Initial commit

lib/auth.ts

@@ -0,0 +1,72 @@
+import { PrismaAdapter } from "@auth/prisma-adapter";
+import { compare } from "bcryptjs";
+import { getServerSession, type NextAuthOptions } from "next-auth";
+import CredentialsProvider from "next-auth/providers/credentials";
+import { db } from "@/lib/db";
+import { loginSchema } from "@/lib/validators/auth";
+
+export const authOptions: NextAuthOptions = {
+  adapter: PrismaAdapter(db),
+  secret:
+    process.env.NEXTAUTH_SECRET ??
+    (process.env.NODE_ENV === "development" ? "payme-dev-only-secret-change-in-production" : undefined),
+  session: {
+    // Credentials auth in NextAuth v4 requires JWT strategy.
+    strategy: "jwt"
+  },
+  pages: {
+    signIn: "/login"
+  },
+  providers: [
+    CredentialsProvider({
+      name: "Credentials",
+      credentials: {
+        email: { label: "Email", type: "email" },
+        password: { label: "Password", type: "password" }
+      },
+      authorize: async (credentials) => {
+        // Apply credential attempt throttling in front of this endpoint for production deployments.
+        const parsed = loginSchema.safeParse(credentials);
+        if (!parsed.success) {
+          return null;
+        }
+
+        const user = await db.user.findUnique({
+          where: { email: parsed.data.email }
+        });
+
+        if (!user) {
+          return null;
+        }
+
+        const validPassword = await compare(parsed.data.password, user.hashedPassword);
+        if (!validPassword) {
+          return null;
+        }
+
+        return {
+          id: user.id,
+          email: user.email
+        };
+      }
+    })
+  ],
+  callbacks: {
+    jwt: ({ token, user }) => {
+      if (user) {
+        token.id = user.id;
+      }
+      return token;
+    },
+    session: ({ session, token }) => {
+      if (session.user) {
+        session.user.id = String(token.id ?? token.sub ?? "");
+      }
+      return session;
+    }
+  }
+};
+
+export function auth() {
+  return getServerSession(authOptions);
+}