Firebase snapshot with infinite list


#1

I have a set of data within a users profile which holds the UID of all the posts they have liked. I am using a data snapshot to show these images within the users profile, but I would like to load it lazy or use ionic infinite scroll to load more items as the user scrolls.

I tried by making two duplicate snap shots. First one intialises the feed upon the page loading, and then I wanted the second one to load by using ionic infinite scroller.

But it doesn’t work.

Does anyone know of a better way to do this?

service.js

getWardrobeFeed: function(){
var defered = $q.defer();
var user = User.getLoggedInUser();
var wardrobeKeyRef = new Firebase(FIREBASE_URL + ‘/userProfile/’ + user.uid + ‘/wardrobe’);
wardrobeKeyRef.orderByKey().limitToLast(2).on(‘child_added’, function (snap) {
var imageId = snap.key();
userImageRef.child(imageId).on(‘value’, function (snap) {
$timeout(function () {
if (snap.val() === null) {
delete userWardrobeFeed[imageId];
} else {
userWardrobeFeed[imageId] = snap.val();
}
});
});
});
wardrobeKeyRef.orderByKey().limitToLast(2).on(‘child_removed’, function (snap) {
var imageId = snap.key();
$timeout(function () {
delete userWardrobeFeed[imageId];
});
});
defered.resolve(userWardrobeFeed);
return defered.promise;
},

getWardrobeItems: function(){
var defered = $q.defer();
var user = User.getLoggedInUser();
var wardrobeKeyRef = new Firebase(FIREBASE_URL + ‘/userProfile/’ + user.uid + ‘/wardrobe’);
wardrobeKeyRef.orderByKey().limitToFirst(2).on(‘child_added’, function (snap) {
var imageId = snap.key();
userImageRef.child(imageId).on(‘value’, function (snap) {
$timeout(function () {
if (snap.val() === null) {
delete userWardrobe[imageId];
} else {
userWardrobe[imageId] = snap.val();
}
});
});
});
wardrobeKeyRef.orderByKey().on(‘child_removed’, function (snap) {
var imageId = snap.key();
$timeout(function () {
delete userWardrobe[imageId];
});
});
defered.resolve(userWardrobe);
return defered.promise;
},

controller.js

$scope.userWardrobe = [];

Service.getWardrobeFeed().then(function(items){
$scope.userWardrobe = items;
});

$scope.loadMore = function() {
Service.getWardrobeItems().then(function(items){
$scope.userWardrobe = $scope.userWardrobe.concat(items);
$scope.$broadcast(‘scroll.infiniteScrollComplete’);
});
};