nodejs/src/utils/errors.ts

/**
 * Custom application exceptions.
 * @module errors
 */

export class AppError extends Error {
  public readonly statusCode: number;
  public readonly isOperational: boolean;

  constructor(
    message: string,
    statusCode: number = 500,
    isOperational: boolean = true
  ) {
    super(message);
    this.statusCode = statusCode;
    this.isOperational = isOperational;
    Error.captureStackTrace(this, this.constructor);
  }
}

export class ValidationError extends AppError {
  constructor(message: string) {
    super(message, 400);
  }
}

export class NotFoundError extends AppError {
  constructor(resource: string) {
    super(`${resource} not found`, 404);
  }
}

export class AuthenticationError extends AppError {
  constructor(message: string = 'Authentication failed') {
    super(message, 401);
  }
}