Async promises within sync code hack with promisizer

promisize.coffee

Q = require 'q'



promisize = (fn, args... ) ->

	promises = []

	getpromises = ( p ) ->
		promises.push( p )
		null

	giveresults = () ->
		promises.shift()


	len = args.length
	args[len] = getpromises

	try # this could be iterated serval times to resolve any type errors
		fn.apply(null,args)

	# console.log promises.length

	Q.all( promises )
	.then ->
		args[len] = giveresults
		fn.apply(null,args)



#
# example...
#

promiseB = -> # gives a promise
	Q.fcall () ->
		return 2

# sync function with promise inside
# prep sync fuction by adding promise arg and calling all promises with it
# it's probably best if this sync function doesn't have serious side-effects
syncfunc = (c, promise) -> 

	a = 1
	b = promise( promiseB() ) # promise here

	return a + b + c


# promisize sync function f
promisize( syncfunc, 3 )
.then (res) ->
	console.log res # 6