Push notification on meteor

help
1

Hi!
I want to push notification to all client, when added data to collection and count new document added.
Screenshot%20from%202019-08-27%2018-41-13

How can I do, please help me ?

1 Like
2

Push notifications are notoriously complicated to implement on your own - the data flows are very complicated.

You’re better served to turn to a provider who has an easy-to-use API. I’ve had good experiences with OneSignal who also have a generous free tier.

3

I had this problem a little while ago: https://forums.meteor.com/t/fire-event-without-user-interaction/49523/3

I did it with a Interval that checks every second if a notification that gets in is set on false on the isSeen field.

Template.nav.onRendered(function (template) {
    Meteor.setTimeout(function(){ 
        const pnCount = PN.find({userGet: Meteor.user().username, isSeen: false, isTrash: false, isFav: false}, {sort: {createdAt: -1}}).count();
        Session.set('pnCount', pnCount);
      }, 1000);

      Meteor.setInterval(function(){

        var pnCount = Session.get('pnCount');
        const pnCountNew = PN.find({userGet: Meteor.user().username, isSeen: false, isTrash: false, isFav: false}, {sort: {createdAt: -1}}).count();
      
        if (pnCountNew > pnCount) {
          var audio = new Audio('sounds/blep.wav');
          audio.play();
          Session.set('pnCount', pnCountNew);
          console.log("Testlog: There is a new pn");
      
        } else {
          console.log("Testlog: There is none");
        }
      }, 3000);
  });

However, sometimes the browser won’t allow the sound-file to be played.
Coagmano suggested this approach, where you check your collection for changes

PN.find({
        userGet: Meteor.user().username,
        isSeen: false,
        isTrash: false,
        isFav: false,
    },
    { sort: { createdAt: -1 } }
).observeChanges({
    added() {
        var audio = new Audio('sounds/blep.wav');
        audio.play();
        console.log('Testlog: There is a new pn');
    },
});

which is basically less complicated than my approach but works the same.

4

OneSignal cannot ensure privacy. If your type of business doesn’t require privacy they might be ok …

1 Like
5

What is your exact case/problem here. The Push technology or the “notification to all client, when added data to collection and count new document added.”

6

I want to show client when I added new document.

7

Do you have any code you already wrote?

8

Here my code :


Meteor.publish('Notifications', function(selector) {   
  
  var self = this;
  let count = 0;
  
   const handler = Notification.find(selector).observeChanges({
     added: (id) => {
       count += 1;
     }
  })
   self.ready()

   console.log('1',count);
  self.onStop(() => handler.stop())

   return count
})

But when I reload page , it get data again. I want clear when clients click notification.

9

I’m not sure but the reason could be that the code is on the server? Maybe try relocate the observeChanges to the client instead?

10

Thank for your reply, I will try it on clients.