Custom API Errors

errors.js

'use strict'

const httpStatus = require("http-status");


/**
 * Extends the node base Error object to have status while capturing the stack trace
 */
class ApiError extends Error {
  constructor(statusCode = 500, message = httpStatus[statusCode]) {
    super(message);
    this.name = this.constructor.name;
    Error.captureStackTrace(this, this.constructor);
    this.status = statusCode;
  }
};

/**
 * 400 BAD REQUEST
 * The server cannot or will not process the request due to
 * something that is perceived to be a client error
 */
const BadRequestError = message => new ApiError(400)

/**
 * 401 UNAUTHORIZED
 * The request has not been applied because it lacks valid authentication
 * credentials for the target resource.
 */
const UnauthorizedError = message => new ApiError(401)

/**
 * 403 FORBIDDEN
 * The server understood the request but refuses to authorize it.
 */
const ForbiddenError = message => new ApiError(403)

/**
 * 404 NOT_FOUND
 * The server understood the request but refuses to authorize it.
 */
const NotFoundError = message => ApiError(404)

/**
 * 500 INTERNAL SERVER ERROR
 * The server encountered an unexpected condition that prevented
 * it from fulfilling the request.
 */
const InternalServerError = message => ApiError(500)

/**
 * 503 SERVICE UNAVAILABLE
 * The server is currently unable to handle the request due to a temporary problem
 */
const ServiceUnavailableError = message => ApiError(503)

module.exports = {
  BadRequestError,
  UnauthorizedError,
  ForbiddenError,
  NotFoundError,
  InternalServerError,
  ServiceUnavailableError
};