/lib/brevo.ts
@@ -0,0 +1,277 @@
+/**
+ * Brevo Contacts API for event subscriptions
+ * Stores event subscriptions as contact attributes instead of a database
+ */
+
+const CONTACTS_API = "https://api.brevo.com/v3/contacts";
+
+function getApiKey(): string {
+  const key = process.env.BREVO_API_KEY;
+  if (!key) throw new Error("BREVO_API_KEY is not set");
+  return key;
+}
+
+interface EventSubscription {
+  email: string;
+  eventId: string;
+  eventTitle: string;
+  eventDate: string; // ISO string
+  reminderScheduledFor: string | null; // ISO string or null
+  subscribedAt: string; // ISO string
+}
+
+interface BrevoContact {
+  email: string;
+  attributes?: Record<string, any>;
+  listIds?: number[];
+}
+
+/**
+ * Subscribe a user to an event by creating/updating a Brevo contact
+ */
+export async function subscribeToEvent(
+  email: string,
+  eventId: string,
+  eventTitle: string,
+  eventDate: string,
+  reminderScheduledFor: string | null
+): Promise<{ created: boolean; alreadySubscribed: boolean }> {
+  const apiKey = getApiKey();
+  
+  // First, check if contact exists and get their current subscriptions
+  const existing = await getContact(email);
+  
+  // Parse existing subscriptions
+  let subscriptions: EventSubscription[] = [];
+  if (existing?.attributes?.EVENT_SUBSCRIPTIONS) {
+    try {
+      subscriptions = JSON.parse(existing.attributes.EVENT_SUBSCRIPTIONS);
+    } catch {
+      subscriptions = [];
+    }
+  }
+  
+  // Check if already subscribed to this event
+  const alreadySubscribed = subscriptions.some(s => s.eventId === eventId);
+  if (alreadySubscribed) {
+    return { created: false, alreadySubscribed: true };
+  }
+  
+  // Add new subscription
+  subscriptions.push({
+    email,
+    eventId,
+    eventTitle,
+    eventDate,
+    reminderScheduledFor,
+    subscribedAt: new Date().toISOString(),
+  });
+  
+  // Create or update contact
+  const payload = {
+    email,
+    attributes: {
+      EVENT_SUBSCRIPTIONS: JSON.stringify(subscriptions),
+    },
+    updateEnabled: true, // Update if exists
+  };
+  
+  const res = await fetch(CONTACTS_API, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+      "api-key": apiKey,
+    },
+    body: JSON.stringify(payload),
+  });
+  
+  if (!res.ok && res.status !== 204) {
+    const text = await res.text().catch(() => "");
+    // 400 with "Contact already exist" is fine since we use updateEnabled
+    if (!text.includes("Contact already exist")) {
+      throw new Error(`Brevo API error: ${res.status} ${text}`);
+    }
+  }
+  
+  return { created: true, alreadySubscribed: false };
+}
+
+/**
+ * Unsubscribe a user from an event
+ */
+export async function unsubscribeFromEvent(
+  email: string,
+  eventId: string
+): Promise<{ deleted: boolean }> {
+  const apiKey = getApiKey();
+  
+  const existing = await getContact(email);
+  if (!existing?.attributes?.EVENT_SUBSCRIPTIONS) {
+    return { deleted: false };
+  }
+  
+  let subscriptions: EventSubscription[] = [];
+  try {
+    subscriptions = JSON.parse(existing.attributes.EVENT_SUBSCRIPTIONS);
+  } catch {
+    return { deleted: false };
+  }
+  
+  const before = subscriptions.length;
+  subscriptions = subscriptions.filter(s => s.eventId !== eventId);
+  
+  if (subscriptions.length === before) {
+    return { deleted: false };
+  }
+  
+  // Update contact with removed subscription
+  const res = await fetch(`${CONTACTS_API}/${encodeURIComponent(email)}`, {
+    method: "PUT",
+    headers: {
+      "Content-Type": "application/json",
+      "api-key": apiKey,
+    },
+    body: JSON.stringify({
+      attributes: {
+        EVENT_SUBSCRIPTIONS: JSON.stringify(subscriptions),
+      },
+    }),
+  });
+  
+  if (!res.ok && res.status !== 204) {
+    const text = await res.text().catch(() => "");
+    throw new Error(`Brevo API error: ${res.status} ${text}`);
+  }
+  
+  return { deleted: true };
+}
+
+/**
+ * Get a contact by email
+ */
+async function getContact(email: string): Promise<BrevoContact | null> {
+  const apiKey = getApiKey();
+  
+  const res = await fetch(`${CONTACTS_API}/${encodeURIComponent(email)}`, {
