diet-connect/index.js

Compatibility layer for using Connect/Express middleware in diet.js apps

/*
 * @param {function} middleware - connect style, (req, res, next)
 * @return {function} middleware - dietjs style ($)
 * Proxies the signal object
 */
function compatible (middleware) {
	return function ($) {
		var req = $.request
		var res = $.response

		var $req = new Proxy(req, {
			defineProperty (target, prop, descriptor) {
				return Object.defineProperty(target, prop, descriptor) &&
					   Object.defineProperty($, prop, descriptor)
			},
			has (target, prop) {
				return prop in target || prop in $
			},
			get (target, prop) {
				return prop in target ? target[prop] : $[prop]
			},
			set (target, prop, value, receiver) {
				$[prop] = value
				target[prop] = value
				return true
			},
			deleteProperty (target, prop) {
				return (delete $[prop]) && (delete target[prop])
			}
		})

		middleware($req, res, function (err) {
			if (err)
				throw err
			$.return()
		})
	}
}

module.exports = compatible