waartaa / meteor-presence

Meteor package to help track users' presence

Meteor Presence

A very simple presence package, to track who's online, etc.

Installation

$ meteor add tmeasday:presence

Usage

Once added to your project, a new Meteor collection called Presences is available.

All active connections are then stored in this collection. A presence document from an authenticated user will contain their user id on the userId field.

NOTE: The package doesn't publish the presences by default, you'll need to do something like:

Meteor.publish('userPresence', function() {
  // Setup some filter to find the users your user
  // cares about. It's unlikely that you want to publish the 
  // presences of _all_ the users in the system.
  
  // If for example we wanted to publish only logged in users we could apply:
  // filter = { userId: { $exists: true }};
  var filter = {}; 
  
  return Presences.find(filter, { fields: { state: true, userId: true }});
});

And of course, don't forget to subscribe.

Meteor.subscribe('userPresence');

State function

If you want to track more than just users' online state, you can set a custom state function. (The default state function returns just 'online'):

// Setup the state function on the client
Presence.state = function() {
  return {
    currentRoomId: Session.get('currentRoomId')
  };
}

Now we can simply query the collection to find all other users that share the same currentRoomId

Presences.find({ state: { currentRoomId: Session.get('currentRoomId') }});

Of course Presence will call your function reactively, so everyone will know as soon as things change.

Contributing

Please! The biggest thing right now is figuring how to write tests.

License

MIT