+    method: "GET",
+    headers: {
+      "api-key": apiKey,
+    },
+  });
+  
+  if (res.status === 404) {
+    return null;
+  }
+  
+  if (!res.ok) {
+    const text = await res.text().catch(() => "");
+    throw new Error(`Brevo API error: ${res.status} ${text}`);
+  }
+  
+  return res.json();
+}
+
+/**
+ * Get all subscriptions that need reminders sent
+ * Fetches all contacts and filters by reminder time
+ */
+export async function getSubscriptionsDueForReminder(
+  nowIso: string
+): Promise<EventSubscription[]> {
+  const apiKey = getApiKey();
+  const nowMs = new Date(nowIso).getTime();
+  const toleranceMs = 15 * 60 * 1000; // 15 minute window
+  
+  // Fetch contacts with EVENT_SUBSCRIPTIONS attribute
+  // Brevo limits to 50 contacts per request by default
+  let allSubscriptions: EventSubscription[] = [];
+  let offset = 0;
+  const limit = 50;
+  
+  while (true) {
+    const res = await fetch(
+      `${CONTACTS_API}?limit=${limit}&offset=${offset}&attributesSearchType=all`,
+      {
+        method: "GET",
+        headers: {
+          "api-key": apiKey,
+        },
+      }
+    );
+    
+    if (!res.ok) {
+      const text = await res.text().catch(() => "");
+      throw new Error(`Brevo API error: ${res.status} ${text}`);
+    }
+    
+    const data = await res.json();
+    const contacts = data.contacts || [];
+    
+    if (contacts.length === 0) break;
+    
+    for (const contact of contacts) {
+      if (!contact.attributes?.EVENT_SUBSCRIPTIONS) continue;
+      
+      try {
+        const subs: EventSubscription[] = JSON.parse(contact.attributes.EVENT_SUBSCRIPTIONS);
+        for (const sub of subs) {
+          // Check if reminder is due (within tolerance window)
+          if (sub.reminderScheduledFor) {
+            const reminderMs = new Date(sub.reminderScheduledFor).getTime();
+            if (nowMs >= reminderMs - toleranceMs && nowMs <= reminderMs + toleranceMs) {
+              allSubscriptions.push(sub);
+            }
+          }
+        }
+      } catch {
+        // Skip invalid JSON
+      }
+    }
+    
+    offset += contacts.length;
+    if (contacts.length < limit) break;
+  }
+  
+  return allSubscriptions;
+}
+
+/**
+ * Mark a subscription's reminder as sent by removing reminderScheduledFor
+ */
+export async function markReminderSent(
+  email: string,
+  eventId: string
+): Promise<void> {
+  const apiKey = getApiKey();
+  
+  const existing = await getContact(email);
+  if (!existing?.attributes?.EVENT_SUBSCRIPTIONS) return;
+  
+  let subscriptions: EventSubscription[] = [];
+  try {
+    subscriptions = JSON.parse(existing.attributes.EVENT_SUBSCRIPTIONS);
+  } catch {
+    return;
+  }
+  
+  // Update the subscription to mark reminder as sent
+  subscriptions = subscriptions.map(s => {
+    if (s.eventId === eventId) {
+      return { ...s, reminderScheduledFor: null };
+    }
+    return s;
+  });
+  
+  await fetch(`${CONTACTS_API}/${encodeURIComponent(email)}`, {
+    method: "PUT",
+    headers: {
+      "Content-Type": "application/json",
+      "api-key": apiKey,
+    },
+    body: JSON.stringify({
+      attributes: {
+        EVENT_SUBSCRIPTIONS: JSON.stringify(subscriptions),
+      },
+    }),
+  });
+}
diff --git a/lib/db.ts b/lib/db.ts
deleted file mode 100644
index 09f91d8..0000000
--- a/lib/db.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-import { Pool } from "pg";
-
-declare global {
-  var __pgPool: Pool | undefined;
-}
-
-function createPool() {
-  const url = process.env.DATABASE_URL;
-  if (!url) {
-    throw new Error("DATABASE_URL is not set");
-  }
-  return new Pool({ connectionString: url });
-}
-
-export const pool: Pool = global.__pgPool ?? createPool();
-if (!global.__pgPool) {
-  global.__pgPool = pool;
-}
-
-export async function query<T = any>(text: string, params?: any[]) {
-  const res = await pool.query<T>(text, params);
-  return res;
-}
diff --git a/lib/rateLimit.ts b/lib/rateLimit.ts
index a810a4a..7a29d9e 100644
--- a/lib/rateLimit.ts
+++ b/lib/rateLimit.ts
@@ -1,5 +1,3 @@
-import { getRedis } from '@/lib/redis';
-
 type Key = string;
 
