express middleware that throws if the specified request parameters are missing

requireParams.js

import {difference} from 'lodash';

export function BadRequestError(message) {
    this.name = 'BadRequestError';
    this.statusCode = 400;
    this.message = 'Bad request. ' + message;
}
BadRequestError.prototype = Object.create(Error.prototype);
BadRequestError.prototype.constructor = BadRequestError;

const requireParams = (...requiredParams) => (req, res, next) => {
    const missingParams = difference(requiredParams, Object.keys(req.query));
    next(missingParams.length ? new BadRequestError('Missing parameters: ' + missingParams) : null);
};
export default requireParams;