Promise proxy

promiseme.js

let handlers = {}

handlers.get = function(target, property) {
	let v = target[property]
	if (typeof(v) == "function") {
		return async (...args) => {
			return new Promise((resolve, reject) => {
				target[property](...args, (err, ...rest) => {
					if (err) reject(err)
					else resolve(rest.length == 1 ? rest[0] : rest)
				})
			})
		}
	} else {
		return v
	}
}

module.exports = function (obj) {
	return new Proxy(obj, handlers)
}

useme.js

let proxy = require('./promiseme')

let d = {}
d.x = 1
d.f = function (a, cb) {
	let self = this;
	setTimeout(function () { cb(null, self, a) }, 1000)
}

proxy(d).f("HELLO").then((x)=>{console.log(x)})