 class Bucket {
@@ -11,8 +9,25 @@ class Bucket {
     this.max = max;
     this.hits = new Map();
   }
+  
+  // Clean up expired entries periodically to prevent memory leaks
+  private cleanup() {
+    const now = Date.now();
+    for (const [key, entry] of this.hits) {
+      if (now >= entry.resetAt) {
+        this.hits.delete(key);
+      }
+    }
+  }
+  
   allow(key: Key) {
     const now = Date.now();
+    
+    // Cleanup old entries every 100 requests
+    if (this.hits.size > 100) {
+      this.cleanup();
+    }
+    
     const entry = this.hits.get(key);
     if (!entry || now >= entry.resetAt) {
       this.hits.set(key, { count: 1, resetAt: now + this.windowMs });
@@ -34,39 +49,48 @@ export function getBucket(name: string, windowMs: number, max: number) {
   return buckets[k];
 }
 
-export function getClientIp(req: Request) {
-  // Next.js Request headers available in App Router
+/**
+ * Get client IP address from request headers.
+ * Handles common proxy headers used by Netlify, Vercel, Cloudflare, etc.
+ * Note: These headers can be spoofed if not behind a trusted proxy.
+ */
+export function getClientIp(req: Request): string {
   const h = req.headers;
-  return (
-    h.get('x-forwarded-for')?.split(',')[0]?.trim() ||
-    h.get('x-real-ip') ||
-    'unknown'
-  );
+  
+  // Cloudflare
+  const cfConnectingIp = h.get('cf-connecting-ip');
+  if (cfConnectingIp) return cfConnectingIp.trim();
+  
+  // Vercel / Netlify / Generic proxies
+  const xForwardedFor = h.get('x-forwarded-for');
+  if (xForwardedFor) {
+    // Take the first IP (original client), not subsequent proxies
+    const firstIp = xForwardedFor.split(',')[0]?.trim();
+    if (firstIp) return firstIp;
+  }
+  
+  // Nginx proxy
+  const xRealIp = h.get('x-real-ip');
+  if (xRealIp) return xRealIp.trim();
+  
+  // AWS ALB / API Gateway
+  const xClientIp = h.get('x-client-ip');
+  if (xClientIp) return xClientIp.trim();
+  
+  // Fallback - useful for local dev
+  return 'unknown';
 }
 
