Traverse folder directive in angularJS

folder-traverse.js

'use strict';

angular.module('traverse.folder', [])
	.factory('folderTraverse', ['$http', '$log', '$q', '$timeout', function(http, log, q, timeout){
		var filesInFolder    = [];
  		var traversalAPI  = {};

  		traversalAPI.getFiles = function(dataTransfer){

  			var defer = q.defer();

  			if(dataTransfer && dataTransfer.items){

	            var items = dataTransfer.items;

	            var length = items.length;

	            console.log("=== len ---", length);


	            //for(var i = 0; i < length; i++){

                var entry = items[0];

                if(entry.getAsEntry){  //Standard HTML5 API

                    entry = entry.getAsEntry();
                    console.log("-- getAsEntry --", entry);
                }
                else if(entry.webkitGetAsEntry){  //WebKit implementation of HTML5 API.

                    entry = entry.webkitGetAsEntry();
                    console.log("-- webkitGetAsEntry --", entry);
                }

                var promise = traversalAPI.traverseFileTree(entry);

                promise.then(function(data){
                	defer.resolve(data);

                }, function(err){

                	defer.reject(err);
                });

	            //}
	        }

  			return defer.promise;
  		}

  		traversalAPI.traverseFileTree = function(item, path){

  			var defer = q.defer();

  			path = path || "";
        

	        if (item.isFile) {
	            // Get file
	            console.log("item", item);
	            
	            item.file(function(file) {
	                //console.log("File:", path + file.name);
	                traversalAPI.filesInFolder.push(path+file.name);
	                defer.resolve('done')
	            });
	        } 
	        else if (item.isDirectory) {
	            // Get folder contents
	            var dirReader = item.createReader();
	            
	            dirReader.readEntries(function(entries) {
	            	console.log("--- dir count --", entries.length);
	            	//checkDirItems(entries, 0);
	            
	                for (var i=0; i < entries.length; i++) {

	                	console.log("--- entries ---", entries[i], item.name);
	                	var promise = traversalAPI.traverseFileTree(entries[i], path + item.name + "/");

	                	promise.then(function(data){

	                		defer.resolve(data)

	                	}, function(err){

	                		defer.reject(err);
	                	});
	                }
	            });
	        }

  			return defer.promise;
  		}


  		return traversalAPI
	}]);