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

  def depends(_host, _opts) do
    []
  end

  def mod_options(_host) do
    []
  end

  def mod_doc() do
    %{:desc => 'This is just a demonstration.'}
  end

end