-// Unified allow() that uses Redis fixed-window if available, falls back to in-memory
-export async function allow(
+/**
+ * Rate limiting using in-memory fixed-window algorithm.
+ * Simple and works well for single-instance deployments.
+ */
+export function allow(
   scope: string,
   key: string,
   windowMs: number,
   max: number
-): Promise<{ allowed: boolean; remaining: number; retryAfterMs: number }> {
-  const redis = await getRedis();
-  if (redis) {
-    const now = Date.now();
-    const windowStart = Math.floor(now / windowMs) * windowMs;
-    const windowKey = `rl:${scope}:${key}:${windowStart}`;
-    const count = await redis.incr(windowKey);
-    if (count === 1) {
-      await redis.pExpire(windowKey, windowMs);
-    }
-    if (count > max) {
-      const ttl = await redis.pTTL(windowKey);
-      return { allowed: false, remaining: 0, retryAfterMs: ttl > 0 ? ttl : windowMs };
-    }
-    return { allowed: true, remaining: Math.max(0, max - count), retryAfterMs: 0 };
-  }
-  // Fallback in-memory bucket
+): { allowed: boolean; remaining: number; retryAfterMs: number } {
   const bucket = getBucket(scope, windowMs, max);
   return bucket.allow(key);
 }
diff --git a/lib/redis.ts b/lib/redis.ts
deleted file mode 100644
index 9fc66c0..0000000
--- a/lib/redis.ts
+++ /dev/null
@@ -1,25 +0,0 @@
-import { createClient, type RedisClientType } from 'redis';
-
-let client: RedisClientType | null = null;
-
-export async function getRedis(): Promise<RedisClientType | null> {
-  try {
-    if (client) return client;
-    const url = process.env.REDIS_URL || process.env.UPSTASH_REDIS_REST_URL || '';
-    if (!url) return null;
-    client = createClient({ url });
-    client.on('error', (err) => {
-      console.error('Redis error:', err);
-    });
-    if (!client.isOpen) await client.connect();
-    return client;
-  } catch (err) {
-    console.error('Redis connection failed:', err);
-    return null;
-  }
-}
-
-export async function closeRedis() {
-  if (client && client.isOpen) await client.quit();
-  client = null;
-}
diff --git a/lib/scheduler.ts b/lib/scheduler.ts
index 7ca980e..60094b2 100644
--- a/lib/scheduler.ts
+++ b/lib/scheduler.ts
@@ -1,79 +1,39 @@
-import { fetchEventsFromSheet } from "@/lib/parseCsv";
-import { getSubscribersForEventPendingReminder, markReminderSent } from "@/lib/subscriptions";
+import { getSubscriptionsDueForReminder, markReminderSent } from "@/lib/brevo";
 import { send24hReminder } from "@/lib/email/send";
 
-type RawEvent = Record<string, any>;
-
-function parseIsoDate(value: string | undefined | null): string | null {
-	if (!value) return null;
-	const d = new Date(value);
-	return isNaN(d.getTime()) ? null : d.toISOString();
-}
-
-function getStartTimeIso(e: RawEvent): string | null {
-	return (
-		parseIsoDate(e.date) ||
-		parseIsoDate(e.start_date) ||
-		parseIsoDate(e["start date"]) ||
-		null
-	);
-}
-
-function in24hWindow(nowMs: number, startMs: number, toleranceMs = 15 * 60 * 1000) {
-	const twentyFourHoursMs = 24 * 60 * 60 * 1000;
-	const windowStart = startMs - twentyFourHoursMs - toleranceMs;
-	const windowEnd = startMs - twentyFourHoursMs + toleranceMs;
-	return nowMs >= windowStart && nowMs <= windowEnd;
-}
-
-function makeEventId(title: string | undefined, startIso: string | null) {
-	const base = (title || "event").toString().toLowerCase().replace(/[^a-z0-9]+/g, "-").replace(/(^-|-$)/g, "");
-	return startIso ? `${base}-${startIso}` : base;
-}
-
 export async function processEventReminders(nowIso?: string) {
 	const now = nowIso ? new Date(nowIso) : new Date();
-	const nowMs = now.getTime();
-
-	// 1) Fetch raw events from CSV/sheet
-	const rows = (await fetchEventsFromSheet()) as RawEvent[];
-
-	// 2) Filter events whose 24h-before window matches current time
-	const dueEvents = rows
-		.map((e) => {
-			const startIso = getStartTimeIso(e);
-			const startMs = startIso ? new Date(startIso).getTime() : NaN;
-			const id = e.id || makeEventId(e.title || e.name, startIso);
-			return { id, title: e.title || e.name, startIso, startMs, raw: e };
-		})
-		.filter((e) => !!e.startIso && !isNaN(e.startMs))
-		.filter((e) => in24hWindow(nowMs, e.startMs));
 
 	const summary = { processedEvents: 0, processedSubs: 0, errors: [] as string[] };
 
