/api/groups and /api/invites refactored, fixed some inserts/updates in which I didn't include the id

src/pages/api/groups/[id].ts

@@ -1,21 +1,12 @@
 // Next.js API route support: https://nextjs.org/docs/api-routes/introduction
 import type { NextApiRequest, NextApiResponse } from "next";
-import { app } from "@/firebase";
-import {
-  getFirestore,
-  collection,
-  getDocs,
-  getDoc,
-  doc,
-  deleteDoc,
-  setDoc,
-} from "firebase/firestore";
+import client from "@/lib/mongodb";
 import { withIronSessionApiRoute } from "iron-session/next";
 import { sessionOptions } from "@/lib/session";
 import { Group } from "@/interfaces/user";
 import { updateExpiryDateOnGroup } from "@/utils/groups.be";
 
-const db = getFirestore(app);
+const db = client.db(process.env.MONGODB_DB);
 
 export default withIronSessionApiRoute(handler, sessionOptions);
 
@@ -35,10 +26,10 @@ async function get(req: NextApiRequest, res: NextApiResponse) {
 
   const { id } = req.query as { id: string };
 
-  const snapshot = await getDoc(doc(db, "groups", id));
+  const snapshot = await db.collection("groups").findOne({ id: id});
 
-  if (snapshot.exists()) {
-    res.status(200).json({ ...snapshot.data(), id: snapshot.id });
+  if (snapshot) {
+    res.status(200).json({ ...snapshot });
   } else {
     res.status(404).json(undefined);
   }
@@ -51,9 +42,12 @@ async function del(req: NextApiRequest, res: NextApiResponse) {
   }
 
   const { id } = req.query as { id: string };
+  const group = await db.collection("groups").findOne<Group>({id: id});
 
-  const snapshot = await getDoc(doc(db, "groups", id));
-  const group = { ...snapshot.data(), id: snapshot.id } as Group;
+  if (!group) {
+    res.status(404);
+    return;
+  }
 
   const user = req.session.user;
   if (
@@ -61,7 +55,7 @@ async function del(req: NextApiRequest, res: NextApiResponse) {
     user.type === "developer" ||
     user.id === group.admin
   ) {
-    await deleteDoc(snapshot.ref);
+    await db.collection("groups").deleteOne({ id: id });
 
     res.status(200).json({ ok: true });
     return;
@@ -78,8 +72,11 @@ async function patch(req: NextApiRequest, res: NextApiResponse) {
 
   const { id } = req.query as { id: string };
 
-  const snapshot = await getDoc(doc(db, "groups", id));
-  const group = { ...snapshot.data(), id: snapshot.id } as Group;
+  const group = await db.collection("groups").findOne<Group>({id: id});
+  if (!group) {
+    res.status(404);
+    return;
+  }
 
   const user = req.session.user;
   if (
@@ -98,7 +95,10 @@ async function patch(req: NextApiRequest, res: NextApiResponse) {
       );
     }
 
-    await setDoc(snapshot.ref, req.body, { merge: true });
+    await db.collection("grading").updateOne(
+      { id: req.session.user.id },
+      { $set: req.body}
+    );
 
     res.status(200).json({ ok: true });
     return;