Aspected DFD - get before & after functionality for your Angular $http requests

angular-aspected-dfd.js

/*
	This function allows you to define things happen before and after the receiving
	controller actually gets its data.
	
	Useful for caching the result set locally in a service.

	After comes prior to before because we want don't want to delay return of data to the
	controller unless absolutely necessary.
	
	Requires access to $q.
	
	Use it like this:
	
	return aspectedDFD(

		$http.get('/yourAPIEndpoint'),

		function(){
			// do something with the data after
		},
		
		function(){
			// do something with the data before
		},

	);
*/

function aspectedDFD( realDFD, after, before ){

	if( realDFD ){

		var dfd = $q.defer();

		realDFD.then(function(){

			if ( before ) 	before.apply(this, arguments);
					dfd.resolve.apply(this, arguments);
			if ( after ) 	after.apply(this, arguments);

		});

		return dfd.promise;
	}
}