text: module.exports = function (app) {
    if (typeof app.channel !== 'function') {
      // If no real-time functionality has been configured just return
      return
    }
  
    app.on('connection', connection => {
      // On a new real-time connection, add it to the anonymous channel
      app.channel('anonymous').join(connection)
    })
  
    app.on('login', (authResult, { connection }) => {
      // connection can be undefined if there is no
      // real-time connection, e.g. when logging in via REST
      if (connection) {
        // Obtain the logged in user from the connection
        // const user = connection.user;
  
        // The connection is no longer anonymous, remove it
        app.channel('anonymous').leave(connection)
  
        // Add it to the authenticated user channel
        app.channel('authenticated').join(connection)
  
        // Channels can be named anything and joined on any condition
  
        // E.g. to send real-time events only to admins use
        // if(user.isAdmin) { app.channel('admins').join(connection); }
  
        // If the user has joined e.g. chat rooms
        // if(Array.isArray(user.rooms)) user.rooms.forEach(room => app.channel(`rooms/${room.id}`).join(channel));
  
        // Easily organize users by email and userid for things like messaging
        // app.channel(`emails/${user.email}`).join(channel);
        // app.channel(`userIds/$(user.id}`).join(channel);
      }
    })
  
    // eslint-disable-next-line no-unused-vars
    app.publish((data, hook) => {
      // Here you can add event publishers to channels set up in `channels.js`
      // To publish only for a specific event use `app.publish(eventname, () => {})`
  
      // eslint-disable-next-line
      console.log(
        'Publishing all events to all authenticated users. See `channels.js` and https://docs.feathersjs.com/api/channels.html for more information.'
      )
  
      // e.g. to publish all service events to all authenticated users use
      return app.channel('authenticated')
    })
  
    // Here you can also add service specific event publishers
    // e.g. the publish the `users` service `created` event to the `admins` channel
    // app.service('users').publish('created', () => app.channel('admins'));
  
    // With the userid and email organization from above you can easily select involved users
    // app.service('messages').publish(() => {
    //   return [
    //     app.channel(`userIds/${data.createdBy}`),
    //     app.channel(`emails/${data.recipientEmail}`)
    //   ];
    // });
  }
  