import { GraphQLError } from 'graphql';

export default class ValidationError extends GraphQLError {
  public readonly state: any;
  public readonly code: number = 400;

  constructor(errors: any[]) {
    super('The request is invalid.');
    this.state = errors.reduce((result, error) => {
      if (Object.prototype.hasOwnProperty.call(result, error.key)) {
        result[error.key].push(error.message);
      } else {
        result[error.key] = [error.message];
      }
      return result;
    },                         {});
  }
}