Angular and PhoneGap Event Queuing

I have this:

app.factory('contacts', function ($rootScope, $q, cordovaReady) {
    return {
        find: cordovaReady(function (filter) {
            var deferred = $q.defer();

            var options = new ContactFindOptions();
            options.filter = filter;
            options.multiple = true;
            var fields = ["displayName", "name", "addresses", "emails"];
            navigator.contacts.find(fields, function (contacts) {
                $rootScope.$apply(function () {
                    deferred.resolve(contacts);
                });

            }, function (error) {
                $rootScope.$apply(function () {
                    deferred.reject(error);
                });
            }, options);

            return deferred.promise;
        })
    };

and

app.factory('cordovaReady', function () {
    return function (fn) {

        var queue = [];

        var impl = function () {
            queue.push(Array.prototype.slice.call(arguments));
        };

        document.addEventListener('deviceready', function () {
            queue.forEach(function (args) {
                fn.apply(this, args);
            });
            impl = fn;
        }, false);

        return function () {
            return impl.apply(this, arguments);
        };
    };
});

Whenever I call from the controller:

var contactSearch = '';
contacts.find(contactSearch).then(function (contacts) {
    $scope.contacts = contacts;
}, function (error) {
    console.log(error);
});

I get:

ReferenceError: ContactFindOptions is not defined
    at Object.<anonymous> 

I made sure to wrap the function with cordovaReady. Why is this happening?