link-stack/apps/metamigo-frontend/pages/api/auth/[...nextauth].ts

import { NextApiRequest, NextApiResponse } from "next";
import NextAuth from "next-auth";
import Google from "next-auth/providers/google";
import GitHub from "next-auth/providers/github";
import GitLab from "next-auth/providers/gitlab";
import Cognito from "next-auth/providers/cognito";
import { loadConfig, IAppConfig } from "@digiresilience/metamigo-config";
import { MetamigoAdapter } from "../../../lib/nextauth-adapter";
import { CloudflareAccessProvider } from "../../../lib/cloudflare";

const nextAuthOptions = (config: IAppConfig, req: NextApiRequest) => {
  const { nextAuth, cfaccess } = config;
  const adapter = MetamigoAdapter(config);
  const providers = [];

  const { audience, domain } = cfaccess;
  const cloudflareAccessEnabled = audience && domain;
  if (cloudflareAccessEnabled)
    providers.push(CloudflareAccessProvider(audience, domain, adapter, req));
  else {
    if (nextAuth.google?.id)
      providers.push(
        Google({
          clientId: nextAuth.google.id,
          clientSecret: nextAuth.google.secret,
        })
      );

    if (nextAuth.github?.id)
      providers.push(
        GitHub({
          clientId: nextAuth.github.id,
          clientSecret: nextAuth.github.secret,
        })
      );

    if (nextAuth.gitlab?.id)
      providers.push(
        GitLab({
          clientId: nextAuth.gitlab.id,
          clientSecret: nextAuth.gitlab.secret,
        })
      );

    if (nextAuth.cognito?.id)
      providers.push(
        Cognito({
          clientId: nextAuth.cognito.id,
          clientSecret: nextAuth.cognito.secret,
          // domain: nextAuth.cognito.domain,
        })
      );
  }

  if (providers.length === 0)
    throw new Error(
      "No next-auth providers configured. See Metamigo configuration docs."
    );

  return {
    secret: nextAuth.secret,
    session: {
      jwt: true,
      maxAge: 8 * 60 * 60, // 8 hours
    },
    jwt: {
      secret: nextAuth.secret,
      encryption: false,
      signingKey: nextAuth.signingKey,
      encryptionKey: nextAuth.encryptionKey,
    },
    providers,
    adapter,
    callbacks: {
      async session(session: any, token: any) {
        // make the user id available in the react client
        session.user.id = token.userId;
        return session;
      },
      async jwt(token: any, user: any) {
        const isSignIn = Boolean(user);
        // Add auth_time to token on signin in
        if (isSignIn) {
          // not sure what this does
          // if (!token.aud) token.aud;

          token.aud = nextAuth.audience;
          token.picture = user.avatar;
          token.userId = user.id;
          token.role = user.userRole ? `app_${user.userRole}` : "app_anonymous";
        }

        return token;
      },
    },
  };
};

const nextAuth = async (
  req: NextApiRequest,
  res: NextApiResponse
): Promise<void> =>
  // @ts-expect-error: Type mismatch
  NextAuth(req, res, nextAuthOptions(await loadConfig(), req));

export default nextAuth;