feat: reminder email opt-in 1 hour before registration opens

apps/web/src/routes/api/cron/reminders.ts

@@ -0,0 +1,40 @@
+import { runSendReminders } from "@kk/api/routers/index";
+import { env } from "@kk/env/server";
+import { createFileRoute } from "@tanstack/react-router";
+
+async function handleCronReminders({ request }: { request: Request }) {
+	const secret = env.CRON_SECRET;
+	if (!secret) {
+		return new Response("CRON_SECRET not configured", { status: 500 });
+	}
+
+	// Accept the secret via Authorization header (Bearer) or JSON body
+	const authHeader = request.headers.get("Authorization");
+	let providedSecret: string | null = null;
+
+	if (authHeader?.startsWith("Bearer ")) {
+		providedSecret = authHeader.slice(7);
+	} else {
+		try {
+			const body = await request.json();
+			providedSecret = (body as { secret?: string }).secret ?? null;
+		} catch {
+			// ignore parse errors
+		}
+	}
+
+	if (!providedSecret || providedSecret !== secret) {
+		return new Response("Unauthorized", { status: 401 });
+	}
+
+	const result = await runSendReminders();
+	return Response.json(result);
+}
+
+export const Route = createFileRoute("/api/cron/reminders")({
+	server: {
+		handlers: {
+			POST: handleCronReminders,
+		},
+	},
+});