-	// 3) For each due event, send to subscribers who have not yet been reminded
-	for (const event of dueEvents) {
-		try {
-			const subs = (await getSubscribersForEventPendingReminder(event.id)).filter((s) => !!s.reminder_scheduled_for);
-			for (const s of subs) {
-				try {
-					await send24hReminder(s.email, {
-						id: event.id,
-						title: String(event.title || "Untitled"),
-						startTime: event.startIso!,
-						link: event.raw?.link ?? null,
-						location: event.raw?.location ?? null,
-					});
-					await markReminderSent(s.id, new Date().toISOString());
-					summary.processedSubs += 1;
-				} catch (err: any) {
-					summary.errors.push(`sub ${s.id}: ${String(err)}`);
-				}
+	try {
+		// Get all subscriptions that need reminders sent (from Brevo contacts)
+		const subscriptions = await getSubscriptionsDueForReminder(now.toISOString());
+
+		// Send reminders to each subscription
+		for (const sub of subscriptions) {
+			try {
+				await send24hReminder(sub.email, {
+					id: sub.eventId,
+					title: sub.eventTitle,
+					startTime: sub.eventDate,
+					link: null,
+					location: null,
+				});
+				
+				await markReminderSent(sub.email, sub.eventId);
+				summary.processedSubs += 1;
+			} catch (err: any) {
+				summary.errors.push(`${sub.email}/${sub.eventId}: ${String(err)}`);
 			}
-			summary.processedEvents += 1;
-		} catch (err: any) {
-			summary.errors.push(`event ${event.id}: ${String(err)}`);
 		}
+
+		// Count unique events
+		const uniqueEvents = new Set(subscriptions.map(s => s.eventId));
+		summary.processedEvents = uniqueEvents.size;
+
+	} catch (err: any) {
+		summary.errors.push(`Global error: ${String(err)}`);
 	}
 
 	return summary;
diff --git a/lib/subscriptions.ts b/lib/subscriptions.ts
deleted file mode 100644
index b16707f..0000000
--- a/lib/subscriptions.ts
+++ /dev/null
@@ -1,58 +0,0 @@
-import { query } from "@/lib/db";
-
-// parameters are validated in the route handler
-// reminderAtIso: pass the 24h-before timestamp or null if not scheduling yet
-export async function subscribe(
-    email: string,
-    eventID: string,
-    reminderAtIso?: Date | null
-): Promise<{ id: number; email: string; event_id: string } | null> {
-    const sql = `
-        INSERT INTO subscriptions (email, event_id, created_at, reminder_scheduled_for)
-        VALUES ($1, $2, NOW(), $3)
-        ON CONFLICT (email, event_id)
-        DO NOTHING
-        RETURNING id, email, event_id;
-    `;
-
-    const params = [email, eventID, reminderAtIso ?? null];
-    const res = await query<{ id: number; email: string; event_id: string }>(sql, params);
-    return res.rows[0] ?? null;
-}
-
-// List subscribers for an event that have not received the 24h reminder yet
-export async function getSubscribersForEventPendingReminder(
-    eventID: string
-): Promise<{ id: number; email: string; event_id: string; reminder_scheduled_for: string | null }[]> {
-    const sql = `
-        SELECT id, email, event_id, reminder_scheduled_for
-        FROM subscriptions
-        WHERE event_id = $1
-            AND reminder_sent_at IS NULL
-            AND reminder_scheduled_for IS NOT NULL
-    `;
-    const res = await query<{ id: number; email: string; event_id: string; reminder_scheduled_for: string | null }>(sql, [eventID]);
-    return res.rows;
-}
-
-// Mark a subscription as reminded at the given timestamp (ISO)
-export async function markReminderSent(id: number, sentAtIso: string): Promise<void> {
-    const sql = `
-        UPDATE subscriptions
-        SET reminder_sent_at = $2,
-            last_notified_at = $2,
-            updated_at = NOW()
-        WHERE id = $1
-    `;
-    await query(sql, [id, sentAtIso]);
-}
-
-export async function unsubscribe(email: string, eventID: string): Promise<{ deleted: boolean }> {
-    const sql = `
-        DELETE FROM subscriptions
-        WHERE email = $1 AND event_id = $2
-    `;
-    const res = await query(sql, [email, eventID]);
-    return { deleted: (res as any).rowCount ? (res as any).rowCount > 0 : true };
-}
-
diff --git a/tests/rateLimit.test.ts b/tests/rateLimit.test.ts
index bf6c520..7a4bfb7 100644
--- a/tests/rateLimit.test.ts
+++ b/tests/rateLimit.test.ts
@@ -1,4 +1,5 @@
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { allow } from '@/lib/rateLimit';
 
 function advanceWindow(windowMs: number) {
   // Fast-forward Date.now for window rollover
@@ -6,94 +7,57 @@ function advanceWindow(windowMs: number) {
   vi.spyOn(Date, 'now').mockReturnValue(now + windowMs + 10);
 }
 
