loadZoo function

loadZoo.js

 loadZoo: function (uri) {
                    //IMPORTANT TO RETURN THE PROMISE
                    return Windows.Storage.StorageFile.getFileFromApplicationUriAsync(uri)
                        .then(function (file) {
                            return Windows.Storage.FileIO.readTextAsync(file)
                                .then(function (textFromFile) {
                                    var myParsedJsonData = JSON.parse(textFromFile);

                                    //this will store all the new animals transferred to zoo
                                    var zoo = new Array();

                                    if (myParsedJsonData) {
                                        myParsedJsonData.forEach(function (newObject) {
                                            var newAnimal = Zoo.Animal.buildAnimal(newObject);
                                            zoo.push(newAnimal);
                                        });
                                    }

                                    return zoo;
                                });
                        });
                }