AngularFire add in reverse order - angularjs

Question

I need to add objects to Firebase in reverse order. Or reverse data when goes data binding. Or sort objects by time of create.
var ref = new Firebase("https://[url].firebaseio.com/");
$scope.messages = $firebase(ref);
$scope.addMessage = function(e) {
$scope.messages.$add({title: $scope.title, body: $scope.msg, time: $scope.getDate() });
}
<div class="well span3 pull-left note" ng-repeat="(key, msg) in messages">
<button type='button' class='close' ng-click="messages.$remove(key)">×</button>
<b>{{msg.time| date: 'medium'}}</b>
<span>{{msg.title}}</span>
<span>{{msg.body}}</span>
<button ng-click="changeMessage(key)" class="btn btn-mini pull-right"><i class="icon-pencil"></i></button>
</div>
I try to use OrderBy atribute for ng-repeat but this is not easy because in messages are stored objects.

Answer 1

Check out the chat example in angularFire-seed. It uses a custom reverse filter
The reverse filter looks like so:
app.filter('reverse', function() {
function toArray(list) {
var k, out = [];
if( list ) {
if( angular.isArray(list) ) {
out = list;
}
else if( typeof(list) === 'object' ) {
for (k in list) {
if (list.hasOwnProperty(k)) { out.push(list[k]); }
}
}
}
return out;
}
return function(items) {
return toArray(items).slice().reverse();
};
});
And the usage is like so:
<ul id="messages" ng-show="messages">
<li ng-repeat="message in messages | reverse">{{message.text}}</li>
</ul>