'use strict';

/**
 * Application-level error.
 * status  — HTTP status code
 * code    — machine-readable error code
 * message — human-readable message
 * extra   — optional additional fields merged into the response body
 */
class AppError extends Error {
  constructor(status, code, message, extra = null) {
    super(message);
    this.name = 'AppError';
    this.status = status;
    this.code = code;
    this.isAppError = true;
    this.extra = extra;
  }
}

module.exports = { AppError };