feat: schedule automatic form closure

app/actions/submissions.ts

@@ -14,6 +14,7 @@ import {
   type StoredAnswerSnapshot,
 } from "@/lib/submission-intake";
 import { submissionWebhookMessage } from "@/lib/submission-webhook";
+import { isFormAcceptingSubmissions } from "@/lib/form-availability";
 
 function getSubmissionResultLink(formId: string, submissionId: string) {
   const baseUrl = process.env.BASE_URL || process.env.NEXTAUTH_URL;
@@ -32,7 +33,9 @@ export async function submitForm(
   const discordId = await requireDiscordId();
   const userName = session.user.name ?? null;
   const form = await requireFormAccess(formId, discordId);
-  if (!form.isOpen) throw new Error("This form is disabled for now");
+  if (!isFormAcceptingSubmissions(form)) {
+    throw new Error("This form is closed for submissions");
+  }
 
   const questionsList = await db.query.questions.findMany({
     where: (question, { eq }) => eq(question.formId, formId),