Created a route for the Stripe webhook

src/pages/api/register.ts

@@ -37,7 +37,7 @@ async function login(req: NextApiRequest, res: NextApiResponse) {
 		return;
 	}
 
-	const codeData = codeDocs[0].data() as {code: string; type: Type; creator: string; expiryDate: Date | null};
+	const codeData = codeDocs[0].data() as {code: string; type: Type; creator?: string; expiryDate: Date | null};
 
 	createUserWithEmailAndPassword(auth, email, password)
 		.then(async (userCredentials) => {
@@ -57,7 +57,7 @@ async function login(req: NextApiRequest, res: NextApiResponse) {
 
 			await setDoc(doc(db, "users", userId), user);
 			await setDoc(codeDocs[0].ref, {userId: userId}, {merge: true});
-			await addUserToGroupOnCreation(userId, codeData.type, codeData.creator);
+			if (codeData.creator) await addUserToGroupOnCreation(userId, codeData.type, codeData.creator);
 
 			req.session.user = {...user, id: userId};
 			await req.session.save();

src/pages/api/stripe.ts

@@ -0,0 +1,43 @@
+// Next.js API route support: https://nextjs.org/docs/api-routes/introduction
+import type {NextApiRequest, NextApiResponse} from "next";
+import {app} from "@/firebase";
+import {getFirestore, setDoc, doc} from "firebase/firestore";
+import {withIronSessionApiRoute} from "iron-session/next";
+import {sessionOptions} from "@/lib/session";
+import {Type} from "@/interfaces/user";
+import {PERMISSIONS} from "@/constants/userPermissions";
+import {uuidv4} from "@firebase/util";
+import {prepareMailer, prepareMailOptions} from "@/email";
+import * as Stripe from "stripe";
+import ShortUniqueId from "short-unique-id";
+
+const db = getFirestore(app);
+
+export default async function handler(req: NextApiRequest, res: NextApiResponse) {
+	const {email, expiryDate, key} = req.body as {email: string; expiryDate: Date; key: string};
+	if (!key || key !== process.env.STRIPE_KEY) {
+		res.status(403).json({ok: false});
+		return;
+	}
+
+	const uid = new ShortUniqueId();
+	const code = uid.randomUUID(6);
+
+	const codeRef = doc(db, "codes", code);
+	await setDoc(codeRef, {type: "student", code, expiryDate});
+
+	const transport = prepareMailer();
+	const mailOptions = prepareMailOptions(
+		{
+			type: "student",
+			code,
+		},
+		[email],
+		"EnCoach Registration",
+		"main",
+	);
+
+	await transport.sendMail(mailOptions);
+
+	res.status(200).json({ok: true});
+}