Exam generation rework, batch user tables, fastapi endpoint switch

src/pages/api/users/controller.ts

@@ -0,0 +1,47 @@
+
+import { sessionOptions } from '@/lib/session';
+import { withIronSessionApiRoute } from 'iron-session/next';
+import type { NextApiRequest, NextApiResponse } from 'next'
+import client from "@/lib/mongodb";
+
+const db = client.db(process.env.MONGODB_DB);
+
+export default withIronSessionApiRoute(handler, sessionOptions);
+
+async function handler(req: NextApiRequest, res: NextApiResponse) {
+  const { op } = req.query
+
+  if (req.method === 'GET') {
+    switch (op) {
+      default:
+        res.status(400).json({ error: 'Invalid operation!' })
+    }
+  }
+  else if (req.method === 'POST') {
+    switch (op) {
+        case 'crossRefEmails':
+          res.status(200).json(await crossRefEmails(req.body.emails))
+          break;
+        default:
+          res.status(400).json({ error: 'Invalid operation!' })
+    }
+  } else {
+    res.status(400).end(`Method ${req.method} Not Allowed`)
+  }
+}
+
+async function crossRefEmails(emails: string[]) {
+  return await db.collection("users").aggregate([
+    {
+      $match: {
+        email: { $in: emails }
+      }
+    },
+    {
+      $project: {
+        _id: 0,
+        email: 1
+      }
+    }
+  ]).toArray();
+}