Javascript Nodejs recursive async call function for data collection from a remote source

recursive-async-data-collect.js

/*
 the example find data from facebook api search endpoint 
*/

var findPages = function($center, $limit, $offset, callback) {
	FB.api("/search", {q: "", type: "place", center: $center, distance: "15000", limit: $limit, offset: $offset, access_token: access_token}, function(result) {
		callback(result);
	});	
};


var getLocationData = function(icenter, ilimit, ioffset, callMebackWhenFinish) {
	var allPagesFoundInLocation = [];
	
	// only for the first call
	getNextDataPage(icenter, ilimit, ioffset);

	function getNextDataPage(center, limit, offset) {
		findPages(center, limit, offset, function(res) {
			res.data.forEach(function(row) {
				allPagesFoundInLocation.push(row);
			});
			
				
			if (res.data.length < limit) {
				callMebackWhenFinish(allPagesFoundInLocation);
			} else {
				getNextDataPage(center, limit, offset + limit);
			}
		});
	}
};




var center 		= "40.75,-73.98";
var limit 		= 100;
getLocationData(center, limit, 0, function(result) {
	console.log("all work done");
	console.log(result);
});