app.service('messages').dispatch('eventname', (message, hook) => {
  // Just dispatch to one user
  if(message.isPrivate) {
    return app.channel(message.receiver_id);
  }

  // Returning falsy or nothing will do nothing
});

// Send to a certain room
app.service('messages').dispatch('eventname', (message, hook) => {
  return app.channel(`rooms/${message.roomId}`);
});

// EVERYONE
app.service('messages').dispatch('eventname', (message, hook) => {
  return app.channel(app.channels);
});

// Filter connections manually, e.g. if the connection user and message user are friends
// This works similar to the old event filters
app.service('messages').dispatch('eventname', (message, hook) => {
  return app.channel(app.channels).filter(connection => connection.user.friends.indexOf(message.user) !== -1);
});

// Modify the data that are sent to the channel for that event
app.service('messages').dispatch('eventname', (message, hook) => {
  const modifiedMessage = cloneAndModify(message);

  return app.channel(`rooms/${message.roomId}`, `rooms/general`).send(modifiedMessage);
});