// Join the admin channel
app.channel('admins').join(connection);

// Leave the admin channel
app.channel('admins').leave(connection);

// Leave a channel conditionally
app.channel('admins', 'rooms').leave(connection => connection.userId === user._id);

// Leave all room channels
const roomChannels = app.channels.filter(channel => channel.indexOf('room/') === 0);

app.channel(roomChannels).leave(connection);

// Leave all channels
app.channel(app.channels).leave(connection);

// Example: Join an anonymous channel
app.on('connection', connection => {
  // Add to the anonymous channel
  app.channel('anonymous').join(connection);
});

// Example: Join the users rooms
app.on('login', (payload, meta) => {
  const connection = meta.connection;

  // Connection can be undefined e.g. when logging in via REST
  if(connection) {
    // Leave anonymous channel first
    app.channel('anonymous').leave(connection);

    // Get the user object and stick into channels
    app.service('users').get(payload.userId).then(user => {
      // A channel just for this user
      app.channel(`users/${user._id}`).join(connection);

      // Put user into the chat rooms they joined
      user.rooms.forEach(roomId => {
        app.channel(`rooms/${roomId}`).join(connection);
      });
    });
  }
});