text: const Joi = require('joi');
  
  module.exports = {
    register (req, res, next) {
      const schema = {
        email: Joi.string().email(),
        password: Joi.string().regex(
          new RegExp('^[a-zA-Z0-9]{8,32}$')
        )
      }
  
      const { error, value } = Joi.validate(req.body, schema);
  
      if (error) {
        switch (error.details[0].context.key) {
          case 'email':
            res.status(400).send({
              error: 'You must provide a valid email address'
            });
            break; 
          case 'password':
            res.status(400).send({
              error: `The password provided failed to match the following rules
                <br>
                1. It must contain ONLY the following characters: lower case, upepr case, numeric
                <br>
                2. It must be at least 8 characters in length and not greater than 32 characters.
              `
            })
            break;
          default:
            res.status(400).send({
              error: 'Invalid registration information'
            });
        }
      } else {
        next();
      }
    }
  }