Created a discount system related to the user's e-mail address and applied to the packages

src/pages/api/discounts/index.ts

@@ -0,0 +1,81 @@
+// 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,
+  setDoc,
+  doc,
+  getDoc,
+  deleteDoc,
+} from "firebase/firestore";
+import { withIronSessionApiRoute } from "iron-session/next";
+import { sessionOptions } from "@/lib/session";
+import { Group } from "@/interfaces/user";
+import { Discount, Package } from "@/interfaces/paypal";
+import { v4 } from "uuid";
+
+const db = getFirestore(app);
+
+export default withIronSessionApiRoute(handler, sessionOptions);
+
+async function handler(req: NextApiRequest, res: NextApiResponse) {
+  if (req.method === "GET") await get(req, res);
+  if (req.method === "POST") await post(req, res);
+  if (req.method === "DELETE") return del(req, res);
+}
+
+async function get(req: NextApiRequest, res: NextApiResponse) {
+  if (!req.session.user) {
+    res.status(401).json({ ok: false });
+    return;
+  }
+
+  const snapshot = await getDocs(collection(db, "discounts"));
+
+  res.status(200).json(
+    snapshot.docs.map((doc) => ({
+      id: doc.id,
+      ...doc.data(),
+    })),
+  );
+}
+
+async function post(req: NextApiRequest, res: NextApiResponse) {
+  if (!req.session.user) {
+    res.status(401).json({ ok: false });
+    return;
+  }
+
+  if (!["developer", "admin"].includes(req.session.user!.type))
+    return res.status(403).json({
+      ok: false,
+      reason: "You do not have permission to create a new discount",
+    });
+
+  const body = req.body as Discount;
+
+  await setDoc(doc(db, "discounts", v4()), body);
+  res.status(200).json({ ok: true });
+}
+
+async function del(req: NextApiRequest, res: NextApiResponse) {
+  if (!req.session.user) {
+    res
+      .status(401)
+      .json({ ok: false, reason: "You must be logged in to generate a code!" });
+    return;
+  }
+
+  const discounts = req.query.discount as string[];
+
+  for (const discount of discounts) {
+    const snapshot = await getDoc(doc(db, "discounts", discount as string));
+    if (!snapshot.exists()) continue;
+
+    await deleteDoc(snapshot.ref);
+  }
+
+  res.status(200).json({ discounts });
+}