text: /**
   * errnotfound:
   *
   * Examples:
   *
   *     app.use(middleware.errnotfound({ view: '404', error: 'Not found' }))
   *
   * Options:
   *
   *   - view     view
   *   - error    error message
   *
   * @param {Object} options
   * @return {Function}
   * @api public
   */
  
  const errnotfound = (options) => {
      options = options || {};
  
      let view = options.view || '404',
          error = options.error || '';
  
      return (req, res, next) => {
          res.status(404);
  
          // respond with html page
          if (req.accepts('html')) {
              res.render(view, { url: req.url });
              return;
          }
  
          // respond with json
          if (req.accepts('json')) {
              res.send({ error: error });
              return;
          }
  
          // default to plain-text. send()
          res.type('txt').send(error);
      };
  };
  
  module.exports = errnotfound;
  