Small promises wrappers

express-tools.js

const httpError = require('http-errors')

exports.wrap = (f, status = 200) => (req, res, next) => {
  Promise.resolve(req).then(f).then(r => {
    if (status === 204) res.status(204).end()
    else res.status(status).json(r)
  }).catch(next)
}

exports.httpError = httpError

exports.hError = (status, msg, props) => Promise.reject(httpError(status, msg, props))