Restrict number of users in a session in vline

Question

Can I restrict the number of users in a session? Is there any option in vline.session? Please guide if this can be done by writing custom javascript.

EDIT:

Referring to https://vline.com/developer/docs/vline.js/vline.MediaSession#examples, a two party call controller is explained. I want to ask is there any way to restrict number of users in a session? There is no such option present in session's docs. Is it supported as a part of the API?

If this can be done using custom javascript, how?

As a part of my effort, I have tried to implement vline-django examples, but could not find a section in documentation that addresses this issue.

EDIT 2: The code that is working for me.

  var vlineClient = (function(){

  var client, session,
    authToken = {{ user|vline_auth_token|safe }},
    serviceId = {% vline_service_id %},
    profile = {{ user|vline_user_profile|safe }};

  // Create vLine client  
  window.vlineClient = client = vline.Client.create({"serviceId": serviceId, "ui": true});
  // Add login event handler
  client.on('login', onLogin);
  // Do login
  client.login(serviceId, profile, authToken);

  function onLogin(event) {
    session = event.target;

    // Find and init call buttons
    var callButtons = document.getElementsByClassName('callbutton');
    for (var i=0; i < callButtons.length; ++i) {
      initCallButton(callButtons[i]);
    }
  }

  // add event handlers for call button
  function initCallButton(button) {
    var userId = button.getAttribute('data-userid');

    // fetch person object associated with username
    session.getPerson(userId).done(function(person) {
      // update button state with presence
      function onPresenceChange() {
        button.setAttribute('data-presence', person.getPresenceState());
      }

      // set current presence
      onPresenceChange();

      // handle presence changes
      person.on('change:presenceState', onPresenceChange);

      // start a call when button is clicked
      button.addEventListener('click', function() {
        person.startMedia();
      });
    });
  }

  return client;
})();

How do I move ahead?

Reference: https://vline.com/developer/docs/vline.js/

Answer 1

if i understand correctly the OP is trying to make a multi-user chat room - this is also what i wanted to do with vline and because i wanted a/v chat as well the number of participants should obviously be capped - it appears that the term 'session' is causing the confusion here so i will refrain from using it

i worked around this by creating a fixed number of users in a db and handling authentication myself before actually associating a visitor with one of the prepared users - so some javascript logs in each visitor as one of those existing 'anonymous' users and sets only a logged_in? flag in the db so that the next visitor will log in as the next vacant user slot and when all slots are occupied the visitor gets a "chat room full - try again later" response

probably not the most elegant solution - for example the visitor chosen usernames are stored client-side and must be re-assigned to one of the user-definable vline session vars so it can be passed along with each message and the logged_in? db flag needs to be reset when the user exits

note that this was almost a year ago so im a bit foggy on exactly what i did but my app (rails) in up on github if youre interested to fork it - also i should add that although this sort of thing wasnt strictly supported by the vline API at the time there were at least some hints that some analogous feature was being prepared for so there may be some API support for this now - i did notice since then that they have released a "chat room demo" app on github and i would expect that their implementation is more concise than mine so you may want to look at that first - my app tho does have a mostly complete UI with gravatars and collaboration is welcomed