xmpp.chapril.org-ejabberd/lib/mod_presence_demo.ex

defmodule ModPresenceDemo do
  use Ejabberd.Module

  def start(host, _opts) do
    info('Starting ejabberd module Presence Demo')
    Ejabberd.Hooks.add(:set_presence_hook, host, __MODULE__, :on_presence, 50)
    :ok
  end

  def stop(host) do
    info('Stopping ejabberd module Presence Demo')
    Ejabberd.Hooks.delete(:set_presence_hook, host, __MODULE__, :on_presence, 50)
    :ok
  end

  def on_presence(user, _server, _resource, _packet) do
    info('Receive presence for #{user}')
    :none
  end
end