improvements

pages/api/departures.ts

@@ -0,0 +1,22 @@
+import type { NextApiRequest, NextApiResponse } from 'next';
+import { createRideBusClient, parseRequest, RideBusError } from '@/lib/ridebus';
+
+const ridebus = createRideBusClient();
+
+export default async function departures(
+  req: NextApiRequest,
+  res: NextApiResponse
+) {
+  res.setHeader('Cache-Control', 'no-store');
+  if (req.method !== 'GET') {
+    res.setHeader('Allow', 'GET');
+    return res.status(405).json({ error: 'method_not_allowed' });
+  }
+  try {
+    return res.status(200).json(await ridebus.get(parseRequest(req.query)));
+  } catch (error) {
+    const status = error instanceof RideBusError ? error.status : 502;
+    // Never forward upstream responses or configuration details to the browser.
+    return res.status(status).json({ error: 'departures_unavailable' });
+  }
+}