import * as jwt from 'jsonwebtoken';
import UnprocessableEntityException from '../exceptions/UnprocessableEntityException';
import { Request } from 'express';
import { validationResult } from 'express-validator';
/**
 * Decodes a token from Authorization Header
 *
 * @returns [[UserInterface]]
 * @param jwtToken A authorization header
 */
export const decodeToken = <T>(jwtToken: string): T => {
  return jwt.decode(jwtToken.replace('Bearer ', ''));
};
/**
 * Validates a request using express-validator
 * The valiation will be made against the inversify-express-utils decorator
 * If request has errors, it will throw a UnprocessableEntityException error
 */
export const validateRequest = (req: Request): void => {
  const errors = validationResult(req);
  if (!errors.isEmpty()) {
    throw new UnprocessableEntityException(errors.array());
  }
  return;
};