auth.middleware.ts

import { Handler, Request } from 'express';
import { CognitoIdentityServiceProvider } from 'aws-sdk';

const identityServiceProvider = new CognitoIdentityServiceProvider({
  region: process.env.REGION || 'ap-northeast-1',
});

export interface IUser {
  id: string;
  email: string;
}

export interface IAuthenticatedRequest extends Request {
  user?: IUser;
}

const authMiddleware: Handler = async (req: IAuthenticatedRequest, res, next) => {
  try {
    const token = req.headers['authorization']!;
    const rawUser = await identityServiceProvider.getUser({ AccessToken: token }).promise();
    req.user = {
      id: rawUser.UserAttributes.find((attr) => attr.Name === 'sub')?.Value!,
      email: rawUser.UserAttributes.find((attr) => attr.Name === 'email')?.Value!,
    };
    next();
  } catch (err) {
    next(err);
  }
};

export default authMiddleware;