-describe('rateLimit allow() - in-memory fallback', () => {
+describe('rateLimit allow() - in-memory', () => {
   beforeEach(() => {
-    vi.resetModules();
     vi.restoreAllMocks();
-    // Mock redis module to return null so we use memory bucket
-    vi.doMock('@/lib/redis', () => ({ getRedis: vi.fn().mockResolvedValue(null) }));
   });
   afterEach(() => {
     vi.restoreAllMocks();
   });
 
-  it('allows up to max within window and then blocks', async () => {
+  it('allows up to max within window and then blocks', () => {
     const windowMs = 200;
     const max = 3;
     const scope = 'test:mem';
-    const key = 'abc';
+    const key = 'abc-' + Date.now(); // unique key per test run
 
-    const { allow } = await import('@/lib/rateLimit');
-    const r1 = await allow(scope, key, windowMs, max);
+    const r1 = allow(scope, key, windowMs, max);
     expect(r1.allowed).toBe(true);
     expect(r1.remaining).toBe(2);
 
-    const r2 = await allow(scope, key, windowMs, max);
+    const r2 = allow(scope, key, windowMs, max);
     expect(r2.allowed).toBe(true);
     expect(r2.remaining).toBe(1);
 
-    const r3 = await allow(scope, key, windowMs, max);
+    const r3 = allow(scope, key, windowMs, max);
     expect(r3.allowed).toBe(true);
     expect(r3.remaining).toBe(0);
 
-    const r4 = await allow(scope, key, windowMs, max);
+    const r4 = allow(scope, key, windowMs, max);
     expect(r4.allowed).toBe(false);
     expect(r4.remaining).toBe(0);
     expect(r4.retryAfterMs).toBeGreaterThan(0);
 
     // Advance time past window to reset
     advanceWindow(windowMs);
-    const r5 = await allow(scope, key, windowMs, max);
+    const r5 = allow(scope, key, windowMs, max);
     expect(r5.allowed).toBe(true);
     expect(r5.remaining).toBe(2);
   });
-});
-
-describe('rateLimit allow() - Redis path', () => {
-  const incr = vi.fn();
-  const pExpire = vi.fn();
-  const pTTL = vi.fn();
-  const fakeRedis: any = {
-    incr,
-    pExpire,
-    pTTL,
-  };
 
-  beforeEach(() => {
-    vi.resetModules();
-    vi.restoreAllMocks();
-    incr.mockReset();
-    pExpire.mockReset();
-    pTTL.mockReset();
-  });
+  it('uses separate buckets for different scopes', () => {
+    const windowMs = 1000;
+    const max = 1;
+    const key = 'user-' + Date.now();
 
-  it('sets expiry on first hit and blocks after max', async () => {
-    // Mock redis module to return our fake client
-    vi.doMock('@/lib/redis', () => ({ getRedis: vi.fn().mockResolvedValue(fakeRedis) }));
-
-    const windowMs = 200;
-    const max = 2;
-    const scope = 'test:redis';
-    const key = 'xyz';
-
-    // First call -> incr returns 1, set expire called
-    incr.mockResolvedValueOnce(1);
-    const { allow } = await import('@/lib/rateLimit');
-    const r1 = await allow(scope, key, windowMs, max);
+    const r1 = allow('scope-a', key, windowMs, max);
     expect(r1.allowed).toBe(true);
-    expect(pExpire).toHaveBeenCalledTimes(1);
 
-    // Second call -> incr returns 2, still allowed
-    incr.mockResolvedValueOnce(2);
-    const r2 = await allow(scope, key, windowMs, max);
+    const r2 = allow('scope-b', key, windowMs, max);
     expect(r2.allowed).toBe(true);
 
