Add method to remove blank uuids

test/spec/controllers/inviteToGroupCtrlSpec.js

@@ -109,6 +109,20 @@ describe('Invite to Group Controller', function() {
 
         expect(scope.invitees).to.eql([{uuid: ''}]);
       });
+
+      it('removes blank fields from being sent', function() {
+        groups.Group.invite.yields();
+        scope.invitees = [{uuid: 'user1'}, {uuid: ''}, {uuid: 'user3'}];
+
+        scope.inviteNewUsers('uuid');
+
+        expect(groups.Group.invite).to.be.calledOnce;
+        expect(groups.Group.invite).to.be.calledWith({
+          gid: scope.group._id,
+        }, {
+          uuids: ['user1', 'user3']
+        });
+      });
     });
 
     context('invalid invite method', function() {

website/public/js/controllers/inviteToGroupCtrl.js

@@ -28,7 +28,7 @@ habitrpg.controller('InviteToGroupCtrl', ['$scope', 'User', 'Groups', 'injectedG
         });
       }
       else if (inviteMethod === 'uuid') {
-        var uuids = _.pluck($scope.invitees, 'uuid');
+        var uuids = _getOnlyUuids();
         Groups.Group.invite({gid: $scope.group._id}, {uuids: uuids}, function(){
           Notification.text(window.env.t('invitationsSent'));
           _resetInvitees();
@@ -41,6 +41,14 @@ habitrpg.controller('InviteToGroupCtrl', ['$scope', 'User', 'Groups', 'injectedG
       }
     }
 
+    function _getOnlyUuids() {
+      var uuids = _.pluck($scope.invitees, 'uuid');
+      var filteredUuids = _.filter(uuids, function(id) {
+        return id != '';
+      });
+      return filteredUuids;
+    }
+
     function _resetInvitees() {
       var emptyEmails = [{name:"",email:""},{name:"",email:""}];
       var emptyInvitees = [{uuid: ''}];