landing

src/servers/api/waitlist/waitlist.ts

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+import { join } from 'node:path';
+import { existsSync, readFileSync, appendFileSync, mkdirSync } from 'node:fs';
+import { createRouter } from '../../create-router';
+import { DATA_PATH } from '../../data-path';
+
+export const waitlistRouter = createRouter();
+
+const WAITLIST_FILE = join(DATA_PATH, 'waitlist.txt');
+
+waitlistRouter.post('/', async (ctx) => {
+  const body = await ctx.req.json<{ email?: string }>();
+  const email = body.email?.trim().toLowerCase();
+
+  if (!email || !email.includes('@')) {
+    return ctx.json({ error: 'Invalid email' }, 400);
+  }
+
+  const dir = DATA_PATH;
+  if (!existsSync(dir)) {
+    mkdirSync(dir, { recursive: true });
+  }
+
+  if (existsSync(WAITLIST_FILE)) {
+    const existing = readFileSync(WAITLIST_FILE, 'utf-8');
+    const emails = existing.split('\n').map((l) => l.trim().toLowerCase());
+    if (emails.includes(email)) {
+      return ctx.json({ ok: true });
+    }
+  }
+
+  appendFileSync(WAITLIST_FILE, email + '\n', 'utf-8');
+  return ctx.json({ ok: true });
+});