-    // Third call -> incr returns 3 (>max), should block and use TTL
-    incr.mockResolvedValueOnce(3);
-    pTTL.mockResolvedValueOnce(150);
-    const r3 = await allow(scope, key, windowMs, max);
+    // Same scope should now be blocked
+    const r3 = allow('scope-a', key, windowMs, max);
     expect(r3.allowed).toBe(false);
-    expect(r3.remaining).toBe(0);
-    expect(r3.retryAfterMs).toBeGreaterThan(0);
   });
 });
diff --git a/tests/scheduler.test.ts b/tests/scheduler.test.ts
index 874ce64..0011e73 100644
--- a/tests/scheduler.test.ts
+++ b/tests/scheduler.test.ts
@@ -1,27 +1,33 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest';
 
-vi.mock('@/lib/parseCsv', () => ({
-  fetchEventsFromSheet: vi.fn(async () => [
-    { title: 'Due Soon', date: '2026-03-15T04:00:00.000Z' },
-  ]),
-}));
-
-const mockGetSubs = vi.fn(async () => [
-  { id: 1, email: 'a@example.com', event_id: 'due-soon-2026-03-15T04:00:00.000Z', reminder_scheduled_for: '2026-03-14T04:00:00.000Z' },
-  { id: 2, email: 'b@example.com', event_id: 'due-soon-2026-03-15T04:00:00.000Z', reminder_scheduled_for: null }, // should be excluded
+const mockGetSubscriptionsDueForReminder = vi.fn(async () => [
+  { 
+    email: 'a@example.com', 
+    eventId: 'due-soon-2026-03-15T04:00:00.000Z', 
+    eventTitle: 'Due Soon',
+    eventDate: '2026-03-15T04:00:00.000Z',
+    reminderScheduledFor: '2026-03-14T04:00:00.000Z',
+    subscribedAt: '2026-03-01T00:00:00.000Z'
+  },
 ]);
-vi.mock('@/lib/subscriptions', () => ({
-  getSubscribersForEventPendingReminder: mockGetSubs as any,
-  markReminderSent: vi.fn(async () => {}),
+const mockMarkReminderSent = vi.fn(async () => {});
+
+vi.mock('@/lib/brevo', () => ({
+  getSubscriptionsDueForReminder: mockGetSubscriptionsDueForReminder as any,
+  markReminderSent: mockMarkReminderSent as any,
 }));
 
+const mockSend24hReminder = vi.fn(async () => {});
 vi.mock('@/lib/email/send', () => ({
-  send24hReminder: vi.fn(async () => {}),
+  send24hReminder: mockSend24hReminder as any,
 }));
 
 describe('processEventReminders', () => {
   beforeEach(() => {
     vi.useRealTimers();
+    mockGetSubscriptionsDueForReminder.mockClear();
+    mockMarkReminderSent.mockClear();
+    mockSend24hReminder.mockClear();
   });
 
   it('processes due events and marks reminders sent', async () => {
@@ -33,9 +39,7 @@ describe('processEventReminders', () => {
     expect(summary.processedEvents).toBe(1);
     expect(summary.processedSubs).toBe(1);
 
-    const { send24hReminder } = await import('@/lib/email/send');
-    const { markReminderSent } = await import('@/lib/subscriptions');
-    expect((send24hReminder as any).mock.calls.length).toBe(1);
-    expect((markReminderSent as any).mock.calls.length).toBe(1);
+    expect(mockSend24hReminder.mock.calls.length).toBe(1);
+    expect(mockMarkReminderSent.mock.calls.length).toBe(1);
   });
 });
diff --git a/tests/subscriptions.route.test.ts b/tests/subscriptions.route.test.ts
index a4e40c8..0e547ea 100644
--- a/tests/subscriptions.route.test.ts
+++ b/tests/subscriptions.route.test.ts
@@ -7,11 +7,13 @@ vi.mock('@/lib/parseCsv', () => ({
   ]),
 }));
 
-const mockSubscribe = vi.fn(async () => ({ id: 1, email: 'you@example.com', event_id: 'future-event-...' }));
-vi.mock('@/lib/subscriptions', async (importOriginal) => {
+const mockSubscribeToEvent = vi.fn(async () => ({ created: true, alreadySubscribed: false }));
+const mockUnsubscribeFromEvent = vi.fn(async () => ({ deleted: true }));
+vi.mock('@/lib/brevo', async (importOriginal) => {
   const actual = await (importOriginal as any)();
   return Object.assign({}, actual, {
-    subscribe: mockSubscribe as any,
+    subscribeToEvent: mockSubscribeToEvent as any,
+    unsubscribeFromEvent: mockUnsubscribeFromEvent as any,
   });
 });
 
@@ -22,8 +24,10 @@ vi.mock('@/lib/email/send', () => ({
 
 describe('POST /api/subscriptions route', () => {
   beforeEach(() => {
-    mockSubscribe.mockClear();
+    mockSubscribeToEvent.mockClear();
+    mockUnsubscribeFromEvent.mockClear();
     mockSendImmediate.mockClear();
+    mockSubscribeToEvent.mockResolvedValue({ created: true, alreadySubscribed: false });
   });
 
   it('schedules a reminder 24h before for far-future event', async () => {
@@ -36,10 +40,10 @@ describe('POST /api/subscriptions route', () => {
     const res = await POST(req);
     expect(res.status).toBe(200);
     expect(mockSendImmediate).toHaveBeenCalledTimes(1);
-    // third arg should be a Date when >24h away
-    const call = mockSubscribe.mock.calls[0] as any[];
-    const reminderAt = call[2] as any;
-    expect(reminderAt !== null).toBe(true);
+    // Check that subscribeToEvent was called with a reminder ISO string (not null)
+    const call = mockSubscribeToEvent.mock.calls[0] as any[];
+    const reminderIso = call[4]; // 5th argument is reminderScheduledFor
+    expect(reminderIso !== null).toBe(true);
   });
 
   it('does not schedule when within 24h (null reminder date)', async () => {
@@ -51,13 +55,13 @@ describe('POST /api/subscriptions route', () => {
     });
     const res = await POST(req);
     expect(res.status).toBe(200);
-    const call = mockSubscribe.mock.calls[0] as any[];
-    const reminderAt = call[2];
-    expect(reminderAt).toBeNull();
+    const call = mockSubscribeToEvent.mock.calls[0] as any[];
+    const reminderIso = call[4]; // 5th argument is reminderScheduledFor
+    expect(reminderIso).toBeNull();
   });
 
   it('skips confirmation on duplicate subscription (no resend)', async () => {
-    mockSubscribe.mockResolvedValueOnce(null);
+    mockSubscribeToEvent.mockResolvedValueOnce({ created: false, alreadySubscribed: true });
     const { POST } = await import('@/app/api/subscriptions/route');
     const req = new Request('http://localhost/api/subscriptions', {
       method: 'POST',
@@ -100,8 +104,7 @@ describe('POST /api/subscriptions route', () => {
   });
 
   it('DELETE unsubscribes an existing subscription', async () => {
-    const { unsubscribe } = await import('@/lib/subscriptions');
-    const unsubSpy = vi.spyOn(await import('@/lib/subscriptions'), 'unsubscribe').mockResolvedValueOnce({ deleted: true });
+    mockUnsubscribeFromEvent.mockResolvedValueOnce({ deleted: true });
 
     const { DELETE } = await import('@/app/api/subscriptions/route');
     const req = new Request('http://localhost/api/subscriptions', {
@@ -111,11 +114,10 @@ describe('POST /api/subscriptions route', () => {
     });
     const res = await DELETE(req);
     expect(res.status).toBe(200);
-    unsubSpy.mockRestore();
   });
 
   it('DELETE gracefully returns 200 when no subscription exists', async () => {
-    const unsubSpy = vi.spyOn(await import('@/lib/subscriptions'), 'unsubscribe').mockResolvedValueOnce({ deleted: false });
+    mockUnsubscribeFromEvent.mockResolvedValueOnce({ deleted: false });
 
     const { DELETE } = await import('@/app/api/subscriptions/route');
     const req = new Request('http://localhost/api/subscriptions', {
@@ -125,6 +127,5 @@ describe('POST /api/subscriptions route', () => {
     });
     const res = await DELETE(req);
     expect(res.status).toBe(200);
-    unsubSpy.mockRestore();
   });
 });